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CN-122015986-A - Control system of electromagnetic water meter

CN122015986ACN 122015986 ACN122015986 ACN 122015986ACN-122015986-A

Abstract

The invention discloses a control system of an electromagnetic water meter, which comprises a water meter and an electromagnetic flow transducer, wherein the water meter comprises an electromagnetic flow sensor and an electromagnetic flow transducer, the electromagnetic flow sensor comprises a measuring conduit, a measuring electrode, an exciting coil, a measuring state distinguishing electrode and a horizontal plane balancing pipe, the measuring electrode, the exciting coil and the measuring state distinguishing electrode are all arranged on the measuring conduit, a thick pipe section is arranged on the measuring conduit, the measuring state distinguishing electrode is arranged on the thick pipe section, the horizontal plane balancing pipe is connected with the thick pipe section, the electromagnetic flow transducer comprises a singlechip system, a controllable exciting current module, a constant-current power supply, a flow signal amplifying part and a power supply part, and the measuring state distinguishing electrode is connected with the singlechip system by signals.

Inventors

  • ZHANG BINGRONG
  • ZHANG HAOCHEN

Assignees

  • 上海凯蒙特科技发展有限公司

Dates

Publication Date
20260512
Application Date
20260203

Claims (9)

  1. 1. A control system of an electromagnetic water meter comprises a water meter (10), and is characterized in that the water meter (10) comprises an electromagnetic flow sensor and an electromagnetic flow converter, the electromagnetic flow sensor comprises a measuring conduit (1), a measuring electrode (2), an exciting coil (3), a measuring state distinguishing electrode (9) and a horizontal plane balancing pipe (13), the measuring electrode (2), the exciting coil (3) and the measuring state distinguishing electrode (9) are all arranged on the measuring conduit (1), a thick pipe section (11) is arranged on the measuring conduit (1), the measuring state distinguishing electrode (9) is arranged on the thick pipe section (11), the horizontal plane balancing pipe (13) is connected with the thick pipe section (11), the electromagnetic flow converter comprises a single chip microcomputer system (4), a controllable exciting current module (5), a constant current power supply (8), a flow signal amplifying part (6) and a power supply part (7), the measuring state distinguishing electrode (9) is in signal connection with the single chip microcomputer system (4), the single chip microcomputer system (4) is in control connection with the controllable exciting current module (5), the controllable exciting current module (3) is in signal connection with the measuring state distinguishing part (6), the flow signal amplifying part (6) is in signal connection with the single chip microcomputer system (4), and the power supply part (7) supplies power for the single chip microcomputer system (4) and the flow signal amplifying part (6).
  2. 2. The control system of an electromagnetic water meter according to claim 1, wherein the power supply part (7) is any one of a solar panel and a mobile phone charger, and when the solar panel is selected, the output voltage is 5V, and the control system is matched with the system.
  3. 3. The control system of an electromagnetic water meter according to claim 1, wherein the exciting current provided by the controllable exciting current module (5) to the exciting coil (3) is 100mA, the exciting voltage is 5V, and the power consumption of the exciting coil (3) during operation is 0.5W.
  4. 4. A control system for an electromagnetic water meter according to claim 1, characterized in that the diameter of the measuring conduit (1) is 15mm, adapted to a domestic tap water pipe, the upper measuring limit of which is 2m/s.
  5. 5. The control system of an electromagnetic water meter according to claim 1, wherein four electronic switches K1, K2, K3 and K4 are arranged in the controllable exciting current module (5), the four electronic switches K1, K2, K3 and K4 are connected in series in an exciting current output loop, and the singlechip system (4) controls the working state of the controllable exciting current module (5) by controlling the on-off of the four electronic switches K1, K2, K3 and K4.
  6. 6. The control system of an electromagnetic water meter according to claim 1, wherein the rear end of the meter (10) is provided with a replaceable stub (12).
  7. 7. The control system of an electromagnetic water meter according to claim 1, wherein the sensor coefficient K is pre-stored in the single chip microcomputer system (4).
  8. 8. The control system of an electromagnetic water meter according to claim 7, wherein the singlechip system (4) can record the power-down time and upload the power-down time to a related department through the Internet, and can receive a coefficient correction signal of a key remote control operation lever to adjust the sensor coefficient K.
  9. 9. The control system of an electromagnetic water meter according to claim 1, wherein the flow signal amplifying part (6) is a low-power consumption instrumentation amplifier, the constant current power supply is a low-power consumption constant current power supply module, and the measurement state discriminating electrode outputs 0 level when contacting liquid and outputs 1 level when floating.

Description

Control system of electromagnetic water meter Technical Field The invention relates to the technical field of flowmeters, in particular to a control system of an electromagnetic water meter. Background Heretofore, the water meters for measuring household water consumption are mechanical water meters, which measure the flow of water according to the rotational speed of the water flow impact measuring component. Meanwhile, the measuring component needs to be pushed to rotate by the measured fluid, so that fluid pressure loss can be generated, and once the measuring component is abnormal due to mechanical abrasion, the measuring component cannot be repaired, and the measuring component cannot be regularly calibrated and corrected. In addition, the mechanical water meter does not need electricity, and the measured water consumption cannot be transmitted to a water management department through the Internet. The special single-chip microcomputer system appears in the market at present, the revolution of the mechanical water meter measuring component is connected into the single-chip microcomputer system through the A/D converter, related data such as water consumption and the like are obtained through calculation and transmitted to the water service management department through the Internet, but from the measurement principle, the special single-chip microcomputer system still belongs to the mechanical water meter in nature, and the defects of low measurement precision and incapability of regular verification still exist. The electromagnetic flowmeter has the advantages of high measurement precision (0.3-0.5 level) and no movable parts or resistance parts in the measuring tube, but the electromagnetic flowmeter is used as an industrial or commercial measuring instrument, has the problems of high use cost and high manufacturing cost, and is difficult to be directly used as a household water meter. The national standard of electromagnetic flowmeter prescribes that the flow rate range of the fluid to be measured is 1m/s < V (upper limit of measurement) <12.5m/s, and in order to ensure that the whole series caliber is accurately measured in the flow range, the exciting current is usually 300-500mA, the exciting voltage is about 24V, the electric power reaches 7.2-12W, and the electromagnetic flowmeter needs to operate without stopping all the year round, so that the daily power consumption is 172-288W, the monthly power consumption is 5184-8640W, huge electric charge can not be born by tap water users, and the application of the electromagnetic flowmeter in household water metering is limited. Disclosure of Invention The invention aims to provide a control system of an electromagnetic water meter, which is used for solving the problems in the background technology. The electromagnetic flow converter comprises a single chip microcomputer system, a controllable exciting current module, a constant current power supply, a flow signal amplifying part and a power supply part, wherein the measuring state distinguishing electrode is connected with the single chip microcomputer system in a signal mode, the single chip microcomputer system is connected with the controllable exciting current module in a control mode, the controllable exciting current module is electrically connected with the exciting coil, the measuring electrode is connected with the flow signal amplifying part in a signal mode, the flow signal amplifying part is connected with the single chip microcomputer system in a signal mode, the constant current power supply is used for providing constant reference current for exciting current, and the power supply part is used for supplying power to the single chip microcomputer system. Further, the power supply part is any one of a solar panel and a mobile phone charger, and when the solar panel is selected, the output voltage is 5V and is matched with the system. Further, the exciting current provided by the controllable exciting current module to the exciting coil is 100mA, the exciting voltage is 5V, and the power consumption of the exciting coil during working is 0.5W. Further, the diameter of the measuring conduit is 15mm, the measuring conduit is adapted to a household tap water pipe, and the upper measuring limit is 2m/s. Further, four electronic switches K1, K2, K3 and K4 are arranged in the controllable exciting current module, the four electronic switches K1, K2, K3 and K4 are connected in series in the exciting current output loop, and the singlechip system controls the working state of the controllable exciting current module by controlling the on-off of the four electronic switches K1, K2, K3 and K4. Furthermore, the rear end of the water meter is provided with a replaceable short tube. Furthermore, a sensor coefficient K is pre-stored in the singlechip system, and the sensor coefficient K is obtained by checking a manufacturer on standard checking equipment of national authentication and is used for fl