CN104515572A - Belt weigher based on laser ranging - Google Patents
Belt weigher based on laser ranging Download PDFInfo
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- CN104515572A CN104515572A CN201510014054.8A CN201510014054A CN104515572A CN 104515572 A CN104515572 A CN 104515572A CN 201510014054 A CN201510014054 A CN 201510014054A CN 104515572 A CN104515572 A CN 104515572A
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Abstract
The invention discloses a belt weigher based on laser ranging, and belongs to contactless belt weighers. The belt weigher is characterized in that a laser scanning rangefinder is used for scanning the surfaces of materials so as to obtain a distance value from a laser head to the surface of the material, the shape and the area of the section of the material are obtained through the distance value, the shape and the area of the section of the material are combined with the obtained real-time running speed of a belt by a belt speed measuring equipment so as to obtain the instant volume and weight of the materials conveyed by the belt, and all instant material weights in a random period are summed, so that the weight of materials conveyed in the period can be obtained. The belt weigher uses few facilities and elements, and has the advantages of being simplie in structure, high in measurement precision, high in safety and reliability of operation, and low in implementation cost; the belt weigher is convenient to popularize and apply in various industries using conveying belts.
Description
Technical field
The present invention relates to a kind of belt conveyer scale based on laser ranging, this system relates to laser ranging and the field such as to communicate.
Background technology
Travelling belt is the visual plant of material short-distance transport, is widely used in the production industries such as mine, agricultural, food, tobacco.The quality of Measurement accuracy Belt Conveying material is for the meaning of producing control automatically, output statistics, production control cost have positive important.Belt in current actual production measures main use belted electronic balance and controlled nucleon operated belt conveyor scale.Belted electronic balance utilizes pressure transducer to measure the belt that causes of weight of material to the pressure of sensor, thus realize the measurement to weight of material.Belted electronic balance adopts contact type measurement, and complicated in mechanical structure, comprise carrying roller, lever and various bindiny mechanism, mechanical hook-up is numerous, and the fault of any device all can affect the precision of measurement.So it is low to there is measuring accuracy, the problems such as failure rate is high, maintenance is complicated.Controlled nucleon operated belt conveyor scale is by projecting gamma-rays to the material on belt, gamma-rays is different through the decay caused by different-thickness material, detect through gamma intensity after material, intensity is brought into the material thickness that can to obtain to material component, formula that density is relevant in directions of rays, controlled nucleon operated belt conveyor scale is exactly the measurement realizing material by this ultimate principle.Controlled nucleon operated belt conveyor scale adopts non-contact measurement, overcomes the some drawbacks that belted electronic balance exists, but still there is the problems such as precision is low, Safe Management, demarcation complexity.Also have the principle of some image procossing passed through to carry out the method for belt material measurement at present, but due to precision and exploitativeness aspect, many places, in theory stage, do not form product.
Therefore, a kind of measuring accuracy of needs is high, simple and reliable at present, cost is low, the new method that the travelling belt material being convenient to implement is measured and device.
Summary of the invention
The object of the invention is to provide that a kind of measuring accuracy is high, simple and reliable, cost is low, contactless belt conveyer scale, belt conveyer scale of the present invention mainly forms and comprises: laser scanning and ranging unit, belt speed measuring unit, man-machine interaction unit, data processing unit and communication unit; Laser scanning and ranging unit is arranged on above travelling belt, scanning plane should perpendicular to tangent plane bottom the belt axis of symmetry and belt, sweep limit should be greater than belt width, each scan period can obtain one group of data, each data representation laser head to the distance value on material surface, by these group data reducible go out the cross section shaped upper part of belt and material; Belt speed measuring unit is arranged on belt roller, for obtaining belt movement speed; Man-machine interaction unit comprises button and display screen, and button is used for carrying out setting operation to measurement correlation parameter, and display screen is used for data display; Communication unit is responsible for gathering the scan-data of laser scanning and ranging unit and the signal of belt speed measuring unit, and data processing unit result is sent to miscellaneous equipment by communication port; The signal of data processing unit to the scan-data of laser scanning and ranging unit and belt speed measuring unit processes, and obtains volume and the quality of the material of belt-conveying.
The concrete steps that material is measured are as follows:
1. before measurements, first use laser scanning and ranging equipment to scan to unloaded belt, obtain the cross section shaped upper part data of unloaded belt, be recorded in data processing unit.
2. communication unit receives the belt speed data of range data and the belt speed measuring equipment transmission sent by laser scanning and ranging equipment, and data are reached data processing unit.
3. scan-data and the unloaded scan-data of pre-recorded belt are carried out additive operation by data processing unit, obtain material cross section profile data.
4. the interval time of cross section profile data, belt speed and image data is carried out multiplying, obtain the instantaneous mass volume that in this interval time, travelling belt transmits.
5. volume of material and material density are carried out multiplying and obtain instantaneous mass quality.
6., by all instantaneous mass quality summations in random time section, the quality of material transmitted in this period can be obtained.
7. quality of material data are sent to miscellaneous equipment by the communication port of communication unit; And show related data by the display screen of man-machine interaction unit.
Accompanying drawing explanation
Fig. 1 is based on the belt conveyer scale structural representation of laser ranging.
Fig. 2 equipment scheme of installation.
Fig. 3 material measuring process schematic diagram.
Fig. 4 laser scanning and ranging demarcates the cross-section data schematic diagram gathered.
Fig. 5 laser scanning and ranging measures the instantaneous cross-section data schematic diagram gathered.
Fig. 6 additive operation obtains the instantaneous cross-section data schematic diagram of material.
The instantaneous cross-section data schematic diagram of Fig. 7 material.
Embodiment
As shown in Figure 1 in exemplifying embodiment, described belt conveyer scale composition comprises:
1. laser scanning and ranging unit (101), adopts the laser scanning and ranging instrument (102) that range finding distance is greater than 5 meters.
2. belt speed measuring unit (103), adopts photoelectric coding tachogenerator (104), is directly or indirectly connected with belt roller axle, measures the rotating speed of cylinder in real time, produces the pulse signal be directly proportional to drum rotation speed; Also digital belt speed measuring sensor can be directly selected can directly to export belt speed data.
3. communication unit (105), comprise input port (106) and input port (107), input port part receives the scan-data that laser scanning and ranging instrument (102) sends, and receives tachogenerator (104) signal or data.Data are sent to miscellaneous equipment by data network by output port part, can adopt the network port or on-the-spot port, except cable port, also can use communication.
4. man-machine interaction unit (108), comprises display screen (109) and button (110), and display screen adopts two row dot matrix type LCD LCD MODULE, ken size: 60.5 × 18.0mm, 54.8 × 18.3m.Design use 4 buttons, adopt Independent keys formula keyboard, in conjunction with the display interface of display screen, realize the function of measurement correlation parameter being carried out to setting operation.
5. data processing unit (108), comprise storage chip (109) and processor (110), storage chip adopts 1 24C512,24C512 uses I2C bus communication, use two standard I/O interfaces to add pull-up resistor and connect SCL and SDA pin, realize processor and storage chip Control on Communication.Parameter relevant with measurement in storage chip primary storage, and the cross-section data of the unloaded belt of timing signal.Processor (113) can select the MSP430F147 single-chip microcomputer of TI company.This model is 16 risc architectures, has 32k Flash, 1kRAM; And having abundant sheet inner peripheral module to be convenient to for communication unit provides hardware supported, built-in multiplier is convenient to data operation process.
6. auxiliary circuit (114), except above-mentioned each unit, device also comprises the auxiliary circuits such as power circuit (114) and related elements, for each unit element provides support.
The installation site of laser scanning and ranging unit and belt speed measuring unit is with reference to figure 2:
1., directly over the axis of symmetry of the every bar travelling belt of laser scanning and ranging instrument (12), setting height(from bottom) should higher than height of materials; The scanning plane of laser scanning and ranging equipment perpendicular to tangent plane (202) bottom belt Runtime Infrastructure (201) and belt, and should need ensure that scanning finding range is greater than belt width simultaneously; .
2. the part of data acquisition of belt speed measuring equipment (104) connects the axle of cylinder (203).
The specific works step of described belt conveyer scale is as follows:
1. whether judgment means demarcates (301), as do not demarcated, then carrying out zero load and demarcates (302), can directly measure as demarcated.
2. unloaded demarcation (302), timing signal need use laser scanning and ranging instrument scan to unloaded belt, obtains the cross section shaped upper part data A of unloaded belt
b, as shown in Figure 4, be recorded in storage chip, during each start, automatically stored data called in register.
3. when (303) are measured, the input port of communication unit receives the cross section shaped upper part data A that laser scanning and ranging device scan obtains material on belt
i, as shown in Figure 5, receive belt speed measuring unit up-delivering signal or data simultaneously, obtain real-time belt movement speed v
i, if tachogenerator output signal is pulse signal then v
i=spL π, in formula, s is interpulse period, and p is the pulse sum that namely sensor resolution circles, and L is diameter of cylinder.
4. the unloaded scan-data of belt of scan-data and timing signal record is carried out additive operation S by (304)
i=A
b-A
i, as shown in Figure 6; Computing obtains instantaneous mass cross-section data S
i, as shown in Figure 7.
5. (305) instantaneous cross section profile data are multiplied with the belt speed of acquisition and are multiplied by Δ t interval time of image data again
i, obtain the instantaneous mass measurement volumes V that in this interval time, travelling belt transmits
i, V
i=S
iv
iΔ t
i; Instantaneous mass volume is multiplied by material density q, namely obtains instantaneous mass mass M
i, M
i=V
iq.
6. (306) are by the instantaneous mass mass M in this belt period
icumulative, the quality of material Z transmitted in this period of this belt can be obtained
t,
in formula N be in time period T statistical server to the image data number of times of laser scanning and ranging device scan data, Δ t
ithe larger measuring accuracy of less then N is higher.
7. quality of material data are sent to miscellaneous equipment by the communication port of communication unit by (307); And by LCD display display belt speed and the quality of material accumulating transmission.
Claims (6)
1. based on a belt conveyer scale for laser ranging, it is characterized in that: described belt conveyer scale mainly comprises laser scanning and ranging unit, belt speed measuring unit, man-machine interaction unit, data processing unit and communication unit; Laser scanning and ranging unit is arranged on above travelling belt, for obtaining material cross-section data; Belt speed measuring unit connects belt roller axle, for obtaining belt movement speed; Man-machine interaction unit comprises button and display screen, and button is used for carrying out setting operation to measurement correlation parameter, and display screen is used for data display; Communication unit is responsible for gathering the scan-data of laser scanning and ranging unit and the signal of belt speed measuring unit or data, and data processing unit result is sent to miscellaneous equipment by communication port; Data processing unit processes the signal of the scan-data of laser scanning and ranging unit and belt speed measuring unit or data, obtains volume and the quality of the material of belt-conveying.
2. belt conveyer scale as claimed in claim 1, is characterized in that: laser scanning and ranging equipment is arranged on directly over the axis of symmetry of every bar travelling belt, and setting height(from bottom) should higher than height of materials; The scanning plane of laser scanning and ranging equipment perpendicular to tangent plane bottom the belt axis of symmetry and belt, and should need ensure that scanning finding range is greater than belt width simultaneously.
3. belt conveyer scale as claimed in claim 1, is characterized in that: gather in advance before measurement and store the scan-data of laser scanning and ranging unit when belt is unloaded.
4. belt conveyer scale as claimed in claim 1, is characterized in that: the data that data processing unit process laser scanning and ranging instrument exports, and scan-data and the unloaded scan-data of pre-recorded belt is carried out additive operation, obtains material cross-section data on belt.
5. belt conveyer scale as claimed in claim 1, is characterized in that: as the transmission of belt speed measuring unit is pulse signal, and data processing unit obtains belt speed according to signal frequency and diameter of cylinder.
6. belt conveyer scale as claimed in claim 4, is characterized in that: data processing unit is using the long-pending instantaneous mass volume transmitted as travelling belt in this interval time of the interval time of cross-section data, belt speed and image data; Long-pending as instantaneous mass quality using volume of material and material density; By all instantaneous mass quality summations in random time section, the quality of material transmitted in this period can be obtained.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510014054.8A CN104515572B (en) | 2015-01-13 | 2015-01-13 | Belt conveyer scale based on laser ranging |
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| CN201510014054.8A CN104515572B (en) | 2015-01-13 | 2015-01-13 | Belt conveyer scale based on laser ranging |
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| CN104515572B CN104515572B (en) | 2017-11-28 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989803A (en) * | 2017-05-17 | 2017-07-28 | 安徽理工大学 | The contactless weight calculation of belt feeder and departure warning equipment |
| CN107128661A (en) * | 2017-05-17 | 2017-09-05 | 安徽理工大学 | Contactless Belt Conveying weight calculation and departure warning device |
| CN107179108A (en) * | 2016-03-10 | 2017-09-19 | 内蒙古大学 | Loading machine meter side and weight calculation method and device based on laser scanning and ranging technology |
| CN107727207A (en) * | 2017-09-19 | 2018-02-23 | 安凯 | A kind of optics belt conveyer scale and its measuring method |
| CN108414064A (en) * | 2018-06-01 | 2018-08-17 | 成都睿畜电子科技有限公司 | Remote sensing type material tower weighing-appliance and weighing method |
| CN110031069A (en) * | 2019-04-12 | 2019-07-19 | 东北大学 | A kind of movable weighing belt and application method based on laser ranging |
| CN110902313A (en) * | 2019-12-05 | 2020-03-24 | 天津成科传动机电技术股份有限公司 | Belt pulley contour detection method, device, equipment and storage medium, and conveyor belt flow detection method, device and equipment |
| CN114111921A (en) * | 2021-11-19 | 2022-03-01 | 中国铁建重工集团股份有限公司 | Method and system for monitoring belt slag discharge volume flow of heading machine |
| CN116022524A (en) * | 2022-12-12 | 2023-04-28 | 秦皇岛燕大滨沅科技发展有限公司 | Method for detecting blocking of transfer funnel |
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| CN204535825U (en) * | 2015-01-13 | 2015-08-05 | 中国矿业大学(北京) | Based on the belt conveyer scale of laser ranging |
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| CN2795136Y (en) * | 2005-01-31 | 2006-07-12 | 武汉钢铁(集团)公司 | Laser monitor of bulk material for belt conveyer |
| US20060237238A1 (en) * | 2005-04-20 | 2006-10-26 | Uhlmann Pac-Systeme Gmbh & Co. Kg | Weighing conveyor |
| CN103738698A (en) * | 2013-12-20 | 2014-04-23 | 淮南万泰电子股份有限公司 | Alignment speed measurement device of mining belt conveyor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179108A (en) * | 2016-03-10 | 2017-09-19 | 内蒙古大学 | Loading machine meter side and weight calculation method and device based on laser scanning and ranging technology |
| CN106989803A (en) * | 2017-05-17 | 2017-07-28 | 安徽理工大学 | The contactless weight calculation of belt feeder and departure warning equipment |
| CN107128661A (en) * | 2017-05-17 | 2017-09-05 | 安徽理工大学 | Contactless Belt Conveying weight calculation and departure warning device |
| CN107727207A (en) * | 2017-09-19 | 2018-02-23 | 安凯 | A kind of optics belt conveyer scale and its measuring method |
| CN108414064A (en) * | 2018-06-01 | 2018-08-17 | 成都睿畜电子科技有限公司 | Remote sensing type material tower weighing-appliance and weighing method |
| CN110031069A (en) * | 2019-04-12 | 2019-07-19 | 东北大学 | A kind of movable weighing belt and application method based on laser ranging |
| CN110902313A (en) * | 2019-12-05 | 2020-03-24 | 天津成科传动机电技术股份有限公司 | Belt pulley contour detection method, device, equipment and storage medium, and conveyor belt flow detection method, device and equipment |
| CN114111921A (en) * | 2021-11-19 | 2022-03-01 | 中国铁建重工集团股份有限公司 | Method and system for monitoring belt slag discharge volume flow of heading machine |
| CN116022524A (en) * | 2022-12-12 | 2023-04-28 | 秦皇岛燕大滨沅科技发展有限公司 | Method for detecting blocking of transfer funnel |
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