Single-path temperature acquisition communication protection module

Abstract

The utility model relates to the technical field of temperature acquisition, and discloses a single-path temperature acquisition communication protection module, which comprises a programmable temperature acquisition module; a relay control module; a communication interface module; the communication interface module and the relay control module are electrically connected with the programmable temperature acquisition module. According to the utility model, the programmable temperature acquisition module is designed in an integrated manner, and a protection function is integrated to the module, so that rapid temperature protection response is realized; a high-precision 24-bit ADC analog-to-digital converter is adopted for sampling, a measured value is obtained through digital processing after sampling, serial communication is carried out by using abundant protocols in external communication, most industrial test products can be compatible, universality and practicability are achieved, circuits of an analog acquisition part and a digital part are independently distinguished, analog signals cannot be overlapped with digital signals, and the reliability is high. And the digital signal processing is not interfered.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature acquisition technical field, concretely is single -way temperature acquisition communication protection module. BACKGROUND

[0002] Temperature acquisition refers to the process of converting temperature, a physical quantity, into a measurable, recordable, or transmittable signal through specific equipment or sensors. These signals can be analog (such as voltage or current) or digital.

[0003] Through the retrieval, the patent with the application number CN202411154368.3 discloses a kind of temperature acquisition control protection circuit, including temperature control circuit and protection circuit;In temperature control circuit, modulation signal is input to the control end of transistor Q6 through resistance R28;The control end of transistor Q5 is connected with the input end of transistor Q6 through resistance R24;Transistor Q5 is connected with the first connection end of heating sheet J4, the second connection end of heating sheet J4 is grounded through resistance R33, the second connection end of heating sheet J4 is connected with the positive input end of operational amplifier U4 through resistance R29, the inverting input end of operational amplifier U4 is grounded through resistance R32, the output end of operational amplifier U4 is sequentially grounded through resistance R26 and capacitor C18, the other end of capacitor C18 is used to output heating control voltage to controller;Protection circuit is connected with temperature control circuit, for protecting temperature control circuit.The application protects by real-time temperature monitoring and control, and solves the problem of damage to the measured object caused by high temperature or circuit failure.

[0004] When collecting temperature of product currently, the traditional use scene is to control temperature of product by a temperature acquisition module and a relay module at the same time, but it is not conducive to test due to environmental influence on test performance and response speed, etc.

[0005] Therefore, we need to propose single -way temperature acquisition communication protection module, and integrate the programmable temperature acquisition module, so as to realize fast protection response by integrating protection function into the module itself. INVENTION CONTENT

[0006] The utility model aims at providing single -way temperature acquisition communication protection module, and integrates programmable temperature acquisition module, so as to realize fast temperature protection response by integrating protection function into the module itself;High-precision 24-bit ADC analog-to-digital conversion is used for sampling, and the measured value is obtained after digital processing, serial communication is carried out using rich protocols for external communication, most of the test products in industry can be compatible, and the utility model has universality and practicality, to solve the problems proposed in the above background technology.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: single -way temperature acquisition communication protection module, including,

[0008] The programmable temperature acquisition module is used for collecting the temperature of the product to be tested and converting the temperature signal into a digital signal for processing.

[0009] The relay control module controls the on-off of the circuit according to the signal output by the programmable temperature acquisition module.

[0010] The communication interface module is used for connecting the programmable temperature acquisition module with the host computer and realizing data transmission and remote control.

[0011] The communication interface module and the relay control module are electrically connected with the programmable temperature acquisition module.

[0012] Preferably, the programmable temperature acquisition module comprises an analog-digital conversion chip U2 and a terminal block J2, a capacitor C9 is connected in parallel between the 10th pin and the 11th pin of the analog-digital conversion chip U2, a capacitor C8 and a capacitor C10 are connected in series between the 10th pin and the 11th pin of the analog-digital conversion chip U2, a resistor R6 and a capacitor C27 are connected in series between the 10th pin and the 11th pin of the analog-digital conversion chip U2, and a resistor R8 is connected between the capacitor C10 and the resistor R6.

[0013] Preferably, a resistor R5 is connected between the 12th pin of the analog-digital conversion chip U2 and the 1st pin of the terminal block J2, and a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C7 are connected in parallel to the 12th pin of the analog-digital conversion chip U2.

[0014] Preferably, the communication interface module comprises an SPI_SCK interface connected to the 1st pin of the analog-digital conversion chip U2, an SPI_CS interface connected to the 2nd pin of the analog-digital conversion chip U2, an SPI_MISO interface connected to the 15th pin of the analog-digital conversion chip U2, an SPI_MOSI interface connected to the 16th pin of the analog-digital conversion chip U2, and an SPI_DRDY interface connected to the 14th pin of the analog-digital conversion chip U2.

[0015] Preferably, the relay control module comprises a relay RLY1, a triode Q2 and an optical coupler U9, and a diode D5 and a resistor R26 and a light-emitting diode D7 are connected in parallel between the 1st pin and the 12th pin of the relay RLY1.

[0016] Preferably, the collector of the triode Q2 is connected to the 12th pin of the relay RLY1, the base of the triode Q2 is connected with the emitter through the resistor R24, the base of the triode Q2 is connected with the 3rd pin of the photo-coupler U9 through the resistor R23, and the 2nd pin of the photo-coupler U9 is connected with the resistor R25 connected with the relay RLY1.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1、The utility model discloses integrated programmable temperature acquisition module, and integrates protection function to module itself, thereby realizing fast temperature protection response.

[0019] 2、The utility model discloses adopt high accuracy 24 bit ADC analog digital conversion and sample, and after sampling, obtain the measured value through digital processing, and the external communication uses the abundant protocol and carries out serial communication, can be compatible with most test products of industry, has universality and practicality.

[0020] 3、The utility model discloses analog acquisition part and digital part separate circuit, and analog signal will not overlap with digital signal, and will not interfere with the processing of digital signal. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the circuit diagram of programmable temperature acquisition module and communication interface module of the utility model.

[0022] Fig. 2 It is the circuit diagram of relay control module of the utility model. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figs. 1-2 The utility model provides a technical scheme: single-path temperature acquisition communication protection module, comprising:

[0025] Programmable temperature acquisition module for collecting the temperature of the product to be tested and converting the temperature signal into a digital signal for processing.

[0026] The programmable temperature acquisition module integrates protection functions into the module itself, so as to realize fast protection response, the programmable temperature acquisition module comprises an analog-digital conversion chip U2 and a terminal block J2, a capacitor C9, series-connected capacitors C8 and C10, series-connected resistors R6 and C27 and a resistor R8 are connected in parallel between the 10th pin and the 11th pin of the analog-digital conversion chip U2, and the capacitor C10 and the resistor R8 are connected between the 10th pin and the 11th pin of the analog-digital conversion chip U2.

[0027] A resistor R5 is connected between the 12th pin of the analog-digital conversion chip U2 and the 1st pin of the terminal block J2, and the capacitor C4, the capacitor C5, the capacitor C6 and the capacitor C7 are further connected to the 12th pin of the analog-digital conversion chip U2 in parallel, and an inductor L1 is connected between the capacitor C6 and the capacitor C7.

[0028] The resistor R29, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10 and the inductor L1 jointly constitute a filter circuit for filtering noise and interference and ensuring stable operation of the analog-digital conversion chip U2. The resistor R5, the resistor R6, the resistor R7 and the resistor R8 are used for inputting external analog signals to the analog-digital conversion chip U2 for processing.

[0029] The analog acquisition part and the digital part of the programmable temperature acquisition module are separately distinguished from the circuit, the analog signal will not overlap with the digital signal, and the processing of the digital signal is not interfered.

[0030] The relay control module controls the on-off of the relay according to the signal output by the programmable temperature acquisition module;

[0031] The relay control module comprises a relay RLY1, a transistor Q2 and an optical coupler U9, and a diode D5 and a series-connected resistor R26 and a light-emitting diode D7 are connected in parallel between the 1st pin and the 12th pin of the relay RLY1.

[0032] The collector of the transistor Q2 is connected to the 12th pin of the relay RLY1, a resistor R24 is connected between the base and the emitter of the transistor Q2, a resistor R23 is connected between the base of the transistor Q2 and the 3rd pin of the optical coupler U9, and a resistor R25 connected with the relay RLY1 is connected to the 2nd pin of the optical coupler U9.

[0033] In the relay RLY1: RLY-NO is a normally open contact, RLY-NC is a normally closed contact, RLY-C is a common terminal, the 4th pin of the optical coupler U9 is connected to a power supply to provide the voltage required by the relay and the circuit, the diode D5 can prevent the reverse voltage generated by the relay coil when power off from damaging the circuit, the optical coupler U9 is used for isolating the input signal and the output circuit to prevent interference, and the transistor Q2 is used for amplifying the output signal of the optical coupler to drive the relay.

[0034] Resistor R23 is a current limiting resistor, limiting the current of optocoupler U9, resistor R24 is a base bias resistor, providing bias current for triode Q2, resistor R26 is a current limiting resistor, limiting the current of optocoupler U9;

[0035] Diode D7 bright green light, used to indicate the working state of the circuit, resistor R25 is a current limiting resistor, used to limit the current of optocoupler U9.

[0036] A communication interface module for connecting the programmable temperature acquisition module with the host computer and realizing data transmission and remote control;

[0037] The communication interface module comprises an SPI_SCK interface connected to pin 1 of an analog-digital conversion chip U2, an SPI_CS interface connected to pin 2 of the analog-digital conversion chip U2, an SPI_MISO interface connected to pin 15 of the analog-digital conversion chip U2, an SPI_MOSI interface connected to pin 16 of the analog-digital conversion chip U2, and an SPI_DRDY interface connected to pin 14 of the analog-digital conversion chip U2, and the pin 14 of the analog-digital conversion chip U2 is further connected with a resistor R29 connected to 3.3V.

[0038] The communication interface module: external communication uses rich protocols for serial communication, and can be compatible with most industrial test products, and has universality and practicality.

[0039] The SPI interface is a commonly used serial communication protocol, and is widely used in the connection and data transmission of digital circuits and analog circuits. The main features of the SPI interface include high-speed transmission, full-duplex communication and flexible device connection mode.

[0040] The SPI interface is commonly used for connecting ADC to realize the conversion of analog signals to digital signals. The SPI interface is not limited to ADC, but can also be used for the control and data transmission of other analog devices. The SPI interface supports daisy chain connection of multiple devices, improves the expansibility and flexibility of the system, and can connect multiple devices through the SPI interface.

[0041] The communication interface module and the relay control module are electrically connected with the programmable temperature acquisition module.

[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A single-channel temperature acquisition communication protection module, characterized in that, It comprises: A programmable temperature acquisition module for collecting the temperature of the product to be tested and converting the temperature signal into a digital signal for processing; A relay control module for controlling the on-off of the circuit according to the signal output by the programmable temperature acquisition module; A communication interface module for connecting the programmable temperature acquisition module with the upper computer and realizing data transmission and remote control; The communication interface module and the relay control module are electrically connected with the programmable temperature acquisition module.

2. The single-channel temperature acquisition communication protection module according to claim 1, characterized in that: The programmable temperature acquisition module comprises an analog-digital conversion chip U2 and a terminal block J2, a capacitor C9 is connected in parallel between the 10th pin and the 11th pin of the analog-digital conversion chip U2, a capacitor C8 and a capacitor C10 are connected in series between the 10th pin and the 11th pin of the analog-digital conversion chip U2, a resistor R6 and a capacitor C27 are connected in series between the 10th pin and the 11th pin of the analog-digital conversion chip U2, and a resistor R8 is connected between the capacitor C10 and the resistor R8, and the two ends of the capacitor C27 are connected between the 1st pin and the 2nd pin of the terminal block J1.

3. The single-channel temperature acquisition communication protection module according to claim 2, characterized in that: A resistor R5 is connected between the 12th pin of the analog-digital conversion chip U2 and the 1st pin of the terminal block J2, and a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C7 are further connected in parallel to the 12th pin of the analog-digital conversion chip U2, and an inductor L1 is connected between the capacitor C6 and the capacitor C7.

4. The single-channel temperature acquisition communication protection module according to claim 3, characterized in that: The communication interface module comprises an SPI_SCK interface connected to the 1st pin of the analog-digital conversion chip U2, an SPI_CS interface connected to the 2nd pin of the analog-digital conversion chip U2, an SPI_MISO interface connected to the 15th pin of the analog-digital conversion chip U2, an SPI_MOSI interface connected to the 16th pin of the analog-digital conversion chip U2, an SPI_DRDY interface connected to the 14th pin of the analog-digital conversion chip U2, and a resistor R29 connected to the 14th pin of the analog-digital conversion chip U2 and connected to 3.3V.

5. The single-channel temperature acquisition communication protection module according to claim 4, characterized in that: The relay control module comprises a relay RLY1, a triode Q2 and an optical coupler U9, and a diode D5 and a resistor R26 and a light-emitting diode D7 are connected in parallel between the 1st pin and the 12th pin of the relay RLY1.

6. The single-channel temperature acquisition communication protection module according to claim 5, characterized in that: The collector of the triode Q2 is connected to the 12th pin of the relay RLY1, a resistor R24 is connected between the base and the emitter of the triode Q2, a resistor R23 is connected between the base of the triode Q2 and the 3rd pin of the optical coupler U9, and a resistor R25 connected with the relay RLY1 is connected to the 2nd pin of the optical coupler U9.

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