CN210625684U

CN210625684U - Magnetic Induction Metering Circuit Based on Unipolar Dual Hall

Info

Publication number: CN210625684U
Application number: CN201921431399.3U
Authority: CN
Inventors: 伍喆; 毛程权; 余金存
Original assignee: Zhejiang Viewshine Intelligent Meter Co Ltd
Current assignee: Zhejiang Viewshine Intelligent Meter Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-26
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a magnetic induction metering circuit based on unipolar double Halls. In the realization process of the utility model, when the magnetic steel S pole is close and the magnetic field strength is greater than the S-shaped Hall induction threshold, the S-shaped Hall control pin outputs a low level to the single-chip microcomputer; when the S-shaped Hall does not detect the S-shaped magnetic field When the S-type Hall control pin outputs a high level to the microcontroller; when the N pole of the magnetic steel is close and the magnetic field strength is greater than the N-type Hall sensing threshold, the N-type Hall control pin outputs a low level to the microcontroller; when the N-type Hall control pin outputs a low level to the microcontroller; When the Hall does not detect an N-type magnetic field, the N-type Hall control pin outputs a high level to the microcontroller. After the two IO ports of the single-chip microcomputer detect the low-level signal in turn, the single-chip computer stores a unit of measurement. The circuit design of the utility model is simple, which is beneficial to the miniaturization of the equipment and reduces the cost of raw materials; the double-hall effectively avoids the problems of multiple counting and missing counting, and can also detect whether it is under magnetic attack, which greatly improves the accuracy of counting Spend.

Description

Magnetic induction metering circuit based on unipolar double Hall

Technical Field

The utility model belongs to the technical field of instrument intelligent control, a circuit based on a S utmost point unipolar response hall and a N polarity unipolar response hall receive magnetic force to produce pulse signal and carry out instrument measurement is related to.

Background

Along with the development of the microprocessor and the artificial intelligence technology, the development of the instrument industry to intellectualization is achieved, namely the intelligent level of the instruments of the intelligent robot is improved, the intelligent level is improved, the speed is increased quickly, and the life of people is easier.

Meter electronics directly impact the interests of users and companies, and meters must be required to count accurately to avoid missed and multiple counts.

Currently, the country has a uniform standard for the meter industry counts, while different regions have different standards for counts. Each meter company also has its own counting standard. The current mainstream schemes include a photoelectric counting detection method, which uses a photoelectric signal generated when a character wheel rotates to detect, and the like. Therefore, the metering circuit based on the unipolar double-Hall magnetic force pulse signal is designed, the metering circuit is applied to a low-power-consumption low-cost intelligent instrument, the problems of high power consumption and complex process structure in similar application are solved, and the problem of excessive counting or missing counting after magnetic attack during normal work can be avoided.

Disclosure of Invention

The utility model aims at providing a magnetic induction measuring circuit based on two halls of unipolar. The circuit is based on a S-pole unipolar induction Hall circuit and an N-pole unipolar induction Hall circuit which generate pulse signals under the action of magnetic force.

The utility model discloses a singlechip U1, power J1, S type hall U2, N type hall U3, crystal oscillator Y1, resistance R1, first electric capacity C1, second electric capacity C2, third electric capacity C3, fourth electric capacity C4, fifth electric capacity C5, sixth electric capacity C6, seventh electric capacity C7;

one end of a resistor R1 is connected with a power supply anode VCC, the other end of a resistor R1 is connected with a first capacitor C1 and a single chip microcomputer 10 pin, and the other end of the first capacitor C1 is grounded; one end of a crystal oscillator Y1 is connected with a pin of the singlechip microcomputer 11 and one end of a second capacitor C2, the other end of a crystal oscillator Y1 is connected with a pin of the singlechip microcomputer 12 and one end of a third capacitor C3, and the other end of the second capacitor C2 and the other end of the third capacitor C3 are grounded; a pin 17 of the single chip microcomputer is grounded, a pin 18 of the single chip microcomputer is connected with a power supply anode VCC and one end of a fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded; a VDD pin of the S-shaped Hall U2 is connected with a power supply anode VCC, a GND pin is grounded, an OUT pin is connected with a pin 41 of the singlechip and is also connected with one end of a fifth capacitor C5, and the other end of the fifth capacitor C5 is grounded; the VDD pin of the N-type Hall U3 is connected with a power supply anode VCC, the GND pin is grounded, the OUT pin is connected with the pin 62 of the singlechip and simultaneously connected with one end of a sixth capacitor C6, and the other end of the sixth capacitor C6 is grounded.

The 1 st pin of the power supply J1 is connected with one end of the seventh capacitor C7, and outputs the power supply VCC, and the 2 nd pin of the power supply J1 and the other end of the seventh capacitor C7 are grounded.

The single chip microcomputer U1 adopts a chip with the model of R7F0C003M2 DFB.

The utility model discloses beneficial effect as follows:

the circuit of the utility model has simple design, is beneficial to the miniaturization of equipment and reduces the cost of raw materials; the double-Hall effect avoids the problems of multiple counting and missing counting, and can detect whether the magnetic attack is received, thereby greatly improving the counting accuracy.

Drawings

Fig. 1 is a circuit diagram of the present invention based on a S-pole unipolar inductive hall and an N-pole unipolar inductive hall generating pulse signals by magnetic force;

FIG. 2 is a schematic diagram of the level state of the S-type and N-type Hall pins of the present invention during measurement;

Detailed Description

In order to explain technical contents, structural features, and achieved effects of the present invention in detail, the following detailed description is made with reference to the accompanying drawings in combination with the embodiments.

The utility model discloses the working process is as follows:

the power supply J1 provides a 3V-6V power supply, the S-shaped Hall U2 and the N-shaped Hall U3 are welded on the PCB side by side, a magnetic steel with an S pole pointing to the center of the character wheel and a magnetic steel with an N pole pointing to the center of the character wheel are pre-installed on the character wheel, the two magnetic steels are 180 degrees apart, when the S pole of the magnetic steel is close to the magnetic field intensity larger than the S-shaped Hall sensing threshold value, the S-shaped Hall control pin outputs a low level to the single chip microcomputer U1; when the S-shaped Hall does not detect the S-shaped magnetic field, the S-shaped Hall control pin outputs high level to the single chip microcomputer U1; when the N pole of the magnetic steel is close to and the magnetic field intensity is larger than the N-type Hall sensing threshold value, the N-type Hall control pin outputs a low level to the singlechip; when the N-type Hall does not detect the N-type magnetic field, the N-type Hall control pin outputs high level to the singlechip. Two IO ports HALL1_ INTP6 and HALL1_ INTP7 of the single chip microcomputer respectively detect low level signals in sequence, and the single chip microcomputer stores a metering unit.

When the outside has magnetic field interference, the following 2 kinds of condition singlechips all can detect the measurement unusual and send corresponding protection instruction to the instrument: 1 simultaneously triggers the S-type Hall and the N-type Hall IO ports HALL1_ INTP6 and HALL1_ INTP7 to be low level. And 2, when the S-type Hall and the N-type Hall are not triggered alternately, the N-type Hall is continuously triggered for more than 2 times or the S-type Hall is continuously triggered for more than 2 times.

Claims

1. The magnetic induction metering circuit based on the unipolar double-Hall sensor is characterized by comprising a single-chip microcomputer U1, a power supply J1, an S-shaped Hall U2, an N-shaped Hall U3, a crystal oscillator Y1, a resistor R1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7;

one end of a resistor R1 is connected with a power supply anode VCC, the other end of a resistor R1 is connected with a first capacitor C1 and a single chip microcomputer 10 pin, and the other end of the first capacitor C1 is grounded; one end of a crystal oscillator Y1 is connected with a pin of the singlechip microcomputer 11 and one end of a second capacitor C2, the other end of a crystal oscillator Y1 is connected with a pin of the singlechip microcomputer 12 and one end of a third capacitor C3, and the other end of the second capacitor C2 and the other end of the third capacitor C3 are grounded; a pin 17 of the single chip microcomputer is grounded, a pin 18 of the single chip microcomputer is connected with a power supply anode VCC and one end of a fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded; a VDD pin of the S-shaped Hall U2 is connected with a power supply anode VCC, a GND pin is grounded, an OUT pin is connected with a pin 41 of the singlechip and is also connected with one end of a fifth capacitor C5, and the other end of the fifth capacitor C5 is grounded; a VDD pin of the N-type Hall U3 is connected with a power supply anode VCC, a GND pin is grounded, an OUT pin is connected with a pin 62 of the singlechip and simultaneously connected with one end of a sixth capacitor C6, and the other end of the sixth capacitor C6 is grounded;

2. The magnetic induction metering circuit based on the unipolar double-Hall circuit according to claim 1, wherein the single chip microcomputer U1 is a chip with a model number of R7F0C003M2 DFB.