An insulating anti-interference impact sensor

Abstract

The utility model relates to sensor technical field, a kind of insulation anti-interference impact sensor, including shell, the one end of shell is fixedly installed with transition joint, the outside of transition joint is detachably installed with wiring sleeve by thread, the inside of wiring sleeve is installed with cable, the inside of shell is provided with sensitive element;The inside of shell is installed with insulation assembly, the sensitive element is installed in the inside of shell by insulation assembly, the insulation assembly plays the role of electrical insulation, avoid charge leakage;The other end of shell is installed with insulation screw;The utility model is provided with insulation assembly and insulation screw, prevent sensor and installation surface direct contact, sensitive element and shell direct contact, effectively reduce the interference possibly generated by charge leakage to sensor signal, ensure the stability and accuracy of sensor signal.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to an insulating anti-interference impact sensor. Background Technology

[0002] Insulated and interference-resistant impact sensors, as core sensing devices for detecting impact signals, are widely used in critical fields such as power equipment monitoring, industrial machinery vibration detection, and aerospace component impact testing. Their working principle involves a sensitive element sensing external impact signals and converting them into electrical signals, which are then transmitted via cables to subsequent processing units. Therefore, the stability, accuracy, and interference resistance of the sensitive element's output signal directly determine the measurement accuracy and reliability of the entire detection system. In these application scenarios, sensors are often in complex electromagnetic environments, susceptible to interference from stray currents, electrostatic induction, and charge leakage. Direct contact with mounting surfaces, housings, and other structures can also cause signal distortion. If the sensor's insulation and interference resistance are insufficient, noise, drift, or even distortion in the output signal can occur, potentially leading to serious problems such as equipment misjudgment and failure of fault warnings.

[0003] Existing impact sensors have significant deficiencies in insulation and anti-interference design, making it difficult to meet the requirements of high-precision detection scenarios. Firstly, most sensors lack systematic insulation design, with the sensitive element directly installed inside the housing. The bracket is in direct contact with the inner wall of the housing, which can easily lead to charge leakage, causing interference to the electrical signal output by the sensitive element and significantly reducing signal stability and accuracy. At the same time, the sensor is often directly and rigidly connected to the mounting surface, making it easy for static electricity on the housing or stray currents on the mounting surface to be directly conducted to the sensitive element, further exacerbating the signal interference problem.

[0004] Secondly, although some sensors attempt to insulate themselves using simple insulating components, their structural design is flawed, leaving loopholes in insulation protection. For example, simply laying an insulating sheet at the bottom of the sensitive element without overall insulation of the inner surface of the housing allows static electricity on the inner wall of the housing to indirectly affect the sensitive element through air gaps or other components. Furthermore, the transition connector, a crucial component connecting the cable and the sensitive element, lacks a reliable insulating seal between its internal positive and negative pins and the connector housing. Stray currents from the external environment or static electricity from the housing can easily be conducted to the sensitive element through the transition connector, resulting in compromised signal purity.

[0005] In view of the shortcomings of existing impact sensors, such as unsystematic insulation design, weak anti-interference ability, and poor signal stability, there is an urgent need for an insulating anti-interference impact sensor with multiple insulation protection structures that can effectively block charge leakage and external interference conduction, so as to ensure the purity, stability and accuracy of the output signal of the sensitive element and meet the needs of high-precision impact detection in various fields. Utility Model Content

[0006] (a) Technical problems to be solved In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide an insulating anti-interference impact sensor, which effectively solves the insulation problems of existing sensors that do not have multiple insulation protections and cannot effectively block charge leakage and external interference conduction.

[0007] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: An insulating anti-interference impact sensor includes a housing, a transition connector fixedly mounted at one end of the housing, a wiring sleeve detachably mounted on the outside of the transition connector via threads, a cable installed inside the wiring sleeve, and a sensitive element disposed inside the housing. An insulating component is installed inside the housing, and the sensitive element is installed inside the housing through the insulating component. The insulating component serves to provide electrical insulation and prevent charge leakage. An insulating screw is installed at the other end of the outer casing.

[0008] Preferably, the insulating component includes an insulating pad and an insulating layer; The insulating pad is installed at the inner bottom of the housing, and the sensitive element is installed at the upper part of the insulating pad; The insulating layer is sprayed onto the inner surface of the outer casing, and the insulating layer serves to provide insulation, cushioning, and waterproofing.

[0009] Preferably, the inner bottom of the outer casing is provided with a recessed groove, and the recessed groove is interference-fitted with the insulating gasket.

[0010] Preferably, one end of the insulating screw is fixedly connected to a square shoulder; The outer casing has a square groove of the same size as the square shoulder on the side near the insulating screw.

[0011] Preferably, the transition connector includes a transition connector housing, an insulating sealing plate, and positive and negative pins. The insulating sealing plate is installed inside the transition connector housing, and the positive and negative pins are installed inside the insulating sealing plate and penetrate through the insulating sealing plate.

[0012] Preferably, the sensitive element includes a bracket, a piezoelectric ceramic, and a mass block, wherein the bracket is mounted on an insulating pad, the piezoelectric ceramic is mounted on the outside of the bracket, and the mass block is mounted on the outer surface of the piezoelectric ceramic; The cable is electrically connected to the piezoelectric ceramic and the mass block via positive and negative pins, respectively.

[0013] Preferably, the insulating layer is made of silicone rubber.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides an insulating anti-interference impact sensor, which has the following beneficial effects: This utility model's insulated anti-interference impact sensor, through the setting of insulating components and insulating screws, prevents direct contact between the sensor and the mounting surface, initially placing the sensor in an insulating state. The insulating layer provides the sensor with multiple functions such as good insulation, buffering, and waterproofing. The insulating gasket prevents direct contact between the sensitive element's support and the outer shell during installation, further insulating the sensor and preventing charge leakage. This design effectively reduces the interference that charge leakage may cause to the sensor signal, ensuring the stability and accuracy of the sensor signal.

[0015] This utility model's insulating anti-interference impact sensor, through the installation of an insulating sealing plate, effectively establishes a good insulating state between the positive and negative pins and the transition connector housing, preventing stray currents from the external environment or static electricity on the housing from being conducted to the sensitive element through the transition connector. This measure greatly ensures the purity of the sensitive element's output signal, ensuring that it is not affected by external interference during operation and maintaining signal stability and accuracy. Attached Figure Description

[0016] Figure 1 This is a partial structural schematic diagram of the insulating anti-interference impact sensor of this utility model.

[0017] Figure 2 This is a partial cross-sectional view of the insulating anti-interference impact sensor of this utility model.

[0018] Figure 3 This is a partial exploded structural diagram of the insulating anti-interference impact sensor of this utility model.

[0019] Figure 4 This is a schematic diagram of the sensitive element structure of the insulating anti-interference impact sensor of this utility model.

[0020] Figure 5 This is a schematic diagram of the housing structure of the insulating anti-interference impact sensor of this utility model.

[0021] Figure 6 This is a schematic diagram of the transition joint structure of the insulating anti-interference impact sensor of this utility model.

[0022] In the diagram: 11. Outer shell; 111. Recessed groove; 112. Square groove; 12. Transition joint; 121. Transition joint housing; 122. Insulating sealing plate; 123. Positive and negative pins; 13. Wiring sleeve; 14. Cable; 15. Sensitive element; 151. Bracket; 152. Piezoelectric ceramic; 153. Mass block; 16. Insulating screw; 161. Square shoulder; 2. Insulating assembly; 21. Insulating gasket; 22. Insulating layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0026] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Example 1: This embodiment provides an insulating anti-interference impact sensor, which has the following technical features.

[0028] Please see Figure 1-6It includes a housing 11, a transition connector 12 is fixedly installed at one end of the housing 11, a wiring sleeve 13 is detachably installed on the outside of the transition connector 12 by means of threads, a cable 14 is installed inside the wiring sleeve 13, and a sensitive element 15 is provided inside the housing 11. An insulating component 2 is installed inside the housing 11. The sensitive element 15 is installed inside the housing 11 through the insulating component 2. The insulating component 2 serves to provide electrical insulation and prevent charge leakage. An insulating screw 16 is installed at the other end of the outer casing 11.

[0029] It should be noted that by setting the insulating component 2, an effective separation is formed between the sensing element 15 and the housing 11, avoiding direct contact between the sensing element 15 and the housing 11. This prevents charge leakage caused by direct contact, effectively reducing the interference that charge leakage may cause to the sensor signal, and ensuring the stability and accuracy of the sensor signal. The installation of the insulating component 2 not only improves the overall electrical performance of the device but also greatly enhances its reliability and service life in complex environments. The installation of the insulating screw 16 further enhances the sealing and insulation performance of the housing, ensuring that the entire device maintains good electrical insulation under various operating conditions.

[0030] In an optional embodiment, the insulating component 2 includes an insulating pad 21 and an insulating layer 22; An insulating pad 21 is installed at the bottom inner part of the housing 11, and a sensitive element 15 is installed at the top of the insulating pad 21; The insulating layer 22 is sprayed on the inner surface of the outer shell 11, and the insulating layer 22 serves to provide insulation, cushioning and waterproofing.

[0031] In an optional embodiment, a recess 111 is provided on the inner bottom of the housing 11, and the recess 111 is interference-fitted with the insulating gasket 21.

[0032] In an optional embodiment, the insulating layer 22 is made of silicone rubber.

[0033] It should be noted that during installation, the insulation layer 22 is first evenly applied to the inner surface of the outer casing 11. This step not only gives the outer casing 11 multiple functions such as insulation, cushioning, and waterproofing, but also lays a good foundation for subsequent use. During installation, adhesive is first applied to the inside of the recess 111. Then, the insulating gasket 21 is pressed into the recess 111. The interference fit between the insulating gasket 21 and the recess 111 ensures a more secure and stable installation of the insulating gasket 21 inside the outer casing 11, thereby ensuring that the entire device maintains excellent performance and reliability during long-term use.

[0034] In an optional embodiment, one end of the insulating screw 16 is fixedly connected to a square shoulder 161; The outer casing 11 has a square groove 112 of the same size as the square shoulder 161 on the side near the insulating screw 16.

[0035] It should be noted that during installation, an appropriate amount of adhesive is first evenly applied to the inner surface of the square groove 112. Then, the square shoulder 161 is accurately installed inside the square groove 112. In this way, the insulating screw 16 and the outer casing 11 are firmly connected together through the adhesive. This design not only greatly facilitates the installation of the sensor during later use, but also prevents the sensor from directly contacting the mounting surface during the initial stage, thus preventing interference with the sensor signal.

[0036] In an optional embodiment, the transition connector 12 includes a transition connector housing 121, an insulating sealing plate 122, and positive and negative pins 123. The insulating sealing plate 122 is installed inside the transition connector housing 121, and the positive and negative pins 123 are installed inside the insulating sealing plate 122 and pass through the insulating sealing plate 122.

[0037] It should be noted that the insulating sealing plate 122 effectively ensures good insulation between the positive and negative pins 123 and the transition connector housing 121. This design cleverly avoids any potential conductive paths between the pins and the housing, thus preventing stray currents from the external environment or static electricity on the housing from being conducted to the sensitive element 15 through the transition connector 12. This measure greatly ensures the purity of the output signal of the sensitive element 15, ensuring that it is not affected by external interference during operation and maintaining signal stability and accuracy.

[0038] In an optional embodiment, the sensing element 15 includes a bracket 151, a piezoelectric ceramic 152, and a mass block 153. The bracket 151 is mounted on an insulating pad 21, the piezoelectric ceramic 152 is mounted on the outside of the bracket 151, and the mass block 153 is mounted on the outer surface of the piezoelectric ceramic 152. Cable 14 is electrically connected to piezoelectric ceramic 152 and mass block 153 via positive and negative pins 123, respectively.

[0039] It should be noted that the two terminals of the positive and negative pins 123 are connected to the piezoelectric ceramic 152 and the mass block 153 respectively, thus forming a complete electrical signal transmission path. During installation, firstly, a layer of adhesive is evenly applied to the surface of the bracket 151, and then the piezoelectric ceramic 152 is installed on the bracket 151, ensuring it is firmly fixed. Next, another layer of adhesive is applied to the outer surface of the piezoelectric ceramic 152, and the mass block 153 is installed on the outside of the piezoelectric ceramic 152. Through this series of installation steps, the installation of the sensitive element 15 is finally completed, enabling it to achieve effective conversion of "impact-force-electric signal," thus playing an important role in practical applications.

[0040] Working principle: S1, firstly, apply a layer of glue evenly to the surface of the bracket 151, then install the piezoelectric ceramic 152 on the bracket 151, then apply another layer of glue to the outer surface of the piezoelectric ceramic 152, and install the mass block 153 on the outside of the piezoelectric ceramic 152, thus completing the installation of the sensitive element 15. S2, First, the insulating layer 22 is evenly applied to the inner surface of the outer shell 11, and glue is applied to the inside of the recess 111. Then, the insulating pad 21 is pressed into the inside of the recess 111 to complete the installation of the insulating component 2. S3, install the assembled sensitive element 15 bracket 151 on the insulating pad 21; S4. Connect the two terminals on one side of the positive and negative pins 123 of the transition connector 12 to the piezoelectric ceramic 152 and the mass block 153 respectively by wire, and then weld the transition connector 12 to one end of the housing 11 by laser welding to complete the installation of the transition connector 12.

[0041] S5. First, pass the cable 14 through the connector sleeve 13, then connect the cable 14 to the two terminals on the other side of the positive and negative pins 123, and finally install the connector sleeve 13 onto the housing 11 by thread to complete the sensor assembly. S6. Apply glue to the inside of the square groove 112 at the bottom of the housing 11, and install the square shoulder 161 on the upper part of the insulating screw 16 into the inside of the square groove 112, so that the square shoulder 161 and the square groove 112 are installed together, and the installation of the insulating screw 16 is completed.

[0042] An insulating anti-interference impact sensor, through the setting of insulating component 2 and insulating screw 16, prevents the sensor from direct contact with the mounting surface by the installation of insulating screw 16, initially putting the sensor in an insulating state. Through the setting of insulating layer 22, the sensor has multiple functions such as good insulation, buffering and waterproofing. Through the setting of insulating gasket 21, the support 151 of sensitive element 15 is prevented from directly contacting the housing 11 during installation, further putting the sensor in an insulating state and avoiding charge leakage. This design effectively reduces the interference that charge leakage may cause to the sensor signal, ensuring the stability and accuracy of the sensor signal.

[0043] An insulating anti-interference impact sensor, through the provision of an insulating sealing plate 122, effectively establishes a good insulating state between the positive and negative pins 123 and the transition connector housing 121, preventing stray currents from the external environment or static electricity on the housing from being conducted to the sensitive element 15 through the transition connector 12. This measure greatly ensures the purity of the output signal of the sensitive element 15, ensuring that it is not affected by external interference during operation and maintaining the stability and accuracy of the signal.

[0044] 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 one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An insulating anti-interference impact sensor, comprising a housing (11), wherein a transition connector (12) is fixedly mounted at one end of the housing (11), a wiring sleeve (13) is detachably mounted on the outside of the transition connector (12) via threads, a cable (14) is installed inside the wiring sleeve (13), and a sensitive element (15) is disposed inside the housing (11), characterized in that: An insulating component (2) is installed inside the housing (11), and the sensitive element (15) is installed inside the housing (11) through the insulating component (2). The insulating component (2) serves as electrical insulation to prevent charge leakage. An insulating screw (16) is installed at the other end of the outer casing (11).

2. The insulating anti-interference impact sensor according to claim 1, characterized in that, The insulating component (2) includes an insulating pad (21) and an insulating layer (22); The insulating pad (21) is installed at the inner bottom of the housing (11), and the sensitive element (15) is installed at the upper part of the insulating pad (21); The insulating layer (22) is sprayed on the inner surface of the outer shell (11), and the insulating layer (22) serves to provide insulation, cushioning and waterproofing.

3. The insulating anti-interference impact sensor according to claim 2, characterized in that, The inner bottom of the outer casing (11) is provided with a recess (111), and the recess (111) is interference-fitted with the insulating gasket (21).

4. The insulating anti-interference impact sensor according to claim 1, characterized in that, One end of the insulating screw (16) is fixedly connected to a square shoulder (161). The outer casing (11) has a square groove (112) of the same size as the square shoulder (161) on the side near the insulating screw (16).

5. An insulating anti-interference impact sensor according to claim 1, characterized in that, The transition connector (12) includes a transition connector housing (121), an insulating sealing plate (122), and positive and negative pins (123). The insulating sealing plate (122) is installed inside the transition connector housing (121), and the positive and negative pins (123) are installed inside the insulating sealing plate (122) and penetrate through the insulating sealing plate (122).

6. The insulating anti-interference impact sensor according to claim 5, characterized in that, The sensitive element (15) includes a bracket (151), a piezoelectric ceramic (152), and a mass block (153). The bracket (151) is mounted on an insulating pad (21), the piezoelectric ceramic (152) is mounted on the outside of the bracket (151), and the mass block (153) is mounted on the outer surface of the piezoelectric ceramic (152). The cable (14) is electrically connected to the piezoelectric ceramic (152) and the mass block (153) respectively through positive and negative pins (123).

7. An insulating anti-interference impact sensor according to claim 2, characterized in that, The insulating layer (22) is made of silicone rubber.

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