KR102598705B1 - Breathalyzer based on sensor fusion and a breathalyzer measurement method using the breathalyzer - Google Patents

Abstract

The present invention relates to a breathalyzer based on sensor fusion and a blood alcohol measurement method using the breathalyzer. The breathalyzer based on sensor fusion is configured to: be provided with a semiconductor-type alcohol sensor and an electrochemical alcohol sensor together; measure a driver's blood alcohol through the semiconductor-type alcohol sensor at a relatively lower temperature and measure the driver's blood alcohol through the electrochemical alcohol sensor at a relatively higher temperature based on the temperature in a vehicle; and thus fundamentally prevent driving under the influence by controlling the vehicle not to be started when the driver's blood alcohol is identified. The breathalyzer based on sensor fusion according to the present invention is installed in a vehicle and includes a temperature sensor unit, a first alcohol sensor unit, a second alcohol sensor unit, and a control unit. The temperature sensor unit measures the temperature in a vehicle. The control unit controls the first or second alcohol sensor unit to be selectively operated based on the temperature measured by the temperature sensor unit.

Description

Sensor fusion based breathalyzer and breathalyzer test method using the breathalyzer {BREATHALYZER BASED ON SENSOR FUSION AND A BREATHALYZER MEASUREMENT METHOD USING THE BREATHALYZER}

The present invention relates to a sensor fusion-based breathalyzer and a breathalyzer method using the breathalyzer. More specifically, it is equipped with a semiconductor alcohol sensor and an electrochemical alcohol sensor, and has a relatively low temperature based on the temperature inside the vehicle. At relatively high temperatures, it measures whether the driver is drinking through a semiconductor alcohol sensor, and at relatively high temperatures, it measures whether the driver is drinking through an electrochemical alcohol sensor. Furthermore, when the driver's drinking is confirmed, the vehicle is controlled to not start, preventing drunk driving. It relates to a sensor fusion-based breathalyzer that can be prevented at its source and a breathalyzer test method using the breathalyzer.

According to statistical data from the National Police Agency and the Road Traffic Authority, the total number of traffic accidents in Korea in 2020 was 209,654, of which 17,247 were drunk driving accidents, which means that drunk driving accidents account for 8.2% of all traffic accidents. You can see that

The number of casualties caused by drunk driving is not decreasing despite the strengthening of punishment and continuous police crackdowns. From 2016 to 2020, the detection rate has been steadily increasing, and since drunk driving cases are often re-detected, measures to prevent recurrence are also important. Meanwhile, this is the number of cases detected by police drunk driving crackdowns, and it is estimated that the number will be higher if you include drunk drivers who were not actually caught in drunk driving crackdowns.

This is not a problem that occurs only in Korea, but in all countries including the United States, Japan, and Europe, the number of traffic accident casualties due to drunk driving is at a serious level, and it is analyzed that 30% of all traffic accidents are directly or indirectly caused by drunk driving. . For this reason, developed countries are researching and implementing various measures, including legal mandates, to fundamentally prevent drunk driving. For example, the U.S. state of New Mexico enacted a law in 2005 mandating drunk driving prevention devices for even first-time drunk driving offenders, and since then, deaths due to drunk driving accidents have decreased by 35%.

Due to the effectiveness of these drunk driving prevention devices in preventing drunk driving, there is a trend toward specific use of these devices, such as legislating the installation of these devices in many other states in the United States, Europe, and Australia, and in the United States, 48 out of 52 states are using them. A mandatory installation program is in progress. This program is a legal mechanism that forces drivers caught for drunk driving to wear anti-drinking devices, and each state imposes them differently depending on the level of drunk driving. However, 11 of these states require all first-time drunk driving offenders to wear drunk driving prevention devices. Strong laws are in place, and a bill is pending in the U.S. House of Representatives that would require all states to implement them. Meanwhile, France and Sweden are already enforcing the mandatory installation of drunk driving prevention devices on school buses and trucks, and are planning to make it mandatory for all vehicle types in the future. Sweden's Volvo Cars is equipped with a drunk driving prevention device on its trucks and sells it as an option on its passenger cars. In addition, most automobile manufacturers around the world, such as Toyota and Hyundai Motors, are reviewing and developing BIID.

Europe has decided to make it mandatory for all vehicles to have a drunk driving prevention device that prevents the engine from starting if the blood alcohol concentration is above the standard after a breathalyzer test.

In addition, in the case of Woorina, on April 21, 2021, the National Human Rights Commission of Korea required that if a person wants to drive again after having their license suspended or revoked for drunk driving, an 'alcohol detection breathalyzer (ignition interlock device)' is installed in the vehicle and alcohol treatment is required. A plan to complete the course is being prepared and recommended to the National Police Agency. Accordingly, the National Police Agency has recognized the need and is pursuing it after consultation with related organizations. In addition, in Korea, awareness of this device has been lacking, but active discussions have spread starting with the 'Road Traffic Act Partial Amendment Act' proposed in October 2009, and major candidates for the 20th presidential election have also announced punishment for drunk driving as an election pledge. In order to strengthen and prevent drunk driving, a device to prevent drunk driving is being promoted as a pledge.

Meanwhile, as the number of accidents caused by drunk driving increases rapidly, many drunken driving crackdowns are being carried out to prevent them. Breathalyzers used for such drinking control generally include those using semiconductor alcohol sensors and those using electrochemical alcohol sensors. Semiconductor alcohol sensors have the advantages of fast response speed, low price, and small size, but the disadvantages of high power consumption, mechanical durability, and low selectivity. On the other hand, electrochemical alcohol sensors have the advantages of high selectivity, no power consumption, and precise measurement, but have the disadvantages of requiring heating at low temperatures and being expensive.

Meanwhile, all alcohol sensors currently used in drunk driving prevention devices are electrochemical sensors. Electrochemical sensors have a very fast measurement preparation time of less than 5 seconds above room temperature, and have superior accuracy and selectivity compared to semiconductor sensors, but the signal is very weak at low temperatures, so they are mostly used with a separate heater.

The European standard for the performance of drunk driving prevention devices requires that they operate at -40 degrees, but there is a problem in that it takes several minutes of heater operation time to raise the temperature to a temperature that allows sensor operation at this temperature, and the German company Drager, the world's best drunk driving prevention device, The product also has a measurement preparation time of 120 seconds, which is still long.

It is an extremely inconvenient situation for test takers to wait for moisture in a vehicle in the cold weather to take a breathalyzer test, and this can be said to be the biggest factor hindering the popularization of drunk driving prevention devices. In fact, the first requirement of customers' drunk driving prevention devices is whether they have obtained European certification and the shortest possible measurement preparation time.

Therefore, in order to solve the above-mentioned shortcomings of existing drunk driving prevention devices, we developed a semiconductor alcohol sensor with a fast initial stabilization time (within 30 seconds) and excellent accuracy even at -40°C, and can operate without a separate heater above 0°C. There is an emerging need to develop an electrochemical alcohol sensor capable of fast and accurate measurement (within 5 seconds of measurement preparation time) and to develop a drunk driving prevention device that operates with an optimal algorithm by using the above two sensors in combination depending on the temperature inside the vehicle. .

Republic of Korea Patent Publication No. 10-0549119 (announced on February 2, 2006, ‘Semiconductor type breathalyzer’) Republic of Korea Patent Publication No. 10-2014-0024993 (published on March 4, 2014, ‘Electrochemical gas sensor’) Republic of Korea Patent Publication No. 10-2017-0130223 (published on November 28, 2017, ‘Vehicle control device and method of operation’) Republic of Korea Patent Publication No. 10-0816249 (Public notice dated March 24, 2008, ‘Device for preventing drunk driving’)

The purpose of the present invention to solve the above-mentioned problems is a sensor fusion-based breathalyzer that can control the semiconductor alcohol sensor and the electrochemical alcohol sensor to operate alternatively according to the temperature inside the vehicle, and the breathalyzer using the breathalyzer. It provides a method of measuring alcohol intake.

In order to achieve the above-described object, the sensor fusion-based breathalyzer device according to an embodiment of the present invention is installed in a vehicle and includes a temperature sensor unit, a first alcohol sensor unit, a second alcohol sensor unit, and a control unit, The temperature sensor unit measures the temperature inside the vehicle, and the control unit controls the first alcohol sensor unit or the second alcohol sensor unit to operate alternatively based on the temperature measured by the temperature sensor unit.

The control unit controls the first alcohol sensor unit to operate when the temperature measured by the temperature sensor unit is 0°C or higher, and the control unit controls the operation of the first alcohol sensor unit when the temperature measured by the temperature sensor unit is less than 0°C. Controls the second alcohol sensor unit to operate.

The control unit primarily causes the second alcohol sensor unit to operate when the temperature measured by the temperature sensor unit is less than 0°C, and secondarily operates the first alcohol sensor unit when alcohol is detected by the second alcohol sensor unit. Controls the operation of the alcohol sensor unit.

The first alcohol sensor unit includes an electrochemical alcohol sensor, and the second alcohol sensor unit includes a semiconductor alcohol sensor.

The control unit controls at least one of the first alcohol sensor unit and the second alcohol sensor unit to warm up when the vehicle door is detected.

The control unit controls the ignition lock device to operate when the first alcohol sensor unit or the second alcohol sensor unit detects alcohol.

The semiconductor alcohol sensor includes a ceramic substrate.

The semiconductor alcohol sensor includes a Ceramic Micro-Machined Structure (CMMS) structure.

The electrochemical alcohol sensor includes an acidic liquid electrolyte and a porous electrolyte carrier.

The electrochemical alcohol sensor includes an electrode made of high specific surface area porous platinum or a precious metal alloy.

The control unit processes the signal detected from the electrochemical alcohol sensor using two-channel amplification technology.

In order to achieve the above-described object, the alcohol alcohol measurement method using a sensor fusion-based breathalyzer device according to an embodiment of the present invention includes a first step in which the temperature sensor measures the temperature in the vehicle and the control unit measures the measured temperature. It includes a second step of controlling the first alcohol sensor unit or the second alcohol sensor unit to operate alternatively.

According to the present invention, a sensor fusion-based breathalyzer device and a breathalyzer method using the breathalyzer device, the semiconductor alcohol sensor and the electrochemical alcohol sensor can be controlled to operate alternatively according to the temperature inside the vehicle. It has the effect of shortening the measurement preparation time of the alcohol sensor.

According to the present invention, a sensor fusion-based breathalyzer device and a breathalyzer method using the breathalyzer device, it is possible to fundamentally prevent drunk driving by controlling the vehicle to not start when the driver's drinking is confirmed.

Figure 1 is a diagram showing an example of a sensor fusion-based breathalyzer measuring device according to the present invention.
Figure 2 is a block diagram showing each configuration in the sensor fusion-based breathalyzer device according to the present invention.
Figures 3 and 4 are diagrams showing a general semiconductor alcohol sensor.
Figure 5a is a perspective view showing a preferred embodiment of the structure of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 5b is a perspective view showing another example of the structure of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 5c is a plan view showing another example of the structure of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 5d is a plan view showing another example of the structure of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 6 is a side cross-sectional view schematically showing the side structure of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 7 is a usage state diagram (ceramic base installation structure) showing an example of the usage state of the semiconductor alcohol sensor including the CMMS structure according to the present invention.
Figure 8 is a usage state diagram (ceramic base removal structure) showing another embodiment of the usage state of the semiconductor alcohol sensor including the CMMS structure according to the present invention.
Figure 9 is a plan view (parallel structure) showing another embodiment of the overall configuration of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 10 is a side view (laminated structure) showing another embodiment of the overall configuration of a semiconductor alcohol sensor including a CMMS structure according to the present invention.
Figure 11a is a plan view showing the electrode portion on the upper part (sensing film) of a ceramic substrate according to the present invention.
Figure 11b is a bottom view showing the electrode part of the lower part (heater part) of the ceramic substrate according to the present invention.
Figure 12 is a diagram showing one embodiment of an electrochemical alcohol sensor according to the present invention.
FIG. 13 is a diagram showing the sensing cell shown in FIG. 12.
Figure 14 is a conceptual diagram schematically showing a breathalyzer measuring device including a low-temperature electrochemical alcohol sensor according to the present invention.
Figure 15 is a diagram showing the output signal of the detector in normal mode.
FIG. 16 is a block diagram of the controller shown in FIG. 14.
Figure 17 is a diagram showing the output signal of the detection unit in low concentration mode.
Figure 18 is a flowchart showing the flow of a breathalyzer test method using a sensor fusion-based breathalyzer device according to the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings.

Also, in describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

In this specification, singular forms also include plural forms unless specifically stated in the phrase. As used in the specification, “comprises” and/or “including” does not exclude the presence or addition of one or more other components in addition to the mentioned components.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a diagram showing an embodiment of a sensor fusion-based breathalyzer device 1000 according to the present invention, and Figure 2 is a block diagram showing each configuration within the sensor fusion-based breathalyzer device 1000 according to the present invention. am.

The sensor fusion-based breathalyzer device 1000 (hereinafter referred to as the ‘breathability test device 1000’) according to the present invention is installed in a vehicle. Drivers take a breathalyzer test before starting the vehicle. The breathalyzer 1000 operates the ignition lock device installed in the vehicle so that the vehicle cannot be started when it is confirmed that the driver is drinking. The ignition lock device will be described later.

Referring to FIGS. 1 and 2, the breathalyzer device 1000 according to the present invention includes a temperature sensor unit 500, a first alcohol sensor unit (200, 300), a second alcohol sensor unit (9, 100), and It includes control units 400 and 360 (FIGS. 14 and 16). In addition, the breathalyzer device 1000 according to the present invention may further include known components for breathalyzer measurement, for example, exhalation inlets 211 and 320 (FIGS. 12 and 320) for collecting the driver's exhaled gas. 14)), exhalation outlets 212 and 324 (FIGS. 12 and 14), etc. may be further included. Additionally, each component included in the known breathalyzer device 1000 may be further included.

The temperature sensor unit 500 measures the temperature inside the vehicle. Alternatively, the temperature sensor unit 500 may measure the temperatures of the first alcohol sensor units 200 and 300 and the second alcohol sensor units 9 and 100. The temperature sensor unit 500 transmits the measured temperature to the control unit 400.

The first alcohol sensor unit (200, 300) and the second alcohol sensor unit (9, 100) each include a detection unit (1, 20, 220, 350) that generates an alcohol detection signal according to the alcohol concentration of the inhaled exhaled gas. A heater unit (1b, 30) that heats the detection units (1, 20, 220, 350), a blood alcohol concentration calculation unit (365) that converts the alcohol detection signal into a digital signal and calculates the alcohol concentration from the alcohol detection signal, and the calculated It may further include a display unit 370 that displays the alcohol concentration.

The first alcohol sensor units 200 and 300 and the second alcohol sensor units 9 and 100 may include alcohol sensors having different optimal temperatures for measuring an alcohol detection signal. In detail, the first alcohol sensor unit (200, 300) includes an electrochemical alcohol sensor (200, 300), and the second alcohol sensor unit (9, 100) includes a semiconductor alcohol sensor (9, 100). You can.

As described above, the electrochemical alcohol sensor (200, 300) is capable of precise measurement at room temperature, but has the disadvantage of requiring a long preparation time for heating at low temperatures, especially below 0°C. On the other hand, the semiconductor alcohol sensor (9, 100) does not measure as precisely as the electrochemical alcohol sensor (200, 300), but the preparation time for heating does not take that long even at temperatures below 0°C.

Therefore, based on the temperature received from the temperature sensor unit 500, the control unit 400 performs a breathalyzer test through the first alcohol sensor units 200 and 300 at normal temperatures, and uses the second alcohol sensor in special situations where the temperature is relatively low. A breathalyzer test is performed through units 9 and 100. That is, the control unit 400 controls the first alcohol sensor units 200, 300 or the second alcohol sensor units 9, 100 to operate alternatively based on the temperature measured by the temperature sensor unit 500.

For example, the control unit 400 controls the first alcohol sensor units 200 and 300 to operate when the temperature measured by the temperature sensor unit 500 is 0°C or more and less than 85°C, and the temperature sensor unit 500 controls the first alcohol sensor units 200 and 300 to operate. When the temperature measured by 500 is less than 0°C or more than -40°C, the second alcohol sensor units 9 and 100 are controlled to operate to shorten the measurement preparation time of each alcohol sensor.

In addition, the control unit 400 performs a breathalyzer test through the second alcohol sensor units 9 and 100 because the temperature measured by the temperature sensor unit 500 is between less than 0°C and more than -40°C. 2 When alcohol is detected in a breathalyzer test through the alcohol sensor unit (9, 100), each alcohol sensor (9, 100, 200, 300) is used to perform a breathalyzer test through the first alcohol sensor part (200, 300). You can control it. That is, the control unit 400 primarily performs a breathalyzer test at a low temperature below 0°C through the second alcohol sensor units 9 and 100, which have a relatively short measurement preparation time, and alcohol is detected during the breathalyzer test. In this case, a second alcohol test is performed once again through the first alcohol sensor unit (200, 300), which can detect alcohol more accurately than the second alcohol sensor unit (9, 100).

At this time, the control unit 400 operates the heater units (1b, 30) of the first alcohol sensor units (200, 300) during the first alcohol test through the second alcohol sensor units (9, 100) to Heat 200, 300). Therefore, while the first alcohol sensor unit 200, 300, which has a relatively long measurement preparation time, is heated, the first alcohol sensor unit 200, 300) can have the effect of reducing the driver's waiting time during the measurement preparation time.

The control unit 400 is connected to the vehicle's self-diagnosis unit (On-board diagnostics, OBD) through LIN (Local Interconnect Network) communication or CAN (Controller Area Network) communication to receive the vehicle's door opening measurement value. The control unit 400 detects the door opening of the vehicle based on the received door opening measurement value. At this time, door opening includes door opening by manipulation from a remote location. The control unit 400 controls at least one of the first alcohol sensor units 200 and 300 and the second alcohol sensor units 9 and 100 to warm up when the vehicle door is detected, and at this time, the warm-up involves the operation of the heater units 1b and 30 of each sensor unit. For example, when the door of the vehicle is detected, the control unit 400 operates the temperature sensor unit 500 to detect the temperature inside the vehicle, the first alcohol sensor unit 200, 300, or the second alcohol sensor unit 9, 100) is controlled to measure the temperature. The control unit 400 warms up the first alcohol sensor unit 200, 300 or the second alcohol sensor unit 9, 100 based on the temperature measured according to the operation of the temperature sensor unit 500. Thereafter, the control unit 400 performs a breathalyzer test through the first alcohol sensor unit (200, 300) or the second alcohol sensor unit (9, 100) based on the temperature measured as described above.

Meanwhile, when alcohol is detected in a breathalyzer test performed through the first alcohol sensor unit (200, 300) or the second alcohol sensor unit (9, 100), the control unit 400 provides an ignition lock function that prevents the rotation of the ignition key. Operate the device (not shown).

As an example, the ignition lock device, as disclosed in Registered Patent No. 10-0816249, is integrally mounted on the key module of the vehicle and rotates integrally with the rotation of the key inserted into the key insertion hole, and has a rotating plate forming a locking jaw on one side. (not shown) and a locking means including a rod that moves according to the alcohol detection signal from the control unit 400. The rod of the locking means includes a locking means (not shown) that moves forward or backward from the locking jaw of the rotating plate to allow or disallow rotation of the key inserted in the rotating plate according to the alcohol detection signal from the control unit 400.

In order for the driver to start the vehicle, he or she must perform a breathalyzer test through the first alcohol sensor unit (200, 300) or the second alcohol sensor unit (9, 100) and unlock the ignition lock device.

The ignition lock device maintains the rod of the locking device in a forward state when the vehicle is stopped, that is, when the vehicle is not started. Therefore, in this state, even if the user tries to start the engine by inserting the key into the key insertion hole of the key module through the key hole of the rotating plate and rotating it, the rotating plate that rotates with the rotation of the key has its locking jaw hit by the rod of the locking means. It gets stuck and can no longer rotate, so the vehicle won't start.

In order for the driver of the vehicle to start the vehicle, the rod of the locking means must be reversed. When the driver blows exhaled breath into the exhalation inlet (211, 320) of the breathalyzer 1000 to drive the vehicle, the first alcohol sensor unit (200, 300) or the second alcohol sensor unit (9, 100) detects the exhaled breath. The alcohol concentration is measured, compared with the set standard value, and displayed on the display unit 370. At the same time, if the alcohol concentration of the measured exhaled breath is lower than the set standard value, that is, the driver is not drinking, so it is okay to drive. An electrical signal is provided to the locking means, and the electrical signal at this time retracts the rod. If the driver has been drinking and the alcohol concentration is detected to be higher than the set standard, no signal is provided and the rod of the locking means remains locked (forward state) and the vehicle does not start.

Meanwhile, the ignition lock device is not limited to preventing rotation of the physical ignition key described above, and may be configured to block the input signal of the digital key.

Figures 3 and 4 are diagrams showing a general semiconductor alcohol sensor (9).

As described above, the second alcohol sensor unit (9, 100) includes a semiconductor alcohol sensor (9, 100).

Generally, in the semiconductor alcohol sensor (9, 100), when the inhaled exhaled gas of a person is adsorbed on the detection unit (1, 20), alcohol molecules are oxidized on the surface of the detection unit (1, 20), and this oxidation reaction occurs. The electrical conductivity of the sensing units 1 and 20 is increased, and the blood alcohol concentration is measured through a mechanism that converts the signal change range into a BAC value according to a specific BAC (Blood Alcohol Concentration) conversion formula.

At this time, referring to FIGS. 3 and 4, the general semiconductor alcohol sensor 9 is provided with a sensor chip 1, which is a sensing part, and a stem 2 to maintain the sensor chip 1, and the stem ( 2) is electrically connected to the stem support (2a), which is an insulator, and the electrode pad (1a) of the sensor chip (1) and the stem head (3a) are bonded with a wire (4) through the stem support (2a) vertically. It consists of a plurality of stampins (3).

Therefore, the signal input and output of the sensor chip (1) is performed by a circuit ultimately connected to the stem pin (3) through the electrode pad (1a) and the stem head (3a) bonded with the wire (4), and the sensor chip (detecting part) 1) is an area that detects gas and generates an electric signal. Due to the nature of the semiconductor alcohol sensor 9, it must maintain a temperature of several hundred degrees or more, so a heater part 1b is provided on the bottom, and the heater part 1b is provided with a heater part 1b. In order to efficiently maintain the high temperature caused by the sensor chip (1), the sensor chip (1) is usually floating at a predetermined height while being supported only by the wire (4) so that the heat of the sensing unit does not leak to the outside. That is, since the sensing material of the general semiconductor alcohol sensor (9) operates at a high temperature of 300 to 400°C, it is equipped with a heater unit for this purpose, and is used with a thin wire (4) to prevent the heat generated from the heater unit from leaking to the outside. It is made in the form of floating the sensor chip (1) in the air. Therefore, the general semiconductor alcohol sensor (9) has an inherent vulnerability in that the wire (4) is disconnected due to mechanical shock such as vibration, and this disadvantage is bound to become the biggest vulnerability, especially when the breathalyzer is installed in the vehicle. does not exist.

Therefore, in this specification, we aim to fundamentally solve this problem through a semiconductor alcohol sensor 100 with excellent mechanical strength through a semiconductor alcohol sensor 100 containing a CMMS (Ceramic Micro-Machined Structure) structure that does not use wires. do.

The semiconductor alcohol sensor 100 including a CMMS structure has excellent mechanical strength because the substrate itself is directly attached to the package (electrically conductive adhesive) without using wires.

The semiconductor alcohol sensor 100 including the CMMS structure according to the present invention is punched on a ceramic substrate and then mounted on the upper and lower surfaces of the ceramic substrate through screen printing, so that mass production through automation is possible. It is possible and does not require bonding wire work to be installed in the device, so it has excellent work efficiency and almost no defects.

Figure 5a is a perspective view showing a preferred embodiment of the structure of a semiconductor alcohol sensor 100 including a CMMS structure according to the present invention, and Figure 5b is a semiconductor alcohol sensor 100 including a CMMS structure according to the present invention. ) is a perspective view showing another example of the structure, and Figure 5c is a plan view showing another example of the structure of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention, and Figure 5d is a plan view showing another example of the structure of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention.

Figures 5A to 5D are diagrams showing various embodiments of the structure of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention. The present invention is a method of reducing the high heat transmitted by the heater unit in the existing bonding wire method. In order to efficiently maintain the heater unit and the sensing unit made of chips to prevent heat from leaking out, the heater unit and the sensing unit, which were supported only by wires (see FIGS. 3 and 4), were replaced with wires that were omitted and mounted on a separate ceramic substrate 10. It provides structure.

For this purpose, the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention is provided with a drilling hole 40 that penetrates the center of the insulating ceramic substrate 10 by laser processing or a punching machine, and the drilling hole ( 40) is bent (FIGS. 5A, 5B) or rounded (FIGS. 5C, 5D) considering the shape of the sensor detection film 20 or heater unit 30 that serves as the sensing unit 20. It is provided with a structure in which the inner surface 12 of the drilled hole 40 of the ceramic substrate 10 is not fractured because the starting and ending points of the penetrating holes are not connected to each other.

In addition, in order to prevent heat loss from the heater unit 30 to the non-perforated portion of the outer surface 11 between the starting and ending points of one drilled hole 40, another drilled hole ( 41) is provided, and the drilling holes 41 thus provided may have a structure that surrounds the existing drilling holes 40 as shown in FIG. 5C, or may have a structure that partially overlaps and is symmetrical as shown in FIG. 5D. As such, this can be considered in various ways for forming the electrode 50.

Such drilled holes (40, 41) have a structure that reduces thermal conductivity by minimizing the adjacent surface of the heater unit (30) and the sensor sensing film (20) with the ceramic substrate (10), and is more robust and easier to integrate than a wire. It has the characteristic of having .

Figure 6 is a side cross-sectional view schematically showing the side structure of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention, and Figure 7 is a side cross-sectional view of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention. It is a state of use diagram (ceramic base installation structure) showing an example of the state of use, and Figure 8 shows another example of the state of use of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention. The diagram shows the state of use (ceramic base removal structure).

6 to 8 are diagrams showing an embodiment of the side structure and usage state of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention. As shown in the drawings, the present invention includes a ceramic substrate 10. It can be mounted on a device that requires a semiconductor alcohol sensor (100) including a CMMS structure provided in an integrated manner, and the device to be mounted can be installed in consideration of abnormalities within the device due to high heat generated from the heater unit (30) located on the bottom. One of the features is that the structure is doubled and has a structure supported by a separate expansion pin 70 so that the ceramic substrate is located at the top.

Therefore, the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention, as an embodiment, includes a ceramic substrate 10 made of a material excellent in wear resistance, heat resistance, corrosion resistance, electrical insulation, and precision processing, and the ceramic substrate ( A drilled hole 40 penetrating the center of 10) by laser processing or a punching machine, the outer surface 11 and the inner surface 12 of the ceramic substrate 10 provided by the drilling hole 40, and the A sensor detection film 20 mounted on the upper part of the inner surface 12, a heater unit 30 mounted on the lower part of the inner surface 12, and an outer surface 11 of the ceramic substrate 10 are formed to electrically An electrode hole 60 through which a signal is transmitted, an electrode 50 joined to the electrode hole 60 and extending to the inner surface 12 of the upper and lower portions of the ceramic substrate 10, and the electrode hole 60 It is equipped with an expansion pin 70 that supplies power to the electrode 50 and transmits an electrical signal.

Such extension pins 70 can be considered to have various lengths depending on the characteristics of the heater unit 30 and the structure of the device, and when extended beyond a certain length, they are expanded to reinforce the flow and rigidity of the ceramic substrate 10. It is characterized in that a separate support base 80 is provided in the middle of the pin 70 (FIG. 7).

Such a support base 80 may be made of a ceramic material, and in some cases, if the rigidity of the ceramic substrate 10 is maintained only with the expansion pins 70, the support base 80 may be omitted (Figure 8).

The material of the ceramic substrate 10 according to the present invention is alumina or ceramic material, which has excellent wear resistance, heat resistance, corrosion resistance, electrical insulation, and precision machinability.

Figure 9 is a plan view (parallel structure) showing another embodiment of the overall configuration of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention, and Figure 10 is a semiconductor type alcohol sensor 100 including the CMMS structure according to the present invention. This is a side view (laminated structure) showing another example of the overall configuration of the alcohol sensor 100.

9 and 10 are diagrams showing the parallel structure and the stacked structure of the semiconductor alcohol sensor 100 including the CMMS structure according to the present invention. As shown in the drawings, the present invention is a semiconductor alcohol sensor 100 using a wire. A plurality of sensor detection films 20 and a plurality of heater units 30 can be provided within the ceramic substrate by providing an integrated ceramic substrate 10 with a perforated hole 41 rather than a bonding structure (FIG. 9). It has certain characteristics, and in some cases, it is possible to integrate them and arrange them in a stacked manner.

To this end, the length of the expansion pin 70 can be extended and the number of perforations of the electrode hole 60 can be added. In addition, the ceramic substrate 10 can be stacked on the extended expansion pin 70 for integration. This stacked semiconductor alcohol sensor (9, 100) can increase the accuracy of alcohol detection, and can be equipped with various types of sensor detection films to detect various types of gases in addition to alcohol, making it highly effective. There is a characteristic.

Figure 11a is a plan view showing the electrode part of the upper part (sensing film) of a ceramic substrate according to the present invention, and Figure 11b is a bottom view showing the electrode part of the lower part of the ceramic substrate (heater part) according to the present invention.

11A and 11B are plan and bottom views showing the upper and lower electrode portions of the ceramic substrate according to the present invention. As shown in the drawing, the ceramic substrate 10 according to the present invention is formed by punching the ceramic substrate and then forming a sensing film electrode (Au, etc.) 51) and the heater unit electrode (Au, etc.) 52 are screen printed, and then the heater unit 30 and the sensor detection film 20 are printed.

In the above process, the screen printing technology used to mount the electrode 50, the heater unit 30, and the sensor sensing film 20 is performed using a normal design method, but in addition to the screen printing method, various methods for forming electrodes such as deposition are used. This can be considered.

The heater unit 30 can be made of platinum (Pt) or ruthenium dioxide (RuO2) and is made in the form of a paste together with the sensor detection film 20. The upper part (sensor detection film) of the ceramic substrate 10 ) and the lower part (heater part) are screen-printed, respectively, and electrodes 50 are disposed between the sensor detection film 20 and the ceramic substrate 10, and between the ceramic substrate 10 and the heater part 30, respectively, to form a ceramic substrate. (10) Power supplied through the above electrode 50 is supplied to the sensor detection film 20 and the heater unit 30 to enable the operation of the semiconductor alcohol sensor 100 including a CMMS structure.

As described above, the first alcohol sensor units 200 and 300 include an electrochemical alcohol sensor 200.

In general, the electrochemical alcohol sensor 200 utilizes the current flowing between the reaction electrode 221 and the corresponding electrode 222 due to the oxidation/reduction reaction occurring in the reaction electrode 221 and the corresponding electrode 222. , In detail, the reaction electrode 221 and the corresponding electrode 222 in which the oxidation/reduction reaction of alcohol occurs, the reaction electrode 221 and the corresponding electrode 222 and the reaction electrode in a state supported on a porous electrolyte carrier 223. It includes a lead wire 230 coupled to the liquid electrolyte placed between 221 and the corresponding electrode 222. Hereinafter, with reference to FIGS. 12 and 13, the electrochemical alcohol sensor 200 according to the present invention will be described in detail.

Figure 12 is a diagram showing one embodiment of the electrochemical alcohol sensor 200 according to the present invention.

Referring to FIG. 12, one embodiment of the electrochemical alcohol sensor 200 according to the present invention is disposed inside the sample gas chamber 210 and the sample gas chamber 210 and serves as a detection unit for measuring alcohol. It includes a lead wire 230 coupled to the cell 220 and the sensing cell 220.

The sample gas chamber 210 accommodates the detection cell 220 and forms a space through which sample gas flows. Meanwhile, the sample gas at this time includes the driver's exhaled gas.

An exhalation inlet 211 and an exhalation outlet 212 for introducing sample gas are formed at the bottom of both sides of the sample gas chamber 210, respectively. The exhalation outlet 212 is connected to the suction pump 240. When the suction pump 240 operates, a fixed amount of sample gas flows into the sample gas chamber 210 through the exhalation inlet 211. The suction pump 240 includes a solenoid actuator 241 and a wrinkle portion 242 that is connected to the plunger of the solenoid actuator 241 and can be contracted and expanded. When power is momentarily applied to the solenoid actuator 241, the plunger of the solenoid actuator 241 retracts and a fixed amount of sample gas flows into the sample gas chamber 210, and the plunger is moved by the return spring of the solenoid actuator 241. As it moves forward, the sample gas in the sample gas chamber 210 is discharged to the outside through the exhalation inlet 211. In this process, the alcohol concentration in the sample gas is measured by measuring the concentration of alcohol adsorbed on the reaction electrode 221 of the sensing cell 220. The detection cell 220 is disposed at the top of the internal space of the sample gas chamber 210.

FIG. 13 is a diagram showing the sensing cell 220 shown in FIG. 12.

Referring to FIG. 13, the sensing cell 220 includes a reaction electrode 221 and a corresponding electrode 222, a porous electrolyte carrier 223 containing a liquid electrolyte, and hydrophobic conductive membranes 224 and 225.

The reaction electrode 221 and the corresponding electrode 222 include electrodes made of high specific surface area porous platinum and noble metal alloy. In detail, the reaction electrode 221 is an electrode where an oxidation reaction of alcohol contained in the sample gas occurs, and may be made of porous platinum black. Platinum black acts as a catalyst and electrode to actively promote the oxidation reaction of alcohol. The reaction electrode 221 may be a porous disk support made of ceramic material such as alumina coated with platinum black. The counter electrode 222 is an electrode where a reduction reaction of alcohol occurs, and, like the reaction electrode 221, may be made of porous platinum black.

The reaction electrode 221 is disposed in the space between the exhalation inlet 211 and the exhalation outlet 212 through which the sample gas flows, and the corresponding electrode 222 is disposed near the upper inner wall of the sample gas chamber 210.

A liquid electrolyte is supported on the porous electrolyte carrier 223. The liquid electrolyte supported on the porous electrolyte carrier 223 includes an acidic liquid electrolyte. For example, an inorganic acid may be used as the liquid electrolyte, such as sulfuric acid, hydrochloric acid, nitric acid, etc.

The hydrophobic conductive membranes 224 and 225 serve to prevent the liquid electrolyte from flowing outward through the reaction electrode 221, electrically connect the reaction electrode 221 and the lead wire 230, and prevent the liquid electrolyte from flowing outward through the reaction electrode 221. It serves to prevent the detection cell 220 from being contaminated by moisture. The hydrophobic conductive membranes 224 and 225 have a porous structure to allow sample gas to pass through. Additionally, the hydrophobic conductive membranes 224 and 225 are hydrophobic to block the movement of liquid electrolyte and moisture, and have oxidation resistance to prevent corrosion by the liquid electrolyte.

The hydrophobic conductive films 224 and 225 may be carbon paper or carbon cloth with a hydrophobic coating layer, and are preferably carbon cloth with high gas permeability. The hydrophobic coating layer is preferably a fluororesin layer. Fluorine resin has excellent water repellency due to its low surface energy, and has excellent thermal stability due to its high melting point. Additionally, it is chemically stable. The coating layer can be formed by dipping carbon paper or carbon cloth in a fluororesin solution, drying it, and heat treating it at a temperature of about 380°C in a nitrogen atmosphere. Additionally, a coating layer can be formed using plasma.

As shown in FIG. 13, the hydrophobic conductive films 224 and 225 are respectively disposed below the reaction electrode 221, above the counter electrode 222, and between the inner wall of the sample gas chamber 210.

A lead wire 230 connected to an external circuit 231 for measuring alcohol concentration is connected to the hydrophobic conductive films 224 and 225. The lead wire 230 may be a copper wire, an aluminum wire, a steel wire, a silver wire, or a copper wire plated with platinum or gold, an aluminum wire, a steel wire, or a silver wire. Conventionally, since the lead wire is directly connected to the reaction electrode 221 and the corresponding electrode 222, which are wetted by the liquid electrolyte, a platinum wire that is not easily corroded by the liquid electrolyte was used as the lead wire, but in the case of the present invention, Since the lead wire 230 is connected to the hydrophobic conductive films 24 and 25 in a dry state, a general conductive wire can be used as the lead wire 230.

The sample gas introduced through the exhalation inlet 211 passes through the hydrophobic conductive membrane 224 below the reaction electrode 221. At this time, moisture such as saliva in the sample gas is blocked by the hydrophobic conductive membrane 224. The alcohol component of the sample gas is adsorbed to the reaction electrode 221 and then oxidized. Ions generated by the oxidation reaction pass through the electrolyte solution and are then used in the reduction reaction at the corresponding electrode 222. Electrons generated by the oxidation/reduction reaction flow to the external circuit 231 through the lead wire 230 connected to the hydrophobic conductive films 224 and 225 connected to the reaction electrode 221 and the corresponding electrode 222 and correspond to the alcohol concentration. generates an electrical signal.

The general electrochemical alcohol sensor 200 described above uses the principle of a fuel cell and uses the principle that the amount of current increases according to the concentration of alcohol by conduction of protons, which are reaction by-products of alcohol. Basically, the electrochemical alcohol sensor (200), unlike the semiconductor alcohol sensor (9, 100), operates at room temperature and has excellent selectivity and accuracy, so the electrochemical alcohol sensor (200) is currently used in all existing drunk driving prevention devices. . However, in the case of low temperatures, the electrical conductivity of protons drops rapidly and the sensitivity also decreases significantly. To solve this problem, a heater wrapped around the outside of the sensor is used to increase the temperature of the sensor. However, because the electrochemical alcohol sensor 200 is large in size and has an external case made of plastic, it has the problem that it takes several minutes or more to prepare for measurement for the sensor heating time.

Therefore, in order to solve these shortcomings at low temperatures, this specification discloses a low-temperature electrochemical alcohol sensor 300 that can output the highest signal possible without heating even at low temperatures.

Meanwhile, based on the principle of the electrochemical alcohol sensor (200, 300), no matter how optimized the alcohol sensor is, it is impossible to achieve perfect accuracy at low temperatures. To solve this, a 2-channel amplification circuit is used to accurately measure blood pressure even with a low sensor response signal at 0℃. We would like to disclose a low-temperature electrochemical alcohol sensor (300) capable of measuring alcohol concentration. In the case of the low-temperature (low-concentration) electrochemical alcohol sensor 300 to be described below, the control unit 360 operates from the first alcohol sensor units 200 and 300, and more specifically, from the electrochemical alcohol sensors 200 and 300. The detected signal is processed using two-channel amplification technology.

Figure 14 is a conceptual diagram schematically showing a breathalyzer measuring device including a low-temperature electrochemical alcohol sensor 300 using a two-channel amplification technology according to the present invention. Meanwhile, in Figure 14, known components included in a general breathalyzer device, such as a fire bowl 310, an exhalation inlet 320, and a sample gas chamber 330, are also shown, and the known components are shown in each embodiment. Depending on the amount, it can be sufficiently added or subtracted. This is the same in the case of the semiconductor-type alcohol sensor (9, 100) described above, and also in the case where the semiconductor-type alcohol sensor (9, 100) and the electrochemical alcohol sensor (200, 300) are provided and operated together.

Referring to FIG. 14, the breathalyzer 1000 including the low-temperature electrochemical alcohol sensor 300 according to the present invention includes an exhalation inlet 320, a sample gas chamber 330 in communication with the exhalation inlet 320, and It includes a suction pump 340 connected to the sample gas chamber 330.

The exhalation inlet 320 is in the form of a cylinder with both ends open. Exhalation inlet 320 A fire belt 310 may be coupled to one end of the exhalation inlet 320. The exhaled breath that flows into the exhalation inlet 320 through the fire belt 310 is discharged to the outside through the exhalation outlet 324 at the other end of the exhalation inlet 320.

A sampling hole 321 is formed in the exhalation inlet 320 to supply a portion of the exhaled breath flowing into the exhalation inlet 320 to the sample gas chamber 330. Most of the exhaled breath flowing into the exhalation inlet 320 is discharged directly to the outside through the exhalation outlet 324, and a portion is supplied to the sample gas chamber 330 through the sampling hole 321. Among the exhaled breath flowing through the exhalation inlet 320, the exhaled breath supplied through the collection hole 321 is called sample gas.

The sample gas chamber 330 is connected to the sampling hole 321 of the exhalation inlet 320 through the sample gas inlet pipe 331. A detection unit 350 is installed inside the sample gas chamber 330. The detection unit 350 outputs a current value that changes depending on the alcohol concentration of the sample gas. As the detection unit 350, an electrochemical alcohol sensor as described above is used.

Figure 15 is a diagram showing the output signal of the detector in normal mode.

As described above, the electrochemical alcohol sensor (200, 300) includes a reaction electrode 221, a corresponding electrode 222, an electrolyte disposed between the reaction electrode 221 and the corresponding electrode 222, and a porous electrolyte carrier ( 223). The alcohol adsorbed on the reaction electrode 221 and decomposed into ions passes through the electrolyte and then moves to the corresponding electrode 222. The current value generated at this time changes with time, as shown in FIG. 15. By integrating the change graph of this current value over time, a detection signal value proportional to the amount of alcohol adsorbed and decomposed on the reaction electrode 221 can be obtained, and the blood alcohol concentration can be determined using this. The integral value is proportional to the amount of alcohol adsorbed on the reaction electrode 221, the amount of adsorbed alcohol is proportional to the alcohol concentration in the sample gas, and the alcohol concentration in the sample gas is proportional to the blood alcohol concentration.

The suction pump 340 serves to introduce a fixed amount of the sample gas blown in by the user through the fire bowl 310 into the sample gas chamber 330 and discharge it from the sample gas chamber 330 again. The suction pump 340 is connected to the sample gas chamber 330 through a connection pipe 333.

Since the suction pump 340 has a sealed structure, if the suction pump 340 is not operating, almost no gas flows into the sample gas chamber 330.

The suction pump 340 operates momentarily at a certain time after the user begins to exhale, flows a fixed amount of sample gas into the sample gas chamber 330, and then immediately releases the sample gas through the sample gas inlet pipe 331. It is discharged from chamber 330.

Whether the user has started to exhale can be confirmed using, for example, a microphone (not shown) or a pressure sensor (not shown) installed at the exhalation inlet 320.

A solenoid pump can be used as the suction pump 340. The solenoid pump includes a housing 341 in which a bobbin (not shown) around which an induction coil is wound is installed, and a plunger 342 installed to move up and down in the hollow of the housing 341. The plunger 342 is connected to the stretchable pleated portion 343.

When power is momentarily applied to the induction coil, the plunger 342 retreats a certain distance and then immediately returns by a return spring (not shown) in the housing 341. In the process of the plunger 342 retreating, the wrinkles 343 expand and sample gas flows into the sample gas chamber 330, and in the process of the plunger 342 returning, the wrinkles 343 contract and the sample gas chamber 330 expands. The sample gas within (330) is discharged through the sample gas inlet pipe (331). By limiting the moving distance of the plunger 342, a fixed amount of sample gas can be collected and a fixed amount of sample gas can be discharged. As the sample gas flows into and out of the sample gas chamber 330, the sample gas is adsorbed to the detection unit 350 disposed in the sample gas chamber 330.

The control unit 360 transmits a control signal to operate the suction pump 340 to the suction pump 340. Additionally, the control unit 360 calculates the blood alcohol concentration value according to the electrical signal value received from the detection unit 350.

As shown in FIG. 16, the control unit 360 includes a mode setting signal receiving unit 361, a control signal generating unit 362, a control signal transmitting unit 363, a memory unit 364, and a blood alcohol concentration calculating unit 365. Includes.

The mode setting signal receiving unit 361 serves to receive the mode setting signal. The user can select between normal mode and low concentration mode through an application installed on a smart device connected to the breathalyzer 1000 or a settings button on the breathalyzer 1000. The normal mode is a mode used when the blood alcohol concentration is relatively high, and the low concentration mode is a mode used when the blood alcohol concentration is low.

The control signal generator 362 serves to generate a first control signal corresponding to the normal mode or a second control signal corresponding to the low concentration mode according to the mode signal received from the mode setting signal receiver 361.

In the normal mode, the suction pump 340 is operated once during the measurement step, and in the low concentration mode, the suction pump 340 is continuously operated multiple times during the measurement step. In the low concentration mode, power is applied to the solenoid actuator of the suction pump 340 multiple times at short intervals, and the suction pump 340 is continuously operated multiple times. When a large amount of sample gas is introduced into the sample gas chamber 330 in this way, the amount of alcohol adsorbed on the detection unit 350 increases, allowing more accurate measurement of blood alcohol concentration even when the blood alcohol concentration is low. There is an advantage in that it can be done.

In addition, in the low concentration mode, before the measurement step, for example, in the preheating step of preheating the detection unit 350 to a temperature suitable for measurement, the suction pump 340 is operated to remove alcohol that may remain in the sample gas chamber 330. Remove.

The control signal transmitting unit 363 serves to transmit the first control signal or the second control signal generated by the control signal generating unit 362 to the suction pump 340.

The memory unit 364 contains a first reference value of the output signal of the detection unit 350 obtained using a high-concentration standard gas, and a second reference value of the output signal of the detection unit 350 obtained using a low-concentration standard gas. This is saved. For accurate measurement, different reference values are used in low concentration mode and normal mode.

The first reference value can be obtained by measuring in normal mode using a high-concentration standard gas corresponding to a set blood alcohol concentration as a sample gas. That is, a value obtained by integrating the current value output from the detection unit 350 (see FIG. 15) over time after operating the suction pump 340 once in a high-concentration standard gas atmosphere becomes the first reference value.

Figure 17 is a diagram showing the output signal of the detection unit in low concentration mode.

The second reference value can be obtained by measuring in low concentration mode using a low concentration standard gas as a sample gas. That is, the current value output from the detection unit 350 (see FIG. 17) after operating the suction pump 340 multiple times, for example, 3 times in a low concentration standard gas atmosphere, is the value integrated over time. 2 becomes the standard value. As shown in FIG. 17, the current value increases each time the suction pump 340 is operated.

For example, the second reference value can be set using a standard gas corresponding to 0.005BAC%, and the first reference value can be measured using a standard gas corresponding to 0.050BAC%. The standard gas corresponding to 0.005BAC% may be a gas generated by an alcohol solution that has the same effect as 0.005BAC%.

The blood alcohol concentration calculation unit 365 compares the time-integrated current value received from the detection unit 350 with the first or second reference value stored in the memory unit 364 depending on the mode to determine the blood alcohol level. Calculate concentration.

In normal mode, the blood alcohol concentration is calculated based on the first reference value, and in low concentration mode, the blood alcohol concentration is calculated based on the second reference value.

For example, if the first reference value obtained using a standard gas corresponding to 0.050BAC% is a and the integral value measured in normal mode is 0.5a, the blood alcohol concentration is 0.025BAC, which is 0.5 × 0.050BAC%. It can be calculated as a percentage. In the same way, if the second reference value obtained using the standard gas corresponding to 0.005BAC% is b and the integrated value measured in low concentration mode is 0.5b, the blood alcohol concentration is 0.0025BAC, which is 0.5 × 0.005BAC%. It can be calculated as a percentage.

The blood alcohol concentration value calculated by the blood alcohol concentration calculation unit 365 is displayed on the display unit 370.

Figure 18 is a flowchart showing the flow of a breathalyzer test method using a sensor fusion-based breathalyzer device according to the present invention.

A method of measuring alcohol intake using a sensor fusion-based breathalyzer device according to the present invention will be described with reference to FIG. 18 as follows.

The breathalyzer test method using a sensor fusion-based breathalyzer device according to the present invention includes the temperature sensor unit 500 measuring the temperature inside the vehicle (S200) and the control units 360 and 400 measuring the temperature sensor unit 500. It includes a step (S300) of controlling the first alcohol sensor units 200, 300 or the second alcohol sensor units 9, 100 to operate alternatively based on the temperature measured.

More specifically, before step S200, the control units 360 and 400 connected to the vehicle's self-diagnosis unit (On-board diagnostics, OBD) and LIN (Local Interconnect Network) communication or CAN (Controller Area Network) communication perform self-diagnosis. The vehicle's door opening is detected by receiving the vehicle's door opening measurement value from the unit, and when the control unit (360, 400) detects the vehicle's door opening, the first alcohol sensor unit (200, 300) and the second alcohol sensor It further includes controlling at least one of the units 9 and 100 to warm up (S100). Therefore, the preparation time for the first alcohol sensor units (200, 300) and the second alcohol sensor units (9, 100) can be shortened.

When the temperature sensor unit 500 measures the temperature inside the vehicle in step S200, as described above, not only the temperature inside the vehicle but also the first alcohol sensor unit 200, 300 and/or the second alcohol sensor unit 9 , 100), and more specifically, the temperature of the sensing units (1, 20, 220, 350) of each alcohol sensor (9, 100, 200, 300) can be measured.

In step S300, the control unit 360 or 400 selects the first alcohol sensor unit 200 or 300 or the second alcohol sensor unit 9 or 100 based on the temperature measured by the temperature sensor unit 500. In this case, in step S300, as an example, when the measured temperature in the vehicle is 0°C or higher, the control units 360 and 400 control the first alcohol sensor units 200 and 300 to operate. And, when the measured temperature in the vehicle is less than 0°C, the control units 360 and 400 may control the second alcohol sensor units 9 and 100 to operate.

If alcohol is detected in the first alcohol sensor unit (200, 300) and/or the second alcohol sensor unit (9, 100) in step S400, the control unit (360, 400) turns on the ignition lock device as described above. By operating it, you can control it so that the vehicle does not start. That is, the control unit (360, 400) operates the key box, key module, etc. only when alcohol is not detected from the first alcohol sensor unit (200, 300) and/or the second alcohol sensor unit (9, 100) after the breathalyzer test. This allows you to control the vehicle to start.

The smart device according to the present invention is a terminal such as a desktop PC, laptop PC, tablet PC, or smartphone equipped with an input means such as a keyboard, mouse, touchpad, or touch screen, and a display screen, but is not limited thereto, and is a communication network device. Any configuration that can process digital information can be included, allowing access to the server through, inputting search information and selection information, and installing an application program that can display search result information. The smart device according to the present invention is a component that connects to a server through a communication network to transmit and receive information, for example, a smartphone, tablet personal computer, mobile phone, video phone, and desktop PC. (desktoppersonal computer), laptop PC (laptop personal computer), netbook computer, personal digital assistant (PDA), portable multimedia player (PMP), wearable device (e.g. smart glasses, head-worn device) It may include at least one of (head-mounted-device (HMD), etc.), unmanned terminal (kiosk), or smart watch).

A smart device and a server according to the present invention can communicate through a communication unit and communication network provided by each. A communication network refers to a connection structure that allows information exchange between nodes such as terminals and servers. Examples of such communication networks include the 3rd Generation Partnership Project (3GPP) network, Long Term Evolution (LTE) network, and 5G. Network, WIMAX (World Interoperability for Microwave Access) network, Internet, LAN (Local Area Network), Wireless LAN (Wireless Local Area Network), WAN (Wide Area Network), PAN (Personal Area Network), wifi network, It includes, but is not limited to, a Bluetooth network, satellite broadcasting network, analog broadcasting network, and DMB (Digital Multimedia Broadcasting) network. The communication unit provided by each smart device and the server may include electronic components provided for the communication network so as to perform wired and wireless data communication through the above-described communication network.

The memory unit according to the present invention may include a database management system (hereinafter referred to as DBMS). DBMS is a set of software tools that allow multiple users to access data in memory. DBMS includes IMS, CODASYL DB, DB2, ORACLE, INFORMIX, SYBASE, INGRES, MS-SQL, Objectivity, O2, Versanat, Ontos, Gemstone, Unisql, Object Store, Starburst, Postgres, Tibero, MySQL or MS-access. can do. DBMS allows access to specific data depending on the input of a specific command.

In this specification, the control unit 360 and each component 361, 362, 363, 364, and 365 of the control unit 360 may be processors that execute sequential execution processes stored in memory. Alternatively, they may operate as software modules driven and controlled by a processor. Furthermore, a processor may be a hardware device.

For reference, the breath alcohol test method using a sensor fusion-based breath alcohol test device according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be those specifically designed and constructed for the present invention, or may be known and usable by those skilled in the art of computer software. Examples of computer readable media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and ROM, RAM, Hardware devices specifically configured to store and perform program instructions, such as flash memory, may be included. Examples of program instructions include not only machine code such as that created by a compiler, but also high-level language code that can be executed by a computer using an interpreter, etc. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In this specification, 'part' includes a unit realized by hardware, a unit realized by software, and a unit realized using both. Additionally, one unit may be realized using two or more pieces of hardware, and two or more units may be realized using one piece of hardware.

The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is to be added once again that the scope of protection of the present invention may not be limited due to changes or substitutions that are obvious in the technical field to which the present invention pertains.

1: Sensor chip 1a: Electrode pad 1b: Heater unit
2: Stem 2a: Stem supporter 3: Stampin
3a: Stem head 4: Wire
9: General semiconductor alcohol sensor
9, 100: 2nd alcohol sensor unit
10: substrate 11: outer side 12: inner side
20: Sensor detection film 30: Heater unit 40: Perforated hole
41: perforated hole 50: electrode 51: sensing membrane electrode
52 ; Heater electrode 60: Electrode hole 70: Extension pin
80: support base
100: Semiconductor alcohol sensor including CMMS structure
200, 300: 1st alcohol sensor unit
210: sample gas chamber 211: exhalation inlet 212: exhalation outlet
220: Sensing cell 221: Reaction electrode 222: Corresponding electrode
223: porous electrolyte carrier 224, 225: hydrophobic conductive membrane
230: Lead wire 240: Suction pump
241: solenoid actuator 242: wrinkle part
200: General electrochemical alcohol sensor
310: Buddha 320: Exhalation passage 330: Sample gas chamber
331: sample gas inlet pipe 333: connection pipe 340: suction pump
342: Plunger 343: Crease 350: Sensing part
360: Control unit 361: Mode setting signal receiving unit
362: Control signal generator 363: Control signal transmitter
364: memory unit 365: blood alcohol concentration calculation unit
370: display unit
300: Electrochemical alcohol sensor using 2-channel amplification technology
360, 400: Control unit 500: Temperature sensor unit
211, 320: exhalation inlet 212, 324: exhalation outlet
1, 20, 220, 350: Sensing part 1b, 30: Heater part
1000: Breathalyzer

Claims (12)

In a sensor fusion-based breathalyzer measuring device installed in a vehicle and including a temperature sensor unit, a first alcohol sensor unit, a second alcohol sensor unit, and a control unit,
The temperature sensor unit measures the temperature inside the vehicle,
The control unit controls the first alcohol sensor unit or the second alcohol sensor unit to operate alternatively based on the temperature measured by the temperature sensor unit,
The first alcohol sensor unit includes an electrochemical alcohol sensor, the second alcohol sensor unit includes a semiconductor alcohol sensor, and the first alcohol sensor unit and the second alcohol sensor unit are optimal for measuring an alcohol detection signal. The temperatures are different,
The control unit causes the electrochemical alcohol sensor to operate when the temperature measured by the temperature sensor unit is 0°C or higher,
The control unit causes the semiconductor alcohol sensor to operate when the temperature measured by the temperature sensor unit is less than 0°C,
The control unit primarily operates the semiconductor alcohol sensor when the temperature measured by the temperature sensor unit is less than 0°C, and secondarily operates the electrochemical alcohol sensor when alcohol is detected by the semiconductor alcohol sensor. Make the sensor work,
The control unit, when performing the first breath alcohol measurement through the semiconductor alcohol sensor, operates the heater unit of the electrochemical alcohol sensor to heat the electrochemical alcohol sensor, and while the electrochemical alcohol sensor is being heated, the semiconductor alcohol sensor A sensor fusion-based breathalyzer measuring device, characterized in that the driver's waiting time can be reduced during the measurement preparation time of the electrochemical alcohol sensor by first performing the first breathalyzer test through. delete delete delete In claim 1,
The control unit is a sensor fusion-based breathalyzer device characterized in that it controls at least one of the first alcohol sensor unit and the second alcohol sensor unit to warm up when an open door of the vehicle is detected. In claim 1,
The control unit is a sensor fusion-based breathalyzer that operates the ignition lock device when the first alcohol sensor unit or the second alcohol sensor unit detects alcohol. In claim 1,
The semiconductor alcohol sensor is a sensor fusion-based breathalyzer measuring device, characterized in that it includes a ceramic substrate. In claim 1,
The semiconductor alcohol sensor is a sensor fusion-based breathalyzer measuring device, characterized in that it includes a CMMS (Ceramic Micro-Machined Structure) structure. In claim 1,
The electrochemical alcohol sensor is a sensor fusion-based breathalyzer measuring device, characterized in that it includes an acidic liquid electrolyte and a porous electrolyte carrier. In claim 1,
The electrochemical alcohol sensor is a sensor fusion-based breathalyzer measuring device, characterized in that it includes electrodes made of high specific surface area porous platinum or precious metal alloy. In claim 1,
The control unit is a sensor fusion-based breathalyzer measuring device, characterized in that the signal detected from the electrochemical alcohol sensor is processed using two-channel amplification technology. A first step in which the temperature sensor measures the temperature inside the vehicle; and
A second step in which the control unit controls the first alcohol sensor unit or the second alcohol sensor unit to operate alternatively based on the measured temperature,
In the second step,
The first alcohol sensor unit includes an electrochemical alcohol sensor, the second alcohol sensor unit includes a semiconductor alcohol sensor, and the first alcohol sensor unit and the second alcohol sensor unit are optimal for measuring an alcohol detection signal. The temperatures are different,
In the second step,
The control unit causes the electrochemical alcohol sensor to operate when the temperature measured by the temperature sensor unit is 0°C or higher,
The control unit causes the semiconductor alcohol sensor to operate when the temperature measured by the temperature sensor unit is less than 0°C,
The control unit primarily operates the semiconductor alcohol sensor when the temperature measured by the temperature sensor unit is less than 0°C, and secondarily operates the electrochemical alcohol sensor when alcohol is detected by the semiconductor alcohol sensor. Make the sensor work,
The control unit, when performing the first breath alcohol measurement through the semiconductor alcohol sensor, operates the heater unit of the electrochemical alcohol sensor to heat the electrochemical alcohol sensor, and while the electrochemical alcohol sensor is being heated, the semiconductor alcohol sensor A breathalyzer test method using a sensor fusion-based breathalyzer device, characterized in that the driver's waiting time can be reduced during the measurement preparation time of the electrochemical alcohol sensor by first performing a first breathalyzer test through.