CN102565543A - Distributed capacitance detection device - Google Patents
Distributed capacitance detection device Download PDFInfo
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- CN102565543A CN102565543A CN2012100007035A CN201210000703A CN102565543A CN 102565543 A CN102565543 A CN 102565543A CN 2012100007035 A CN2012100007035 A CN 2012100007035A CN 201210000703 A CN201210000703 A CN 201210000703A CN 102565543 A CN102565543 A CN 102565543A
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Abstract
The invention discloses a distributed capacitance detection device, which includes a detection probe, a detection chip, a serial port switch-over module and a display module, wherein the detection probe is connected with the detection chip; the detection chip is connected with the serial port switch-over module; and the serial port switch-over module is connected with the display module. According to the invention, the detection probe serves as one pole of a capacitor, and the power supply ground of a circuit board where the detection probe locates serves as the other pole of the capacitor, and through adopting the detection chip, the distributed capacitance of points required to be measured on various objects can be conveniently and accurately detected, and displayed through the display module, so that the necessity of taking measures for reducing the distributed capacitance of the point can be judged to avoid interference in a sensor or a circuit where the point exists due to over big distributed capacitance.
Description
Technical field
The present invention relates to a kind of distributed capacitance pick-up unit.
Background technology
Distributed capacitance is by the morphogenetic a kind of distribution parameter of noncapacitive, is widespread in nature.Distributed capacitance can have certain influence to the sensitivity of sensor and the measuring accuracy of circuit, particularly by they more caused external interference, must reduce or eliminate.
Same instrument, apparatus are because the difference of processing, dispatching from the factory; The size of the distributed capacitance that exists on it also can be different; When sensor installation or design circuit; The size of the distributed capacitance that must exist the relevant position detects, to guarantee can not cause interference to sensor or circuit because of distributed capacitance is excessive.
Summary of the invention
Technical matters to be solved by this invention is: a kind of distributed capacitance pick-up unit that can accurately detect the distributed capacitance size is provided.
The present invention addresses the above problem the technical scheme that is adopted: it comprises detector probe, detection chip, serial ports interconnecting module and display module; Described detector probe is connected with detection chip, and detection chip is connected with the serial ports interconnecting module, and the serial ports interconnecting module is connected with display module.
As preferably, said display module adopts computer screen.
As preferably, the model of said detection chip is CY8C21234.
Compared with prior art; The invention has the advantages that: a utmost point that with the detector probe is electric capacity; Power supply ground with on the circuit board at detection chip place is another utmost point of electric capacity; Can measure the size of the distributed capacitance that required measurement point exists on the various objects easily and accurately and show through the detection of detection chip, thereby the size of the distributed capacitance that can judge whether to take means to reduce this point is to avoid causing interference because of excessive sensor or the circuit to this place of distributed capacitance through display module.
As improvement, said pick-up unit also comprises main control MCU, stepper motor and LED light; Described main control MCU all is connected with detection chip with LED light; Described stepper motor is electrically connected with main control MCU, is fixedly connected with detector probe; The control function that main control MCU, stepper motor and the LED light that increases can cooperate the size variation of the various dependence monitoring of realization distributed capacitance to accomplish with detection chip.
As preferably, the model of described main control MCU is P89C668.
Description of drawings
Fig. 1 is the block diagram of distributed capacitance pick-up unit of the present invention.
Embodiment
As shown in the figure, distributed capacitance pick-up unit of the present invention, it comprises detector probe, detection chip, serial ports interconnecting module and display module; Described detector probe is connected with detection chip, and detection chip is connected with the serial ports interconnecting module, and the serial ports interconnecting module is connected with display module; Serial ports interconnecting module 2 is known custom circuit in the industry, repeats no more at this; Display module 3 adopts computer screen; Serial ports interconnecting module 2 is connected promptly with display module 3 and is connected with the com interface of computing machine, utilizes software support powerful in the computing machine, and detected distributed capacitance value information is better shown; Under the situation that the distributed capacitance value changes; Can also realize that waveform shows, make comparative analysis more clear, detected distributed capacitance value can also be kept in the computing machine.
Said pick-up unit also comprises main control MCU, stepper motor and LED light; Described main control MCU all is connected with detection chip with LED light; Described stepper motor is electrically connected with main control MCU, is fixedly connected with detector probe; The control function that main control MCU, stepper motor and LED light can cooperate the size variation of the various dependence monitoring of realization distributed capacitance to accomplish with detection chip.
The model of said detection chip is CY8C21234.
The model of described main control MCU is P89C668.
Among the present invention; With the detector probe is a utmost point of electric capacity; Power supply ground with on the circuit board at detection chip place is another utmost point of electric capacity, and 16 pseudo-random number sequence generator elder generation CSs in the detection chip charge to electric capacity, by detection chip power supply are provided during charging; After accomplishing charging; 16 pseudo-random number sequence generator control switch break off electric capacity and make its discharge being connected of power supply, send into the pulse that comparer and reference voltage in the detection chip compared and formed respective numbers after the signal amplifier amplification of the voltage signal that forms during discharge on being located at detector probe, the detection chip paired pulses count and data processing after; Calculate the value of distributed capacitance, be sent to display module then and show.When realizing control function, detection chip meeting paired pulses is counted and when number of pulses reaches preset threshold, is transmitted control signal main control MCU control step motor rotation, the motion of step motor control detector probe to main control MCU.
Claims (5)
1. distributed capacitance pick-up unit, it is characterized in that: it comprises detector probe, detection chip, serial ports interconnecting module and display module; Described detector probe is connected with detection chip, and detection chip is connected with the serial ports interconnecting module, and the serial ports interconnecting module is connected with display module.
2. distributed capacitance pick-up unit according to claim 1 is characterized in that: said pick-up unit also comprises main control MCU, stepper motor and LED light; Described main control MCU all is connected with detection chip with LED light; Described stepper motor is electrically connected with main control MCU, is fixedly connected with detector probe.
3. distributed capacitance pick-up unit according to claim 1 is characterized in that: said display module adopts computer screen.
4. distributed capacitance pick-up unit according to claim 1 is characterized in that: the model of said detection chip U1 is CY8C21234.
5. distributed capacitance pick-up unit according to claim 2 is characterized in that: the model of described main control MCU is P89C668.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100007035A CN102565543A (en) | 2012-01-04 | 2012-01-04 | Distributed capacitance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100007035A CN102565543A (en) | 2012-01-04 | 2012-01-04 | Distributed capacitance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102565543A true CN102565543A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100007035A Pending CN102565543A (en) | 2012-01-04 | 2012-01-04 | Distributed capacitance detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880609A (en) * | 2015-06-12 | 2015-09-02 | 上海华岭集成电路技术股份有限公司 | Method for measuring parasitic capacitance of circuit through ATE |
| CN110703337A (en) * | 2019-10-18 | 2020-01-17 | 乐鑫信息科技（上海）股份有限公司 | Capacitive intelligent station detection system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080042641A1 (en) * | 2006-08-21 | 2008-02-21 | American Radionic Company, Inc. | Capacitance measurement device |
| CN201289513Y (en) * | 2008-11-10 | 2009-08-12 | 中国华录·松下电子信息有限公司 | Device for detecting grounding status of deck shielding cover |
| CN101776976A (en) * | 2010-01-28 | 2010-07-14 | 意力(广州)电子科技有限公司 | Linear test machine of capacitance touch screen |
-
2012
- 2012-01-04 CN CN2012100007035A patent/CN102565543A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080042641A1 (en) * | 2006-08-21 | 2008-02-21 | American Radionic Company, Inc. | Capacitance measurement device |
| CN201289513Y (en) * | 2008-11-10 | 2009-08-12 | 中国华录·松下电子信息有限公司 | Device for detecting grounding status of deck shielding cover |
| CN101776976A (en) * | 2010-01-28 | 2010-07-14 | 意力(广州)电子科技有限公司 | Linear test machine of capacitance touch screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880609A (en) * | 2015-06-12 | 2015-09-02 | 上海华岭集成电路技术股份有限公司 | Method for measuring parasitic capacitance of circuit through ATE |
| CN104880609B (en) * | 2015-06-12 | 2018-04-27 | 上海华岭集成电路技术股份有限公司 | Utilize the method for parasitic capacitance on ATE measurement circuits |
| CN110703337A (en) * | 2019-10-18 | 2020-01-17 | 乐鑫信息科技（上海）股份有限公司 | Capacitive intelligent station detection system |
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Application publication date: 20120711 |