Sensor, steering assembly and vehicle

Abstract

The utility model relates to a sensor, a steering assembly and a vehicle. The sensor comprises a shell and a circuit board. The housing has a base plate. The circuit board is arranged in the shell. The circuit board and the bottom plate are arranged at intervals. Therefore, the possibility of direct contact or close-range electromagnetic interference of the circuit board is reduced, the anti-interference capability of the circuit board is improved, and the measurement precision of the sensor is improved.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and more particularly to a sensor, a steering assembly, and a vehicle. Background Technology

[0002] In related technologies, displacement sensors typically utilize physical principles such as coil induction and eddy currents to detect the position of a target metal. The target metal slides above the coil, causing the coil to induce a secondary voltage and acquire the position signal of the target metal above the coil. However, when the magnetic field generated by the coil on the circuit board is interfered with by an external high-frequency magnetic field, confusion and other phenomena occur, causing abnormal magnetic field signals received by the coil and reducing the measurement accuracy of the displacement sensor. Utility Model Content

[0003] This application provides a sensor, a steering assembly, and a vehicle, which improves the sensor's anti-interference capability and at least partially solves the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a sensor is provided, comprising:

[0005] The casing has a base plate;

[0006] A circuit board is disposed inside the housing, and the circuit board is spaced apart from the base plate.

[0007] Optionally, the distance between the circuit board and the base plate is D, which satisfies: 10 mm ≤ D ≤ 20 mm.

[0008] Optionally, the base plate is configured with a support column protruding toward the circuit board, and the support column abuts against the circuit board.

[0009] Optionally, the sensor further includes:

[0010] A cover is connected to the housing, and the cover is spaced apart from the base plate;

[0011] A sliding component is slidably mounted on the side of the housing cover away from the base plate;

[0012] The circuit board is equipped with a sensor, which is used to obtain the position of the slider.

[0013] Optionally, the circuit board has a shielding layer on the side facing away from the housing and / or the bottom plate, and the projection of the shielding layer along the height direction of the housing at least covers the sensing element.

[0014] Optionally, the sensing element includes:

[0015] An excitation unit is located on the side of the circuit board facing the housing cover, and the excitation unit is configured to generate a magnetic field when energized;

[0016] A sensing unit is disposed on the side of the circuit board facing the housing cover, and the sensing unit is configured to generate an induced voltage under the action of the magnetic field;

[0017] The sliding member is connected to a sensing element, which is configured to generate eddy currents under the action of the magnetic field to change the voltage amplitude of the induced voltage generated by the sensing unit.

[0018] Optionally, the excitation unit is configured to generate a first alternating magnetic field under the action of alternating current, and the sensing element is configured to generate eddy currents under the action of the first alternating magnetic field to generate a second alternating magnetic field with the magnetic field direction opposite to that of the first alternating magnetic field. The first alternating magnetic field is configured to act on the sensing unit to induce a voltage, and the second alternating magnetic field is configured to act on the sensing unit to change the voltage amplitude of the induced voltage generated by the sensing unit.

[0019] Optionally, the excitation unit includes:

[0020] An excitation coil is located on the side of the circuit board facing the housing, and the excitation coil is configured to generate a magnetic field when energized.

[0021] Optionally, the sensing unit includes:

[0022] A first induction coil is disposed on the side of the circuit board facing the housing cover, and the first induction coil is configured to generate a first induced voltage under the action of the magnetic field;

[0023] A second induction coil is disposed on the side of the circuit board facing the housing cover, and the second induction coil is configured to generate a second induced voltage under the action of the magnetic field;

[0024] The sensing element is configured to generate eddy currents under the action of the magnetic field to change the voltage amplitudes of the first induced voltage and the second induced voltage.

[0025] Optionally, along the height direction of the housing, the projection of the shielding layer covers at least the excitation coil, the first induction coil, and the second induction coil.

[0026] Optionally, the shielding layer may include a metal layer or a conductive tape.

[0027] Optionally, the sensing element further includes:

[0028] A central control unit is disposed on the circuit board, and the central control unit is electrically connected to the excitation coil, the first induction coil and the second induction coil;

[0029] The central control unit is used to obtain the position parameters of the sensing element based on the first sensing voltage and the second sensing voltage.

[0030] Optionally, both the first induction coil and the second induction coil are configured as wavy, and the phase difference between the first induction coil and the second induction coil is 90 degrees.

[0031] Optionally, the first induction coil includes a first induction segment in the shape of a sine curve, and the second induction coil includes a second induction segment in the shape of a cosine curve.

[0032] Optionally, the circuit board is provided with an identification bit configured to be identified by a machine on the production line.

[0033] Optionally, the circuit board is provided with a foolproof notch.

[0034] Optionally, the anti-foolproof position includes a groove formed on the edge of the circuit board, and a protrusion is provided on the inner surface of the housing, the groove engaging with the protrusion.

[0035] Optionally, the circuit board has at least two spaced-apart through holes configured as terminals for passing cables.

[0036] According to a second aspect of this application, a steering assembly is also provided, including the sensors as described above.

[0037] According to a third aspect of this application, a vehicle is also provided, including the steering assembly as described above.

[0038] In the sensors, steering assemblies, and vehicles of this application embodiment, by spacing the circuit board from the base plate of the housing, the possibility of the circuit board being in direct contact or subject to electromagnetic interference at close range is reduced, thereby improving the anti-interference capability of the circuit board and improving the measurement accuracy of the sensors on the circuit board.

[0039] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0042] Figure 1 This is an exploded view of the sensor provided in an exemplary embodiment of this application;

[0043] Figure 2 This is a cross-sectional view of the sensor provided in an exemplary embodiment of this application;

[0044] Figure 3 This is a top view of the circuit board provided in an exemplary embodiment of this application;

[0045] Figure 4 This is a bottom view of the circuit board provided in an exemplary embodiment of this application;

[0046] Figure 5 This is a partial cross-sectional view of the steering assembly provided in an exemplary embodiment of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Shell; 11. Base plate; 12. Support column;

[0049] 2. Circuit board; 21. Sensing element; 211. Excitation coil; 212. First induction coil; 213. Second induction coil; 214. Central control unit; 22. Identification position; 23. Foolproof position; 24. Through hole;

[0050] 3. Shell cover;

[0051] 4. Sliding component; 41. Sensing component;

[0052] 5. Shielding layer;

[0053] 61. Sealing ring; 62. Corrugated thread; 63. Corrugated pipe; 64. Connector;

[0054] 7. Limiting post. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0056] According to the first aspect of this application, referring to Figures 1 to 5This application provides a sensor. The sensor includes a housing 1 and a circuit board 2. The housing 1 has a base plate 11. The circuit board 2 is disposed inside the housing 1. The circuit board 2 is spaced apart from the base plate 11.

[0057] In this embodiment, by spacing the circuit board 2 from the base plate 11 of the housing 1, the possibility of the circuit board 2 being in direct contact or being subject to electromagnetic interference at close range is reduced, thereby improving the anti-interference capability of the circuit board 2 and improving the measurement accuracy of the sensor.

[0058] It should be noted that, as Figure 5 As shown, when this sensor is applied to the steering assembly, the upper, left and right sides, and front and rear sides of the housing 1 can all be shielded by metal parts, and no electromagnetic interference will occur in these five directions. In this embodiment, the circuit board 2 is spaced apart from the bottom plate 11 of the housing 1, which keeps the circuit board 2 away from the bottom of the housing 1, thereby reducing the possibility of the circuit board 2 being in direct contact with or being subjected to electromagnetic interference at close range.

[0059] In some embodiments, the housing 1 may be square, and the shape of the circuit board 2 may be adapted to the shape of the housing 1 so that the circuit board 2 can be installed inside the housing 1.

[0060] like Figure 2 As shown, in some embodiments, the distance between the circuit board 2 and the base plate 11 is D, which satisfies: 10 mm ≤ D ≤ 20 mm.

[0061] It is understandable that the distance between the circuit board 2 and the base plate 11 is set in the range of 10 mm to 20 mm, so that the circuit board 2 and the base plate 11 have sufficient distance to ensure that the circuit board 2 is kept away from electromagnetic interference and improve the measurement accuracy of the sensor 21.

[0062] It should be noted that the distance between circuit board 2 and base plate 11 refers to the distance between the lower surface of circuit board 2 and the upper surface of base plate 11. When the distance between circuit board 2 and base plate 11 is less than 10 mm, the improvement in the electromagnetic interference resistance of circuit board 2 is poor, resulting in a lack of significant improvement in the measurement accuracy of sensor 21. When the distance between circuit board 2 and base plate 11 is greater than 20 mm, the sensor will be too tall, occupying too much height space, which is not conducive to its installation in a vehicle.

[0063] In some embodiments, the distance between the circuit board 2 and the base plate 11 is set to 10 mm, 15 mm, 20 mm, or any value between the two.

[0064] like Figure 1 As shown, in some embodiments, the base plate 11 is constructed with a support post 12 protruding toward the circuit board 2, and the support post 12 abuts against the circuit board 2.

[0065] Understandably, the support column 12 is used to support the circuit board 2 so that the circuit board 2 can be spaced apart from the base plate 11. The height of the support column 12 is the distance between the circuit board 2 and the base plate 11. Therefore, the height of the support column 12 is set in the range of 10 mm to 20 mm.

[0066] The support column 12 can be integrally formed within the housing 1. The number of support columns 12 can be set to multiple, so as to use multiple support columns 12 to stably and reliably fix and support the circuit board 2.

[0067] It should be noted that the support column 12 may have threaded holes, and the circuit board 2 may have mounting holes. Fasteners are sequentially inserted into the mounting holes and threaded holes to achieve reliable fixation between the circuit board 2 and the support column 12.

[0068] Please continue reading. Figure 1 In some embodiments, the sensor further includes a housing cover 3 and a slider 4. The housing cover 3 is connected to the housing 1 and is spaced apart from the base plate 11. The slider 4 is slidably mounted on the side of the housing cover 3 away from the base plate 11. A sensing element 21 is provided on the circuit board 2 to obtain the position of the slider 4.

[0069] Understandably, an opening is formed at the top of the housing 1 to assemble the circuit board 2 inside the housing 1. A cover 3 is connected to the housing 1 to close the opening of the housing 1. The cover 3 is spaced apart from the base plate 11, thereby forming a mounting cavity with a certain height inside the housing 1, thus realizing the mounting of the circuit board 2.

[0070] It should be noted that a sensor 21 is provided on the circuit board 2. This sensor 21 can be used to obtain the position of the slider 4, thereby using this sensor as a displacement sensor to obtain the position parameters of the slider 4.

[0071] like Figure 5 As shown, in some embodiments, the slider 4 is connected to a limit post 7, which is connected to the drive rod of the steering assembly. Sliding the slider 4 along the cover 3 reflects changes in the wheel angle within the steering assembly. The position of the slider 4 is obtained using the sensor 21, and based on this position parameter, the wheel angle position information can be obtained.

[0072] like Figure 1 As shown, in some embodiments, a sealing ring 61 is also provided between the cover 3 and the housing 1 to achieve a sealed connection between the housing 1 and the cover 3. A corrugated buckle 62 may also be provided on the housing 1, and a corrugated tube 63 is connected to the corrugated buckle 62. A connector 64 is connected to the end of the corrugated tube 63 away from the corrugated buckle 62. The connector 64 is used to connect electrical components. The corrugated tube 63 can accommodate cables. This achieves electrical connection between the circuit board 2 and other electrical components.

[0073] like Figure 4 As shown, in some embodiments, the circuit board 2 has a shielding layer 5 on the side facing away from the housing cover 3 and / or on the bottom plate 11. Along the height direction of the housing 1, the projection of the shielding layer 5 at least covers the sensing element 21.

[0074] Understandably, the shielding layer 5 serves as magnetic shielding, protecting the sensor 21 on the circuit board 2 from high-frequency magnetic field interference, thereby reducing the likelihood of it being affected by external radiation interference. Since the shielding layer 5 is located on the lower surface of the circuit board 2 and / or the base plate 11, it compensates for the lack of a metal environment surrounding the bottom, improving the sensor 21's resistance to electromagnetic interference.

[0075] In some embodiments, the shielding layer 5 is a copper foil. Copper foil has good conductivity; when an external high-frequency alternating magnetic field passes through it, eddy currents are formed. These eddy currents are induced currents that can generate a magnetic field, hindering the original field, thereby absorbing and reflecting electromagnetic wave signals, achieving the effect of shielding high-frequency electromagnetic wave signals.

[0076] In this embodiment, by spacing the circuit board 2 from the base plate 11 and providing a shielding layer 5 on the circuit board 2 and / or the base plate 11, the electromagnetic interference resistance of the sensor 21 on the circuit board 2 is improved, the measurement accuracy of the sensor 21 is improved, and the accuracy of the wheel angle position information is ensured.

[0077] Along the height of the housing 1, the projection of the shielding layer 5 at least covers the sensing element 21 to ensure that the shielding layer 5 can at least shield the sensing element 21 from electromagnetic interference and ensure the stability of the magnetic field of the sensing element 21. For example, if the sensing element 21 is rectangular, then the shielding layer 5 is also rectangular, and the length of the shielding layer 5 is greater than or equal to the length of the sensing element 21, and the width of the shielding layer 5 is greater than or equal to the width of the sensing element 21. Of course, the sensing element 21 and the shielding layer 5 can also be set to other shapes, as long as the shielding layer 5 can effectively prevent electromagnetic interference to the sensing element 21.

[0078] In some embodiments, the shielding layer 5 is provided only on the side of the circuit board 2 facing away from the housing 3. Alternatively, the shielding layer 5 is provided only on the upper surface of the base plate 11. Alternatively, the shielding layer 5 is provided only on the lower surface of the base plate 11. Alternatively, the shielding layer 5 can be provided on both the circuit board 2 and the base plate 11.

[0079] In this embodiment, the shielding layer 5 is preferably disposed on the side of the circuit board 2 facing away from the cover 3. Therefore, it is not necessary to provide the shielding layer 5 on the bottom plate 11 of the housing 1, which simplifies the structure of the housing 1 and facilitates the manufacturing of the housing 1.

[0080] like Figure 3As shown, in some embodiments, the sensing element 21 includes an excitation unit and a sensing unit. The excitation unit is located on the side of the circuit board 2 facing the housing 3, and is configured to generate a magnetic field when energized. The sensing unit is located on the side of the circuit board 2 facing the housing 3, and is configured to generate an induced voltage under the influence of the magnetic field. A slider 4 is connected to the sensing element 41, which is configured to generate eddy currents under the influence of the magnetic field to change the voltage amplitude of the induced voltage generated by the sensing unit.

[0081] Understandably, the excitation unit generates a magnetic field after being energized, causing the sensing unit to generate an induced voltage based on the magnetic field. When the slider 4 slides along the upper surface of the cover 3, the eddy currents generated by the sensing element 41 under the action of the magnetic field change, causing a change in the voltage amplitude of the induced voltage generated by the sensing unit. Therefore, the position of the sensing element 41 can be determined based on the voltage amplitude of the sensing unit, thereby obtaining the current position of the slider 4 to reflect the angular position information of the wheel.

[0082] In some embodiments, the sensing element 41 is a metal sheet. For example, the sensing element 41 is made of materials such as copper, aluminum, iron, or stainless steel.

[0083] It is understandable that, based on the fact that the sensing element 41 can generate eddy currents under the action of a magnetic field, the eddy currents can cause the sensing unit to output induced voltages of different voltage amplitudes after acting on the sensing unit.

[0084] In some embodiments, the excitation unit is configured to generate a first alternating magnetic field under the influence of alternating current. The inductor 41 is configured to generate eddy currents under the influence of the first alternating magnetic field to generate a second alternating magnetic field with a direction opposite to that of the first alternating magnetic field. The first alternating magnetic field is configured to act on the inductor to induce a voltage. The second alternating magnetic field is configured to act on the inductor to change the voltage amplitude of the induced voltage generated by the inductor.

[0085] Understandably, alternating current can be supplied to the excitation unit, which generates a first alternating magnetic field. When this first alternating magnetic field acts on the sensing element 41, it generates eddy currents. These eddy currents cause the sensing element 41 to generate a second alternating magnetic field with the opposite direction to the first alternating magnetic field. When the first alternating magnetic field acts on the sensing unit, it induces a voltage. When the second alternating magnetic field acts on the sensing unit, it changes the amplitude of the induced voltage. The degree of change in voltage amplitude varies depending on the position of the sensing element 41. Therefore, the position of the sensing element 41 can be determined based on the magnitude of the voltage amplitude, thereby obtaining the current position of the sliding element 4 and reflecting the angular position information of the wheel.

[0086] Please continue reading. Figure 3 In some embodiments, the excitation unit includes an excitation coil 211. The excitation coil 211 is disposed on the side of the circuit board 2 facing the housing 3. The excitation coil 211 is configured to generate a magnetic field when energized.

[0087] It is understandable that after providing alternating current to the excitation coil 211, the excitation coil 211 can generate an alternating magnetic field based on the action of the alternating current. Under the action of the alternating magnetic field, the induction unit generates an induced current.

[0088] It should be noted that the alternating current is of fixed frequency and fixed amplitude. According to Faraday's law of induction, this alternating current can generate an alternating magnetic field in the excitation coil 211. The alternating magnetic field acting on the sensing unit can generate an alternating induced voltage. The amplitude of this alternating induced voltage will be affected by the magnetic field strength. Therefore, by creating an alternating magnetic field with opposite directions in the sensing element 41, it is ensured that the sensing unit generates different induced voltage values ​​when the sliding element 4 is at different positions on the upper surface of the housing 1.

[0089] Please continue reading. Figure 3 In some embodiments, the sensing unit includes a first induction coil 212 and a second induction coil 213. The first induction coil 212 is disposed on the side of the circuit board 2 facing the housing 3. The first induction coil 212 is configured to generate a first induced voltage under the action of a magnetic field. The second induction coil 213 is disposed on the side of the circuit board 2 facing the housing 3. The second induction coil 213 is configured to generate a second induced voltage under the action of a magnetic field. The sensing element 41 is configured to generate eddy currents under the action of a magnetic field to change the voltage amplitude of the first and second induced voltages.

[0090] It is understandable that by obtaining the first induced voltage and the second induced voltage through the first induction coil 212 and the second induction coil 213 respectively, the central control unit 214 can directly output the position parameters of the sensing element 41 based on the current values ​​of the first induced voltage and the second induced voltage, thereby obtaining the current position of the sliding element 4 to reflect the angular position information of the wheel.

[0091] In this embodiment, the position parameters of the sensing element 41 are obtained by acquiring the first induced voltage and the second induced voltage through the first induction coil 212 and the second induction coil 213, respectively. By setting two induction coils, the influence of possible interference magnetic fields can be canceled and the influence of temperature changes can be compensated.

[0092] In some embodiments, the first induction coil 212, the second induction coil 213, and the excitation coil 211 can all be configured as multi-strand windings to ensure signal strength.

[0093] like Figure 3 and Figure 4 As shown, in some embodiments, along the height direction of the housing 1, the projection of the shielding layer 5 covers at least the excitation coil 211, the first induction coil 212, and the second induction coil 213.

[0094] Understandably, along the height direction of the housing 1, the projection of the shielding layer 5 at least covers the excitation coil 211, the first induction coil 212, and the second induction coil 213 to ensure that the shielding layer 5 can at least shield the excitation coil 211, the first induction coil 212, and the second induction coil 213 from electromagnetic interference, thus ensuring the stability of the magnetic field of the sensing element 21. For example, the excitation coil 211 is set as a rectangle, and the first induction coil 212 and the second induction coil 213 are set within the rectangular area of ​​the excitation coil 211. In this case, the shielding layer 5 is also set as a rectangle, and the length of the shielding layer 5 is greater than or equal to the length of the excitation coil 211, and the width of the shielding layer 5 is greater than or equal to the width of the excitation coil 211.

[0095] In some embodiments, the shielding layer 5 includes a metal layer or a conductive tape.

[0096] For example, shielding layer 5 is made of copper foil. Copper foil has good conductivity. When an external high-frequency alternating magnetic field passes through the copper foil, eddy currents will be formed on the copper foil. These eddy currents are a type of induced current that can generate a magnetic field, which hinders the original field, thereby absorbing and reflecting electromagnetic wave signals, achieving the effect of shielding high-frequency electromagnetic wave signals.

[0097] For example, shielding layer 5 is a conductive tape adhered to the lower surface of circuit board 2. This conductive tape can also achieve electromagnetic shielding through the principles described above.

[0098] In some embodiments, the circuit board 2 includes N layers, where N ≥ 3 and N is an integer. Along the direction from the cover 3 to the base plate 11, there are first layer, second side plate, ..., Nth layer. A first induction coil 212 and a second induction coil 213 may be disposed on the first layer, and an excitation coil 211 may be disposed on the second layer. A shielding layer 5 and a central control unit 214 may be disposed on the lower surface of the Nth layer.

[0099] Please continue reading. Figure 4 In some embodiments, the sensing element 21 further includes a central control unit 214. The central control unit 214 is disposed on the circuit board 2. The central control unit 214 is electrically connected to the excitation coil 211, the first induction coil 212, and the second induction coil 213. The central control unit 214 is used to obtain the position parameters of the sensing element 41 based on the first induced voltage and the second induced voltage.

[0100] Understandably, the central control unit 214, as the power supply component of the sensing element 21, can provide alternating current to the excitation coil 211 so that the excitation coil 211 can generate an alternating magnetic field. The central control unit 214 can also serve as a control component for the first induction coil 212 and the second induction coil 213, thereby receiving the first induced voltage and the second induced voltage generated by the first induction coil 212 and the second induction coil 213, and obtaining the current position of the sensing element 41 based on the values ​​of the first induced voltage and the second induced voltage, thereby obtaining the current position of the sliding element 4 to reflect the angular position information of the wheel.

[0101] It should be noted that the central control unit 214 can be connected to a power source. After the power source supplies power to the central control unit 214, the electrical energy is transmitted to the excitation coil 211 through the central control unit 214, thereby causing the excitation coil 211 to generate an alternating magnetic field. The central control unit 214 is also connected to an interface circuit, which can be connected to the vehicle's infotainment system to obtain the current position of the sensor 41, thereby obtaining the current position of the sliding member 4 to reflect the angular position information of the wheel.

[0102] In some embodiments, the central control unit 214 may be configured as an MCU (Microcontroller Unit) or a CPU (Central Processing Unit). For example, the central control unit 214 may be configured as a ZMID52XX chip, an LX33XX chip, etc.

[0103] In some embodiments, both the first induction coil 212 and the second induction coil 213 are configured in a wavy shape. The phase difference between the first induction coil 212 and the second induction coil 213 is 90 degrees.

[0104] It is understandable that, based on setting the first induction coil 212 and the second induction coil 213 to a wave shape, when the slider 4 slides along the upper surface of the cover 3, the relative positions of the first induction coil 212, the second induction coil 213, the excitation unit, and the sensing element 21 change, so that the amplitude of the induced voltage generated by the first induction coil 212 and the second induction coil 213 changes periodically with the position of the coil.

[0105] In this embodiment, the phase difference between the first induction coil 212 and the second induction coil 213 is set to 90 degrees. This will result in different variation patterns between the first induction coil 212 and the second induction coil 213, making it easier to combine two different induced voltage values ​​to reflect the position parameters of the sensing element 41.

[0106] In some embodiments, a 90-degree phase difference between the first induction coil 212 and the second induction coil 213 means that the peaks of the first induction coil 212 and the second induction coil 213 are misaligned. When the first induction coil 212 and the second induction coil 213 form a wave-shaped induction coil structure with a period of 2π, the peaks of the first induction coil 212 and the second induction coil 213 are misaligned by 90 degrees.

[0107] In some embodiments, the first induction coil 212 is a symmetrically arranged induction coil, and the second induction coil 213 is also a symmetrically arranged induction coil.

[0108] like Figure 3 As shown, in some embodiments, the first induction coil 212 includes a first induction segment in the shape of a sine curve. The second induction coil 213 includes a second induction segment in the shape of a cosine curve.

[0109] Understandably, setting the first induction coil 212 to a sine curve shape and the second induction coil 213 to a cosine curve shape ensures a 90-degree phase difference between the first induction coil 212 and the second induction coil 213. Simultaneously, ensuring a 90-degree phase difference between the first waveform of the first induced voltage generated by the first induction coil 212 and the second waveform of the second induced voltage generated by the second induction coil 213 facilitates the subsequent calculation of the position parameters of the sensing element 41.

[0110] Please continue reading. Figure 3 and Figure 4 In some embodiments, an identification bit 22 is constructed on the circuit board 2. The identification bit 22 is configured to be identified by machines on the production line.

[0111] It is understandable that the identification bit 22 can be identified by the machines on the production line so that the machines on the production line know the position of the circuit board 2 and draw lines on different positions of the circuit board 2 according to preset requirements.

[0112] It should be noted that machine recognition methods include visual recognition, signal recognition, etc.

[0113] For example, identification bit 22 is an identification point. The machine identifies this identification point through visual recognition to obtain the position information of circuit board 2.

[0114] In some embodiments, the circuit board 2 may be provided with two identification bits 22, and the two identification bits 22 are diagonally distributed. Of course, the number of identification bits 22 can also be reasonably set according to the shape and size of the circuit board 2.

[0115] Please continue reading. Figure 3 and Figure 4 In some embodiments, the circuit board 2 is provided with a foolproof notch 23.

[0116] Understandably, the foolproof positioning 23 can prevent the circuit board 2 from being installed backwards inside the housing 1, ensuring the accuracy and reliability of the installation of the circuit board 2 and reducing product defects caused by manufacturing.

[0117] In some embodiments, the anti-fooling position 23 includes a groove formed on the edge of the circuit board 2, and a protrusion is provided on the inner surface of the housing 1, with the groove engaging with the protrusion.

[0118] Understandably, by providing a groove on the edge of the circuit board 2 and a protrusion on the inner surface of the housing 1, the groove and the protrusion engage, thus preventing mistaken installation. This prevents the circuit board 2 from being installed backwards inside the housing 1, ensuring the accuracy and reliability of the circuit board 2's installation and reducing product defects caused by manufacturing defects.

[0119] It should be noted that, in order to ensure the foolproof effect, when the circuit board 2 has a symmetrical structure, the groove is far away from the axis of symmetry of the circuit board 2.

[0120] Please continue reading. Figure 3 and Figure 4 In some embodiments, the circuit board 2 is provided with at least two spaced-apart through holes 24, which are configured as terminals for passing cables.

[0121] Understandably, the through-hole 24 is used for cable terminals to achieve electrical connection between the circuit board 2 and external electrical components. Multiple through-holes 24 are provided to create a redundant design, thus adapting to different usage requirements.

[0122] For example, one, two, or more through holes 24 can be selected based on the signal from the central control unit 214 to achieve one-channel signal design, two-channel signal design, or multi-channel signal design.

[0123] According to a second aspect of this application, a steering assembly is provided that includes the aforementioned minimum sensor. This steering assembly possesses all the beneficial effects of the aforementioned sensor, which will not be elaborated further herein.

[0124] According to a third aspect of this application, a vehicle is provided that includes the aforementioned steering assembly, and the vehicle has all the beneficial effects of the aforementioned steering assembly, which will not be elaborated further herein.

[0125] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

[0126] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0127] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0128] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0129] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A sensor, characterized in that, include: The casing has a base plate; A circuit board is disposed inside the housing, and the circuit board is spaced apart from the base plate. A cover is connected to the housing, and the cover is spaced apart from the base plate; A sliding component is slidably mounted on the side of the housing cover away from the base plate; The circuit board is equipped with a sensor, which is used to obtain the position of the slider.

2. The sensor according to claim 1, characterized in that, The distance between the circuit board and the base plate is D, which satisfies the following condition: 10 mm ≤ D ≤ 20 mm.

3. The sensor according to claim 1, characterized in that, The base plate has a support column protruding towards the circuit board, and the support column abuts against the circuit board.

4. The sensor according to any one of claims 1 to 3, characterized in that, The circuit board is provided with a shielding layer on the side facing away from the housing and / or the bottom plate, and the projection of the shielding layer along the height direction of the housing at least covers the sensing element.

5. The sensor according to claim 4, characterized in that, The sensing element includes: An excitation unit is located on the side of the circuit board facing the housing cover, and the excitation unit is configured to generate a magnetic field when energized; A sensing unit is disposed on the side of the circuit board facing the housing cover, and the sensing unit is configured to generate an induced voltage under the action of the magnetic field; The sliding member is connected to a sensing element, which is configured to generate eddy currents under the action of the magnetic field to change the voltage amplitude of the induced voltage generated by the sensing unit.

6. The sensor according to claim 5, characterized in that, The excitation unit is configured to generate a first alternating magnetic field under the action of alternating current. The induction element is configured to generate eddy currents under the action of the first alternating magnetic field to generate a second alternating magnetic field with the magnetic field direction opposite to that of the first alternating magnetic field. The first alternating magnetic field is configured to act on the induction unit to induce a voltage. The second alternating magnetic field is configured to act on the induction unit to change the voltage amplitude of the induced voltage generated by the induction unit.

7. The sensor according to claim 5, characterized in that, The excitation unit includes: An excitation coil is located on the side of the circuit board facing the housing, and the excitation coil is configured to generate a magnetic field when energized.

8. The sensor according to claim 7, characterized in that, The sensing unit includes: A first induction coil is disposed on the side of the circuit board facing the housing cover, and the first induction coil is configured to generate a first induced voltage under the action of the magnetic field; A second induction coil is disposed on the side of the circuit board facing the housing cover, and the second induction coil is configured to generate a second induced voltage under the action of the magnetic field; The sensing element is configured to generate eddy currents under the action of the magnetic field to change the voltage amplitudes of the first induced voltage and the second induced voltage.

9. The sensor according to claim 8, characterized in that, Along the height direction of the housing, the projection of the shielding layer covers at least the excitation coil, the first induction coil, and the second induction coil.

10. The sensor according to claim 9, characterized in that, The shielding layer includes a metal layer or conductive tape.

11. The sensor according to claim 8, characterized in that, The sensing element also includes: A central control unit is disposed on the circuit board, and the central control unit is electrically connected to the excitation coil, the first induction coil and the second induction coil; The central control unit is used to obtain the position parameters of the sensing element based on the first sensing voltage and the second sensing voltage.

12. The sensor according to claim 8, characterized in that, Both the first induction coil and the second induction coil are configured as wavy, and the phase difference between the first induction coil and the second induction coil is 90 degrees.

13. The sensor according to claim 12, characterized in that, The first induction coil includes a first induction segment in the shape of a sine curve, and the second induction coil includes a second induction segment in the shape of a cosine curve.

14. The sensor according to any one of claims 1 to 3, characterized in that, The circuit board has an identification bit configured to be recognized by machines on the production line.

15. The sensor according to any one of claims 1 to 3, characterized in that, The circuit board has a foolproof notch.

16. The sensor according to claim 15, characterized in that, The anti-foolproof position includes a groove formed on the edge of the circuit board, and a protrusion is provided on the inner surface of the housing, and the groove engages with the protrusion.

17. The sensor according to any one of claims 1 to 3, characterized in that, The circuit board has at least two spaced-apart through holes configured as terminals for cables to pass through.

18. A steering assembly, characterized in that, Includes the sensor as described in any one of claims 1 to 17.

19. A vehicle, characterized in that, Includes the steering assembly as described in claim 18.

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