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CN-121985235-A - Low-power consumption water meter palm circuit based on intelligent water meter

CN121985235ACN 121985235 ACN121985235 ACN 121985235ACN-121985235-A

Abstract

The invention provides a low-power consumption water meter palm circuit based on an intelligent water meter, which relates to the field of water meters and comprises a controller, a first communication circuit, a second communication circuit and a power supply circuit, wherein the first communication circuit is coupled with the controller and is configured to interact with the intelligent water meter to meter the intelligent water meter to obtain meter reading data and transmit the meter reading data to the controller, the second communication circuit is coupled with the controller and is configured to interact with a water meter management terminal to transmit the meter reading data received by the controller from the first communication circuit to an external water meter management terminal, and the power supply circuit is coupled with the controller, the first communication circuit and the second communication circuit and is configured to supply power to the controller, the first communication circuit and the second communication circuit under the control of the controller. The problem that meter reading data cannot be reported when the environmental signal of the intelligent water meter is poor is solved.

Inventors

  • ZHU YALEI
  • WANG BING

Assignees

  • 杭州威星计量技术有限公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (10)

  1. 1. A low-power consumption water meter palm machine circuit based on intelligent water meter, which is characterized by comprising: A controller; The first communication circuit is coupled with the controller and is configured to interact with the intelligent water meter to meter the intelligent water meter to obtain meter reading data and transmit the meter reading data to the controller; A second communication circuit coupled to the controller, the second communication circuit configured to interact with a meter management terminal to transmit meter reading data received by the controller from the first communication circuit to an external meter management terminal; A power supply circuit coupled to the controller, the first communication circuit, and the second communication circuit, the power supply circuit configured to power the controller, the first communication circuit, and the second communication circuit under control of the controller.
  2. 2. The low power consumption water meter palm rest circuit of claim 1, wherein the power supply circuit comprises: A power supply; the power supply voltage end supplies power to the controller, the first communication circuit and the second communication circuit under the control of the controller; an LDO, wherein an input end of the LDO is coupled with the power supply, an output end of the LDO is coupled with the power supply voltage end, and the LDO is configured to convert the power supply voltage of the power supply to obtain the power supply voltage for supplying power to the power supply voltage end; The LDO comprises a power supply, a first switch, a second switch and a third switch, wherein a first pole of the first switch is coupled with the power supply, a second pole of the first switch is coupled with the power supply, and the first switch is configured to be conducted when the power supply voltage of the power supply is lower than a first set voltage, and the power supply directly supplies power to the power supply voltage without passing through the LDO.
  3. 3. The low power consumption water meter palm rest circuit of claim 2, wherein the power supply circuit further comprises: A first voltage sampling circuit coupled to the power supply, the first voltage sampling circuit configured to sample a supply voltage of the power supply; the first voltage sampling circuit is further configured to trigger the first switch to be turned off when detecting that the power supply voltage of the power supply is greater than or equal to the first set voltage, and trigger the first switch to be turned on when detecting that the power supply voltage is smaller than the first set voltage.
  4. 4. The low power consumption water meter palm rest circuit of claim 1, wherein the first voltage sampling circuit comprises: A first resistor having a first end coupled to the power source; A second resistor, a first end of the second resistor being coupled to a second end of the first resistor through a first voltage sampling point, a second end of the second resistor being coupled to a first ground; the comparison triggering unit is coupled with the first voltage sampling point and the control electrode of the first switch; The comparison triggering unit is configured to compare the sampled voltage of the first voltage sampling point with a second set voltage, send a turn-off control signal to a control electrode of the first switch to control the first switch to turn off when the sampled voltage of the first voltage sampling point is larger than the second set voltage, send a turn-on control signal to the control electrode of the first switch to control the first switch to turn on when the sampled voltage of the first voltage sampling point is smaller than or equal to the second set voltage, and the first set voltage is determined based on the second set voltage, the resistance values of the first resistor and the second resistor.
  5. 5. The low power consumption water meter palm rest circuit of claim 2, wherein the first communication circuit comprises: The first LoRaWAN module is coupled with the controller, and the communication frequency band of the first LoRaWAN module is a first frequency band; The second LoRaWAN module is coupled with the controller, and the communication frequency band of the second LoRaWAN module is a second frequency band different from the first frequency band; the controller can control the communication frequency band of the first communication circuit to switch between the first frequency band and the second frequency band.
  6. 6. The low power consumption water meter palm machine circuit of claim 5, wherein the controller comprises a main control MCU and a touch key circuit with a touch key; wherein the controller is configured to: When the first communication circuit and/or the second communication circuit do not work, the main control MCU closes the first communication circuit and the second communication circuit so as to enable the low-power-consumption water meter palm circuit to be in a dormant state; Receiving a start-up touch action signal triggering the first communication circuit and/or the second communication circuit through the touch key, transmitting the start-up touch action signal to the main control MCU through the touch key circuit, and starting the first communication circuit and the second communication circuit through the main control MCU to enable the low-power-consumption water meter palm circuit to be in a start-up state, and And receiving a frequency band selection action signal which is input by a user and selects the communication frequency band of the first communication circuit through the touch key, transmitting the frequency band selection action signal to the main control MCU through the touch key circuit, and controlling the communication frequency band of the first communication circuit to be switched between the first frequency band and the second frequency band through the main control MCU.
  7. 7. The low power consumption water meter palm rest circuit of claim 6, wherein the power supply circuit further comprises a battery, the touch key circuit comprising: a third resistor, a first end of which is coupled with the power supply voltage end, and a second end of which is coupled with an interrupt pin of the main control MCU; a first diode, a positive electrode of which is coupled with a second end of the third resistor and the interrupt pin; the first pole of the second switch is coupled with the cathode of the first diode and the control pole of the third switch, the second pole of the second switch is coupled with the second grounding end, and the control pole of the second switch is coupled with the power supply control pin of the main control MCU; a first pole of the third switch is coupled with a battery power supply end of the battery, and a second pole of the third switch is coupled with the power supply; The touch chip is provided with the touch key and a switch pin, the cathode of the first diode is coupled with the switch pin, and when the touch key receives the starting touch action signal, the touch chip outputs a low level through the switch pin so as to pull down the level of the interrupt pin; When the main control MCU detects that the level of the interrupt pin is pulled down, the second switch is controlled to be conducted through the power supply control pin, so that the third switch is controlled to be conducted, and the battery power supply end of the battery supplies power to the power supply.
  8. 8. The low power consumption water meter palm rest circuit of claim 7, wherein the touch key circuit further comprises a second voltage sampling circuit comprising: A fourth resistor having a first pole coupled to a second pole of the third switch and the power supply; A fifth resistor, wherein a first pole of the fifth resistor is coupled with a second pole of the fourth resistor through a second voltage sampling point, the second voltage sampling point is coupled with a battery voltage sampling pin of the main control MCU, and a second end of the fifth resistor is coupled with a third grounding end; the first end of the first voltage stabilizing capacitor is coupled with the second voltage sampling point, and the second end of the first voltage stabilizing capacitor is coupled with the third grounding end.
  9. 9. The low power water meter palm machine circuit of claim 6 wherein the controller includes a serial port debug circuit, the serial port debug circuit comprising: The first pole of the fourth switch is coupled with the power supply voltage end and the debugging pin of the main control MCU, and the second pole of the fourth switch is coupled with the fourth grounding end; a sixth resistor having a first end coupled to the control electrode of the fourth switch and a second end coupled to the fourth ground; the debugging serial port comprises an activation pin, and the activation pin is coupled with the first end of the sixth resistor and the control electrode of the fourth switch; When the debugging serial port is coupled with an external debugging device, the debugging device pulls the level of the activating pin high to trigger the fourth switch to be conducted, so that the debugging pin of the main control MCU is pulled down to a low level to trigger the main control MCU to be in a serial port debugging state; when the debugging serial port is not coupled with an external debugging device, the fourth switch is turned off, so that the debugging pin of the main control MCU is pulled to a high level, and the main control MCU is triggered to exit the serial port debugging state.
  10. 10. The low power consumption water meter palm set circuit of claim 7, wherein the second communication circuit is a Bluetooth circuit and/or, The low-power-consumption water meter palm circuit also comprises a charging circuit, wherein the charging circuit comprises a double-color indicator lamp circuit and a charging interface which is used for being connected with external charging equipment in a plugging manner, the charging interface is coupled with the input end of the LDO in an on-off manner, the charging interface is coupled with a battery interface of the battery through the double-color indicator lamp circuit, and the battery interface is coupled with the battery power supply end; the double-color indicator lamp circuit comprises a double-color indicator lamp coupled with the charging interface and a lamp control circuit coupled between the double-color indicator lamp and the battery interface; the lamp control circuit and the double-color indicator lamp are configured to control a first color indicator lamp of the double-color indicator lamp to be turned on when the battery is charged, and control a second color indicator lamp of the double-color indicator lamp to be turned on after the battery is fully charged.

Description

Low-power consumption water meter palm circuit based on intelligent water meter Technical Field The disclosure relates to the technical field of water meters, in particular to a low-power-consumption water meter palm machine circuit based on an intelligent water meter. Background With the development of society, intelligent water meters gradually replace original water meters and become mainstream, and in the field of intelligent water meters, intelligent water meter types such as, but not limited to, NB water meters, cat.1 water meters, lorewan water meters, WMBUS water meters and the like are included. At present, when the environmental signal of the intelligent water meter is poor, the intelligent water meter may have the problem that meter reading data cannot be reported. Disclosure of Invention The main purpose of the present disclosure is to provide a low-power consumption meter palm machine circuit based on an intelligent water meter, so as to solve the problem that meter reading data cannot be reported when an environmental signal of the intelligent water meter is relatively poor. In order to achieve the aim, a first aspect of the present disclosure provides a low-power consumption water meter palm machine circuit based on an intelligent water meter, which comprises a controller, a first communication circuit, a second communication circuit and a power supply circuit, wherein the first communication circuit is coupled with the controller and is configured to interact with the intelligent water meter to meter reading data of the intelligent water meter and transmit the meter reading data to the controller, the second communication circuit is coupled with the controller and is configured to interact with a water meter management terminal to transmit the meter reading data received by the controller from the first communication circuit to an external water meter management terminal, and the power supply circuit is coupled with the controller, the first communication circuit and the second communication circuit and is configured to supply power to the controller, the first communication circuit and the second communication circuit under the control of the controller. In some embodiments of the disclosure, the power supply circuit comprises a power supply, a power supply voltage terminal, an LDO and a first switch, wherein the power supply voltage terminal is used for supplying power to the controller, the first communication circuit and the second communication circuit under the control of the controller, the input terminal of the LDO is coupled with the power supply, the output terminal of the LDO is coupled with the power supply voltage terminal, the LDO is configured to convert the power supply voltage of the power supply to obtain the power supply voltage for supplying power to the power supply voltage terminal, a first pole of the first switch is coupled with the power supply, a second pole of the first switch is coupled with the power supply voltage terminal, and the first switch is configured to be turned on when the power supply voltage of the power supply is lower than a first set voltage, and the power supply is directly used for supplying power to the power supply voltage terminal without passing through the LDO. In some embodiments of the present disclosure, the power supply circuit further includes a first voltage sampling circuit coupled to the power supply, the first voltage sampling circuit configured to sample a power supply voltage of the power supply, the first voltage sampling circuit further configured to trigger the first switch to turn off when detecting that the power supply voltage of the power supply is greater than or equal to a first set voltage, and to trigger the first switch to turn on when detecting that the power supply voltage is less than the first set voltage. In some embodiments of the present disclosure, a first voltage sampling circuit includes a first resistor, a second resistor, and a comparison triggering unit, a first end of the first resistor is coupled to a power supply, a first end of the second resistor is coupled to a second end of the first resistor through a first voltage sampling point, a second end of the second resistor is coupled to a first ground, the comparison triggering unit is coupled to the first voltage sampling point and a control electrode of the first switch, wherein the comparison triggering unit is configured to compare a magnitude of a sampling voltage of the first voltage sampling point with a magnitude of a second setting voltage, send an off control signal to the control electrode of the first switch to control the first switch to turn off when the sampling voltage of the first voltage sampling point is greater than the second setting voltage, send an on control signal to the control electrode of the first switch to control the first switch to turn on when the sampling voltage of the first voltage sampling point is less than or equal