CN204256104U - A kind of flat cable fault testing apparatus - Google Patents
A kind of flat cable fault testing apparatus Download PDFInfo
- Publication number
- CN204256104U CN204256104U CN201420617020.9U CN201420617020U CN204256104U CN 204256104 U CN204256104 U CN 204256104U CN 201420617020 U CN201420617020 U CN 201420617020U CN 204256104 U CN204256104 U CN 204256104U
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- display circuit
- analog switch
- fault
- input
- decoding scheme
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Abstract
The utility model discloses a kind of flat cable fault testing apparatus, comprise controller and power module, also comprise input/output expander; Described input/output expander comprises the analog switch that decoding scheme is connected with multiple and described decoding scheme; Described controller is connected with fault display circuit, decoding scheme, analog switch; Described power module is described controller, fault display circuit, decoding scheme, analog switch are powered; Described multiple analog switch is connected with input/output interface circuit.The utility model realizes the expansion of input/output test interface by code translator and cooperatively interacting of analog switch, can adjust the quantity of analog switch according to actual needs, meets more split conductor crimping testing requirement.
Description
Technical field
The utility model relates to a kind of flat cable fault testing apparatus.
Background technology
The short trouble of flat cable generally occurs between two adjacent lines, the therefore following (see figure 1) of the method for detection failure:
At i-th line input signal, at the other end acknowledge(ment) signal of i-th line.If can signal be received, illustrate that open circuit fault does not occur this root line, otherwise be judged as open circuit fault.Then acknowledge(ment) signal measurement is carried out respectively at the i-th+1 line and i-1 root line, if can not signal be received, then illustrate that circuit is normal, otherwise can short trouble be judged to be, because what take is that sequentially formula is measured, as long as therefore measure at i+1 root line the measurement that short trouble can realize between adjacent two lines.
Existing flat cable proving installation adopts 5 groups of 74LS138 code translators as input expanding interface, expand as output interface with 5 groups of 74LS373 latchs, single-chip microcomputer can be interfaced to 40 tunnels by this structure extension, adopting light emitting diode to carry out fault heart yearn location and fault category instruction, mainly there are following two drawbacks in it:
1, the expansion of monolithic controller only has 40 cores, is difficult to the crimping testing requirement meeting more multicore cable;
2, adopt light emitting diode as fault heart yearn locating and displaying, when measuring heart yearn quantity and being larger, display is directly perceived not, and the quantity of light emitting diode is more, and there are the words damaged can have an impact to measurement result, and the reliability of device reduces.
Summary of the invention
Technical problem to be solved in the utility model is, not enough for prior art, provides a kind of flat cable fault testing apparatus, solves existing proving installation expansion interface limited, cannot meet the problem of more split conductor crimping testing requirement.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of flat cable fault testing apparatus, comprises controller and power module, also comprise input/output expander; Described input/output expander comprises the analog switch that decoding scheme is connected with multiple and described decoding scheme; Described controller is connected with fault display circuit, decoding scheme, analog switch; Described power module is described controller, fault display circuit, decoding scheme, analog switch are powered; Described multiple analog switch is connected with input/output interface circuit.
Described fault display circuit comprises charactron localization of fault display circuit and diode breakdown classification display circuit, and described digital pipe display circuit comprises two charactrons, and described two charactrons are respectively connected with a digital pipe driving chip; Described diode display circuit comprises two light emitting diodes, and described two light emitting diodes are respectively connected with a current-limiting resistance; Described two charactrons, two digital pipe driving chips, two light emitting diodes are all connected with described power module; Described two digital pipe driving chips, two current-limiting resistances are all connected with described controller.The diode display of this fault display circuit divide may be used for distinguish fault category, carry out failure modes instruction; Numeral method part can show fault core number, thus carries out localization of fault.
Described power module circuitry comprises double-point double-throw switch, and the power supply adaptor power interface that described double-point double-throw switch input end and 9V battery feed circuit, AC220V turn DC5V is connected; Described double-point double-throw switch output end power status display circuit connects.The power supply adaptor power interface that this power module circuitry utilizes DC9V battery and AC220V to turn DC5V supplies power with double circuit, and makes to test the power supply restriction at not tested person scene.
Compared with prior art, the beneficial effect that the utility model has is: the utility model realizes the expansion of input/output test interface by code translator and cooperatively interacting of analog switch, the quantity of analog switch can be adjusted according to actual needs, meet more split conductor crimping testing requirement, this apparatus design dibit charactron localization of fault display simultaneously and the display of diode breakdown state, can display measurement result intuitively, this device also adopts the design of supplying power with double circuit of external power supply and internal battery powers, make to test the power supply restriction at not tested person scene, and the small volume of whole device, portability improves.
Accompanying drawing explanation
Fig. 1 is flat cable test philosophy figure;
Fig. 2 is the utility model one embodiment fault display circuit schematic diagram;
Fig. 3 is the utility model one embodiment controller minimum system schematic diagram;
Fig. 4 is the utility model one embodiment power module schematic diagram;
Fig. 5 is the utility model one embodiment input/output expander schematic diagram;
Fig. 6 is the utility model one embodiment input/output interface circuit schematic diagram.
Embodiment
As shown in Figure 2, the utility model one embodiment fault display circuit is divided into two parts, and a part is numeral method, connected to form by charactron and charactron driving chip MC14495, be connected with the P1 mouth of controller, Main Function is display fault core number, carries out localization of fault.Another part is diode display, and comprise light emitting diode D1, D2 and current-limiting resistance R5, R6, Main Function, for distinguishing fault category, carries out failure modes instruction.
Fig. 3 is controller minimum system, comprise master controller AT89S52, reset circuit, crystal oscillating circuit, external interrupt circuit, major function is that the master controller of device is responsible for the cooperation control of each circuit and the realization of breakdown judge algorithm, also carries out online programming for realizing to controller.
Fig. 4 is the power supply circuit (power module) of device, comprise double-point double-throw switch S3, voltage stabilizer LM78L05, power supply status display circuit (light emitting diode D3) composition, DC9V battery interface, AC220V turns the power adaptor interface of DC5V, Main Function powers for whole device to provide the power supply of DC5V, realizes two-way road and power.
Fig. 5 is the input/output expander of device, is made up of 74LS139 decoding scheme and 16 path analoging switch CD4067, and for realizing the expansion of 64 tunnel analog channels, and controller coordinate can realize the break-make control inputting, export 64 path analoging switch.
Fig. 6 is the input/output interface circuit of device, is made up of one group of 40 flat cable plug and 20 core flat cable plugs, and Main Function is that implement device docks with the input and output of 20 core flat cables and 40 core flat cables.
The use procedure of the utility model device is as follows: flat cable is installed on device IO interface on, if viewing area is shown as " 99 ", and fault category lamp position (i.e. light emitting diode D1 and D2) does not glimmer, test wire harness non-fault is described, glimmer if there is fault category pilot lamp, the numeral of charactron shows the position of fault wire core, to improve the efficiency of flat cable test jobs.
Claims (3)
1. a flat cable fault testing apparatus, comprises controller and power module, it is characterized in that, also comprise input/output expander; Described input/output expander comprises the analog switch that decoding scheme is connected with multiple and described decoding scheme; Described controller is connected with fault display circuit, decoding scheme, analog switch; Described power module is described controller, fault display circuit, decoding scheme, analog switch are powered; Described multiple analog switch is connected with input/output interface circuit.
2. flat cable fault testing apparatus according to claim 1, it is characterized in that, described fault display circuit comprises charactron localization of fault display circuit and diode breakdown classification display circuit, described charactron localization of fault display circuit comprises two charactrons, and described two charactrons are respectively connected with a digital pipe driving chip; Described diode breakdown classification display circuit comprises two light emitting diodes, and described two light emitting diodes are respectively connected with a current-limiting resistance; Described two charactrons, two digital pipe driving chips, two light emitting diodes are all connected with described power module; Described two digital pipe driving chips, two current-limiting resistances are all connected with described controller.
3. flat cable fault testing apparatus according to claim 1 and 2, it is characterized in that, described power module comprises double-point double-throw switch, and the power supply adaptor power interface that described double-point double-throw switch input end and DC9V battery feed circuit, AC220V turn DC5V is connected; Described double-point double-throw switch output terminal is connected with power supply status display circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420617020.9U CN204256104U (en) | 2014-10-23 | 2014-10-23 | A kind of flat cable fault testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420617020.9U CN204256104U (en) | 2014-10-23 | 2014-10-23 | A kind of flat cable fault testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204256104U true CN204256104U (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420617020.9U Expired - Fee Related CN204256104U (en) | 2014-10-23 | 2014-10-23 | A kind of flat cable fault testing apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN204256104U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110910529A (en) * | 2019-11-07 | 2020-03-24 | 腾讯科技（深圳）有限公司 | Object state detection method and device and storage medium |
| RU201369U1 (en) * | 2020-01-20 | 2020-12-11 | Общество с ограниченной ответственностью "НЕОКОМ" | MODULE DEVICE FOR TESTING HARNESSES AND CABLE ASSEMBLIES |
-
2014
- 2014-10-23 CN CN201420617020.9U patent/CN204256104U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110910529A (en) * | 2019-11-07 | 2020-03-24 | 腾讯科技（深圳）有限公司 | Object state detection method and device and storage medium |
| CN110910529B (en) * | 2019-11-07 | 2022-04-29 | 腾讯科技（深圳）有限公司 | Object state detection method and device and storage medium |
| RU201369U1 (en) * | 2020-01-20 | 2020-12-11 | Общество с ограниченной ответственностью "НЕОКОМ" | MODULE DEVICE FOR TESTING HARNESSES AND CABLE ASSEMBLIES |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20201023 |