CN2479477Y

CN2479477Y - Photoelectric deformation coordinatograph

Info

Publication number: CN2479477Y
Application number: CN 01213189
Authority: CN
Inventors: 郭晨; 尚宏; 吴小华; 路生鸿
Original assignee: LIANNENG AUTOMATION ENGINEERING Co Ltd XI'AN
Current assignee: LIANNENG AUTOMATION ENGINEERING Co Ltd XI'AN
Priority date: 2001-04-13
Filing date: 2001-04-13
Publication date: 2002-02-27
Anticipated expiration: 2011-04-13

Abstract

A photo-electric deforming coordinate apparatus mainly comprises a coordinate apparatus shell body, a light source, a receiving picture sensor and an observing and controlling circuit board, wherein the shell body appears a ring shape, one side of the shell body is equipped with a line passing seam, a lens of each light source is corresponding with the position of the receiving picture sensor, and the receiving picture sensor and the light source are respectively electrically connected with the observing and controlling circuit board. The coordinate apparatus overcomes the deficits that the prior art is easy to induct the thunder and lightning to trigger a plurality of accidents and the like from structure, adopts the CCD picture sensor from the technology so that the utility model has no mechanical movement, no floating, and strong anti interfering ability, and greatly increases the measuring accuracy.

Description

Photo-electric deformation coordinate instrument

The utility model relates to a kind of coelosphere that is used to measure ground levels such as power station dam, landslide, buildings, vertical deformation monitoring.

In the Geotechnical Engineering safety monitoring, deformation monitoring is a requisite important monitoring project.Because Geotechnical Engineering structure such as dam, landslide etc. are slow with extraneous factor (as water level, temperature etc.) change procedure,, monitor value stability, continuity, reliability there is strict demand for the ease of grasping operating mode in each in period.Along with science and technology further develops, require to improve hydroelectric project construction time, runtime field monitoring means, realize having built up " unmanned " of power station dam safety monitoring.For this reason,, carried out a lot of researchs both at home and abroad, proposed the instrument and equipment achievement that some are used for the dam deformation monitoring, and in engineering, use from the sixties.The instrument of existing deformation monitoring is divided into induction type and mechanical type according to principle.Wherein the induction type deformeter is made up of the parallel rectangle measuring pad of two couple of mutually perpendicular direction and cylindrical wires body and sensing element of being positioned at their centres, two pairs of measuring pads are installed on the pedestal, intermediate plate is fixed on the vertical line, its shortcoming is a cylinder line body induction lightening, easily cause instrument failure, so very high to insulating requirements between attached wire body sensing element and line body, and instrument needs strict ground connection.Draw bracing cable in addition and cause big measuring error because of temperature deformation causes attached wire body sensing element change in location, there is drifting problem in long-time running; The mechanical type instrument is to connect screw mandrel by stepping motor to drive " U " shape probe, the line body centre position in " U " type.Its shortcoming is to be prone to the motor damage after running into humidity, or rotary resistance is big, and measured value is undesired etc.

The purpose of this utility model provides a kind of photo-electric deformation coordinate instrument, overcoming above-mentioned shortcoming of the prior art, its does not have the machinery action, do not have drift in measuring and antijamming capability strong, the instrument long service life.

This purpose realizes with following technical proposal: this photo-electric deformation coordinate instrument, it has a ring-like housing, be provided with the linear slit crack in the one side, be provided with two lasing light emitters in the ring-like housing, receive imageing sensor, the telemetry circuit plate, the lens of lasing light emitter are corresponding with reception imageing sensor position, and wherein every reception imageing sensor, lasing light emitter are electrically connected with the telemetry circuit plate respectively, receive imageing sensor and interconnect.Described reception imageing sensor is by filter plate and ccd image sensor is bonding constitutes.Described telemetry circuit plate comprises ccd data acquisition module, data processing module and power circuit.The ccd data acquisition module includes the CCD pulse-generator circuit that receives CCD cycle synchronisation signal, be connected to the CCD driving circuit at its output terminal, output by driving circuit is connected to ccd image sensor, and the output of CCD is connected with floating value comparator circuit and level shaping circuit respectively.Data processing module includes 89C51 single-chip microcomputer, watchdog microcontroller circuit and the anti-lightning strike holding circuit of RS485 interface.

It has adopted current state-of-the-art ccd image sensor and solid-state laser source directional light device and equipment to this photo-electric deformation coordinate instrument on structure; The full-digital circuit control section is divided into module arrangement glue envelope, and it and Instrument shell have formed the double protection structure, and waterproof, humidity resistance are good, whole instrument does not have the machinery action, does not have drift, and antijamming capability is strong, improve measuring accuracy greatly, overcome deficiency of the prior art fully.

Following accompanying drawing has provided embodiment of the present utility model:

Fig. 1 watches figure attentively for the utility model profile structure.

Fig. 2 is the utility model inner structure synoptic diagram.

Fig. 3 is the electrical connection synoptic diagram of inner structure.

Fig. 4 is a schematic block circuit diagram of the present utility model.

Fig. 5 is the utility model telemetry circuit physical circuit fundamental diagram.

Fig. 6 is the power circuit fundamental diagram of 5V, 12V.

In conjunction with the accompanying drawings one-piece construction of the present utility model and principle of work thereof are done further explanation:

As shown in Figure 1, 2: this photo-electric deformation coordinate instrument, it has a housing 1 that is located on the base plate, integral body substantially circlewise, in the one side linear slit crack 2 was arranged, vertical line 9 is 2 central authorities that enter and be in the square annular port of housing from the slit, and two cover lasing light emitters 3 are fixedly mounted in the housing, and this lasing light emitter adopts λ=6700A, power=1mw solid-state laser, camera lens adopts K9 glass.Have two covers to receive image C CD sensor 4 with the corresponding device of lasing light emitter camera lens in housing, they are made of ccd image sensor and filter plate respectively.Reception image C CD sensor circuit board places in two protection boxes and is connected and fixed with this Instrument shell 1.Telemetry circuit plate 5 also is fixed in the Instrument shell by the protection box, and entire circuit is subjected to the glue envelope and adds the double shielding of protection box.Shown in Figure 3 is one-piece construction each several part circuit connecting relation, and wherein two cover reception imageing sensor 4 (being ccd image sensor) receiving ends interconnect.Two cover lasing light emitters 3 and image C CD sensor 4 are electrically connected with telemetry circuit plate 5 respectively, and the output of telemetry circuit connects the RS485 interface circuit, and telemetry circuit is introduced the 220V power lead.Shown in Figure 4, the entire circuit of this photo-electric deformation coordinate instrument partly is to be made of two big modules and power circuit, i.e. ccd data acquisition module 6, data processing module 7 and power circuit 8.Wherein ccd data acquisition module 6 includes the CCD pulse-generator circuit that receives CCD cycle synchronisation signal, is connected to ccd image sensor at its output terminal, and the output of ccd image sensor is connected with floating value comparator circuit and level shaping circuit respectively.Data processing module 7 includes 89C51 single-chip microcomputer, watchdog microcontroller circuit and the anti-lightning strike holding circuit of RS485 interface.

According to the accompanying drawing 5 that provides, the circuit working principle of 6 pairs of these coelospheres is done one and is described in detail: see Fig. 5, during measurement, single-chip microcomputer P1.2 pin output low level, the control electronic switch power circuit, open light source, the ccd data acquisition module (comprises the CCD driving circuit, CCD pulse producer and CCD line scan image sensor, floating value comparator circuit and level shaping circuit) power supply, by the 4M crystal oscillator, the pulse producer output pulse signal that 54LS04 etc. form is to frequency divider IC2 (54LS393) P13 pin, behind IC2 (54LS393) frequency division, IC2 (54L,S39 3) P9 pin, IC2 (54LS393) P10 pin is exported 1000KHz pulse signal and 500KHz pulse signal respectively, divide two-way to output to the ccd image sensor input end: the one tunnel is that 1000KHz pulse signal and 500KHz pulse signal arrive ccd image sensor P20 pin through IC5 and IC6 Sheffer stroke gate, another road is that anti-phase back of 500KHz pulse signal and 1000KHz pulse signal arrive ccd image sensor P4 pin through IC5 and IC6 Sheffer stroke gate, as the input pulse signal of ccd image sensor; IC2 (54LS393) P6 pin is exported one road pulse signal to frequency divider IC3 (54LS393) P13 pin simultaneously, behind IC3 (54LS393) frequency division, output to IC4 (54LS393) P12 pin by IC3 (54LS393) P5 pin, the pulse signal of IC4 (54LS393) P5 pin output 120Hz is as the initial pulse of 89C51 single-chip data acquisition.Ccd image sensor will be corresponding with initial pulse CCD pixel brightness value pulse signal output, (referring to Fig. 6) this pixel brightness value pulse signal enters into 9014 and forms follower circuits, gets the edge pulse of half-light source and divides three tunnel outputs; See Fig. 5, two pulse signals via IC11 (LM124) dividing potential drop after, obtain floating threshold voltage, enter the comparison shaping circuit that IC13 (LM139) forms, comparison shaping circuit and floating threshold voltage that another road pulse signal directly outputs to IC13 (LM139) composition compare: when floating threshold voltage greater than 2/3, be output as low level, when floating threshold voltage greater than 1/3 less than 2/3 floating threshold voltage, be output as high level, when floating threshold voltage, as the noise signal filtering less than 1/3, after comparing shaping, outlet body projection umber of pulse is input to the 89C51 single-chip microcomputer and carries out data processing, it is wide to calculate line position pixel number and line body, obtains the displacement of detected material.Finish 89C51 single-chip microcomputer P1.2 pin output high level behind the one-shot measurement, make 9014 conductings in the electronic switch circuit, close light source, ccd data acquisition module power supply, transmit measured value in interface circuit RS485, finish in the overall process 2 seconds through 1480B.

Shown in Figure 6, photo-electric deformation coordinate instrument has adopted two kinds of power supply modes: the one tunnel is power supply continuously, by supplying with 89C51 watchdog microcontroller and RS485 circuit after 7805 voltage stabilizings; Three road voltages (two+5V ,+12V) be may command voltage, under the control of 89C51 single-chip microcomputer, after the LM317 voltage stabilizing, supply with light source, ccd data acquisition module (CCD driving circuit, CCD pulse producer and CCD Line Chart image-position sensor, floating value comparator circuit and level shaping circuit).This power supply not only adopts two kinds of power supply modes and has that interference, noise are little, the electronic switch of good stability, can prolong the life-span of the measuring elements such as ccd data acquisition module of measure portion effectively, improve continuity, accuracy and the reliability of measured value, satisfy the working method of monitoring rock and soil engineering.

Shown in Figure 5, photo-electric deformation coordinate instrument uses IC14 (MAX705) and IC15 (54LS86) to form watchdog circuit, effectively prevented " deadlock " that cause because of various factors, improved reliability, export the WD1 pin of a pulse signal by the P1.1 pin of single-chip microcomputer 89C51, make the every 1.6s upset of IC14 (MAX705) once, if overtime to IC14 (MAX705), then the RST pin of IC14 (MAX705) output high level triggers the 89C51 single-chip microcomputer through IC15 (54LS 86) and resets.This coelosphere has also adopted reliable anti-lightning strike safeguard measure.The anti-lightning strike product MAX1480B chip of famous U.S. MAXIM company is adopted in the anti-lightning strike protection of RS485 interface, and its index can reach 1600V _RMS(1minute) or 2000V _RMS(1second).In order to eliminate the lightning wave of invading on the power circuit, adopt the mode that combines with protective tube at power input increase bipolarity TVS transient voltage suppressor to protect.

Claims

1, a kind of photo-electric deformation coordinate instrument, it is characterized in that it has a ring-like housing (1), be provided with linear slit crack (2) in the one side, be provided with two light sources (3) in the ring-like housing, receive imageing sensor (4), telemetry circuit plate (5), the lens of light source (3) are corresponding with reception imageing sensor (4) position, and wherein every reception imageing sensor (4), light source (3) are electrically connected with telemetry circuit plate (5) respectively, receive imageing sensor (4) and interconnect.

2, photo-electric deformation coordinate instrument according to claim 1 is characterized in that described reception imageing sensor (4) is by filter plate and ccd image sensor is bonding to constitute.

3, photo-electric deformation coordinate instrument according to claim 1 is characterized in that described telemetry circuit plate (5) mainly comprises ccd data acquisition module (6), data processing module (7) and power circuit (8).

4, photo-electric deformation coordinate instrument according to claim 3, it is characterized in that ccd data acquisition module (6) includes the CCD pulse-generator circuit that receives CCD cycle synchronisation signal, be connected to the CCD driving circuit at its output terminal, output by driving circuit is connected to ccd image sensor, and the output of ccd image sensor is connected with floating value comparator circuit and level shaping circuit respectively.

5, photo-electric deformation coordinate instrument according to claim 3 is characterized in that data processing module (7) includes 89C51 single-chip microcomputer, watchdog microcontroller circuit and the anti-lightning strike holding circuit of RS485 interface.