A vibrating wire type vibration sensor

Abstract

This utility model discloses a vibrating wire vibration sensor, belonging to the field of safety monitoring technology. It includes a housing, a vibrating rod, and a coil. One end of the vibrating rod is fixed to the inner wall of the housing, while the other end is suspended. The coil is located at the bottom of the inner cavity of the housing, below the suspended end of the vibrating rod, and tightly fitted to it. A cover is snapped onto the top of the housing to protect the vibrating rod and coil inside. By using the vibrating wire principle to replace traditional accelerometer chip measurement, not only is the cost reduced, but the inherent characteristics of the vibrating wire structure also improve the sensor's anti-interference capability, enabling stable operation in complex environments. This makes it more suitable for structural safety monitoring scenarios where cost and anti-interference performance are critical.

Description

Technical Field

[0001] This utility model relates to the field of safety monitoring technology, specifically a vibrating wire vibration sensor. Background Technology

[0002] In the field of safety monitoring, vibration sensors are commonly used monitoring devices. By measuring the vibration intensity generated when some equipment is in operation, the vibration spectrum of the equipment is obtained, thereby enabling the monitoring and assessment of the safety status of the equipment.

[0003] However, in the existing technology, vibration sensors generally use accelerometer chips as the sensitive element for measurement. However, accelerometer chips are expensive and have poor anti-interference capabilities. Their application is limited in some scenarios where cost and anti-interference capabilities are required. In order to solve the above-mentioned problems, an improved vibrating wire vibration sensor is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a vibrating wire vibration sensor that uses the vibrating wire principle to measure the vibration intensity of monitoring equipment, thereby reducing costs and improving anti-interference capabilities, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibrating wire vibration sensor, comprising a housing, a vibrating rod, and a coil, wherein one end of the vibrating rod is fixed to the inner wall of the housing, and the other end of the vibrating rod is suspended in the air;

[0006] The coil is located at the bottom of the inner cavity of the housing, and is positioned below the suspended end of the vibrating rod, and is in close contact with the vibrating rod.

[0007] Preferably, a cover is snapped onto the top of the housing, the cover being used to protect the vibrating rod and coil inside the housing.

[0008] Preferably, an aviation connector is installed at one end of the housing, and the aviation connector is electrically connected to the coil.

[0009] Preferably, a magnet is fixedly connected to the lower end face of the coil, and the magnet is attracted to the housing.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention provides a vibrating wire vibration sensor that uses the vibrating wire principle to replace the traditional accelerometer chip measurement. This not only reduces costs but also improves the sensor's anti-interference capability due to the inherent characteristics of the vibrating wire structure. It can work stably in complex environments and is more suitable for structural safety monitoring scenarios where cost and anti-interference performance are required.

[0012] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the vibrating wire vibration sensor of this utility model.

[0014] The following are the labels in the diagram: 1. Housing; 2. Vibrator; 3. Coil; 4. Cover; 5. Plug; 6. Magnet. Detailed Implementation

[0015] 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.

[0016] This utility model provides, for example Figure 1 The vibrating wire type vibration sensor shown includes a housing 1, a vibrating rod 2 and a coil 3. One end of the vibrating rod 2 is fixed to the inner wall of the housing 1, and the other end of the vibrating rod 2 is suspended.

[0017] The coil 3 is located at the bottom of the inner cavity of the housing 1, and the coil 3 is located below the suspended end of the vibrating rod 2, and is in close contact with the vibrating rod 2.

[0018] When the sensor is installed on the surface of the structure being measured, the vibration generated by the device being measured will be transmitted through the metal housing 1 to the vibrating rod 2 fixed on its inner wall. Due to the structural design of the vibrating rod 2 with one end fixed and the other end suspended, the vibration energy can efficiently excite the vibrating rod 2 to resonate, and the suspended end can respond freely with the vibration of the device, ensuring that the vibration signal is transmitted to the subsequent signal conversion component without significant attenuation.

[0019] The coil 3 at the bottom of the inner cavity of the housing 1 is located below the suspended end of the vibrating rod 2 and is in close contact with it. When the vibrating rod 2 reciprocates due to resonance, the vibration of its suspended end will directly act on the coil 3 in close contact. Combined with the magnet 6 fixed on the lower end face of the coil 3, the mechanical vibration of the vibrating rod 2 will change the relative position between the coil 3 and the magnet 6, causing the magnetic flux passing through the coil 3 to change periodically. Thus, based on the principle of electromagnetic induction, an induced electromotive force corresponding to the vibration frequency and amplitude is generated in the coil 3, realizing the conversion of the vibration physical signal into an electrical signal.

[0020] The top of the housing 1 is fitted with a cover 4, which is used to protect the vibrating rod 2 and coil 3 inside the housing 1.

[0021] The cover 4, which is snapped onto the top of the housing 1, can tightly cover the opening of the housing 1. During the operation of the sensor, it can effectively prevent external dust, moisture, impurities and other contaminants from entering the interior of the housing 1, thus avoiding the vibration transmission accuracy or electromagnetic conversion efficiency of the coil 3 due to the adhesion of external contaminants. At the same time, it can prevent external forces from directly impacting the internal components and causing structural damage, thus ensuring the long-term stable operation of the sensor.

[0022] One end of the housing 1 is equipped with a flight plug 5, which is electrically connected to the coil 3. The flight plug 5 is used to transmit electrical signals.

[0023] When coil 3 generates an electrical signal through electromagnetic induction, the aviation connector 5, which is electrically connected to coil 3, will stably output the electrical signal to an external data acquisition or processing device. The aviation connector 5 provides a reliable interface for electrical signal transmission, ensuring that the electrical signal after vibration conversion can be transmitted efficiently and without interference, which facilitates the subsequent obtaining of the vibration spectrum of the device under test through signal analysis, and realizes accurate measurement of the vibration intensity of the device.

[0024] A magnet 6 is fixedly connected to the lower end face of the coil 3. The magnet 6 is attracted to the housing 1, which is made of metal.

[0025] The magnet 6 on the lower end of the coil 3 is attracted to the metal housing 1. On the one hand, the magnetic force firmly fixes the coil 3 to the bottom of the inner cavity of the housing 1, ensuring that the tight fit between the coil 3 and the suspended end of the vibrator 2 does not loosen with vibration, thus ensuring the stability of the magnetic flux change. On the other hand, the metal housing 1 and the magnet 6 form a stable magnetic field environment, reducing external magnetic field interference, improving the signal-to-noise ratio of the induced electromotive force of the coil 3, and thus improving the accuracy of electrical signal conversion.

[0026] In practical use, when this vibrating wire vibration sensor is put into use, it is first installed on the surface of the device being tested. The metal housing 1 transmits the vibration generated by the device to the vibrating rod 2 fixed on the inner wall. Due to the design of one end of the vibrating rod 2 being fixed and the other end being suspended, the vibration energy can efficiently excite the vibrating rod 2 to resonate. The suspended end responds freely with the vibration of the device, ensuring that the vibration signal is transmitted without significant attenuation. At this time, the coil 3, which is located below the suspended end of the vibrating rod 2 and is in close contact with it (the magnet 6 fixed on its lower end face is attracted to the metal housing 1), both stabilizes the position of the coil 3 through magnetic force and forms a stable magnetic field with the metal housing 1. (To reduce external interference), the reciprocating motion of the vibrating rod 2 changes the magnetic flux passing through the coil 3, generating an induced electromotive force corresponding to the vibration frequency and amplitude based on the principle of electromagnetic induction, thus realizing the conversion of the vibration physical signal into an electrical signal. The cover 4, which is snapped onto the top of the housing 1, tightly covers the opening, effectively preventing dust, moisture, etc. from entering, avoiding contamination of internal components or external impact, and ensuring stable operation. Finally, the connector 5, which is electrically connected to the coil 3, stably transmits the electrical signal to the external data acquisition or processing equipment. After analysis, the vibration spectrum of the tested equipment is obtained, realizing the accurate measurement of the vibration intensity of the equipment.

[0027] 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. A vibrating wire vibration sensor, comprising a housing (1), a vibrating rod (2), and a coil (3), characterized in that: One end of the vibrating rod (2) is fixed to the inner wall of the housing (1), and the other end of the vibrating rod (2) is suspended in the air; The coil (3) is located at the bottom of the inner cavity of the housing (1), and the coil (3) is located below the suspended end of the vibrating rod (2) and is closely attached to the vibrating rod (2).

2. The vibrating wire vibration sensor according to claim 1, characterized in that: The top of the housing (1) is fitted with a cover (4), which is used to protect the vibrating rod (2) and coil (3) inside the housing (1).

3. A vibrating wire vibration sensor according to claim 2, characterized in that: One end of the housing (1) is equipped with a flight plug (5), which is electrically connected to the coil (3).

4. A vibrating wire vibration sensor according to claim 3, characterized in that: A magnet (6) is fixedly connected to the lower end face of the coil (3), and the magnet (6) is attracted to the housing (1).

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