CN102514966A

CN102514966A - Signal acquisition device of correction controller

Info

Publication number: CN102514966A
Application number: CN2011103838445A
Authority: CN
Inventors: 徐耀良; 赵万剑; 杨宁; 王博; 张一丹
Original assignee: Shanghai University of Electric Power
Current assignee: Shanghai University of Electric Power; University of Shanghai for Science and Technology
Priority date: 2011-11-28
Filing date: 2011-11-28
Publication date: 2012-06-27

Abstract

The invention relates to a signal acquisition device of a correction controller, wherein the light emitted by a high-brightness LED (light-emitting diode) is directly focused to the detected object via a first convex lens; the reflected light on the detected object is rectilinearly propagated to a third convex lens via a second convex lens; the light of the third convex lens is focused to TCS230 colour sensors; the light signal received by the TCS230 colour sensors is conveyed to a single chip; the single chip processes and outputs data; two TCS230 colour sensors are used and placed on a PCB (printed circuit board) up and down; and the positions of the transversal parts of the two TCS230 colour sensors are superposed, and the transversal superposition distance must be less than the width of a reference guide wire. The detection blind zone of the correction controller is efficiently eliminated; and the control accuracy of the correction controller in either edge guiding mode or line detection mode can meet even exceed the present requirements of industrial field.

Description

A kind of signal pickup assembly of deviation correcting device

Technical field

The present invention relates to a kind of signal detection, particularly a kind of signal pickup assembly of deviation correcting device.

Background technology

Deviation correcting device mainly solves band object sideslip problem, sideslip be meant such as pliability band objects such as paper, plastics be in operation because of receive can not control effort effect can not keep linear running, make its line of centers depart from reference center's line.In the actual production link, because reference center is divided into limit and two kinds of situation of line, so in deviation-rectifying system, generally be divided into inspection edge mode and inspection ray mode, inspection limit model is as shown in Figure 1, and the inspection line model is as shown in Figure 2.

If sideslip is not corrected, will influence product design, increase the energy and raw materials consumption.Along with the development of producing, the huge economic benefit that the automatic deviation correction technology is brought has caused the attention of the domestic departments and institutions concerned.Deviation correcting device is used very extensively, and the field that at present domestic and international deviation correcting device is used comprises: steel industry, light metal industry, coppersmith industry, printing and bookbinding industry, plastics and film industry, rubber chemistry industry, paper-making industry, fiber and textile industry.

Especially in the packing dyeing, correction control is essential.The material lateral position control in control system and the motion is led on suitable limit, is the basic demand of numerous manufacturings today.Though the very fraction that control system has only been represented the manufacturing line cost is led on the limit, they have great influence to the total cost of manufacturing line and the quality of final products.Adopting the limit to lead the direct effect that control system reaches is to reduce the number of rejects and seconds, improve the quality of products, improve the capacity rating and the speed of production of whole unit significantly, and these effects have further improved profit.

At present; The theoretical investigation that color sensor is used for deviation correcting device has only Yin Jie. the development [D] of convex print system middle controller. and Shanghai: Shanghai University; 2007. master thesis; A kind of novel color sensor that the author selects for use---TCS230 not only has advantages such as line array CCD resolution is high, the collection fast speed is fast, and can tell multicolour, is applicable to the coiled material correction environment of different colours; Actv. solves and uses the deviation correcting device of conventional photoelectric sensor not rectify a deviation by the mode of color to coiled material.

In the paper design deviation correcting device about in the collecting sensor signal device; Adopted the complementary design of a kind of three sensors; The PCB that makes is as shown in Figure 3; U1, three sensors of U2 and U3 become down " article " font to arrange, and the adding of sensor U3 mainly is the detection blind area that produces therebetween for the restriction of eliminating U1, U2 pin distance when the side circuit plate welds.

The operating mode model that can obtain under the inspection ray mode as shown in Figure 2 is described according to paper design.When actual industrial was made, the width between centers of the adjacent pad of U1 and two sensors of U2 was at least 1.4mm, and the detection blind area L between the two sensors is at least 1.4mm so.Deviation correcting device is under the inspection ray mode in the general actual industrial scene; As shown in Figure 2; The width of its benchmark clearance line between 0.5-2mm, and at benchmark clearance line width d at d <under the situation of 1.4mm, when benchmark clearance line among a small circle change in location in U1, U2 detect the blind area can not cause the reliable variation of U3 detection signal: a in like Fig. 2; Under two kinds of situation of b; Widthwise size takes place in benchmark clearance line position is the change in displacement of e, but owing to the area coverage to U3 does not change, the U3 detection signal strength is constant.Therefore, this moment, deviation correcting device just increased the error e that can not correct of 0.1mm at least on original basis, and e=L-d is under the limiting case of 0.5mm at benchmark clearance line L, can not will reach 0.9mm by rectification error e=L-d.And deviation correcting device is a high-precision device, and general correction control setup its correction precision under the inspection ray mode will reach ± 0.3mm at least, and therefore, a such blind area is not allowed to.

Summary of the invention

The present invention be directed to the problem of the detection blind area that exists in the sensor acquisition device of deviation correcting device; A kind of signal pickup assembly of deviation correcting device has been proposed; As long as the benchmark clearance line is greater than 0.5mm; Then any change in the detection range of sensor of benchmark clearance line can both cause effective variation of sensor signal, has realized that benchmark clearance line non-blind area in certain width range detects in real time.

Technical scheme of the present invention is: a kind of signal pickup assembly of deviation correcting device; The light that high-brightness LED lamp sends directly focuses to testee through first convex lens, and reflected light on the testee is through the second convex lens rectilinear propagation to the, three convex lens; The light of the 3rd convex lens focuses on the TCS230 color sensor; The TCS230 color sensor receives optical signal and send micro controller system, micro controller system processing data output, and said TCS230 color sensor is selected two TCS230 color sensors held on the pcb board for use; Two TCS230 color sensor lateral part location overlaps, the distance of lateral overlap must be less than the width of benchmark clearance line.

The width of said benchmark clearance line is more than 0.5mm, in the optional 0-0.5mm scope of said overlapping distance.

Beneficial effect of the present invention is: the signal pickup assembly of deviation correcting device of the present invention; Effectively eliminate the detection blind area of deviation correcting device, no matter deviation correcting device is that the inspection edge mode or the control accuracy of inspection ray mode can both reach even be higher than present industry spot requirement.

Description of drawings

Fig. 1 is controlled object inspection limit illustraton of model;

Fig. 2 is controlled object inspection line model figure;

Fig. 3 is that TCS230 falls " article " font structure PCB and schemes in the prior art;

Fig. 4 is the complementary staggered layout of the signal pickup assembly two sensors of deviation correcting device of the present invention;

Fig. 5 is the signal pickup assembly circuit diagram of deviation correcting device of the present invention;

Fig. 6 is the signal pickup assembly sensor acquisition device index path of deviation correcting device of the present invention.

The specific embodiment

Set forth according to the background technology the inside; When deviation correcting device existing not enough staggered layout type of complementation that proposes to use two sensors under the inspection ray mode; The PCB layout of two sensors is as shown in Figure 4; The surveyed area of two sensors produces among a small circle overlapping in the horizontal, lateral overlap apart from e in the 0-0.5mm scope.At this moment, need only the benchmark clearance line greater than 0.5mm, then any change in the detection range of sensor of benchmark clearance line can both cause effective variation of sensor signal, the detection blind area that therefore can effectively eliminate deviation correcting device.As shown in Figure 4; Wherein 4 (a) are the benchmark clearance line left avertence of detected object, and 4 (b) are the benchmark clearance line right avertence of detected object, can find out; No matter the small left avertence of benchmark clearance line or the right avertence of detected object can cause the marked change of two sensor areas.

This harvester adopts independent MCU to carry out acquisition of signal and processing, can carry out data with controller through serial ports and transmit, and does not increase hardware resource expense and system's operation burden of master controller.

The C8051F330 micro controller system that the MCU of this harvester adopts, the circuit diagram of acquisition system is as shown in Figure 5.

Fig. 6 is the index path of collecting sensor signal device; The light that high-brightness LED lamp sends directly focuses to testee through convex lens 1; After illumination is incident upon testee; Produce reflected light from object, to convex lens 3, the light that convex lens 3 spread out of directly focuses on the TCS230 color sensor through convex lens 2 rectilinear propagations.The TCS230 color sensor receives the frequency of exporting behind the optical signal and will change thereupon, and micro controller system is gathered the TCS230 output frequency, and carries out suitable judgement and data handing just can be exported by micro controller system.

Harvester is in order to avoid the influence of external light source to harvester, the airtight installation of whole harvester as far as possible.

Hardware resource expense that the design's advantage has been not only to reduce ground has realized that also benchmark clearance line non-blind area in certain width range detects in real time.

The design-calculated harvester links to each other with actuating unit with master controller voluntarily; Test experimentizes; Experiment test is the result show; At percentage error is that 16mm/s, coiled material running velocity are that 4m/s and actuating unit speed are under the condition of 24mm/s, when the benchmark clearance line in the 0.5-2mm scope, no matter deviation correcting device is that the inspection edge mode or the control accuracy of inspection ray mode can both reach even be higher than present industry spot requirement.

Claims

1. the signal pickup assembly of a deviation correcting device, the light that high-brightness LED lamp sends directly focuses to testee through first convex lens, reflected light on the testee; Through the second convex lens rectilinear propagation to the, three convex lens; The light of the 3rd convex lens focuses on the TCS230 color sensor, and the TCS230 color sensor receives optical signal and send micro controller system, the output of micro controller system processing data; It is characterized in that; Said TCS230 color sensor is selected two TCS230 color sensors held on the pcb board for use, two TCS230 color sensor lateral part location overlaps, and the distance of lateral overlap is less than the width of benchmark clearance line.

2. according to the signal pickup assembly of the said deviation correcting device of claim 1, it is characterized in that the width of said benchmark clearance line is more than 0.5mm, in the optional 0-0.5mm scope of said overlapping distance.