Electromagnetic valve drive board circuit

Abstract

The utility model discloses a solenoid valve drive board circuit which comprises a microcontroller, a temperature data conversion circuit, a voltage conversion circuit, an RS485 communication circuit, a storage operation configuration information circuit and a power supply, the temperature data conversion circuit is connected with the microcontroller, the power supply is connected to the voltage conversion circuit, the voltage conversion circuit is connected with the microcontroller, and the microcontroller is connected with the RS485 communication circuit. And the microcontroller is connected with the RS485 communication circuit and the operation configuration information storage circuit. A high-speed switch electromagnetic valve driving circuit is improved, so that a new function of changing the driving of the electromagnetic valve through temperature is realized.

Description

Technical Field

[0001] The utility model relates to a driving board circuit, in particular to a solenoid valve driving board circuit. Background Art

[0002] The solenoid valve is a key component for realizing fluid automation control and is widely used in fields such as industrial manufacturing, automatic control, and household appliances. It can be controlled by an electric signal and plays an important role in remote monitoring and control systems.

[0003] The known and publicly disclosed Chinese utility model patent (CN 206268569U) for a high-speed switch solenoid valve driving circuit, through re-designing it, realizes a new function of driving the solenoid valve by temperature change. The cited patent only focuses on the driving of the solenoid valve, and how to perform temperature processing and control is a problem that needs to be solved by us. Summary of the Invention

[0004] To solve the problem of driving the solenoid valve by temperature change, the utility model needs to provide a DWD solenoid valve driving board circuit.

[0005] The utility model provides the following technical solutions:

[0006] A solenoid valve driving board circuit includes a microcontroller, a temperature data conversion circuit, a voltage conversion circuit, an RS485 communication circuit, a circuit for storing operation configuration information, and a power supply. The temperature data conversion circuit is connected to the microcontroller. The power supply is connected to the voltage conversion circuit, and the voltage conversion circuit is connected to the microcontroller. The microcontroller is connected to the RS485 communication circuit, the circuit for storing operation configuration information, and the solenoid valve driving circuit.

[0007] Further, the model of the microcontroller is PIC16F887-I / PT.

[0008] Further, the temperature data conversion circuit includes an operational amplifier, an interface of a temperature sensor, and a voltage stabilizer. The interface of the temperature sensor and the voltage stabilizer are connected to the operational amplifier, and the operational amplifier transmits the received temperature data to the microcontroller.

[0009] Further, the voltage conversion circuit includes a buck switch voltage regulator and a linear voltage regulator. The 24V power supply is connected to the buck switch voltage regulator to step down to 10V DC voltage, and the 10V DC voltage is sent to the linear voltage regulator to step down to 5V DC voltage.

[0010] Further, the RS485 communication circuit collects data through an RS485 chip.

[0011] Further, the circuit for storing operation configuration information is connected to the microcontroller through SPI by using a storage chip.

[0012] Further, the microcontroller is connected to the DAC chip using the SPI interface and outputs a reference voltage for driving the solenoid valve.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: By improving the driving circuit of the high-speed switching solenoid valve, a new function of driving the solenoid valve by temperature change is realized.

[0014] (1) A precision operational amplifier is used in the temperature data conversion circuit, which can perform high-speed data acquisition, signal processing, etc., has a wide operating temperature range, and can work normally under various power supply conditions.

[0015] (2) A buck switching regulator and a linear regulator are used in the voltage conversion circuit, and their advantages lie in high efficiency, step-down conversion with a wide input range, etc.

[0016] (3) An RS485 chip is used in the RS485 communication circuit, and its advantages lie in enabling high-speed, long-distance, and reliable communication, etc.

[0017] (4) An electrically erasable programmable read-only memory is used in the circuit for storing operating configuration information. Even in the case of power-off or power-on again, the data can be retained for a long time, ensuring the reliability and persistence of the data. Description of the Drawings

[0018] Figure 1 It is the temperature data conversion circuit diagram of the present utility model.

[0019] Figure 2 It is the voltage conversion circuit diagram of the present utility model.

[0020] Figure 3 It is the voltage conversion circuit diagram of the present utility model.

[0021] Figure 4 It is the voltage conversion circuit diagram of the present utility model.

[0022] Figure 5 It is the RS485 communication circuit diagram of the present utility model.

[0023] Figure 6 It is the circuit diagram for storing operating and configuration information of the present utility model.

[0024] Figure 7 It is the circuit diagram related to the microcontroller of the present utility model.

[0025] Figure 8 It is the schematic diagram of the present utility model.

[0026] Figure 9 It is the solenoid valve drive circuit diagram in the cited patent.

[0027] 1. Temperature data conversion circuit; 2. Voltage conversion circuit; 3. RS485 communication circuit; 4. Circuit for storing operation configuration information; 5. Microcontroller; 6. Power supply; 7. Solenoid valve drive circuit. Embodiment

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 8 , a solenoid valve drive board circuit of the present invention includes a microcontroller 5, a temperature data conversion circuit 1, a voltage conversion circuit 2, an RS485 communication circuit 3, a circuit 4 for storing operation configuration information, and a power supply 6. The temperature data conversion circuit 1 is connected to the microcontroller 5, the power supply 6 is connected to the voltage conversion circuit 2, the voltage conversion circuit 2 is connected to the microcontroller 5, and the microcontroller 5 is connected to the RS485 communication circuit 3, the circuit 4 for storing operation configuration information, and the solenoid valve drive circuit 7.

[0030] The microcontroller 5 obtains temperature data, compares the set configuration information, and controls the drive of the solenoid valve. Figure 7 As shown, the model of the microcontroller 5 is PIC16F887-I / PT.

[0031] The temperature data conversion circuit 1 includes an operational amplifier U10, an interface CON1 of a temperature sensor, and a voltage regulator Z4. The interface CON1 of the temperature sensor and the voltage regulator Z4 are connected to the operational amplifier U10, and the operational amplifier U10 transmits the received temperature data to the microcontroller.

[0032] Figure 1 In, CON1 is the interface of the temperature sensor. After receiving the temperature data, it transmits the data to the microcontroller through the precision operational amplifier (OP191GS) in the figure.

[0033] The voltage conversion circuit 2 is because the working voltages required by each module are different. The voltage conversion circuit includes a buck switch regulator and a linear regulator. A 24V power supply is connected to the buck switch regulator U12 to step down to 10V DC voltage, and the 10V DC voltage is sent to the linear regulator U11 to step down to 5V DC voltage.

[0034] Figure 2 The 24V power supply connected in is for powering the solenoid valve drive, and Figure 3Step down the 24V medium voltage to 10V DC voltage through a step-down switching voltage regulator (LT1676IS8). Figure 4 Then, output a stable and reliable 5V DC voltage through a linear voltage regulator (UA78M05IDCYR) from the 10V voltage. This is mainly because both the 10V and 5V voltages are used by respective chips in the circuit.

[0035] RS485 communication circuit 3 Figure 5 Collect data through an RS485 chip (MAX13443EASA) in it, mainly to achieve the communication function.

[0036] Circuit 4 for storing operation configuration information Figure 6 In it, use a storage chip U1 (25LC020A-E / SN) to connect to a microcontroller U7 (PIC16F887-I / PT) through SPI to store data, save configuration information, etc. 25LC020A-E / SN is an electrically erasable programmable read-only memory, a storage chip whose data is not lost after power-off.

[0037] Figure 9 It is the solenoid valve drive circuit diagram cited from the patent (CN 206268569U). In the solenoid valve drive circuit, U14 (TS5A3159ADBVR chip) is a DAC chip.

[0038] Figure 7 The microcontroller in it uses an SPI interface to connect to the DAC chip ( Figure 9 U14 in it), output a reference voltage for driving the solenoid valve; the SPI interface is connected to the storage chip to store operation and configuration information; the microcontroller leads out multiple ADC interfaces to detect the power supply voltage, temperature sensor, solenoid valve working voltage and current, etc.; the microcontroller leads out IO ports to cooperate with the solenoid valve drive circuit.

[0039] Use a precision operational amplifier (OP191GS) in the temperature data conversion circuit. It can perform high-speed data acquisition, signal processing, etc., has a wide operating temperature range, and can work normally under various power supply conditions, making the circuit design more flexible.

[0040] Use a step-down switching voltage regulator (LT1676IS8) and a linear voltage regulator (UA78M05IDCYR) in the voltage conversion circuit. Its advantages lie in high efficiency, step-down conversion with a wide input range, etc.

[0041] Use an RS485 chip (MAX13443EASA) in the RS485 communication circuit. Its advantages lie in enabling high-speed, long-distance, and reliable communication, etc.

[0042] A charged erasable programmable read-only memory (25LC020A-E / SN) is used in the circuit for storing operation and configuration information. The storage of the internal data of the charged erasable programmable read-only memory does not depend on the power supply. Even in the case of power failure or power-on again, the data can be retained for a long time, ensuring the reliability and persistence of the data; its erase / write cycle times exceed 1 million times, ensuring that data can be updated frequently within a relatively long time; it has a wide operating temperature range and can maintain stable performance under various harsh environmental conditions.

[0043] The utility model can be used in agricultural production. Within different temperature ranges, the solenoid valve group can be used to control the start and stop of the irrigation system. Moreover, precise irrigation control can be achieved according to regions and crop requirements, improving agricultural production efficiency and water resource utilization rate, etc.

[0044] Although the embodiments of the utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic valve drive board circuit, characterized in that: It includes a microcontroller (5), a temperature data conversion circuit (1), a voltage conversion circuit (2), an RS485 communication circuit (3), a circuit for storing operation configuration information (4), and a power supply (6). The temperature data conversion circuit (1) is connected to the microcontroller (5). The power supply (6) is connected to the voltage conversion circuit (2). The voltage conversion circuit (2) is connected to the microcontroller (5). The microcontroller (5) is connected to the RS485 communication circuit (3), the circuit for storing operation configuration information (4), and a solenoid valve drive circuit (7).

2. The solenoid valve drive board circuit according to claim 1, characterized in that: The model of the microcontroller (5) is PIC16F887-I / PT.

3. The solenoid valve drive board circuit according to claim 1, wherein: The temperature data conversion circuit (1) includes an operational amplifier, an interface of a temperature sensor, and a voltage regulator. The interface of the temperature sensor and the voltage regulator are connected to the operational amplifier. The operational amplifier transmits the received temperature data to the microcontroller.

4. The solenoid valve drive board circuit according to claim 1, wherein: The voltage conversion circuit (2) includes a buck switching regulator and a linear regulator. A 24V power supply is connected to the buck switching regulator to step down the voltage to 10V DC voltage, and the 10V DC voltage is sent to the linear regulator to step down the voltage to 5V DC voltage.

5. The solenoid valve drive board circuit according to claim 1, characterized in that: The RS485 communication circuit (3) collects data through an RS485 chip.

6. The solenoid valve drive board circuit according to claim 1, wherein: The circuit for storing operation configuration information (4) is connected to the microcontroller through an SPI interface using a storage chip.

7. The solenoid valve drive board circuit according to claim 1, wherein: The microcontroller is connected to a DAC chip using an SPI interface to output a reference voltage for driving the solenoid valve.

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