CN102331237B - Laser settlement flexibility monitor - Google Patents

Abstract

The invention discloses a laser settlement deflection monitor, which includes more than one set of transmitting units and receiving units that cooperate with each other. The transmitting unit is a laser used to emit laser beams to the receiving unit. The receiving unit includes a linear array CCD. Image acquisition unit, analysis and processing system and power supply. The linear array CCD image acquisition unit collects the laser beam and converts it into an electrical signal and transmits it to the analysis and processing system. The analysis and processing system processes the electrical signal and then determines the settlement deformation. The invention has the advantages of simple and compact structure, low cost, easy installation and debugging, stable and reliable operation, etc.

Description

Laser settlement deflection monitor

technical field

The invention mainly relates to the field of detection equipment for structural engineering, in particular to a settlement deflection monitoring equipment.

Background technique

For large structures, such as bridges, dams, buildings, etc., its settlement deformation is an important indicator related to whether the structure can operate safely for a long time. In order to ensure the long-term safe operation of this type of structure and avoid accidents, it is often necessary to do long-term automatic monitoring of the settlement deformation of this type of structure.

In the prior art, the connected liquid level settlement deflection detection system is currently a relatively widely used settlement deflection monitoring method, but this method requires a water pipe to connect all the measuring points in series, so it is very inconvenient to install on site; and due to the continuous volatilization of liquid , requiring regular fluid replenishment. In addition, because the balance of the liquid is very slow, it cannot react to the settlement deformation caused by the vehicle, so the measurement accuracy is low.

Contents of the invention

The technical problem to be solved by the present invention is: aiming at the technical problems existing in the prior art, the present invention provides a laser settlement deflection monitor with simple and compact structure, low cost, easy installation and debugging, and stable and reliable operation.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A laser settlement deflection monitor, characterized in that it includes more than one set of cooperating transmitting units and receiving units, the transmitting unit is a laser used to emit laser beams to the receiving unit, and the receiving unit includes a linear array CCD An image acquisition unit, an analysis and processing system, and a power supply. The linear array CCD image acquisition unit collects laser beams and converts them into electrical signals and sends them to the analysis and processing system. The analysis and processing system processes the electrical signals to determine settlement deformation.

As a further improvement of the present invention:

The analysis and processing system includes a drive control circuit, an A/D converter, a single-chip microcomputer chip, an RS485 bus interface and a wireless transceiver module, and the single-chip microcomputer chip is connected to an upper computer through an RS485 bus interface and a wireless transceiver module. The drive control circuit, the A/D converter are connected with the line array CCD image acquisition unit.

The power source is a solar cell.

The receiving unit also includes a shutter and a filter arranged between the linear CCD image acquisition unit and the laser.

The transmitting unit and the receiving unit are respectively installed on two brackets, and the two brackets are relatively arranged at adjacent measuring points.

The bracket is provided with a laser angle adjustment knob for adjusting the position of the transmitting unit.

Compared with the prior art, the present invention has the advantages of:

1. The laser settlement deflection monitor of the present invention has a simple and compact structure and low cost. By replacing the connecting pipe with a laser, the working stability is quite high, which is suitable for long-term monitoring, and avoids the layout and debugging of complex liquid pipelines, making the site Installation and debugging are more convenient;

2. In the present invention, a high-precision linear array CCD image sensor is adopted, which has no zero point drift, is stable and reliable for a long time, and has high measurement accuracy;

3. The solar battery is used for power supply in the present invention, no external battery or alternating current is needed, and the working performance is good and the service time is long;

4. The present invention adopts wireless transmission means, which is very convenient to arrange, suitable for long-distance wireless data transmission, and does not need external signal transmission wires.

Description of drawings

Fig. 1 is the schematic diagram when the present invention is applied;

Fig. 2 is a schematic diagram of the frame structure of the present invention;

Fig. 3 is a schematic diagram of the frame structure of the receiving unit in the present invention;

Fig. 4 is a schematic diagram of the circuit principle of the receiving unit in the specific embodiment.

illustration:

   1. Laser; 2. Shaker; 3. Optical filter; 4. Linear array CCD image acquisition unit; 5. Drive control circuit; 6. A/D converter; 7. Single-chip microcomputer chip; 8. RS485 bus interface; 9 1. Wireless transceiver module; 10. Solar battery; 11. Bracket; 12. Measuring point; 13. Laser beam; 14. Laser angle adjustment knob; 15. Transmitting unit; 16. Receiving unit.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the laser subsidence deflection monitor of the present invention includes a transmitting unit 15 and a receiving unit 16 that cooperate with each other, the transmitting unit adopts a laser 1, and the receiving unit includes a shutter 2, a filter Optical device 3, linear array CCD image acquisition unit 4, analysis and processing system and solar cell 10, linear array CCD image acquisition unit 4 adopts CCD image sensor in the present embodiment, and this analysis and processing system includes drive control circuit 5, A/D Converter 6, single-chip microcomputer chip 7 (or single-chip microcomputer), RS485 bus interface 8 and wireless transceiver module 9, the analysis and processing system is connected to the upper computer through the wireless transceiver module 9. In this embodiment, referring to FIG. 4 , the single-chip microcomputer chip 7 is U4. The shutter 2 is a circular structure of stainless steel, plus a filter, which can effectively filter light other than laser light. Except for the shutter 2 and the solar cell 10, other components are fixed in a sealed casing. A beam of laser light emitted by the laser 1 will pass through the shutter 2 and the filter 3 to filter out the light other than the laser light. If there is relative deformation (deflection) between the transmitting unit 15 and the receiving unit 16, the position of the laser irradiation on the line array CCD image acquisition unit 4 will also change accordingly, and the signal output by the CCD image sensor will also change accordingly , and then through the corresponding image acquisition, analysis and processing to calculate the corresponding deformation.

Referring to Fig. 1, in the present embodiment, grouped transmitting unit 15 and receiving unit 16 are respectively installed on adjacent two measuring points 12, each measuring point 12 places are all provided with a support 11, transmitting unit 15 and receiving unit The units 16 are respectively fixed at corresponding positions on the two brackets 11 . The laser beam 13 emitted by the laser 1 will reach the receiving unit 16 on the adjacent bracket 11 for real-time monitoring. Further, a laser angle adjustment knob 14 may also be installed on the bracket 11 to facilitate adaptive adjustment of the positions of the laser 1 and the receiving unit 16 .

It can be understood that for a structure, several measuring points 12 will be arranged, and similarly, an array of transmitting units 15 and receiving units 16 of the present invention will also be arranged to ensure the accuracy and reliability of monitoring. That is, a plurality of settlement deflection monitors of the present invention can be combined into a settlement deflection monitoring system.

At the same time, for engineering structures (such as bridges), in addition to settlement deformation, each measuring point 12 will also produce corner deformation, which will cause the light emitted by the laser 1 to deflect, seriously affecting the measurement accuracy of vertical deformation. Therefore, in the above-mentioned settlement deflection monitoring system, the present invention is further provided with two settlement deflection detectors (only one reference point on both sides) at each measuring point 12, and its effect is to measure the relative angle of rotation of each measuring point 12, thereby can Effectively correct the measurement error of the 12 rotation angles of the measuring point on the settlement accuracy.

Working principle: the host computer issues a data acquisition command, the wireless transceiver module 9 receives the command from the host computer, and sends it to the single-chip microcomputer chip 7 through the RS485 bus interface 8 . The single-chip microcomputer chip 7 outputs corresponding control signals by driving the control circuit 5 , and the CCD image sensor outputs an electrical signal corresponding to the optical signal according to the requirements of the control signal, which is input to the single-chip microcomputer chip 7 through the A/D converter 6 . The single-chip microcomputer chip 7 calculates and analyzes the position of laser irradiation on the CCD sensor according to the collected electrical signal, and uploads it to the upper computer through the RS485 bus interface 8 and the wireless transceiver module 9 .

The above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (5)

1. A laser settlement deflection monitor, characterized in that it includes more than one set of cooperating transmitting units (15) and receiving units (16), and the transmitting unit (15) is used to monitor the receiving unit (16) A laser (1) that emits a laser beam, the receiving unit (16) includes a linear array CCD image acquisition unit (4), an analysis and processing system, and a power supply, and the linear array CCD image acquisition unit (4) acquires and converts the laser beam The electric signal is transmitted to the analysis and processing system, and the analysis and processing system judges the settlement deformation after processing the electric signal; the transmitting unit (15) and the receiving unit (16) are respectively installed on two brackets (11), The two brackets (11) are relatively arranged at adjacent measuring points (12). 2. The laser settlement deflection monitor according to claim 1, characterized in that: the analysis and processing system includes a drive control circuit (5), an A/D converter (6), a single-chip microcomputer chip (7), and an RS485 bus Interface (8) and wireless transceiver module (9), the single-chip microcomputer chip (7) is connected to the host computer through the RS485 bus interface (8) and the wireless transceiver module (9), and the single-chip microcomputer chip (7) is connected through the drive control circuit ( 5), the A/D converter (6) is connected with the linear array CCD image acquisition unit (4). 3. The laser settlement deflection monitor according to claim 1, characterized in that: the power supply is a solar cell (10). 4. The laser settlement deflection monitor according to claim 1, characterized in that: the receiving unit (16) further includes a shutter ( 2) and filter (3). 5. The laser settlement deflection monitor according to claim 1, characterized in that: the bracket (11) is provided with a laser angle adjustment knob (14) for adjusting the position of the emitting unit (15).

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