阅读说明：本技术 一种便携式n型热电偶温度检测装置 (Portable N type thermocouple temperature-detecting device ) 是由 王伊民 张伟 刘婧琦 韩俊宝 于 2020-06-24 设计创作，主要内容包括：本发明公布了一种便携式N型热电偶温度检测装置,涉及热电偶和单片机技术领域,温度检测模块将采集到的温度转换成热电动势信号,传输到控制模块发送端的主控芯片中,经主控芯片处理后,将信号输送到显示模块发送端中并显示,同时热电动势信号由无线透传模块发送端发送至无线透传模块接收端中,无线透传模块接收端将温度信号传输到控制模块接收端的主控芯片上,同时将信号输送到显示模块接收端中并显示；外部电源模块为温度检测模块、控制模块发送端、控制模块接收端、显示模块发送端、显示模块接收端、无线透传模块发送端和无线透传模块接收端提供电源。本发明线路简单小巧、易于携带,温度测量范围大且准确,可实现远程多路温度监测。(The invention discloses a portable N-type thermocouple temperature detection device, which relates to the technical field of thermocouples and single-chip microcomputers, wherein a temperature detection module converts the collected temperature into a thermal electromotive force signal, transmits the thermal electromotive force signal to a main control chip of a control module transmitting end, transmits the signal to a display module transmitting end after the signal is processed by the main control chip and displays the signal, meanwhile, the thermal electromotive force signal is transmitted to a wireless transparent transmission module receiving end by the wireless transparent transmission module transmitting end, the wireless transparent transmission module receiving end transmits the temperature signal to the main control chip of the control module receiving end, and simultaneously transmits the signal to the display module receiving end and displays the signal; the external power supply module provides power for the temperature detection module, the control module sending end, the control module receiving end, the display module sending end, the display module receiving end, the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end. The invention has simple and small circuit, easy carrying, large and accurate temperature measurement range and can realize remote multi-path temperature monitoring.)

1. A portable N-type thermocouple temperature detection device, comprising: the temperature detection module converts the collected temperature into a thermal electromotive force signal, transmits the thermal electromotive force signal to a main control chip of the control module transmitting end, processes the thermal electromotive force signal by the main control chip, transmits the signal to the display module transmitting end and displays a temperature value, simultaneously transmits the thermal electromotive force signal to the wireless transparent transmission module receiving end by the wireless transparent transmission module transmitting end, transmits the temperature signal to the main control chip of the control module receiving end, simultaneously transmits the signal to the display module receiving end and displays a received temperature value; the external power supply module provides power for the temperature detection module, the control module sending end, the control module receiving end, the display module sending end, the display module receiving end, the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end.

2. The portable N-type thermocouple temperature detection device according to claim 1, wherein the control module sending end and the control module receiving end are two single-chip microcomputers and are responsible for processing and transmitting analog and digital signals; the communication of the two single-chip microcomputers depends on the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end to realize the signal transmission function, and the temperature signal is transmitted to the control module receiving end from the control module sending end through the wireless transparent transmission module sending end.

3. The portable type-N thermocouple temperature detection device according to claim 1, wherein the temperature detection module comprises a four-way thermocouple, a thermocouple amplifier, cold end compensation and an a/D converter; after the temperature is collected by each path of thermocouple, the thermocouple signal is converted into a voltage signal through an amplifier, the temperature of the cold end of the thermocouple is compensated, and then the temperature signal is transmitted to an A/D converter, and the temperature voltage value is converted into an equivalent temperature value.

4. The device of claim 1, wherein the display module transmitter and the display module receiver are two LCD screens, and the two LCD screens are respectively connected to the control module transmitter and the control module receiver, so as to display the temperature measured by the thermocouple on the LCD screens in real time.

5. The portable N-type thermocouple temperature detection device according to claim 2, wherein the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end are respectively connected with the control module sending end and the control module receiving end, and temperature signals are sent and received through a 2.4G wireless network to realize remote temperature monitoring.

6. The portable N-type thermocouple temperature detection device according to claim 1, wherein the external power supply module provides +5V power.

7. The portable N-type thermocouple temperature detection device according to claim 2, wherein STC89C52 is adopted by the main control chips at the control module sending end and the control module receiving end.

8. The portable N-type thermocouple temperature detection device according to claim 3, wherein the temperature detection module adopts MAX 31855.

9. The portable N-type thermocouple temperature detection device according to claim 4, wherein the display module sending end and the display module receiving end both use LCD12864 display screens.

10. The device as claimed in claim 5, wherein the transmitting end of the wireless transparent transmission module and the receiving end of the wireless transparent transmission module both use E01-ML01DP 5.

Technical Field

The invention relates to the technical field of thermocouples and single-chip microcomputers, in particular to a portable N-type thermocouple temperature detection device.

Background

Along with the development of industry and agriculture, people have higher requirements on production efficiency, so the requirements on temperature measurement precision, convenience and integration degree are more and more strict, and the combination of the microcomputer intelligent technology and the modern detection scientific technology of the modern scientific technology becomes the inevitable trend of the development of the temperature measurement technology. The combination between temperature control and the remote detection technique has promoted the development of science and technology, and some can be more accurate to the temperature of the very strict scientific device of temperature requirement, reduce the interference on the temperature, so how on the basis of make full use of traditional temperature measurement technique, improve the measurement accuracy and the wireless transmission stability of temperature measuring instrument and have very important meaning. Although the conventional temperature detection device is mature at present, the accuracy, integration and flexibility of the temperature detection need to be enhanced. For example, chinese patent application No. CN201811579070.1 discloses a welding temperature monitoring system and method, which is used to send the collected temperature to the upper computer of the computer, and the distance between the wireless transparent transmission module and the upper computer is limited, so that the upper computer is not easy to move, which results in that only the temperature around the upper computer can be measured, and the thermoelectromotive force is unstable due to preferential oxidation of nichrome in the K-type thermocouple. The invention has the advantages that the portable thermocouple temperature measuring device is easy to carry and convenient, the defects that an upper computer is heavy and is not easy to move are overcome, the thermocouple at the transmitting end is placed in the area needing to be measured, and the remote receiving end can directly receive the temperature signal; the N-type thermocouple is selected, and the thermoelectric potential is more stable than that of a K-type thermocouple; an E01-ML01DP5 module is selected to increase the stability of the communication means and strengthen the detection. The detection device can detect the temperature under different conditions, and gradually becomes a trend of development and update of the current detection device.

Disclosure of Invention

In view of the above disadvantages, the invention provides a portable N-type thermocouple temperature detection device, which is convenient to use and simple to operate, after power is turned on, a thermocouple can normally operate and accurately detect temperature, a display screen displays a real-time temperature value, a temperature value is wirelessly transmitted to a remote control end through a wireless transparent transmission module, and the temperature value is displayed on the display screen of the remote control end, so that a remote temperature detection function is realized. The whole sending end and the receiving end of the invention are easy to carry and convenient, the defects of heavy weight and difficult movement of an upper computer are overcome, and the technical problem of difficult carrying is solved. The display screens of the receiving end and the sending end update the temperature data once within 0.5 second, and the technical problem of inaccurate thermocouple temperature data is solved by compensating nonlinear temperature data change through software.

In order to solve the above technical problems, the present invention provides a portable N-type thermocouple temperature detection device, including: the temperature detection module converts the collected temperature into a thermal electromotive force signal, transmits the thermal electromotive force signal to a main control chip of the control module transmitting end, processes the thermal electromotive force signal by the main control chip, transmits the signal to the display module transmitting end and displays a temperature value, simultaneously transmits the thermal electromotive force signal to the wireless transparent transmission module receiving end by the wireless transparent transmission module transmitting end, transmits the temperature signal to the main control chip of the control module receiving end, simultaneously transmits the signal to the display module receiving end and displays a received temperature value; the external power supply module provides power for the temperature detection module, the control module sending end, the control module receiving end, the display module sending end, the display module receiving end, the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end.

Furthermore, the sending end and the receiving end of the control module are two singlechips and are mainly responsible for processing and transmitting analog and digital signals; the communication of the two single-chip microcomputers depends on the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end to realize the signal transmission function, and the temperature signal is transmitted to the control module receiving end from the control module sending end through the wireless transparent transmission module sending end.

Furthermore, the temperature detection module comprises a four-way thermocouple, a thermocouple amplifier, cold end compensation and an A/D converter; after the temperature is collected by each path of thermocouple, the thermocouple signal is converted into a voltage signal through an amplifier, the temperature of the cold end of the thermocouple is compensated, and then the temperature signal is transmitted to an A/D converter, and the temperature voltage value is converted into an equivalent temperature value.

Furthermore, the display module sending end and the display module receiving end are two LCD display screens, the two display screens are respectively connected with the control module sending end and the control module receiving end, the two LCD display screens are initialized through a program and write in instructions and data, and the temperature measured by the thermocouple is displayed on the LCD screen in real time.

Furthermore, the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end are respectively connected with the control module sending end and the control module receiving end, the wireless transparent transmission module sending end and the wireless transparent transmission module receiving end are initialized through programs, data such as sending address width, receiving address width, sending data width, receiving data width and register address are set, then the arrival of signals is waited, and finally temperature signals are sent and received through a 2.4G wireless network, so that the remote temperature monitoring is realized.

Further, the external power supply module provides +5V power.

Furthermore, the master control chips of the control module sending end and the control module receiving end both adopt STC89C 52.

Further, the temperature detection module adopts MAX 31855.

Further, the sending end and the receiving end of the display module both adopt LCD12864 display screens.

Further, the transmitting end and the receiving end of the wireless transparent transmission module both adopt E01-ML01DP 5.

The invention has the following beneficial effects: the invention provides a portable N-type thermocouple temperature detection device, which transmits a temperature value through a wireless transparent transmission module, realizes the effect of remotely monitoring the temperature, has stable transmission data and convenient operation, and compared with the traditional temperature measurement, the integral sending end and receiving end of the invention are easy to carry and convenient to carry, and get rid of the defects of heavy weight and difficult movement of an upper computer, the thermocouple at the sending end is placed in an area needing to be measured, and the remote receiving end can receive a temperature signal of a measurement area through a 2.4 network, thereby solving the technical problem that a temperature measurement device is difficult to move and carry. The display screens of the receiving end and the sending end update the temperature data once within 0.5 second, and the technical problem of inaccurate thermocouple temperature data is solved by program compensation of nonlinear temperature data change. The invention has wide temperature measuring range and higher temperature measuring precision, and can also realize multi-path temperature detection and disperse measurement of the environmental temperature in different areas.

Drawings

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

FIG. 2 is a schematic circuit diagram of a temperature detection module according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a control module transmitter circuit according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a receiving end circuit of a control module according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a transmitting end circuit of a display module according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a receiving circuit of a display module according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a circuit at a transmitting end of a wireless transparent transmission module according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a receiving end circuit of the wireless transparent transmission module according to the embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following components are merely preferred embodiments, and should not be construed as limiting the scope of the present invention.

Referring to fig. 1, a circuit block diagram according to the present invention is shown. The invention provides a portable N-type thermocouple temperature detection device, which comprises a temperature detection module 10, a control module sending end 20, a control module receiving end 30, a display module sending end 40, a display module receiving end 50, a wireless transparent transmission module sending end 60, a wireless transparent transmission module receiving end 70 and an external power supply module 80, wherein the control module sending end is connected with the control module sending end 30; the temperature measuring module converts the collected temperature into a thermal electromotive force signal, transmits the thermal electromotive force signal to the main control chip, transmits the signal to the display module after being processed by the main control chip, displays the temperature value measured by the thermocouple, simultaneously transmits the thermal electromotive force signal to the wireless transparent transmission module receiving end in another detection device from the wireless transparent transmission module transmitting end, transmits the temperature signal to the main control chip of the detection device by the wireless transparent transmission module receiving end, simultaneously transmits the signal to the display module of the device, and the display module displays the received temperature value; the external power supply module provides power for the temperature detection module, the control module, the display module and the wireless transparent transmission module.

Fig. 2 is a block diagram of a temperature detection module according to an embodiment of the present invention. The 1 pin of the MAX31855 chip 101 is grounded, the 2 pin and the 3 pin are respectively connected to the negative end and the positive end of the thermocouple 102, the 4 pin VCC is firstly connected to a 5V power supply and then connected in parallel with two 106 muF capacitors C1 and 104 muF capacitors C2 to be grounded, the SO pin, the CS pin and the SCK pin are respectively connected in series with resistors R1, R2 and R3 and then connected to the P2.4, P2.6, P2.5 pins and the NC pin of the main control chip at the control module transmitting end 20 to be suspended; detecting temperature signals of the temperature to be detected by using thermocouples for detecting pins 2 and 3, outputting first-bit data by using an SO pin of the MAX31855 chip 101 when a CS pin is changed from a high level to a low level, wherein the complete temperature data needs 32 clock cycles, and outputting the data of the temperature signals outwards under the action of a clock SCK; since the thermocouple signal is a weak signal, the capacitor C1 and the capacitor C2 are protected from noise interference between the power supply and the ground as much as possible. The thermocouple temperature detection module is a one-way temperature detection module, and can be connected with other thermocouple temperature detection modules through the same connection method, so that the function of multi-way temperature detection is realized. Pins 2 and 3 of the MAX31855 chip 103 are respectively connected to the negative terminal and the positive terminal of the thermocouple 104, and pins SO, CS, and SCK are respectively connected in series with resistors R4, R5, and R6 and then connected to pins P1.2, P1.1, and P1.0 of the main control chip of the control module transmitting terminal 20; pins 2 and 3 of the MAX31855 chip 105 are respectively connected to the negative terminal and the positive terminal of the thermocouple 106, and pins SO, CS, and SCK are respectively connected in series with resistors R7, R8, and R9 and then connected to pins P2.7, P3.0, and P3.1 of the main control chip of the control module transmitting terminal 20; the 2 pins and the 3 pins of the MAX31855 chip 107 are respectively connected to the negative terminal and the positive terminal of the thermocouple 108, and the SO pin, the CS pin and the SCK pin are respectively connected in series with resistors R10, R11 and R12 and then connected to pins P3.5, P3.6 and P3.7 of the main control chip of the control module transmitting terminal 20.

Fig. 3 is a schematic diagram of a transmitting end of a control module circuit according to an embodiment of the present invention. The control module 20 adopts STC89C52 as a main control chip; pins X1 and X2 of a main control chip are connected with pins Y1 of a crystal oscillator, pins C9 and C10 of a capacitor, pins R13 and C11 of a capacitor, pins RESET and EA/VP are connected with pins K1 of a RESET switch, pins P2.4, P2.6 and P2.5 are respectively connected with pins SO, CS and SCK of a MAX31855 chip 101, pins P1.2, P1.1 and P1.0 are respectively connected with pins SO, CS and SCK of a MAX31855 chip 103, pins P2.7, P3.0 and P3.1 are respectively connected with pins SO, CS and SCK of a MAX31855 chip 105, pins P3.5, P3.6 and P3.7 are respectively connected with pins SO, CS and SCK of a MAX31855 chip 107, pins P2.0, P2.1, P2.2 and P2.3, pins P2.3 are respectively connected with pins RS, MISB, PSB 0, PSK 3-P3-3 pins of an LCD 64, PSK-55-3-5, PSK-3 pins are respectively connected with pins RS of an LCD module transmitting terminal 40, a wireless transmitting terminal of an LCD module, a transmitting terminal, a wireless transmitting terminal of an LCD module, a wireless transmitting terminal 3 module, a wireless transmitting terminal 40, a wireless transmitting terminal, driven by the main control chip.

Fig. 4 is a schematic diagram of a receiving end of a control module circuit according to an embodiment of the present invention. The control module 30 adopts STC89C52 as a main control chip; pins X1 and X2 of the main control chip are connected with pins Y1, C9, C10, R13 and C11 of the crystal oscillator, pins RESET and EA/VP are connected with a RESET switch K1, pins P2.0, P2.1, P2.2 and P2.3 are respectively connected with pins RS, RW, E and PSB of an LCD12864 display screen of the receiving end 50 of the display module, pins P0.0-P0.7 are sequentially connected with pins DB0-DB7 of the LCD12864 display screen of the receiving end 50 of the display module, pins P1.3-P1.7 are sequentially connected with pins CE, CSN, MOSI, MISO and SCK of the receiving end 70 of the wireless transparent transmission module, and pin P3.3 is connected with a pin IRQ of the receiving end 70 of the wireless transparent transmission module.

Fig. 5 is a schematic diagram of a transmitting end of a display module circuit according to an embodiment of the present invention. The display module adopts an LCD12864 display screen; the pins DB0-DB7 are sequentially connected with the pins P0.0-P0.7 of the main control chip P of the control module sending end 20, and the pins RS, RW, E and PSB are sequentially connected with the pins P2.0, P2.1, P2.2 and P2.3 of the main control chip P of the control module sending end 20; the main control chip transmits the temperature signal transmitted by the temperature detection module to an LCD12864 display screen through processing, and the LCD12864 display screen displays the temperature value.

Fig. 6 is a schematic diagram of a receiving end of a display module circuit according to an embodiment of the present invention. The display module adopts an LCD12864 display screen; the pins DB0-DB7 are sequentially connected with the pins P0.0-P0.7 of the main control chip P30 of the receiving end of the control module, and the pins RS, RW, E and PSB are sequentially connected with the pins P2.0, P2.1, P2.2 and P2.3 of the main control chip P30 of the receiving end of the control module.

Fig. 7 is a schematic diagram of a transmitting end of a wireless transparent transmission module circuit according to an embodiment of the present invention. The wireless transparent transmission module adopts an E01-ML01DP5 module; the CE, CSN, MOSI, MISO and SCK pins of the E01-ML01DP5 module are sequentially connected with the P1.3-P1.7 pins of the main control chip of the control module sending end 20, and the IRQ pin is connected with the P3.3 pin of the main control chip of the control module sending end 20.

Fig. 8 is a schematic diagram of a receiving end of a wireless transparent transmission module circuit according to an embodiment of the present invention. The wireless transparent transmission module adopts an E01-ML01DP5 module; the CE, CSN, MOSI, MISO and SCK pins of the E01-ML01DP5 module are sequentially connected with the P1.3-P1.7 pins of the main control chip of the control module receiving end 30, and the IRQ pin is connected with the P3.3 pin of the main control chip of the control module receiving end 30.

The external power supply module is provided with a +5V power supply, and the external power supply module provides the +5V power supply for a MAX13855 chip, a main control chip, an LCD12864 display screen and an E01-ML01DP5 module.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.