CN203405242U - Detection circuit used for ultrasonic gas meter and ultrasonic gas meter thereof - Google Patents
Detection circuit used for ultrasonic gas meter and ultrasonic gas meter thereof Download PDFInfo
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- CN203405242U CN203405242U CN201320549931.8U CN201320549931U CN203405242U CN 203405242 U CN203405242 U CN 203405242U CN 201320549931 U CN201320549931 U CN 201320549931U CN 203405242 U CN203405242 U CN 203405242U
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Abstract
The utility model provides a detection circuit used for an ultrasonic gas meter and the ultrasonic gas meter thereof. The detection circuit comprises a detection circuit module, a processor module, a sensor control module, a signal regulating and processing module and a display module; the output end of the detection circuit module is connected with the input end of the sensor control module, the output end of the sensor control module is connected with the input end of the signal regulating and processing module, and the input end of the signal regulating and processing module is connected to the detection circuit module in a feedback mode. The processor module is connected with the sensor control module, the detection circuit module, the signal regulating and processing module and the display module respectively; the sensor control module is further connected with an upstream ultrasonic sensor and a downstream ultrasonic sensor. The utility model further provides the ultrasonic gas meter using the detection circuit. The ultrasonic gas meter solves the problem that ultrasonic combustion detection accuracy and broadening of gas runners are inconsistent, and detection accuracy of the ultrasonic gas meter is improved under the precondition that the size and quality of an existing gas meter are not increased.
Description
Technical Field
The utility model relates to a gas meter technical field, concretely relates to a detection circuitry for ultrasonic wave gas table and ultrasonic wave gas table thereof.
Background
In the prior art, the current commonly used household gas meter is mainly a membrane gas meter, and the metering precision of the gas meter is greatly influenced by temperature and pressure. Along with the development of science and technology, ultrasonic wave gas table arises at the same time of fortune, and it adopts novel measurement technique, compares with traditional gas table, has contactless measured medium, and the precision is high, and stability is good, wide range ratio characteristic, simple structure, mechanical movable part are few, small, advantages such as light in weight.
For example: CN101629838 discloses an ultrasonic gas meter, which comprises a meter body, wherein an ultrasonic detection device is arranged in the meter body, and the ultrasonic detection device comprises a main control module, a data acquisition module, a display module, a power supply module, a first ultrasonic sensor and a second ultrasonic sensor; the first ultrasonic sensor and the second ultrasonic sensor are connected with the data acquisition module and are respectively arranged at the upstream and the downstream of a gas flow path in a pipeline cavity of the meter body, and the first ultrasonic sensor and the second ultrasonic sensor are respectively used for transmitting ultrasonic signals to each other and receiving the ultrasonic signals of each other; the data acquisition module is used for acquiring signals received by the ultrasonic sensor I and the ultrasonic sensor II, converting the signal data into digital quantity and transmitting the digital quantity to the main control module; the display module is connected with the main control module and used for displaying flow information and alarm information of the gas meter; the main control module is used for processing the data transmitted by the data acquisition module, obtaining the flow of the fuel gas and controlling the display of the display module. The ultrasonic detection device is arranged in the gas meter to detect the flow of gas and display the flow on the display module, and the whole ultrasonic detection device is mostly integrated on one circuit board, so that the gas meter has the characteristics of small volume and light weight. The gas flow passage of the gas meter is horizontally provided with a plurality of layers of clapboards, the clapboards are arranged to enable the gas flow passage to flow in the leakage liquid with relatively same resistance as much as possible, the flowing speed is relatively uniform, and the accuracy of flow detection is improved.
In order to improve the measurement accuracy of the ultrasonic gas meter, the conventional ultrasonic gas meter generally adopts a means of widening a gas flow channel and increasing the detection time difference between an upstream ultrasonic sensor and a downstream ultrasonic sensor, so that the influence of errors on the measurement accuracy is reduced. Although the method of widening the gas flow passage can improve the detection precision to a certain extent, the widening of the gas flow passage can correspondingly increase the volume and the weight of the gas meter, thereby occupying larger space during installation and causing the installation to be very inconvenient. Further, since the transmission speed of the ultrasonic wave is high, the increase amount of the detection time difference by widening the gas flow passage is limited, and the increase amount of the detection accuracy is also limited.
SUMMERY OF THE UTILITY MODEL
The aforesaid that exists to prior art is not enough, the utility model aims at on current basis, further improves the detection precision of ultrasonic wave gas table, avoids improving through widening the gas flow channel, and provides a high accuracy detection circuitry for ultrasonic wave gas table.
The utility model also provides an ultrasonic wave gas table solves the ultrasonic wave and fires measurement accuracy and widen the gas flow way and have the problem of contradiction, under the prerequisite that does not increase current gas table volume and quality, improves the detection precision of ultrasonic wave gas table, still provides multiple intelligent function.
Realize above-mentioned purpose, the utility model discloses a following technical scheme: a detection circuit for an ultrasonic gas meter is characterized by comprising a measurement circuit module, a processor module, a sensor control module, a signal conditioning module and a display module; the output end of the measuring circuit module is connected with the input end of the sensor control module, the output end of the sensor control module is connected with the input end of the signal conditioning module, and the input end of the signal conditioning module is fed back to the measuring circuit module; the processor module is respectively connected with the sensor control module, the measuring circuit module, the signal conditioning module and the display module; the sensor control module is also connected with a sensor module, the sensor module is provided with a signal detection end and is arranged in a gas flow channel of the meter body, and the sensor module comprises an upstream ultrasonic sensor and a downstream ultrasonic sensor; the upstream ultrasonic sensor and the downstream ultrasonic sensor respectively transmit ultrasonic signals to each other and receive ultrasonic signals of each other; the signal conditioning module comprises a matching circuit, a filter circuit and an amplifying circuit which are connected in sequence; the signal output end of the sensor module is in communication connection with the input end of the matching circuit, and the signal output end of the amplifying circuit is in communication connection with the signal input end of the measuring circuit module.
Preferably, the display module is an LCD display and is used for displaying the gas flow, the instantaneous flow, the accumulated flow, the power supply voltage state, the gas flow direction state and the alarm information of the ultrasonic gas meter.
And as optimization, the processor module is also connected with a valve driving module, and the valve driving module is connected with a valve of the gas meter.
As optimization, the processor module is further connected with a wireless M-BUS module 50, and the wireless M-BUS module is used for transmitting the natural gas meter reading data to a gas company.
And as optimization, the processor module is also connected with an IC card read-write module.
As optimization, the processor module is further connected with an anti-theft monitoring module.
As an optimization, the processor module is further connected with a temperature compensation module, and the temperature compensation module is used for calibrating the gas flow according to temperature changes.
And as optimization, the processor module is also connected with an IRDA infrared communication module.
The ultrasonic gas meter comprises a shell, a gas flow channel and an ultrasonic detection circuit; the cross section of the gas flow channel is of a rectangular structure, the length of the rectangular structure is 15 mm-300 mm, the width of the rectangular structure is 3 mm-100 mm, and the ultrasonic detection circuit of the ultrasonic gas meter adopts any one of the technical schemes.
As the optimization of the ultrasonic gas meter, an alkaline battery box and a communication interface are arranged outside the shell.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model discloses a detection circuitry for ultrasonic gas table, measurement circuit module sends the pulse and gives sensor module for sensor control module drive wherein upstream sensor signals, when the signal reachs to low reaches sensor, sensor control module then controls low reaches sensor received signal, then signal transmission to signal conditioning module, through the matched filter, obtain clear ultrasonic signal transmission to measurement circuit module after enlargiing, measurement circuit measures the following current time that the ultrasonic wave reachd. The sensor control module can switch the transceiving state of the upstream and downstream sensors, so that the upstream and downstream time of the ultrasonic signal can be obtained, the measuring circuit transmits the upstream and downstream time to the processor module, and the flow volume converted by the processor module is displayed on the LCD display module through calculation and conversion. The method has the characteristics of high precision, stability and good reliability.
2. Adopt the utility model discloses detection circuitry is used for ultrasonic wave gas table, has non-contact measurement, does not have mechanical wear and installs simple characteristics. Due to the adoption of the detection circuit, the means for reducing detection errors in the prior art is changed, and the width of a gas flow channel is not required to be increased, so that the volume and the weight of the gas meter are reduced, and the gas meter is more convenient to install. The method has the advantages of easy production, strong expansibility and convenient system upgrade.
3. The utility model provides an ultrasonic gas meter avoids using multilayer partition because the gas flow path has adopted the cross section to be the rectangle structure, makes the simple structure of gas flow path, and manufacturing procedure is simple, has still reduced mechanical parts simultaneously and has lacked to reduce ultrasonic gas meter's small on the whole, alleviateed its weight,
4. When an earthquake or building vibration occurs, the vibration module in the gas meter can be displayed on the display screen and can give out buzzing warning.
5. The wireless M-BUS module can realize the wireless meter reading function of the handheld equipment of the gas company, and the IC card module can realize the prepayment function.
6. Data encryption is carried out when the gas meter transmits information with the outside, and the safety and the privacy of a user are guaranteed.
7. Wireless firmware upgrading can be realized through the IRDA infrared communication module, and a gas company can perform software upgrading on internal functions of the gas meter in a remote wireless mode.
Drawings
Fig. 1 is the utility model is a schematic block diagram for ultrasonic wave gas table detection circuitry, wherein, A and B indicate upstream ultrasonic sensor and low reaches ultrasonic sensor respectively.
Fig. 2 is a schematic block diagram of a specific embodiment of the utility model for an ultrasonic wave gas table detection circuit.
Fig. 3 is a schematic view of an ultrasonic gas meter gas flow channel and a sensor.
In the figure, the gas flow channel comprises a gas flow channel body 1, a gas flow channel 2, a first mounting hole 4, a large mounting hole 41, a small mounting hole 42, a second mounting hole 5, a main control module 10, a processor module 11, a sensor control module 12, a signal trigger module 13, a measurement circuit module 14, a signal conditioning module 15, an amplifying circuit 151, a filter circuit 152, a matching circuit 153, a sensor module 20, a display module 30, a valve driving module 31, a wireless M-BUS module 32, an IC card read-write module 33, an anti-theft monitoring module 34, a power management module 35, a temperature compensation module 36 and an IRDA infrared communication module 37.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a detection circuit for an ultrasonic gas meter includes a measurement circuit module 14, a processor module 11, a sensor control module 12, a signal conditioning module 15, and an LCD display module 30; the output end of the measuring circuit module 14 is connected with the input end of the sensor control module 12, the output end of the sensor control module 12 is connected with the input end of the signal conditioning module 15, and the input end of the signal conditioning module 15 is fed back to the measuring circuit module 14; the processor module 11 is respectively connected with the sensor control module 12, the measuring circuit module 14, the signal conditioning module 15 and the LCD display module 30; the sensor control module 12 is also connected with an upstream sensor and a downstream sensor; the signal conditioning module 15 includes a matching circuit 153, a filtering circuit 152, and an amplifying circuit 151.
The measurement circuit module 14 sends a pulse to the sensor module 20, so that the sensor control module 12 drives the upstream sensor to send a signal, when the signal reaches the downstream sensor, the sensor control module 12 controls the downstream sensor to receive the signal, then the signal is transmitted to the signal conditioning module 15, a clear ultrasonic signal obtained after matched filtering and amplification is transmitted to the measurement circuit module 14, and the measurement circuit module 14 measures the downstream time of the arrival of the ultrasonic wave. The sensor control module 12 can switch the transceiving state of the upstream and downstream sensors, so as to obtain the upstream and downstream time of the arrival of the ultrasonic signal, the measurement circuit module 14 transmits the upstream and downstream time to the processor module 11, and the flow volume converted by the calculation and conversion processor module 11 is displayed on the LCD display module 30. The method has the characteristics of high precision and good stability.
Example 1:referring to fig. 2, a detection circuit for an ultrasonic gas meter, a packetThe system comprises a main control module 10, a sensor module 20, a display module 30, a valve driving module 31 and a power management module 35; the main control module 10 is in communication connection with the sensor module 20 and the display module 30, respectively, and the display module 30 is an LCD display, and mainly displays: flow information, instantaneous and cumulative flow, power supply voltage status, gas flow direction status, alarm information, etc.
The main control module 10 is composed of a processor module 11, a sensor control module 12, a signal trigger module 13, a measurement circuit module 14 and a signal conditioning module 15; the processor module 11 is respectively in communication connection with the sensor control module 12, the signal trigger module 13 and the measurement circuit module 14, and the processor module 11 is used for sending an ultrasonic signal receiving and sending switching control instruction to the sensor control module 12 and sending an ultrasonic trigger signal control instruction to the signal trigger module 13; the processor module 11 is further configured to control the power management module 35 to supply power to each module in the ultrasonic testing apparatus, where the power is supplied only when each module is working, and the power is dormant when the module is not working. The processor module 11 is provided with a function of storing metering data.
The sensor module 20 has a signal detection end and is arranged in the gas flow passage 2 of the meter body, the sensor module 20 comprises an upstream ultrasonic sensor and a downstream ultrasonic sensor, detection probes of the upstream ultrasonic sensor and the downstream ultrasonic sensor are respectively arranged at the upstream and the downstream of the gas flow path in the gas flow passage 2 of the meter body, and the upstream ultrasonic sensor and the downstream ultrasonic sensor respectively transmit ultrasonic signals to each other and receive ultrasonic signals of the other. The sensor module 20 also has a control signal input, a trigger signal input and a signal output; the control signal output end of the sensor control module 12 is in communication connection with the control signal input end of the sensor module 20, and the sensor control module 12 is configured to send an ultrasonic signal transceiving switching control instruction to the sensor module 20.
The trigger information output end of the signal trigger module 13 is in communication connection with the trigger signal input end of the sensor module 20, and the signal trigger module 13 is configured to send an ultrasonic trigger signal to the sensor module 20.
The signal conditioning module 15 comprises a matching circuit 153, a filter circuit 152 and an amplifying circuit 151 which are sequentially connected in a communication manner, wherein a signal output end of the sensor module 20 is connected with an input end of the matching circuit 153 in a communication manner, and a signal output end of the amplifying circuit 151 is connected with a signal input end of the measuring circuit module 14 in a communication manner.
The utility model relates to a matching circuit 153, filter circuit 152, amplifier circuit 151, signal trigger module 13, measuring circuit module 14 and processor module 11 all can adopt current mature technique, not the utility model discloses an innovation part. The processor module 11 adopts a single chip microcomputer in the prior art. The algorithm and program adopted by the single chip microcomputer are all in the prior art. The present invention does not relate to an improvement of the algorithm. The measurement circuit module 14 can perform its function using the disclosure of the prior art.
The processor module 11 is connected with a valve driving module 31, the valve driving module 31 is connected with a valve of the gas meter, and when the gas meter detects that the gas flow is abnormal or the voltage of the power management module 35 is under-voltage, the processor module 11 controls the valve to close the ventilation pipeline through the valve driving module 31 to stop supplying gas; when the gas flow and the power supply voltage are recovered to normal, the processor module 11 controls the valve to open the ventilation pipeline to recover gas supply.
Further, the processor module 11 is also connected with a wireless M-BUS module 32, and the wireless M-BUS module 32 is used for transmitting the natural gas meter reading data to a gas company.
Further, the processor module 11 is also connected with an IC card read/write module 33. The IC card read/write module 60 is used for information transmission between the IC card and the gas meter, so that a user can pay gas fee in advance through a gas company, then the gas company writes fee payment information into the IC card, and the user realizes the on-off of gas through information exchange between the IC card and the gas meter, thereby realizing the prepayment function of the gas meter.
Further, the processor module 11 is also connected with an anti-theft monitoring module 34. When the gas meter is abnormal, or power failure or insufficient gas storage capacity occurs, or a person detaches the gas meter, or a building installed with the gas meter vibrates, or an earthquake occurs, the processor module 11 controls the anti-theft monitoring module 34 to send out buzzer alarm sound to prompt a user to pay attention.
Further, the processor module 11 is further connected with a temperature compensation module 36, and the temperature compensation module 36 is used for calibrating the gas flow according to temperature changes. Because many factors can influence the detection result in the actual gas flow monitoring process, wherein the influence of the temperature on the detection result is the largest, for this reason, a temperature compensation module 36 is further connected to the processor module 11, so as to reduce the influence of the temperature change on the gas flow detection accuracy as much as possible. A compensation high temperature T is arranged in the temperature compensation modulemaxAnd compensate for low temperature TminWhen it is detected that the temperature of the gas entering the gas flow passage 2 is higher than TmaxOr below TminDuring the process, the temperature compensation module sends a compensation signal to the processor module 11, and after the processor module 11 receives the compensation signal, the compensation calibration is performed on the detected gas flow according to the formula (5).
Wherein Q1In order to correct the flow rate at a later time,Qis the flow value calculated according to equation (4),KandBto correct the parameters, whereinKAndBtwo groups, one group is when the temperature of the inlet gas channel 2 is higher than TmaxWhen the temperature of the gas introduced into the gas flow passage 2 is lower than Tmin(ii) is (i) time; in particular toKAndBcan be determined during the verification of the gauge, detecting when the temperature of the gas entering the gas channel 2 is higher than TmaxWhen, or when, the temperature of the gas entering the gas channel 2 is lower than TminDuring the process, a plurality of groups of different gas flows are respectively input into the gas meter, a plurality of groups of theoretical calculated values are measured, and after actual values and theoretical calculated values of the plurality of groups of gas flows are obtained, the gas meter can be communicatedDetermining two optimal sets of correction parameters by using least square method or curve fitting methodKAndBthe value of (c).
In specific implementation, when the temperature compensation module 36 detects that the temperature of the gas entering the gas channel 2 is higher than TmaxOr below TminThe processor module 11 then selects the correction parameters according to the received supplementary signalKAndBthe flow rate is corrected according to equation (5).
Further, the processor module 11 is also connected with an IRDA infrared communication module 37. The IRDA infrared communication module 37 is used to transmit data to other external components and the processor by infrared rays, and implement wireless upgrade of other firmware connected to the processor in the gas meter under the control of the processor, and the gas company can also perform software upgrade on the software algorithm and the like in the gas meter, such as the processor module 11.
In order to prevent the leakage of the information of a gas meter user when the gas meter is in data communication with a gas company or other equipment, the AES data encryption technology is adopted to encrypt the output data of the gas meter.
Example 2:as shown in fig. 3, an ultrasonic gas meter includes a housing, a gas flow passage 2, and an ultrasonic sensor, and an ultrasonic detection circuit in embodiment 1 is provided in the housing. Be equipped with gas flow channel body 1 in the casing, the one end of runner body 1 is provided with circular shape inlet port, and the other end is provided with the venthole, and the inlet port communicates through setting up at the inside gas flow channel of runner body 1 with the venthole, and the diameter of inlet port is between 15mm ~80mm, and gas flow channel 2's cross section is the rectangle structure, and the length of this rectangle structure is 15mm ~300mm, and the width is 3mm ~100mm, and the area is at 45 square millimeters (mm ~100 mm), and the area is2) To 30000 square millimeters (mm)2) To (c) to (d); the diameter of the air inlet hole is between 15mm and 80mm, and the ratio of the area of the air inlet hole to the cross section area of the gas flow passage is between 0.1 and 1; the cross-sectional area of the gas flow passage is related to the area of the circular gas inlet hole, so that the gas flow is ensured to pass through the flow passage at a proper speed without forming turbulence and vortex, and the measurement is ensuredAnd (4) measuring accuracy. The shell is externally provided with an alkaline battery box and a communication interface. Placing the alkaline battery case outside the housing facilitates easier installation and removal.
The two sides of the gas flow channel 2 are correspondingly provided with a first mounting hole 4 and a second mounting hole 5 for mounting an upstream ultrasonic sensor and a downstream ultrasonic sensor, and the mounting holes are of stepped hole structures. The alkaline battery box and the communication interface are arranged outside the shell, so that the battery is easy to replace and the communication debugging is easy. Wherein, the first mounting hole 4 and the second mounting hole 5 of the gas channel 2 are both of a stepped hole structure, the outer mounting large hole 41 is arranged on the outer side, the inner mounting small hole 42 is arranged on the inner side, the outer mounting large hole 41 is used for mounting an upstream ultrasonic sensor, the inner mounting small hole 42 allows ultrasonic waves to pass through when the upstream ultrasonic sensor transmits the ultrasonic waves, the downstream ultrasonic sensor is mounted in the outer mounting large hole 41 of the second mounting hole 5, the center lines of the first mounting hole 4 and the second mounting hole 5 are overlapped, the connecting line of the center lines is the line A-A shown in figure 3 and the included angle beta between the center line A and the center line B of the gas channel 2 (the line B-B shown in the figure), the detection ends of the upstream ultrasonic sensor and the downstream ultrasonic sensor are respectively arranged at the upstream and the downstream of the gas channel 2 gas flow path of the watch body, the upstream ultrasonic sensor transmits the ultrasonic, the time of the ultrasonic wave received by the downstream ultrasonic sensor isT 1 ， T 1 That is, the transit time of the ultrasonic wave from upstream to downstream, the measurement circuit module 14 can be calculated by the formula (1); in the opposite direction, the downstream ultrasonic sensor sends out ultrasonic waves to the upstream ultrasonic sensor, and the time for receiving the ultrasonic waves by the upstream ultrasonic sensor isT 2 ，T 2 That is, the transit time of the ultrasonic wave from downstream to upstream, the measurement circuit module 14 is calculated by equation (2).
Wherein,Lis the propagation distance of the ultrasonic wave between the upstream ultrasonic sensor and the downstream ultrasonic sensor,C the propagation velocity of the ultrasonic wave in the gas flow channel 2 when no gas flows is shown.
Obtained according to formula (1) and formula (2)T 1 AndT 2 ，the processor module 11 can calculate the gas flow rate U in the gas channel 2 by the formula (3):
if the sectional area of the gas flow channel 2 is S and the gas flow time is T, the processor module 11 can calculate the flow Q of the gas meter by the formula (4):
finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the applicant has described the present invention in detail with reference to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A detection circuit for an ultrasonic gas meter is characterized by comprising a measurement circuit module (14), a processor module (11), a sensor control module (12), a signal conditioning module (15) and a display module (30); the output end of the measuring circuit module (14) is connected with the input end of the sensor control module (12), the output end of the sensor control module (12) is connected with the input end of the signal conditioning module (15), and the input end of the signal conditioning module (15) is fed back to the measuring circuit module (14);
the processor module (11) is respectively connected with the sensor control module (12), the measuring circuit module (14), the signal conditioning module (15) and the display module (30);
the sensor control module (12) is also connected with a sensor module (20), the sensor module (20) is provided with a signal detection end and is arranged in a gas flow channel (2) of the meter body, and the sensor module (20) comprises an upstream ultrasonic sensor and a downstream ultrasonic sensor; the upstream ultrasonic sensor and the downstream ultrasonic sensor respectively transmit ultrasonic signals to each other and receive ultrasonic signals of each other;
the signal conditioning module (15) comprises a matching circuit (153), a filtering circuit (152) and an amplifying circuit (151) which are connected in sequence; the signal output end of the sensor module (20) is in communication connection with the input end of the matching circuit (153), and the signal output end of the amplifying circuit (151) is in communication connection with the signal input end of the measuring circuit module (14).
2. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the display module (30) is an LCD display for displaying the gas flow, the instantaneous flow and the accumulated flow of the ultrasonic gas meter, the power supply voltage state, the gas flow direction state and the alarm information.
3. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the processor module (11) is further connected with a valve driving module (31), and the valve driving module (31) is connected with a valve of the gas meter.
4. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the processor module (11) is further connected with a wireless M-BUS module (32), and the wireless M-BUS module (32) is used for transmitting natural gas meter reading data to a gas company.
5. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the processor module (11) is further connected with an IC card read-write module (33).
6. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the processor module (11) is further connected with an anti-theft monitoring module (34).
7. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the processor module (11) is further connected with a temperature compensation module (36), and the temperature compensation module (36) is used for calibrating the gas flow according to temperature change.
8. The detection circuit for the ultrasonic gas meter according to claim 1, wherein the processor module (11) is further connected with an IRDA infrared communication module (37).
9. An ultrasonic gas meter comprises a shell, a gas flow passage (2) and an ultrasonic detection circuit; the ultrasonic detection device is characterized in that the cross section of the gas flow channel (2) is of a rectangular structure, the length of the rectangular structure is 15 mm-300 mm, the width of the rectangular structure is 3 mm-100 mm, and the ultrasonic detection circuit adopts any one of claims 1-8.
10. The ultrasonic gas meter according to claim 9, wherein an alkaline battery case and a communication interface are disposed outside the housing.
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| CN201320549931.8U CN203405242U (en) | 2013-09-05 | 2013-09-05 | Detection circuit used for ultrasonic gas meter and ultrasonic gas meter thereof |
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| CN201320549931.8U CN203405242U (en) | 2013-09-05 | 2013-09-05 | Detection circuit used for ultrasonic gas meter and ultrasonic gas meter thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834252A (en) * | 2015-04-20 | 2015-08-12 | 成都千嘉科技有限公司 | Supersonic gas meter and supersonic gas meter control system |
| CN109297552A (en) * | 2018-11-26 | 2019-02-01 | 浙江清环智慧科技有限公司 | Fast flow detection method, device and fast flow detector |
| CN109975685A (en) * | 2017-12-27 | 2019-07-05 | 新智数字科技有限公司 | The detection method and detection system of GPRS domestic gas meter circuit board |
| CN114136388A (en) * | 2021-12-16 | 2022-03-04 | 伊玛精密电子（苏州）有限公司 | Intelligent ultrasonic flow sensor |
-
2013
- 2013-09-05 CN CN201320549931.8U patent/CN203405242U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834252A (en) * | 2015-04-20 | 2015-08-12 | 成都千嘉科技有限公司 | Supersonic gas meter and supersonic gas meter control system |
| CN109975685A (en) * | 2017-12-27 | 2019-07-05 | 新智数字科技有限公司 | The detection method and detection system of GPRS domestic gas meter circuit board |
| CN109297552A (en) * | 2018-11-26 | 2019-02-01 | 浙江清环智慧科技有限公司 | Fast flow detection method, device and fast flow detector |
| CN114136388A (en) * | 2021-12-16 | 2022-03-04 | 伊玛精密电子（苏州）有限公司 | Intelligent ultrasonic flow sensor |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20200905 |