CN218570124U - Control circuit of water meter valve motor and water meter - Google Patents
Control circuit of water meter valve motor and water meter Download PDFInfo
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- CN218570124U CN218570124U CN202222774816.2U CN202222774816U CN218570124U CN 218570124 U CN218570124 U CN 218570124U CN 202222774816 U CN202222774816 U CN 202222774816U CN 218570124 U CN218570124 U CN 218570124U
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Abstract
The utility model discloses a control circuit and water gauge of water gauge valve motor, including MCU, power supply circuit, communication circuit, valve motor drive circuit and water gauge motor, communication circuit acquires outside valve accuse signal, communication circuit with the MCU electricity is connected, MCU's control signal output part is connected valve motor drive circuit's control signal input, valve motor drive circuit's abnormal signal output part is connected MCU's abnormal signal input part, valve motor drive circuit's drive output part is connected the input of water gauge motor, power supply circuit's power output part is connected respectively MCU's power input part communication circuit's power input part with valve motor drive circuit's power input part. This practicality exports when motor end electric current is greater than the overcurrent threshold value, can automatic excision circuit, can effectively avoid the circuit that motor stalling caused to burn out or the motor damages.
Description
Technical Field
The utility model relates to a water gauge technical field, concretely relates to water gauge valve motor's control circuit and water gauge.
Background
The valve control water meter integrates a valve control device on the basis of the original water meter, the IC card water meter, the radio frequency card water meter and the remote water meter are additionally arranged at present, and the water meter can be effectively managed through valve control so as to collect water fee in time. The valve control management of the additionally-installed valve is based on the water supply service requirement, and for the meter billing shortage or other special conditions in the daily operation process, the valve control operation of the water meter is carried out through near-end or remote communication, and the valve control management belongs to the real-time response function of a meter end to a valve control operation instruction.
If the valve-controlled water meter is blocked by a valve motor in the operation process of the switch valve, large current can be brought to a valve-controlled water meter circuit, and the hardware structure can be extruded. The former will generate larger power consumption influence, reduce battery life, and even damage hardware circuit; the latter can lead to structural deformations of the motor, with a serious possibility of damage to the structural connection.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a technical scheme does:
the utility model provides a control circuit of water gauge valve motor, includes MCU, power supply circuit, communication circuit, valve motor drive circuit and water gauge motor, communication circuit acquires outside valve accuse signal, communication circuit with the MCU electricity is connected, MCU's control signal output part is connected valve motor drive circuit's control signal input part, valve motor drive circuit's abnormal signal output part is connected MCU's abnormal signal input part, valve motor drive circuit's drive output part is connected water gauge motor's input, power supply circuit's power output part is connected respectively MCU's power input part communication circuit's power input part with valve motor drive circuit's power input part.
The utility model is further arranged that the input voltage of the power circuit is the voltage VBAT provided by the USB, the power circuit comprises a VDD voltage supply circuit and a VREF voltage supply circuit,
the VDD voltage supply circuit comprises a diode D31, a PMOS tube PM32, a resistor R31, a resistor R32 and a capacitor E31, wherein the anode of the diode D31 and the drain of the PMOS tube PM31 are respectively connected with the voltage VBAT, the cathode of the diode D31 and the source of the PMOS tube PM31 are respectively connected with the source of the PMOS tube PM32, the grid of the PMOS tube PM31 is respectively connected with the output end of the MCU and one end of the resistor R31, the source of the PMOS tube PM31 is respectively connected with the other end of the resistor R31 and one end of the capacitor E31, the other end of the capacitor E31 is grounded, the grid of the PMOS tube PM32 is connected with one end of the resistor R32, the other end of the resistor R32 is grounded, and the drain of the PMOS tube PM32 outputs VDD,
the VREF voltage power supply circuit comprises a voltage stabilizing chip U33, a capacitor C33 and a capacitor C34, wherein the input end of the voltage stabilizing chip U33 is connected with the VDD voltage and one end of the capacitor C33, the output end of the voltage stabilizing chip U33 is connected with one end of the capacitor C34, the other end of the capacitor C33, the grounding end of the voltage stabilizing chip U33 and the other end of the capacitor C34 are all grounded, and the output end of the voltage stabilizing chip U33 outputs VREF voltage.
The utility model is further arranged that the valve motor driving circuit comprises a motor driving chip U21, a capacitor C22, a capacitor C23, a resistor R21 and a resistor R22, the VM pin of the motor driving chip U21 is respectively connected with one end of the capacitor C21 and the VDD voltage, the other end of the capacitor C21 is grounded, the VCP pin of the motor driving chip U21 is connected with one end of the capacitor C22, one end of the capacitor C22 is grounded, the AIN1 pin, the AIN2 pin, the BIN1 pin and the BIN2 pin of the motor driving chip U21 are respectively connected with the control signal output end of the MCU, the AOUT1 pin, the AOUT2 pin, the BOUT1 pin and the BOUT2 pin of the motor driving chip U21 are connected with the input end of the water meter motor, the ALSEN pin and the BISEN pin of the motor driving chip U21 are respectively connected with one end of the resistor R21, the other end of the resistor R21 is grounded, the nSLEEP pin of the motor driving chip U21 is connected with the control signal output end of the MCU, the output end of the NFAULT pin of the motor driving chip U21 is connected with one end of the resistor R22, the other end of the resistor R22 is respectively connected with the VREF voltage and the abnormal signal input end of the MCU, the GND pin of the motor driving chip U21 is grounded, the VINT pin of the motor driving chip U21 is connected with one end of the capacitor C23, and the other end of the capacitor C23 is grounded.
The utility model is further configured that when the nSLEEP pin of the motor driving chip U21 is at a low level, the motor driving chip U21 enters a sleep mode; when the nSLEEP pin of the motor driving chip U21 is at a high level, the motor driving chip U21 enters a working mode.
The utility model discloses further set up to still including the display circuit, the display circuit's input with MCU's output electricity is connected.
The utility model discloses further set up as communication circuit is one of infrared communication circuit, radio frequency communication circuit and GPRS wireless communication circuit.
The utility model discloses further set up to still include SWD debugging circuit, SWD debugging circuit with the MCU electricity is connected.
The utility model discloses further set up to still include serial ports FLASH circuit, serial ports FLASH circuit with the MCU electricity is connected.
The utility model discloses further set up to still include reset circuit, reset circuit with the MCU electricity is connected.
A water meter comprises the control circuit of the water meter valve motor.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
the working principle of the control circuit of the water meter valve motor in the technical scheme is as follows: when the communication circuit receives the valve control signal, the communication circuit sends the valve control signal to the MCU, and the MCU starts the valve motor driving circuit to enable the valve motor driving circuit to enter a working state; when the valve control signal is a valve opening signal, the MCU outputs a first PWM control signal to the valve motor driving circuit, and the valve motor driving circuit outputs driving voltage to enable the water meter motor to rotate forwards to open the valve; when the valve control signal is a valve closing signal, the MCU outputs a second PWM control signal to the valve motor driving circuit, and the valve motor driving circuit outputs driving voltage to enable the water meter motor to reversely close the valve; the running state of the valve is detected by setting the in-place switch, and when the valve is detected to be in place, or the valve is detected to be in place, the MCU controls the motor driving circuit of the valve to stop working and enter a sleep mode; in the above-mentioned motor opening action or closing action, when the driving current outputted by the valve motor driving circuit exceeds the threshold value, the valve motor driving circuit can cut off the driving circuit of the water meter motor, and at the same time the valve motor driving circuit can send the driving output abnormal event to MCU. The control circuit of the water meter valve motor can automatically cut off the circuit once the current output to the motor end is greater than the overload current threshold value, and can effectively avoid the circuit burnout or the motor damage caused by the motor stalling; meanwhile, the abnormal events of the water meter motor can be fed back to the MCU at the first time, the MCU presents the abnormal events of the water meter motor, and the working power consumption of the whole machine is low.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a VDD voltage supply circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a VREF voltage supply circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a valve motor driving circuit according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of the MCU circuit according to the embodiment of the present invention.
Fig. 6 is a schematic diagram of a circuit according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a communication circuit according to an embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; either mechanically or electrically, or internally communicating two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meanings of the above terms according to specific situations.
Example 1
Combine attached figure 1 to figure 7, the utility model discloses technical scheme is a control circuit of water gauge valve motor, including MCU1, power supply circuit 2, communication circuit 3, valve motor drive circuit 4 and water gauge motor 5, communication circuit 3 acquires outside valve accuse signal, communication circuit 3 with MCU1 electricity is connected, MCU 1's control signal output part is connected valve motor drive circuit 4's control signal input part, valve motor drive circuit 4's abnormal signal output part is connected MCU 1's abnormal signal input part, valve motor drive circuit 4's drive output part is connected water gauge motor 5's input, power supply circuit 2's power output part is connected respectively MCU 1's power input part communication circuit 3's power input part with valve motor drive circuit 4's power input part.
In this embodiment, the model of the MCU is FM33LG048.
In this embodiment, the input voltage of the power supply circuit 2 is a voltage VBAT provided by the USB, and the power supply circuit includes a VDD voltage supply circuit and a VREF voltage supply circuit:
as shown in fig. 2, the VDD voltage supply circuit includes a diode D31, a PMOS transistor PM32, a resistor R31, a resistor R32, and a capacitor E31, wherein an anode of the diode D31 and a drain of the PMOS transistor PM31 are respectively connected to the voltage VBAT, a cathode of the diode D31 and a source of the PMOS transistor PM31 are respectively connected to a source of the PMOS transistor PM32, a gate of the PMOS transistor PM31 is respectively connected to an output terminal of the MCU and one end of the resistor R31, a source of the PMOS transistor PM31 is respectively connected to the other end of the resistor R31 and one end of the capacitor E31, the other end of the capacitor E31 is grounded, a gate of the PMOS transistor PM32 is connected to one end of the resistor R32, the other end of the resistor R32 is grounded, and a drain of the PMOS transistor PM32 outputs VDD voltage,
as shown in fig. 3, the VREF voltage supply circuit includes a voltage regulation chip U33, a capacitor C33 and a capacitor C34, an input terminal of the voltage regulation chip U33 is connected to the VDD voltage and one end of the capacitor C33, an output terminal of the voltage regulation chip U33 is connected to one end of the capacitor C34, the other end of the capacitor C33, a ground terminal of the voltage regulation chip U33 and the other end of the capacitor C34 are all grounded, and an output terminal of the voltage regulation chip U33 outputs the VREF voltage.
In this embodiment, as shown in fig. 4, the valve motor driving circuit includes a motor driving chip U21, a capacitor C22, a capacitor C23, a resistor R21, and a resistor R22, the model of the motor driving chip U21 is DRV8833, a VM pin of the motor driving chip U21 is connected to one end of the capacitor C21 and the VDD voltage, the other end of the capacitor C21 is grounded, a VCP pin of the motor driving chip U21 is connected to one end of the capacitor C22, one end of the capacitor C22 is grounded, an AIN1 pin, an AIN2 pin, a BIN1 pin, and a BIN2 pin of the motor driving chip U21 are connected to a control signal output end of the MCU, an AOUT1 pin, an AOUT2 pin, a BIN1 pin, and a BIN2 pin of the motor driving chip U21 are connected to an input end of the water meter motor, an ALSEN pin and a BIN2 pin of the motor driving chip U21 are connected to one end of the resistor R21, the other end of the resistor R21 is grounded, the other end of the motor driving chip U21 is connected to the ground, the other end of the ground of the capacitor C21 is connected to the ground, and the output end of the resistor R chip of the capacitor C21 is connected to the ground, the control signal output end of the capacitor C23 is connected to the ground, and the fet driving chip is connected to the ground, the motor driving chip is connected to the output end of the capacitor C23, the fet driving chip is connected to the capacitor C21, and the ground, the fet driving chip is connected to the ground, the output end of the capacitor C23 is connected to the motor driving chip is connected to the output end of the MCU is connected to the ground, and the ground.
In this embodiment, when the nSLEEP pin of the motor driver chip U21 is at a low level, the motor driver chip U21 enters a sleep mode, and the motor driver chip U21 is reset at the same time; when the nSLEEP pin of the motor driving chip U21 is at a high level, the motor driving chip U21 enters a working mode.
In this embodiment, the resistance value of the resistor R21 is set according to the overcurrent of the water meter motor, and the overcurrent threshold value is changed by changing the resistance value of the resistor R21.
IN this embodiment, the AIN1 pin and the BIN1 pin of the motor driving chip U21 are connected to the VAL _ OPEN _ IN signal of the MCU, i.e., the valve opening signal; and an AIN2 pin and a BIN2 pin of the motor driving chip U21 are connected with a VAL _ CLOSE _ IN signal of the MCU, namely a valve closing signal.
In this embodiment, the output ends of the AOUT1 pin and the BOUT1 pin of the motor driving chip U21 are the water meter motor valve opening voltage; and the output ends of the AOUT2 pin and the BOUT2 pin of the motor driving chip U21 are the water meter motor off-valve voltage.
In this embodiment, the nFAULL signal output by the NFAULT pin of the motor driving chip U21 is sent to the MCU, i.e., the driving outputs a signal corresponding to an abnormal event.
In this embodiment, as shown in fig. 6, the display device further includes a display circuit 6, and an input end of the display circuit 6 is electrically connected to an output end of the MCU 1.
In this embodiment, the communication circuit 3 is one of an infrared communication circuit, a radio frequency communication circuit, and a GPRS wireless communication circuit. As shown in fig. 7, an infrared communication circuit is used on the water meter to acquire the valve control signal.
In the embodiment, the MCU control circuit further comprises a reset circuit 7, and the reset circuit 7 is electrically connected with the MCU 1.
In this embodiment, the device further includes an SWD debug circuit 8, and the SWD debug circuit 8 is electrically connected to the MCU 1.
In this embodiment, the FLASH memory further includes a serial port FLASH circuit 9, and the serial port FLASH circuit 9 is electrically connected to the MCU 1.
The working principle of the control circuit of the water meter valve motor of the embodiment is as follows: when the communication circuit receives the valve control signal, the communication circuit sends the valve control signal to the MCU, and the MCU starts the valve motor driving circuit to enable the valve motor driving circuit to enter a working state; when the valve control signal is a valve opening signal, the MCU outputs a first PWM control signal to the valve motor driving circuit, and the valve motor driving circuit outputs driving voltage to enable the water meter motor to rotate forwards to open the valve; when the valve control signal is a valve closing signal, the MCU outputs a second PWM control signal to the valve motor driving circuit, and the valve motor driving circuit outputs driving voltage to enable the water meter motor to reversely close the valve; the running state of the valve is detected by setting the in-place switch, and when the valve is detected to be in place, or the valve is detected to be in place, the MCU controls the motor driving circuit of the valve to stop working and enter a sleep mode; in the above-mentioned motor opening action or closing action, when the driving current outputted by the valve motor driving circuit exceeds the threshold value, the valve motor driving circuit can cut off the driving circuit of the water meter motor, and at the same time the valve motor driving circuit can send the driving output abnormal event to MCU.
Example 2
The utility model provides a water meter, including embodiment 1 water meter valve motor's control circuit.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a control circuit of water gauge valve motor, its characterized in that, includes MCU, power supply circuit, communication circuit, valve motor drive circuit and water gauge motor, communication circuit acquires outside valve accuse signal, communication circuit with the MCU electricity is connected, MCU's control signal output part is connected valve motor drive circuit's control signal input part, valve motor drive circuit's abnormal signal output part is connected MCU's abnormal signal input part, valve motor drive circuit's drive output part connects the input of water gauge motor, power supply circuit's power output part connects respectively MCU's power input part communication circuit's power input part with valve motor drive circuit's power input part.
2. The control circuit of a water meter valve motor in accordance with claim 1, wherein the input voltage of said power supply circuit is a USB supplied voltage VBAT, said power supply circuit comprising a VDD voltage supply circuit and a VREF voltage supply circuit,
the VDD voltage supply circuit comprises a diode D31, a PMOS tube PM32, a resistor R31, a resistor R32 and a capacitor E31, wherein the anode of the diode D31 and the drain of the PMOS tube PM31 are respectively connected with the voltage VBAT, the cathode of the diode D31 and the source of the PMOS tube PM31 are respectively connected with the source of the PMOS tube PM32, the grid of the PMOS tube PM31 is respectively connected with the output end of the MCU and one end of the resistor R31, the source of the PMOS tube PM31 is respectively connected with the other end of the resistor R31 and one end of the capacitor E31, the other end of the capacitor E31 is grounded, the grid of the PMOS tube PM32 is connected with one end of the resistor R32, the other end of the resistor R32 is grounded, and the drain of the PMOS tube PM32 outputs VDD,
the VREF voltage power supply circuit comprises a voltage stabilizing chip U33, a capacitor C33 and a capacitor C34, wherein the input end of the voltage stabilizing chip U33 is connected with the VDD voltage and one end of the capacitor C33, the output end of the voltage stabilizing chip U33 is connected with one end of the capacitor C34, the other end of the capacitor C33, the grounding end of the voltage stabilizing chip U33 and the other end of the capacitor C34 are all grounded, and the output end of the voltage stabilizing chip U33 outputs VREF voltage.
3. The control circuit of a water meter valve motor according to claim 2, wherein the valve motor driving circuit includes a motor driving chip U21, a capacitor C22, a capacitor C23, a resistor R21 and a resistor R22, a VM pin of the motor driving chip U21 is connected to one end of the capacitor C21 and the VDD voltage, respectively, the other end of the capacitor C21 is grounded, a VCP pin of the motor driving chip U21 is connected to one end of the capacitor C22, one end of the capacitor C22 is grounded, an AIN1 pin, an AIN2 pin, a BIN1 pin and a BIN2 pin of the motor driving chip U21 are connected to a control signal output end of the MCU, an AOUT1 pin, an AOUT2 pin, a BOUT1 pin and a BOUT2 pin of the motor driving chip U21 are connected to an input end of the water meter motor, an aln pin and a BIN2 pin of the motor driving chip U21 are connected to one end of the resistor R21, the other end of the resistor R21 is grounded, an nsen pin of the motor driving chip U21 is connected to a ground, an output end of the capacitor C21 pin, and an output end of the capacitor C23 is connected to an output end of the capacitor C23, and an output end of the resistor R23 of the capacitor C21 is connected to ground.
4. The control circuit of a water meter valve motor according to claim 3, wherein when the nSLEEP pin of the motor driver chip U21 is low, the motor driver chip U21 enters a sleep mode; when the nSLEEP pin of the motor driving chip U21 is at a high level, the motor driving chip U21 enters a working mode.
5. A control circuit of a water meter valve motor as claimed in any one of claims 1 to 4, further comprising a display circuit, wherein an input terminal of the display circuit is electrically connected to an output terminal of the MCU.
6. A water meter valve motor control circuit as claimed in any one of claims 1 to 4, wherein the communication circuit is one of an infrared communication circuit, a radio frequency communication circuit and a GPRS wireless communication circuit.
7. The control circuit of a water meter valve motor according to any one of claims 1 to 4, further comprising an SWD debug circuit, said SWD debug circuit being electrically connected to said MCU.
8. The control circuit of the water meter valve motor according to any one of claims 1 to 4, further comprising a serial FLASH circuit electrically connected to the MCU.
9. The control circuit of the water meter valve motor according to any one of claims 1 to 4, further comprising a reset circuit, wherein the reset circuit is electrically connected to the MCU.
10. A water meter comprising the control circuit for the valve motor of the water meter of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222774816.2U CN218570124U (en) | 2022-10-20 | 2022-10-20 | Control circuit of water meter valve motor and water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222774816.2U CN218570124U (en) | 2022-10-20 | 2022-10-20 | Control circuit of water meter valve motor and water meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218570124U true CN218570124U (en) | 2023-03-03 |
Family
ID=85317668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222774816.2U Active CN218570124U (en) | 2022-10-20 | 2022-10-20 | Control circuit of water meter valve motor and water meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218570124U (en) |
-
2022
- 2022-10-20 CN CN202222774816.2U patent/CN218570124U/en active Active
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