A valve pressure regulating method and device

Abstract

This invention belongs to the field of water-saving and water-control technology, specifically relating to a valve pressure regulation method and device, comprising: 1) detecting the valve voltage during valve operation; 2) determining whether the valve voltage is within the valve's operating voltage range; if the valve voltage is not within the operating voltage range, adjusting the on-time of a power switch within a cycle to bring the valve voltage within the operating voltage range; the power switch is positioned between the power source and the valve; the time for each disconnection of the power switch is less than or equal to its own off-time parameter; if the valve voltage is within the valve's operating voltage range, maintaining the on-time of the power switch within the cycle. Thus, this invention solves the problem of unstable voltage in the prior art, leading to low reliability of the solenoid valve.

Description

Technical Field

[0001] This invention belongs to the field of water conservation and water control technology, specifically relating to a valve pressure regulating method and device. Background Technology

[0002] Solenoid valves are used in water conservation and water control applications, but their voltage range is relatively small. In centralized power supply systems, voltage drops exist between the front-end and rear-end devices, resulting in significant voltage drops and stringent power requirements. Voltage fluctuations, exceeding the solenoid valve's voltage, will burn it out; conversely, voltage drops will prevent the valve from opening. Currently, the DC input voltage VIN is not stable and fluctuates significantly. The solenoid valve (F1) has a narrow operating voltage range; exceeding this range will cause damage, while falling below it will prevent proper opening.

[0003] In summary, voltage fluctuations can affect the operation and performance of solenoid valves, leading to a decrease in their reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a valve pressure regulating method and device to solve the problem of low reliability of solenoid valves caused by unstable voltage in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this invention and the corresponding beneficial effects of the technical solution are as follows:

[0006] A valve pressure regulating method according to the present invention includes the following steps:

[0007] 1) Detect the valve voltage during valve operation;

[0008] 2) Determine whether the valve voltage is within the valve operating voltage range. If the valve voltage is not within the valve operating voltage range, adjust the on-time of the power switch within one cycle to bring the valve voltage within the operating voltage range. The power switch is located between the power supply and the valve. The time for the power switch to disconnect each time is less than or equal to its own off-time parameter. If the valve voltage is within the valve operating voltage range, maintain the on-time of the power switch within the cycle.

[0009] The beneficial effects of the above technical solution are as follows: This invention realizes that when the voltage at both ends of the valve fluctuates, the magnitude of the voltage at both ends of the valve can be adjusted by controlling the conduction time of the power switch based on the timely feedback of the detected valve voltage. That is, by using the principle of pulse width modulation to change the duty cycle of the voltage applied to both ends of the valve, the voltage amplitude can be adjusted, thereby keeping the valve voltage within the valve's operating voltage range. By adjusting the voltage, the voltage tends to be stable, thereby improving the reliability of the valve.

[0010] Furthermore, in step 2), if the valve voltage is greater than the valve operating voltage range, the on-time of the power switch within one cycle is reduced; if the valve voltage is less than the valve operating voltage range, the on-time of the power switch within one cycle is increased.

[0011] The present invention discloses a valve pressure regulating device, which includes a power supply, a microcontroller, and a control switch. The power supply connects the microcontroller and the control switch. The microcontroller is used to control the opening and closing of the control switch. The control switch is used to control the on / off state of the circuit where the valve is located. The device is characterized in that it includes a detection module, which is used to detect the voltage across the valve, record it as the valve voltage, and transmit the valve voltage to the microcontroller.

[0012] The microcontroller is used to determine whether the valve voltage is within the valve's operating voltage range. If the valve voltage is not within the operating voltage range, the on-time of the control switch within one cycle is adjusted to bring the valve voltage within the operating voltage range. The time for the control switch to disconnect each time is less than or equal to its own off-time parameter. If the valve voltage is within the valve's operating voltage range, the on-time of the control switch within the cycle is maintained.

[0013] The beneficial effects of the above technical solution are as follows: When the valve is working, the microcontroller of this invention collects the voltage across the valve in real time through the detection module, compares it with the valve's operating voltage, and adjusts the conduction time of the power MOSFET in real time to achieve the purpose of adjusting the voltage across the valve. Through continuous feedback and adjustment, the valve operates within the normal voltage range. This invention enables the device to adjust the conduction time of the control switch based on timely feedback of the valve voltage when the valve's power supply voltage changes or fluctuates, thereby ensuring that the valve operates within the normal operating voltage range. This device guarantees voltage stability and improves the reliability of the valve.

[0014] Furthermore, to improve the reliability of the device, the control switch is a power MOSFET.

[0015] Furthermore, the microcontroller is a digital chip, and the detection module includes an ADC analog-to-digital converter unit.

[0016] Furthermore, the power supply is connected to the microcontroller via a step-down chip.

[0017] Furthermore, to further improve valve stability, the device also includes a diode connected in parallel with the valve, wherein the diode is connected in the opposite direction to the current direction when the valve is operating normally.

[0018] Furthermore, in order to send information to the control switch quickly, the microcontroller controls the control switch through a UART serial port module. Attached Figure Description

[0019] Figure 1 This is a circuit connection diagram of a valve pressure regulating device according to the present invention. Detailed Implementation

[0020] This invention aims to provide a valve pressure regulation method and device. During valve operation, the invention detects the valve voltage and then determines whether the valve voltage is within the valve's operating voltage range. If the valve voltage is not within the operating voltage range, the on-time of a power switch within a cycle is adjusted to bring the valve voltage within the operating voltage range. The power switch is positioned between the power source and the valve. The time the power switch is turned off each time is less than or equal to its own off-time parameter. If the valve voltage is within the valve's operating voltage range, the on-time of the power switch within the cycle is maintained.

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] Device Example:

[0023] An embodiment of the valve pressure regulating device of the present invention, such as... Figure 1 As shown, the device includes a power supply, a step-down chip U1, a microcontroller U2, and a control switch. The power supply powers the control switch and, through the step-down chip, the microcontroller. The microcontroller controls the opening and closing of the control switch; the control switch controls the on / off state of the circuit containing the valve. The microcontroller is connected to the control switch via a UART serial port module. Preferably, the UART serial port module is integrated into the microcontroller, meaning the microcontroller U2 has UART (Universal Asynchronous Serial Transceiver) data transmission function and multiplexing functionality for ordinary digital output ports, allowing independent output of high and low levels. Furthermore, the device includes a diode connected in parallel with the valve, with the diode's connection direction opposite to the current direction during normal valve operation. In this embodiment, the control switch is a power MOSFET, and the valve is an electromagnetic valve. In other embodiments, the control switch can be other controllable switching devices, such as mechanical switches.

[0024] Specifically, the DC voltage input VIN of the power supply powers the microcontroller U2 through the step-down chip U1. The microcontroller U2 sends a digital signal through UART-TX to control the on / off state of the power MOSFET Q1, thereby controlling the opening or closing of the solenoid valve F1. A diode D1 is connected in parallel across the solenoid valve F1. The function of diode D1 is to provide a path for the reverse voltage at the moment the solenoid valve closes, preventing the solenoid valve from burning out. The ADC analog-to-digital converter U3 collects the voltage across the solenoid valves FA and FB, converts it into a digital signal, and transmits it to the microcontroller U2.

[0025] The specific operation of this device is as follows: The UART (Universal Asynchronous Serial Transceiver) port of the microcontroller can continuously transmit binary data sequences. When not transmitting data, the UART-TX output is continuously high. Simultaneously, the microcontroller's UART port can be configured as a general digital output port or continuously output a low level. When the UART-TX output is high, the power MOSFET Q1 is fully turned on. At this time, the voltage applied to the solenoid valve F1 is the DC input voltage VIN. When the UART-TX output is low, the power MOSFET Q1 is turned off, and the valve closes. It should be noted that the serial data transmission baud rate of the UART port should be 115200bps or higher. If the baud rate is too low or there are multiple consecutive low levels, the power MOSFET's turn-off time will be too long, causing the solenoid valve to continuously open and close during operation, preventing normal operation. Specifically, the longest turn-off time of the power MOSFET cannot exceed the MOSFET's own turn-off time parameter. The MOSFET's turn-off time varies depending on the specific model, generally between 10-100ns.

[0026] When solenoid valve F1 needs to be opened, the UART-TX port of microcontroller U2 outputs a high level, turning on power MOSFET Q1. Simultaneously, the ADC (Analog-to-Digital Converter) unit U3 detects the voltage across solenoid valves FA and FB and transmits this data to the microcontroller. The microcontroller compares the solenoid valve voltage with its operating voltage. When the voltage applied across solenoid valve F1 is higher than its operating voltage, the microcontroller adjusts the serial data output from the UART-TX port of U2 in real time, reducing the on-time of the power MOSFET. Conversely, it adjusts the UART-TX output data, increasing the on-time of the power MOSFET, thereby automatically adjusting the voltage applied to solenoid valve F1.

[0027] The following example illustrates the control process of this invention:

[0028] If the DC input voltage VIN is 15V, the operating voltage of solenoid valve F1 is 12-13V. When the microcontroller needs to open the valve, it first switches the UART-TX port to serial communication mode. TX outputs a high level in the idle state, and solenoid valve F1 opens. The voltage applied across solenoid valve F1 is 15V. The ADC analog-to-digital converter module collects the voltages of solenoid valves FA and FB and transmits them to the microcontroller. The microcontroller calculates that the voltage across solenoid valve F1 should be reduced. At this time, it continuously outputs a binary sequence (01111111111111111) on the UART-TX port to reduce the conduction time of the power MOSFET. If the monitored voltage of solenoid valve F1 is still higher than 13V, it continues to reduce the number of 1s in the serial binary sequence until the solenoid valve reaches the 12-13V range. Conversely, if the voltage fluctuates and the DC input voltage VIN becomes 10V (the power supply voltage cannot be lower than the valve's operating voltage), the microcontroller should increase the number of 1s in the binary sequence sent via the serial port, raising the voltage across solenoid valve F1 until it reaches between 12-13V, thus achieving dynamic balance. Specifically, the microcontroller controls the number of 1s in the binary sequence by modifying the output data of the UART-TX serial port; 1 corresponds to turning on the MOSFET, and 0 corresponds to turning off the MOSFET. By modifying the output data, the on-time of the MOSFET is adjusted, thereby adjusting the voltage. The control rule is that the time corresponding to consecutive 0s cannot exceed the MOSFET's own off-time parameter.

[0029] In summary, this invention enables the solenoid valve to automatically maintain its normal operating voltage range by adjusting the binary sequence of UART data transmitted based on timely feedback of the valve voltage and fluctuations in the valve power supply voltage, thereby ensuring equipment stability and improving equipment reliability.

[0030] Method Implementation Examples:

[0031] An embodiment of a valve pressure regulation method of the present invention involves detecting the valve voltage during valve operation; then determining whether the valve voltage is within the valve's operating voltage range. If the valve voltage is not within the operating voltage range, the on-time of a power switch within one cycle is adjusted to bring the valve voltage within the operating voltage range. The power switch is positioned between the power source and the valve; the time the power switch is turned off each time is less than or equal to its own off-time parameter. If the valve voltage is within the valve's operating voltage range, the on-time of the power switch within the cycle is maintained. This method and the specific working process of the device in the apparatus embodiment are consistent with the pressure regulation method, and have been specifically described in the apparatus embodiment, so they will not be repeated here.

Claims

1. A method of valve pressure regulation, the method comprising: For the centralized power supply scene of electromagnetic valve, the centralized power supply scene includes a line for supplying power to the electromagnetic valve, the electromagnetic valve includes a frontmost electromagnetic valve and a rearmost electromagnetic valve, comprising the following steps: 1) detecting the valve voltage during the valve operation; 2) determining whether the valve voltage is within the valve operating voltage range, if the valve voltage is not within the valve operating voltage range, adjusting the on-time of the power switch in a cycle to make the valve voltage within the operating voltage range; the power switch is arranged between the power supply and the valve; the time of each disconnection of the power switch is less than or equal to the off-time parameter of the power switch; if the valve voltage is within the valve operating voltage range, the on-time of the power switch in the cycle is maintained; wherein the power supply voltage is greater than the valve operating voltage.

2. The method of claim 1, wherein: In step 2), if the valve voltage is greater than the valve operating voltage range, the on-time of the power switch in a cycle is reduced; if the valve voltage is less than the valve operating voltage range, the on-time of the power switch in a cycle is increased.

3. A valve pressure regulating device, the device comprising a power supply, a microcontroller and a control switch, the power supply being electrically connected to the microcontroller and the control switch, the microcontroller being used to control the opening and closing of the control switch; the control switch being used to control the opening and closing of a circuit in which the valve is located; characterized in that: For the centralized power supply scene of electromagnetic valve, the centralized power supply scene includes a line for supplying power to the electromagnetic valve, the electromagnetic valve includes a frontmost electromagnetic valve and a rearmost electromagnetic valve, the device includes a detection module, the detection module is used to detect the voltage at both ends of the valve, denoted as the valve voltage, and transmit the valve voltage to the microcontroller; wherein the power supply voltage is greater than the valve operating voltage; The microcontroller is used to determine whether the valve voltage is within the valve operating voltage range, if the valve voltage is not within the valve operating voltage range, adjusting the on-time of the control switch in a cycle to make the valve voltage within the operating voltage range; the time of each disconnection of the control switch is less than or equal to the off-time parameter of the control switch; if the valve voltage is within the valve operating voltage range, the on-time of the control switch in the cycle is maintained.

4. The valve pressure regulating device of claim 3, wherein: The control switch is a power MOS tube.

5. The valve pressure regulating device of claim 3, wherein: The microcontroller is a digital chip, and the detection module includes an ADC analog-to-digital conversion unit.

6. The valve pressure regulating device of claim 5, wherein: The power supply is connected to the microcontroller through a step-down chip.

7. The valve pressure regulating device of claim 3, wherein: The device further includes a diode connected in parallel with the valve, and the diode is connected in a direction opposite to the current direction during normal operation of the valve.

8. Valve pressure regulating device according to any one of claims 3 to 7, characterized in that The microcontroller controls the control switch through a UART serial port module.

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