CN114923598A

CN114923598A - Wearable thermometer based on disposable temperature probe

Info

Publication number: CN114923598A
Application number: CN202210593311.8A
Authority: CN
Inventors: 孙晓明; 强小龙
Original assignee: Xingxiang Medical Technology Hangzhou Co ltd
Current assignee: Xingxiang Medical Technology Hangzhou Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-08-19

Abstract

The invention provides a wearable thermometer based on a disposable temperature measuring probe, which comprises the disposable temperature measuring probe and a host, wherein the host and the disposable temperature measuring probe are independent respectively, and the host is connected with a connecting wire of the disposable temperature measuring probe. When the host computer is connected with the disposable temperature probe, the host computer collects data and processes the data to obtain a temperature measurement value. And temperature measurement data are transmitted to the terminal, so that remote monitoring is realized. The disposable temperature measuring probe is provided with a data storage unit for storing the temperature data error of the disposable temperature measuring probe. The high-precision body temperature monitoring is realized through temperature compensation. This disposable temperature probe and host computer mutual independence, disposable temperature probe can be changed, guarantees the health, reduces cross infection to do not influence the accuracy of temperature measurement after changing disposable temperature probe.

Description

Wearable thermometer based on disposable temperature probe

Technical Field

The invention relates to a medical electronic thermometer, in particular to a wearable thermometer based on a disposable temperature measuring probe.

Background

At present, the body temperature of a human body is generally measured by a mercury thermometer in a hospital. However, the mercury thermometer is easy to break, the toxic mercury flows out, mercury poisoning is easily caused, the mercury is highly polluting, and environmental pollution is caused in the production process of the mercury thermometer. Therefore, the electronic thermometer which is convenient to use, non-toxic and pollution-free is produced. Mercury thermometers are reusable thermometers, and the disinfection process is time consuming, especially in the case of more patients. However, since various viruses are now in wide variety, germs are ubiquitous, and the demands of users for sanitary conditions in hospitals and at home are also increasing, it is desired that accurate body temperature measurement results be obtained, that exclusive use of thermometers be enabled, and that use of thermometers without mixing with other people be ensured against contamination by other infectious agents. However, the electronic thermometers on the market at present are expensive, and cannot be used once at all, but in hospitals or other medical places, in order to ensure the only use of patients and avoid cross infection, the electronic thermometers must be subjected to a lengthy and complicated disinfection process before being used, so that the electronic thermometers can be used safely and repeatedly. In order to solve the above problems, electronic thermometers with disposable thermometric probes are available on the market.

Through the search and discovery with the prior art patent, CN201220290559.9 patent proposes an electronic clinical thermometer with a replaceable temperature measuring head, and cn201621340661.x patent proposes a split type micro wireless electronic clinical thermometer. However, these inventions have the following problems:

the resistance error and the B value error of the NTC thermistor cause inaccurate temperature measurement, and the individual difference of the replaceable temperature measuring probe causes the temperature measurement error after the temperature measuring probe is replaced.

Disclosure of Invention

Aiming at the technical defects in the prior art, the invention aims to provide a wearable thermometer based on a disposable temperature measuring probe, so as to reduce temperature measuring errors caused by individual differences of the temperature measuring probe.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a wearable thermometer based on a disposable temperature measuring probe comprises a disposable temperature measuring probe, a host and a connecting wire; one end of the connecting wire is detachably connected to the disposable temperature measuring probe, and the other end of the connecting wire is connected with the host;

the host computer includes: the power supply supplies power to the MCU after being controlled by the power supply, the MCU is connected with the human-computer interaction module, the MCU is connected to the temperature measurement module, the data storage module is connected to the MCU, and the MCU is connected with the connecting wire; the data storage module is Flash, and the temperature measurement module calibrates data to store the data storage module;

the disposable temperature measuring probe comprises a temperature sensitive element and a data storage unit, wherein the temperature sensitive element is connected to a temperature measuring module of the host through a connecting wire, the data storage unit is connected to an MCU of the host through a connecting wire, and the data storage unit stores temperature calibration data of the temperature sensitive element.

The temperature measuring module comprises a reference voltage source, a divider resistor and a high-precision ADC, wherein the reference voltage source is connected to one end of the NTC thermistor after being connected to the divider resistor, and then is grounded from the other end of the NTC thermistor; the high-precision ADC obtains voltage from the connection part of the divider resistor and the NTC thermistor and then sends the voltage into the MCU.

The shell at the side of the temperature sensitive element of the disposable temperature measuring probe is provided with an adhesive sheet.

The temperature calibration data is the difference value of the body temperature value of the measured person calculated by using a host computer and the numerical value read by the mercury temperature.

The calibration data of the temperature measurement module is a calibration value of the divider resistor.

The host comprises a wireless module, the wireless module is used for realizing data processing and data transmission, and body temperature data is transmitted to the terminal through the wireless module.

The host computer comprises a human-computer interaction module, the human-computer interaction module comprises a key and a display module, and the display module is an LED.

The connecting wire is a Type-C wire, an HDMI wire or a VGA wire.

The main machine is provided with a shell, the shell is provided with a buckle, and the main machine is fixed at the clothes through the buckle.

A use method of a wearable thermometer based on a disposable temperature measuring probe comprises the following steps:

(1) voltage-dividing resistance calibration value: a standard reference resistor is connected in the two divider resistors to form a divider circuit instead of an NTC thermistor, then a high-precision ADC is used for measuring the voltages at two ends of the reference resistor, and the divider resistor calibration value is calculated through ohm's law;

(2) acquiring temperature calibration data: calibrating the temperature by using a water tank, comparing the temperature value calculated by using a host with a numerical value read out by using the high-precision mercury temperature, and taking the difference as temperature calibration data;

(3) writing the temperature calibration data into a data storage unit of the disposable temperature measuring probe: the host is connected with the disposable temperature measuring probe through a connecting line, and the temperature calibration data is written into a data storage unit of the disposable temperature measuring probe;

(4) during temperature measurement, the host computer collects circuit data and temperature calibration data of the disposable temperature measurement probe, calculates a temperature measurement value by combining the calibration data of the temperature measurement module, and then sends the temperature measurement value to the human-computer interaction module for display.

Compared with the prior art, the embodiment of the invention has at least one of the following beneficial effects:

the disposable temperature measuring probe and the host machine of the wearable thermometer are mutually independent, the disposable temperature measuring probe can be replaced, the sanitation is guaranteed, the cross infection is reduced, and the accuracy of temperature measurement is not influenced after the disposable temperature measuring probe is replaced. The temperature measurement data can be transmitted to the terminal in real time, and remote monitoring is achieved.

The wearable thermometer provided by the invention has the advantages that the disposable temperature measuring probe is provided with the data storage unit, and the temperature data error of the disposable temperature measuring probe is stored. The temperature data error is utilized to carry out temperature compensation, the measured temperature is calibrated, and high-precision body temperature monitoring can be realized.

According to the wearable thermometer, the host stores the calibration value of the divider resistor, and the divider resistor is calibrated before measurement, so that errors caused by introduction of the divider resistor are reduced, and the accuracy of temperature measurement is ensured.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic diagram of the circuit configuration of the present invention;

FIG. 2 is a schematic diagram of the host architecture of the present invention;

FIG. 3 is a schematic diagram of a disposable temperature probe according to the present invention;

FIG. 4 is a schematic diagram of the host architecture of the present invention;

FIG. 5 is a schematic diagram of a host and an interface structure on the host according to the present invention;

FIG. 6 is a schematic circuit diagram of the temperature measuring module and the NTC thermistor according to the present invention.

The scores in the figure are indicated as: the temperature measuring device comprises a disposable temperature measuring probe 1, a connecting wire 2, a host machine 3, a temperature sensitive element 4, an adhesive sheet 5, an interface 6, a shell 7 and a buckle 8.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the invention.

Since various viruses are widely used today and germs are ubiquitous, the demand of users for sanitary conditions in hospitals or at home is also increasing, and it is desired that accurate body temperature measurement results be obtained, and that exclusive use of thermometers is also possible, so that the thermometers are not mixed with other people and are protected from contamination by other infectious agents. Accordingly, in one embodiment, the present invention provides a wearable thermometer based on a disposable temperature probe, comprising:

the disposable temperature measuring probe is used for being placed in an environment to be measured;

the host, the host and the disposable temperature measuring probe are independent respectively; when the host computer is connected with disposable temperature probe, the host computer gathers data and handles and obtain the temperature measurement value.

In the embodiment, the host computer and the disposable temperature measuring probe are separated and are connected with each other through a connecting wire when in use. The disposable temperature measuring probe is disposable to ensure sanitation and prevent cross infection.

The probe and the host are connected through a type-C connecting line.

As shown in FIGS. 1-6, the disposable temperature probe is composed of a temperature sensitive element 4, a data storage unit, an interface 6, and a disposable temperature probe housing 7.

The temperature sensitive element 4 is not limited and can be adjusted according to actual conditions. In the present embodiment, a negative temperature coefficient thermistor is used. The data storage unit adopts EEPROM and is used for storing the temperature calibration data of the probe.

The disposable temperature measuring probe 1 is connected with the host machine 3 through the connecting wire 2, so that power supply of the host machine to the probe and data transmission of the probe to the host machine are realized.

The disposable temperature probe shell and the temperature sensitive element are provided with the adhesive sheet 5 on the same surface, and when in use, the disposable temperature probe can be fixed on the skin such as armpit, belly skin and forehead through the adhesive sheet 5 on the disposable temperature probe shell to measure the body temperature.

The shape of the shell of the disposable temperature measuring probe, the shape and the position of the adhesive sheet 5 and the position of the temperature sensitive element 4 are not limited. As a preferred embodiment, the disposable temperature measuring probe shell adopts a cake-shaped structure design, the adhesive sheet 5 is an annular sheet and is flatly laid at one side surface of the disposable temperature measuring probe shell, and the temperature sensitive element 1 is positioned in an inner ring of the adhesive sheet.

In this embodiment, the host includes a housing, a power module, a temperature measurement module, a human-computer interaction module, and a wireless module.

The power module is used as a basic module and comprises a power supply and a power supply control module, and the power supply module is responsible for power supply of the whole circuit, charging of a lithium battery and switching of a low-power-consumption mode.

The temperature measurement module is mainly used as a thermistor voltage division circuit and for data acquisition. The temperature measurement module can realize the measurement of body temperature and the calibration of temperature measurement data, and the temperature measurement probe is not required to be corrected after being replaced.

And the human-computer interaction module is used for realizing distribution network, program downloading and calibration operation.

The wireless module transmits the temperature measurement data to the terminal to realize remote monitoring.

The divider resistance calibration was performed as follows: and a standard reference resistor is used for replacing an NTC thermistor and is connected with a divider resistor in series to form a divider circuit, then a high-precision ADC is used for measuring the voltage of the reference resistor, and the resistance value of the divider resistor is calculated through ohm's law.

The acquisition process of the temperature calibration data is carried out as follows: the temperature is calibrated by the water tank, the temperature value calculated by the host is compared with the value read out by the mercury temperature with the accuracy of 0.01 percent, and the difference value is temperature calibration data. And writing the temperature calibration data into a data storage unit of the disposable temperature measuring probe.

When measuring temperature at every turn, at first read the host computer back to the temperature calibration data of abandoning type temperature probe, through temperature compensation, eliminate every abandoning type temperature probe's error, still can keep high accuracy temperature measurement after having realized the probe change.

The temperature measurement module is connected with a divider resistor in series at the upper end of the NTC thermistor, the divider resistor is calibrated by using a voltammetry method, and the NTC thermistor voltage is measured by using a high-precision ADC. The structure can ensure that the disposable temperature measuring probe is not required to be corrected again after being replaced, and the precision which should be achieved by the electronic thermometer in accordance with the medical standard is still kept.

Specifically, the host temperature measuring module contains a reference voltage source of 2.495V and 0.5 percent, and the NTC thermistor is connected with a divider resistor and an 18-bit high-precision ADC. The NTC thermistor is located the disposable temperature probe, and the host computer passes through type-C interface with the temperature probe and links to each other, forms bleeder circuit for measure NTC thermistor resistance.

The voltage dividing resistor and the temperature need to be calibrated before temperature measurement. In the embodiment, the reference voltage source, the reference resistance value and the high-precision ADC are not limited and can be adjusted according to actual conditions.

As a preferred embodiment, the wireless module in the host transmits data. In this embodiment, the wireless module is an MCU integrated radio frequency module.

As a preferred embodiment, the man-machine interaction module realizes distribution network, program downloading and calibration operations.

In other embodiments of the present invention, the main machine is further provided with a key and an LED indicator, and the housing 7 is provided with a buckle. The host computer passes through the buckle to be fixed on user's clothes, and fixed interface is the magnetism knot in this embodiment. The keys adjust different functions. The LED indicating lamp indicates the on/off, charging and using states.

The host computer is matched with the disposable temperature measuring probe for use, and can continuously measure the body temperature in real time.

The host machine realizes the following functions through automatic control: the host computer enters a deep sleep mode at regular time, and a peripheral circuit power supply is cut off, so that the power consumption is reduced to the maximum extent; the host is awakened regularly, and then enters deep sleep after automatically connecting a network to send data; if the network connection is unsuccessful, the network is reconnected for many times, and then the network directly enters a deep sleep mode if the network is not successfully connected, thereby greatly prolonging the service time.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The above-described preferred features may be used in any combination without conflict with each other.

Claims

1. A wearable thermometer based on a disposable temperature measuring probe is characterized by comprising the disposable temperature measuring probe, a host and a connecting wire; one end of the connecting wire is detachably connected to the disposable temperature measuring probe, and the other end of the connecting wire is connected with the host;

the host includes: the power supply supplies power to the MCU after being controlled by the power supply, the MCU is connected with the human-computer interaction module, the MCU is connected with the temperature measurement module, the data storage module is connected with the MCU, and the MCU is connected with the connecting wire; the data storage module is Flash, and the temperature measurement module calibrates data to store the data storage module;

2. The wearable thermometer of claim 1, wherein the thermometric module comprises a reference voltage source, a divider resistor and a high-precision ADC, the reference voltage source is connected to the divider resistor, then connected to one end of the NTC thermistor, and then grounded from the other end of the NTC thermistor; the high-precision ADC obtains voltage from the connection part of the divider resistor and the NTC thermistor and then sends the voltage into the MCU.

3. The wearable thermometer of claim 1, wherein the disposable temperature probe comprises an adhesive patch disposed on the housing of the disposable temperature probe.

4. The wearable thermometer of claim 1 wherein the temperature calibration data is the difference between the measured body temperature value calculated using a host computer and the mercury temperature reading.

5. The wearable thermometer of claim 1 wherein the thermometry module calibration data is a potentiometer calibration value.

6. The wearable thermometer of claim 1, wherein the host comprises a wireless module for processing and transmitting data, and the temperature data is transmitted to the terminal via the wireless module.

7. The wearable thermometer of claim 1, wherein the host comprises a human-computer interaction module, the human-computer interaction module comprises a key and a display module, and the display module is an LED.

8. The wearable thermometer of any one of claims 1 through 7 wherein the connection line is a Type-C line, an HDMI line or a VGA line.

9. The wearable thermometer of any of the above claims 1 to 7, wherein the main body has a housing, the housing has a snap for securing the main body to an article of clothing.

10. The method of using a wearable thermometer with disposable thermometric probe according to claim 1, comprising the steps of:

(2) acquiring temperature calibration data: the temperature is calibrated by utilizing the water tank, the temperature value calculated by using the host is compared with the numerical value read out by the high-precision mercury temperature, and the difference value is temperature calibration data;