CN102707081A - On-line measurement device for residue soil discharge volume in shield construction based on laser velocity measurement - Google Patents
On-line measurement device for residue soil discharge volume in shield construction based on laser velocity measurement Download PDFInfo
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- CN102707081A CN102707081A CN2012102008916A CN201210200891A CN102707081A CN 102707081 A CN102707081 A CN 102707081A CN 2012102008916 A CN2012102008916 A CN 2012102008916A CN 201210200891 A CN201210200891 A CN 201210200891A CN 102707081 A CN102707081 A CN 102707081A
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- laser velocimeter
- laser
- residue soil
- soil discharge
- shield construction
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- Excavating Of Shafts Or Tunnels (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to an on-line measurement device for residue soil discharge volume in shield construction based on laser velocity measurement and belongs to the technical field of shield construction. A laser velocimeter is arranged tightly close to the residue soil discharge position of a residue soil outlet of a spiral conveyor, and the arrangement position needs to be perpendicular to a residue soil surface; and a control unit is an embedded computing system and is a mainboard consisting of a singlechip and peripheral serial communication interface circuits, and the mainboard is connected with the laser velocimeter and an upper computer through serial communication interfaces. Velocity data of the laser velocimeter is acquired by the singlechip, and is simply processed and then saved in a data memory, then the saved data is transmitted to the upper computer, and integral computation is carried out by the upper computer according to the preset outlet cross section to obtain the volume. The blank in an on-line and accurate residue soil discharge volume measurement method in the current shield construction process is made up by the device disclosed by the invention, and the on-line and accurate residue soil discharge volume measurement in the shield construction can be realized in the residue soil discharge process of the spiral conveyor.
Description
Technical field
The present invention relates to be applied to the engineering machinery of shield-tunneling construction, be specially the unearthed volume on-line measurement device of a kind of shield-tunneling construction based on laser velocimeter.
Background technology
Waste weighing system: the title that two covers are measured the native weight of quarrel is installed below band conveyor; Belt speed sensor with the native weight of excavation quarrel that adds up in real time between being referred to as connects; Operating personnel observe this circulation casting weight that shows on the monitor screen, and compare with a last circulation calibration theoretical weight.On the middle 8.75mEPB of Hong Kong KCRC project DB320 constructing tunnel, just used this kind system.
Spiral tropometer numerical expression: in setting-up time, the worm conveyor revolution speed of screw is counted, measured volume.
Measurement of discharge method: at the worm conveyor soil-discharging port electromagnetic flowmeter is set, measures flow.
Utilize the scheme of ultrasonic measurement: on the band conveyor of constant speed motion, more ultrasonic measuring point is set, measures the casting cross section, obtain the casting volume through integration.
The measurement scheme of laser type: adopt the principle of laser ranging that the Laser Measuring fixed point is set on the band conveyor of constant speed motion, continuous coverage casting cross section can read section configuration, obtains volume through integration again.
The metering system to the dregs volume mainly is following three kinds in the shield-tunneling construction at present:
1) the rear battery truck is weighed and is obtained dregs weight, obtains volume divided by density again.This method lags behind, and automaticity is also low, and proterties, the density of the excavation soil body is also inconsistent in the construction, and often difference is very big, and the unearthed volumetric errors that obtains like this is bigger;
2) at the cross-sectional area that dregs on the two-dimensional scan sensor scan conveyor is installed above the band conveyor, the rate integrating with conveyor obtains the dregs volume again.Also there are a lot of problems in this method, and for example because the speed that worm conveyor soil outlet place belt advances is very fast, the speed of being unearthed is relatively slow; Cause dregs often to be broken; Very irregular section occurs and have a large amount of spaces, serious unfounded phenomenon can appear in the cross-sectional area that laser scanning obtains, in addition because environment is abominable in the subway shield tunnel construction, the space is narrow and small; Be easy to the sensor lens of making dirty, possibly damage expensive laser sensor on the one hand; On the other hand, also can bring problem to the use reliably and with long-term of whole measuring system;
3) at the worm conveyor soil-discharging port electromagnetic flowmeter is set, measures flow.The ratio of precision that this method reaches is lower.
Summary of the invention
The objective of the invention is to overcome the defective of prior art; Remedy online in the current shield-tunneling construction process, accurately measure the blank of casting volume method; The present invention provides a kind of shield-tunneling construction casting volume on-line measurement device based on profile scanning, is implemented in the process that the worm conveyor dregs discharges the unearthed volume in can online accurate measurement shield-tunneling construction.
The present invention realizes through following technical scheme; The unearthed volume on-line measurement device of a kind of shield-tunneling construction based on laser velocimeter; It comprises laser velocimeter, support, power supply, DB25 interface and control module that the laser velocimeter sensor is installed and host computer composition, wherein:
Said laser velocimeter is installed in the position of discharging near worm conveyor soil outlet dregs, and the installation site of laser velocimeter must be vertical with soil body surface, and laser velocimeter carries display and shows the speed of being unearthed in real time;
The fixing screw machine of said support one end is unearthed and manages other end fixed laser knotmeter;
Said power supply links to each other with laser velocimeter through the DB25 connector, thereby supplies power to laser velocimeter.
Said control module is an embedded computing system, the mainboard of mainly forming by single-chip microcomputer and peripheral serial communication interface circuit, and mainboard all is to be connected through serial communication interface with laser velocimeter, host computer.Single-chip microcomputer is gathered the speed data of laser velocimeter, and is kept in the data-carrier store after speed data simply handled, and then the data of storage is passed to host computer, and host computer carries out integral and calculating according to preset outlet xsect, obtains volume.
Because the unearthed mouth of pipe cross-sectional area of screw machine is fixed, so can speed and the area integral that laser velocimeter records just can be obtained volume.Measurement mechanism beneficial effect of the present invention:
1) laser velocimeter carries display function, shows the speed of screw machine soil outlet in real time, and automaticity is high;
2) laser velocimeter is mounted in screw machine soil outlet place, the problem of the measuring accuracy weakening that causes can not occur being broken owing to dregs;
3) the laser velocimeter resistance to shock is better, can adapt to abominable shield-tunneling construction environment, and measuring accuracy is high;
4) scope of application of this device is very wide, is confined to incessantly in the shield-tunneling construction, goes for the occasion of the irregular powdery object of a lot of on-line measurements, as long as possess certain viscosity, can be full of soil outlet, comparatively closely knitly all can reach higher measuring accuracy.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is done further to introduce.
Fig. 1 measuring principle figure.
Fig. 2 laser velocimeter scheme of installation.
Fig. 3 prior art single-chip microcomputer basic composition.
Fig. 4 SCM system structural drawing.
Fig. 5 system software schematic flow sheet.
Description of symbols: 1-is a dregs, 2-screw machine soil outlet, 3-support, 4-laser velocimeter, 5-helical pipe, 6-band conveyor.
Embodiment
Apparatus of the present invention mainly are made up of support, power supply, the DB25 interface of laser velocimeter, sensor installation.Because the environment at screw machine soil outlet 2 places is poor, the space is very narrow, and soil outlet is very little from the distance of band conveyor 6, and the important technique measure that apparatus of the present invention are taked when mounted has:
(1) as shown in Figure 1, laser velocimeter 4 is installed in the position of discharging near worm conveyor soil outlet dregs 1, receive gravity effect less here, can measure the accurate speed of soil outlet.And the installation site of laser velocimeter must be vertical with soil body surface.
(2) as shown in Figure 2; Support 3 one ends are welded on helical pipe 5; Support 3 other ends are drilled with threaded hole, and the laser velocimeter base plate has the threaded hole that carries, so can knotmeter be fixed on the support 3 through Bolt Connection; Guarantee laser velocimeter fixation, accurate, prevent to use after a period of time because the position deviation that reasons such as vibration and gravity cause.
(3) supposing that dregs soil body moving direction is the x direction, vertically is the z direction, and another vertical direction is the y direction.Laser velocimeter can not rotate around the x axle, but allows to exist the minute angle deviation around y, z axle.As shown in Figure 2.
Laser velocimeter is not the contribution that the present invention makes prior art originally as prior art in the technical scheme.The laser velocimeter model of in this invention, selecting for use is InteliSENSL1525, and producer is the rich Electronic Products Inc. of rising.The principle of the unearthed speed of this laser velocimeter measurement is that the soil body that the laser velocimeter aligning moves sends two bundle laser, laser beams intersect angled and even distribution of formation and light and dark striped (fringe spacing is by optical maser wavelength and beam angle decision).The laser of moving surface reflected back is dispersion shape during through candy strip, so just can regulate laser intensity through the frequency (being so-called Doppler frequency) that the speed with moving surface is directly proportional.Need not do any mark on motion thing surface.Laser probe can be collected reflected light and convert thereof into electric signal.The complex calculations rule adds that the calculating of High Performance DSP (digital signal processor) can guarantee that the degree of accuracy of actual speed can reach 0.05% even better.
Laser velocimeter carries display, so measured speed can be read from display.
Laser velocimeter adopts civil power as power supply, and the civil power of 100V ~ 240V AC converts 19V DC to through mains adapter direct supply is that laser velocimeter provides power supply through the DB25 interface connector.
Said control module is an embedded computing system, the mainboard of mainly forming by single-chip microcomputer and peripheral serial communication interface circuit, and mainboard all is to be connected through serial communication interface with laser velocimeter, host computer.Single-chip microcomputer is gathered the speed data of laser velocimeter, and is kept in the data-carrier store after speed data simply handled, and then the data of storage is passed to host computer, and host computer carries out integral and calculating according to preset outlet xsect, obtains volume.
Single-chip microcomputer has selected 8051 for use when design, it accomplishes the collection of data as the core component of control module, and image data is carried out existing in the memory RAM after the simple pre-service.The 8051st, the single-chip microcomputer that INTEL Corp. produces is known, and it mainly contains 8 parts forms, like Fig. 4, shown in Figure 5:
Data-carrier store (RAM) and sheet internal program storer (ROM) in 18 the central processing unit, sheet;
32 parallel input/output port line (4 8 mouth PO, Pl, P2, P3);
Two Timer;
A serial port is used for data serial communication;
Interrupt Control System;
Special function register (SFR);
And shake and clock circuit in a sheet.
What laser velocimeter was exported is digital signal, and through the RS422 transmission, and host computer has the RS232 interface, so need on the control module mainboard, design the RS422 serial ports, has realized the communication of upper and lower computer then through the conversion of RS422/RS232.
The data that the sensor laser velocimeter records utilize transceiver MAX483E to send to serial ports RS422 bus; Single-chip microcomputer switches to P3.0 and P3.1 pin with the serial ports pin from P1.6 and P1.7 after receiving the total data that transmits through serial ports pin P1.6, P1.7; Through the MAX232 level transferring chip RS232 serial ports that data are sent to PC is got on again; Make PC receive the data that transmit from single-chip microcomputer, and carry out integral and calculating, obtain volume according to preset outlet xsect.
As shown in Figure 5, the computer software flow chart of data processing.
Laser velocimeter is installed in the soil outlet place and measures the speed of being unearthed in real time, because the cross-sectional area of soil outlet is known, cross-sectional area just can obtain the casting amount in a period of time to rate integrating.
Claims (2)
1. the unearthed volume on-line measurement device of the shield-tunneling construction based on laser velocimeter is characterized in that, comprises support, power supply, DB25 interface and the control module and the host computer of laser velocimeter, the said laser velocimeter sensor of installation, wherein:
Said laser velocimeter is installed in the position of discharging near worm conveyor soil outlet dregs, and the installation site of laser velocimeter must be vertical with soil body surface;
The fixing screw machine of said support one end is unearthed and manages other end fixed laser knotmeter;
Said power supply links to each other with laser velocimeter through the DB25 connector, thereby supplies power to laser velocimeter;
Said control module is an embedded computing system, and by the mainboard that single-chip microcomputer and peripheral serial communication interface circuit are formed, mainboard all is to be connected through serial communication interface with laser velocimeter, host computer.
2. single-chip microcomputer is gathered the speed data of laser velocimeter, and is kept in the data-carrier store after speed data simply handled, and then the data of storage is passed to host computer, and host computer carries out integral and calculating according to preset outlet xsect, obtains volume.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102008916A CN102707081A (en) | 2012-06-19 | 2012-06-19 | On-line measurement device for residue soil discharge volume in shield construction based on laser velocity measurement |
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| CN2012102008916A CN102707081A (en) | 2012-06-19 | 2012-06-19 | On-line measurement device for residue soil discharge volume in shield construction based on laser velocity measurement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115695A (en) * | 2015-08-26 | 2015-12-02 | 中交第二航务工程局有限公司 | Method for measuring critical flow velocity of slurry shield pipeline |
| CN108022027A (en) * | 2018-02-06 | 2018-05-11 | 苏交科集团股份有限公司 | A kind of Forecasting Methodology of shield through the amount of being unearthed during country rock contact band |
| CN110926426A (en) * | 2019-12-03 | 2020-03-27 | 西安科技大学 | Real-time detection device and detection method for residual muck volume of subway shield segment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201322603Y (en) * | 2008-12-23 | 2009-10-07 | 沈阳华岩电力技术有限公司 | Bulk material volume measuring device |
| CN101581588A (en) * | 2009-06-05 | 2009-11-18 | 江苏大学 | Universal type cereal flow measuring device |
| EP2246673A1 (en) * | 2009-04-28 | 2010-11-03 | Sick Ag | Method for determining the volume of loads and device |
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2012
- 2012-06-19 CN CN2012102008916A patent/CN102707081A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201322603Y (en) * | 2008-12-23 | 2009-10-07 | 沈阳华岩电力技术有限公司 | Bulk material volume measuring device |
| EP2246673A1 (en) * | 2009-04-28 | 2010-11-03 | Sick Ag | Method for determining the volume of loads and device |
| CN101581588A (en) * | 2009-06-05 | 2009-11-18 | 江苏大学 | Universal type cereal flow measuring device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115695A (en) * | 2015-08-26 | 2015-12-02 | 中交第二航务工程局有限公司 | Method for measuring critical flow velocity of slurry shield pipeline |
| CN105115695B (en) * | 2015-08-26 | 2017-05-31 | 中交第二航务工程局有限公司 | Method for determining slurry shield pipeline critical flow velocity |
| CN108022027A (en) * | 2018-02-06 | 2018-05-11 | 苏交科集团股份有限公司 | A kind of Forecasting Methodology of shield through the amount of being unearthed during country rock contact band |
| CN108022027B (en) * | 2018-02-06 | 2021-06-25 | 苏交科集团股份有限公司 | Prediction method for soil output when shield passes through surrounding rock contact zone |
| CN110926426A (en) * | 2019-12-03 | 2020-03-27 | 西安科技大学 | Real-time detection device and detection method for residual muck volume of subway shield segment |
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Application publication date: 20121003 |