Low-power-consumption real-time sampling electromagnetic water meter
By designing a low-power real-time sampling electromagnetic water meter, using sensors and converters set around the detection tube, including a power conversion module and a processing module, the existing electromagnetic water meters have solved the problems of high power consumption and difficult real-time measurement, and achieved The effect of low power consumption and real-time sampling is achieved.
Patent Information
- Application Number
- CN202323465323.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-19
AI Technical Summary
Due to the large power consumption of existing electromagnetic water meters, the power supply life of lithium batteries is shorter, and real-time measurement cannot be achieved by interval measurement sampling.
A low-power real-time sampling electromagnetic water meter is designed, which uses a sensor surrounding the detection tube and a converter connected to the sensor, including a power conversion module and a processing module. The processing module includes a CPU module, a constant current control module, and an excitation module. Switching modules, etc., realize real-time sampling and low-power consumption through these modules.
It achieves real-time sampling under low power consumption, has a simple structure, low power consumption, and can continuously measure water flow in real time.
Smart Images
Figure CN222379138U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flow meters, in particular to a low-power consumption real-time sampling electromagnetic water meter. Background Art
[0002] An electromagnetic water meter is an instrument that uses the principle of electromagnetic induction to measure water flow. Its working principle is based on Faraday's law of electromagnetic induction, which states that when a conductor moves in a magnetic field, an electromotive force is generated at both ends of the conductor. In an electromagnetic water meter, when water flows through a magnetic field, an electromotive force is generated, thereby measuring the water flow. An electromagnetic water meter consists of two parts: a magnetic circuit system and an electromagnetic sensor. The magnetic circuit system generates a strong magnetic field, and when water flows through the magnetic field, an electromotive force is generated in the water. The electromagnetic sensor measures this electromotive force and converts it into a digital signal of the water flow.
[0003] Since electromagnetic water meters need to generate magnetic fields through current excitation, the power consumption of electromagnetic water meter products is relatively large. Generally, electromagnetic water meters are powered by built-in lithium batteries, which have a great impact on the life of lithium batteries. Interval measurement sampling is usually used for measurement to ensure the battery life. However, this application method cannot measure normally during the sampling interval. Therefore, a low-power real-time sampling electromagnetic water meter is proposed to solve the above problems. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a low-power consumption real-time sampling electromagnetic water meter.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A low-power real-time sampling electromagnetic water meter, comprising a sensor arranged around a detection tube and a converter connected to the sensor, the converter comprising a housing and a mainboard, the mainboard comprising a power conversion module and a processing module powered by the power conversion module;
[0007] The sensor is used to generate an electrode signal when the conductive liquid flows through the sensor;
[0008] The processing module comprises a CPU module, a constant current control module, an excitation switching module, a differential amplifier module, a chopping switching module, a signal amplifier module, an AD conversion module, a signal output module and a liquid crystal display module. The output end of the sensor is connected to the input end of the differential amplifier module, the output end of the differential amplifier module is connected to the input end of the chopping switching module, the output end of the chopping switching module is connected to the input end of the signal amplifier module, the output end of the signal amplifier module is connected to the input end of the AD conversion module, and the input end of the AD conversion module is connected to the input end of the CPU module; the output end of the CPU module is respectively connected to the input ends of the constant current control module, the excitation switching module, the signal output module, the liquid crystal display module and the chopping switching module; the output end of the constant current control module is connected to the input end of the excitation switching module, and the output end of the excitation switching module is connected to the input end of the sensor.
[0009] Furthermore, the sensor includes a catheter assembly connected to the detection tube through which conductive liquid can flow, a magnetic circuit system fixed to the detection tube by a flange, and a sensor housing that surrounds the detection tube and covers the catheter assembly and the magnetic circuit system, and the magnetic circuit system is arranged around the catheter assembly.
[0010] Furthermore, the magnetic circuit system includes a pole shoe, a yoke, an iron core and a coil, the catheter assembly is connected to the detection tube, the yoke presses the iron core and the pole shoe to ensure the closure of the magnetic circuit, and the coil is wound around the outside of the iron core and the pole shoe.
[0011] Furthermore, the iron core is made of 1J85 Permalloy series moment magnetic steel.
[0012] Furthermore, the excitation switching module adopts 60mA excitation current, and the CPU module controls the switching of the excitation current with 20ms square wave pulses to control the magnetic field conversion.
[0013] Furthermore, the processing module also includes a remote transmission module, and the output end of the CPU module is connected to the input end of the remote transmission module.
[0014] The beneficial effects of the utility model are:
[0015] The processing module adopted in the device can perform real-time sampling during use, and has a simple structure and low power consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural schematic diagram of a low-power real-time sampling electromagnetic water meter proposed by the utility model;
[0017] Figure 2This is a cross-sectional structural diagram of a low-power real-time sampling electromagnetic water meter proposed by the utility model without the converter;
[0018] Figure 3 This is a structural block diagram of the main board in the water retaining ring of a low-power real-time sampling electromagnetic water meter proposed by the utility model.
[0019] In the figure: 1. converter; 11. power conversion module; 12. remote transmission module; 13. CPU module; 14. constant current control module; 15. excitation switching module; 16. signal output module; 17. liquid crystal display module; 18. AD conversion module; 19. signal amplification module; 110. chopping switching module; 111. differential amplification module; 2. sensor; 21. flange; 22. catheter assembly; 23. pole shoe; 24. yoke; 25. core; 26. coil; 27. sensor housing; 3. detection tube. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0021] Reference Figure 1-3 In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0022] A low-power real-time sampling electromagnetic water meter, comprising a sensor 2 arranged around a detection tube 3 and a converter 1 connected to the sensor 2, wherein the converter 1 comprises a housing and a mainboard, and the mainboard comprises a power conversion module 11 and a processing module powered by the power conversion module 11;
[0023] The sensor 2 is used to generate an electrode signal when the conductive liquid flows through the sensor 2;
[0024] The processing module includes a CPU module 13, a constant current control module 14, an excitation switching module 15, a differential amplifier module 111, a chopping switching module 110, a signal amplifier module 19, an AD conversion module 18, a signal output module 16 and a liquid crystal display module 17. The output end of the sensor 2 is connected to the input end of the differential amplifier module 111, the output end of the differential amplifier module 111 is connected to the input end of the chopping switching module 110, the output end of the chopping switching module 110 is connected to the input end of the signal amplifier module 19, and the signal The output end of the signal amplification module 19 is connected to the input end of the AD conversion module 18, and the input end of the AD conversion module 18 is connected to the input end of the CPU module 13; the output end of the CPU module 13 is respectively connected to the input ends of the constant current control module 14, the excitation switching module 15, the signal output module 16, the liquid crystal display module 17, and the chopping switching module 110; the output end of the constant current control module 14 is connected to the input end of the excitation switching module 15, and the output end of the excitation switching module 15 is connected to the input end of the sensor 2.
[0025] The sensor 2 includes a conduit assembly 22 connected to the detection tube 3 for allowing conductive liquid to flow through, a magnetic circuit system fixed to the detection tube 3 via a flange 21, and a sensor housing 27 surrounding the detection tube 3 and covering the conduit assembly 22 and the magnetic circuit system. The magnetic circuit system is arranged around the conduit assembly 22.
[0026] The magnetic circuit system includes a pole shoe 23, a yoke 24, an iron core 25 and a coil 26. The catheter assembly 22 is connected to the detection tube 3. The yoke 24 presses the iron core 25 and the pole shoe 23 to ensure that the magnetic circuit is closed. The coil 26 is wound around the outside of the iron core 25 and the pole shoe 23.
[0027] The iron core 25 is made of 1J85 Permalloy series moment magnetic steel.
[0028] The excitation switching module 15 uses 60mA excitation current, and the CPU module 13 controls the switching of the excitation current with a 20ms square wave pulse to control the magnetic field conversion.
[0029] The processing module further includes a remote transmission module 12 , and an output end of the CPU module 13 is connected to an input end of the remote transmission module 12 .
[0030] During use, the CPU module in the mainboard controls the constant current control module to output a constant current, controls the excitation switching module to switch the magnetic field, and the excitation part uses a 60mA excitation current. The CPU module controls the switching of the excitation current with a 20ms square wave pulse to control the magnetic field conversion; the conversion is performed every 3s. After each conversion, the magnetic field is maintained by the moment magnet core material as a magnetic field of equal strength in the opposite direction. The flow signal generated under this magnetic field is collected in real time by the differential amplifier circuit, and primary amplification is performed, and then enters the chopping switching module. The CPU module controls the chopping switching, and the signal output by the chopping switching module enters the signal amplification module for amplification, and then enters the AD conversion module to convert it into a digital quantity. The CPU module reads the data calculation of the AD conversion module to obtain the flow data, which is controlled by the CPU module to be displayed on the LCD display module, and outputs pulses, frequencies, RS485 and other signals through the signal output module. In addition, the CPU module can also transmit data wirelessly to the cloud platform through the remote transmission module, and real-time sampling is performed during use, with low power consumption.
[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A low-power real-time sampling electromagnetic water meter, comprising a sensor (2) arranged around a detection tube (3) and a converter (1) connected to the sensor (2), characterized in that: The converter (1) comprises a housing and a mainboard, the mainboard comprising a power conversion module (11) and a processing module powered by the power conversion module (11); The sensor (2) is used to generate an electrode signal when the conductive liquid flows through the sensor (2); The processing module comprises a CPU module (13), a constant current control module (14), an excitation switching module (15), a differential amplifier module (111), a chopping switching module (110), a signal amplifier module (19), an AD conversion module (18), a signal output module (16) and a liquid crystal display module (17); the output end of the sensor (2) is connected to the input end of the differential amplifier module (111); the output end of the differential amplifier module (111) is connected to the input end of the chopping switching module (110); the output end of the chopping switching module (110) is connected to the input end of the signal amplifier module (19); The output end of the signal amplification module (19) is connected to the input end of the AD conversion module (18), and the input end of the AD conversion module (18) is connected to the input end of the CPU module (13); the output end of the CPU module (13) is respectively connected to the input ends of the constant current control module (14), the excitation switching module (15), the signal output module (16), the liquid crystal display module (17), and the chopping switching module (110); the output end of the constant current control module (14) is connected to the input end of the excitation switching module (15), and the output end of the excitation switching module (15) is connected to the input end of the sensor (2).
2. A low-power real-time sampling electromagnetic water meter according to claim 1, characterized in that: The sensor (2) comprises a conduit assembly (22) connected to the detection tube (3) and allowing a conductive liquid to flow through, a magnetic circuit system fixed to the detection tube (3) via a flange (21), and a sensor housing (27) surrounding the detection tube (3) and covering the conduit assembly (22) and the magnetic circuit system, wherein the magnetic circuit system is arranged around the conduit assembly (22).
3. A low-power real-time sampling electromagnetic water meter according to claim 2, characterized in that: The magnetic circuit system comprises a pole shoe (23), a yoke (24), an iron core (25) and a coil (26); the catheter assembly (22) is connected to the detection tube (3); the yoke (24) presses the iron core (25) and the pole shoe (23) to ensure that the magnetic circuit is closed; and the coil (26) is wound around the outside of the iron core (25) and the pole shoe (23).
4. A low-power real-time sampling electromagnetic water meter according to claim 3, characterized in that: The iron core (25) is made of 1J85 Permalloy series moment magnetic steel.
5. A low-power real-time sampling electromagnetic water meter according to claim 1, characterized in that: The excitation switching module (15) uses a 60 mA excitation current, and the CPU module (13) controls the switching of the excitation current using a 20 ms square wave pulse to control the magnetic field conversion.
6. A low-power real-time sampling electromagnetic water meter according to claim 1, characterized in that: The processing module also includes a remote transmission module (12), and the output end of the CPU module (13) is connected to the input end of the remote transmission module (12).