CN207036994U - A kind of coupled capacitor measurement apparatus of EDP/VBYONE signals - Google Patents
A kind of coupled capacitor measurement apparatus of EDP/VBYONE signals Download PDFInfo
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- CN207036994U CN207036994U CN201720723746.4U CN201720723746U CN207036994U CN 207036994 U CN207036994 U CN 207036994U CN 201720723746 U CN201720723746 U CN 201720723746U CN 207036994 U CN207036994 U CN 207036994U
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Abstract
Electronic measuring technology field is the utility model is related to, specifically discloses a kind of coupled capacitor measurement apparatus of EDP/VBYONE signals, including：Constant current generation module, channel control module, parameter detection module, parameter memory module and Upper machine communication module, the coupled capacitor measurement apparatus of the EDP/VBYONE signals, it is connected between EDP/VBYONE signal-testing apparatus and LCD screen end, coupled capacitor in transmitting LCD screen end EDP/VBYONE signals is realized to be measured in real time, ancillary staff positioned where the problem of coupled capacitor exception in time, further quickly to judge the failure in the transmission of EDP/VBYONE signals and take appropriate measures, production efficiency is improved.
Description
Technical field
It the utility model is related to electronic measuring technology field, and in particular to the coupled capacitor measurement of AC coupled signals, especially
It is related to a kind of coupled capacitor measurement apparatus of EDP/VBYONE signals.
Background technology
In the prior art, LCD screen test equipment sends AC coupled EDP/VBYONE signals and transmitted to LCD screen, carries out LCD
Screen characteristics and quality test, the transmitting terminal and receiving terminal of the usual AC coupled EDP/VBYONE signals have μ F level
Coupled capacitor.In actual test operation, often because the anomalies such as the capacitance short-circuit, open circuit, capacitance mistake influence point screen
Effect, there is situations such as picture is different, screen does not work, influence communication and display effect, cause testing efficiency low, even meeting when serious
LCD screen is burnt, causes unnecessary loss, delays manufacturing schedule, and entirely tests link and is related to instrument, transmitting terminal, protection
Very more device such as device, receiving terminal, it is difficult to navigate to where specific problem points, failure can not be judged and taken accordingly to arrange
Apply.
Utility model content
In view of the above-mentioned problems of the prior art, the utility model provides a kind of coupling electricity of EDP/VBYONE signals
Hold measurement apparatus, the coupled capacitor in the EDP/VBYONE signals transmission of LCD screen end can be measured in real time, it is quick to judge that coupled capacitor is different
Where often the problem of.
Technical scheme is used by the utility model solves technical problem：A kind of coupled capacitor of EDP/VBYONE signals
Measurement apparatus, including：Constant current generation module, channel control module, parameter detection module, parameter memory module and upper machine communication
Module；The constant current generation module is used for the constant-current source for producing a μ A rank, coupled capacitor to be measured is charged；The passage control
Molding block is used to switch multi-channel test signal；Various control programs are run in the parameter detection module, for detecting, exporting
The various parameters of the EDP/VBYONE signals；The parameter memory module is used for each detection for storing the parameter detection module
Parameter；The Upper machine communication module is used for the interconnection for realizing the parameter detection module and host computer.
As the improvement to above-mentioned technical proposal, the constant current generation module is constant current generation circuit.
As the improvement to above-mentioned technical proposal, the channel control module is more than channel control circuit, including 2
CD4052。
As the improvement to above-mentioned technical proposal, the parameter detection module includes MCU.
As the improvement to above-mentioned technical proposal, the parameter memory module includes EEPROM.
As the improvement to above-mentioned technical proposal, the Upper machine communication module includes RS485 communication modules.
Compared with prior art, the coupled capacitor measurement apparatus of EDP/VBYONE signals provided by the utility model, connection
Between EDP/VBYONE signal-testing apparatus and LCD screen end, realize and coupled in being transmitted to LCD screen end EDP/VBYONE signals
Where the problem of electric capacity is measured in real time, and ancillary staff positions the coupled capacitor exception in time, with further quick
Judge the failure in the transmission of EDP/VBYONE signals and take appropriate measures, improve production efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the coupled capacitor measurement apparatus of EDP/VBYONE signals in the utility model one embodiment
Figure；
Fig. 2 is the measuring principle of the coupled capacitor measurement apparatus of EDP/VBYONE signals in the utility model one embodiment
Line map.
Following embodiment will further illustrate the utility model with reference to above-mentioned accompanying drawing.
Embodiment
The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.
Fig. 1 is referred to, the utility model provides a kind of coupled capacitor measurement apparatus of EDP/VBYONE signals, including：It is permanent
Flow generation module 10, channel control module 20, parameter detection module 30, parameter memory module 40 and Upper machine communication module 50.
The coupled capacitor measurement apparatus of the EDP/VBYONE signals, be connected to EDP/VBYONE signal-testing apparatus and LCD screen end it
Between, the coupled capacitor for LCD screen end in being transmitted to EDP/VBYONE signals is measured in real time, so that accurately positioning is real in time
Coupled capacitor abnormal particular problem point in LCD screen end in the test operation of border, so as to which ancillary staff judges the EDP/
Guilty culprit in the transmission of VBYONE signals.
Fig. 2 is referred to, the constant current generation module 10 is used for the constant-current source I for producing a μ A rankX, make coupling electricity to be measured
Hold CXCharging；The channel control module 20 is used to switch multi-channel test signal；Run in the parameter detection module 30 each
Kind control program, for detecting the various parameters of the EDP/VBYONE signals and whole detection process being controlled and made
Feedback；The parameter memory module 40 is used for each detection parameters for storing the parameter detection module 30；The upper machine communication
Module 50 is used to realize the parameter detection module 30 and the interconnection of host computer.
In the present embodiment, the constant current generation module 10 is constant current generation circuit, and it produces faint constant-current source IX, it is described
Constant-current source IXTo the coupled capacitor C to be measuredXCarry out current stabilization charging, then, the coupled capacitor C to be measuredXThe voltage Ux=at both ends
IX*ΔT/CX, wherein, Δ T represents the constant-current source IXPass through the coupled capacitor C to be measuredXTime.
In the present embodiment, the channel control module 20 is channel control circuit, and it includes 2 channel number word controls of difference 4
Analog switch CD4052 processed, can be by selecting the different channel control circuits can according to the difference of LCD screen in actual test
Realize the switching between different EDP/VBYONE test signals；Meanwhile can be by opening the digital control analog switch
CD4052, by the coupled capacitor CXBoth ends access in the parameter detection module 30 with the EDP/VBYONE test signals pair
The two ADC mouths answered carry out AD samplings, obtain the coupled capacitor CXThe voltage U at both ends1And U2。
In the present embodiment, in the parameter detection module 30, corresponding control program is run, described two AD are sampled
Value U1、U2Subtract each other, obtain the coupled capacitor C to be measuredXThe virtual voltage Ux at both ends, the coupling is judged according to the voltage Ux
Electric capacity CXState and calculate the coupled capacitor CXActual value, and by the coupled capacitor CXActual value and the ginseng
The coupled capacitor C stored in number memory module 40XStandard value is contrasted, to judge whether it is in normal range (NR).Specifically,
As Ux=0, the coupled capacitor CXFor short-circuit condition；As Ux=Umax (the constant-current source IXMaximum output voltage) when, institute
State coupled capacitor CXFor open-circuit condition；In the other cases, the coupled capacitor CXActual value can pass through formula Cx=IX*
Δ T/Ux is calculated.Wherein, the constant-current source IX, its time Δ T passed through detects by the parameter detection module 30
Go out.
A kind of EDP/VBYONE signals are only have selected above to be illustrated, it is possible to understand that, of the present utility model
In other embodiment, for different EDP/VBYONE signals, the coupled capacitor CXCondition adjudgement and capacitance calculate not
It is limited to the above method.
In one embodiment, the parameter detection module 30 includes MCU, and the MCU uses STM32F103ZET6,
There are 12 ADC mouths of multichannel, the testing requirement of a variety of different EDP/VBYONE test signals can be met.
It should be understood that for different LCD screens, its EDP/VBYONE test signal is different, accordingly, each detection
Parameter is also not quite similar.By taking coupled capacitor Cx as an example, due to different EDP/VBYONE test signals coupled capacitor Cx standards not
Together, so in actual production, the magnitude of voltage for typically reading multiple LCD in advance is averaged, and estimates coupled capacitor Cx error models
Enclose, as standard, be stored in the parameter memory module 40, to facilitate follow-up throw as directly invoked after producing.The present embodiment
In, the parameter memory module 40 includes EEPROM, and the EEPROM can be wiped on computers or on special equipment and believed
Breath, is reprogramed, and data storage therein will not lose after power down.
In the present embodiment, the Upper machine communication module 50 includes RS485 communication modules, can be mutual by RS485 interfaces
Join the parameter detection module 30 and host computer, respectively detect when the upload, download and actual production of realizing different detection parameters
The calling of parameter, selection.In one embodiment, the RS485 circuits use MAX485ESA, are interconnected with PC versions host computer,
Detection parameters, selection and the scope for specifying coupled capacitor Cx to be measured can be downloaded.
In addition, those skilled in the art can also do other changes in the utility model spirit.Therefore these are according to this practicality
The change that new spirit is done, all should be within the scope of the utility model be claimed.
Claims (6)
- A kind of 1. coupled capacitor measurement apparatus of EDP/VBYONE signals, it is characterised in that including：Constant current generation module, passage Control module, parameter detection module, parameter memory module and Upper machine communication module；The constant current generation module is used to produce one The constant-current source of individual μ A ranks, coupled capacitor to be measured is set to charge；The channel control module is used to switch multi-channel test signal；Institute State and various control programs are run in parameter detection module, for detecting, exporting the various parameters of the EDP/VBYONE signals；Institute State each detection parameters that parameter memory module is used to store the parameter detection module；The Upper machine communication module is used to realize The interconnection of the parameter detection module and host computer.
- 2. the coupled capacitor measurement apparatus of EDP/VBYONE signals as claimed in claim 1, it is characterised in that the constant current production Raw module is constant current generation circuit.
- 3. the coupled capacitor measurement apparatus of EDP/VBYONE signals as claimed in claim 1, it is characterised in that the passage control Molding block is more than channel control circuit, including 2 CD4052.
- 4. the coupled capacitor measurement apparatus of EDP/VBYONE signals as claimed in claim 1, it is characterised in that the parameter inspection Surveying module includes MCU.
- 5. the coupled capacitor measurement apparatus of EDP/VBYONE signals as claimed in claim 1, it is characterised in that the parameter is deposited Storage module includes EEPROM.
- 6. the coupled capacitor measurement apparatus of EDP/VBYONE signals as claimed in claim 1, it is characterised in that the host computer Communication module includes RS485 communication modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723746.4U CN207036994U (en) | 2017-06-21 | 2017-06-21 | A kind of coupled capacitor measurement apparatus of EDP/VBYONE signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723746.4U CN207036994U (en) | 2017-06-21 | 2017-06-21 | A kind of coupled capacitor measurement apparatus of EDP/VBYONE signals |
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| CN207036994U true CN207036994U (en) | 2018-02-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485640A (en) * | 2020-11-18 | 2021-03-12 | 苏州华兴源创科技股份有限公司 | Detection method and device for built-in capacitor, detection equipment and storage medium |
-
2017
- 2017-06-21 CN CN201720723746.4U patent/CN207036994U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485640A (en) * | 2020-11-18 | 2021-03-12 | 苏州华兴源创科技股份有限公司 | Detection method and device for built-in capacitor, detection equipment and storage medium |
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Address after: 215000 No. 18 Weiwen Road, Suzhou Industrial Park, Jiangsu Province Patentee after: Hai Electronic Technology (Suzhou) Co., Ltd. Address before: 215000 No. 18 Weiwen Road, Suzhou Industrial Park, Jiangsu Province Patentee before: SUZHOU INDUSTRIAL PARK HIDEA MECHATRONICS TECHNOLOGY CO., LTD. |