Microwave single-point displacement sensor

Abstract

The utility model provides a microwave single-point displacement sensor. The microwave single-point displacement sensor comprises a sensor shell, an auxiliary positioning module, a beam focusing module, a sensor circuit module and a microwave antenna module, the sensor circuit module is installed in the sensor shell, and the microwave antenna module is integrated on the sensor circuit module, faces one side of the sensor shell and is used for receiving and transmitting microwave signals; the auxiliary positioning module is installed on one side of the sensor shell and used for visually positioning a measuring point, and the beam focusing module is installed on one side of the sensor shell, covers the microwave antenna module and is used for focusing and enhancing microwave signals sent by the microwave antenna module. According to the utility model, the focusing and enhancement of microwave signals are realized through the wave beam focusing module, and the technical problems of high cost, poor portability, large size and power consumption, high test environment requirement, limited application range and the like of the existing displacement sensor are solved; therefore, high-precision measurement of single-point displacement is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to displacement measuring instrument technical field, specifically, relate to a kind of microwave single-point displacement sensor. BACKGROUND

[0002] Displacement measurement refers to the technology for detecting the relative movement of an object, which plays an important role in engineering manufacturing, building measurement and other fields. According to the sensing type, it can be divided into two categories: contact displacement sensors and non-contact displacement sensors. Among them, the contact displacement sensor is mainly composed of an acceleration sensor, which is widely used. However, the non-contact displacement sensor has obvious advantages in terms of installation convenience and environmental adaptability, such as laser displacement sensor. In practical applications, a simple, fast, lightweight and widely applicable displacement sensor has important application value and engineering application demand, especially for non-contact displacement measurement scenarios, for realizing displacement adjustment scheme and measurement system planning.

[0003] For the existing displacement sensors, the contact displacement sensor is complicated to install, and its application is limited in displacement measurement of lightweight flexible structures and high-pressure environments. The non-contact laser displacement sensor has large volume and power consumption, high cost, and high requirements for the measurement environment. Therefore, there is an urgent need to develop a convenient, fast, low-cost and high-precision non-contact displacement sensor.

[0004] The patent document with publication number CN217786104U discloses a laser probe, which includes a mounting body and two lenses arranged on the mounting body. The mounting body also has a transmitting component and a receiving component, and the transmitting component and the receiving component are arranged opposite to the two lenses. A laser displacement sensor is also disclosed, which includes a circuit board and the above-mentioned laser probe. The circuit board is installed on the mounting body, and the transmitting component and the receiving component are electrically connected to the circuit board. Another laser displacement sensor is also disclosed, which includes a circuit board and the above-mentioned laser probe. The mounting body has a mounting groove outside the two second mounting holes, and the circuit board is installed in the mounting groove. The transmitting component and the receiving component are electrically connected to the circuit board. Although the laser probe and the laser displacement sensor have the advantages of high integration level and detection accuracy, they have large volume and power consumption, high cost, and high requirements for the measurement environment. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a microwave single-point displacement sensor.

[0006] According to the microwave single-point displacement sensor provided by the utility model, it includes a sensor shell, an auxiliary positioning module, a beam focusing module, a sensor circuit module and a microwave antenna module.

[0007] The sensor circuit module is installed inside the sensor shell, the microwave antenna module is integrated on the sensor circuit module and faces one side of the sensor shell for transmitting and receiving microwave signals.

[0008] The auxiliary positioning module is installed on one side of the sensor shell for visualizing the positioning of the measuring point, and the beam focusing module is installed on one side of the sensor shell and covers the microwave antenna module for focusing and enhancing the microwave signals emitted by the microwave antenna module.

[0009] Preferably, the beam focusing module comprises a hemispherical antenna cover, a dielectric antenna or a lens antenna, the beam focusing module is installed outside the microwave antenna module, and the microwave signals emitted by the microwave antenna module are focused after refraction by the beam focusing module.

[0010] Preferably, the auxiliary positioning module is one or more and is arranged in a circumferential direction outside the hemispherical antenna cover.

[0011] Preferably, the auxiliary positioning module comprises a laser pointer.

[0012] Preferably, the sensor shell comprises an aluminum alloy shell.

[0013] Preferably, the microwave antenna module comprises a single-transmitting and single-receiving microwave antenna or a multiple-transmitting and multiple-receiving microwave antenna.

[0014] Preferably, the microwave antenna module is located at the center of the hemispherical antenna cover along the projection of the rotation axis of the hemispherical antenna cover.

[0015] Preferably, a power module is further included, the power module is installed inside the sensor shell and is electrically connected with the microwave antenna module and the auxiliary positioning module respectively.

[0016] Preferably, a communication module is further included, the communication module is integrated on the sensor circuit module for communicating with an external host computer.

[0017] Preferably, the hemispherical antenna cover adopts a transparent or non-transparent material with a refractive index greater than that of air.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model provides a kind of microwave single point displacement sensor, and the focusing and enhancement of microwave signal are realized by beam focusing module, solve the technical problems, such as high cost, poor portability, volume and power consumption, high test environment requirement and limited application range of existing displacement sensor, and the high-precision measurement of single point displacement is realized by the visual positioning of measuring point by auxiliary positioning module. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings:

[0021] Figure 1 It is a whole structure schematic view of the side view angle of the present application;

[0022] Figure 2 It is a whole structure schematic view of the front view angle of the present application;

[0023] Figure 3 It is a measurement principle schematic view of the present application;

[0024] Figure 4 It is a measurement process schematic view of the present application.

[0025] The figure shows:

[0026] Sensor shell 1 Sensor circuit module 4

[0027] Auxiliary positioning module 2 Microwave antenna module 5

[0028] Beam focusing module 3 DETAILED DESCRIPTION

[0029] The present application will be described in detail below with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of changes and improvements can be made. These all belong to the protection scope of the present application.

[0030] The present application provides a kind of micro single point displacement sensor, can solve the problem such as complex and complicated operation of contact type displacement sensor (for example acceleration sensor), not applicable to lightweight, flexible structure displacement measurement and poor environmental adaptability;Solve the problems such as strict equipment installation and environmental conditions requirements of non-contact displacement sensor (for example laser displacement sensor), poor portability, high cost, large volume and power consumption, and equipped with beam focusing module and auxiliary positioning module, can realize the high-precision measurement of single point displacement, provide a kind of low-cost, easy to operate and environmental adaptability wide non-contact displacement sensor.

[0031] According to the micro single point displacement sensor provided by the present application, such as Figure 1As shown, it comprises a sensor housing 1, an auxiliary positioning module 2, a beam focusing module 3, a sensor circuit module 4 and a microwave antenna module 5; the sensor circuit module 4 is installed inside the sensor housing 1, the microwave antenna module 5 is integrated on the sensor circuit module 4 and faces one side of the sensor housing 1 for transmitting and receiving microwave signals; the auxiliary positioning module 2 is installed on one side of the sensor housing 1 for visualizing the positioning of measuring points, and the beam focusing module 3 is installed on one side of the sensor housing 1 and covers the microwave antenna module 5 for focusing and enhancing the microwave signals emitted by the microwave antenna module 5.

[0032] In a preferred embodiment, the beam focusing module 3 comprises a hemispherical antenna cover installed outside the microwave antenna module 5, and the microwave signals emitted by the microwave antenna module 5 are focused after refraction through the hemispherical antenna cover. The auxiliary positioning module 2 is one or more and is arranged circumferentially outside the hemispherical antenna cover for visualizing the positioning of different measuring points.

[0033] The microwave antenna module 5 is located at the center of the hemispherical antenna cover in the projection along the rotation axis of the hemispherical antenna cover. The hemispherical antenna cover is made of transparent or non-transparent material with a refractive index greater than that of air, and the microwave signals are focused towards the axis of the hemispherical antenna cover through refraction.

[0034] Specifically, the auxiliary positioning module 2 comprises a laser pointer. The sensor housing 1 comprises an aluminum alloy housing. The microwave antenna module 5 comprises a single-transmit-single-receive microwave antenna or a multi-transmit-multi-receive microwave antenna. Preferably, it further comprises a power module and a communication module, the power module is installed inside the sensor housing 1 and is electrically connected to the microwave antenna module 5 and the auxiliary positioning module 2 respectively, and the communication module is integrated on the sensor circuit module 4 for communication with an external host computer.

[0035] Embodiment 1

[0036] The present embodiment provides a microwave single-point displacement sensor, which comprises a circuit module and a functional module, wherein the circuit module comprises:

[0037] Communication module: realizes communication with the host computer and data transmission function of the user interface.

[0038] Signal acquisition and processing module: used for acquiring the microwave signals transmitted and received by the microwave single-point displacement sensor, and extracting and analyzing displacement information.

[0039] Power module: provides power for the microwave single-point displacement sensor.

[0040] The functional module comprises:

[0041] Microwave antenna module 5: can be composed of single-transmitting single-receiving or multi-transmitting multi-receiving antenna, and is used for transmitting microwave signals.

[0042] Auxiliary positioning module 2: visual positioning of the measuring point is realized by using a laser pointer, so that the user can judge the measuring point information.

[0043] Beam focusing module 3: used for realizing beam focusing of the microwave signal and improving the measurement accuracy.

[0044] Embodiment 2

[0045] In this embodiment, the sensor shell 1 is preferably made of aluminum alloy material, which provides a hard shell protection for the internal components; the auxiliary positioning module 2 is mainly a laser pointer, which is installed at a specified position of the shell and provides a visual positioning function for the user; and the beam focusing module can be a structure capable of realizing the beam focusing function, such as a semi-spherical antenna cover, a dielectric antenna, and a lens antenna. In a preferred embodiment, the beam focusing module comprises a semi-spherical antenna cover, which is installed outside the microwave antenna module, and the microwave signals emitted by the microwave antenna module are refracted and focused through the semi-spherical antenna cover, so as to realize the functions of focusing and signal enhancement of the microwave signals; the microwave antenna module 5 can be a single-transmitting single-receiving or multi-transmitting multi-receiving microwave antenna, which is integrated on the sensor circuit module 4; and the remaining electronic components and functional modules are integrated on the sensor circuit module to form a complete microwave circuit board.

[0046] The working principle of the utility model is shown in Figure 3 ;

[0047] The microwave antenna module 5 initially emits microwave signals within a certain beam angle range, and the beam angle is the range of the angle of the microwave antenna module 5. Because the dielectric constants of air and the semi-spherical antenna cover are different, the refractive index of the microwave signal is different, so the wave surface emitted by the antenna can be reshaped to achieve the effect of beam focusing. By beam focusing, the beam angle of the microwave emission is reduced, and under the premise of constant microwave energy, the energy density in the beam range is increased, thereby improving the signal gain. The principle of measuring the displacement of an object by a microwave is realized by microwave frequency and phase interference measurement. The beam focusing improves the signal gain strength, increases the measurement distance, and does not introduce any error influence on the measurement result.

[0048] The measurement process of the utility model is shown in Figure 4 ;

[0049] Firstly, through the auxiliary positioning module 2, mainly a laser pointer, the visual positioning of the measuring point target is realized. After determining that the measuring point target is correctly identified, the microwave signal is focused on the measuring point by the beam focusing module 3, the selection of the measuring point position is realized, so as to extract the time sequence characteristics of the vibration displacement of the measured target, finally the data is saved and processed through the signal acquisition and processing module, and the non-contact high-precision measurement of single-point displacement is realized.

[0050] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0051] The specific embodiments of the utility model are described above. It should be understood that the utility model is not limited to the specific implementation described above, and those skilled in the art can make various changes or modifications within the scope of claims, which does not affect the essential content of the utility model. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A micro-patch single point displacement sensor, characterized by, The sensor includes a sensor housing (1), an auxiliary positioning module (2), a beam focusing module (3), a sensor circuit module (4) and a microwave antenna module (5). The sensor circuit module (4) is installed inside the sensor housing (1), the microwave antenna module (5) is integrated on the sensor circuit module (4) and faces one side of the sensor housing (1) for transmitting and receiving microwave signals. The auxiliary positioning module (2) is installed on one side of the sensor housing (1) for visualizing positioning points, the beam focusing module (3) is installed on one side of the sensor housing (1) and covers the microwave antenna module (5) for focusing and enhancing the microwave signals emitted by the microwave antenna module (5).

2. The microstrip single point displacement sensor of claim 1, wherein, The beam focusing module (3) includes a hemispherical antenna cover, a dielectric antenna or a lens antenna, the beam focusing module (3) is installed outside the microwave antenna module (5), and the microwave signals emitted by the microwave antenna module (5) are focused after refraction by the beam focusing module (3).

3. The microstrip single point displacement sensor of claim 2, wherein, The auxiliary positioning module (2) is one or more and is arranged circumferentially outside the hemispherical antenna cover.

4. The microstrip single point displacement sensor of claim 1, wherein, The auxiliary positioning module (2) includes a laser pointer.

5. The microstrip single point displacement sensor of claim 1, wherein, The sensor housing (1) includes an aluminum alloy housing.

6. The microstrip single point displacement sensor of claim 1, wherein, The microwave antenna module (5) includes a single-transmitting and single-receiving microwave antenna or a multi-transmitting and multi-receiving microwave antenna.

7. The microstrip single point displacement sensor of claim 2, wherein, The microwave antenna module (5) is located at the center of the hemispherical antenna cover in the projection along the rotation axis of the hemispherical antenna cover.

8. The microstrip single point displacement sensor of claim 1, wherein, A power module is further included, which is installed inside the sensor housing (1) and is electrically connected with the microwave antenna module (5) and the auxiliary positioning module (2) respectively.

9. The microstrip single point displacement sensor of claim 1, wherein, A communication module is further included, which is integrated on the sensor circuit module (4) for communicating with an external host computer.

10. The microstrip single point displacement sensor of claim 2, wherein, The hemispherical antenna cover is made of transparent or non-transparent material with a refractive index greater than that of air.

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