Electric leakage monitoring system of water meter
By designing a water meter leakage monitoring system including sampling resistors, differential amplifier circuits, comparison circuits and main controllers, the problem of water meter leakage detection in humid environments is solved, efficient leakage monitoring and alarm notification are achieved, and power consumption and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421670796.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-15
AI Technical Summary
In humid environments, the internal circuit components of the water meter are easily damp, resulting in the working current of the smart water meter increasing, shortening the battery life, and it is difficult to find leakage water meters in a large number of water meters, resulting in increased maintenance time and economic expenditure.
Design a leakage monitoring system for water meter, including sampling resistors, differential amplifier circuits, comparison circuits and main controllers. The current signal is obtained through the sampling resistor, and the differential amplification circuit amplifies and then sends a voltage signal to the comparison circuit. The comparison circuit is connected to the main controller. The main controller is in a dormant state and is only awakened when a leakage is detected and an alarm signal is emitted.
The leakage monitoring of smart water meter is realized, which reduces the power consumption during the monitoring process, and quickly finds the problem water meter through self-diagnosis of hardware circuits, saves after-sales maintenance time and economic expenditure, and sends alarms to users or water supply stations through wireless transmission modules.
Smart Images
Figure CN222994639U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic water meters, in particular to a leakage monitoring system and a monitoring method for a water meter. Background Art
[0002] Under the goal of vigorously developing smart manufacturing in 2025, water meters are increasingly used in our industry that involves people's livelihood. Many water meters need to work in humid environments or even in water. At this time, it is inevitable that the internal circuit components of the water meter will be damp, which will cause the working current of the smart water meter to increase, thereby shortening the battery life. When a water meter has a leakage phenomenon, it is necessary to repair the leaking water meter. How to find the leaking water meter among a large number of water meters is a major technical problem in the current smart water meter industry. If the one-by-one detection method is used, it will take a lot of time and economic expenditure. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a leakage monitoring system for a water meter, which can realize leakage monitoring of an intelligent water meter and reduce power consumption during the monitoring process.
[0004] The specific technical scheme is as follows: A leakage monitoring system for a water meter includes a sampling resistor, a differential amplifier circuit, a comparison circuit and a main controller;
[0005] The sampling resistor is installed between the power supply and the load to obtain a current signal;
[0006] The differential amplifier circuit is connected to the sampling resistor and is used to send a voltage signal to the comparison circuit after amplification;
[0007] The comparison circuit is connected to the differential amplifier circuit and is used to compare the voltage signal with a preset value. If the voltage signal exceeds the preset threshold, a level signal is sent to the main controller.
[0008] The main controller is connected to the comparison circuit and is in a dormant state. After receiving a level signal sent by the comparison circuit, the main controller is awakened and sends out an alarm signal.
[0009] Through the above technical solution, when leakage occurs or the current in the sampling resistor is too large, the amplified voltage signal exceeds the preset threshold of the comparison circuit, that is, a level signal is sent to the main controller to wake up the main controller, and the main controller sends an alarm signal to monitor whether there is an abnormal situation in the water meter. Under normal conditions, the main controller is in a dormant state to save battery power consumption.
[0010] Preferably, a setting circuit is provided between the main controller and the comparison circuit, the setting circuit is connected to the main controller and the comparison circuit respectively, and the setting circuit is used to adjust a preset threshold of the comparison circuit.
[0011] Through the above technical solution, the preset threshold of the comparison circuit can be set by setting the circuit, so that the smart water meter can set different thresholds to adapt to leakage monitoring in different environments.
[0012] Preferably, the main controller is connected to a wireless transmission module, and the wireless transmission module is used to send an alarm signal to a user or a water supply station.
[0013] Through the above technical solution, the alarm signal can be sent to the user or the water supply station through the wireless transmission module.
[0014] Preferably, an RC delay circuit is connected between the differential amplifier circuit and the comparison circuit.
[0015] Through the above technical solution, the voltage signal state of the input comparison circuit can be made more stable through the RC delay circuit.
[0016] The beneficial effects of the utility model are:
[0017] 1. Through hardware circuit self-diagnosis, abnormal water meters can send out alarm signals, making it easy for maintenance personnel to quickly find the problematic water meter, which can greatly save after-sales maintenance time and economic expenses.
[0018] 2. Under normal circumstances, the main controller is in sleep mode, which reduces the power consumption of the water meter leakage monitoring system.
[0019] 3. The main controller is connected to the wireless transmitter module, which can send alarms to users and water supply stations when the water meter operates abnormally. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:
[0021] Figure 1 This is a structural schematic diagram of Example 1;
[0022] 1. Sampling resistor, 2. Differential amplifier circuit, 3. Comparison circuit, 4. Main controller, 5. Setting circuit, 6. RC delay circuit, 7. Wireless transmission module. DETAILED DESCRIPTION
[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0025] Example 1
[0026] like Figure 1 As shown, a leakage monitoring system for a water meter includes a sampling resistor 1, a differential amplifier circuit 2, a comparison circuit 3 and a main controller 4. The sampling resistor 1 is installed between the power supply and the load to form a differential signal. The differential amplifier circuit 2 is connected to the sampling resistor and is used to send a voltage signal to the comparison circuit after amplification. The comparison circuit 3 is connected to the differential amplifier circuit and is used to compare the voltage signal with a preset value. If the voltage signal exceeds the preset threshold, a level signal is sent to the main controller 4. The main controller 4 is connected to the comparison circuit 3. The main controller 4 is in a dormant state and can be awakened by the level signal sent by the comparison circuit 3. The main controller 4 sends an alarm signal after being awakened by the level signal.
[0027] An RC delay circuit 6 is provided between the differential amplifier circuit 2 and the comparison circuit 3 .
[0028] A setting circuit 5 is provided between the main controller 4 and the comparison circuit 3 . The setting circuit 5 is connected to the main controller 4 and the comparison circuit 3 respectively. The setting circuit 5 is used to adjust a preset threshold of the comparison circuit 3 .
[0029] The main controller 4 is connected to the wireless transmitting module 7, and the wireless transmitting module 7 is used to send an alarm signal to the user or the water supply station.
[0030] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A water meter leakage monitoring system, characterized in that: It includes a sampling resistor, a differential amplifier circuit, a comparison circuit and a main controller; The sampling resistor is installed between the power supply and the load to obtain a current signal; The differential amplifier circuit is connected to the sampling resistor and is used to send a voltage signal to the comparison circuit after amplification; The comparison circuit is connected to the differential amplifier circuit and is used to compare the voltage signal with a preset value. If the voltage signal exceeds the preset threshold, a level signal is sent to the main controller. The main controller is connected to the comparison circuit and is in a dormant state. After receiving a level signal sent by the comparison circuit, the main controller is awakened and sends out an alarm signal.
2. A water meter leakage monitoring system according to claim 1, characterized in that: A setting circuit is arranged between the main controller and the comparison circuit. The setting circuit is connected to the main controller and the comparison circuit respectively, and is used to adjust a preset threshold of the comparison circuit.
3. The leakage monitoring system for a water meter according to claim 1, characterized in that: The main controller is connected to a wireless transmission module, and the wireless transmission module is used to send an alarm signal to a user or a water supply station.
4. The leakage monitoring system for a water meter according to claim 1, characterized in that: An RC delay circuit is connected between the differential amplifier circuit and the comparison circuit.