Pin ultrasonic sensor convenient for automatic production

Abstract

Disclosed in the present invention is a pin ultrasonic sensor convenient for automatic production, comprising: pins, wherein two pins are provided; a fixing member, wherein each pin is fixed in the fixing member by means of injection molding, and at least one clearance notch is formed on the fixing member on one side of the pin; isolating sleeves, wherein the isolating sleeves are arranged on the two ends of the fixing member; a housing, wherein a mounting cavity is formed in the housing; and a ceramic piece, wherein the ceramic piece on which a wire is welded is arranged in the mounting cavity, the isolating sleeves are arranged in the housing and used for positioning the fixing member, one end of the pin is connected to the wire, and the interior of the mounting cavity is sequentially filled with a foaming adhesive layer and a sealant layer. Since at least one clearance notch is formed on the fixing member on one side of the pin, a manipulator for welding the wire on the ceramic piece can pass through the clearance notch, thereby achieving automatic welding of the wire and the ceramic piece.

Description

A Pin Ultrasonic Sensor Easy to Automated Production Technical Field

[0001] The present invention relates to the technical field of ultrasonic sensors, and more particularly to a pin ultrasonic sensor that is easy to produce automatically. Background Art

[0002] Labor and material costs have increased, but the price of ultrasonic sensors has not increased at the same rate. Therefore, in order to maintain the competitiveness of enterprises, it is necessary to use automation and reduce the sensor assembly process. Therefore, how to reduce the structure of ultrasonic sensors to make them easier to assemble and adapt to automated production has become the research direction of technical personnel in this field. Summary of the Invention

[0003] The object of the present invention is to provide a pin ultrasonic sensor that is easy to produce automatically, in order to solve the technical problems existing in the background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A pin ultrasonic sensor that is easy to produce automatically comprises: a pin, the pin having two pins; a fixing piece, the pin being fixed in the fixing piece by injection molding; at least one avoidance notch being provided on the fixing piece on one side of the pin; an isolation sleeve, the isolation sleeve being provided at both ends of the fixing piece; a housing, a mounting cavity being provided in the housing; a ceramic sheet, the ceramic sheet for welding a wire being provided in the mounting cavity; the isolation sleeve being provided in the housing and used for positioning the fixing piece; one end of the pin being connected to the wire; and the mounting cavity being filled in sequence with a foaming rubber layer and a sealing rubber layer.

[0006] In some embodiments, two avoidance notches are provided on the fixing piece on one side of the pin needle; the two avoidance notches are symmetrically arranged, and the openings are opposite to each other.

[0007] In some embodiments, the isolation sleeve is connected to the fixing member by injection molding.

[0008] In some embodiments, the outer contour of the isolation sleeve is semicircular.

[0009] In some embodiments, a limiting groove adapted to the isolation sleeve is provided in the installation cavity, and the limiting groove is semicircular.

[0010] In some embodiments, the width of the pin at one end connected to the wire is larger than that at one end away from the wire.

[0011] In some embodiments, the housing is an aluminum housing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Since there is at least one avoidance gap on the fixing part on one side of the pin needle, the robot arm for welding the wire and the ceramic sheet can pass through the avoidance gap, thereby realizing automatic welding of the wire and the ceramic sheet.

[0014] 2. The width of the pin at the end connected to the wire is larger than that at the end away from the wire. The welding position of the wire and the ceramic can be adjusted according to the needs, thereby adjusting the size of the ceramic piece.

[0015] 3. The traditional ultrasonic sensor production process is complex, with many steps and high labor costs. This ultrasonic sensor can realize automation instead of manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of a pin ultrasonic sensor that is easy to produce automatically;

[0017] Figure 2 is a top view of a pin ultrasonic sensor that is easy to produce automatically;

[0018] FIG3 is a top view of the pin fixing member;

[0019] FIG4 is a left side view of the pin fixing member;

[0020] Figure 5 is a directivity distribution diagram. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0025] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or display that comprises a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or display.

[0026] The following will be described in detail with reference to Figures 1 to 5 , in conjunction with an embodiment of the present application, a Pin ultrasonic sensor that facilitates automated production. It should be noted that the following embodiments are merely used to explain the present application and do not constitute a limitation on the present application.

[0027] Example 1:

[0028] As shown in Figure 1-5, a pin needle ultrasonic sensor that is easy to produce automatically includes: a pin needle 800, a fixing member 202, an isolation sleeve 201, a housing 300, a ceramic sheet 400,

[0029] The pins have two ends, fixed to the fixture by injection molding. The pins are wider at the end connected to the wire 500 than at the end away from the wire. This facilitates welding to the wire connecting the ceramic sheet and also facilitates automated welding.

[0030] Optionally, the Pin needle fixing part 100 fixes the Pin and the fixing part by injection molding. The Pin needle has an upper part of 0.6x0.6mm square and a lower part of 1-4mm long and 1-4mm wide, which is convenient for welding the wire and the needle.

[0031] The fixing member 202 is made of high-performance plastic. At least one clearance notch is provided on the fixing member on one side of the pin. This clearance notch allows the robot for welding the wire and ceramic sheet to pass through, allowing the welding and assembly of the wire and ceramic sheet to be automated. This enables automated welding of the wire and ceramic sheet.

[0032] The isolation sleeve is provided at both ends of the fixing member; the isolation sleeve 201 is made of silicone or rubber, which can effectively block the resonance of the piezoelectric ceramic 400 and the aluminum shell 300 from being transmitted to the Pin needle fixing member 100, thereby preventing the tested machine board from being falsely detected at the ringing position.

[0033] The piezoelectric ceramic 400 and the aluminum shell 300 are bonded and fixed with epoxy glue. By applying a certain excitation voltage, ultrasonic waves with a certain sound pressure are generated. In this solution, a rectangular piezoelectric flanged ceramic is used as the vibration source.

[0034] An installation cavity is provided in the shell; a ceramic sheet for welding the wire is provided in the installation cavity; the isolation sleeve is provided for positioning the fixing part; one end of the Pin needle is connected to the wire; the wire is made of silver wire, with a thickness of 0.1-0.2 mm, and the bending shape of the wire 500 can withstand certain stress and current.

[0035] The height of the aluminum shell is 8-12mm, and the runway-shaped aluminum shell mounting cavity provides a diffusion angle for the ultrasonic sensor. This ultrasonic sensor has a lateral diffusion angle of 90-100deg at -6dB and a lateral diffusion angle of 45-55deg.

[0036] The mounting cavity is sequentially filled with a foam layer 600 and a sealant layer 700. The sound-absorbing device 600 absorbs the back-reflecting sound pressure from the piezoelectric ceramic and reduces the ceramic's vibration displacement. This filler is made of a foaming agent or sound-absorbing cotton. The potting compound 700 ensures the ultrasonic sensor's internal sealing and waterproofing. This compound is a two-component silicone with a hardness of 30-50 degrees Shore A, effectively suppressing vibration at the ultrasonic sensor's tail end.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A Pin ultrasonic sensor that is easy to produce automatically, characterized in that: include: Pin needles, the Pin needles have two; A fixing part, wherein the pin needle is fixed in the fixing part by injection molding; at least one avoidance notch is provided on the fixing part on one side of the pin needle; Isolation sleeves, the isolation sleeves are arranged at both ends of the fixing member; A housing, wherein a mounting cavity is provided in the housing; A ceramic sheet, wherein the ceramic sheet for welding the wires is arranged in the mounting cavity; The isolation sleeve is arranged in the housing and is used to position the fixing member; One end of the Pin needle is connected to the silk thread; The installation cavity is filled with a foaming adhesive layer and a sealing adhesive layer in sequence.

2. According to claim 1, a Pin ultrasonic sensor that is easy to produce automatically is characterized in that: Two avoidance notches are arranged on the fixing piece on one side of the pin needle; the two avoidance notches are symmetrically arranged, and the openings are opposite to each other.

3. A Pin ultrasonic sensor that is easy to produce automatically according to claim 2, characterized in that: The isolation sleeve is connected to the fixing member by injection molding.

4. The Pin ultrasonic sensor that is easy to produce automatically according to claim 3 is characterized in that: The outer contour of the isolation sleeve is semicircular.

5. The Pin ultrasonic sensor that is easy to produce automatically according to claim 3 is characterized in that: A limiting groove matched with the isolation sleeve is arranged in the installation cavity, and the limiting groove is semicircular.

6. The Pin ultrasonic sensor that is easy to produce automatically according to claim 1 is characterized in that: The width of the pin needle at one end connected to the silk thread is larger than that at one end away from the silk thread.

7. The Pin ultrasonic sensor that is easy to produce automatically according to claim 1 is characterized in that: The shell is an aluminum shell.

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