Proximity switch based on Hall component design

Abstract

The utility model discloses a special proximity switch based on Hall component design. The special proximity switch comprises a proximity switch assembly and a circuit. The proximity switch assembly comprises a proximity switch rotor and a proximity switch stator; the circuit comprises a power input circuit, a signal detection circuit, a switch circuit and indicator light circuits, the signal detection circuit outputs high-low level signals after signals pass through the switch circuit, the indicator light circuits are connected in parallel and indicate the switch output state, and the power input circuit is used for supplying power to the signal detection circuit. The utility model provides a proximity switch based on the design of a Hall component, which realizes the detection and control of an approaching object through the induction of the Hall component to a magnetic field. Compared with a traditional proximity switch, the non-contact type principle is adopted in the design, abrasion and faults caused by mechanical contact are avoided, and stability and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to instruments and meters and automation technology, and in particular to a proximity switch designed based on Hall elements. Background Art

[0002] A proximity switch is a sensor device that detects the proximity or distance of an object and is widely used in industrial automation and production lines. It typically uses technologies such as magnetic fields, infrared, ultrasonic waves, or lasers to detect the presence or location of an object.

[0003] In China, with the continuous improvement of industrial automation levels, proximity switches are increasingly used on production lines. They are used to detect the arrival of materials, control conveyor speeds, position robotic arms, and monitor safety doors. In China's manufacturing industry, proximity switches have become a vital tool for improving production efficiency and quality.

[0004] Proximity switches are also widely used in industrial sectors abroad, particularly in developed countries. The concept of Industry 4.0 is driving the development of factory automation and intelligent manufacturing, making proximity switches increasingly important in production lines. At the same time, industrial companies abroad are constantly developing new proximity switch technologies to meet increasingly complex production needs.

[0005] Traditional switches primarily utilize mechanical contact designs, which can be susceptible to damage, have short lifespans, and experience high maintenance costs. With the continuous advancement of technology, contactless switches are gaining popularity. However, in some specialized environments, the stability and accuracy of traditional contactless magnetic induction switches still need to be improved. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a proximity switch and a control system thereof designed based on a Hall element.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A proximity switch designed based on a Hall element comprises a proximity switch component and a circuit; the proximity switch component comprises a proximity switch mover and a proximity switch stator;

[0009] The circuit includes a power input circuit, a signal detection circuit, a switch circuit and an indicator light circuit. The signal detection circuit outputs a high and low level signal after passing through the switch circuit. The indicator light circuit is connected in parallel and indicates the switch output status. The power input circuit is used to supply power to the signal detection circuit.

[0010] Preferably, the proximity switch mover includes a built-in magnet and a protective shell fixedly mounted on the built-in magnet, and the protective shell includes an open magnet mounting seat and a magnet cover plate matched thereon.

[0011] Preferably, the built-in magnet is a neodymium iron boron magnet.

[0012] Preferably, the proximity switch stator includes a built-in high-sensitivity sensor and a shell fixedly mounted on the built-in high-sensitivity sensor. The built-in high-sensitivity sensor is fixedly connected to a cable, and the cable runs through the shell.

[0013] Preferably, the magnet cover is fixed to the magnet mounting seat by a clamping member, and the shell structure is the same as the protective shell structure.

[0014] A control system includes a speed measuring device and a proximity switch designed based on a Hall element as described above; the speed measuring device is connected to the proximity switch and performs speed detection based on a high-level signal or a low-level signal fed back by the proximity switch.

[0015] Compared with the existing technology, the beneficial effects of the present invention are: providing an innovative proximity switch based on Hall element design, adopting a non-contact design, avoiding mechanical wear, and improving stability and life; the high sensitivity and precision of the Hall element realize accurate proximity control; simple structure, easy installation and maintenance, and reduced cost.

[0016] The proximity switch designed based on Hall effect components can be widely used in industrial automation, smart home, automotive electronics and other fields. It can be used for object proximity detection, position control, safety protection and other aspects, and has good market prospects and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0019] Figure 3 A circuit diagram of the power input of the utility model;

[0020] Figure 4 A circuit diagram for signal detection of the present utility model;

[0021] Figure 5 This is a circuit diagram of the PNP output of the utility model;

[0022] Figure 6 This is a circuit diagram of the indicator light circuit of the utility model.

[0023] In the picture:

[0024] 1 proximity switch mover, 2 proximity switch stator, 11 built-in magnet, 12 magnet mounting seat, 13 magnet cover, 21 built-in high-sensitivity sensor, 22 housing, 23 cable. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figure 1-6 A proximity switch based on a Hall element design is shown, comprising: a proximity switch assembly and a circuit; the proximity switch assembly comprises a proximity switch mover 1 and a proximity switch stator 2, wherein the proximity switch mover 1 comprises a built-in magnet 11 and a protective shell fixedly mounted on the built-in magnet 11, the built-in magnet 1 is a neodymium iron boron magnet, the protective shell comprises an open magnet mounting seat 12 and a magnet cover 13 matched thereon, the proximity switch mover 1 is removable, in some embodiments, the proximity switch stator 2 comprises a built-in high-sensitivity sensor 21 and a shell 22 fixedly mounted on the built-in high-sensitivity sensor 21, the built-in high-sensitivity sensor 21 is fixedly connected to a cable 23, the cable 23 is arranged through the shell 22, the magnet cover 13 is fixed to the magnet mounting seat 12 by a clamping member, the shell 22 has the same structure as the protective shell, and the proximity switch stator 2 is also removable;

[0027] The length of the cable 23 can be customized. At the same time, in order to ensure applicability, the cable 23 is provided with a section in a snake-like curled shape, which can be stretched for use and avoids the situation where it hangs down too long and takes up space.

[0028] The circuit includes a power input circuit, a signal detection circuit, a switch circuit and an indicator light circuit. The power input circuit uses a 78L05 voltage regulator to convert a 24V input voltage into a 5V voltage, thereby powering the Hall element. The signal detection circuit is composed of multiple proximity switch components, specifically five proximity switches. The number of switches can be changed without affecting the implementation of the present invention. When the number of proximity switches changes, the accuracy and reliability of the power supply circuit and the signal detection circuit are positively correlated with the number of proximity switches. When sensing an external magnetic field, a 3.6V signal is output, otherwise a 0V signal is output. The signal detection circuit outputs a high and low level signal after passing through the switch circuit. The switch circuit adopts a PNP output circuit. In this embodiment, the switch circuit is composed of two transistors. The Hall element outputs high and low voltages when subjected to an external magnetic field, changing the voltage difference between the base and emitter of the transistor to output high and low level signals. The indicator light circuit is connected in parallel and indicates the switch output state. The high level output indicator light is on, and the low level output indicator light is off. The power input circuit is used to supply power to the signal detection circuit.

[0029] It also includes a control system, including a speed measuring device and the above-mentioned proximity switch designed based on the Hall element; the speed measuring device is connected to the proximity switch, and performs speed detection according to the high-level signal or low-level signal fed back by the proximity switch, and can coordinately detect the speed of the object. The speed measuring device receives high and low-level signals, and the frequency of these pulse signals is proportional to the rotational speed. By calculating the number of pulses received per unit time, the speed information can be obtained.

[0030] In practice, proximity switches can be embedded in control systems based on specific application scenarios or customer sites. For example, in an automotive production line, it is necessary to detect the location and quantity of parts. By connecting the output signal of a Hall effect device-based proximity switch to the PLC of the production line control system, the presence and location of parts can be determined by reading the high and low level pulse signals. Those skilled in the art will appreciate that the aforementioned application in automated control of automotive production lines is merely an aid to understanding the present invention and should not be construed as a specific limitation of the present invention.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A proximity switch designed based on Hall element, characterized in that: The invention comprises a proximity switch assembly and a circuit; the proximity switch assembly comprises a proximity switch mover (1) and a proximity switch stator (2); the proximity switch mover (1) comprises a built-in magnet (11) and a protective shell fixedly mounted on the built-in magnet (11); the protective shell comprises an open magnet mounting seat (12) and a magnet cover (13) matched thereon; the proximity switch stator (2) comprises a built-in high-sensitivity sensor (21) and a shell (22) fixedly mounted on the built-in high-sensitivity sensor (21); the built-in high-sensitivity sensor (21) is fixedly connected to a cable (23); the cable (23) is arranged to pass through the shell (22); The circuit includes a power input circuit, a signal detection circuit, a PNP output circuit and an indicator light circuit. The signal detection circuit is composed of five proximity switch components. The output signal of the signal detection circuit outputs a high and low level signal after passing through the PNP output circuit. The indicator light circuit is connected in parallel and indicates the switch output status. The power input circuit is used to supply power to the signal detection circuit.

2. The proximity switch based on Hall element design according to claim 1, characterized in that: The built-in magnet (11) is a neodymium iron boron magnet.

3. The proximity switch based on Hall element design according to claim 1, characterized in that: The magnet cover plate (13) is fixed to the magnet mounting seat (12) via a clamping member, and the shell (22) has the same structure as the protective shell.

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