阅读说明：本技术 一种长检测距离高精度霍尔位置信号器的设计方法 (Design method of long-detection-distance high-precision Hall position annunciator ) 是由 刘泽金 徐守祥 夏晓明 王淼 沈娟 严雨宁 杨超 曹亮 王军军 黄森 王君 雷 于 2019-11-08 设计创作，主要内容包括：本发明提供一种长检测距离高精度霍尔位置信号器,包括微小回差霍尔集成电路和与之连接的辅助电路；微小回差霍尔集成电路回差为0.3mT～1.2mT；所述辅助电路包括电源电路、电源保护电路、输出电路、信号输出保护电路；霍尔集成电路将磁信号转换为电信号输出：设有3200GS±100GS的磁钢装在活门或待检测的活动装置上,与霍尔位置传感器有14.5mm距离；本发明的霍尔位置信号器磁滞小测量精度高、能抗高电源浪涌电压、检测距离长、工作温度范围宽,能满足隔离测量、能抗高电源浪涌电压、可应用于飞机的高精度测量位置的要求。(The invention provides a long-detection-distance high-precision Hall position annunciator, which comprises a micro return difference Hall integrated circuit and an auxiliary circuit connected with the micro return difference Hall integrated circuit; the return difference of the micro-return-difference Hall integrated circuit is 0.3 mT-1.2 mT; the auxiliary circuit comprises a power supply circuit, a power supply protection circuit, an output circuit and a signal output protection circuit; the Hall integrated circuit converts the magnetic signal into an electric signal to be output: the magnetic steel provided with 3200GS +/-100 GS is arranged on a valve or a movable device to be detected, and has a distance of 14.5mm with the Hall position sensor; the Hall position annunciator has the advantages of small hysteresis, high measurement precision, high power supply surge voltage resistance, long detection distance and wide working temperature range, can meet the requirements of isolation measurement and high power supply surge voltage resistance, and can be applied to high-precision measurement positions of airplanes.)

1. A long-detection-distance high-precision Hall position annunciator is characterized by comprising a micro return difference Hall integrated circuit and an auxiliary circuit connected with the micro return difference Hall integrated circuit; the return difference of the micro-return-difference Hall integrated circuit is 0.3 mT-1.2 mT; the auxiliary circuit comprises a power supply circuit, a power supply protection circuit, an output circuit and a signal output protection circuit; the Hall integrated circuit converts the magnetic signal into an electric signal to be output: the magnetic steel provided with 3200GS +/-100 GS is arranged on a valve or a movable device to be detected, and has a distance of 14.5mm with the Hall position sensor;

the circuit is composed of a resistor R1 and a voltage regulator tube D2 which are connected in series, and provides working voltage of 4.5V-24V for the Hall integrated circuit H, and a D1 transient voltage suppressor tube is connected in parallel with a series circuit of the resistor R1 and the voltage regulator tube D2; the input end of the small return difference Hall integrated circuit is connected between the resistor R1 and the voltage regulator tube D2, and the D4 is a transient voltage suppressor tube between the output of the small return difference Hall integrated circuit H and the ground, and is a power supply protection circuit and a signal output protection circuit.

2. A long-detection-distance high-precision Hall position signaler is characterized in that a micro-return-difference Hall integrated circuit outputs a voltage output by a Hall element through a three-stage amplifying circuit, a comparison circuit and a Schmitt trigger circuit, wherein the amplifying multiple is 40-60; the three-stage amplifying circuit is connected with the comparing circuit and the Schmitt trigger circuit. And adjusting the parameters of the Hall switch of the magnetic induction intensity of the working point and the release point of the comparison circuit.

Technical Field

The invention relates to the field of magnetic sensors, in particular to a design method of a high-precision measuring position signal sensor which can be used for isolated measurement, can resist high power supply surge voltage and has long detection distance and can be applied to airplanes.

Background

The Hall position signal device is a magnetic-sensing sensor, uses Hall effect principle as its working base, can detect change of magnetic field, and can be used in various fields related to magnetic field.

The Hall position signal device has the advantages of small magnetic hysteresis, high measurement precision, high power surge voltage resistance, wide working temperature range, isolated measurement, convenient installation, vibration resistance and the like. The Hall position annunciator can convert non-electric position physical quantity into electric quantity for detection and control, and can be applied to aviation equipment in China.

Some large airplane valves with long moving distance can reach 14.5mm, and it is very difficult to realize high-precision measurement and judgment on the closing state of the valves. The conventional common position sensor mostly has the measuring distance of about 8-10 mm, the hysteresis is more than 3mm, the design for preventing high power supply surge voltage is not considered, and the measuring requirements of a large valve for long-distance measurement, the hysteresis of less than 1mm and the capability of resisting high aircraft power supply surge voltage can not be met. The technology of the invention can solve the problem and provide an innovative technical scheme.

Disclosure of Invention

The invention aims to provide a annunciator which has long detection distance, can carry out isolated measurement, can resist high power supply surge voltage and can be applied to high-precision measurement positions of airplanes.

In order to achieve the purpose, the technical scheme of the invention is that the Hall position annunciator with long detection distance and high precision is characterized by comprising a micro return difference Hall integrated circuit and an auxiliary circuit connected with the micro return difference Hall integrated circuit; the return difference of the micro-return-difference Hall integrated circuit is 0.3 mT-1.2 mT; the auxiliary circuit comprises a power supply circuit, a power supply protection circuit, an output circuit and a signal output protection circuit; the Hall integrated circuit converts the magnetic signal into an electric signal to be output: the magnetic steel provided with 3200GS +/-100 GS is arranged on a valve or a movable device to be detected, and has a distance of 14.5mm with the Hall position sensor;

the circuit is composed of a resistor R1 and a voltage regulator tube D2 which are connected in series, and provides working voltage of 4.5V-24V for the Hall integrated circuit H, and a D1 transient voltage suppressor tube is connected in parallel with a series circuit of the resistor R1 and the voltage regulator tube D2; the input end of the small return difference Hall integrated circuit is connected between the resistor R1 and the voltage regulator tube D2, and the D4 is a transient voltage suppressor tube between the output of the small return difference Hall integrated circuit H and the ground, and is a power supply protection circuit and a signal output protection circuit.

The micro return difference Hall integrated circuit is used for amplifying the voltage output by a Hall element by a three-stage amplifying circuit, a comparing circuit and a Schmitt trigger circuit with the amplification factor of 40-60; the three-stage amplifying circuit is connected with the comparing circuit and the Schmitt trigger circuit. And adjusting the magnetic induction intensity of the working point of the comparison circuit and the parameters of the Hall switch (the on and off of the Hall switch) of the release point magnetic induction intensity.

A long-distance detection high-precision Hall position annunciator is a Hall position annunciator, and 3200GS +/-100 GS magnetic steel is designed to be arranged on a valve or a movable device to be detected and matched with a Hall position sensor for use, so that long-distance detection of 14.5mm is realized.

The output voltage of the Hall position annunciator changes in the moving process of the valve with the magnetic steel, so that the moving position of the valve can be judged.

As shown in fig. 1, when the magnetic steel moves along the axis of the hall position annunciator, the output voltage changes along with the increase or decrease of the magnetic field intensity sensed by the hall integrated circuit, and the position of the valve with the magnetic steel can be judged through the output voltage value. When the distance of the valve with the magnetic steel from the Hall position annunciator (mainly the distance between the magnetic steel and the Hall position annunciator) is about 14.5mm, the magnetic field sensed by the Hall integrated circuit is weakened, the output voltage is changed from low level to high level, the distance is the distance of the reversal point, and the valve is in a closed state. When a valve (with opening tendency and position actually separated from a door) provided with magnetic steel is close to a Hall position annunciator from a distance of about 13.6mm, the distance is the working point distance (the position of a trigger point), the Hall integrated circuit senses a magnetic field and then outputs voltage from high level to low level, the valve continuously moves to the process of 0mm from the position of 13.6mm, and the output voltage is low level; the low level voltage indicates that the valve is in an open state (the opened valve and the magnetic steel), and in order to improve the precision of measuring the valve in a closed state, a Hall integrated circuit with a small return difference is designed, so that the difference (hysteresis) between the distance of the reversal point and the distance of the working point (the position of the trigger point) is smaller than 1 mm.

Has the advantages that: the invention has small magnetic hysteresis, high measurement precision, high power surge voltage resistance, long detection distance, wide working temperature range, convenient installation, vibration resistance and the like. The Hall position annunciator can convert the non-electric position physical quantity into electric quantity for detection and control. The distance sensing precision of the invention is less than 1mm, the invention is realized by a small return difference value (magnetic hysteresis) detection circuit, can isolate measurement, can resist high power supply surge voltage, and can be applied to a signal device of a high-precision measurement position of an airplane. When the circuit is designed, a power supply protection circuit and a signal output protection circuit are added, so that the power supply surge voltage can be prevented from being more than or equal to 8000V.

Drawings

FIG. 1 is a functional block diagram of a Hall position annunciator implemented in accordance with the present invention.

Fig. 2 is a specific circuit diagram of the hall position annunciator of fig. 1.

Fig. 3 is a circuit diagram of a small return difference hall integrated circuit specially designed by my company to realize small return difference high-precision measurement.

Fig. 4 is a magnetic steel diagram specially designed for realizing long-distance measurement of the hall position annunciator.

Fig. 5 is a schematic diagram of the hall position annunciator of fig. 1.

Detailed Description

In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.

FIG. 1 is a functional block diagram of a Hall position annunciator in accordance with an embodiment of the present invention. The Hall position annunciator comprises a micro return difference Hall integrated circuit and an auxiliary circuit connected with the micro return difference Hall integrated circuit. As shown in fig. 1, the auxiliary circuit includes a power supply circuit, a power supply protection circuit, an output circuit, and a signal output protection circuit. The micro return difference Hall integrated circuit converts the magnetic signal into an electric signal and outputs the electric signal.

In the circuit diagram shown in fig. 2, the operating voltage of the hall position annunciator is + 16V- +28V, a circuit consisting of a resistor R1 and a voltage regulator tube D2 provides the operating voltage of 4.5V-24V for the small return difference hall integrated circuit H, and the small return difference hall integrated circuit senses the strength of the magnetic field and outputs a voltage signal which can change from the 3 rd pin thereof; the D1 transient voltage suppressor is connected in parallel with the series circuit of the resistor R1 and the voltage regulator tube D2; the input end of the small return difference Hall integrated circuit is connected between the resistor R1 and the voltage regulator tube D2, and the D4(D4 is a transient voltage suppressor tube between the output of the small return difference Hall integrated circuit H and the ground) respectively forms a power supply protection circuit and a signal output protection circuit. The invention adds a power supply protection circuit and a signal output protection circuit during circuit design, and can make the high power supply surge voltage resistance reach more than or equal to 8000V.

FIG. 3 is a circuit diagram of a Hall integrated circuit with a small return difference designed to realize small hysteresis and high-precision measurement of a Hall position annunciator, wherein Q1-Q8 and R1-R5 form a voltage supply circuit for a Hall element H; Q9-Q11, R6-R9 constitute three-stage amplifying circuit (amplification factor 40-60), amplify the voltage value that the Hall element outputs; Q12-Q21, R10-R11 constitute the comparison circuit (Q12, Q13) and Schmitt trigger circuit, adjust the working point magnetic induction intensity of the comparison circuit and release point magnetic induction intensity technological parameter, reach the small return difference requirement; Q22-Q24, R12-R14 constitute the output circuit, output high level voltage when the magnetic field intensity is weak, output the low level voltage when the magnetic field intensity is strong. In order to realize the small hysteresis and high-precision measurement of the Hall position annunciator, a specially designed micro return difference Hall integrated circuit chip diagram of the company has the minimum return difference of 0.3 mT-1.2 mT.

Fig. 4 is a magnetic steel diagram specially designed by the company to realize the long-distance measurement of the hall position annunciator, and the design value of the magnetic field strength is 3200GS +/-100 GS. The left drawing in fig. 4 is a front view, and the right drawing is an internal sectional view (rectangle) in the left drawing.

Fig. 5 is a schematic diagram of the hall position annunciator, and the position of the valve can be judged by the change of the output voltage of the hall position annunciator caused by the change of the moving position of the valve with the magnetic steel.

The Hall position annunciator is subjected to a large number of environmental and mechanical tests, and test items comprise high and low temperature tests, high temperature work, low temperature work, temperature impact, steady-state damp and hot, vibration, impact and high temperature service life. All indexes after the test meet the requirements. Tables 1 and 2 are normal temperature test data tables of the hall position annunciators, and the hall position annunciators in table 1 test data for a long distance of 14.5 mm. The small hysteresis test data of the hall position annunciator of fig. 1 of less than 1mm are shown in table 2. The data shows that the Hall position annunciator has small magnetic hysteresis (less than 1mm), the measuring distance of 14.5mm and high measuring precision. The working temperature range is wide (minus 55 ℃ to +125 ℃), and the use requirement can be met.

TABLE 1

8000V voltage is applied between the interfaces at the two ends of +28V and 0V of a working power supply for testing

TABLE 2

And applying 8000V voltage between the interfaces at the two ends of the +28V and 0V of the working power supply, and then testing.