Voltage-multiplying driving circuit of bistable pulse valve and control method of voltage-multiplying driving circuit

Abstract

The invention discloses a voltage-multiplying driving circuit of a bistable pulse valve and a control method of the voltage-multiplying driving circuit. The voltage-multiplying driving circuit comprises a control module, a battery input module, a capacitance voltage-multiplying module and a pulse driving module, the capacitor voltage-multiplying module comprises a capacitor C1, a capacitor C2, a diode D1, a switching tube V1 and a switching tube V2, the switching tube V1 controls whether the capacitor C2 is charged or not, and the switching tube V2 controls whether the capacitor C1 and the capacitor C2 are connected in series or not; the battery input module is connected with the input end of the capacitor voltage-multiplying module; the pulse driving module is connected with the output end of the capacitance voltage-multiplying module; and the control module controls the on-off of the switching tube V1 and the switching tube V2. According to the invention, the bistable pulse valve can be driven to be switched under a relatively low power supply voltage, and meanwhile, the circuit has the advantage of low standby power consumption.

Description

Technical Field

[0001] This invention relates to the field of bistable pulse valves, and in particular to a voltage multiplier drive circuit for a bistable pulse valve and its control method. Background Technology

[0002] A bistable pulse valve is an intelligent fluid control element that utilizes pulse and permanent magnet technology. It is widely used in scenarios such as automatic flushing of smart toilets, water control in sensor-operated sanitary ware, automatic water supply from solar panels, automated garden irrigation, and fluid regulation in food processing production lines. It can precisely control the flow of water, gas, and some liquid media. The bistable pulse valve changes its open or closed state by switching the polarity of the pulse to drive the valve core, and it maintains its current position when power is cut off, requiring no continuous power supply.

[0003] Existing battery-powered bistable pulse valves operate at a voltage of 6V or higher. This is because, for the same driving power, a lower operating voltage requires a higher operating current, necessitating a lower internal resistance in the drive power supply circuit. However, the process of battery power consumption involves an increase in the battery's internal resistance (the lower the battery's charge, the higher its internal resistance). Therefore, a lower operating voltage for the bistable pulse valve is less favorable for the battery power supply circuit; hence, the operating voltage of the bistable pulse valve needs to be set relatively high. For a 6V bistable pulse valve, the minimum driving voltage is 4.5V; below 4.5V, the bistable pulse valve cannot be driven to switch. Currently, the drive circuit of the bistable pulse valve is mainly powered by two lithium batteries or four dry cell batteries connected in series, but these batteries occupy a significant amount of cost and space. Reducing the amount of plastic in the battery would help lower costs and product size. However, if a single lithium battery (3.7V) or two dry cell batteries (3V) are used for power supply, the bistable pulse valve cannot be directly driven to switch. Therefore, a voltage doubler circuit is needed to boost the voltage. However, common voltage doubler circuits have high standby power consumption (standby power consumption refers to the state of maintaining the output voltage without a load) and relatively high internal resistance. This results in high standby power consumption for the entire bistable pulse valve drive circuit, affecting battery life and making it inconvenient for users.

[0004] In view of the above problems, it is necessary to study a bistable pulse valve voltage multiplier drive circuit and its control method, which can drive the bistable pulse valve to switch at a lower supply voltage, and has the advantage of low standby power consumption. Summary of the Invention

[0005] The purpose of this invention is to provide a bistable pulse valve voltage multiplier drive circuit and its control method, which can drive the bistable pulse valve to switch at a lower supply voltage, and has the advantage of low standby power consumption.

[0006] To achieve the above objectives, the solution of the present invention is: A voltage multiplier drive circuit for a bistable pulse valve includes a control module, a battery input module, a capacitor voltage multiplier module, and a pulse drive module. The capacitor voltage multiplier module includes capacitor C1, capacitor C2, diode D1, switching transistors V1 and V2. Switches V1 and V2 are complementary in type. The positive terminal of capacitor C1, the second terminal of switching transistor V2, and the positive terminal of diode D1 are connected to the input terminal of the capacitor voltage multiplier module. The negative terminal of capacitor C1 and the first terminal of switching transistor V1 are grounded. The positive terminal of capacitor C2 and the negative terminal of diode D1 are connected to the output terminal of the capacitor voltage multiplier module. The negative terminal of capacitor C2 is connected to the first terminal of switching transistor V2. The second terminal of switching transistor V1, the control terminal of switching transistor V1, and the control terminal of switching transistor V2 are respectively connected to the first and second control terminals of the capacitor multiplier circuit; the battery input module has a battery connection port J1, the positive terminal of battery connection port J1 is connected to the input terminal of the capacitor multiplier module, and the negative terminal of battery connection port J1 is grounded; the pulse drive module is connected to the output terminal of the capacitor multiplier module and is powered by the capacitor multiplier module; the control module is connected to the first and second control terminals of the capacitor multiplier circuit and controls the switching on and off of switching transistors V1 and V2; the control module is connected to the pulse drive module and controls the operation of the pulse drive module.

[0007] The voltage multiplier drive circuit of the bistable pulse valve also includes an instruction input module, which is connected to the control module.

[0008] The voltage multiplier drive circuit of the bistable pulse valve also includes an alarm module, which is connected to the control module.

[0009] The power supply terminal of the control module is connected to the positive terminal of the battery connection port J1, and the ground terminal of the control module is grounded.

[0010] The control module is connected to the first and second control terminals of the capacitor multiplier circuit through resistors R1 and R2, respectively.

[0011] The pulse drive module includes a bridge drive chip U2. The VDD pin of the bridge drive chip U2 is connected to the output terminal of the capacitor voltage multiplier circuit. The INA and INB pins of the bridge drive chip U2 are respectively connected to the control module. The AGND and BGND pins of the bridge drive chip U2 are grounded. The control module includes a microcontroller chip U1.

[0012] The control method for the voltage multiplier drive circuit of the bistable pulse valve described above includes the following sequential steps: Step S1: Connect the power supply battery to the battery connection port J1, connect the pulse drive module to the bistable pulse valve, and perform power-on initialization of the control module; Step S2: The control module detects whether there is a switching command input. When the control module detects a switching command input, it proceeds to step S3. Step S3: The control module controls the switch V1 to be turned on and the switch V2 to be turned off, so that the capacitor C2 is charged; after the capacitor C2 is fully charged, the control module first controls the switch V1 to be turned off and then controls the switch V2 to be turned on, so that the capacitors C2 and C1 are connected in series and the voltages of the capacitors C2 and C1 are superimposed. Step S4: The control module first controls the pulse drive module to output a pulse signal to drive the bistable pulse valve to switch within a set drive time. Then the control module controls the switching transistor V2 to turn off so that the capacitor multiplier module enters the standby state, and repeats step S2.

[0013] The voltage multiplier drive circuit of the bistable pulse valve further includes a capacitor voltage detection module. The input terminal of the capacitor voltage detection module is connected to the positive terminal of capacitor C2, and the output terminal of the capacitor voltage detection module is connected to the control module. In step S3, when capacitor C2 is charging, the control module detects the voltage of capacitor C2 through the capacitor voltage detection module. When the control module detects that the voltage of capacitor C2 has reached the set voltage for capacitor charging, it determines that capacitor C2 is fully charged.

[0014] In step S3, when capacitor C2 is charging, the control module uses the capacitor voltage detection module to detect the voltage of capacitor C2 at set detection intervals. If the voltage of capacitor C2 reaches the set charging voltage within the set number of detections, it is determined that capacitor C2 is fully charged. If the voltage of capacitor C2 does not reach the set charging voltage within the set number of detections, it is determined that the battery connected to battery connection port J1 is faulty. At this time, the control module controls the switch V1 to turn off and issues an alarm, ending the process.

[0015] The voltage multiplier drive circuit of the bistable pulse valve further includes a battery voltage detection module. The input terminal of the battery voltage detection module is connected to the positive terminal of the battery connection port J1, and the output terminal of the battery voltage detection module is connected to the control module. In step S2, when the control module detects the switching command input, the control module detects the supply voltage of the power supply battery connected to the battery connection port J1 through the battery voltage detection module, and the control module sets the capacitor charging setting to meet the voltage according to the supply voltage of the power supply battery and the theoretical line voltage drop.

[0016] The voltage multiplier drive circuit of the bistable pulse valve further includes a battery voltage detection module. The input terminal of the battery voltage detection module is connected to the positive terminal of the battery connection port J1, and the output terminal of the battery voltage detection module is connected to the control module. In step S2, when the control module does not detect the switching command input, the control module detects the supply voltage of the power supply battery connected to the battery connection port J1 through the battery voltage detection module. If the supply voltage of the power supply battery is lower than the set battery threshold voltage, the control module controls the switch V1 to turn off and issues an alarm, ending the process.

[0017] By adopting the above scheme, the capacitor voltage multiplier module of the present invention can achieve a voltage multiplication effect. In scenarios where the supply voltage of the power supply battery is relatively low, the present invention uses the capacitor voltage multiplier module to multiply the voltage (that is, to ensure that capacitors C2 and C1 are fully charged and connected in series so that their voltages are superimposed), ensuring that the voltage supplied to the pulse drive module can meet the driving voltage requirements of the bistable pulse valve, and ensuring that the bistable pulse valve can be driven to switch normally. In addition, when the capacitor voltage multiplier module of the present invention is in standby mode, both control switches V1 and V2 are turned off and capacitor C2 is disconnected. At this time, only diode D1 and capacitor C1 are connected in the loop of the entire circuit. Since capacitor C1 is fully charged with almost no energy consumption, and diode D1 has very little energy consumption, the standby power consumption of the capacitor voltage multiplier module of the present invention is low, thereby making the standby power consumption of the entire circuit low, which helps to extend the battery life. Attached Figure Description

[0018] Figure 1 This is a circuit diagram of a voltage multiplier drive circuit for a bistable pulse valve according to the present invention.

[0019] Figure 2 This is a flowchart of a control method for a voltage multiplier drive circuit of a bistable pulse valve according to the present invention. Detailed Implementation

[0020] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0021] like Figure 1As shown, this invention discloses a voltage multiplier drive circuit for a bistable pulse valve, comprising a control module, a battery input module, a capacitor voltage multiplier module, and a pulse drive module. The capacitor voltage multiplier module includes capacitors C1 and C2, a diode D1, a switching transistor V1, and a switching transistor V2. Switches V1 and V2 are complementary in type. The positive terminal of capacitor C1, the second terminal of switching transistor V2, and the positive terminal of diode D1 are connected to the input terminal of the capacitor voltage multiplier module. The negative terminal of capacitor C1 and the first terminal of switching transistor V1 are grounded. The positive terminal of capacitor C2 and the negative terminal of diode D1 are connected to the output terminal of the capacitor voltage multiplier module. The negative terminal of capacitor C2 is connected to the first terminal of switching transistor V2 and the second terminal of switching transistor V1. The control module of switching transistor V1... The control terminals of the gate and the switching transistor V2 are respectively connected to the first and second control terminals of the capacitor multiplier circuit; the battery input module has a battery connection port J1, which is used to connect a power supply battery. The positive terminal of the battery connection port J1 is connected to the input terminal of the capacitor multiplier module, and the negative terminal of the battery connection port J1 is grounded; the pulse drive module is connected to the output terminal of the capacitor multiplier module and is powered by the capacitor multiplier module. The pulse drive module is used to connect to the bistable pulse valve and drive the bistable pulse valve to switch; the control module is respectively connected to the first and second control terminals of the capacitor multiplier circuit and controls the on and off of the switching transistors V1 and V2; the control module is connected to the pulse drive module and controls the operation of the pulse drive module.

[0022] Cooperate Figure 2 As shown, the control method of the voltage multiplier drive circuit of a bistable pulse valve according to the present invention includes the following sequential steps: Step S1: Connect the power supply battery to the battery connection port J1, connect the pulse drive module to the bistable pulse valve, and perform power-on initialization of the control module; Step S2: The control module detects whether there is a switching command input. When the control module detects a switching command input, it proceeds to step S3. Step S3: The control module controls the switch V1 to be turned on and the switch V2 to be turned off, so that the capacitor C2 is charged; after the capacitor C2 is fully charged, the control module first controls the switch V1 to be turned off and then controls the switch V2 to be turned on, so that the capacitors C2 and C1 are connected in series and the voltages of the capacitors C2 and C1 are superimposed. Step S4: The control module first controls the pulse drive module to output a pulse signal to drive the bistable pulse valve to switch within a set drive time. Then the control module controls the switching transistor V2 to turn off so that the capacitor multiplier module enters the standby state, and repeats step S2.

[0023] As described above, the capacitor voltage multiplier module of the present invention can achieve a voltage multiplication effect. Thus, in scenarios where the power supply voltage of the battery is low, the present invention uses the capacitor voltage multiplier module to multiply the voltage (ensuring that capacitors C2 and C1 are fully charged and connected in series, causing their voltages to be superimposed), ensuring that the voltage supplied to the pulse drive module meets the driving voltage requirements of the bistable pulse valve, guaranteeing that the bistable pulse valve can be driven to switch normally. Furthermore, in standby mode, both switching transistors V1 and V2 are cut off, and capacitor C2 is disconnected. At this time, only diode D1 and capacitor C1 are connected in the circuit loop. Since capacitor C1 is fully charged with virtually no energy consumption, and diode D1 also consumes very little energy, the standby power consumption of the capacitor voltage multiplier module of the present invention is low, resulting in low standby power consumption for the entire circuit and helping to extend the battery life.

[0024] In embodiments of the present invention, the control module may include a microcontroller chip U1, which may be an HT66F002 and has analog-to-digital conversion capabilities. The power supply terminal of the control module can be connected to the positive terminal of the battery connection port J1, and the ground terminal of the control module is grounded, allowing the control module to be directly powered by the battery connected to the battery connection port J1. Capacitor C1 stabilizes the power supply voltage of the control module. The control module can be connected to the first and second control terminals of the capacitor multiplier circuit via resistors R1 and R2, respectively. Resistors R1 and R2 limit current and protect switching transistors V1 and V2.

[0025] In an embodiment of the present invention, the switching transistor V1 is an NPN transistor, and the switching transistor V2 is a corresponding PNP transistor. It should be noted that the switching transistor V1 can also be an NMOS transistor, and the switching transistor V2 can be a corresponding PMOS transistor.

[0026] In an embodiment of the present invention, the pulse driving module includes a bridge driving chip U2, which may be of type TC118S. The VDD pin of the bridge driving chip U2 is connected to the output terminal of the capacitor voltage multiplier circuit. The INA and INB pins of the bridge driving chip U2 are respectively connected to the control module. The AGND and BGND pins of the bridge driving chip U2 are grounded. The OUTA and OUTB pins of the bridge driving chip U2 are used to connect to the coil of the bistable pulse valve.

[0027] In an embodiment of the present invention, the voltage multiplier drive circuit of a bistable pulse valve may further include an instruction input module, which is connected to the control module and is used to input switching instructions to the control module. The instruction input module may be an input instruction switch KEY. It should be noted that, in addition to using a mechanical input instruction switch KEY, the instruction input module may also be a touch switch, a proximity switch, or a touch screen.

[0028] In an embodiment of the present invention, the voltage multiplier drive circuit of a bistable pulse valve may further include a capacitor voltage detection module. The input terminal of the capacitor voltage detection module is connected to the positive terminal of capacitor C2, and the output terminal of the capacitor voltage detection module is connected to the control module. The capacitor voltage detection module includes resistors R4 and R5. The first end of resistor R5 is connected to the input terminal of the voltage detection module, and the second end of resistor R5 and the first end of resistor R4 are connected to the output terminal of the voltage detection module. The second end of resistor R4 is grounded. In step S3, when capacitor C2 is charging, the control module detects the voltage of capacitor C2 through the capacitor voltage detection module. When the control module detects that the voltage of capacitor C2 has reached the set voltage for capacitor charging, it determines that capacitor C2 is fully charged. Specifically, when capacitor C2 is charging, the control module can detect the voltage of capacitor C2 at set intervals using the capacitor voltage detection module. If the voltage of capacitor C2 reaches the set charging voltage within the set number of detections, it is determined that capacitor C2 is fully charged. If the voltage of capacitor C2 does not reach the set charging voltage within the set number of detections, it is determined that the battery connected to battery connection port J1 is faulty. At this time, the control module controls the switch V1 to turn off and issues an alarm, ending the process. This setting can trigger an alarm when the power supply battery has a low supply voltage, reminding the user to replace the power supply battery, while avoiding device failure caused by the entire circuit driving the bistable pulse valve to switch when the supply voltage is too low. The set detection time and the set charging voltage can be set according to the supply voltage and discharge rate.

[0029] In an embodiment of the present invention, the voltage multiplier drive circuit of the bistable pulse valve may further include a battery voltage detection module. The input terminal of the battery voltage detection module is connected to the positive terminal of the battery connection port J1, and the output terminal of the battery voltage detection module is connected to the control module. The battery voltage detection module may include a resistor R3. In step S2, when the control module does not detect a switching command input, the control module detects the supply voltage of the power supply battery connected to the battery connection port J1 through the battery voltage detection module. If the supply voltage of the power supply battery is lower than the set battery threshold voltage (the set battery threshold voltage is the minimum supply voltage at which the power supply battery cannot make the entire circuit work normally), the control module controls the switch V1 to turn off and issues an alarm, ending the process. This setting can issue an alarm when the power supply battery has a low supply voltage, reminding the user to replace the power supply battery, while avoiding device failure caused by the entire circuit driving the bistable pulse valve to switch when the supply voltage is too low. Furthermore, in step S2, when the control module detects the switching command input, the control module detects the supply voltage of the power supply battery connected to the battery connection port J1 through the battery voltage detection module, and the control module sets the capacitor charging set satisfaction voltage according to the supply voltage of the power supply battery and the theoretical line voltage drop (the capacitor charging set satisfaction voltage can be the supply voltage of the power supply battery minus the theoretical line voltage drop, which is set by the manufacturer). This allows for flexible setting of the capacitor charging set satisfaction voltage, so that the voltage of capacitor C2 is as high as possible after charging is completed.

[0030] In an embodiment of the present invention, the voltage multiplier drive circuit of a bistable pulse valve may further include an alarm module. The alarm module is connected to the control module, and the control module alarms through the alarm module. The alarm module may include a series resistor R6 and an indicator LED1. When the control module alarms, it inputs a switch signal to the alarm module to control the indicator LED1 to flash, thereby triggering the alarm.

[0031] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A voltage multiplier drive circuit for a bistable pulse valve, characterized in that: It includes a control module, a battery input module, a capacitor multiplier module, and a pulse drive module; The capacitor multiplier module includes capacitor C1, capacitor C2, diode D1, switching transistor V1, and switching transistor V2. Switching transistors V1 and V2 are complementary in type. The positive terminal of capacitor C1, the second terminal of switching transistor V2, and the positive terminal of diode D1 are connected to the input terminal of the capacitor multiplier module. The negative terminal of capacitor C1 and the first terminal of switching transistor V1 are grounded. The positive terminal of capacitor C2 and the negative terminal of diode D1 are connected to the output terminal of the capacitor multiplier module. The negative terminal of capacitor C2 is connected to the first terminal of switching transistor V2 and the second terminal of switching transistor V1. The control terminals of switching transistor V1 and V2 are respectively connected to the first and second control terminals of the capacitor multiplier circuit. The battery input module has a battery connection port J1. The positive terminal of the battery connection port J1 is connected to the input terminal of the capacitor multiplier module, and the negative terminal of the battery connection port J1 is grounded. The pulse drive module is connected to the output of the capacitor multiplier module and is powered by the capacitor multiplier module. The control module is connected to the first and second control terminals of the capacitor voltage multiplier circuit and controls the switching on and off of switching transistors V1 and V2; the control module is also connected to the pulse drive module and controls its operation.

2. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: It also includes a capacitor voltage detection module, whose input terminal is connected to the positive terminal of capacitor C2, and whose output terminal is connected to the control module.

3. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: It also includes an instruction input module, which is connected to the control module.

4. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: It also includes a battery voltage detection module, the input of which is connected to the positive terminal of the battery connection port J1, and the output of which is connected to the control module.

5. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: It also includes an alarm module, which is connected to the control module.

6. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: The power supply terminal of the control module is connected to the positive terminal of the battery connection port J1, and the ground terminal of the control module is grounded.

7. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: The control module is connected to the first and second control terminals of the capacitor multiplier circuit through resistors R1 and R2, respectively.

8. The voltage multiplier drive circuit for a bistable pulse valve as described in claim 1, characterized in that: The pulse drive module includes a bridge drive chip U2. The VDD pin of the bridge drive chip U2 is connected to the output terminal of the capacitor voltage multiplier circuit. The INA and INB pins of the bridge drive chip U2 are respectively connected to the control module. The AGND and BGND pins of the bridge drive chip U2 are grounded. The control module includes a microcontroller chip U1.

9. The control method for the voltage multiplier drive circuit of a bistable pulse valve as described in claim 1, characterized in that: The steps are as follows: Step S1: Connect the power supply battery to the battery connection port J1, connect the pulse drive module to the bistable pulse valve, and perform power-on initialization of the control module; Step S2: The control module detects whether there is a switching command input. When the control module detects a switching command input, it proceeds to step S3. Step S3: The control module controls the switch V1 to be turned on and the switch V2 to be turned off, so that the capacitor C2 is charged; after the capacitor C2 is fully charged, the control module first controls the switch V1 to be turned off and then controls the switch V2 to be turned on, so that the capacitors C2 and C1 are connected in series and the voltages of the capacitors C2 and C1 are superimposed. Step S4: The control module first controls the pulse drive module to output a pulse signal to drive the bistable pulse valve to switch within a set drive time. Then the control module controls the switching transistor V2 to turn off so that the capacitor multiplier module enters the standby state, and repeats step S2.

10. The control method as described in claim 9, characterized in that: The voltage multiplier drive circuit of the bistable pulse valve further includes a capacitor voltage detection module. The input terminal of the capacitor voltage detection module is connected to the positive terminal of capacitor C2, and the output terminal of the capacitor voltage detection module is connected to the control module. In step S3, when capacitor C2 is charging, the control module detects the voltage of capacitor C2 through the capacitor voltage detection module; when the control module detects that the voltage of capacitor C2 has reached the set voltage for capacitor charging, it determines that capacitor C2 is fully charged.

11. The control method as described in claim 10, characterized in that: In step S3, when capacitor C2 is charging, the control module uses the capacitor voltage detection module to detect the voltage of capacitor C2 at set detection intervals. If the voltage of capacitor C2 reaches the set charging voltage within the set number of detections, it is determined that capacitor C2 is fully charged. If the voltage of capacitor C2 does not reach the set charging voltage within the set number of detections, it is determined that the battery connected to battery connection port J1 is faulty. At this time, the control module controls the switch V1 to turn off and issues an alarm, ending the process.

12. The control method as described in claim 10, characterized in that: The voltage multiplier drive circuit of the bistable pulse valve also includes a battery voltage detection module. The input terminal of the battery voltage detection module is connected to the positive terminal of the battery connection port J1, and the output terminal of the battery voltage detection module is connected to the control module. In step S2, when the control module detects the switching command input, the control module detects the power supply voltage of the power supply battery connected to the battery connection port J1 through the battery voltage detection module, and the control module sets the capacitor charging setting to meet the voltage according to the power supply voltage of the power supply battery and the theoretical line voltage drop.

13. The control method as described in claim 9, characterized in that: The voltage multiplier drive circuit of the bistable pulse valve also includes a battery voltage detection module. The input terminal of the battery voltage detection module is connected to the positive terminal of the battery connection port J1, and the output terminal of the battery voltage detection module is connected to the control module. In step S2, when the control module does not detect a switching command input, the control module detects the power supply voltage of the power supply battery connected to the battery connection port J1 through the battery voltage detection module. If the power supply voltage of the power supply battery is lower than the set battery threshold voltage, the control module controls the switch V1 to turn off and issues an alarm, ending the process.

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