A signal detection device

Abstract

The application discloses a signal detection device, and relates to the field of signal detection.The signal detection device comprises a device body, a connecting pipe and a probe.The probe comprises a probe shell, a positioning member and a sensing member.The probe shell and the positioning member are respectively provided with a first detection contact plane and a second detection contact plane which are perpendicular to each other.The sensing member is configured in an L-shaped structure.The horizontal part and the vertical part of the L-shaped structure are parallel to the first detection contact plane and the second detection contact plane respectively.The device has the ability to detect signal sources in the front and on the side.The traditional arc-shaped contact surface is cancelled.The two detection contact planes can be attached to the position to be detected to improve the detection precision.The device is designed to detect in multiple directions and can be attached to detect in the front and on the side in a narrow space, and has high flexibility.

Description

Technical Field

[0001] This application relates to the field of signal detection, and more particularly to a signal detection device. Background Technology

[0002] A handheld intelligent control signal detector is a portable device used to actively detect, identify, and locate specific types of signal sources. It is characterized by its small size, light weight, and intuitive operation, and is widely used in security inspection, communication engineering, industrial testing, and electronic repair. It is an efficient tool for quickly discovering and tracking target signals on-site.

[0003] Existing signal detection devices have the following problems: 1. The contact surface of the detection is arc-shaped, making it difficult to make full contact and obtain a signal; 2. Most current equipment probes are single-sided, which cannot effectively detect in narrow holes or grooves; 3. Probe assembly is inconvenient, easily damaging the sensing components, and the assembly process is complicated. Utility Model Content

[0004] This application provides a signal detection device that can achieve multi-faceted bonding detection.

[0005] This application provides a signal detection device, including a device body, a connecting tube, and a probe; one end of the connecting tube is connected to the device body, and the other end is connected to the probe; the probe includes a probe housing, a positioning element, and a sensing element; the probe housing is connected to the connecting tube, and the probe housing is provided with a first detection contact plane; both the positioning element and the sensing element are disposed inside the probe housing, the positioning element is used to position the sensing element inside the probe housing, and the positioning element is provided with a second detection contact plane perpendicular to the first detection contact plane; the sensing element includes a horizontal portion and a vertical portion connected to form an L-shape, the horizontal portion is parallel to the first detection contact plane, the vertical portion is parallel to the second detection contact plane, and the sensing element is electrically connected to the device body for sensing a signal source.

[0006] Preferably, the device body includes a housing and a circuit board; the two housings are detachably connected to form an installation space; the circuit board is disposed in the installation space and is electrically connected to the sensing element via a flexible cable; both housings are provided with a semi-circular sleeve, and the semi-circular sleeves of the two housings are joined to form a first insertion tube, one end of the connecting tube is coaxially inserted into the first insertion tube, and the connecting tube extends into the installation space; the flexible cable passes through the connecting tube.

[0007] Preferably, a clamping element is detachably installed within the installation space, and the clamping element is pressed against the outer circumference of the connecting pipe.

[0008] Preferably, the connecting pipe is configured as a flexible rubber tube.

[0009] Preferably, the probe housing includes a first arched shell and a first straight plate; the first straight plate is connected to the bottom of the first arched shell so that the cross-sectional shape of the probe housing forms a closed arched structure; the outer side of the first straight plate is configured as a first detection contact plane; a second insertion tube is provided at the first end of the first arched shell, and the second insertion tube is coaxially sleeved on the connecting tube; the second end of the first arched shell is configured as an open end.

[0010] Preferably, the positioning element includes a second arched shell, a second straight plate, and a first partition plate; the outer arc surface of the second arched shell slides in contact with the inner circumferential surface of the first arched shell; the second straight plate is disposed on the end face of the second arched shell, and the second straight plate is configured as a second detection contact plane away from the front end face of the second arched shell; the first partition plate is disposed on the inner circumference of the second arched shell, and a first limiting space is formed between the second straight plate and the first partition plate in the length direction of the second arched shell, and the vertical part of the sensing element is disposed in the first limiting space; the horizontal part of the sensing element is disposed between the second arched shell and the first straight plate.

[0011] Preferably, the bottom surface of the second straight plate is in contact with the first straight plate, and there is a predetermined gap H between the bottom surface of the second arched shell and the first straight plate, so that a second limiting space is formed between the bottom surface of the second arched shell and the first straight plate, and the horizontal part of the sensing element is disposed in the second limiting space.

[0012] The second arched shell contains multiple second partitions, which are spaced apart along the length of the second arched shell. The bottom surface of the second partition is used to support the horizontal part of the sensing element. Both the first and second partitions are provided with wire grooves.

[0013] Preferably, the distance D2 between the first detection contact plane and the horizontal portion of the sensor is between 1 mm and 10 mm; the distance D1 between the second detection contact plane and the vertical portion of the sensor is between 1 mm and 10 mm.

[0014] Preferably, the sensing element includes a substrate and an induction coil for detecting a signal source. The substrate is bent to form an L-shaped structure, and the induction coil is disposed on the horizontal and vertical portions. The induction coil is electrically connected to the device body.

[0015] The signal detection device of this application has at least the following beneficial effects:

[0016] The probe housing and positioning component of this application are respectively provided with a first detection contact plane and a second detection contact plane that are perpendicular to each other. The sensing component is configured in an L-shaped structure. The horizontal and vertical parts of the L-shaped structure are parallel to the first and second detection contact planes, respectively. This allows the probe to detect signal sources from both the front and the side. This application eliminates the traditional arc-shaped contact surface. The two detection contact planes can fit against the position to be detected to improve detection accuracy. It is also designed for multi-faceted detection, which can fit against the front and the side in narrow spaces, providing high flexibility. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 This is a schematic diagram of the signal detection device of this application;

[0019] Figure 2 yes Figure 1 An explosive schematic diagram of the main body of the device;

[0020] Figure 3 yes Figure 1 Cross-sectional view of the main body of the device;

[0021] Figure 4 yes Figure 1 An exploded view of the probe (showing the flexible cable);

[0022] Figure 5 yes Figure 4 Axonometric view of the center positioning component;

[0023] Figure 6 yes Figure 1 A schematic diagram of the radial cross-section of the probe;

[0024] Figure 7 yes Figure 1 Vertical cross-sectional view of the probe;

[0025] Figure 8 This is a structural diagram of the sensing element and the flexible cable;

[0026] The annotations in the attached figures are explained as follows:

[0027] 100. Device body; 110. Housing; 111. Semi-arc sleeve; 112. First insertion pipe; 120. Circuit board; 130. Flexible cable; 140. Clamping component; 150. Button; 160. Dust plug;

[0028] 200. Connecting pipe;

[0029] 300, Probe; 310, Probe housing; 311, First arched shell; 312, First straight plate; 3121, First detection contact surface; 313, Second insertion tube; 320, Positioning element; 321, Second arched shell; 322, Second straight plate; 3221, Second detection contact surface; 323, First partition; 324, Second partition; 320a, Through-line groove; 330, Sensing element; 330a, Horizontal part; 330b, Vertical part; 331, Base; 332, Induction coil;

[0030] P1, first limiting space; P2, second limiting space. Detailed Implementation

[0031] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] like Figure 1 As shown, this embodiment discloses a signal detection device, which includes a device body 100, a connecting tube 200, and a probe 300, as detailed below:

[0034] like Figure 2As shown, the device body 100 includes a housing 110 and a circuit board 120; there are two housings 110, which are detachably connected by screws. After the two housings 110 are connected together, they can form an installation space inside each other; the circuit board 120 is set in the installation space by screws. The circuit board 120 can receive the signal detected by the probe 300. Its specific structural form can be referred to the prior art.

[0035] Furthermore, such as Figure 2 and Figure 3 As shown, the front ends of the two housings 110 are provided with semi-circular sleeves 111. The semi-circular sleeves 111 of the two housings 110 can be joined to form a complete circular structure. This circular structure is configured as a first insertion tube 112. One end of the first insertion tube 112 is connected to the installation space for installing the connecting tube 200.

[0036] In some preferred embodiments, such as Figure 2 and Figure 3 As shown, the device body 100 also includes a button 150 and a dust plug 160; a button hole is provided on a housing 110, the button 150 passes through the button hole, the button 150 is connected to the circuit board 120, and the button 150 is used to operate the signal detection device; the dust plug 160 is provided at the rear end of the two housings 110.

[0037] like Figure 2 and Figure 3 As shown, the connecting tube 200 is configured as a circular hollow tube. One end of the connecting tube 200 is coaxially inserted into the first insertion tube 112, and the connecting tube 200 extends into the installation space. In this embodiment, a clamping member 140 is provided in the installation space. The clamping member 140 is connected to the housing 110 by screws. The clamping member 140 is provided with a U-shaped clamping groove, which clamps onto the outer circumference of the connecting tube 200, thereby ensuring that one end of the connecting tube 200 is stably installed in the installation space. The other end of the connecting tube 200 is connected to the probe 300. The connecting tube 200 is configured as a flexible rubber tube, that is, the material of the connecting tube 200 is rubber. The connecting tube 200 can be freely bent, thereby allowing free adjustment of the position and angle of the probe 300 so that the probe 300 fits comfortably against the probed area.

[0038] like Figure 4As shown, the probe 300 includes a probe housing 310, a positioning element 320, and a sensing element 330. The probe housing 310 is provided with a first detection contact plane 3121, and the positioning element 320 is provided with a second detection contact plane 3221. The first detection contact plane 3121 and the second detection contact plane 3221 are perpendicular to each other. During detection, either the first detection contact plane 3121 or the second detection contact plane 3221 can be attached to the part to be measured to realize the detection of the signal source. The sensing element 330 includes a horizontal portion 330a and a vertical portion 330b connected to form an L-shape. The horizontal portion 330a and the vertical portion 330b are parallel to the first detection contact plane 3121 and the second detection contact plane 3221, respectively, and can detect signal sources directly in front of the first detection contact plane 3121 or the second detection contact plane 3221.

[0039] like Figure 4 As shown, the probe housing 310 includes a first arched shell 311 and a first straight plate 312. The cross-sectional shape of the first arched shell 311 is U-shaped (i.e., arched). The first straight plate 312 is disposed on the lower surface of the first arched shell 311, so that the radial cross-sectional shape of the probe housing 310 is a closed arch. In some preferred embodiments, the first arched shell 311 and the first straight plate 312 are integrally formed. One surface of the first straight plate 312 opposite to the first arched shell 311 is configured as a first detection contact plane 3121. The first arched shell 311 has a second insertion tube 313 at its first end along its length. The second insertion tube 313 is coaxially sleeved on the outer circumference of the connecting tube 200 so that the probe shell 310 is stably connected to the connecting tube 200. The second end of the first arched shell 311 is configured as an open end. During assembly, the positioning member 320 and the sensing member 330 can slide into the first arched shell 311 from the second end along the length of the first arched shell 311. The assembly method is simple and quick, which can solve the problems of inconvenient assembly and easy damage of the probe 300.

[0040] In this embodiment, the combination of the first arched shell 311 and the first straight plate 312 makes the outer circumference shape of the probe shell 310 a U-shaped surface plus a flat surface (i.e., the first detection contact plane 3121). The U-shaped surface facilitates the rotation of the probe 300 in a confined space to change the detection direction. The flat surface can fit against the part to be detected. On the other hand, the operator can quickly identify the surface as the detection contact surface by the flat feature of the flat surface. Especially in a confined and dark space, the feel of pressing the flat surface on the part to be detected is different from that of pressing the U-shaped surface or other irregularly shaped surfaces on the part to be detected. Therefore, the operator can know the orientation of the detection contact surface in order to operate the probe 300.

[0041] like Figure 4As shown, the positioning member 320 is disposed between the first arched shell 311 and the sensing member 330. On the one hand, it is used to install the sensing member 330, and on the other hand, it is used to position the sensing member 330 inside the first arched shell 311 to prevent the position of the sensing member 330 inside the first arched shell 311 from shifting.

[0042] like Figure 5 As shown, the positioning component 320 includes a second arched shell 321, a second straight plate 322, and a first partition plate 323, as detailed below:

[0043] like Figure 6 As shown, the shape of the second arched shell 321 is similar to that of the first arched shell 311, and its bending arc is the same as that of the first arched shell 311. However, the size of the second arched shell 321 is smaller than that of the first arched shell 311, so that the second arched shell 321 can slide into the first arched shell 311. The outer circumference of the second arched shell 321 fits against the inner circumference of the first arched shell 311, and the two can slide relative to each other along the length of the first arched shell 311. After the second arched shell 321 slides into the first arched shell 311, the inner circumference of the first arched shell 311 exerts a certain radial compressive force on the outer circumference of the second arched shell 321, preventing the second arched shell 321 from freely sliding out of the first arched shell 311 during the detection process. The second straight plate 322 is connected to the front end face of the second arched shell 321. In some preferred embodiments, the second arched shell 321 and the second straight plate 322 are integrally formed.

[0044] like Figure 7 As shown, the second straight plate 322 is perpendicular to the length direction of the second arched shell 321. Along the length direction of the second arched shell 321, one surface of the second straight plate 322 facing away from the second arched shell 321 is configured as a second detection contact plane 3221, which is perpendicular to the first detection contact plane 3121. A first partition 323 is connected to the inner circumference of the second arched shell 321 and is parallel to the second straight plate 322. Along the length direction of the second arched shell 321, the second straight plate 322 and the first partition 323 are spaced apart, forming a first limiting space P1 between them. The vertical portion 330b of the sensing element 330 is disposed within the first limiting space P1, and this vertical portion 330b is parallel to either the second straight plate 322 or the first partition 323. The horizontal portion 330a of the sensing element 330 is disposed between the second arched shell 321 and the first straight plate 312.

[0045] In this embodiment, the second straight plate 322 at the front end of the positioning member 320 can be fitted to the part to be detected to achieve contact detection. When assembling the probe 300, the sensing element 330 is first assembled with the positioning member 320, and then the positioning member 320 and the sensing element 330 are slidably pushed into the first arched shell 311 together. Its working principle is similar to a drawer-type pull-out method, which is quick to assemble. It should be noted that the second straight plate 322 at the front end of the second arched shell 321 can protrude from or at least be flush with the front end surface of the first arched shell 311, thereby facilitating the contact between the second straight plate 322 and the part to be detected.

[0046] like Figure 6 and Figure 7 As shown, the bottom surface of the second straight plate 322 extends away from the bottom surface of the second arched shell 321, and the bottom surface of the second straight plate 322 is in contact with the inner surface of the first straight plate 312. There is a predetermined gap H between the bottom surface of the second arched shell 321 and the inner surface of the first straight plate 312. Due to the existence of the predetermined gap H, a second limiting space P2 is formed between the bottom surface of the second arched shell 321 and the first straight plate 312. The horizontal portion 330a of the sensing element 330 is disposed in the second limiting space P2, wherein the horizontal portion 330a of the sensing element 330 is arranged parallel to the first straight plate 312.

[0047] In this embodiment, the vertical portion 330b and the horizontal portion 330a of the sensing element 330 are installed and limited by the first limiting space P1 and the second limiting space P2, respectively, to ensure that the position of the sensing element 330 is stable during the detection process.

[0048] like Figure 7 As shown, in some preferred embodiments, the positioning member 320 further includes a plurality of second partitions 324 (three are shown in this embodiment). The plurality of second partitions 324 are spaced apart along the length direction of the second arched shell 321 on the inner circumference of the second arched shell 321. The lower surface of the second partitions 324 can be used to support the horizontal portion 330a of the sensing member 330. It should be noted that the sensing member 330 is very thin and easily deformed. Therefore, it is necessary to provide a plurality of second partitions 324 to support its horizontal portion 330a. Especially when the probe 300 needs to be rotated, the horizontal portion 330a of the sensing member 330 may be above and the second arched shell 321 may be below. The plurality of second partitions 324 can support the sensing member 330 at multiple positions to prevent it from shifting and deforming.

[0049] In this embodiment, the first partition 323 and the second partition 324 are identical in shape and size. Both the first partition 323 and the second partition 324 are provided with a wire groove 320a, which facilitates the flexible cable 130 to pass through multiple partitions in sequence and be electrically connected to the vertical portion 330b of the sensing element 330. At the same time, the wire groove 320a can also restrict the position of the flexible cable 130.

[0050] In this embodiment, in the length direction of the second arched shell 321, the width of the first limiting space P1 is 2mm to 12mm, for example, 2mm, 5mm, or 8mm; in the thickness direction of the first straight plate 312, the width of the second limiting space P2 is 2mm to 12mm, for example, 2mm, 5mm, or 8mm.

[0051] like Figure 7 As shown, when the vertical portion 330b of the sensor 330 is installed in the first limiting space P1, the distance D1 between the first detection contact plane 3121 and the vertical portion 330b (distance in the length direction of the second arched shell 321) is between 1mm and 10mm, for example, between 2mm and 4mm. Since the width design of the first limiting space P1 allows for a certain amount of movement of the vertical portion 330b of the sensor 330, the distance D1 between the first detection contact plane 3121 and the vertical portion 330b is a floating value, but this floating value is preferably between 2mm and 4mm, so that the vertical portion 330b is as close as possible to the first detection contact plane 3121, thereby improving the detection effect. Similarly, when the horizontal portion 330a of the sensor 330 is installed in the second limiting space P2, the distance D2 between the second detection contact plane 3221 and the horizontal portion 330a (distance in the thickness direction of the first straight plate 312) is between 1mm and 10mm, for example, between 2mm and 4mm.

[0052] like Figure 8 As shown, the sensor 330 is used to sense a signal source and is configured in an L-shape. Specifically, the sensor 330 includes a horizontal portion 330a and a vertical portion 330b, which are connected to form an L-shaped structure. The horizontal portion 330a is parallel to the first detection contact plane 3121 on the first straight plate 312, and the vertical portion 330b is parallel to the second detection contact plane 3221 on the second straight plate 322. The sensor 330 is relatively thin, typically between 1 mm and 3 mm thick.

[0053] like Figure 8As shown, in this embodiment, the sensing element 330 is configured as an existing flexible circuit board, on which an induction coil 332 is provided. The flexible circuit board is bent at a 90-degree angle to form an L-shaped structure including the horizontal portion 330a and the vertical portion 330b. Specifically, the sensing element 330 includes a substrate 331 and an induction coil 332 for detecting signal sources. The substrate 331 is generally made of polyimide, which has good bending performance, so that the sensing element 330 can be bent into an L-shaped structure. A copper-clad layer is arranged on the surface of the substrate 331. The copper-clad layer is processed into metal circuits through existing etching, engraving and other processes. The induction coil 332 is formed on the surface of the substrate 331 by the metal circuits. It should be noted that when the substrate 331 is bent, the induction coil 332 formed on the substrate 331 is also bent. At this time, both the vertical part 330b and the horizontal part 330a of the substrate 331 have induction coils 332. The induction coils 332 are electrically connected to the end of the induction coil 332 on the vertical part 330b through a flexible cable 130.

[0054] The assembly process of the signal detection device in this embodiment is as follows:

[0055] 1. Install the circuit board 120 inside a housing 110, then install the connecting tube 200 inside the semi-circular sleeve 111 of the housing 110, and use the clamping piece 140 to clamp one end of the connecting tube 200. Connect one end of the flexible cable 130 to the circuit board 120 and pass it out from the connecting tube 200. Then connect another housing 110. At this time, the device body 100 is assembled.

[0056] 2. The second insertion tube 313 at the rear end of the probe housing 310 is inserted into the end of the connecting tube 200 away from the device body 100. The flexible cable 130 passes through the probe housing 310 and is connected to the sensing element 330. It should be noted that the flexible cable 130 has sufficient length to allow it to pass through the probe housing 310 and be electrically connected to the sensing coil 332 of the sensing element 330.

[0057] 3. Insert the vertical part 330b of the sensing element 330 into the first limiting space P1 of the positioning element 320, and then slide the positioning element 320 and the sensing element 330 together into the probe housing 310 along the length direction of the probe housing 310. At this time, the probe 300 is assembled.

[0058] The working principle of the signal detection device in this embodiment is as follows:

[0059] 1. The staff member holds the main body 100 of the signal detection device and inserts the probe 300 into the predetermined detection position;

[0060] 2. Depending on the location to be detected, the first detection contact plane 3121 on the side of the probe 300 is attached to the part to be detected, or the second detection contact plane 3221 on the front of the probe 300 is attached to the part to be detected.

[0061] Third, the sensing element 330 senses the part to be detected. If a signal source is present, the induction coil 332 generates a sensing signal and transmits it to the circuit board 120 of the device body 100 through the flexible cable 130. The corresponding signal source information can be displayed on the display screen that is electrically connected to the circuit board 120.

[0062] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A signal detection device, characterized in that, include: Device body (100); The connecting tube (200) is connected at one end to the device body (100) and at the other end to the probe (300); The probe (300) includes a probe housing (310), a positioning element (320), and a sensing element (330); the probe housing (310) is connected to the connecting pipe (200), and the probe housing (310) is provided with a first detection contact surface (3121); the positioning element (320) and the sensing element (330) are both disposed inside the probe housing (310), and the positioning element (320) is used to position the sensing element (330) inside the probe housing (310). A second detection contact plane (3221) perpendicular to the first detection contact plane (3121) is provided; the sensing element (330) includes a horizontal portion (330a) and a vertical portion (330b) connected to form an L-shape, the horizontal portion (330a) being parallel to the first detection contact plane (3121), the vertical portion (330b) being parallel to the second detection contact plane (3221), and the sensing element (330) being electrically connected to the device body (100) for sensing signal sources.

2. The signal detection device according to claim 1, characterized in that, The device body (100) includes a housing (110) and a circuit board (120); the two housings (110) are detachably connected to form an installation space; the circuit board (120) is located in the installation space and is electrically connected to the sensing element (330) via a flexible cable (130); both housings (110) are provided with a semi-arc sleeve (111), and the semi-arc sleeves (111) of the two housings (110) are joined to form a first insertion tube (112), one end of the connecting tube (200) is coaxially inserted into the first insertion tube (112), and the connecting tube (200) extends into the installation space; the flexible cable (130) passes through the connecting tube (200).

3. The signal detection device according to claim 2, characterized in that, A clamping element (140) is detachably installed in the installation space and is pressed against the outer circumference of the connecting pipe (200).

4. The signal detection device according to claim 1, characterized in that, The connecting pipe (200) is configured as a flexible rubber tube.

5. The signal detection device according to claim 1, characterized in that, The probe housing (310) includes a first arched shell (311) and a first straight plate (312); the first straight plate (312) is connected to the bottom of the first arched shell (311) so that the cross-sectional shape of the probe housing (310) forms a closed arched structure; the outer side of the first straight plate (312) is configured as a first detection contact plane (3121); a second insertion tube (313) is provided at the first end of the first arched shell (311), and the second insertion tube (313) is coaxially sleeved on the connecting tube (200); the second end of the first arched shell (311) is configured as an open end.

6. The signal detection device according to claim 5, characterized in that, The positioning component (320) includes a second arched shell (321), a second straight plate (322), and a first partition plate (323); the outer arc surface of the second arched shell (321) slides in contact with the inner circumferential surface of the first arched shell (311); the second straight plate (322) is disposed on the end face of the second arched shell (321), and the front end face of the second straight plate (322) facing away from the second arched shell (321) is configured as a second detection contact plane (3221); the first partition plate (321) 23) On the inner circumference of the second arched shell (321), a first limiting space (P1) is formed between the second straight plate (322) and the first partition plate (323) in the length direction of the second arched shell (321), and the vertical part (330b) of the sensing element (330) is disposed in the first limiting space (P1); the horizontal part (330a) of the sensing element (330) is disposed between the second arched shell (321) and the first straight plate (312).

7. The signal detection device according to claim 6, characterized in that, The bottom surface of the second straight plate (322) contacts the first straight plate (312), and there is a predetermined gap (H) between the bottom surface of the second arched shell (321) and the first straight plate (312) so that a second limiting space (P2) is formed between the bottom surface of the second arched shell (321) and the first straight plate (312), and the horizontal part (330a) of the sensing element (330) is disposed in the second limiting space (P2).

8. The signal detection device according to claim 7, characterized in that, The second arched shell (321) is provided with a plurality of second partitions (324), which are spaced apart along the length of the second arched shell (321); the bottom surface of the second partition (324) is used to support the horizontal part (330a) of the sensing element (330); both the first partition (323) and the second partition (324) are provided with wire grooves (320a).

9. The signal detection device according to any one of claims 1 to 8, characterized in that, The distance between the first detection contact plane (3121) and the horizontal portion (330a) of the sensing element (330) is between 1 mm and 10 mm; the distance between the second detection contact plane (3221) and the vertical portion (330b) of the sensing element (330) is between 1 mm and 10 mm.

10. The signal detection device according to any one of claims 1 to 8, characterized in that, The sensing element (330) includes a substrate (331) and an induction coil (332) for detecting a signal source. The substrate (331) is bent to form an L-shaped structure. The induction coil (332) is disposed on the horizontal part (330a) and the vertical part (330b). The induction coil (332) is electrically connected to the device body (100).

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