Portable low-intensity magnetic field testing device based on Hall effect

Abstract

The utility model belongs to the technical field of magnetic field testing, and particularly relates to a portable weak magnetic field testing device based on a Hall effect, which comprises a tester, a single chip microcomputer is arranged in the tester, a magnetic field sensor is further arranged in the tester, a Hall sensor based on the Hall effect is arranged on the magnetic field sensor, and the Hall sensor is connected with the single chip microcomputer. The magnetic field sensor is provided with a comparator capable of detecting output voltage signals of the Hall sensor, and the potentiometer is used for stabilizing the output signals of the sensor; it can be understood that the Hall sensor and the single-chip microcomputer are combined, automatic detection and analysis of the magnetic field are achieved, and the system has the advantages of being high in precision, stability and practicability and meanwhile is suitable for the fields of college physical experiments, scientific research projects, industrial detection and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the magnetic field test technical field, especially, it relates to portable weak magnetic field testing device based on hall effect. BACKGROUND

[0002] The human body is in gauss weak magnetic field for a long time, can influence the nervous system function, leads to headache, insomnia, fatigue and so on Symptom, can cause irregular heartbeat, blood pressure fluctuation and so on Cardiovascular problem, can weaken the immune function, increase the risk of illness, real -time monitoring weak magnetic field intensity in the environment, can help to assess the health risk of long -term exposure, provide the basis for taking protective measures,

[0003] The existing weak magnetic field detection mode usually adopts the magnetoresistance sensor and the singlechip cooperation, is equipped with multi -channel synchronous data acquisition module and bluetooth module simultaneously, will data transmission to terminal equipment and carries out analysis. Although this kind of mode can realize the basic magnetic field detection, still has the following limitations,

[0004] Detection instrument is in the magnetic field for a long time, can lead to sensor performance drift or damage, influence the accuracy and stability of data, the range of magnetic field sensor is usually narrow, is difficult to cover the extensive range from very weak to strong magnetic field, the resolution and sensitivity of existing sensor are limited, it is difficult to meet the demand of high-precision measurement, especially in very weak magnetic field environment, detection instrument is susceptible to temperature, humidity and other environmental factors, lead to measurement error, the data transmission and processing speed of existing system are limited, it is difficult to realize the real -time monitoring of true meaning,

[0005] To solve the above problems, the portable weak magnetic field testing device based on hall effect is proposed in the application. INVENTION CONTENTS

[0006] The utility model discloses a portable weak magnetic field testing device based on hall effect, solve the problem in the background art.

[0007] To solve the above technical problems, the utility model is realized through the following technical schemes:

[0008] The utility model discloses a portable weak magnetic field testing device based on hall effect, including testing appearance, be equipped with singlechip in the testing appearance, still be equipped with magnetic field sensor in the testing appearance, be equipped with hall sensor based on hall effect on the magnetic field sensor, be equipped with the comparator of the voltage signal of hall sensor output that can detect on the magnetic field sensor, potentiometre is used for stabilizing sensor output signal.

[0009] Further, the magnetic field sensor is based on hall effect, and can convert the magnetic field into a voltage signal.

[0010] Further, the potentiometer can adjust the sensitivity and zero point of the circuit.

[0011] Further, the single-chip microcomputer comprises:

[0012] A reset circuit is arranged to restore the single-chip microcomputer to an initial state and clear previous operation data.

[0013] A crystal oscillator circuit is arranged to provide a stable clock signal for the single-chip microcomputer by using the oscillation characteristics of a quartz crystal.

[0014] A download circuit is arranged to burn a prepared program into the single-chip microcomputer.

[0015] The STC89C52RC chip integrates a central processing unit (CPU), a memory and an input / output (I / O) interface.

[0016] Further, the single-chip microcomputer further comprises a display circuit configured to display the detected magnetic field strength and voltage value on a screen in real time.

[0017] Further, the magnetic field sensor and the single-chip microcomputer are connected through a level interface and perform signal connection and communication.

[0018] The utility model has the advantages of the following beneficial effects:

[0019] The utility model adopts the hall sensor and the analog detection circuit, ensures the high precision and stability of the detection result, realizes the automatic detection and analysis of the magnetic field through the single-chip microcomputer technology, reduces the manual intervention, and improves the detection efficiency.

[0020] The utility model combines the hall sensor, the single-chip microcomputer technology and the traditional physical experiment equipment, expands the function and application range of the experiment equipment, and is simple in system structure, convenient to operate, and suitable for university physical experiments and scientific research projects.

[0021] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0023] Figure 1 It is the whole appearance structure schematic diagram of the utility model;

[0024] Figure 2 It is the magnetic field sensor circuit principle diagram;

[0025] Figure 3 The circuit schematic diagram of the 51 single-chip microcomputer is shown in Figure 1.

[0026] Figure 4 The Hall effect schematic diagram is shown in Figure 2.

[0027] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0028] In the drawings, 1 is a tester, 11 is a magnetic field sensor, 111 is a Hall sensor, 112 is a comparator, 113 is a potentiometer, and 114 is a level interface. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] Please refer to Figure 1 - Figure 4 As shown in Figure 1, the present application is a portable weak magnetic field testing device based on Hall effect, which comprises a tester 1, a single-chip microcomputer 12 is arranged in the tester 1, a magnetic field sensor 11 is also arranged in the tester 1, a Hall sensor 111 based on Hall effect is arranged on the magnetic field sensor 11, a comparator 112 capable of detecting the output voltage signal of the Hall sensor 111 is arranged on the magnetic field sensor 11, and a potentiometer 113 is used to stabilize the sensor output signal. In this embodiment, the magnetic field is detected by the Hall sensor 111 and converted into a voltage signal, and the signal is processed and stabilized by combining the comparator 112 and the potentiometer 113. This design enables the device to accurately detect weak magnetic fields, and stabilizes the output signal through the potentiometer 113, thereby improving the reliability and accuracy of the measurement. The portable design makes it suitable for on-site detection and mobile applications.

[0032] The magnetic field sensor 11 is based on the Hall effect and can convert a magnetic field into a voltage signal. In this embodiment, the magnetic field sensor 11 is based on the Hall effect and can convert a magnetic field into a voltage signal. This conversion method is simple and efficient, suitable for the detection of weak magnetic fields, and provides a foundation for subsequent signal processing.

[0033] The potentiometer 113 can adjust the circuit sensitivity and zero point. In this embodiment, by adjusting the circuit sensitivity and zero point through the potentiometer 113, the device can adapt to the detection requirements of magnetic fields of different intensities and eliminate the zero-point drift problem. This flexibility improves the applicability and measurement accuracy of the device.

[0034] Among them, the microcontroller 12 includes:

[0035] The reset circuit is used to restore the microcontroller to its initial state and clear the previous running data;

[0036] The crystal oscillator circuit utilizes the oscillation characteristics of quartz crystals to provide a stable clock signal for the microcontroller.

[0037] The download circuit is used to burn the written program into the microcontroller;

[0038] The STC89C52RC chip integrates a central processing unit (CPU), memory, and input / output (I / O) interfaces. In this embodiment, the reset circuit, crystal oscillator circuit, download circuit, and STC89C52RC chip ensure the stable operation of the microcontroller and the programmability of the program, while providing powerful data processing capabilities, enabling the device to efficiently process sensor signals and execute complex control logic.

[0039] The microcontroller 12 also includes a display circuit for displaying the detected magnetic field strength and voltage values ​​on the screen in real time. In this embodiment, the microcontroller 12 has an added display circuit, enabling it to display the detected magnetic field strength and voltage values ​​in real time. This real-time feedback function improves the user experience, allowing operators to intuitively obtain measurement results, facilitating on-site analysis and decision-making.

[0040] In this embodiment, the magnetic field sensor 11 and the microcontroller 12 are connected via a level interface 114 for signal transmission and communication. This connection between the magnetic field sensor 11 and the microcontroller 12 via the level interface 114 ensures reliable signal transmission and communication. This design simplifies hardware connections, improves system stability and anti-interference capabilities, and reduces noise impact during signal transmission.

[0041] like Figure 4 The diagram showing the Hall effect principle is as follows: qE H =qv d B; E H =v d B; UH = v d Bb; I = qnv d S = qnv d bd;

[0042] It can be understood that the utility model discloses a Hall sensor and single-chip microcomputer are combined, realize the automation detection and analysis of magnetic field, and the system has the characteristics of high precision, high stability and strong practicality, and is suitable for university physics experiment, scientific research project and industrial detection etc.

[0043] One specific application of the embodiment is that the Hall sensor 111 connected by the magnetic field sensor 11 detects the change of magnetic field, and the Hall sensor can detect the intensity and direction of the magnetic field based on the Hall effect and convert them into voltage signals, which is suitable for the detection of static and low-frequency magnetic field, and has the characteristics of fast response speed and high stability; the comparator 112 is used for detecting the voltage signal output by the Hall sensor and comparing it with the preset threshold value, and has the overvoltage protection function to prevent the subsequent circuit from being damaged by high voltage; the potentiometer 113 is used for adjusting the sensitivity and zero point of the circuit to ensure the accuracy of the sensor output signal; the magnetic field sensor 11 is used for transmitting the output signal of the magnetic field sensor to the tester 1 to realize the connection and communication of the signal.

[0044] The single-chip microcomputer module 12 is the control center of the system, and is responsible for signal processing, data analysis and result display, and its main functions include:

[0045] Reset circuit: used for restoring the single-chip microcomputer to the initial state, clearing the previous running data, and ensuring that the system starts running from zero;

[0046] Crystal oscillator circuit: using the oscillation characteristics of quartz crystal, a stable clock signal is provided for the single-chip microcomputer to ensure the timing accuracy of the system operation;

[0047] Download circuit: used for burning the written program into the single-chip microcomputer to realize the function configuration and update of the system;

[0048] STC89C52RC chip: STC89C52RC is a high-performance single-chip microcomputer chip, which integrates central processing unit CPU, memory, input / output I / O interface and other peripheral functions, has low power consumption, high reliability and rich peripheral resources, and is suitable for the control and data processing of the magnetic field detection system;

[0049] Display circuit: the display circuit is used for displaying the detected magnetic field intensity and voltage value on the screen in real time, which is convenient for users to observe and record;

[0050] Analog detection circuit: used for processing the analog signal output by the Hall sensor, including signal conversion, signal amplification and filtering, connected with the sensor through a TTL level interface to ensure stable transmission of the signal.

[0051] Workflow:

[0052] 1. The Hall sensor detects the change of the magnetic field in the environment and converts it into a voltage signal;

[0053] 2. The comparator detects and overvoltage protects the voltage signal, the potentiometer adjusts the circuit parameters, and the analog detection circuit converts, amplifies and filters the signal;

[0054] 3. The processed signal is transmitted to the single-chip microcomputer through the level interface;

[0055] 4. The single-chip microcomputer analyzes the signal, calculates the magnetic field strength, and outputs the result through the display circuit;

[0056] 5. The single-chip microcomputer controls the operation of the entire system according to the preset program, including data acquisition, processing and display.

[0057] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A portable weak magnetic field testing device based on the Hall effect, comprising a testing instrument (1), wherein the testing instrument (1) is equipped with a microcontroller (12), characterized in that: The tester (1) is also equipped with a magnetic field sensor (11), which is equipped with a Hall sensor (111) based on the Hall effect. The magnetic field sensor (11) is equipped with a comparator (112) that can detect the output voltage signal of the Hall sensor (111), and a potentiometer (113) is used to stabilize the sensor output signal.

2. The portable weak magnetic field testing device based on the Hall effect according to claim 1, characterized in that: The magnetic field sensor (11) is based on the Hall effect and can convert a magnetic field into a voltage signal.

3. The portable weak magnetic field testing device based on the Hall effect according to claim 1, characterized in that: The potentiometer (113) can adjust the circuit sensitivity and zero point.

4. The portable weak magnetic field testing device based on the Hall effect according to claim 1, characterized in that: The microcontroller (12) includes: The reset circuit is used to restore the microcontroller to its initial state and clear the previous running data; The crystal oscillator circuit utilizes the oscillation characteristics of quartz crystals to provide a stable clock signal for the microcontroller. The download circuit is used to burn the written program into the microcontroller; The STC89C52RC chip integrates a central processing unit (CPU), memory, and input / output (I / O) interfaces.

5. The portable weak magnetic field testing device based on the Hall effect according to claim 4, characterized in that: The microcontroller (12) also includes a display circuit for displaying the detected magnetic field strength and voltage value on the screen in real time.

6. The portable weak magnetic field testing device based on the Hall effect according to claim 1, characterized in that: The magnetic field sensor (11) and the microcontroller (12) are connected through a level interface (114) for signal connection and communication.

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