Proximity switch sensor

Abstract

The utility model discloses a proximity switch sensor, comprising a probe assembly which comprises an induction housing, a probe body and a connecting block; the center of the upper surface of the induction shell is fixedly connected with a probe body, and one side of the induction shell is fixedly connected with a connecting block; a target is installed on the upper surface of the probe body, four interfaces and through holes formed in the two side walls of the upper surface of the target are formed in the upper surface of the target, a set of connecting screw holes are formed in the two ends of one side wall of the connecting block, a cable locking nut is installed in the middle of one side of the connecting block, and the internal structure of the cable comprises a conductor, an insulating layer, a shielding layer and a sheath. The utility model solves the problems that the accuracy of monitoring data is reduced due to the influence of environmental factors, equipment faults or technical restrictions on some existing detection devices in the air, the state of the air transport lock is misreported or missed to report, and reliable real-time monitoring results cannot be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of proximity switch sensors, in particular to a proximity switch sensor. Background Art

[0002] An air cargo lock is a safety device used to ensure the safe transportation of goods during air transport. It is usually a special lock that needs to be detected in real time to see if it is closed.

[0003] However, it still has the following disadvantages in actual use:

[0004] Because some existing detection devices are at high altitudes, they will be affected by environmental factors, equipment failures or technical limitations, resulting in reduced accuracy of monitoring data, which will lead to false or missed reports of the status of the air transport lock and fail to provide reliable real-time monitoring results.

[0005] Therefore, a new proximity switch sensor is proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a proximity switch sensor to solve the problem raised in the above background technology that some existing detection devices may be affected by environmental factors, equipment failures or technical limitations at high altitudes, resulting in reduced accuracy of monitoring data, which may lead to false alarms or omissions in the status of air transport locks and the inability to provide reliable real-time monitoring results.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model is a proximity switch sensor, comprising:

[0009] A probe assembly, the probe assembly comprising a sensing housing, a probe body, and a connecting block;

[0010] The center of the upper surface of the sensing shell is fixedly connected with a probe body, and one side of the sensing shell is fixedly connected with a connecting block;

[0011] A target is installed on the upper surface of the probe body, and four interfaces are opened on the upper surface of the target, and through holes are opened on the two side walls of the upper surface of the target.

[0012] Furthermore, the target is square and has a length of 18±0.2 mm, and the axial distance between the probe body and the target is 2.5 mm±1 mm.

[0013] Furthermore, the probe assembly also includes a connecting screw hole and a locking wire nut.

[0014] Furthermore, the detection distance of the target approaching the sensor probe body in the radial direction is 2 mm±1 mm.

[0015] Furthermore, it also includes a cable;

[0016] The internal structure of the cable includes a conductor, an insulating layer, a shielding layer, and a sheath;

[0017] The conductor is made of tinned copper, nickel-plated copper or nickel-plated copper alloy, and the sheath and the insulating layer are made of white cross-linked modified ethylene-tetrafluoroethylene copolymer.

[0018] Furthermore, the probe assembly contains a power supply circuit, a sensing circuit, and a switch conversion circuit, and the cable is connected inside the locking wire nut and is connected to the internal circuit of the probe body.

[0019] Furthermore, the target is a permanent magnet, and the shielding layer is a braided shield made of aluminum wire.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. The utility model, through the set probe assembly, target, interface, through hole, cable, the probe assembly detects the change of external magnetic field strength caused by the movement of the target, so as to realize the detection of position. When the target approaches the probe assembly, the induction circuit detects that the magnetic field strength is enhanced, and outputs a low level after circuit processing, and then the switch conversion circuit converts and outputs a high level signal; conversely, when the target is away from the probe assembly, the induction circuit detects that the magnetic field strength is weakened, and outputs a high level after circuit processing, and then the switch conversion circuit converts and outputs a low level signal. The 3A proximity switch sensor assembly is used to detect the relative position of the air transport lock driving slider, and feeds back the approach / leave signal, and then judges the locked / unlocked state of the air transport lock, so as to detect the state of the air transport lock in real time.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the probe assembly of the utility model;

[0025] Figure 2 Schematic diagram of the target of the utility model

[0026] Figure 3 This is the cable structure diagram of the utility model;

[0027] Figure 4 This is a structural diagram of the relationship between the proximity switch components of the utility model;

[0028] Figure 5 This is a reliability block diagram of the proximity sensor of the utility model.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 11. Induction housing; 12. Probe body 3. Connection block; 14. Connection screw hole; 15. Locking wire nut;

[0031] 21. target; 22. interface; 23. through hole;

[0032] 3. Cable; 31. Conductor; 32. Insulation layer; 33. Shielding layer; 34. Sheath. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0036] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] See also Figure 1-Figure 3 As shown, this embodiment is a proximity switch sensor, comprising:

[0038] The probe assembly includes a sensing housing 11, a probe body 12, and a connecting block 13;

[0039] A probe body 12 is fixedly connected to the center of the upper surface of the sensing housing 11, and a connecting block 13 is fixedly connected to one side of the sensing housing 11;

[0040] A target 21 is mounted on the upper surface of the probe body 12. Four interfaces 22 are provided on the upper surface of the target 21, and through holes 23 are provided on the two side walls of the upper surface of the target 21.

[0041] The function of the probe assembly is to sense the change in magnetic field intensity caused by the movement of the target 21, convert it into a change in voltage, and then output high and low level signals after comparison, amplification, shaping, switch conversion, etc.;

[0042] The function of the target 21 is to generate a fixed magnetic field and change the output signal of the probe assembly by approaching or moving away from the probe assembly;

[0043] The probe assembly also includes a connecting screw hole 14 and a locking wire nut 15;

[0044] A set of connecting screw holes 14 are provided at both ends of one side wall of the connecting block 13, and a locking wire nut 15 is installed in the middle of one side of the connecting block 13;

[0045] The electrical connector is grounded and fireproofed by spraying paint on the surface of the electrical connector;

[0046] The sensor probe assembly housing is designed as a hollow cylindrical structure with one end closed, and the surface is treated with anti-corrosion;

[0047] The internal circuit board of the sensor probe assembly is brushed with three-proof protective agent and potted with silicone rubber and silicone glue;

[0048] The opening end of the sensor probe assembly housing is sealed with epoxy glue after the cable 3 is thrown out;

[0049] Target 21 is a purely mechanical component, which is fixed in the moving part of the mechanism by epoxy glue and cover seal;

[0050] Working principle:

[0051] The probe assembly detects the change in the external magnetic field intensity caused by the movement of the target 21 to detect the position.

[0052] When the target 21 approaches the probe assembly, the induction circuit detects the increase in magnetic field strength, and after circuit processing, it outputs a low level signal, which is then converted by the switch conversion circuit to output a high level signal;

[0053] On the contrary, when the target 21 is away from the probe assembly, the induction circuit detects that the magnetic field strength is weakened, and after being processed by the circuit, a high level signal is output, which is converted by the switch conversion circuit to output a low level signal.

[0054] The 3A proximity switch sensor assembly is used to detect the relative position of the air transport lock drive slider and feedback the approach / leave signal to determine the locked / unlocked state of the air transport lock.

[0055] The device can detect the status of the air transport lock in real time and improve the safety of air transport.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A proximity switch sensor, characterized in that: include: A probe assembly, the probe assembly comprising a sensing housing (11), a probe body (12), and a connecting block (13); A probe body (12) is fixedly connected to the center of the upper surface of the sensing housing (11), and a connecting block (13) is fixedly connected to one side of the sensing housing (11); A target (21) is installed on the upper surface of the probe body (12), and four interfaces (22) are provided on the upper surface of the target (21), and through holes (23) are provided on the two side walls of the upper surface of the target (21).

2. A proximity switch sensor according to claim 1, characterized in that: The target (21) is square and has a length of 18±0.2 mm, and the axial distance between the probe body (12) and the target (21) is 2.5 mm±1 mm.

3. A proximity switch sensor according to claim 1, characterized in that: The probe assembly also includes a connecting screw hole (14) and a locking wire nut (15); A group of connecting screw holes (14) are provided at both ends of one side wall of the connecting block (13), and a locking wire nut (15) is installed in the middle of one side of the connecting block (13).

4. A proximity switch sensor according to claim 1, characterized in that: The detection distance of the target (21) approaching the sensor probe body (12) in the radial direction is 2 mm±1 mm.

5. The proximity switch sensor according to claim 1, characterized in that: Also includes a cable (3); The internal structure of the cable (3) comprises a conductor (31), an insulating layer (32), a shielding layer (33), and a sheath (34); The conductor (31) is made of tinned copper, nickel-plated copper, or nickel-plated copper alloy, and the sheath (34) and the insulating layer (32) are made of white cross-linked modified ethylene-tetrafluoroethylene copolymer.

6. A proximity switch sensor according to claim 1, characterized in that: The probe assembly contains a power supply circuit, an induction circuit, and a switch conversion circuit, and the cable (3) is connected inside the locking wire nut (15) and is connected to the internal circuit of the probe body (12).

7. A proximity switch sensor according to claim 6, characterized in that: The target (21) is a permanent magnet, and the shielding layer (33) is a braided shield made of aluminum wire.

Images