CN-224203287-U - Sinking type direct current metering module based on TMR sensing technology

CN224203287UCN 224203287 UCN224203287 UCN 224203287UCN-224203287-U

Abstract

The utility model is applicable to the technical field of current sensing and metering, and relates to a sinking type direct current metering module based on a TMR sensing technology, which comprises an MCU management unit, a measuring chip unit, a current sampling circuit, a voltage sampling circuit, an addressing sampling circuit, a pulse output module and a communication interaction module; the MCU management unit is respectively connected with the measurement chip unit, the pulse output module, the communication interaction module and the addressing sampling circuit, the current sampling circuit and the voltage sampling circuit are respectively connected with the measurement chip unit, and the current sampling circuit is also connected with the TMR sensor. The direct current metering module is simple in structure and convenient to work, and metering accuracy and anti-interference capability of the direct current metering module are effectively improved.

Inventors

LIU ZHOUJIAN
ZHANG LEI
MA LIANG
HE ZHAOHUI
LIU XING

Assignees

威胜信息技术股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250415

Claims (7)

1. Sinking type direct current metering module based on TMR sensing technology, characterized by comprising: The system comprises an MCU management unit, a measurement chip unit, a current sampling circuit, a voltage sampling circuit, an addressing sampling circuit, a pulse output module and a communication interaction module; The MCU management unit is respectively connected with the measurement chip unit, the pulse output module, the communication interaction module and the addressing sampling circuit, the current sampling circuit and the voltage sampling circuit are respectively connected with the measurement chip unit, and the current sampling circuit is also connected with the TMR sensor.
2. The sinking direct current metering module based on the TMR sensing technology according to claim 1, wherein the voltage sampling circuit comprises a resistor RA10, a resistor RT1, a resistor RT2, a resistor RT3, a capacitor C45 and a capacitor C20, one end of the resistor RA10 is connected with a voltage signal U1, the other end of the resistor RA10 is respectively connected with one end of the resistor RT1 and one end of the resistor RT2, the other end of the resistor RT1 is connected with one end of the resistor RT3, the other end of the resistor RT2 is connected with one end of the capacitor C45, the other end of the resistor RT3 is connected with one end of the capacitor C20, and the other end of the capacitor C45 is connected with the other end of the capacitor C20.
3. The sinking direct current metering module based on the TMR sensing technology according to claim 1, wherein the current sampling circuit comprises a resistor RB1, a resistor RB2, a resistor RB3, a resistor RB4, a resistor RB6, a resistor RB7, a capacitor CB1 and a capacitor CB2, one end of the resistor RB1 is respectively connected with one end of the resistor RB3 and one end of the resistor RB6, the other end of the resistor RB3 is connected with one end of the capacitor CB1, one end of the resistor RB2 is respectively connected with one end of the resistor RB4 and one end of the resistor RB7, the other end of the resistor RB4 is connected with one end of the capacitor CB2, and the other end of the capacitor CB1 is connected with the other end of the capacitor CB 2.
4. The sinking direct current metering module based on the TMR sensing technology according to claim 1, wherein the addressing sampling circuit comprises a resistor R12, a resistor R2 and a capacitor C10, one end of the resistor R12 is respectively connected with one end of the resistor R2 and one end of the capacitor C10, and the other end of the resistor R2 is connected with the other end of the capacitor C10.
5. The sinking direct current metering module based on TMR sensing technology as claimed in claim 1, wherein the model of the MCU management unit is V8510P.
6. The sinking direct current metering module based on the TMR sensing technology as claimed in claim 1, wherein the measuring chip of the measuring chip unit is RN8209.
7. The sinking type direct current metering module based on TMR sensing technology as claimed in claim 1, wherein the communication interaction module supports RS485 communication, adopts optocoupler isolation, and comprises 2400bps, 4800bps and 9600bps.

Description

Sinking type direct current metering module based on TMR sensing technology Technical Field The utility model belongs to the technical field of current sensing and metering, and particularly relates to a sinking type direct current metering module based on a TMR sensing technology. Background In order to promote and exert the integrated benefit of resource sharing, ensure the efficient operation of the base station, china iron tower stock company provides a detailed data basis for energy conservation and improvement of the base station for three telecom operators, and provides a metering scheme of the static multi-loop direct current electric energy meter for realizing energy conservation and emission reduction of the communication industry. The existing multi-loop direct current measurement electric energy meter adopts a mode of MCU+a plurality of sensors, voltage and current are accessed through external terminals, current is realized by inputting analog voltage signals through a Hall sensor, a fluxgate sensor or a manganese copper shunt, and if a main control MCU main control module has a problem, each path of measurement is invalid. The Hall sensor has the defects of low sensitivity, obvious temperature drift, sensitivity to the amplitude and the direction of a magnetic field, limited measurement distance and the like, the external magnetic field possibly influences the measured value, the fluxgate sensor has a complex structure and high cost and is easily influenced by the external magnetic field and the temperature, the measurement accuracy is ensured by needing to be calibrated regularly, and the manganese-copper sensor has the defects of low piezoresistive coefficient, short service life, inconvenient installation, easy oxidation, large resistance temperature coefficient, potential safety hazard in use and the like. The utility model provides a patent application of publication No. CN118330284A provides an iron tower base station intelligent direct current electric energy metering module based on hall sensor, including device casing and power distribution unit, the cavity has been seted up to the inside of device casing, fixedly connected with fixed baffle on the inner wall of cavity, the inside of fixed baffle is provided with dustproof grid, fixed baffle is last to be fixedly provided with switching structure, switching structure includes the switch motor, switch motor fixed mounting is in on the fixed baffle, the output of switch motor passes through the switching shaft of shaft coupling fixedly connected with coaxial setting. The metering module in this patent application measures through hall sensor, and the accuracy is not high, exists the drawback the same as prior art. Therefore, how to provide a metering module with high detection precision and strong anti-interference capability is a problem to be solved by the person skilled in the art. Disclosure of utility model Aiming at the defects in the prior art, the utility model aims to provide a sinking type direct current metering module based on a TMR sensing technology, so as to solve the problems of low detection precision and weak anti-interference capability of the metering module in the prior art. In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a sinking type direct current metering module based on TMR sensing technology, which comprises the following components: The system comprises an MCU management unit, a measurement chip unit, a current sampling circuit, a voltage sampling circuit, an addressing sampling circuit, a pulse output module and a communication interaction module; The MCU management unit is respectively connected with the measurement chip unit, the pulse output module, the communication interaction module and the addressing sampling circuit, the current sampling circuit and the voltage sampling circuit are respectively connected with the measurement chip unit, and the current sampling circuit is also connected with the TMR sensor. Further, the voltage sampling circuit comprises a resistor RA10, a resistor RT1, a resistor RT2, a resistor RT3, a capacitor C45 and a capacitor C20, wherein one end of the resistor RA10 is connected with a voltage signal U1, the other end of the resistor RA10 is respectively connected with one end of the resistor RT1 and one end of the resistor RT2, the other end of the resistor RT1 is connected with one end of the resistor RT3, the other end of the resistor RT2 is connected with one end of the capacitor C45, the other end of the resistor RT3 is connected with one end of the capacitor C20, and the other end of the capacitor C45 is connected with the other end of the capacitor C20. Further, the current sampling circuit comprises a resistor RB1, a resistor RB2, a resistor RB3, a resistor RB4, a resistor RB6, a resistor RB7, a capacitor CB1 and a capacitor CB2, wherein one end of the resistor RB1 is respectively connected