[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduce a national invention-authorized patent - a remote copy meter. The patent was applied for by Ningbo Weisi Electric Technology Co., Ltd. and was authorized to be announced on August 22, 2017.
The utility model relates to the technical field of smart meters, in particular to a remote copying water meter.
Background of the invention
Remote copying water meter, also called smart IC card water meter, is a new type of water meter that uses modern microelectronic technology, modern sensor technology, and smart IC card technology to measure water consumption and transmit water data and settlement transactions. In addition to recording and electronically displaying water consumption, it can also automatically control the water consumption according to the agreement, and automatically calculate the water fee for the water price of the stepped water price, and at the same time, it can perform the function of water data storage.
Remote copy meter includes microprocessor, LCD display, solenoid valve module, flow monitoring module and so on. However, as it is known, these modules all need to consume power while working. The microprocessor and liquid crystal display will generate continuous power consumption during normal operation, and the solenoid valve will generate instantaneous power consumption when it is opened and closed. This forces the user to replace the battery frequently. Once the user does not replace the battery in time, the solenoid valve cannot be closed due to insufficient energy, resulting in loss of water metering.
Therefore, it is necessary to provide a remote water meter that can detect the power, and promptly remind the user to replace the battery when the power is low. At the same time, when the user fails to replace the water meter in time, the solenoid valve can be closed in time as needed. .
Summary of the Invention
The main purpose of the utility model is to provide a long-distance copying water meter, which can realize the power detection and the power alarm function, and also can close the electromagnetic valve in time when the user fails to replace the battery in time so as to avoid the water metering loss.
To achieve the above objectives, the technical solution adopted by the utility model is: a remote copy meter, including a microprocessor module, a flow monitoring module, an IC card reading and writing function module, a liquid crystal display module, a solenoid valve module, and a power supply module. The power supply module is connected with the microprocessor module and the electromagnetic valve module, and the flow monitoring module, the IC card read-write function module and the liquid crystal display module are all connected with the microprocessor, characterized in that: the first branch of the power supply module is a microprocessor The module provides power, the second branch supplies power to the solenoid valve module, the second branch includes a capacitor C1, C2, diode D1, the cathode of the capacitor C1, the anode of the capacitor C2, and the anode of the diode D1 are commonly connected to the second The branch, the cathode of the capacitor C1, the cathode of the capacitor C2, the cathode of the diode D1 is connected to the power input end of the solenoid valve module, and the cathode of the capacitor C1 is grounded.
FIG. 4 is a partial circuit diagram of a remote copying water meter according to a preferred embodiment of the present invention.
Further, the remote copying water meter further includes an alarm module. The power supply module further has a third branch. The alarm module includes a resistor R1 located between the output of the first branch and the power supply of the microprocessor module. The buzzer B1 and the optocoupler relay G1 located at the third branch transmit the voltage drop information of the resistor R1 to the microprocessor control module, and one end of the photoreceptor of the optocoupler relay G1 and the bee The horn B1 is connected and the other end is grounded. One end of the light-emitting diode of the optocoupler relay G1 is connected to the microprocessor module, and the other end is grounded.
The remote copying water meter further includes a tamper-proof meter module. The tamper-proof meter module includes a switch S1. One end of the switch S1 is connected to an interrupt input end of the microprocessor module, and the other end is grounded.
The utility model has the following beneficial effects: when the power supply module works normally, the capacitors C1 and C2 are charged. When the power supply module has insufficient power, the voltage drop across the resistor R1 in the alarm device is analyzed by the microprocessor module, and then the optocoupler is controlled. Turning on, the buzzer gets an electric alarm to remind the user to replace the battery in time. At the same time, the microprocessor module issues a solenoid valve closing command, which causes the solenoid valve to be closed in time. Once the user forgets to replace the battery, the battery power failure occurs. Capacitors C1 and C2 are used to release points, that is, the diode D1 provides power to the solenoid valve so that it can be normally closed.
When the water meter is in normal use, the switch S1 in the tamper-proof table module is disconnected, and the interrupt input terminal of the microprocessor module is in a high state. Once the water meter is maliciously opened by the user and improper water operation is performed, the switch S1 is closed, making micro The interrupt input terminal of the processor module changes from high level to low level, and the microprocessor interrupts the signal accordingly, and immediately controls the closing of the solenoid valve to prevent the occurrence of user misbehavior.
For more information, please download the full specification of the patent.
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