CN102169030A - Automatic detection device of forklift meter assembly - Google Patents
Automatic detection device of forklift meter assembly Download PDFInfo
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- CN102169030A CN102169030A CN2010106005763A CN201010600576A CN102169030A CN 102169030 A CN102169030 A CN 102169030A CN 2010106005763 A CN2010106005763 A CN 2010106005763A CN 201010600576 A CN201010600576 A CN 201010600576A CN 102169030 A CN102169030 A CN 102169030A
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Abstract
The invention discloses an automatic detection device of a forklift meter assembly, mainly comprising a computer, a single-chip microcomputer, a constant voltage source switching circuit, a constant current source circuit, an analog quantity circuit, an image acquisition card, a CCD camera and an optical lens. By using the automatic detection device of forklift meter assembly to detect, the detection time is saved, the labor intensity is reduced and the accuracy and consistency of the detection are also improved; and the quality management and traceability of product henceforth are facilitated by using the computer to collect, judge and file the detection result and data.
Description
Technical field
The present invention relates to the detection technique field, relate in particular to a kind of fork truck instrument assembly automatic detection device.
Background technology
Annual China in 2009 sells fork truck and reaches 138,908, and wherein home sale is 111,350.China has the manufacturing enterprise of tame fork truck more than 50 now, and the large-scale fork truck manufacturer of main flow mainly contains several families esbablished corporations such as Anhui fork truck group, Hangzhou fork truck company limited, and this enterprise of a few family occupies the domestic market share more than 90%.Meanwhile, China global now the fourth-largest fork truck market, industry flourish also attracting more investment activity, external leading vendor such as Toyota, Lin De etc. are joint at home successively founds the factory.
The fork truck instrument assembly is as the crucial fork truck accessory of indispensability, be interface and the interactive interface that driver and fork truck carry out information interchange, it is the important ingredient of information system for driver, along with modern fork truck technology and development of electronic technology, electronics demonstration intuitively of multifunction high-precision, high sensitivity, reading and CCD image display instrument table are constantly used on fork truck.The thing followed is that the examination and test of products is proposed higher requirement.
Because the machinery of the pointer of each instrument assembly and table board is installed all difference to some extent, must correct the error of bringing thus by instrument check equipment.Usually manufacturing plant will carry out 100% online detection calibration to the Forklift Combination Instrument assembly, and project comprises:
(1), all kinds of gauge pointer is at the indicating positions at several main scales place, judge and the target scale between deviation.
(2), check the whether neglected loading of various signal lamps, alarm lamp, illuminating lamp, whether normally light, whether color correct.
(3), whether wire harness connects reliable in the instrument assembly.
The main at present manual detection that adopts, its method is: estimate the deviation between instrument assembly actual value and the pointer value, manual then calibration is checked check meter and is judged whether product quality is qualified.This method is influenced by each subjective factor easily.As proofer's observation angle, observed range difference, the misalignment angle of the pointer of being seen and target scale mark will be different, people's degree of fatigue and carelessness etc. in addition, all caused the manual detection method error big, poor reliability, omission, efficient are low, can not satisfy the robotization requirements of large-scale production.Still can not guarantee 100% the rate that is up to the standards (being zero-fault), and the requirement that violent competition and car load factory improve day by day between the current fork truck industry has not allowed all even 0.1% defective existence.
Therefore develop fork truck instrument assembly Automatic Measurement Technique, realize instrument assembly intellectuality, robotization, high precision, quality testing fast to improve the quality of products, are shortened the production cycle, reduce cost, have great importance.
Summary of the invention
The objective of the invention is to be at the deficiencies in the prior art, a kind of fork truck instrument assembly automatic detection device is provided.
The objective of the invention is to be achieved through the following technical solutions: a kind of fork truck instrument assembly automatic detection device, it mainly is made up of computing machine, single-chip microcomputer, constant pressure source commutation circuit, constant-current source circuit, analog quantity circuit, image pick-up card, CCD camera and optical lens; Wherein, described computing machine links to each other with single-chip microcomputer, and single-chip microcomputer links to each other with constant pressure source commutation circuit, constant-current source circuit and analog quantity circuit respectively, and computing machine links to each other with image pick-up card, image pick-up card links to each other with the CCD camera, and CCD camera and optical lens are fixed together.
The invention has the beneficial effects as follows: former test to instrument assembly is only limited to the test of single component, or manually stirs adjusting by dozens of switch or potentiometer.Manpower and time cost are all very big, and easily make mistakes.The present invention in conjunction with computer technology, has reached the purpose that all tests are finished in disposable programmed control by combinations thereof, and not only having saved the test duration has reduced labour intensity but also improved the accuracy and the consistance of test.And retaining is gathered, judges, deposited to test result and data by computing machine, be convenient to the quality management of product from now on and review.
Description of drawings
Fig. 1 is the block diagram of system of the present invention;
Fig. 2 is common positive pilot lamp test circuit;
Fig. 3 is common cloudy pilot lamp test circuit;
Fig. 4 is a pointer gauge test philosophy circuit diagram;
Fig. 5 is a power supply switch circuit;
Fig. 6 is the software flow pattern of computing machine;
Fig. 7 is the software flow pattern of single-chip microcomputer.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail, it is more obvious that purpose of the present invention and effect will become.
As shown in Figure 1, device mainly is made up of computing machine, single-chip microcomputer, constant pressure source commutation circuit, constant-current source circuit, analog quantity circuit, image pick-up card, CCD camera and optical lens.Computing machine links to each other with single-chip microcomputer, and single-chip microcomputer links to each other with constant pressure source commutation circuit, constant-current source circuit and analog quantity circuit respectively, and computing machine links to each other with image pick-up card, and image pick-up card links to each other with the CCD camera, and CCD camera and optical lens are fixed together.
Image pick-up card, CCD camera, optical lens and computing machine are formed the ccd image acquisition system.Image pick-up card is 1394 card or network interface cards, and 1394 cards are serial interface standards with video Data Transmission speed that ieee standardization is organized to set up.The same with USB, 1394 also support the peripheral hardware hot plug, can be peripheral hardware simultaneously power supply is provided, save the power supply that peripheral hardware carries, supported synchronous data transmission.Network interface card is the network components that is operated in data link layer, it is the interface that connects computing machine and transmission medium in the LAN (Local Area Network), can not only realize and the LAN (Local Area Network) transmission medium between physical connection and electric signal coupling, also relate to encapsulation and opening, medium access control, the encoding and decoding of data and the function of metadata cache etc. of the transmission of frame and reception, frame.When adopting 1394 cards, 1394 communication protocol images.The CCD camera is an area array CCD, and pixel request is at least 640 * 480 colored CCDs.The time shutter of CCD camera is by software control.According to the brightness regulation time shutter of measured object.Gain and the white balance of CCD are got fixed value.The output of each pixel RGB of CCD is at least 12 numerical value.Image planes are of a size of 1/3 or 1/2 inch.
The CCD camera adopts aperture manually or automatically to regulate, and focal length is the manual or automatic focusing imaging lens of 25 ㎜ to 50 ㎜.The CCD camera is positioned at the preceding 500 ㎜ places of fork truck instrument assembly, to fork truck instrument assembly complete imaging.
Constant-current source circuit is used for the LED light on the test instrumentation assembly.Constant-current source circuit has two kinds, and a kind of is the NPN circuit, as shown in Figure 2, adapts to the LED light of cloudy connection altogether.Another kind is the PNP circuit, as shown in Figure 3, adapts to the LED light of positive connection altogether.
In Fig. 2, single chip circuit output high level makes the Q1 conducting to photoelectric coupled device Q1 input end, and test circuit is started working.Resistance R 1 connects the collector of photoelectric coupled device Q1, another termination power+5V of resistance R 1.Resistance R 2, R3 are connected in parallel on the emitter of photoelectric coupled device Q1.The base stage of another termination NPN triode Q2 of resistance R 2, the other end ground connection of resistance R 3.Behind the Q1 input high level, provide base current to triode.The positive pole of LED 1 is with the base stage of NPN triode Q3 and be connected in the emitter of NPN triode Q2, the minus earth of LED 1.LED1 flows through certain electric current indicating operating status and constant ground level operating voltage is provided for triode Q3.Current-limiting resistance R4 meets power supply+12V, the collector of another termination NPN triode J2 of resistance R 4.Resistance R 5 connects the emitter of NPN triode Q3, the other end ground connection of resistance R 5.Resistance R 5 is used to control the electric current that tested pilot lamp L1 is crossed in steady flow.
In Fig. 3, CPU output high level makes the Q4 conducting to photoelectric coupled device Q4 input end, and test circuit is started working.Resistance R 6 connects the collector of photoelectric coupled device Q4, another termination power+5V of resistance R 6.Resistance R 7, R8 one end also connect the emitter of photoelectric coupled device Q4, the base stage of another termination NPN triode Q5 of resistance R 7, the other end ground connection of resistance R 8.Current-limiting resistance R9 meets power supply+12V, and the other end of resistance R 9 and resistance R 10 also connect the collector of NPN triode Q5.The negative pole of the other end of resistance R 10 and LED 2 also connects the base stage of PNP triode J6.Anodal and the joining power+12V of the end of current-limiting resistance R11 and LED 2, the emitter of another termination PNP triode Q6 of resistance R 11.LED 2 produces a constant operating voltage for triode Q6 and indicates the duty of test circuit.Measured pilot lamp L2 one end ground connection, the collector of another termination PNP triode Q6.
The analog quantity circuit is used for the pointer gauge on the test instrumentation assembly.The circuit diagram of measuring a certain pointer gauge is referring to Fig. 4.
One termination power of resistance R 12+5V, base stage and the Single-chip Controlling signal input port 1 of an end and NPN triode Q7 link.2 pin of the collector connecting relay RL1 of NPN triode Q7.1 pin of relay R L1 meets power supply+12V, gives relay R L1 power supply, and 3 pin of relay R L1 connect the positive pole of table 1, gives table 1 power supply, and 4 pin of relay R L1 meet power supply+24V, and 5 pin of relay R L1 meet power supply+12V.The high-low level of Single-chip Controlling port one makes triode Q7 conducting or ends, and makes single-pole double-throw (SPDT) relay R L1 gating power+24V or power supply+12V insert pointer gauge 1.
Resistance R 13, one termination power of R14+5V, an end and NPN triode Q8, the base stage of Q9 and Single-chip Controlling signal input port 2,3 link.NPN triode Q8, the collector connecting relay RL2 of Q9,1 pin of RL3.Relay R L2,2 pin of RL3 meet power supply+12V, give relay R L2, the RL3 power supply.Relay R L2,3 pin of RL3 connect the SIG end of tested pointer gauge 1, as the input end of signal.Relay R L2,4 pin of RL3 connect the potentiometer RV1 of two different resistances and 3 pin of potentiometer RV2 respectively.Connect the potentiometer of different resistances, the value difference of pointer gauge 1 indication.2 pin of potentiometer RV1 are in parallel with 3 pin, and 2 pin of potentiometer RV2 are in parallel with 3 pin.The negative pole of 1 pin of potentiometer RV1 and 1 pin of potentiometer RV2 and table 1 is ground connection together.The resistance of potentiometer RV1 or potentiometer RV2 mixes up in advance.
The high-low level of Single-chip Controlling port 2,3 makes triode Q8, and Q9 conducting or end makes single-pole single-throw (SPST) relay R L2, the RL3 gating.Work as RL2, when RL3 did not have gating, pointer gauge was positioned at reference position.When RL2 gating resistance R V1, tested list index points to the centre position.When RL2 and the equal gating of RL3, the pointed maximum position of tested table.Handle by ccd image, judge the accuracy of gauge pointer position.
The constant pressure source commutation circuit: actual instrument assembly power supply has 12V, the branch of 24V, its voltage regulator has the branch of 14.8V and 28.8V again, and at the test of relay one power supply than big electric current output must be arranged, and all these all must make things convenient for when test provides out freely.So designed with next group constant pressure source switched system, to satisfy the test request of each assembly.The circuit details are seen Fig. 5.
The minus earth of 12V power supply B1, positive pole connect an end of contactor J1-1 normally opened contact, and the minus earth of 24V power supply B2, positive pole connect an end of contactor J1-2 normally closed contact.After CPU sends signal for contactor J1, J1-1 normally opened contact closure, the J1-2 normally closed contact is opened.One end of another termination contactor J2-2 normally closed contact of contactor J1-1 normally opened contact, an end of another termination contactor J2-1 normally opened contact of contactor J1-2 normally closed contact.The negative pole of one end of the other end of contactor J2-1 normally opened contact and the other end of J2-2 normally closed contact, contactor J3-2 normally closed contact, an end of contactor J5-1 normally opened contact, 2.8V power supply B4, the negative pole of 4.8V power supply B5 also connect an end of contactor J6-1 normally opened contact.The other end of contactor J3-2 normally closed contact and the other end of contactor J5-1 normally opened contact, 200V voltage table B6 anodal also connects an end of contactor J3-1 normally opened contact.One end of the other end of contactor J3-1 normally opened contact and contactor J4-1 normally opened contact also connects an end of contactor J4-2 normally closed contact.The positive pole of another termination 2.8V power supply B4 of contactor J4-2 normally closed contact, the positive pole of another termination 4.8V power supply B5 of contactor J4-1 normally opened contact.The positive pole of another termination 15A power supply B3 of contactor J6-1, the minus earth of power supply B3.The minus earth of 200V voltage table B6.Voltage table B6 is used to show the size of output voltage.Power supply B4, B5 are used for regulation voltage, produce the output of 14.8V and 28.8V voltage.
As the computer operation process of host computer as shown in Figure 6, as the single-chip microcomputer course of work of slave computer as shown in Figure 7.
During work, single-chip microcomputer, constant pressure source commutation circuit, constant-current source circuit and analog quantity circuit link to each other with the fork truck instrument assembly of test respectively.The course of work of the present invention is as follows:
1, stopwatch is measured
Provide regulated power supply to stopwatch.The display screen of electronic timepiece shows reference clock, and whether the ccd image acquisition system is discerned the displaying contents on the display screen automatically, and judges whether the variation of each field of display screen is normal, accurate when walking.Change the voltage of regulated power supply, judge that with ccd image stopwatch is working properly the operating voltage range planted agent who requires.
2, water-thermometer, oil thermometer, fuel level gauge, the measurement of oil pressure gauge
Kind according to table provides different operating voltage with model.Operating voltage may be 12V or 24V.Operating voltage is by the break-make gating of Single-chip Controlling relay.Every table is measured three working positions, initial position, centre position and the maximum indicating positions of pointer.The position of pointer is changed by Single-chip Controlling analog quantity circuit.Analog quantity is the resistance of a series of different resistances.The adjusted good and together corresponding epiphase coupling of the resistance of these resistance.Select different resistance to insert in the loop of each table by the break-make of pilot relay.Because the resistance difference, the size of current that flows through table is different, and the pointer position of table is just different.Utilize CCD the image position and the error in judgement of identification pointer automatically.
3, the measurement of luminotron
Luminotron divides LED luminotron and osram lamp two classes.The LED luminotron is by constant current source power supply.The Single-chip Controlling constant-current source circuit according to the setting of different LED luminotron electric current, utilizes relay to connect corresponding constant current source, and different electric currents is provided.Osram lamp is powered by constant pressure source.The Single-chip Controlling constant voltage power supply circuit according to the setting of different osram lamp voltages, utilizes relay to connect corresponding constant pressure source, and different voltage is provided.Utilize ccd image to measure the brightness and the color of luminotron automatically.
The present invention utilizes ccd image treatment technology and Single-chip Controlling by combinations thereof, has reached the disposable purpose of finishing all tests.And can gather, judge, deposit retaining to test result and data, be convenient to the quality management of product from now on and review.
Claims (1)
1. a fork truck instrument assembly automatic detection device is characterized in that, it is mainly by computing machine, single-chip microcomputer, constant pressure source commutation circuit, constant-current source circuit, analog quantity circuit, image pick-up card, CCD camera with optical frames is first-class forms; Wherein, described computing machine links to each other with single-chip microcomputer, and single-chip microcomputer links to each other with constant pressure source commutation circuit, constant-current source circuit and analog quantity circuit respectively, and computing machine links to each other with image pick-up card, image pick-up card links to each other with the CCD camera, and CCD camera and optical lens are fixed together.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106005763A CN102169030A (en) | 2010-12-22 | 2010-12-22 | Automatic detection device of forklift meter assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106005763A CN102169030A (en) | 2010-12-22 | 2010-12-22 | Automatic detection device of forklift meter assembly |
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| CN102169030A true CN102169030A (en) | 2011-08-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102778587A (en) * | 2012-06-29 | 2012-11-14 | 惠州市德赛西威汽车电子有限公司 | Method and device for measuring shaking of meter indicating needle |
| CN103759755A (en) * | 2013-12-21 | 2014-04-30 | 柳州航盛科技有限公司 | Upper computer operating system of test device of combined instrument of automobile |
| CN104535849A (en) * | 2014-10-20 | 2015-04-22 | 北汽福田汽车股份有限公司 | Switch module and combined instrument test system with switch module |
| CN105129678A (en) * | 2015-09-11 | 2015-12-09 | 苏州市新瑞奇节电科技有限公司 | Monitor system for forklift truck |
| CN112651382A (en) * | 2021-01-15 | 2021-04-13 | 北京中科虹霸科技有限公司 | Focusing data calibration system and iris image acquisition system |
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| CN105129678A (en) * | 2015-09-11 | 2015-12-09 | 苏州市新瑞奇节电科技有限公司 | Monitor system for forklift truck |
| CN112651382A (en) * | 2021-01-15 | 2021-04-13 | 北京中科虹霸科技有限公司 | Focusing data calibration system and iris image acquisition system |
| CN112651382B (en) * | 2021-01-15 | 2024-04-02 | 北京中科虹霸科技有限公司 | Focusing data calibration system and iris image acquisition system |
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Application publication date: 20110831 |