CN211717407U - Two-dimensional surface deformation measuring radar and measuring system thereof - Google Patents

Abstract

The utility model discloses a two-dimensional surface deformation measurement radar and a measurement system thereof. The measurement radar comprises a receiving antenna and a processing terminal. The receiving antenna comprises a horizontal antenna array and a vertical antenna array. The echo signals received by each antenna unit of the vertical antenna array determine the azimuth, elevation and deformation of the target, and determine the shape of the target in the vertical and horizontal directions according to the azimuth, elevation and radial deformation. variable. The measuring system includes a plurality of marking devices, ranging devices, and measuring radars, the marking devices can mark targets, the ranging devices can measure the distance between each marking device and the measuring radar, and the measuring radar can simultaneously measure multiple targets in the vertical direction. The deformation amount in the direction and the horizontal direction, and according to the distance between each marking device and the measuring radar, the deformation amount in the vertical direction and the horizontal direction corresponding to each target is matched.

Description

Two-dimensional surface deformation measurement radar and its measurement system

technical field

The utility model relates to the field of measuring equipment featuring microwaves, in particular to a two-dimensional surface deformation measuring radar and a measuring system thereof.

Background technique

Differential interference technology is often used to detect the deformation of objects. Its technical principle is to transmit a continuous wave signal to the same target, and receive two consecutive echo signals of the target to perform a difference to obtain the phase difference of the two echo signals. Deformation of the target. Since the deformation amount is calculated from the phase, the detected deformation amount is very accurate and widely used.

For example, the patent "Bridge Deformation Monitoring Radar Sensor" (Bulletin No. CN207456374U) discloses a monitoring radar sensor, which can accurately detect the deformation amount of the target by using the differential interference technology. However, this radar sensor can only detect the deformation amount of the target in the vertical direction, and cannot detect the deformation amount of the target in the horizontal direction.

The patent "A Two-dimensional Surface Deformation Monitoring System Based on Microwave Interference" (Announcement No. 208721024U) uses two radars to measure the deformation of the same target. According to the positions and measurement results of the two radars, the horizontal and The deformation component in the vertical direction. Since more than 2 radars are used, the use cost of this kind of measurement system is high.

Utility model content

In order to solve the above technical problems, the utility model provides a two-dimensional surface deformation measurement radar and a measurement system thereof. One measurement radar can measure the deformation amount of the target in the horizontal direction and the vertical direction, thereby saving the use cost.

The technical solution is as follows:

In a first aspect, a two-dimensional surface deformation measurement radar is provided, including a receiving antenna and a processing terminal, the receiving antenna includes a horizontal antenna array and a vertical antenna array, and the processing terminal is based on the horizontal antenna array and vertical antenna array respectively. The echo signals received by each antenna element of the antenna array determine the azimuth, elevation and radial deformation of the target, and determine the shape of the target in the vertical and horizontal directions according to the azimuth, elevation and radial deformation. variable.

With reference to the first aspect, in a first implementable manner of the first aspect, an inclination angle detector is further included, the inclination angle detector is used to detect the inclination angle of the receiving antenna in the vertical direction, and the processing terminal calculates the received angle according to the inclination angle. the pitch angle.

With reference to the first aspect or the first implementable manner, in a second implementable manner of the first aspect, both the horizontal antenna array and the vertical antenna array include at least three antenna elements.

In a second aspect, a two-dimensional surface deformation measurement radar system is provided, including a plurality of marking devices, ranging devices, and the above-mentioned measurement radar, wherein;

the marking device for marking the target;

the distance measuring device for measuring the distance between each marking device and the measuring radar;

The measuring radar is used to simultaneously measure the vertical and horizontal deformations of multiple targets, and match the vertical and horizontal deformations corresponding to each target according to the distance between each marking device and the measuring radar.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the marking device is an optical marking device, and the ranging device is an optical ranging device.

With reference to the first implementable aspect of the second aspect, in a second implementable manner of the second aspect, the optical marking device is a laser transmitter, and the optical range finder is a laser ranging sensor.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the marking device is a radio frequency tag, and the ranging device is a radio frequency ranging device.

Beneficial effects: by adopting the two-dimensional surface deformation measurement radar and the measurement system thereof of the present invention, the deformation amount of the target in the horizontal direction and the vertical direction can be simultaneously detected, the detection accuracy is high, the operation is convenient, the use cost is low, and the measurement system can simultaneously Multiple targets are detected synchronously, and the detection efficiency is high.

Description of drawings

Fig. 1 is the system structure block diagram of the present utility model;

2 is a schematic structural diagram of a receiving antenna;

FIG. 3 is a system structure block diagram of the measuring system of the present invention.

Detailed ways

The present utility model will be further described below in conjunction with the embodiments and the accompanying drawings.

As shown in Figure 1, the system block diagram of the two-dimensional surface deformation measurement radar includes a receiving antenna and a processing terminal. As shown in Figure 2, the receiving antenna includes a horizontal antenna array 1 and a vertical antenna array 2, so The processing terminal determines the azimuth angle, elevation angle and radial deformation of the target according to the echo signals received by each antenna unit 3 of the horizontal antenna array 1 and the vertical antenna array 2 respectively, and according to the azimuth angle, the elevation angle and the radius Towards the amount of deformation to determine the amount of deformation of the target in the vertical and horizontal directions.

Specifically, the transmitting antenna of the measuring radar can transmit continuous microwave signals to the target. After the microwave signal is reflected by the target, it is received by each antenna unit 3 on the receiving antenna and sent to the processing terminal of the measuring radar. 3. The received echo signals determine the distance between the target and each antenna unit 3. The processing terminal can use the principle of trilateration to determine the azimuth angle and the elevation angle of the target respectively in combination with the spacing distances between the antenna elements 3 in the horizontal antenna array 1 and the vertical antenna array 2 . The processing terminal can also use the differential interference technology to determine the radial deformation of the target, and finally determine the deformation of the target in the horizontal and vertical directions in combination with the azimuth and pitch angles of the target.

Preferably, an inclination angle detector is further included, and the inclination angle detector is used to detect the inclination angle of the receiving antenna in the vertical direction, and the processing terminal calculates the pitch angle according to the inclination angle.

In practical application scenarios, there may be an included angle between the receiving antenna and the horizontal plane, so the pitch angle data determined by the processing terminal according to the echo signal is actually the angle of the target relative to the receiving antenna plane. The tilt detector can detect the included angle between the receiving antenna and the horizontal plane, and combine with the angle of the target relative to the receiving antenna to determine the elevation angle of the target relative to the horizontal plane.

Preferably, both the horizontal antenna array 1 and the vertical antenna array 2 include at least three antenna elements 3 . In this way, the terminal can obtain a plurality of measurement data, and the existing data fusion method can be used to fuse the measurement data to reduce the measurement error.

The system block diagram of the two-dimensional surface deformation measurement radar system shown in FIG. 3, the radar system includes a plurality of marking devices, ranging devices, and the above-mentioned measurement radar, wherein;

the marking device for marking the target;

the distance measuring device for measuring the distance between each marking device and the measuring radar;

The measurement radar is used to simultaneously measure the vertical and horizontal deformations of multiple targets, and match the corresponding vertical and horizontal deformations of each target according to the distance between each marking device and the measurement radar. .

Specifically, the measurement radar can measure the deformation of multiple targets at the same time. In order to distinguish the corresponding deformation of each target, a marking device can be used to mark each target before measurement, and the ranging device can measure each marked target in real time. Radial distance of the radar. During measurement, the measuring radar can obtain the radial distance from the target to the measuring radar according to the echo signals of each target, and the deformation amount of each target. In this way, the measuring radar can match the corresponding deformation amount of each target according to the radial distance.

Preferably, the marking device is an optical marking device, and the ranging device is an optical ranging device. The optical marking device is placed at the target, and the optical range finder is set at the measuring radar. The optical range finder can detect the distance from the optical marking device, that is, the radial distance between the target and the measuring radar.

Preferably, the optical marking device is a laser transmitter, and the optical distance meter is a laser distance sensor. The laser transmitter can emit laser light, and the laser ranging sensor can detect the radial distance from the laser transmitter to the measuring radar. Laser ranging has high precision and is not easily disturbed.

The second embodiment and the second embodiment are substantially the same as the first embodiment, and the main difference is that the marking device is a radio frequency tag, and the ranging device is a radio frequency ranging device. The radio frequency tag can send out a radio frequency identification signal, and the radio frequency ranging device can determine the radial distance from each target to the measuring radar according to the strength of the radio frequency identification signal. The radio frequency tag is easy to arrange and has a low cost of use.

Finally, it should be noted that the above descriptions are only the preferred embodiments of the present invention, and those of ordinary skill in the art, under the inspiration of the present invention, can make many Similar expressions, such transformations fall within the protection scope of the present invention.

Claims (7)

1. The utility model provides a two-dimensional face deformation measurement radar, includes receiving antenna and processing terminal, its characterized in that: the receiving antenna comprises a transverse antenna array and a vertical antenna array, the processing terminal determines the azimuth angle, the pitch angle and the radial deformation of the target according to the echo signals received by the antenna units of the transverse antenna array and the vertical antenna array, and determines the deformation of the target in the vertical direction and the horizontal direction according to the azimuth angle, the pitch angle and the radial deformation.

2. The two-dimensional surface deformation measuring radar according to claim 1, wherein: the system further comprises an inclination angle detector, wherein the inclination angle detector is used for detecting the inclination angle of the receiving antenna in the vertical direction, and the processing terminal calculates the pitch angle according to the inclination angle.

3. The radar for measuring two-dimensional surface profile according to claim 1 or 2, wherein: the horizontal antenna array and the vertical antenna array both comprise at least 3 antenna units.

4. A radar system for measuring two-dimensional surface shape change is characterized in that: comprising a plurality of marking devices, ranging devices, and a measurement radar according to any one of claims 1 to 3, wherein;

the marking device is used for marking the target;

the distance measuring device is used for measuring the distance between each marking device and the measuring radar;

and the measuring radar is used for synchronously measuring the deformation quantities of the plurality of targets in the vertical direction and the horizontal direction, and matching the deformation quantities of the targets in the vertical direction and the horizontal direction according to the distance between each marking device and the measuring radar.

5. The radar system for two-dimensional surface profile measurement according to claim 4, wherein: the marking device is an optical marking device, and the distance measuring device is an optical distance measuring instrument.

6. The radar system for two-dimensional surface profile measurement according to claim 5, wherein: the optical marking device is a laser emitter, and the optical distance measuring instrument is a laser distance measuring sensor.

7. The radar system for two-dimensional surface profile measurement according to claim 4, wherein: the marking device is a radio frequency tag, and the distance measuring device is a radio frequency distance measuring device.

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