CN203432552U - Tunnel profiler angle error calibrating device - Google Patents
Tunnel profiler angle error calibrating device Download PDFInfo
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- CN203432552U CN203432552U CN201320278391.4U CN201320278391U CN203432552U CN 203432552 U CN203432552 U CN 203432552U CN 201320278391 U CN201320278391 U CN 201320278391U CN 203432552 U CN203432552 U CN 203432552U
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- tunnel cross
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- calibrating installation
- section instrument
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Abstract
The utility model discloses a tunnel profiler angle error calibrating device. The device comprises four parts which are a pedestal, a circular protractor, a collimator and computer photoelectric measurement systems. An elevation instrument seat used for placing a tunnel profiler to be calibrated is arranged on the pedestal. The elevation instrument seat adopts a screw-nut structure, the screw is hollow, and the bottom of the screw is equipped with the computer photoelectric measurement system I which is used for calibrating a vertical zeroing point of the tunnel profiler. The circular protractor is equipped with a rotation arm which can be driven to rotate on a vertical working surface, the collimator is installed on the rotation arm, and the tail part of the collimator is equipped with the computer photoelectric measurement system II which is used for measuring and calculating the offset angle of a measurement point of the tunnel profiler. With the tunnel profiler angle error calibrating device provided by the utility model, the problem of lack of a calibration device and a calibration method for tunnel profiler angle error calibration is effectively solved. The calibrating device is convenient in operation and adjustment and is accurate and reliable. The calibration precision is higher than 2.5 seconds.
Description
Technical field
The utility model discloses the calibrating installation of tunnel cross-section instrument angular error, belong to tunnel cross-section detection technique field.
Background technology
Tunnel cross-section detector, be widely used in the accurate detection of all kinds of tunnel cross-sections, at construction monitoring, final acceptance of construction, in the work such as quality control, can obtain quickly and easily profile data, and can be for the acceptance inspeciton to bank protection retaining wall, also can be used for to the rapid scanning of hillside landform and by with the comparing of subgrade Design figure, calculate earthwork, so that accurately contract, the native stone subgrade engineering operation of giving out a contract for a project, greatly facilitated construction, the tissue of supervisor, instruct the work such as examination, for improving construction quality, guarantee engineering safety, shorten construction period, save project funds and have very important effect.
Laser tunnel cross-section detector adopts without cooperative target laser ranging technique, precision angle technology and precision drive technology, Polar Method and computer technology are combined closely, accurately detect at a high speed, without aftertreatment, direct output report, under the help of software for calculation, can automatically complete actual excavation contour line and mate with the space three-dimensional of design excavation contour line, and the out break value between exportable each measuring point and respective design excavation contour line (distance, area).If measure at regular intervals several sections along tunnel axis, can also calculate actual earthwork, super amount of excavation, owe amount of excavation.
The effect aspect tunnel construction construction and tunnel safety monitoring of laser tunnel cross-section detector is great, whether laser tunnel cross-section detector itself accurately also counts for much, in the need calibrations index of tunnel cross-section instrument, mainly contain range error and two parts of angular error, range error can be with reference to existing hand-held laser rangefinder or electronic total station the range error calibration steps without component prism; And angle error there is no calibration steps and correcting device at present.Cannot carry out measurement and calibration to the angular error of tunnel cross-section instrument.
Utility model content
The purpose of this utility model is to propose the calibrating installation of tunnel cross-section instrument angular error, has solved the calibration of angular error of tunnel cross-section instrument without the problem of special-purpose calibrating installation, calibrating installation is easy to operate, calibration result accurately and reliably.
For addressing the above problem, the technical solution adopted in the utility model is:
The calibrating installation of tunnel cross-section instrument angular error, comprises base, angular indexing device, parallel light tube and four parts of computing machine photoeletric measuring system; Burr adjustable tail margin screw is installed, circle bubble and lifting instrument stand on described base; Described burr adjustable tail margin screw and circle bubble are in order to adjust base level; Described lifting instrument stand is calibrated tunnel cross-section instrument in order to settle; Described lifting instrument stand adopts bolt and nut structure, in order to adjust the height that is calibrated instrument; Described screw rod hollow, computing machine photoeletric measuring system one is installed in screw rod bottom, for calibrating the vertical return-to-zero of tunnel cross-section instrument; Described angular indexing device is arranged on lifting instrument stand top, and pivot arm is installed on angular indexing device, can on vertical workplace, rotate by driven rotary arm; Described parallel light tube is arranged on pivot arm, with the rotation of angular indexing device, rotates, and parallel light tube is in rotation process, and object lens direction is all the time in the face of lifting instrument stand, and parallel light tube and angular indexing device are combined to form various standard angles; The imaging surface position of described parallel light tube is provided with weakener and computing machine photoeletric measuring system two, and computing machine photoeletric measuring system two is calculated tunnel cross-section instrument measurement point deviation angle in order to meter.
Aforementioned burr adjustable tail margin screw has 3.
Aforementioned angular indexing device adopts multiteeth indexing table or high accuracy circular indexing sensor.
Aforementioned multiteeth indexing table adopts 552 tooth horizontal axis multiteeth indexing tables, and maximum error is 1 ".
Aforementioned parallel light tube adopts the auto-collimation collimator that focal length is 550mm.
Aforementioned computing machine photoeletric measuring system two adopts Two-dimensional PSD light sensor, CCD frame of reference or CMOS frame of reference.
The utility model has the advantages that:
1, round bubble and burr adjustable tail margin screw have been installed on the base of calibrating installation, calibrating installation base can have been adjusted to level.
2, calibrating installation comprises lifting instrument stand, and for being calibrated the arrangement of tunnel cross-section instrument, instrument stand adopts bolt and nut structure, and capable of regulating is calibrated the height of instrument.
3, calibrating installation lifting screw hollow, computing machine photoeletric measuring system is installed in screw rod bottom, for the calibration of tunnel cross-section instrument return-to-zero.
4, calibrating installation adopts horizontal axis multiteeth indexing table, can driven rotary arm and auto-collimation collimator rotation on vertical workplace.
5, calibrating installation comprises auto-collimation collimator, with the rotation of multiteeth indexing table, rotates, and can be combined to form various standard angles with multiteeth indexing table.
6, calibrating installation adopts computing machine photoeletric measuring system, automatically gathers the side-play amount of tunnel cross-section instrument laser spots and parallel light tube optical axis.
Accompanying drawing explanation
Fig. 1 is the front view of the calibrating installation of the utility model tunnel cross-section instrument angular error;
Fig. 2 is the right view of the calibrating installation of the utility model tunnel cross-section instrument angular error;
Fig. 3 is that the calibrating installation of the utility model tunnel cross-section instrument angular error calculates tunnel cross-section instrument laser spots deviation angle schematic diagram;
Fig. 4 is one-dimensional PSD light sensor sectional schematic diagram;
Fig. 5 is the PSD light sensor flow chart of data processing figure that the utility model adopts;
Fig. 6 is that the calibrating installation of the utility model tunnel cross-section instrument angular error carries out the process flow diagram of angle calibration system to tunnel cross-section instrument;
Fig. 7 is that the calibrating installation of the utility model tunnel cross-section instrument angular error carries out angle calibration system schematic diagram to tunnel cross-section instrument.
Embodiment
Now describe the utility model in detail with embodiment by reference to the accompanying drawings.
As depicted in figs. 1 and 2, the calibrating installation of tunnel cross-section instrument angular error of the present utility model comprises base, angular indexing device 1, parallel light tube 7 and four parts of computing machine photoeletric measuring system.
Burr adjustable tail margin screw 6 is installed, circle bubble 4 and lifting instrument stand 2 on base; Burr adjustable tail margin screw 6 has 3, and according to Triangle-Profile, burr adjustable tail margin screw 6 and circle bubble 4 are in order to adjust base level; The structure that lifting instrument stand 2 adopts screw rod 3 and nut 10 to combine, is calibrated tunnel cross-section instrument in order to settle; Bolt and nut structure can be adjusted the height that is calibrated instrument, screw rod 3 hollows, and computing machine photoeletric measuring system 1 is installed in screw rod 3 bottoms, for calibrating the vertical return-to-zero of tunnel cross-section instrument.
Angular indexing device 1 is arranged on lifting instrument stand 2 tops, pivot arm 9 is installed on angular indexing device 1, angular indexing device 1 can rotate by driven rotary arm 9 on vertical workplace, angular indexing device can adopt multiteeth indexing table or high accuracy circular indexing sensor, preferably, the utility model adopts 552 tooth horizontal axis multiteeth indexing tables, and maximum error is 1 ".
In calibration process, the computation process of tunnel cross-section instrument measurement point deviation angle is as follows: as shown in Figure 3, the laser beam that tunnel cross-section instrument sends is with respect to the deviation angle θ of standard angle, after optical system, on parallel light tube image space focal plane, focus on A point, it is y that A point and parallel light tube optical axis exist difference in height, and the height of measuring y can calculate laser beam deviation angle by following relational expression
In formula, F is parallel light tube focal length.
Preferably, computing machine photoeletric measuring system of the present utility model adopts Two-dimensional PSD light sensor.
PSD is that it is different from charge coupled device ccd based on horizontal photoelectric Optoelectronic Position Sensitive Detector, and it is not that device is divided into many little unit, therefore belongs to non-discrete type device.Meanwhile, its position resolution power is very high, much larger than discrete type devices such as CCD.In addition, it is unique that PSD also has advantages of that spectral response is wide, fast response time, treatment circuit are simple etc.And while measuring, only need record hot spot centre coordinate, and irrelevant with spot size.Because PSD output signal is little current signal, therefore need to be after excess current, voltage transitions, then process through subsequent conditioning circuit.Take one-dimensional PSD as example, and its sectional schematic diagram as shown in Figure 4.
When incident illumination is mapped on the photosurface of PSD, at incidence point, will produce the electric charge that becomes ratio with luminous energy, this electric charge is exported by electrode X1 and X2 by resistive layer.Connect after pull-up resistor, will from electrode X1, X2, obtain respectively electric current I 1 and I2.Wherein I1 and I2 are by laser spots determining positions on PSD.
L in formula---photosurface length, unit is mm;
δ---incident light is to PSD electrical midpoint distance, and unit is mm;
I
1---electrode X1 output current, unit is A;
I
2---electrode X2 output current, unit is A;
The C8051F060 type single-chip microcomputer that the PSD follow-up data disposal system of the utility model calibrating installation adopts U.S. Cygnal company to produce, the A/D converter that portion comprises 16 of 4k internal data memories, 2 tunnel within it and the FLASH program storage of a 64k, can realize online programming.Meanwhile, it also has an outside 64k data-carrier store interface and two with UART serial port, can meet the needs of data acquisition, data processing and data transmission.Because its A/D converter is integrated in single-chip microcomputer inside, therefore avoid using too much peripheral components, can make circuit part more compact.
When PSD receives the light beam sending from tunnel cross-section instrument, export the current signal relevant with beam deviation angle, then through treatment circuit, this electric current is converted into voltage.Two-dimensional PSD can produce the voltage signal X relevant to deviation angle of both direction, Y.By amplitude limiter circuit and level shifting circuit, can be by voltage signal X, Y is converted to 0～V
reflevel signal, V wherein
refrefer to the A/D reference level of single-chip microcomputer C8051FO60.Then, single-chip microcomputer C8051FO60 again by the two-way level signal sampling respectively through the A/D converter of 16, be converted into corresponding digital quantity.By prior demarcation, get well and be stored in the program of single-chip microcomputer inside, just can obtain current two-dimentional deflection.Finally, by serial ports, deflection is sent in serial ports conversion chip, then deliver to computing machine reception & disposal and demonstration, as Fig. 5.
The laser beam of tunnel cross-section instrument can form a very little luminous point on the photosurface of PSD, and computing machine is automatically processed and calculates the laser spots collecting, and obtains the position N of laser spots center on PSD photosurface, with standard laser point position N
0between difference be the side-play amount y of laser beam, by y=N-N
0substitution deviation angle computing formula, and angular unit is scaled to second, can obtain deviation angle:
In formula, ρ is the conversion constant of radian and angle, ρ=206 265.
Below the Two-dimensional PSD photosensitive device resolution 1 μ m that the utility model adopts, by above formula, can be calculated, resolving power of the present utility model at least can reach 0.4 "; consider PSD photosensitive device circuit elements device and temperature impact; measuring accuracy can reach 2 ", the error of adding horizontal axis multiteeth indexing table itself is not more than 1 ", so integrated measurement accuracy of the present utility model is 2.5 ".Due to the angle measurement accuracy of tunnel cross-section instrument be 6 ', this calibrating installation can meet the alignment requirements of tunnel cross-section instrument completely.
Before carrying out the calibration operation of tunnel cross-section instrument angle measurement part, first need calibrating installation itself to calibrate, be specially:
Calibrating installation horizontal zero point calibration: the level point of calibrating installation is the angle measurement calibration starting point of tunnel cross-section instrument, in order to guarantee the accurate combination of zero-bit of 90 degree points with the computing machine photoeletric measuring system of multiteeth indexing table, the correction at calibrating installation level zero point is very important.First, the NI002 type high precision double pendulum position automatic compensated level that we adopt Switzerland Witter to produce, the level of calibration parallel light tube, the optical axis level of assurance parallel light tube." laser transit, in the same burnt and laser coaxial performance of its laser of position correction that surpasses 100 meters to select one 2 again.Laser transit is arranged on the lifting instrument stand of this calibrating installation, with theodolite telescope, aim at parallel light tube center of reticule, open laser instrument, laser spots is imaged on the photosurface of PSD, by imaging point position N now under computing machine photoeletric measuring system one acquisition and recording
0, the zero-bit of Here it is PSD, i.e. standard laser point position.
Calibrating installation sensor accuracy is demarcated: in real work, due to alignment error, parallel light tube focus error etc., error is brought to measurement in capital, and PSD itself is analog device, affected by the factor such as other devices larger, so it is very necessary that system PSD is carried out to linear calibration.Because tunnel cross-section instrument leading indicator is vertical direction angle, we adopt a laser generator and level meter comparator combination unit to demarcate system PSD, because level meter comparator full accuracy reaches 0.3 "; least resolution reaches 0.1 ", in PSD measurement range, get 20 point measurements, and measurement result is carried out to linear revise and deposited computing machine in.
Calibrating installation horizontal zero point calibration and sensor accuracy are demarcated and are carried out when Installation and Debugging, can carry out once every half a year later, during routine use, can proofread and correct.
After finishing, the calibrating installation adjustment of tunnel cross-section instrument angular error can carry out the calibration operation of tunnel cross-section instrument angle measurement part.
As shown in Figure 6 and Figure 7, utilize the workflow that the calibrating installation of tunnel cross-section instrument angular error of the present utility model is calibrated the angle error of indication of tunnel cross-section instrument to be:
1) the tunnel cross-section instrument 11 being calibrated is placed on lifting instrument stand, adjusts tunnel cross-section instrument to suitable height, make circle bubble placed in the middle, laser tunnel cross-section instrument is in running order;
2) open control computer or the handbook of tunnel cross-section instrument, control program brings into operation;
3) vertical return-to-zero calibration, is specially: control tunnel cross-section instrument and vertically make zero, horizontally rotate tunnel cross-section instrument one week, every 90 degree, 4 different positions, read laser spots location variation, variable quantity should be less than 0.5mm;
4) calibrate the tested tunnel cross-section instrument error of indication, be specially:
4-1) in the measurement range of tunnel cross-section instrument, a uniform design 5-8 calibration point, rotates the pivot arm of calibrating installation, angular indexing device is forwarded to the calibration point of selection, reads angular indexing device reading θ
0,
4-2) control the calibration point that tunnel cross-section instrument turns to selection, reading tunnel cross-section instrument angles of display is θ
1,
4-3) read on computers the tunnel cross-section instrument laser spots deviation angle θ that computing machine photoeletric measuring system two calculates, calculate as follows the angle error of indication of this calibration point:
Δθ＝θ
1+θ-θ
0
In formula: the angle error of indication of Δ θ---calibration point
θ
1---tunnel cross-section instrument reading
θ---calibrating installation computing machine photoeletric measuring system two readings
θ
0---calibrating installation angular indexing device reading
5) measure respectively the angle error of indication of each point, what get error of indication maximum is the error of indication that is calibrated tunnel cross-section instrument.
Claims (6)
1. the calibrating installation of tunnel cross-section instrument angular error, is characterized in that: comprise base, angular indexing device, parallel light tube and four parts of computing machine photoeletric measuring system; Burr adjustable tail margin screw is installed, circle bubble and lifting instrument stand on described base; Described burr adjustable tail margin screw and circle bubble are in order to adjust base level; Described lifting instrument stand is calibrated tunnel cross-section instrument in order to settle; Described lifting instrument stand adopts bolt and nut structure, in order to adjust the height that is calibrated instrument; Described screw rod hollow, computing machine photoeletric measuring system one is installed in screw rod bottom, for calibrating the vertical return-to-zero of tunnel cross-section instrument; Described angular indexing device is arranged on lifting instrument stand top, and pivot arm is installed on angular indexing device, and angular indexing device can rotate by driven rotary arm on vertical workplace; Described parallel light tube is arranged on pivot arm, with the rotation of angular indexing device, rotates, and parallel light tube is in rotation process, and object lens direction is all the time in the face of lifting instrument stand, and parallel light tube and angular indexing device are combined to form various standard angles; The imaging surface position of described parallel light tube is provided with weakener and computing machine photoeletric measuring system two, and computing machine photoeletric measuring system two is calculated tunnel cross-section instrument measurement point deviation angle in order to meter.
2. the calibrating installation of tunnel cross-section instrument angular error according to claim 1, is characterized in that: described burr adjustable tail margin screw has 3.
3. the calibrating installation of tunnel cross-section instrument angular error according to claim 1, is characterized in that: described angular indexing device adopts multiteeth indexing table or high accuracy circular indexing sensor.
4. the calibrating installation of tunnel cross-section instrument angular error according to claim 3, is characterized in that: described multiteeth indexing table adopts 552 tooth horizontal axis multiteeth indexing tables, and maximum error is 1 ".
5. the calibrating installation of tunnel cross-section instrument angular error according to claim 1, is characterized in that: described parallel light tube adopts the auto-collimation collimator that focal length is 550mm.
6. the calibrating installation of tunnel cross-section instrument angular error according to claim 1, is characterized in that: described computing machine photoeletric measuring system two adopts Two-dimensional PSD light sensor, CCD frame of reference or CMOS frame of reference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320278391.4U CN203432552U (en) | 2013-05-20 | 2013-05-20 | Tunnel profiler angle error calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320278391.4U CN203432552U (en) | 2013-05-20 | 2013-05-20 | Tunnel profiler angle error calibrating device |
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| CN203432552U true CN203432552U (en) | 2014-02-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004270A (en) * | 2015-08-05 | 2015-10-28 | 云南省公路科学技术研究院 | Tunnel lining section laser detector |
| CN104296643B (en) * | 2014-09-26 | 2017-06-06 | 中国科学院光电研究院 | Angular indexing device and angle error compensation method based on distributed reading head |
| CN107289873A (en) * | 2017-07-28 | 2017-10-24 | 平顶山学院 | The modification method of PSD sensor measurement datas |
-
2013
- 2013-05-20 CN CN201320278391.4U patent/CN203432552U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296643B (en) * | 2014-09-26 | 2017-06-06 | 中国科学院光电研究院 | Angular indexing device and angle error compensation method based on distributed reading head |
| CN105004270A (en) * | 2015-08-05 | 2015-10-28 | 云南省公路科学技术研究院 | Tunnel lining section laser detector |
| CN107289873A (en) * | 2017-07-28 | 2017-10-24 | 平顶山学院 | The modification method of PSD sensor measurement datas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |
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| CX01 | Expiry of patent term |