WO2022041045A1

WO2022041045A1 - Anti-static protection system for internet of things communication and protection method

Info

Publication number: WO2022041045A1
Application number: PCT/CN2020/111741
Authority: WO
Inventors: 陈勇; 李隽诗; 李凯; 田敏; 申彦; 段向军; 孙刚; 范迪; 任可欣
Original assignee: 南京龙渊众创信息科技股份有限公司; 江苏意渊工业大数据平台有限公司; 南京泰慧联电子科技有限公司
Priority date: 2020-08-26
Filing date: 2020-08-27
Publication date: 2022-03-03
Also published as: CN112186709A; CN112186709B

Abstract

An anti-static protection system for Internet of Things communication and a protection method. The system comprises an acquisition and detection unit, a central control unit, a power management unit, a circuit protection unit, a wireless transmission unit, and an interface unit; the circuit protection unit comprises a temperature measurement module and a humidity measurement module; the interface unit comprises an LC oscillation module, a protection output module, and a photoelectric isolation module. According to the present invention, temperature measurement and humidity measurement are performed on an electrical room in intelligent building engineering, the interface unit will output, by means of the LC oscillation module, a signal which is stable in amplitude and frequency, and then the photoelectric isolation module achieves the purpose of isolating field interference; finally, the protection output module performs drive output.

Description

An anti-static protection system and protection method for Internet of Things communication

technical field

The invention relates to the field of Internet of Things communication, and discloses an anti-static protection system and a protection method for Internet of Things communication.

Background technique

With the development of the Internet of Things era and the popularization of 5G applications, and the policy requirements of my country's sustainable development to reduce carbon emissions, it can be seen that the management of building energy consumption is still urgent and urgent, according to the basic research report on building energy consumption. Now smart building projects have become a new development trend in cities, which can speed up the development of cities and thus promote the rapid development of the country.

In intelligent building engineering, alarm system, linkage system, video surveillance system, garage management system, intrusion alarm system, entrance and exit control, digital information analysis and processing are the key layout areas of the security industry, and also the key demand part of building intelligence. Because these areas have high technical content and are related to the safety of life and property of enterprises and owners, they cannot be neglected. Second, because of the high integration requirements in these fields, professional solutions are needed to meet the needs.

The Internet of Things communication in the prior art is equipped with an electric room, and each floor is equipped with an independent electric room. When the electric room is supplying power, large and small static electricity will be generated due to different humidity and temperature. It will interfere with the supply of electricity, and in severe cases, surges will occur, which will cause great interference in the control signals inside the intelligent building project, and in severe cases, it will affect office equipment.

technical problem

An anti-static protection system and protection method for Internet of Things communication are provided to solve the above problems.

technical solutions

An anti-static protection system and protection method for Internet of Things communication, comprising:

The acquisition and detection unit used for various signal detection and acquisition in the intelligent building project;

A central control unit for intelligent building engineering system control and signal processing;

A power management unit for power supply and power distribution management for intelligent building projects;

It is a circuit protection unit used to protect the single working circuit of the power management of intelligent building projects and to perform circuit detection at the same time;

A wireless transmission unit for transmission of detection signals and acquisition signals;

An interface unit for connecting the central control unit with the workload and for signal transmission;

The circuit protection unit includes: a temperature detection module and a humidity detection module; the interface unit includes: an LC oscillation module, a protection output module, and a photoelectric isolation module.

In a real-time example, the temperature detection module includes: a temperature sensor U1, a transistor Q1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a resistor R5, a resistor R6, a capacitor C3, a capacitor C2, an operational amplifier U3A, a stable voltage device U2; wherein, the No. 2 pin of the temperature sensor U1 is simultaneously connected to the base of the transistor Q1, one end of the resistor R2 and one end of the capacitor C1, and the No. 3 lead of the temperature sensor U1 The pin is connected to the other end of the capacitor C1, one end of the resistor R1 and one end of the resistor R4 at the same time, and the No. 1 pin of the temperature sensor U1 is connected to the emitter of the transistor Q1 and the resistor R1 at the same time. The other end of the operational amplifier U3A is connected to the other end of the resistor R2, the other end of the resistor R3 and the other end of the resistor R5 are connected at the same time, and the No. 3 pin of the operational amplifier U3A is connected. The pin is connected to one end of the resistor R6, the No. 8 pin of the operational amplifier U3A is connected to one end of the capacitor C3 and the other end of the resistor R4 at the same time and input signals, and the other end of the capacitor C3 is grounded, The No. 1 pin of the operational amplifier U3A is simultaneously connected to the other end of the resistor R6 and outputs a signal, and the No. 4 pin of the operational amplifier U3A is simultaneously connected to one end of the capacitor C2 and the voltage regulator U2. Pin 1 is connected and input voltage, and pin 2 of the voltage regulator U2 is grounded.

In a real-time example, the humidity detection module includes: humidity sensor U4, capacitor C4, resistor R7, resistor R8, transistor Q2, adjustable resistor RV1, transistor Q3, resistor R9, resistor R11, resistor R10, operational amplifier U5A, operational amplifier U6A, operational amplifier U6A; wherein, the No. 2 pin of the humidity sensor U4 is connected to one end of the capacitor C4 and input voltage, the No. 3 pin of the humidity sensor U4 is grounded, and the No. 1 pin of the humidity sensor U4 The pin is connected to one end of the resistor R7 and one end of the resistor R8 at the same time, the other end of the capacitor C4 is grounded, and the other end of the resistor R7 is connected to one end and the control end of the adjustable resistor RV1, so the The No. 3 pin of the operational amplifier U5A is simultaneously connected with the other end of the adjustable resistor RV1 and the collector and base of the triode Q3, the emitter of the triode Q3 is grounded, and the No. 2 of the operational amplifier U5A The pin and the No. 1 pin are connected with one end of the resistor R9, and the other end of the resistor R8 is connected with the No. 3 pin of the operational amplifier U6A and the base and collector of the transistor Q2 at the same time. The emitter of the transistor Q2 is grounded, the No. 2 pin and No. 1 pin of the operational amplifier U6A are connected to one end of the resistor R10, and the No. 2 pin of the operational amplifier U7A is connected to the other end of the resistor R9 , the No. 3 pin of the operational amplifier U7A is connected to the other end of the resistor R10 and one end of the resistor R11 at the same time, the other end of the resistor R11 is grounded, and the No. 1 pin of the operational amplifier U7A is output.

In a real-time example, the protection output module includes: transistor Q6, resistor R14, capacitor C6, capacitor C7, diode D1, resistor R15, capacitor C5, resistor R13, resistor R12, MOS transistor Q4, MOS transistor Q5, capacitor C8, diode D2, diode D3, interface J1, driver chip U8; wherein, the No. 3 pin of the driver chip U8 is connected to one end of the capacitor C6, one end of the resistor R14 and the collector of the transistor Q6 at the same time, so The No. 2 pin of the driver chip U8 is connected to the other end of the resistor R14, the No. 1 pin of the driver chip U8 is connected to one end of the capacitor C7, and the No. 4 pin of the driver chip U8 is simultaneously connected to the The other end of the capacitor C6 is connected to the emitter of the transistor Q6, the base of the transistor Q6 inputs a signal, and the anode of the diode D1 is connected to the other end of the capacitor C7 and one end of the resistor R15 at the same time, so The No. 8 pin of the driver chip U8 is connected to one end of the capacitor C5 and the negative electrode of the diode D1 at the same time, the No. 7 pin of the driver chip U8 is connected to one end of the resistor R13, and the driver chip U8 The No. 5 pin is connected to one end of the resistor R12, and the No. 6 pin of the driver chip U8 is simultaneously connected to the other end of the capacitor C5, the drain of the MOS transistor Q4, and the source of the MOS transistor Q5. The anode of the diode D3 is connected to the No. 2 pin of the interface J1, the other end of the resistor R13 is connected to the gate of the MOS transistor Q4, and the other end of the resistor R12 is connected to the MOS transistor The gate of Q5 is connected, the source of the MOS transistor Q4 is connected to the other end of the resistor R15 and the one end of the capacitor C8 at the same time and input voltage, and the other end of the capacitor C8 is connected to the other end of the MOS transistor Q5 at the same time. The drain is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the cathode of the diode D3, and the No. 4 pin of the driver chip U8 is also connected to the other end of the capacitor C7 and the MOS The drain of the tube Q5 is connected, the No. 1 pin of the interface J1 inputs a voltage, and the No. 3 pin of the interface J1 is grounded.

In a real-time example, the LC oscillation module includes: a transformer TR1, a capacitor C9, a resistor R18, a transistor Q7, a capacitor C11, a resistor R17, a capacitor C10, a resistor R16, and a resistor R17; wherein, the input end of the transformer TR1 is connected to all the One end of the capacitor C9 is connected to one end of the resistor R18 and a signal is input, and the other end of the input of the transformer TR1 is connected to the other end of the capacitor C9, the collector of the transistor Q7 and one end of the capacitor C11 at the same time. and output, one end of the output of the transformer TR1 is simultaneously connected to one end of the capacitor C10, one end of the resistor R16 and one end of the resistor R17, and one end of the resistor R16 is grounded, and the other end of the output of the transformer TR1 is grounded , the base of the transistor Q7 is simultaneously connected to the other end of the resistor R18, the other end of the capacitor C11 and the other end of the resistor R17, and the emitter of the transistor Q7 is simultaneously connected to the other end of the resistor R16. One end is connected to the other end of the capacitor C10.

In a real-time example, the optoelectronic isolation module includes: a diode D4, a diode D5, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a transistor Q8, a transistor Q9, an optocoupler U9, and a transistor Q10; wherein the diode D4 has a Positive input signal, the cathode of the diode D4 is connected to the collector of the transistor Q8, the collector of the transistor Q9 and one end of the resistor R19 at the same time, and the base of the transistor Q9 is connected to the resistor R19 at the same time. The other end is connected to the cathode of the diode D5, the emitter of the transistor Q9 is connected to the base of the transistor Q8, the emitter of the transistor Q8 is connected to one end of the resistor R20, the optocoupler U9 The No. 1 pin is connected to the other end of the resistor R20, the No. 2 pin of the optocoupler U9 is connected to the anode of the diode D5, and the No. 4 pin of the optocoupler U9 is connected to the resistor. One end of R22 is connected, the No. 3 pin of the optocoupler U9 is connected to one end of the resistor R21 and the base of the transistor Q10 at the same time, and the collector of the transistor Q10 is connected to the other end of the resistor R22 And to output a signal, the emitter of the transistor Q10 is connected to the other end of the resistor R21 and grounded.

In a real-time example, the model of the driver chip U8 is IR2106S.

A protection method for an anti-static protection system for Internet of Things communication, the protection method is specifically divided into the following steps:

Step 1. When the intelligent building project is working normally, the collection and detection unit collects the situation inside the building, works through various sensors and sensing elements, and at the same time wirelessly transmits the collected detection signal to the central control unit through the Internet of Things technology;

Step 2. The power management unit supplies power to various loads and circuits inside the building. At the same time, when supplying power, the circuit protection unit detects the temperature and humidity inside the power room to prevent static electricity from being generated;

Step 3, the central control unit receives the signal, converts and decodes the signal at the same time, so as to understand the internal situation of the building, and at the same time transmits the digital signal to various control terminals through the interface unit;

Step 4: The interface unit transmits the numbers to the control terminal, and during the transmission, protects the transmission signal and improves the stability.

In a real-time example, according to step 2, it can be further obtained:

Step 5. The working voltage is regulated by the input voltage stabilizer U2, and output through the No. 3 pin of the voltage stabilizer U2, and the resistor R2, the resistor R3 and the transistor Q1 form a shunt circuit, so that the working voltage is input to the temperature sensor U1 Work, use the temperature sensor U1 for temperature acquisition, and the collected signal is stably output through the input operational amplifier U3A, while the resistor R3 controls and protects the temperature sensor U1, and the resistor R6 adjusts the gain value of the operational amplifier, and the final temperature signal passes through the operational amplifier U3A. 1 pin for output to the central control unit;

Step 6. The working voltage is input through the No. 2 pin of the humidity sensor U4, the capacitor C4 performs filtering, and the humidity sensor U4 collects the external humidity. Because the humidity sensor U4 has two sensing pins, the signal passes through the No. 1 lead of the humidity sensor U4. The output of the pin is carried out separately through the resistance R7 and the resistance R8, and the signal is buffered and output through the operational amplifier U5A and the operational amplifier U6A. At this time, the resistance R10 and the resistance R9 change the sensitivity of the humidity sensor U4. At the same time, the two humidity signals are calculated by the input. Amplifier U7A performs differential amplification and outputs to the central control unit.

In a real-time example, according to step 4, it can be further obtained:

Step 7. When the signal is transmitted to the control terminal, the interface oscillates the input voltage signal through the LC, and the voltage flows through the resistor R17 and the resistor R18 to divide the voltage, thereby increasing the appropriate working voltage for the base of the transistor Q7, and the transistor Q7 starts to work at In the amplification state, at the same time, the capacitor C9 loaded by the transistor Q7 and the input end of the transformer TR1 start to work, while the capacitor C11 performs input coupling, and the resistor R16 feeds back the static operating point of the transistor Q7, thereby reducing signal distortion, and the signal passes through the transistor. The collector output of Q7 completes the signal oscillation. At this time, the output coil of the transformer TR1 is used as the signal feedback end;

Step 8. At the same time, the working voltage is input to the circuit through the diode D4. At this time, the transistor Q9 and the transistor Q8 form a voltage regulator circuit. The diode D5 provides the reference reference voltage, the resistor R10 protects, and the voltage signal is protected by the resistor R2. The input photocoupler U9, thus The photocoupler U9 works and outputs through pin 3. At this time, the base of the transistor Q10 is energized, so that the transistor Q10 is turned on, thereby outputting the voltage;

Step 9. At this time, the base input signal of the transistor Q6 in the output module is protected, and the working voltage is input through one end of the capacitor C8. At this time, the driver chip U8 outputs the signal internally and controls the input voltage, and the diode D2 and the diode D3 form an ESD When the protection array is generated by static electricity and affects the rise of the interface voltage and noise, the ESD protection array is triggered to protect the circuit and drive the chip U8.

beneficial effect

The present invention performs temperature detection and humidity detection on the electrical room in the Internet of Things communication, and transmits the humidity signal and the temperature signal to the control terminal, so as to facilitate the staff to observe and adjust, and at the same time, the central control unit performs the detection of the analog signal. When these digital signals are converted into digital signals, and these digital signals are transmitted to the interface of each control terminal, the interface unit will generate a high-frequency sine wave signal through the LC oscillation module, so as to finally output a signal with a relatively stable amplitude and frequency. At the same time, the photoelectric isolation module Isolate the interference source and the parts susceptible to interference from the circuit, so that the measurement and control device only maintains signal contact with the site without direct electrical contact, so as to achieve the purpose of isolating on-site interference; finally, drive the output through the protection output module. , and at the same time, the ESD protection array is used for anti-static protection output, so that the present invention greatly protects the signal interference problem and signal mixing problem caused by static electricity. At the same time, when the static electricity is too large, ESD protection can be used to effectively protect the output interface. , to prevent damage to office equipment, and to conduct temperature and humidity detection in each electrical room, thereby greatly reducing the generation of static electricity.

Description of drawings

Fig. 1 is the working schematic diagram of the present invention.

FIG. 2 is a circuit diagram of a temperature detection module of the present invention.

FIG. 3 is a circuit diagram of a humidity detection module of the present invention.

FIG. 4 is a circuit diagram of the protection output module of the present invention.

FIG. 5 is a circuit diagram of the LC oscillation module of the present invention.

FIG. 6 is a circuit diagram of the optoelectronic isolation module of the present invention.

FIG. 7 is a circuit connection diagram of the interface unit of the present invention.

Embodiments of the present invention

As shown in FIG. 1, in this embodiment, an anti-static protection system and protection method for Internet of Things communication includes: a collection and detection unit, a central control unit, a power management unit, a circuit protection unit, a wireless transmission unit, and an interface unit; wherein the circuit protection unit includes: a temperature detection module and a humidity detection module; the interface unit includes: an LC oscillation module, a protection output module, and an optoelectronic isolation module.

As shown in Figure 2, the temperature detection module includes: temperature sensor U1, transistor Q1, resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1, resistor R5, resistor R6, capacitor C3, capacitor C2, operational amplifier U3A, stable voltage regulator U2.

As shown in Figure 3, the humidity detection module includes: humidity sensor U4, capacitor C4, resistor R7, resistor R8, transistor Q2, adjustable resistor RV1, transistor Q3, resistor R9, resistor R11, resistor R10, operational amplifier U5A, operational amplifier U6A, operational amplifier U6A.

As shown in Figure 4, the protection output module includes: transistor Q6, resistor R14, capacitor C6, capacitor C7, diode D1, resistor R15, capacitor C5, resistor R13, resistor R12, MOS tube Q4, MOS tube Q5, capacitor C8, diode D2, diode D3, interface J1, driver chip U8.

As shown in Figure 5, the LC oscillation module includes: a transformer TR1, a capacitor C9, a resistor R18, a transistor Q7, a capacitor C11, a resistor R17, a capacitor C10, a resistor R16, and a resistor R17.

As shown in Figure 6, the optoelectronic isolation module includes: diode D4, diode D5, resistor R19, resistor R20, resistor R21, resistor R22, transistor Q8, transistor Q9, optocoupler U9, and transistor Q10.

In a further embodiment, the No. 2 pin of the temperature sensor U1 is connected to the base of the transistor Q1, one end of the resistor R2 and one end of the capacitor C1 at the same time, and the No. 3 pin of the temperature sensor U1 The pin is connected to the other end of the capacitor C1, one end of the resistor R1 and one end of the resistor R4 at the same time, and the No. 1 pin of the temperature sensor U1 is connected to the emitter of the transistor Q1 and the resistor at the same time. The other end of R1 is connected, the No. 2 pin of the operational amplifier U3A is connected to the other end of the resistor R2, the other end of the resistor R3 and one end of the resistor R5 at the same time, and the No. 3 pin of the operational amplifier U3A The pin is connected to one end of the resistor R6, the No. 8 pin of the operational amplifier U3A is connected to one end of the capacitor C3 and the other end of the resistor R4 at the same time and input signals, and the other end of the capacitor C3 is grounded , the No. 1 pin of the operational amplifier U3A is simultaneously connected to the other end of the resistor R6 and outputs a signal, and the No. 4 pin of the operational amplifier U3A is simultaneously connected to one end of the capacitor C2 and the voltage stabilizer U2 pin 1 is connected and input voltage, pin 2 of the voltage regulator U2 is grounded.

In a further embodiment, the No. 2 pin of the humidity sensor U4 is connected to one end of the capacitor C4 and input voltage, the No. 3 pin of the humidity sensor U4 is grounded, and the No. 1 pin of the humidity sensor U4 The pin is connected to one end of the resistor R7 and one end of the resistor R8 at the same time, the other end of the capacitor C4 is grounded, and the other end of the resistor R7 is connected to one end and the control end of the adjustable resistor RV1. The No. 3 pin of the operational amplifier U5A is simultaneously connected with the other end of the adjustable resistor RV1 and the collector and base of the transistor Q3, the emitter of the transistor Q3 is grounded, and the No. 2 pin of the operational amplifier U5A is connected. The pin and the No. 1 pin are connected with one end of the resistor R9, and the other end of the resistor R8 is connected with the No. 3 pin of the operational amplifier U6A and the base and collector of the transistor Q2 at the same time. The emitter of Q2 is grounded, the No. 2 pin and No. 1 pin of the operational amplifier U6A are connected to one end of the resistor R10, and the No. 2 pin of the operational amplifier U7A is connected to the other end of the resistor R9, The No. 3 pin of the operational amplifier U7A is connected to the other end of the resistor R10 and one end of the resistor R11 at the same time, the other end of the resistor R11 is grounded, and the No. 1 pin of the operational amplifier U7A is output.

In a further embodiment, one end of the input of the transformer TR1 is connected to one end of the capacitor C9 and one end of the resistor R18 at the same time to input a signal, and the other end of the input of the transformer TR1 is simultaneously connected to the other end of the capacitor C9 One end, the collector of the transistor Q7 and one end of the capacitor C11 are connected and output, and the output end of the transformer TR1 is simultaneously connected to one end of the capacitor C10, one end of the resistor R16 and one end of the resistor R17. , and one end of the resistor R16 is grounded, the other end of the output of the transformer TR1 is grounded, the base of the transistor Q7 is connected to the other end of the resistor R18, the other end of the capacitor C11 and the other end of the resistor R17 at the same time connected, the emitter of the transistor Q7 is connected to the other end of the resistor R16 and the other end of the capacitor C10 at the same time.

In a further embodiment, the anode of the diode D4 is input with a signal, and the cathode of the diode D4 is connected to the collector of the transistor Q8, the collector of the transistor Q9 and one end of the resistor R19 at the same time, and the The base of the transistor Q9 is connected to the other end of the resistor R19 and the cathode of the diode D5 at the same time, the emitter of the transistor Q9 is connected to the base of the transistor Q8, and the emitter of the transistor Q8 is connected to the One end of the resistor R20 is connected, the No. 1 pin of the optocoupler U9 is connected to the other end of the resistor R20, the No. 2 pin of the optocoupler U9 is connected to the anode of the diode D5, and the optoelectronic The No. 4 pin of the coupler U9 is connected to one end of the resistor R22, and the No. 3 pin of the optocoupler U9 is simultaneously connected to one end of the resistor R21 and the base of the transistor Q10, and the transistor Q10 The collector of the transistor Q10 is connected to the other end of the resistor R22 and outputs a signal, and the emitter of the transistor Q10 is connected to the other end of the resistor R21 and grounded.

In a further embodiment, the No. 3 pin of the driving chip U8 is simultaneously connected to one end of the capacitor C6, one end of the resistor R14 and the collector of the transistor Q6, and the No. 2 pin of the driving chip U8 The pin is connected to the other end of the resistor R14, the No. 1 pin of the driver chip U8 is connected to one end of the capacitor C7, and the No. 4 pin of the driver chip U8 is connected to the other end of the capacitor C6 at the same time. It is connected to the emitter of the transistor Q6, the base of the transistor Q6 inputs a signal, the anode of the diode D1 is connected to the other end of the capacitor C7 and one end of the resistor R15 at the same time, and the No. 8 of the driver chip U8 The pin is connected to one end of the capacitor C5 and the negative electrode of the diode D1 at the same time, the No. 7 pin of the driver chip U8 is connected to one end of the resistor R13, and the No. 5 pin of the driver chip U8 is connected to the One end of the resistor R12 is connected, and the No. 6 pin of the driver chip U8 is simultaneously connected to the other end of the capacitor C5, the drain of the MOS transistor Q4, the source of the MOS transistor Q5, and the diode D3. The positive pole is connected to the No. 2 pin of the interface J1, the other end of the resistor R13 is connected to the gate of the MOS transistor Q4, and the other end of the resistor R12 is connected to the gate of the MOS transistor Q5, so the The source of the MOS transistor Q4 is connected to the other end of the resistor R15 and the one end of the capacitor C8 at the same time and input voltage, and the other end of the capacitor C8 is simultaneously connected to the drain of the MOS transistor Q5 and the diode D2. The positive pole of the diode D2 is connected to the negative pole of the diode D3, the No. 4 pin of the driver chip U8 is also connected to the other end of the capacitor C7 and the drain of the MOS tube Q5 at the same time, The No. 1 pin of the interface J1 is input voltage, and the No. 3 pin of the interface J1 is grounded.

Working principle: When the intelligent building project works, the power management module inside the power room works, so that the main power room outputs voltage to each sub-power room, so that the sub-power room supplies power to each floor, and the temperature inside the power room is at the same time. The detection module and the humidity detection module work, the working voltage is regulated by the input voltage stabilizer U2, and output through the No. 3 pin of the voltage stabilizer U2, and the resistor R2, the resistor R3 and the transistor Q1 form a shunt circuit, thus The working voltage is input to the temperature sensor U1 to work, and the temperature sensor U1 is used for temperature acquisition, and the collected signal is input to the operational amplifier U3A for stable output, while the resistance R3 is used to control and protect the temperature sensor U1, and the resistance R6 is used to adjust the gain value of the operational amplification, and finally The temperature signal is output to the central control unit through the No. 1 pin of the operational amplifier U3A; the working voltage is input through the No. 2 pin of the humidity sensor U4, the capacitor C4 filters, and the humidity sensor U4 collects the external humidity, because the humidity sensor U4 is composed of There are two sensing pins, so that the signal is output through the No. 1 pin of the humidity sensor U4, and is transmitted separately through the resistor R7 and the resistor R8. The signal is buffered and output through the operational amplifier U5A and the operational amplifier U6A. At this time, the resistor R10 and the resistor R9 Change the sensitivity of the humidity sensor U4, and at the same time, the two humidity signals are differentially amplified and output to the central control unit through the input operational amplifier U7A;

At the same time, the acquisition and detection unit in each floor uses external sensors to detect the acquisition signal, and the analog signal collected here is transmitted to the central control unit through the wireless transmission unit. The central control unit converts the acquired analog signal, and the output digital signal passes through The interface unit transmits to each load interface;

When the signal is transmitted to the control terminal, the interface oscillates the input voltage signal through the LC, and the voltage flows through the resistor R17 and the resistor R18 to divide the voltage, thereby increasing the appropriate working voltage for the base of the transistor Q7, and the transistor Q7 starts to work in the amplifying state. At the same time, the capacitor C9, which is the load of the transistor Q7, and the input end of the transformer TR1 start to work. At the same time, the capacitor C11 performs input coupling, and the resistor R16 feeds back the static operating point of the transistor Q7, thereby reducing the signal distortion, and the signal passes through the collector of the transistor Q7. Electrode output, so as to complete the signal oscillation. At this time, the output coil of the transformer TR1 is used as the signal feedback terminal; at the same time, the working voltage is input to the circuit through the diode D4. At this time, the transistor Q9 and the transistor Q8 form a voltage regulator circuit, the diode D5 provides the reference voltage, and the resistance R10 is protected, and the voltage signal is protected by the resistor R2 and is input to the photocoupler U9, so the photocoupler U9 works and is output through the No. 3 pin. At this time, the base of the transistor Q10 is energized, so that the transistor Q10 is turned on, thereby Output voltage; at this time, the base input signal of the transistor Q6 in the output module is protected, and the working voltage is input through one end of the capacitor C8. At this time, the driver chip U8 outputs the signal internally and controls the input voltage, and the diode D2 and the diode D3 form an ESD When the protection array is generated by static electricity and affects the rise of the interface voltage and noise, the ESD protection array is triggered to protect the circuit and drive the chip U8.

In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction. In order to avoid unnecessary repetition, the present invention will not describe various possible combinations.

Claims

An anti-static protection system for Internet of Things communication, characterized in that it includes:

The acquisition and detection unit used for various signal detection and acquisition in the intelligent building project;

A central control unit for intelligent building engineering system control and signal processing;

A power management unit for power supply and power distribution management for intelligent building projects;

It is a circuit protection unit used to protect the single working circuit of the power management of intelligent building projects and to perform circuit detection at the same time;

A wireless transmission unit for transmission of detection signals and acquisition signals;

An interface unit for connecting the central control unit to the workload and for signal transmission.
The anti-static protection system for Internet of Things communication according to claim 1, wherein the circuit protection unit comprises: a temperature detection module and a humidity detection module;

The temperature detection module includes: temperature sensor U1, transistor Q1, resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1, resistor R5, resistor R6, capacitor C3, capacitor C2, operational amplifier U3A, voltage regulator U2; wherein, the No. 2 pin of the temperature sensor U1 is simultaneously connected to the base of the transistor Q1, one end of the resistor R2 and one end of the capacitor C1, and the No. 3 pin of the temperature sensor U1 is simultaneously connected Connect to the other end of the capacitor C1, one end of the resistor R1 and one end of the resistor R4, and the No. 1 pin of the temperature sensor U1 is connected to the emitter of the transistor Q1 and the other end of the resistor R1 at the same time. One end is connected, the No. 2 pin of the operational amplifier U3A is connected to the other end of the resistance R2, the other end of the resistance R3 and one end of the resistance R5 at the same time, and the No. 3 pin of the operational amplifier U3A is connected to One end of the resistor R6 is connected, the No. 8 pin of the operational amplifier U3A is connected to one end of the capacitor C3 and the other end of the resistor R4 at the same time and input signals, the other end of the capacitor C3 is grounded, and the The No. 1 pin of the operational amplifier U3A is simultaneously connected to the other end of the resistor R6 and outputs a signal, and the No. 4 pin of the operational amplifier U3A is simultaneously connected to one end of the capacitor C2 and the No. 1 pin of the voltage stabilizer U2. The pin is connected and input voltage, pin 2 of the voltage regulator U2 is grounded.
The anti-static protection system for Internet of Things communication according to claim 2, wherein the humidity detection module comprises: a humidity sensor U4, a capacitor C4, a resistor R7, a resistor R8, a transistor Q2, an adjustable resistor RV1, transistor Q3, resistor R9, resistor R11, resistor R10, operational amplifier U5A, operational amplifier U6A, operational amplifier U6A; wherein, the No. 2 pin of the humidity sensor U4 is connected to one end of the capacitor C4 and the input voltage, The No. 3 pin of the humidity sensor U4 is grounded, the No. 1 pin of the humidity sensor U4 is connected to one end of the resistor R7 and one end of the resistor R8 at the same time, the other end of the capacitor C4 is grounded, and the The other end of the resistor R7 is connected to one end and the control end of the adjustable resistor RV1, and the No. 3 pin of the operational amplifier U5A is connected to the other end of the adjustable resistor RV1 and the collector and base of the transistor Q3 at the same time. The poles are connected, the emitter of the transistor Q3 is grounded, the No. 2 pin and No. 1 pin of the operational amplifier U5A are connected to one end of the resistor R9, and the other end of the resistor R8 is connected to the operational amplifier U6A at the same time. The No. 3 pin is connected with the base and collector of the transistor Q2, the emitter of the transistor Q2 is grounded, and the No. 2 pin and the No. 1 pin of the operational amplifier U6A are connected with one end of the resistor R10 , the No. 2 pin of the operational amplifier U7A is connected to the other end of the resistor R9, the No. 3 pin of the operational amplifier U7A is connected to the other end of the resistor R10 and one end of the resistor R11 at the same time, so The other end of the resistor R11 is grounded, and the No. 1 pin of the operational amplifier U7A is output.
The anti-static protection system for Internet of Things communication according to claim 1, wherein the interface unit comprises: an LC oscillation module, a protection output module, and a photoelectric isolation module;

The protection output module includes: transistor Q6, resistor R14, capacitor C6, capacitor C7, diode D1, resistor R15, capacitor C5, resistor R13, resistor R12, MOS tube Q4, MOS tube Q5, capacitor C8, diode D2, Diode D3, interface J1, driver chip U8; wherein, the No. 3 pin of the driver chip U8 is simultaneously connected to one end of the capacitor C6, one end of the resistor R14 and the collector of the transistor Q6, and the driver The No. 2 pin of the chip U8 is connected to the other end of the resistor R14, the No. 1 pin of the driving chip U8 is connected to one end of the capacitor C7, and the No. 4 pin of the driving chip U8 is connected to the The other end of the capacitor C6 is connected to the emitter of the transistor Q6, the base of the transistor Q6 inputs a signal, and the anode of the diode D1 is connected to the other end of the capacitor C7 and one end of the resistor R15 at the same time, the drive The No. 8 pin of the chip U8 is connected to one end of the capacitor C5 and the negative electrode of the diode D1 at the same time, the No. 7 pin of the driver chip U8 is connected to one end of the resistor R13, and the 5th pin of the driver chip U8 is connected. The No. pin is connected to one end of the resistor R12, and the No. 6 pin of the driver chip U8 is simultaneously connected to the other end of the capacitor C5, the drain of the MOS transistor Q4, the source of the MOS transistor Q5, The anode of the diode D3 is connected to the No. 2 pin of the interface J1, the other end of the resistor R13 is connected to the gate of the MOS transistor Q4, and the other end of the resistor R12 is connected to the gate of the MOS transistor Q5. The gate is connected, the source of the MOS transistor Q4 is connected to the other end of the resistor R15 and the one end of the capacitor C8 at the same time and input voltage, the other end of the capacitor C8 is simultaneously connected to the drain of the MOS transistor Q5 It is connected to the anode of the diode D2, the cathode of the diode D2 is connected to the cathode of the diode D3, and the No. 4 pin of the driver chip U8 is also connected to the other end of the capacitor C7 and the MOS tube Q5 at the same time. The drain is connected, the No. 1 pin of the interface J1 is input voltage, and the No. 3 pin of the interface J1 is grounded.
The anti-static protection system for Internet of Things communication according to claim 4, wherein the LC oscillation module comprises: a transformer TR1, a capacitor C9, a resistor R18, a transistor Q7, a capacitor C11, a resistor R17, a capacitor C10, resistor R16, resistor R17; wherein, one end of the input of the transformer TR1 is connected to one end of the capacitor C9 and one end of the resistor R18 at the same time to input a signal, and the other end of the input of the transformer TR1 is connected to the capacitor at the same time. The other end of C9, the collector of the transistor Q7 and one end of the capacitor C11 are connected and output, and the output end of the transformer TR1 is simultaneously connected to one end of the capacitor C10, one end of the resistor R16 and the resistor R17 One end of the resistor R16 is connected to the ground, the other end of the output of the transformer TR1 is grounded, the base of the transistor Q7 is connected to the other end of the resistor R18, the other end of the capacitor C11 and the resistor R17 at the same time The other end of the transistor Q7 is connected to the other end of the resistor R16 and the other end of the capacitor C10 at the same time.
The anti-static protection system for Internet of Things communication according to claim 4, wherein the optoelectronic isolation module comprises: a diode D4, a diode D5, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a triode Q8, triode Q9, optocoupler U9, triode Q10; wherein, the positive electrode of the diode D4 inputs a signal, and the negative electrode of the diode D4 is simultaneously connected with the collector of the triode Q8, the collector of the triode Q9 and the One end of the resistor R19 is connected, the base of the transistor Q9 is connected to the other end of the resistor R19 and the negative electrode of the diode D5 at the same time, the emitter of the transistor Q9 is connected to the base of the transistor Q8, the The emitter of the transistor Q8 is connected to one end of the resistor R20, the No. 1 pin of the optocoupler U9 is connected to the other end of the resistor R20, and the No. 2 pin of the optocoupler U9 is connected to the diode The positive pole of D5 is connected, the No. 4 pin of the optocoupler U9 is connected to one end of the resistor R22, and the No. 3 pin of the optocoupler U9 is connected to one end of the resistor R21 and the transistor Q10 at the same time. The base is connected, the collector of the transistor Q10 is connected to the other end of the resistor R22 and outputs a signal, and the emitter of the transistor Q10 is connected to the other end of the resistor R21 and grounded.
The anti-static protection system for Internet of Things communication according to claim 4, wherein the model of the driver chip U8 is IR2106S.
A protection method for an anti-static protection system for Internet of Things communication according to any one of claims 2 to 6, wherein the protection method is specifically divided into the following steps:

Step 1. When the intelligent building project is working normally, the collection and detection unit collects the situation inside the building, works through various sensors and sensing elements, and at the same time wirelessly transmits the collected detection signal to the central control unit through the Internet of Things technology;

Step 2. The power management unit supplies power to various loads and circuits inside the building. At the same time, when supplying power, the circuit protection unit detects the temperature and humidity inside the power room to prevent static electricity from being generated;

Step 3, the central control unit receives the signal, converts and decodes the signal at the same time, so as to understand the internal situation of the building, and at the same time transmits the digital signal to various control terminals through the interface unit;

Step 4: The interface unit transmits the numbers to the control terminal, and during the transmission, protects the transmission signal and improves the stability.
A protection method for an anti-static protection system for Internet of Things communication according to claim 8, characterized in that, according to step 2, it can be further obtained:

Step 5. The working voltage is regulated by the input voltage stabilizer U2, and output through the No. 3 pin of the voltage stabilizer U2, and the resistor R2, the resistor R3 and the transistor Q1 form a shunt circuit, so that the working voltage is input to the temperature sensor U1 Work, use the temperature sensor U1 for temperature acquisition, and the collected signal is stably output through the input operational amplifier U3A, while the resistor R3 controls and protects the temperature sensor U1, and the resistor R6 adjusts the gain value of the operational amplifier, and the final temperature signal passes through the operational amplifier U3A. 1 pin for output to the central control unit;

Step 6. The working voltage is input through the No. 2 pin of the humidity sensor U4, the capacitor C4 performs filtering, and the humidity sensor U4 collects the external humidity. Because the humidity sensor U4 has two sensing pins, the signal passes through the No. 1 lead of the humidity sensor U4. The output of the pin is carried out separately through the resistance R7 and the resistance R8, and the signal is buffered and output through the operational amplifier U5A and the operational amplifier U6A. At this time, the resistance R10 and the resistance R9 change the sensitivity of the humidity sensor U4. At the same time, the two humidity signals are calculated by the input. Amplifier U7A performs differential amplification and outputs to the central control unit.
A protection method for an anti-static protection system for Internet of Things communication according to claim 8, characterized in that, according to step 4, it can be further obtained:

Step 7. When the signal is transmitted to the control terminal, the interface oscillates the input voltage signal through the LC, and the voltage flows through the resistor R17 and the resistor R18 to divide the voltage, thereby increasing the appropriate working voltage for the base of the transistor Q7, and the transistor Q7 starts to work at In the amplification state, at the same time, the capacitor C9 loaded by the transistor Q7 and the input end of the transformer TR1 start to work, while the capacitor C11 couples the input, and the resistor R16 feeds back the static operating point of the transistor Q7, thereby reducing signal distortion, and the signal passes through The collector output of the transistor Q7 completes the signal oscillation. At this time, the output coil of the transformer TR1 is used as the signal feedback end;

Step 8. At the same time, the working voltage is input to the circuit through the diode D4. At this time, the transistor Q9 and the transistor Q8 form a voltage regulator circuit. The diode D5 provides the reference reference voltage, the resistor R10 protects, and the voltage signal is protected by the resistor R2. The input photocoupler U9, thus The photocoupler U9 works and outputs through pin 3. At this time, the base of the transistor Q10 is energized, so that the transistor Q10 is turned on, thereby outputting the voltage;

Step 9. At this time, the base input signal of the transistor Q6 in the output module is protected, and the working voltage is input through one end of the capacitor C8. At this time, the driver chip U8 outputs the signal internally and controls the input voltage, and the diode D2 and the diode D3 form an ESD When the protection array is generated by static electricity and affects the rise of the interface voltage and noise, the ESD protection array is triggered to protect the circuit and drive the chip U8.