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

Abstract

The invention 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 invention, an induction mode of targets with different polarities is added on the basis that a 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] The invention relates to a dual-redundancy proximity switch capable of sensing the rotation direction of an object, belonging to the technical field of electrical automation. Background Art

[0002] Proximity switches are contactless switches, i.e. position switches that can be controlled without direct contact with the detected object. They can be used in industrial control mechanisms to perform position signal feedback of components. They have outstanding advantages such as reliable operation, stable performance, high repeat positioning accuracy, no mechanical wear, long service life, no sparks, no noise, strong anti-interference ability, and strong environmental adaptability. Proximity switches are the application of principles such as the Hall effect and eddy current effect. They convert physical signals into electrical signals, thereby triggering the switch output signal to achieve the functions of detecting position, limit control, and metering control.

[0003] Traditional proximity switches can only sense a single target due to their inherent design. At least two switches are required to detect the rotation direction of an object, and there are certain requirements for the installation spacing of the switches and the installation spacing of the targets, resulting in the need to occupy a larger space when in use, which limits the product appearance design. The Chinese invention patent with publication number CN112096192B discloses a protective locking switch with three coexisting approach directions, which is equipped with multiple polarity-reversed coils to adapt to the corresponding multiple approach directions of the locking tongue without rotating the head, the body or the entire switch. The polarity-reversed coil of the switch cannot solve the problem raised by this solution. Summary of the invention

[0004] To solve the above technical problems, the present invention provides a dual-redundancy proximity switch capable of sensing the rotation direction of an object. The dual-redundancy proximity switch capable of sensing the rotation direction of an object has two different circuits designed inside the proximity switch, thereby achieving the purpose of measuring the rotation direction of an object with one product.

[0005] The present invention is achieved through the following technical solutions.

[0006] The invention provides a dual-redundancy proximity switch capable of sensing the rotation direction. The dual-redundancy proximity switch capable of sensing the rotation direction of an object comprises a shell and two circuit modules arranged in parallel in the shell, one end of the circuit module is connected to a positioning seat, and the other end is connected to an insulating cable; the induction polarities of the two circuit modules are different.

[0007] Preferably, Hall elements with different polarities are respectively arranged in the two circuit modules.

[0008] Preferably, the outer surfaces of the circuit modules are coated with PCB protective glue, the circuit modules are potted in the shell, and polyurethane resin glue is poured in the shell to fix the two.

[0009] Preferably, one end surface of the positioning seat is arranged in contact with the inner surface of the shell, and the other end surface is provided with a vertical groove.

[0010] Preferably, the circuit module is inserted into the vertical groove of the positioning seat and is fixed by coating epoxy resin glue at the connection.

[0011] Preferably, the upper end surface cover of the shell is fastened with a cover plate by bolts.

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

[0013] The beneficial effect of the present invention is that in the past, two proximity switches were required to cooperate when measuring the rotation direction. The present invention uses two circuit modules that sense different polarities and have different connection times to achieve the measurement of the rotation direction with a single proximity switch, while solving the problem of false triggering when the dual-redundancy proximity switch senses the target, greatly reducing the space occupied by the switch, providing more margin for the volume design of the matching product, and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 A cross-sectional view of

[0017] In the figure: 1-housing, 2-back cover, 3-bolts, 4-circuit module, 5-positioning seat, 6-insulated cable. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0019] like Figure 1As shown, a proximity switch with an externally adjustable action distance includes a housing 1, a circuit module 2, a positioning seat 3, an insulating cable 4, bolts 5, a cover plate 6, and a circuit module 2 is arranged in the housing 1, the circuit module 2 is fixed by the positioning seat 3 and the output signal of the circuit module 2 is connected through the insulating cable 4, and the cover plate 6 is fixed to the sealed housing by the bolts 5.

[0020] Different polarity sensing circuits are designed on the circuit module 2. Two circuit modules 2 for sensing different polarities are arranged inside the housing 1. The circuit module 2 is coated with PCB protective glue and fixed to the positioning seat 3 by epoxy resin glue. Polyurethane resin glue is filled in the housing 1, and the cover plate 6 seals the circuit module 2 in the housing 1 by bolts 5.

[0021] The switch adds two circuit modules, which are arranged side by side. Two Hall elements sensing different polarities are placed in the two circuit modules, which can realize two proximity switch functions and reduce the number of proximity switches required for measuring the rotation direction.

[0022] At the same time, the switch is designed to be a circuit module that senses different polarities. When in use, only two permanent magnets of different polarities need to be fixed on the surface of the sensing object, so that the product has the function of dual-redundancy proximity switch for two-way detection, reducing the space required for the switch when measuring the rotation direction of the object, and achieving the purpose of detecting the rotation direction with a smaller volume and reliability.

[0023] For example, to detect the rotation direction of a certain device, two permanent magnets with different polarities are placed in the device, and then the proximity switch of the present invention is used to detect it. When the N-pole circuit of the present invention first senses the approach of the permanent magnet 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 magnet position set on the certain device to the S-pole position; otherwise, it is from the S-pole position to the N-pole position.

[0024] The above is a detailed introduction to the dual-redundancy proximity switch that can sense the rotation direction of an object provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A dual-redundancy proximity switch capable of sensing the rotation direction of an object, characterized in that: It comprises a housing (1) and two circuit modules (2) arranged in parallel in the housing (1); one end of the circuit module (2) is connected to a positioning seat (3), and the other end is connected to an insulating cable (4); The two circuit templates (2) have different induction polarities.

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

3. The proximity switch with externally adjustable operating distance as claimed 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 embedded in the outer shell (1), and polyurethane resin glue is poured into the outer shell (1) to fix the two.

4. The proximity switch with externally adjustable operating distance according to claim 1, characterized in that: One end surface of the positioning seat (3) is arranged in contact with the inner surface of the outer shell (1), and the other end surface is provided with a vertical groove.

5. The proximity switch with externally adjustable operating distance as claimed in claim 4, characterized in that: The circuit module (2) is inserted into the vertical groove of the positioning seat (3) and is fixed at the connection point by coating with epoxy resin glue.

6. The proximity switch with externally adjustable operating distance as claimed in claim 1, characterized in that: The upper end surface cover of the housing (1) is fastened with a cover plate (6) via bolts (5).

7. The proximity switch with externally adjustable operating distance as claimed in claim 1, characterized in that: The insulated cable (4) is connected to the output signal end of the circuit module (2) and extends out of the housing (1).

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