KR101272010B1 - Measuring Sensor for Fine Displacement - Google Patents

Abstract

The present invention relates to a micro displacement sensor, by using a magnet unit for generating a magnetic field and a sensing sensor unit for detecting a change in the magnetic field to be able to measure the micro-relative displacement relative to the two objects moving relative to each other in a non-contact manner It is easy to manufacture with simple structure and low cost, and can be widely applied to vehicles and various machines, and it is possible to elastically return to the correct position by connecting the magnet unit and the sensing sensor unit which move relative to each other with separate clip joints. It provides a micro displacement sensor that can accurately measure micro displacements.

Description

Measuring Sensor for Fine Displacement

The present invention relates to a micro displacement sensor. More specifically, by using a magnet unit that generates a magnetic field and a sensing sensor unit that detects a magnetic field change, it is possible to measure the minute relative displacement of the two moving objects relative to each other in a non-contact manner, thereby providing a simple structure and low cost. It can be easily manufactured and widely applied to vehicles and various machines, and the magnet unit and the sensing sensor unit that move relative to each other are connected by separate clip joints so that they can be elastically returned to the correct position. It relates to possible micro displacement measurement sensors.

Various functions are added to vehicles such as automobiles to provide a more stable and comfortable running state beyond the function of a moving means. Various functions including an engine as a core driving element of the vehicle and an electronic control for the transmission Elements have become electronic or electronicization is underway. In particular, in recent years, brake devices have also been rapidly switched to electronic control systems.

Electro-mechanical brakes are devices that generate a braking force using an electric motor, and require complicated control methods as compared to hydraulic brakes that determine the amount of braking by adjusting the hydraulic pressure. In order to precisely control the control, it is necessary to accurately measure the amount of braking force transmitted to the electronic brake during the operation of the electronic brake, and the electronic brake is controlled based on this.

At this time, the method of measuring the braking force transmitted to the electronic brake is generally used to measure the movement displacement of the caliper body moving to transmit the braking force through a separate actuator. The displacement of the caliper body is not only very small in size but also needs to be able to measure very fine movement displacement for more accurate measurement. Therefore, in order to measure the micro displacement of the caliper body, a micro displacement sensor is generally mounted on the brake caliper, and such a micro displacement sensor is usually used with an expensive strain gauge.

On the other hand, the sensor for measuring the small displacement is widely used in precision measurement devices or various industrial machines in addition to the electronic brake device for vehicles, in general, expensive strain gauges are used to increase the manufacturing cost of the vehicle or various machines and control method thereof There was also a problem such as complexity.

The present invention has been invented to solve the problems of the prior art, and an object of the present invention is to use a fine unit for two objects that move relative to each other in a non-contact manner by using a magnet unit that generates a magnetic field and a sensing sensor unit that detects a magnetic field change. By allowing relative displacement measurements to be measured, it is possible to provide a micro displacement measurement sensor that can be easily manufactured with a simple structure and low cost and is widely applicable to vehicles and various machines.

Another object of the present invention is to provide a micro displacement measurement sensor that can measure the micro displacement more accurately by connecting the magnet unit and the sensing sensor unit moving relative to each other by a separate clip joint to elastically return to the correct position.

Still another object of the present invention is to provide a micro displacement measurement sensor that can reduce the defective rate of the assembly operation process by adopting a structure that can improve the assemblability with a simple structure and prevent misassembly.

The present invention provides a micro displacement measurement sensor for a vehicle mounted to a brake caliper for measuring a braking force transmitted to an electronic brake, comprising: a magnet unit coupled to move integrally with a caliper body and generating a magnetic field; And a sensing sensor unit disposed to be spaced apart from the magnet unit, the sensing sensor unit being disposed to be movable relative to the magnet unit so as to sense a magnetic field change due to the movement of the magnet unit, and the magnet unit through the sensing sensor unit. It provides a micro displacement sensor for a vehicle, characterized in that for detecting the relative displacement of the displacement.

In this case, the magnet unit and the sensing sensor unit may be connected through a separate clip joint, and may be configured to return to the reference position of the initial state by the elastic force of the clip joint in the process of returning to the original state after relative movement.

In addition, the clip joint may include an elastic deformation unit that elastically deforms according to a relative movement of the magnet unit and the detection sensor unit; And first and second coupling parts formed at both ends of the elastic deformation part and coupled to the magnet unit and the sensing sensor unit, respectively, and the elastic deformation part may be formed in a bent shape.

The elastic deformation unit may include an operation unit formed to extend in one direction so that elastic deformation occurs according to relative movement of the magnet unit and the detection sensor unit; And it may be configured to include a support portion each extending to be bent in a direction perpendicular to both ends of the operating portion.

On the other hand, the magnet unit is a magnet case having an insertion groove formed on one side; And a magnet inserted into the insertion groove of the magnet case, and the magnet may be a single pole magnet or a multipole magnet.

In addition, an insertion groove of the magnet case and a corner portion of the magnet may have a chamfering portion corresponding to each other so that the magnet can be inserted into the insertion groove in a specific arrangement direction.

In addition, a separate cover block for closing the insertion groove is coupled to the magnet case to prevent the magnet from being separated from the insertion groove of the magnet case, and a chamfering protrusion is formed on one surface of the cover block facing the insertion groove. The magnet may include a chamfering portion corresponding to the chamfering protrusion so that the magnet is inserted into the insertion groove in a specific arrangement direction.

On the other hand, the sensing sensor unit comprises a sensor housing; A PCB substrate mounted inside the sensor housing; And a hall sensor mounted on the PCB substrate to detect a magnetic field change of the magnet unit.

On the other hand, the present invention is a micro-displacement measurement sensor for measuring the relative displacement displacement relative to each other with respect to the first and the second object capable of relative movement, a magnet unit coupled to move integrally with the first object; And a sensing sensor unit coupled to move integrally with the second object and spaced apart from the magnet unit, wherein a magnetic field change of the magnet unit occurs in response to a relative movement of the first object with respect to the second object. It is provided through the detection sensor unit to provide a micro displacement sensor, characterized in that for measuring the relative movement displacement of the first object and the second object with respect to each other.

According to the present invention, by using a magnet unit generating a magnetic field and a sensing sensor unit for detecting a magnetic field change, it is possible to measure the minute relative displacement displacement of two objects moving relative to each other in a non-contact manner, a simple structure and low cost It can be easily manufactured and has an effect that can be widely applied to vehicles and various machines.

In addition, by connecting the magnet unit and the sensing sensor unit moving relative to each other by a separate clip joint to elastically return to the correct position, there is an effect that it is possible to measure the micro displacement more accurately.

In addition, by adopting a structure that can improve the assemblability with a simple structure and at the same time prevent the misassembly, there is an effect that can significantly reduce the defective rate of the assembly work process.

1 is a perspective view schematically showing the structure of a micro displacement sensor for a vehicle according to an embodiment of the present invention;
Figure 2 is an exploded perspective view schematically showing the internal configuration of a micro displacement sensor for a vehicle according to an embodiment of the present invention,
3 is an operating state diagram schematically showing an operating state of a micro displacement sensor for a vehicle according to an exemplary embodiment of the present disclosure;
4 and 5 is a conceptual diagram conceptually showing the operating principle of the micro displacement sensor for a vehicle according to an embodiment of the present invention,
6 to 9 is a conceptual diagram conceptually showing the operating principle of a micro displacement sensor for a vehicle according to another embodiment of the present invention;
10 to 12 are exploded perspective views schematically showing various assembly states of the magnet unit of the micro displacement sensor for a vehicle according to an embodiment of the present invention;
13 is a flowchart illustrating an electronic brake braking force measuring method using a micro displacement sensor for a vehicle according to an exemplary embodiment of the present disclosure.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a perspective view schematically illustrating a structure of a micro displacement sensor for a vehicle according to an exemplary embodiment of the present invention, and FIG. 2 schematically illustrates an internal configuration of a micro displacement sensor for a vehicle according to an embodiment of the present invention. 3 is an exploded perspective view, and FIG. 3 is an operating state diagram schematically illustrating an operating state of a micro displacement sensor for a vehicle according to an exemplary embodiment of the present disclosure.

The micro displacement sensor for a vehicle according to an embodiment of the present invention is a device which is mounted on a brake caliper to measure the movement force of the brake caliper in a non-contact manner to measure the braking force transmitted to the electronic brake. It is configured to include a magnet unit 100 and a sensing sensor unit 200 which is arranged to be movable, and further comprises a separate clip joint 300 connecting the magnet unit 100 and the sensing sensor unit 200. Can be.

At this time, the magnet unit 100 and the detection sensor unit 200 is coupled to different components to be relatively movable relative to each other, for example, one of the two is coupled to the fixed component and the other is the elastic deformation component or It may be coupled to a movable component, or both may be coupled to different elastically deformable components, or both may be coupled to respective different movable components and configured to be relatively movable relative to each other. For example, when mounted to the brake caliper, the magnet unit 100 may be coupled to the caliper body that is elastically deformed, and the sensing sensor unit 200 may be configured to be coupled to the vehicle body through a separate fastener. Hereinafter, a part to which the magnet unit 100 is coupled will be described as a first object P1 and a part to which the detection sensor unit 200 is coupled to a second object P2.

The magnet unit 100 is coupled to the first object P1 to move integrally with the first object P1 and is configured to generate a magnetic field through the magnet. The magnet unit 100 includes a magnet 120 for generating a magnetic field as shown in FIG. 2, and a magnet case 110 in which an insertion groove 111 is formed at one side such that the magnet 120 is inserted and coupled thereto. Can be configured. In this case, the magnet 120 may be applied as a monopole magnet or may be applied as a multi-pole magnetized magnet of more various forms. On the other hand, the magnet case 110 may be formed with a separate coupling groove 112 for coupling with the first object (P1), it can be coupled to move integrally with the first object (P1).

In addition, a separate cover block 130 may be coupled to one surface on which the insertion groove 111 of the magnet case 110 is formed, and the open surface of the insertion groove 111 may be closed through the cover block 130. As such, the magnet 120 inserted into the insertion groove 111 may be fixed to be prevented from being separated from the insertion groove 111 by being inserted into the insertion groove 111 by the cover block 130.

The detection sensor unit 200 is disposed to be spaced apart from the magnet unit 100, and the magnet unit 100 may detect a magnetic field change due to the movement of the magnet unit 100 moving together with the first object P1. It is arranged so that relative movement with respect to. That is, as described above, the magnet unit 100 is disposed to be coupled to the second object P2 to be moved or fixed separately from the first object P1 to which the magnet unit 100 is coupled and to move relative to the magnet unit 100. In this case, the sensing sensor unit 200 and the magnet unit 100 are disposed to be spaced apart from each other so as not to contact each other.

The sensing sensor unit 200 includes a sensor housing 210 coupled to the second object P2, a PCB substrate 220 mounted inside the sensor housing 210, and a PCB substrate according to an embodiment of the present invention. Is mounted on the 220 is configured to include a Hall sensor 230 for detecting a magnetic field change of the magnet unit (100). In the sensor housing 210, a separate coupling fixing part 212 may be formed so that the sensing sensor unit 200 may be coupled to the second object P2, and on one side thereof, a connector part for electrical connection with the outside ( 211 may be formed.

Meanwhile, a separate fixing block 240 may be provided so that the PCB substrate 220 on which the Hall sensor 230 is mounted may be fixed inside the sensor housing 210, and the fixing block 240 may include the PCB substrate 220. The connector pins 250 are coupled to each other. In the PCB board 220, a bonding hole 221 is formed at a position corresponding to the connector pin 250 so that the connector pin 250 penetrates and is soldered, and the connector pin 250 is formed in the sensor housing 210. Is inserted into the connector 211 and is electrically connected to an external electronic device such as an ECU.

In addition, the Hall sensor 230 mounted on the PCB substrate 220 is positioned adjacent to the magnet 120 of the magnet unit 100 so that the magnetic field change by the magnet 120 of the magnet unit 100 can be detected smoothly. It is preferably arranged in.

As such, when the Hall sensor 230, the PCB board 220, and the fixing block 240 are disposed in the sensor housing 210, a separate housing cover 250 may be provided for external finishing of the sensor housing 210. It may be coupled to one side of the sensor housing 210.

According to such a structure, the micro displacement sensor for a vehicle according to the exemplary embodiment of the present invention senses a magnetic field change generated by the movement of the magnet unit 100 together with the first object P1 through the detection sensor unit 200 and the magnet. The relative movement displacement of the unit 100 can be measured. The measured braking force transmitted to the electronic brake can be measured by calculating the measured value through a separate computing device and converting the data into necessary data, for example, braking braking force.

On the other hand, in the vehicle micro displacement sensor according to an embodiment of the present invention, the magnet unit 100 and the detection sensor unit 200 are connected to each other through a separate clip joint 300. Clip joint 300 is formed of an elastic material to have an elastic force, the first state in the process of returning to the original after the magnet unit 100 and the sensing sensor unit 200 relative to each other by the elastic force of the clip joint 300 Can be returned to the reference position of.

For example, when the magnet unit 100 is coupled to the elastically deformed first object (P1) and finely moved by the elastic deformation of the first object (P1), the movement displacement due to such fine movement is detected sensor unit ( 200, the first object (P1) is elastically deformed by the external load and is returned to its original state when the external load is removed. Therefore, when the first object P1 is returned to its original position, the magnet unit 100 is also returned to its original position at the original position, and all of these processes are detected by the sensor unit 200. However, in the process of returning the first object P1 and the magnet unit 100, very fine permanent deformation may occur, and a case in which the first object P1 and the magnet unit 100 cannot return to the reference position of the initial state correctly may occur. .

Therefore, according to an embodiment of the present invention, the clip joint 300 having an elastic force is mounted to connect the magnet unit 100 and the detection sensor unit 200, and the magnet unit 100 and the detection sensor unit 200 are In the process of returning to the original position after relative movement, the clip joint 300 may be returned to the reference position of the initial state more accurately.

The clip joint 300 is formed at both ends of the elastic deformation portion 310 and the elastic deformation portion 310 to elastically deform according to the relative movement of the magnet unit 100 and the detection sensor unit 200, the magnet unit ( 100 and the first and second coupling parts 320 and 330 coupled to the sensing sensor unit 200, respectively, wherein the elastic deformation part 310 is bent as shown in FIGS. 2 and 3. It is preferably formed in the form.

For example, the elastic deformation unit 310 and the operation unit 311 and the operation unit 311 is formed long in one direction so that the elastic deformation occurs in accordance with the relative movement of the magnet unit 100 and the detection sensor unit 200. It may be configured to include a support portion 312 each extending to be bent in a direction perpendicular to both ends of the). In more detail, the portion where the elastic deformation is substantially generated in the elastic deformation part 310 is the operation part 311, and the support part 312 is configured to serve to support the operation part 311. Therefore, the operating part 311 is formed long along the separation direction of the magnet unit 100 and the sensing sensor unit 200, the support 312 is bent in a direction perpendicular to both ends of the operating part 311. It is formed long.

According to this configuration, when the magnet unit 100 moves relatively from the state (a) to the state (b) of FIG. Is elastically deformed. At this time, the operating portion 311 is elastically deformed at both ends about the center axis (C1, C2) formed along the support portion 312 of both ends, so that the elastic deformation is not concentrated in any one to be more stable elastic deformation Not only can it be elastically deformed more smoothly.

Therefore, the micro-displacement measurement sensor for a vehicle according to the embodiment of the present invention enables smooth relative movement by minimizing the opposite load with respect to the relative movement of the magnet unit 100 and the detection sensor unit 200 according to this structure. At the same time, the elastic return force is strengthened during the original return process of the magnet unit 100 and the detection sensor unit 200 so that the magnet unit 100 and the detection sensor unit 200 return to a more accurate reference position.

4 and 5 is a conceptual diagram conceptually showing the operation principle of the vehicle micro displacement measurement sensor according to an embodiment of the present invention, Figures 6 to 9 is a vehicle micro displacement measurement according to another embodiment of the present invention It is a conceptual diagram conceptually showing the operation principle of a sensor.

As shown in FIGS. 4 and 5 (a) and (b), a micro displacement sensor for a vehicle according to an exemplary embodiment of the present invention may include a magnet 120 and a sensing sensor unit 200 of the magnet unit 100. As the relative position of the Hall sensor 230 changes by the distance of the small displacement Δd, the micro displacement is measured by detecting the change of the magnetic field by the magnet 120 through the Hall sensor 230, wherein the magnet 120 is measured. As shown in FIG. 4, the N pole and the S pole may be applied to a single pole magnet that exists one by one. For more precise measurement, the N pole and the S pole may be applied to a multipole magnetized magnet having two poles. The multi-pole magnetized magnet may be manufactured by simply assembling two single-pole magnets in a separable manner, or may be manufactured as a single piece in a multi-pole magnetized manner.

Also, as shown in FIGS. 6A and 6B, a separate magnetic concentrator may be mounted on the hall sensor 230, or as shown in FIGS. 7A and 7B. As described above, separate magnetic concentrators may be mounted on the hall sensor 230 and the magnet 120, thereby maintaining a higher measurement sensitivity to the minute relative displacement of the magnet 120.

Meanwhile, as illustrated in FIG. 8, a separate back-bias magnet 260 may be mounted on an opposite surface of the hall sensor 230 toward the magnet 120, in which case FIG. 8. By changing the polarity arrangement of the back deflection magnet 260 as shown in (a) and (b) of FIG. 2, different signals can be generated. As the polarity arrangement of the back deflection magnet 260 is changed, each hall sensor 230 generates a voltage signal having a different size range, and thus may be applied to different components. For example, an arrangement as shown in FIG. 8A may be applied to a brake caliper of a vehicle left wheel, and an arrangement as shown in FIG. 8B may be applied to a brake caliper of a vehicle right wheel.

In this case, although the magnet 120 of the magnet unit 100 is illustrated as a single-pole magnet in FIG. 8, in this case, as shown in FIG. 9, the magnet 120 may be applied as a multi-pole magnetized magnet.

10 to 12 are exploded perspective views schematically illustrating various assembly states of the magnet unit of the micro displacement sensor for a vehicle according to an exemplary embodiment of the present disclosure.

Insertion groove 111 is formed in the magnet case 110 as described above, and the magnet 120 is inserted and coupled to the insertion groove 111, in which the polarity arrangement state of the magnet 120 is the Hall sensor 230 In order to be arranged in a predetermined state corresponding to the), in the process of inserting the magnet 120 into the magnet case 110, it should be assembled with this arrangement in mind.

Therefore, in order to prevent a mistake in the assembly of the operator in the insertion groove 111 of the magnet 120, a misassembly prevention means is provided according to an embodiment of the present invention.

For example, as shown in FIG. 10, a chamfering portion T is formed at one edge portion of the insertion groove 111 of the magnet case 110, and the magnet 120 inserted into the insertion groove 111 also has the same. It can be configured in such a way that the chamfering portion (T) of the corresponding shape is formed. Therefore, the magnet 120 is always inserted into the insertion groove 111 by the chamfering portion T only in a specific arrangement state, and in another arrangement state is not inserted into the insertion groove 111 by interference with the chamfering portion T. Do not.

In addition, as shown in FIG. 11, a separate chamfering protrusion T1 is formed on one surface of the insertion groove 111 of the cover block 130 coupled to the magnet case 110, and the magnet 120 includes the same. A chamfering portion T corresponding to the chamfering protrusion T1 may be formed at one corner portion. Therefore, the magnet 120 may be inserted into the insertion groove 111 only in a specific arrangement state by the chamfering protrusion T1 and the chamfering portion T.

Meanwhile, one chamfering protrusion T1 is formed in FIG. 11, and only one chamfering portion T of the magnet 120 corresponding thereto is formed. In contrast, the cover block 130 is illustrated in FIG. 12. Two chamfering projections T1 may be formed at different positions in the two, and two chamfering portions T may be formed in the magnet 120. At this time, the structure shown in Figure 11 is advantageous to apply when the multi-pole magnetized magnet is manufactured in one piece, the structure shown in Figure 12 is applied when the multi-pole magnetized magnet is manufactured in the form of assembly of two single-pole magnet Would be advantageous.

13 is a flowchart illustrating an electronic brake braking force measuring method using a micro displacement sensor for a vehicle according to an exemplary embodiment of the present disclosure.

Referring to the method of measuring the electronic brake braking force by using the micro-displacement measurement sensor described above with reference to FIG. 13, first, when the vehicle is started with the vehicle started (S1), the ECU of the vehicle is in a predetermined range of the electronic brake. Control to apply a braking force of (S2). The braking force generated through the control is measured through the vehicle micro displacement sensor (S3), and the measured actual value is compared with a reference value stored in a separate storage device (S4). On the basis of the comparison values, it is determined whether an error between the measured value and the reference value is less than or equal to a preset reference error (S5). If the measured value is less than or equal to the reference error, the newly measured actual value is sent to the ECU (S6). Measure and control the braking force while driving. As described above, when the vehicle starting is turned off after the braking force is measured and controlled based on the measured value (S7), the measured value is stored in a separate storage device as a new reference value (S8) and ends.

At this time, if the difference between the measured value and the reference value is equal to or more than the reference error, the reference value of the storage device is sent to the ECU (S9), and the ECU measures and controls the braking force during driving based on the reference. Exits without saving a new file.

On the other hand, the above-described micro displacement measurement sensor is limited to a vehicle, but it is described. It can be applied as a measuring sensor. That is, it can be widely applied to various industrial machines.

The general micro displacement measurement sensor has the same structure as the above-described micro displacement sensor for a vehicle, and more specifically, the magnet unit 100 and the magnet unit 100 coupled to move integrally with the first object P1. And a sensing sensor unit 200 disposed to be spaced apart from and coupled to move integrally with the second object P2 so as to be relatively movable with the magnet unit 100, and the first object with respect to the second object P2. The change in the magnetic field of the magnet unit 100 generated by the relative movement of P1 is detected through the detection sensor unit 200 to determine the relative displacement of the first object P1 and the second object P2 relative to each other. Measure

In this case, the magnet unit 100 and the detection sensor unit 200 may be coupled to be connected through a separate clip joint 300 as described above, and all the same structure as described in FIGS. Since it is applicable, detailed description thereof will be omitted.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: magnet unit 120: magnet
200: detection sensor unit 230: Hall sensor
300: clip joint 310: elastic deformation portion
311: operating part 312: support part

Claims (11)

In the vehicle micro displacement measurement sensor mounted on the brake caliper for measuring the braking force transmitted to the electronic brake,
A magnet unit coupled to move integrally with the caliper body and generating a magnetic field; And a sensing sensor unit disposed to be spaced apart from the magnet unit, the sensing sensor unit being disposed to be movable relative to the magnet unit so as to sense a magnetic field change due to the movement of the magnet unit, and the magnet unit through the sensing sensor unit. Detect relative displacement of
The magnet unit and the sensing sensor unit are connected through separate clip joints, and are returned to their original positions by the elastic force of the clip joints in the process of returning to the original state after relative movement.
The clip joint may include: an elastic deformation unit that elastically deforms according to a relative movement of the magnet unit and the detection sensor unit; And first and second coupling parts formed at both ends of the elastic deformation part and coupled to the magnet unit and the sensing sensor unit, respectively, wherein the elastic deformation part is formed in a bent shape. sensor.
delete delete The method of claim 1,
The elastic deformation portion
An actuating part elongated in one direction so that elastic deformation occurs according to relative movement of the magnet unit and the sensing sensor unit; And
Support portions each extending to be bent at right angles to both ends of the operating portion
Micro displacement measurement sensor for a vehicle comprising a.
The method according to claim 1 or 4,
The magnet unit is
A magnet case in which an insertion groove is formed at one side; And
Magnet inserted into the insertion groove of the magnet case
Includes, wherein the magnet is a micro displacement sensor for a vehicle, characterized in that a single pole magnet or a multi-pole magnetized magnet is applied.
The method of claim 5, wherein
And a chamfering portion corresponding to each other so that the magnet can be inserted into and coupled to the insertion groove in a specific arrangement direction in the insertion groove of the magnet case and the one corner portion of the magnet.
The method of claim 5, wherein
A separate cover block for closing the insertion groove is coupled to the magnet case to prevent the magnet from being separated from the insertion groove of the magnet case, and a chamfering protrusion is formed on one surface of the cover block facing the insertion groove. And a chamfering portion corresponding to the chamfering protrusion so that the magnet is inserted and coupled to the insertion groove in a specific arrangement direction.
The method of claim 5, wherein
One side of the magnet is a small displacement measuring sensor for a vehicle, characterized in that the magnetic concentrator is mounted.
The method according to claim 1 or 4,
The detection sensor unit
Sensor housings;
A PCB substrate mounted inside the sensor housing; And
A hall sensor mounted on the PCB to sense a magnetic field change of the magnet unit
Micro displacement measurement sensor for a vehicle comprising a.
The method of claim 9,
One side of the Hall sensor is a vehicle small displacement measurement sensor, characterized in that the magnetic concentrator is mounted.
A micro displacement sensor for measuring relative displacements relative to each other with respect to first and second objects capable of relative movement,
A magnet unit coupled to move integrally with the first object; And
A sensing sensor unit coupled to move integrally with the second object and disposed to be spaced apart from the magnet unit
And a magnetic field change of the magnet unit generated according to the relative movement of the first object with respect to the second object through the sensing sensor unit, so that the first object and the second object are relative to each other. Measure displacement,
The magnet unit and the sensing sensor unit are connected through separate clip joints, and are returned to their original positions by the elastic force of the clip joints in the process of returning to the original state after relative movement.
The clip joint may include: an elastic deformation unit that elastically deforms according to a relative movement of the magnet unit and the detection sensor unit; And first and second coupling parts formed at both ends of the elastic deformation part and coupled to the magnet unit and the sensing sensor unit, respectively, wherein the elastic deformation part is formed in a bent shape. .

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