CN101750253B - Feedback low-temperature bending test method and device for wire harness - Google Patents
Feedback low-temperature bending test method and device for wire harness Download PDFInfo
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- CN101750253B CN101750253B CN2009102180188A CN200910218018A CN101750253B CN 101750253 B CN101750253 B CN 101750253B CN 2009102180188 A CN2009102180188 A CN 2009102180188A CN 200910218018 A CN200910218018 A CN 200910218018A CN 101750253 B CN101750253 B CN 101750253B
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Abstract
The invention discloses a feedback low-temperature bending test method for a wire harness. An incremental encoder is arranged on a motion shaft of a wire harness bending mechanical structure and provides a feedback signal for a singlechip control system. The bending frequency and times and other test information can be observed through a man-machine interaction unit after the singlechip control system processes the feedback signal. An operational order input from the man-machine interaction unit is transmitted to the singlechip control system, and converted into a control signal of a motor controller. The motor controller controls the work of a stepping motor to provide a stable driving force for a bending action execution unit, and the conduction and the test finishing alarm of the tested wire harness in the bending process are monitored through a wire harness on-off feedback circuit and a test finishing alarm circuit. The method overcomes the defects of simple test data, no feedback, subjective judgment, and the like of the conventional devices for the low-temperature bend test for the wire harness.
Description
Technical field
The invention discloses a kind of reaction type wire harness low-temperature bending test method, the experimental provision that is applicable to this method is provided simultaneously, belong to electronic devices and components detection technique field.
Background technology
The situation that wire harness bends at low temperatures is more common in real life; Especially the characteristics such as the cold drying of weather in northern area winter make low temperature environment down the bending wire harness wire harness surface insulation layer and wire harness inner core rate of decay are aggravated; Make wire harness reduce greatly serviceable life, use the product reliability of such wire harness also to descend thereupon.
Wire harness low-temperature bending experimental provision is to detect wire harness in the laboratory at the low temperature environment indispensable equipment in following serviceable life, adopts the mode of simulation staff folding line bundle in the low temperature environment chamber, to carry out simulation test.At present; The focus of the existing wire harness Flexing Apparatus of most laboratory is placed on the damaged situation that how to produce continual and steady bending action and bending back wire harness surface of insulating layer; Whether the wire harness conduction of having ignored in the bending process exists unusually; Do not possess the FEEDBACK CONTROL ability, the data of wire harness bending experiment are simple, and there are more subjective judgement in experimentation and conclusion.
In a word, as experimental facilities, should possess the characteristics of stability, repeatability and metrizability, present wire harness low-temperature bending experimental provision can not satisfy such requirement.
Summary of the invention
The invention discloses a kind of reaction type wire harness low-temperature bending test method, for wire harness anti-bending evaluation in serviceable life under low temperature environment provides the means of measuring more specifically.
The present invention also provides the test unit that is applicable to above-mentioned experimental technique, shortcomings such as the experimental data that has overcome existing wire harness low-temperature bending experimental provision is simple, nothing feedback, subjective judgement.
The technical solution of method of application of the present invention is following:
A kind of reaction type wire harness low-temperature bending experimental provision and method; It is characterized in that: kinematic axis one end of wire harness machinery structure is equipped with incremental encoder in the bending action performance element; Incremental encoder is that single-chip computer control system provides feedback signal when bending tested wire harness; This feedback signal is on the one hand as the control signal of single-chip computer control system (ECU), through single-chip computer control system (ECU) but handle the back through experiment feedback informations such as LCD liquid crystal display immediate observation inflection frequency, bending number of times in the man-machine interaction unit; On the other hand experiment information is saved in data storage circuitry; Flow to single-chip computer control system from man-machine interaction unit input operation instruction; And be converted into the motor controller controls signal; The work of motor controller controls stepper motor provides stable driving force for the bending action performance element; Make this device stable operation, and keep watch on the conduction of tested wire harness in the bending process through wire harness break-make feedback circuit and experiment completion warning circuit and report to the police with testing to accomplish.Before the experiment, wire harness break-make feedback circuit is gone in tested wire harness series connection, and be fixed in the bending action performance element on the physical construction, set and the running experiment device detects the wire harness conduction property.
Wire harness low-temperature bending experimental provision of the present invention has following structure and forms:
This experimental provision is accomplished warning circuit, data storage circuitry formation by man-machine interaction unit, single-chip computer control system (ECU), power take-off unit, bending action performance element, wire harness break-make feedback circuit, experiment.Wherein " man-machine interaction unit " is made up of KEY Matrix button, pull-up resistor R1, R2 and LCD liquid crystal display.Flow to single-chip computer control system (ECU) by the instruction of KEY Matrix key-input operation, after single-chip computer control system (ECU) is handled, show output by the LCD liquid crystal display; " power take-off unit " is made up of electric machine controller and stepper motor.By single-chip computer control system (ECU) send to electric machine controller control command control step motor transmission shaft clockwise, rotate counterclockwise, for the bending action performance element provides reliable and stable driving force, ensure experimental provision stable operation." bending action performance element " is made up of incremental encoder, shaft coupling, machinery mechanism, harness clips, gear, tooth bar, slider slideway, two groups of fixed pulleys and brake cable.Wherein to be installed in wire harness machinery structure motion axle one end through shaft coupling be that single-chip computer control system (ECU) provides feedback signal to incremental encoder; Machinery structure motion axle other end fixed gear also cooperates with the slide block upper rack.Harness clips is used for fixing tested wire harness, and two groups of fixed pulleys are installed in wire harness machinery structure both sides respectively.Brake cable connects slide block and motor transmission shaft through fixed pulley, connects power take-off unit and bending action performance element, and the guarantee bending action is guaranteed pendulum angle and cycle stability in the bending process smoothly." wire harness break-make feedback circuit " is made up of 5V power supply, resistance R 3, R4 and tested wire harness.Wherein two-way is parallel to the RA1 port of ECU after 5V power supply, tested wire harness and current-limiting resistance R4 series connection back and resistance R 3 ground connection, monitors the conduction property of tested wire harness in the bending process in real time; " warning circuit is accomplished in experiment " is made up of current-limiting resistance R5, triode Q3, hummer, light emitting diode.5V power supply, resistance R 5 and be connected to the RC7 port of ECU after light emitting diode is connected.The RC6 port of ECU connects triode Q3 base stage, and triode Q3 collector connects the 5V power supply, and emitter connects hummer.When experiment stopped, buzzer warning, light emitting diode intermittently glimmered and the RC7 port of stop signal through ECU are fed back to man-machine interaction unit and pass through LCD liquid crystal display observation experiment information; " data storage circuitry " is used for storing experiment information, accomplished by the S25FL032A memory module.
The course of work of the present invention is following:
Circuit aspect: at first set wire harness bending angle (can select several angles), inflection frequency, bending mode (number of times and the bending time that can set fixing bending are used for carrying out quantitative experiment) through KEY Matrix button and LCD LCDs at man-machine interaction unit; Through single-chip computer control system (ECU) signal Processing the outside terminal of electric machine controller is controlled.Before the experiment; It is the twin wire operation mode that electric machine controller is set; When opening experiment; The RC0 port output low level of ECU makes triode Q1 be in saturation mode (this moment, Q2 was in cut-off mode), makes SX (FWD) end of electric machine controller hold the (see figure 2) that links to each other with DCM, and motor transmission shaft clockwise rotates.Being installed in the bending action performance element incremental encoder on the wire harness machinery structure motion axle measures machinery structure motion axle rotation data and produces pulse signal and feed back to ECU through the RA0 port; Convert through formula, when bending angle is identical with predetermined angle, RC0 port output high level; RC1 port output low level; Triode Q1 is by triode Q2 conducting, and electric machine controller SX (REV) end links to each other with the DCM end, and motor transmission shaft rotates counterclockwise; When bending angle is identical with predetermined angle once more, accomplish the experiment of one-period; Through measuring in the wire harness break-make feedback circuit voltage with tested wire harness resistance in series R3, utilize the A/D modular converter of ECU again, and data are fed back to ECU via the RA1 port, ECU determines whether stopping experiment through the contrast reference voltage.The bending number of times of gathering in the experimentation, bending angle and bending mode can be passed through LCD liquid crystal display Real Time Observation as the input information of FEEDBACK CONTROL on the one hand, in time preserve data through the S25FL032A memory module on the other hand.When experiment stopped, buzzer warning, the light emitting diode that warning circuit is accomplished in experiment intermittently glimmered and the RC7 port of stop signal through ECU fed back to man-machine interaction unit.
Mechanical aspects: tooth bar is installed in the cross sliding clock upper end in bending action performance element physical construction.When the stepper motor transmission shaft clockwise rotates, transmission shaft pulling brake cable makes cross sliding clock tangential movement in slideway in the bending topworks, and the gear rotation that rack drives is installed in machinery structure motion axle one end makes the machinery structure closed.When the stepper motor transmission shaft rotates counterclockwise, brake cable spurs cross sliding clock round about, and the rotation of rack drives gear makes the machinery structure be returned to initial position, accomplishes one time bending action.In the wire harness bending, it is that electric machine control system provides control signal (seeing Fig. 3, Fig. 4) that the incremental encoder generation feedback signal of the kinematic axis other end returns to single-chip computer control system.
Good effect of the present invention is: contrived experiment device wire harness is accomplished warning circuit through feedback circuit and experiment; Realized that wire harness low-temperature bending experimental provision obtains the ability of experimental data; Form the Different control strategy according to wire harness bending angle demand and bending number of times, realize the purpose of FEEDBACK CONTROL; The design data memory circuit has been realized the memory function of wire harness bending angle with the bending number of times; Utilize single-chip computer control system, realized the Based Intelligent Control of experimentation, make experimentation and conclusion more objective.
Description of drawings
Fig. 1 forms schematic diagram for the invention structure.
Fig. 2 is the invention circuit theory diagrams.
Fig. 3 is invention bending action performance element physical construction front view.
Fig. 4 is invention bending action performance element physical construction vertical view.
1. fixed pulley; 2. brake cable; 3. slideway; 4. gear; 5. cross sliding clock; 6. tooth bar; 7. machinery structure; 8. shaft coupling; 9. incremental encoder; 10. harness clips.
Embodiment
According to shown in Figure 1; Be converted into control signal from the operational order of man-machine interaction unit button input through single-chip computer control system (ECU) and flow to electric machine controller the power take-off unit, the motor controller controls stepper motor operates as the bending action performance element stable driving force is provided.The bending action performance element is that single-chip computer control system provides feedback signal through the incremental encoder that is installed in the rotation axis place in the tested wire harness of bending.This feedback signal on the one hand as the control signal of single-chip computer control system (ECU) through single-chip computer control system (ECU) but handle experiment feedback informations such as the LCD liquid crystal display immediate observation inflection frequency of back through man-machine interaction unit, bending number of times; On the other hand experiment information is saved in data storage circuitry.Keeping watch on the conduction of tested wire harness in the bending process through wire harness break-make feedback circuit and experiment completion warning circuit reports to the police with testing to accomplish.
According to shown in Figure 2, form man-machine interaction unit by KEY Matrix button, pull-up resistor R1, R2 and LCD liquid crystal display.Wherein the DB0 of LCD liquid crystal display ~ DB7 port is connected with RD0 ~ RD7 port of ECU, the Presentation Function of data after having realized the setting of wire harness low-temperature bending experimental machine function and having tested completion; Electric machine controller is as the power take-off unit control section.By the operational order of man-machine interaction unit input after the ECU conversion; By the RC0 of ECU, the mode of operation that RC1 port output high-low level is controlled electric machine controller triode Q1, Q2; Thereby electric machine controller is handled the clockwise rotating and rotate counterclockwise, turn-off of conducting, transmission shaft of stepper motor in the control power take-off unit, makes the stepper motor steady operation realize the stable output of driving force; Incremental encoder is as bending action performance element circuit part, and its SIGN port is connected with the RA0 port of ECU, for ECU provides feedback signal; This feedback signal compares with preset value the back after formula converts in the inner realization of ECU A/D conversion, has realized the feedback function of wire harness low-temperature bending experimental machine.Through the conduction property of tested wire harness in the wire harness break-make feedback circuit supervision experiment, wire harness break-make feedback circuit is made up of 5V power supply, resistance R 3, R4 and tested wire harness.Wherein two-way is parallel to the RA1 port of ECU after 5V power supply, tested wire harness and current-limiting resistance R4 series connection back and resistance R 3 ground connection, monitors the conduction property of tested wire harness in real time; " warning circuit is accomplished in experiment " is made up of current-limiting resistance R5, triode Q3, hummer, light emitting diode.5V power supply, resistance R 5 and be connected to the RC7 port of ECU after light emitting diode is connected.The RC6 port of ECU connects triode Q3 base stage, and triode Q3 collector connects the 5V power supply, and emitter connects hummer.When experiment stopped, buzzer warning, light emitting diode intermittently glimmered and the RC7 port of stop signal through ECU are fed back to man-machine interaction unit, through LCD liquid crystal display viewing test data." data storage circuitry " is used for storing the data in the experimentation, accomplished by the S25FL032A memory module.The S25FL032A memory module is connected with RC2 ~ RC5 port of ECU, through spi bus mode Data transmission, has realized the experimental data memory function.
According to shown in Figure 3; Slide block 5 is under the effect of brake cable tractive force; In slideway 3, move horizontally, be fixed with tooth bar 6 on the slide block 5 and when slide block moves horizontally, drive and be fixed on machinery gear 4 rotation, fixed pulley 1 is installed in fixedly brake cable 2 of machinery structure 7 both sides.When the stepper motor transmission shaft changeed clockwise, motor transmission shaft drive brake cable was walked around fixed pulley pulling rack slide and in slideway, is moved, and makes the rack drives gear, the bending mechanism entry into service.When the stepper motor transmission shaft rotated counterclockwise, rack slide moved round about, the counter-rotating of rack drives gear, and bending mechanism is returned to initial position, thereby accomplishes bending action one time.
According to shown in Figure 4, incremental encoder 9 is fixed on an end of machinery structure motion axle through shaft coupling 8.Incremental encoder is in 7 work of machinery structure, for ECU provides feedback signal.Harness clips 10 is used for fixing tested wire harness.
Claims (2)
1. reaction type wire harness low-temperature bending test method; It is characterized in that: kinematic axis one end of wire harness machinery structure is equipped with incremental encoder in the bending action performance element; Incremental encoder is that single-chip computer control system provides feedback signal when bending tested wire harness; This feedback signal is passed through LCD liquid crystal display immediate observation inflection frequency in the man-machine interaction unit, bending number of times experiment feedback information as the control signal of single-chip computer control system but handle the back through single-chip computer control system; Simultaneously experiment information is saved in data storage circuitry; Flow to single-chip computer control system from man-machine interaction unit input operation instruction; And be converted into the motor controller controls signal; The work of motor controller controls stepper motor provides stable driving force for the bending action performance element; Make this device stable operation, and keep watch on the conduction of tested wire harness in the bending process through wire harness break-make feedback circuit and experiment completion warning circuit and report to the police with testing to accomplish; Before the experiment, wire harness break-make feedback circuit is gone in tested wire harness series connection, and be fixed in the bending action performance element on the physical construction, set and the running experiment device detects the wire harness conduction property.
2. according to the device of the said experimental technique of claim 1; It is characterized in that: constitute by man-machine interaction unit, single-chip computer control system, power take-off unit, bending action performance element, wire harness break-make feedback circuit, experiment completion warning circuit, data storage circuitry; Wherein, Man-machine interaction unit is made up of KEY Matrix button, pull-up resistor R1, R2 and LCD liquid crystal display; Flow to single-chip computer control system by the instruction of KEY Matrix key-input operation, after single-chip computer control system is handled, show output by the LCD liquid crystal display; Power take-off unit is made up of electric machine controller and stepper motor, by single-chip computer control system send to electric machine controller control command control step motor transmission shaft clockwise, rotate counterclockwise, for the bending action performance element provides reliable and stable driving force; The bending action performance element is made up of incremental encoder, shaft coupling, machinery structure, harness clips, gear, tooth bar, slider slideway, two groups of fixed pulleys and brake cable; Incremental encoder is installed in wire harness machinery structure motion axle one end through shaft coupling, for single-chip computer control system provides feedback signal; Machinery structure motion axle other end fixed gear also cooperates with the slide block upper rack; Harness clips is used for fixing tested wire harness, and two groups of fixed pulleys are installed in wire harness machinery structure both sides respectively; Brake cable connects slide block and motor transmission shaft through fixed pulley, connects power take-off unit and bending action performance element; Wire harness break-make feedback circuit is made up of 5V power supply, resistance R 3, R4 and tested wire harness; Two-way is parallel to the RA1 port of single-chip computer control system after 5V power supply, tested wire harness and current-limiting resistance R4 series connection back and resistance R 3 ground connection, monitors the conduction property of tested wire harness in the bending process in real time; Experiment is accomplished warning circuit and is made up of current-limiting resistance R5, triode Q3, hummer, light emitting diode, 5V power supply, resistance R 5 and be connected to the RC7 port of single-chip computer control system after light emitting diode is connected; The RC6 port of single-chip computer control system connects triode Q3 base stage, and triode Q3 collector connects the 5V power supply, and emitter connects hummer.
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| CN2009102180188A CN101750253B (en) | 2009-12-16 | 2009-12-16 | Feedback low-temperature bending test method and device for wire harness |
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| CN2009102180188A CN101750253B (en) | 2009-12-16 | 2009-12-16 | Feedback low-temperature bending test method and device for wire harness |
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| CN101750253B true CN101750253B (en) | 2012-05-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102288494A (en) * | 2010-06-21 | 2011-12-21 | 鸿富锦精密工业（深圳）有限公司 | Plug lead wire bending test system and method thereof |
| CN104458434B (en) * | 2014-12-19 | 2017-02-01 | 积架宝威汽车配件(深圳)有限公司 | Service life test device of car connecting wire |
| CN105445128B (en) * | 2015-12-16 | 2018-08-07 | 三棵树涂料股份有限公司 | The quickly device and its detection method of detection paint film elasticity |
| CN109269919A (en) * | 2017-07-18 | 2019-01-25 | 郑州宇通客车股份有限公司 | A kind of Wire bundle testing apparatus |
| CN113008710A (en) * | 2019-12-04 | 2021-06-22 | 广州华工弈高科技有限公司 | Flexible circuit bending and folding life performance detection system based on shaftless bending |
| CN112414868A (en) * | 2020-11-10 | 2021-02-26 | 亿嘉和科技股份有限公司 | Wire harness testing device |
| CN112414875A (en) * | 2020-11-10 | 2021-02-26 | 天津富通光缆技术有限公司滨海新区分公司 | Test method and device for evaluating L-direction bending performance of long axis of butterfly-shaped optical cable |
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