Dual-redundancy proximity switch capable of sensing rotation direction of object

Abstract

The utility model provides a dual-redundancy proximity switch capable of sensing a rotation direction. The dual-redundancy proximity switch comprises a shell, a rear cover, a bolt, a positioning seat and an insulated cable, a circuit module is arranged in the shell and connected with the positioning seat, and output signals of the circuit module are connected through an insulation cable. According to the utility model, the induction mode of targets with different polarities is added on the basis that the conventional proximity switch can only induce a target with a single polarity, the rotation direction of a rotating object can be measured, the switch is additionally provided with two circuit modules, the functions of two proximity switches can be realized, and the amount of proximity switches required for measuring the rotation direction is reduced; the product has a dual-redundancy proximity switch two-way detection function, the problem of false triggering when a dual-redundancy switch senses a target is also avoided, the space needed by the switch when the rotation direction of an object is measured is reduced, and the purpose of detecting the rotation direction is achieved with smaller size and reliability.

Description

Technical Field

[0001] This utility model relates to a dual-redundant proximity switch capable of sensing the rotation direction of an object, belonging to the field of electrical automation technology. Background Technology

[0002] Proximity switches are contactless switches, meaning they can be controlled without direct contact with the object being detected. They can be used in industrial control systems to provide position signal feedback from actuators. They offer significant advantages such as reliable operation, stable performance, high repeatability, no mechanical wear, long service life, no sparks, no noise, strong anti-interference capabilities, and strong environmental adaptability. Proximity switches utilize principles such as the Hall effect and eddy current effect to convert physical signals into electrical signals, thereby triggering the switch output signal to achieve functions such as position detection, limit control, and metering control.

[0003] Traditional proximity switches, due to their design, can only sense a single target. When detecting the rotation direction of an object, at least two switches are required, and there are specific requirements for the spacing between the switches and the target, resulting in a larger footprint and limiting the product's design. Chinese utility model patent CN112096192B discloses a protective locking switch with three concurrent approach directions, equipped with multiple polarity-reversed coils to adapt to multiple approach directions of the corresponding locking tongue without rotating the head, body, or the entire switch. However, the polarity-reversed coils of this switch do not solve the problem proposed in this solution. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a dual-redundant proximity switch that can sense the rotation direction of an object. The dual-redundant proximity switch has two different circuits designed inside, so as to achieve the purpose of measuring the rotation direction of an object using a single product.

[0005] This utility model is achieved through the following technical solution.

[0006] This utility model provides a dual-redundant proximity switch capable of sensing the direction of rotation. The dual-redundant proximity switch capable of sensing the direction of rotation of an object includes a housing and two circuit modules arranged in parallel within the housing. One end of each circuit module is connected to a positioning base, and the other end is connected to an insulated cable. The two circuit modules have different sensing polarities.

[0007] Preferably, the two circuit modules are each equipped with Hall elements of different polarities.

[0008] Preferably, the outer surface of the circuit module is coated with PCB protective adhesive, the circuit module is encapsulated in the shell, and polyurethane resin is poured into the shell to fix the two together.

[0009] Preferably, one end face of the positioning seat is fitted to the inner surface of the outer shell, and a vertical groove is formed on the other end face.

[0010] Preferably, the circuit module is inserted into the vertical groove of the positioning seat and the connection is coated with epoxy resin adhesive for fixation.

[0011] Preferably, the upper end cover of the outer casing is secured to the cover plate by bolts.

[0012] Preferably, the insulated cable is connected to the output signal terminal of the circuit module and extends outside the housing.

[0013] The beneficial effects of this utility model are as follows: In the past, two proximity switches were required to measure the rotation direction when using proximity switches. This utility model achieves the measurement of the rotation direction by using two circuit modules with different polarities and different turn-on times, thus enabling a single proximity switch to measure the rotation direction. At the same time, it solves the problem of false triggering when dual-redundant proximity switches sense targets, greatly reducing the space occupied by the switch, providing more leeway for the size design of the product, and improving space utilization. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A sectional view;

[0017] In the diagram: 1-outer shell, 2-circuit module, 3-positioning seat, 4-insulated cable, 5-bolt, 6-cover plate. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0019] like Figure 1As shown, a proximity switch with adjustable operating distance includes a housing 1, a circuit module 2, a positioning seat 3, an insulated cable 4, bolts 5, and a cover plate 6. The circuit module 2 is housed inside the housing 1. The circuit module 2 is fixed by the positioning seat 3 and its output signal is connected through the insulated cable 4. The cover plate 6 is fixed and seals the housing by the bolts 5.

[0020] Circuit module 2 is designed with sensing circuits of different polarities. Inside the housing 1 are two circuit modules 2 that sense different polarities. Circuit module 2 is coated with PCB protective adhesive and fixed to the positioning base 3 with epoxy resin. The housing 1 is filled with polyurethane resin, and the cover plate 6 is used to seal the circuit module 2 inside the housing 1 with bolts 5.

[0021] This switch adds two circuit modules, which are arranged side by side. Two Hall elements with different polarities are placed in the two circuit modules, which can realize the function of two proximity switches, reducing the number of proximity switches required when measuring the direction of rotation.

[0022] Meanwhile, the internal design of the switch incorporates circuit modules that sense different polarities. During use, only two permanent magnets of different polarities need to be fixed to the surface of the object being sensed. This gives the product the function of dual-redundant proximity switch for dual-path detection, reducing the space required for the switch to measure the rotation direction of the object. This achieves the purpose of detecting the rotation direction with a smaller size and higher reliability.

[0023] For example, to detect the rotation direction of a certain device, two permanent magnets of different polarities are placed on the device. Then, the proximity switch of this invention is used to detect it. When the N-pole circuit of this invention senses the approach of the permanent magnet first and outputs a signal, and then the S-pole circuit senses the approach of the permanent magnet and outputs a signal, it can be known that the rotation direction is from the N-pole position to the S-pole position on the device; otherwise, it is from the S-pole position to the N-pole position.

[0024] The foregoing has provided a detailed description of the dual-redundant proximity switch capable of sensing the rotation direction of an object, as provided by this utility model. Specific examples have been used to illustrate the structure and working principle of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A dual-redundant proximity switch capable of sensing the rotation direction of an object, characterized in that: It includes a housing (1) and two circuit modules (2) arranged in parallel inside the housing (1). One end of the circuit module (2) is connected to the positioning seat (3), and the other end is connected to the insulated cable (4). The two circuit modules (2) set inside the outer casing (1) have different sensing polarities.

2. The dual-redundant proximity switch capable of sensing the rotation direction of an object as described in claim 1, characterized in that: The two circuit modules (2) are respectively equipped with Hall elements of different polarities.

3. The dual-redundant proximity switch capable of sensing the rotation direction of an object as described in claim 1, characterized in that: The outer surface of the circuit module (2) is coated with PCB protective glue. The circuit module (2) is encapsulated in the shell (1). The shell (1) is filled with polyurethane resin glue to fix the two.

4. The dual-redundant proximity switch capable of sensing the rotation direction of an object as described in claim 1, characterized in that: One end face of the positioning seat (3) is fitted to the inner surface of the outer shell (1), and a vertical groove is provided on the other end face.

5. The dual-redundant proximity switch capable of sensing the rotation direction of an object as described in claim 4, characterized in that: The circuit module (2) is inserted into the vertical groove of the positioning seat (3) and the connection is coated with epoxy resin for fixation.

6. The dual-redundant proximity switch capable of sensing the rotation direction of an object as described in claim 1, characterized in that: The upper end cover of the outer shell (1) is fastened to the cover plate (6) by bolts (5).

7. The dual-redundant proximity switch capable of sensing the rotation direction of an object as described in claim 1, characterized in that: The insulated cable (4) is connected to the output signal terminal of the circuit module (2) and extends out of the outer casing (1).

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