CN210071167U

CN210071167U - High-precision electronic thermometer

Info

Publication number: CN210071167U
Application number: CN201920352848.9U
Authority: CN
Inventors: 宋娅楠; 熊恋鸿
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-02-14
Anticipated expiration: 2029-03-20

Abstract

The utility model discloses a high-precision electronic thermometer, which comprises a power module, a control module, a temperature detection module, a Bluetooth module and a mobile phone APP; the power supply module is respectively connected with the control module and the Bluetooth module; the control module is connected with the temperature detection module during implementation; the Bluetooth module is communicated with the mobile phone APP through a mobile phone Bluetooth function; the utility model discloses an integrated circuit U3 with high accuracy ADC is the core to collocation high accuracy NTC temperature sensor and high performance bluetooth 4.0 module, can realize that the temperature measurement error is not more than 0.1 ℃; through bluetooth module's communication function, can realize with the real-time communication between cell-phone APP, can know the temperature variation in a period to in time take corresponding measure.

Description

High-precision electronic thermometer

Technical Field

The utility model relates to body temperature measurement technical field especially involves a high accuracy electrothermometer.

Background

The electronic thermometer can quickly and accurately measure the body temperature of a human body, has the advantages of convenient reading and short measuring time compared with the traditional mercury glass thermometer, particularly does not contain mercury, is harmless to the human body and the surrounding environment, and is particularly suitable for being used in places such as families, hospitals and the like.

The existing electronic thermometer has larger measurement error, can not well reflect the actual temperature of a measured object, and brings inconvenience to life.

Accordingly, the prior art is deficient and needs improvement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high accuracy electrothermometer, the above-mentioned problem of solution.

In order to solve the above problem, the utility model provides a technical scheme as follows:

a high-precision electronic thermometer comprises a power supply module, a control module, a temperature detection module, a Bluetooth module and a mobile phone APP; the power supply module is respectively connected with the control module and the Bluetooth module; the control module is connected with the temperature detection module during implementation; the Bluetooth module is communicated with the mobile phone APP through a mobile phone Bluetooth function.

In a preferred technical scheme, the power supply module comprises a battery BT 1; the negative electrode of the battery BT1 is grounded; the battery BT1 is a DC3.3V lithium ion button battery.

In a preferred technical scheme, the control module comprises capacitors C1-C5, C7-C10, switches S1-S2, a connector P1 and an integrated circuit U2-U3; the connector P1 is a read-write interface of the integrated circuit U3; the model of the integrated circuit U2 is 24C 02; the model of the integrated circuit U3 is FS98O 01; the switch S1 is a setting button; the switch S2 is a standard revision key.

In a preferred embodiment, a first terminal of the capacitor C9 is connected to a second terminal of the capacitor C1, the 45 th and 47 th pins of the integrated circuit U3, the 1 st pin of the connector P1, and the 8 th pin of the integrated circuit U2, respectively; the 4 th to 5 th pins of the integrated circuit U3 are sequentially connected with the first ends of the switches S1 to S2 respectively; the second ends of the switches S1-S2 are all grounded; the first ends of the capacitors C1, C3-C5 and the 48 th pin of the integrated circuit U3 are all grounded; the 43 th pin of the integrated circuit U3 is connected with the 44 th pin of the integrated circuit U3 through the capacitor C2; the 41 th, 39 th and 38 th pins of the integrated circuit U3 are sequentially connected with the second ends of the capacitors C3-C5 respectively; the 51 th to 52 th pins of the integrated circuit U3 are sequentially connected with the second ends of the capacitors C7 to C8 respectively; the first ends of the capacitors C7-C8 are all grounded; the second end of the capacitor C8 and the 58 th pin of the integrated circuit U3 are both connected with analog ground; the 61 st pin of the integrated circuit U3 is connected with the 62 nd pin of the integrated circuit U3 through the capacitor C10; pins 2 to 5 of the connector P1 are sequentially connected with

pins

64, 5, 8 and 9 of the integrated circuit U3 respectively; the 5 th to 6 th pins of the integrated circuit U2 are sequentially connected with the 8 th to 9 th pins of the integrated circuit U3 respectively; the second terminal of the capacitor C9, the 7 th pin of the integrated circuit U2, and the 6 th pin of the connector P1 are all grounded.

According to the preferable technical scheme, the temperature detection module comprises resistors R6-R8; the second end of the resistor R6 is connected with the first end of the resistor R7; the second end of the resistor R7 is connected with the first end of the resistor R8; the second end of the resistor R8 is grounded; the resistor R7 is an NTC sensor with the model of MF52-104F 3950.

In a preferred technical scheme, the bluetooth module comprises resistors R1-R4, a switch S3, a triode Q1 and an integrated circuit U1; the triode Q1 is an NPN type field effect transistor; the integrated circuit U1 is BLE4.0 module.

In a preferred embodiment, a second end of the resistor R1 is connected to a drain of the transistor Q1 and a 6 th pin of the integrated circuit U1, respectively; the second end of the resistor R2 is connected with the 5 th pin of the integrated circuit U1; the second end of the resistor R3 is respectively connected with the first end of the resistor R4 and the gate of the triode Q1; the second end of the resistor R4, the source of the transistor Q1, the 1 st pin of the integrated circuit U1 and the second end of the switch S3 are connected; the 10 th pin of the integrated circuit U1 is connected to the first terminal of the switch S3.

Compared with the prior art, the beneficial effects are that, adopt above-mentioned scheme, the utility model discloses an integrated circuit U3 with high accuracy ADC is the core to collocation high accuracy NTC temperature sensor and high performance bluetooth 4.0 module, can realize that the temperature measurement error is not more than 0.1 ℃; through bluetooth module's communication function, can realize with the real-time communication between cell-phone APP, can know the temperature variation in a period to in time take corresponding measure.

Drawings

For a clearer explanation of the embodiments or technical solutions in the prior art, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block diagram of a high-precision electronic thermometer according to the present invention;

FIG. 2 is a schematic circuit diagram of a power module of a high-precision electronic thermometer of the present invention;

FIG. 3 is a schematic circuit diagram of a high-precision electronic thermometer control module according to the present invention;

FIG. 4 is a schematic circuit diagram of a temperature detection module of a high-precision electronic thermometer according to the present invention;

fig. 5 is the utility model discloses a high accuracy electrothermometer bluetooth module circuit schematic diagram.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "fixed," "integrally formed," "left," "right," and the like in this specification is for illustrative purposes only, and elements having similar structures are designated by the same reference numerals in the figures.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1-5, one embodiment of the present invention is:

The power supply module comprises a battery BT 1; the negative electrode of the battery BT1 is grounded; the battery BT1 is a DC3.3V lithium ion button battery.

The control module comprises capacitors C1-C5, C7-C10, switches S1-S2, a connector P1 and integrated circuits U2-U3;

the positive electrode of the battery BT1 is connected with a first end of the capacitor C9;

the first end of the capacitor C9 is respectively connected with the second end of the capacitor C1, the 45 th pin and the 47 th pin of the integrated circuit U3, the 1 st pin of the connector P1 and the 8 th pin of the integrated circuit U2; the 4 th to 5 th pins of the integrated circuit U3 are sequentially connected with the first ends of the switches S1 to S2 respectively; the second ends of the switches S1-S2 are all grounded; the first ends of the capacitors C1, C3-C5 and the 48 th pin of the integrated circuit U3 are all grounded; the 43 th pin of the integrated circuit U3 is connected with the 44 th pin of the integrated circuit U3 through the capacitor C2; the 41 th, 39 th and 38 th pins of the integrated circuit U3 are sequentially connected with the second ends of the capacitors C3-C5 respectively; the 51 th to 52 th pins of the integrated circuit U3 are sequentially connected with the second ends of the capacitors C7 to C8 respectively; the first ends of the capacitors C7-C8 are all grounded; the second end of the capacitor C8 and the 58 th pin of the integrated circuit U3 are both connected with analog ground; the 61 st pin of the integrated circuit U3 is connected with the 62 nd pin of the integrated circuit U3 through the capacitor C10; pins 2 to 5 of the connector P1 are sequentially connected with

pins

64, 5, 8 and 9 of the integrated circuit U3 respectively; the 5 th to 6 th pins of the integrated circuit U2 are sequentially connected with the 8 th to 9 th pins of the integrated circuit U3 respectively; the second end of the capacitor C9, the 7 th pin of the integrated circuit U2 and the 6 th pin of the connector P1 are all grounded;

the connector P1 is a read-write interface of the integrated circuit U3; the model of the integrated circuit U2 is 24C 02; the model of the integrated circuit U3 is FS98O 01; the switch S1 is a setting button; the switch S2 is a standard revision key.

The temperature detection module comprises resistors R6-R8;

a first end of the resistor R6 is connected with a second end of the capacitor C4; the second end of the resistor R7 is connected with the 57 th pin of the integrated circuit U3;

the second end of the resistor R6 is connected with the first end of the resistor R7; the second end of the resistor R7 is connected with the first end of the resistor R8; the second end of the resistor R8 is grounded; the resistor R7 is an NTC sensor with the model of MF52-104F 3950.

The Bluetooth module comprises resistors R1-R4, a switch S3, a triode Q1 and an integrated circuit U1;

the positive electrode of the battery BT1 is connected with a first end of the resistor R1; a first end of the resistor R3 is connected with a 38 th pin of the integrated circuit U3; the 17 th and 14 th pins of the integrated circuit U1 are sequentially connected with the 10 th to 11 th pins of the integrated circuit U3 respectively; the first end of the resistor R1 is respectively connected with the first end of the resistor R2 and the 2 nd pin of the integrated circuit U1; a second end of the resistor R1 is respectively connected with the drain of the triode Q1 and the 6 th pin of the integrated circuit U1; the second end of the resistor R2 is connected with the 5 th pin of the integrated circuit U1; the second end of the resistor R3 is respectively connected with the first end of the resistor R4 and the gate of the triode Q1; the second end of the resistor R4, the source of the transistor Q1, the 1 st pin of the integrated circuit U1 and the second end of the switch S3 are connected; the 10 th pin of the integrated circuit U1 is connected with the first end of the switch S3;

the triode Q1 is an NPN type field effect transistor; the integrated circuit U1 is BLE4.0 module.

The Bluetooth module supports a transparent transmission mode, the MCU of the control module transmits temperature data to the Bluetooth module through an RX port, and then the temperature data is transmitted to the mobile phone APP by the Bluetooth module, and the Bluetooth module is mainly arranged between the mobile phone APP and the Bluetooth module; the enable end EN of the Bluetooth module is controlled by the MCU so as to control the power consumption of the Bluetooth module after shutdown, and the main chip of the Bluetooth module adopts CC2540 of TI.

The MCU of the control module is used for rich crystal FS98o01, an internal band 14-bit high-precision differential input and differential reference ADC, an internal 1MHZ clock, main load temperature acquisition, data processing and data transmission, and the current is about 2uA during sleep.

The NTC of the temperature detection module adopts a thermistor with the model of MF52-104F3950, the B value of 3950K and the resistance value of 100K ohms at 25 ℃, because the resistance value of the NTC sensor changes along with the temperature and is nonlinear, the method adopted in the case is that a range of 25-45 ℃ is taken, simultaneously multi-point calibration is adopted, a calibration point is taken at every 2 ℃, 11 calibration points are totally taken, the interval of every 2 ℃ is regarded as linear, calibration data is firstly stored in an integrated circuit U2, the calibration data is firstly read out from the integrated circuit U2 when the Bluetooth module is started, ADC is adopted to compare with the calibration data one by one when the temperature is measured, the temperature range in which the calibration data is located is judged, and then the calibration data is converted into the corresponding temperature and output to the Bluetooth module; the work is set to output 0.0 ℃ when the measured temperature is less than 25 ℃, and the precision is not controlled when the measured temperature is more than 45 ℃.

Quickly pressing the S1 key twice to start up, and pressing the S1 key for a long time to shut down; and when the computer is started, pressing an S2 key to enter a calibration mode.

It should be noted that the above technical features are continuously combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; moreover, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims

1. A high-precision electronic thermometer is characterized by comprising a power supply module, a control module, a temperature detection module, a Bluetooth module and a mobile phone APP; the power supply module is respectively connected with the control module and the Bluetooth module; the control module is connected with the temperature detection module during implementation; the Bluetooth module is communicated with the mobile phone APP through a mobile phone Bluetooth function; the control module comprises capacitors C1-C5, C7-C10, switches S1-S2, a connector P1 and integrated circuits U2-U3; the connector P1 is a read-write interface of the integrated circuit U3; the model of the integrated circuit U2 is 24C 02; the model of the integrated circuit U3 is FS98O 01; the switch S1 is a setting button; the switch S2 is a correction key; the first end of the capacitor C9 is respectively connected with the second end of the capacitor C1, the 45 th pin and the 47 th pin of the integrated circuit U3, the 1 st pin of the connector P1 and the 8 th pin of the integrated circuit U2; the 4 th to 5 th pins of the integrated circuit U3 are sequentially connected with the first ends of the switches S1 to S2 respectively; the second ends of the switches S1-S2 are all grounded; the first ends of the capacitors C1, C3-C5 and the 48 th pin of the integrated circuit U3 are all grounded; the 43 th pin of the integrated circuit U3 is connected with the 44 th pin of the integrated circuit U3 through the capacitor C2; the 41 th, 39 th and 38 th pins of the integrated circuit U3 are sequentially connected with the second ends of the capacitors C3-C5 respectively; the 51 th to 52 th pins of the integrated circuit U3 are sequentially connected with the second ends of the capacitors C7 to C8 respectively; the first ends of the capacitors C7-C8 are all grounded; the second end of the capacitor C8 and the 58 th pin of the integrated circuit U3 are both connected with analog ground; the 61 st pin of the integrated circuit U3 is connected with the 62 nd pin of the integrated circuit U3 through the capacitor C10; pins 2 to 5 of the connector P1 are sequentially connected with pins 64, 5, 8 and 9 of the integrated circuit U3 respectively; the 5 th to 6 th pins of the integrated circuit U2 are sequentially connected with the 8 th to 9 th pins of the integrated circuit U3 respectively; the second end of the capacitor C9, the 7 th pin of the integrated circuit U2 and the 6 th pin of the connector P1 are all grounded; the temperature detection module comprises resistors R6-R8; the second end of the resistor R6 is connected with the first end of the resistor R7; the second end of the resistor R7 is connected with the first end of the resistor R8; the second end of the resistor R8 is grounded; the Bluetooth module comprises resistors R1-R4, a switch S3, a triode Q1 and an integrated circuit U1; a second end of the resistor R1 is respectively connected with the drain of the triode Q1 and the 6 th pin of the integrated circuit U1; the second end of the resistor R2 is connected with the 5 th pin of the integrated circuit U1; the second end of the resistor R3 is respectively connected with the first end of the resistor R4 and the gate of the triode Q1; the second end of the resistor R4, the source of the transistor Q1, the 1 st pin of the integrated circuit U1 and the second end of the switch S3 are connected; the 10 th pin of the integrated circuit U1 is connected to the first terminal of the switch S3.

2. A high precision electronic thermometer according to claim 1, wherein said power supply module comprises a battery BT 1; the negative electrode of the battery BT1 is grounded; the battery BT1 is a DC3.3V lithium ion button battery.

3. A high precision electronic thermometer according to claim 1, wherein said resistor R7 is an NTC sensor of the type MF52-104F 3950.

4. A high precision electronic thermometer according to claim 1, wherein said transistor Q1 is an NPN-type field effect transistor; the integrated circuit U1 is BLE4.0 module.