CN117310345B - Wire harness testing equipment and method based on FPGA - Google Patents
Wire harness testing equipment and method based on FPGA Download PDFInfo
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- CN117310345B CN117310345B CN202311487664.0A CN202311487664A CN117310345B CN 117310345 B CN117310345 B CN 117310345B CN 202311487664 A CN202311487664 A CN 202311487664A CN 117310345 B CN117310345 B CN 117310345B
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 78
- 238000001514 detection method Methods 0.000 claims abstract description 57
- 238000004088 simulation Methods 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 238000005070 sampling Methods 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011002 quantification Methods 0.000 abstract description 2
- 238000012800 visualization Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003953 foreskin Anatomy 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a wire harness testing device and method based on an FPGA, which relate to the technical field of wire harness testing and comprise the following steps: a work table; the upper end of the device is fixedly provided with a conveying device; the simulation detection devices are arranged on the workbench at equal intervals, the wire harness is fixed by the conveying device and then conveyed into the simulation detection devices, and the simulation detection devices are arranged as sliding sealing mechanisms with two sides driven by corresponding first driving mechanisms; the recovery device is arranged in the workbench and is used for recovering the wire harnesses subjected to batch corresponding detection; according to the invention, the FPGA can simulate the same or different experimental conditions and takes the transmission data of the wire harness as a reference, and can obtain the data result with higher accuracy, visualization and quantification under various conditions after being processed, so as to further judge the manufacturing quality of the wire harness.
Description
Technical Field
The invention relates to the technical field of wire harness testing, in particular to wire harness testing equipment and method based on an FPGA.
Background
Wiring harnesses are important components in electronic devices for transmitting electrical current and signals. As the complexity of electronic devices increases, the complexity of the wire harness increases, and thus, testing the wire harness becomes an important link for ensuring the performance and stability of the electronic devices. The traditional wire harness test equipment is realized by hard wires or relay arrays, has weak capability of simulating environmental conditions, cannot carry out strain requirements on the wire harness in various environmental states, and cannot obtain accurate, visual and quantifiable data to judge the quality of the wire harness.
Accordingly, it is desirable to provide an FPGA-based harness testing apparatus and method to solve the above-mentioned problems in the related art.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: an FPGA-based harness testing device and method, comprising:
the upper end of the workbench is fixedly provided with a conveying device;
the simulation detection devices are arranged on the workbench at equal intervals, the wire harness is fixed by the conveying device and then conveyed into the simulation detection devices, and the simulation detection devices are arranged as sliding sealing mechanisms with two sides driven by corresponding first driving mechanisms; and
and the recovery device is arranged in the workbench and is used for recovering the wire harnesses of which the batch corresponding detection is completed.
Further, preferably, the analog detection apparatus includes:
the sealing partition plate is respectively embedded at the output end of the first driving mechanism, joint limiting mechanisms are slidably arranged at the upper end and the lower end in the sealing partition plate, and three groups of guide rails are correspondingly and fixedly arranged in the sealing partition plate;
the wire harness limiting mechanism can be vertically and slidably limited on the guide rail;
the wire opening mechanism is arranged in the sealing plate and can be vertically and slidably arranged on the guide post, and the guide post is fixedly arranged on the sealing plate.
Further, preferably, a heating component, a humidifying component and a wind power component controlled by an environment simulation module are arranged in the sealing plate.
Further, as an optimization, an interface electrically connected with the host and the slave is correspondingly arranged in the sealing plate, the interface connected with the host is based on a signal generated by the DDS, the output end of the DDS signal is communicated with a voltage signal source module and a current signal source module, the interface connected with the slave is communicated with a voltage sampling module and a current sampling module, and the voltage sampling module and the current sampling module are connected with the FPGA.
Further, as the preference, pencil stop gear is two sets of that upper and lower symmetry set up, and two sets of structures are the same, and it includes vertical slip set up in first direction cylinder body and deflector on the guide rail, the output of first direction cylinder body is fixed with the base plate, just the base plate horizontal slip set up in on the deflector, it is provided with guide wheel and spacing wheel to rotate on the base plate, just the opposite side of baffle is provided with second actuating mechanism, and it can drive the ascending motion of deflector vertical direction.
Further, preferably, the wire opening mechanism includes:
the second guide cylinder body is fixedly arranged on the sealing plate, the output end of the second guide cylinder body is fixedly provided with a movable flat plate, and a guide mechanism is arranged on the movable flat plate;
and the open line overlap joint assembly is arranged on the movable flat plate.
Further, preferably, the open lap assembly includes:
the output end of the third driving mechanism is hinged with a preset seat which can slide relatively;
the wire cutter is fixedly arranged in the preset seat, wedge-shaped media are movably arranged in the preset seat, and the wedge-shaped media are connected with the inner wall of the preset seat through connecting springs.
Further preferably, the length of the line opening knife is smaller than the length of the wedge medium.
Further, preferably, the wedge-shaped media in the plurality of groups of analog detection devices are all different in material.
A test method of a wire harness test device based on an FPGA, comprising the steps of:
s1, firstly, adjusting and fixing the longitudinal distance of a joint limiting mechanism according to the length of a wire harness, embedding the joint of the wire harness into the joint limiting mechanism, and placing the wire harness into a guide wheel, a limiting wheel and the guide mechanism;
s2, the conveying device supplies fixed wire harnesses to the positioning and supplying positions of the analog detection devices in batches;
s3, starting a first driving mechanism, sealing the wire harness to be detected by a sealing plate, and plugging the joint of the synchronous wire harness with the interface;
s4, performing primary test under normal conditions, wherein the DDS controls the voltage signal source module and the current signal source module to generate corresponding detection signals, a wire harness is used as a carrier to convey the detection signals to the voltage sampling module and the current sampling module, and the FPGA reads and computes the transmission results and finally obtains the test results in each simulation detection device;
s5, starting an environment simulation module, simulating the same environment conditions and different environment conditions by a plurality of groups of simulation detection devices, controlling the DDS to generate signals, reading and transmitting results by the FPGA to operate, and finally obtaining test results in each simulation detection device for comparison;
s6, under the condition of simulating the stretching of the wire harness, the wire harness stretching method can be divided into the following steps:
a. only the simulation stretching of the whole wire harness is carried out, two groups of wire harness limiting mechanisms or two groups of wire harness limiting mechanisms move in opposite directions, the whole wire harness is stretched, signals are connected, the FPGA reads and transmits results to operate, and finally test results in all simulation detection devices are obtained to be compared;
b. the simulation stretching of the wire harness and the joint, the joint limiting mechanism and the wire harness limiting mechanism which are arranged on the same upper part or the same lower part move in opposite directions, the upper joint and the wire harness or the lower joint and the wire harness are synchronously or respectively stretched, the signals are connected in parallel, the FPGA reads the transmitted results to operate, and finally test results in all simulation detection devices are obtained to be compared;
c. the simulated stretching of different wire opening positions among the wire harnesses, the extension of the second guide cylinder body, the deflection of the third driving mechanism, the control of the cutting depth thickness of the wire opening knife according to the wrapping thickness of the wire harnesses, the wire opening knife is far away from the wire harnesses after the wire opening is completed, the wire opening at different positions on the wire harnesses is simulated by a plurality of groups of simulated detection devices, and the steps a and b are repeated;
d. c, repeating the step a and b to stretch the wire harness or the wire harness and the connector after the wire harness is opened, controlling the thickness of the wire harness cutter for deflection and depth cutting, enabling the wedge-shaped medium to be abutted against the wire harness position, connecting signals, reading and calculating the transmitted result by the FPGA, and finally obtaining the test result in each simulation detection device for comparison;
the steps described above may be continued with additional S5 or otherwise independently tested and S1-S4 operations repeated.
Compared with the prior art, the invention provides the wire harness testing equipment and the method based on the FPGA, which have the following beneficial effects:
according to the invention, the equipment can simulate the same or different environmental conditions, correspondingly stretch the joints of the wire harness segments and the wire harness or the middle area of the wire harness, stretch the wire harness in a split area without medium lap joint or stretch the wire harness in a split area without medium lap joint, and compound and overlap the wire harness in a single or two or more effects, so that under the same or different experimental conditions and based on the transmission data of the wire harness, the FPGA can obtain data results (waterproof performance test, high and low temperature test, conductivity test, voltage and current test, abnormal signal detection and tension test) with higher accuracy and quantification under various conditions, and further judge the manufacturing quality of the wire harness.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;
FIG. 3 is a schematic diagram of a simulation test apparatus according to the present invention;
FIG. 4 is a schematic view of a guiding mechanism according to the present invention;
FIG. 5 is a schematic view of an open lap assembly according to the present invention;
FIG. 6 is a schematic diagram of an open position area in the present invention;
in the figure: 1. a work table; 2. a transfer device; 3. an analog detection device; 4. a recovery device; 31. a sealing plate; 32. a joint limiting mechanism; 33. a guide rail; 34. a wire harness limiting mechanism; 35. a wire opening mechanism; 341. a guide wheel; 342. a limiting wheel; 343. a first guide cylinder; 351. moving the flat plate; 352. a second guide cylinder; 353. a guide mechanism; 354. an open lap assembly; 3541. a first guide plate; 3542. a second guide plate; 3543. a wire cutter; 3544. wedge-shaped medium; 3545. and a connecting spring.
Detailed Description
Referring to fig. 1 to 6, in an embodiment of the present invention, a wire harness testing device based on an FPGA includes:
a workbench 1, the upper end of which is fixedly provided with a conveying device 2;
the simulation detection devices 3 are arranged on the workbench 1 at equal intervals, the wire harness is fixed by the conveying device 2 and then conveyed into the simulation detection devices 3, and the simulation detection devices 3 are arranged as sliding sealing mechanisms with two sides driven by corresponding first driving mechanisms; and a recovery device 4 provided in the table 1 for recovering the wire harnesses subjected to the batch correspondence detection;
in the actual use process, n wire harnesses to be detected are selected randomly from the batch of wire harnesses, longitudinal spacing is adjusted according to the length of the wire harnesses and fixed in the simulation detection device 3, then embedded wire harnesses and joints are guided into the simulation detection device 3, the conveying device 2 detects the wire harnesses which are fixed in a batch manner and are supplied to the positioning of each simulation detection device 3, and the detected wire harnesses are recovered through the recovery device 4.
Referring to fig. 2 and 3, the analog detecting apparatus 3 includes:
the sealing plate 31 is respectively embedded in the output end of the first driving mechanism, the joint limiting mechanisms 32 are slidably arranged at the upper end and the lower end in the sealing plate 31, and three groups of guide rails 33 are correspondingly and fixedly arranged in the sealing plate 31;
the wire harness limiting mechanism 34 is vertically limited on the guide rail 33 in a sliding manner, the wire harness limiting mechanism 34 can clamp the wire harness, and the wire harness limiting mechanism can also stretch a non-joint area of the wire harness;
the wire opening mechanism 35 is arranged in the sealing plate 31, the wire opening mechanism 35 is vertically and slidably arranged on a guide column, and the guide column is fixedly arranged on the sealing plate 31;
in the simulated stretching process of the wire harness, the two groups of joint limiting mechanisms 32 move in opposite directions, and the whole wire harness after the two joints are spliced is stretched; the two groups of wire harness limiting mechanisms 34 move in opposite directions, and stretch the middle area of the wire harness; the joint limiting mechanism 32 and the wire harness limiting mechanism 34 which are arranged on the same upper side or the same lower side move in opposite directions, and the upper end joint and the wire harness or the lower end joint and the wire harness are synchronously or respectively stretched, so that the joint and the wire harness and the middle area of the wire harness can be ensured to be covered and detected.
As a preferred embodiment, the enclosure plate 31 is internally provided with a heating component, a humidifying component and a wind component controlled by an environmental simulation module, so that the multiple groups of simulation detection devices 3 can simulate the same environmental conditions (same temperature, same humidity, same wind), different environmental conditions (same temperature, same temperature and same humidity, same wind/same temperature, same temperature and same wind, same temperature and same humidity and same wind/same temperature and same humidity, same humidity and same wind, same temperature and same wind, etc.), thereby simulating variable control of the wire harness under different environmental influences, and synchronously testing the waterproof performance and high and low temperature of the wire harness.
As a preferred embodiment, an interface electrically connected to the host and the slave is further correspondingly disposed in the blocking board 31, the interface connected to the host uses a signal generated by the DDS as a reference, an output end of the DDS signal is communicated with a voltage signal source module and a current signal source module, the interfaces connected to the slave are communicated with a voltage sampling module and a current sampling module, and the voltage sampling module and the current sampling module are both connected to the FPGA;
that is, it can detect dielectric-free continuity test, voltage and current test, abnormal signal detection of the wire harness by the generated voltage or current.
Referring to fig. 3, in this embodiment, the wire harness limiting mechanism 34 is two groups that are vertically and symmetrically disposed, and the two groups have the same structure, and includes a first guiding cylinder 343 and a guiding plate that are vertically slidably disposed on the guiding rail 33, an output end of the first guiding cylinder 343 is fixed with a substrate, and the substrate is horizontally slidably disposed on the guiding plate, a guiding wheel 341 and a limiting wheel 342 are rotatably disposed on the substrate, and a second driving mechanism is disposed on the other side of the sealing plate 31, and can drive the guiding plate to move in the vertical direction, and the guiding wheel 341 guides and positions the wire harness, and clamps the wire harness through the limiting wheel 342.
Referring to fig. 3 and 4, in the present embodiment, the wire opening mechanism 35 includes:
a second guide cylinder 352 fixedly provided on the sealing plate 31, wherein a moving plate 351 is fixed to an output end of the second guide cylinder 352, and a guide mechanism 353 is provided on the moving plate 351;
an open lap component 354 disposed on the mobile plate 351;
that is, the second guiding cylinder 352 is extended or compressed, and the wire-opening lap assembly 354 can be controlled to simulate the wire opening at different positions on the wire harness, as shown in fig. 6, the wire harness is divided into three areas I, II, III, the tensile stress of the I area and the III area is approximately the same, the wrapping stress of the II area is concentrated, and the wire-opening lap assembly 354 can be randomly opened in the I, II and III areas.
Referring to fig. 5, in this embodiment, the wire bonding assembly 354 includes:
the output end of the third driving mechanism is hinged with a preset seat which can slide relatively;
the wire cutter 3543 is fixedly arranged in the preset seat, wedge-shaped media 3544 are movably arranged in the preset seat, and the wedge-shaped media 3544 are connected with the inner wall of the preset seat through a connecting spring 3545;
it should be noted that, the first guide plate 3541 and the second guide plate 3542 play a role in guiding the wire harness, after the third driving mechanism is started, the wire opener 3543 can open the wire harness, and the wire harness limiting mechanism 34 can stretch the wire harness after moving in opposite directions, so that the foreskin of the wire harness is broken.
As a preferred embodiment, the length of the wire saw 3543 is less than the length of the wedge media 3544;
it should be explained that the thickness of the cutting depth of the wire-opening knife 3543 should be controlled according to the thickness of the wrapping of the wire harness, during the cutting process, the wedge-shaped medium 3544 is always abutted against the inner wrapping wire of the wire harness under the action of the connecting spring 3545, so that the wedge-shaped medium 3544 is abutted against the position of the wire opening when the wire harness or the wire harness and the connector are stretched, and the wire-opening knife 3543 is controlled to deflect the thickness of the cutting depth, and the signal is communicated, so that the FPGA reads the transmission result; or the second guide cylinder 352 stretches, the third driving mechanism deflects, the cutting depth of the wire opening knife 3543 is controlled according to the wrapping thickness of the wire harness, after the wire opening is finished, the wire opening knife 3543 is away from the wire harness, a signal is connected, and the FPGA reads the transmission result, namely, the conductivity of whether the wire harness is overlapped with a medium or not can be detected.
As a preferred embodiment, the wedge-shaped media 3544 in the multiple groups of analog detecting devices 3 are all different in material, the wedge-shaped media 3544 may be plastic, wood, aluminum, etc., and different media in the analog electronic device overlap with the fracture.
A test method of a wire harness test device based on an FPGA, comprising the steps of:
s1, firstly, adjusting and fixing the longitudinal distance of a joint limiting mechanism 32 according to the length of a wire harness, embedding the joint of the wire harness into the joint limiting mechanism 32, and placing the wire harness into a guide wheel 341, a limiting wheel 342 and a guide mechanism 353;
s2, the conveying device 2 supplies fixed wire harnesses to the positioning of each analog detection device 3 in a batched mode;
s3, starting a first driving mechanism, and sealing the wire harness to be detected by a sealing plate 31, wherein the joint of the synchronous wire harness is spliced with the interface;
s4, performing primary test under normal conditions, wherein the DDS controls the voltage signal source module and the current signal source module to generate corresponding detection signals, a wire harness is used as a carrier to convey the detection signals to the voltage sampling module and the current sampling module, the FPGA reads and calculates the transmission results, and finally, the test results in each simulation detection device 3 are obtained;
s5, starting an environment simulation module, simulating the same environment conditions and different environment conditions by a plurality of groups of simulation detection devices 3, controlling the DDS to generate signals, reading and transmitting results by the FPGA to operate, and finally obtaining test results in each simulation detection device 3 for comparison;
s6, under the condition of simulating the stretching of the wire harness, the wire harness stretching method can be divided into the following steps:
a. only the simulation stretching of the whole wire harness is carried out, the two groups of wire harness limiting mechanisms 32 or the two groups of wire harness limiting mechanisms 34 move in opposite directions, the whole wire harness is stretched, signals are connected, the FPGA reads and transmits the results, the calculation is carried out, and finally the test results in each simulation detection device 3 are obtained for comparison;
b. the simulated stretching of the wire harness and the joint, the joint limiting mechanism 32 and the wire harness limiting mechanism 34 which are arranged on the same upper part or the same lower part move in opposite directions, the upper joint and the wire harness or the lower joint and the wire harness are synchronously or respectively stretched, and are connected in parallel, the FPGA reads and transmits the result to operate, and finally, the test result in each simulated detection device 3 is obtained to be compared;
c. the simulated stretching of different wire opening positions among the wire harnesses, the extension of the second guide cylinder body 352, the deflection of the third driving mechanism, the control of the cutting depth thickness of the wire opener 3543 according to the wrapping thickness of the wire harnesses, the wire opener 3543 far away from the wire harnesses after the wire opening is completed, the wire opening of different positions on the wire harnesses is simulated by a plurality of groups of simulated detection devices 3, and the steps a and b are repeated;
d. the simulated stretching of different wire opening positions among the wire harnesses and medium connection is carried out, the step c is repeated firstly, after the wire opening is completed, the stretching of the wire harnesses or the wire harnesses and the joints in the step a and the step b is repeated, then the thickness of deflection cutting depth of the wire opening knife 3543 is controlled, the wedge-shaped medium 3544 is abutted against the wire opening positions, signals are communicated, the FPGA reads and transmits results to operate, and finally test results in each simulated detection device 3 are obtained to be compared;
the steps described above may be continued with additional S5 or otherwise independently tested and S1-S4 operations repeated.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. An FPGA-based harness testing apparatus, characterized in that it comprises:
a conveying device (2) is fixedly arranged at the upper end of the workbench (1);
the simulation detection devices (3) are arranged on the workbench (1) at equal intervals, the wire harness is fixed by the conveying device (2) and then conveyed into the simulation detection devices (3), and the simulation detection devices (3) are arranged as sliding sealing mechanisms with two sides driven by corresponding first driving mechanisms; and a recovery device (4) provided in the table (1) for recovering the wire harnesses subjected to the batch correspondence detection;
the analog detection device (3) comprises:
the sealing plate (31) is respectively embedded at the output end of the first driving mechanism, joint limiting mechanisms (32) are slidably arranged at the upper end and the lower end in the sealing plate (31), and three groups of guide rails (33) are correspondingly and fixedly arranged in the sealing plate (31);
a harness limiting mechanism (34) which is vertically slidably limited to the guide rail (33);
the wire opening mechanism (35) is arranged in the sealing plate (31), the wire opening mechanism (35) can be vertically and slidably arranged on a guide column, and the guide column is fixedly arranged on the sealing plate (31);
interfaces which are electrically connected with the host and the slave are correspondingly arranged in the sealing plate (31), the interfaces connected with the host are based on signals generated by the DDS, the output end of the DDS signals is communicated with a voltage signal source module and a current signal source module, the interfaces connected with the slave are communicated with a voltage sampling module and a current sampling module, and the voltage sampling module and the current sampling module are connected with the FPGA;
the wire harness limiting mechanisms (34) are two groups which are vertically symmetrically arranged, the two groups are identical in structure, the wire harness limiting mechanisms comprise a first guide cylinder body (343) and a guide plate which are vertically and slidably arranged on the guide rail (33), a substrate is fixed at the output end of the first guide cylinder body (343), the substrate is horizontally and slidably arranged on the guide plate, a guide wheel (341) and a limiting wheel (342) are rotatably arranged on the substrate, and a second driving mechanism is arranged on the other side of the baffle plate (31) and can drive the guide plate to move vertically;
the wire opening mechanism (35) includes:
the second guide cylinder body (352) is fixedly arranged on the sealing plate (31), a movable flat plate (351) is fixed at the output end of the second guide cylinder body (352), and a guide mechanism (353) is arranged on the movable flat plate (351);
an open-line lap assembly (354) provided on the mobile plate (351);
the open lap assembly (354) includes:
the output end of the third driving mechanism is hinged with a preset seat which can slide relatively;
the wire cutter (3543) is fixedly arranged in the preset seat, wedge-shaped media (3544) are movably arranged in the preset seat, and the wedge-shaped media (3544) are connected with the inner wall of the preset seat through connecting springs (3545).
2. The wire harness testing device based on the FPGA according to claim 1, wherein a heating component, a humidifying component and a wind power component controlled by an environment simulation module are arranged in the sealing plate (31).
3. The FPGA-based harness testing apparatus of claim 1, wherein the wire knife (3543) has a length that is less than a length of the wedge medium (3544).
4. The wire harness testing device based on the FPGA according to claim 1, wherein the wedge-shaped media (3544) in the plurality of groups of analog detection devices (3) are all made of different materials.
5. An FPGA-based harness testing method employing the FPGA-based harness testing apparatus according to claim 2, comprising the steps of:
s1, firstly, adjusting and fixing the longitudinal distance of a joint limiting mechanism (32) according to the length of a wire harness, embedding the joint of the wire harness into the joint limiting mechanism (32), and placing the wire harness into a guide wheel (341), a limiting wheel (342) and a guide mechanism (353);
s2, the conveying device (2) supplies fixed wire harnesses to the positioning and supplying positions of the analog detection devices (3) in batches;
s3, starting a first driving mechanism, sealing the wire harness to be detected by a sealing plate (31), and plugging the joint of the synchronous wire harness with the interface;
s4, performing primary test under normal conditions, wherein the DDS controls the voltage signal source module and the current signal source module to generate corresponding detection signals, a wire harness is used as a carrier to convey the detection signals to the voltage sampling module and the current sampling module, the FPGA reads and computes the transmission results, and finally, the test results in each simulation detection device (3) are obtained;
s5, starting an environment simulation module, simulating the same environment conditions and different environment conditions by a plurality of groups of simulation detection devices (3), controlling the DDS to generate signals, reading and transmitting results by the FPGA to operate, and finally obtaining test results in each simulation detection device (3) for comparison;
s6, under the condition of simulating the stretching of the wire harness, the wire harness stretching method can be divided into the following steps:
a. only analog stretching is carried out on the whole wire harness, two groups of wire harness limiting mechanisms (32) or two groups of wire harness limiting mechanisms (34) move in opposite directions, the whole wire harness is stretched, signals are connected, an FPGA reads and transmits results, calculation is carried out, and finally test results in each analog detection device (3) are obtained and compared;
b. the simulated stretching of the wire harness and the joint, the joint limiting mechanism (32) and the wire harness limiting mechanism (34) which are arranged on the same upper part or the same lower part move in opposite directions, the upper joint and the wire harness or the lower joint and the wire harness are synchronously or respectively stretched, the wire harness and the lower joint are connected in parallel, the FPGA reads and transmits the result to operate, and finally, the test result in each simulated detection device (3) is obtained to be compared;
c. the simulated stretching of different wire opening positions among the wire harnesses is carried out, a second guide cylinder body (352) is stretched, a third driving mechanism deflects, the cutting depth thickness of a wire opening knife (3543) is controlled according to the wrapping thickness of the wire harnesses, after the wire opening is finished, the wire opening knife (3543) is far away from the wire harnesses, the wire opening is carried out at different positions on the wire harnesses in a simulated manner by a plurality of groups of simulated detection devices (3), and the steps a and b are repeated;
d. and c, repeating the step a and b to stretch the wire harness or the wire harness and the connector after the wire harness is opened, controlling the thickness of the wire harness cutter (3543) for deflecting the cutting depth, enabling the wedge-shaped medium (3544) to abut against the wire harness opening position, switching on a signal, reading and transmitting a result by the FPGA to operate, and finally obtaining test results in each simulation detection device (3) to compare.
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