CN202710666U - Distributed capacitance detection device - Google Patents
Distributed capacitance detection device Download PDFInfo
- Publication number
- CN202710666U CN202710666U CN 201220000907 CN201220000907U CN202710666U CN 202710666 U CN202710666 U CN 202710666U CN 201220000907 CN201220000907 CN 201220000907 CN 201220000907 U CN201220000907 U CN 201220000907U CN 202710666 U CN202710666 U CN 202710666U
- Authority
- CN
- China
- Prior art keywords
- distributed capacitance
- detection chip
- detection device
- display module
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a distributed capacitance detection device. The distributed capacitance detection device comprises a detection probe, a detection chip, a serial port switching module and a display module, wherein the detection probe is connected with the detection chip, the detection chip is connected with the serial port switching module, and the serial port switching module is connected with the display module. According to the distributed capacitance detection device of the utility model, the detection probe is adopted as one pole of a capacitor, power ground on a circuit board where the detection chip is arranged is adopted as the other pole of the capacitor; the distributed capacitances existing in points which need to be detected on various objects can be detected conveniently and accurately through the detection chip, and the magnitudes of distributed capacitances can be displayed through the display module, and therefore, it is can be determined whether measures should be taken or not to decrease the distributed capacitance of a point so that interference on a sensor or a circuit at this point caused by over-large distributed capacitance can be avoided.
Description
Technical field
The utility model relates to a kind of distributed capacitance detection device.
Background technology
Distributed capacitance is by the morphogenetic a kind of distribution parameter of noncapacitive, is widespread in nature.Distributed capacitance can have certain impact 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 distributed capacitance is excessive.
The utility model content
Technical problem to be solved in the utility model is: a kind of distributed capacitance detection device that can accurately detect the distributed capacitance size is provided.
The technical scheme in the invention for solving the above technical problem is: 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, described display module adopts computer screen.
As preferably, the model of described detection chip is CY8C21234.
Compared with prior art, the utility model has the advantage of: a utmost point take detector probe as electric capacity, power supply ground on the circuit board at detection chip place is another utmost point of electric capacity, can measure easily and accurately the size of the distributed capacitance that required measurement point exists on the various objects and show by display module by 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.
As improvement, described pick-up unit also comprises main control MCU, stepper motor and LED light; Described main control MCU and LED light all are connected with detection chip; 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 with detection chip the size variation of the various dependence monitoring of realization distributed capacitance to finish.
As preferably, the model of described main control MCU is P89C668.
Description of drawings
Fig. 1 is the block diagram of the utility model distributed capacitance detection device.
Embodiment
As shown in the figure, the utility model distributed capacitance detection device, 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; The serial ports interconnecting module is known custom circuit in the industry, does not repeat them here; Display module adopts computer screen, the serial ports interconnecting module is connected with display module namely and is connected with the com interface of computing machine, utilize powerful software support in the computing machine, detected distributed capacitance value information is better shown, in 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.
Described pick-up unit also comprises main control MCU, stepper motor and LED light; Described main control MCU and LED light all are connected with detection chip; 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 with detection chip the size variation of the various dependence monitoring of realization distributed capacitance to finish.
The model of described detection chip is CY8C21234.
The model of described main control MCU is P89C668.
In the utility model, a utmost point take detector probe as electric capacity, power supply ground on the circuit board at detection chip place is another utmost point of electric capacity, 16 pseudo-random number sequence generator elder generation gauge tap in the detection chip are charged to electric capacity, provide power supply by detection chip during charging, after finishing charging, 16 pseudo-random number sequence generator control switch disconnect electric capacity makes its discharge with being connected of power supply, after amplifying, the signal amplifier of the voltage signal that forms during discharge on being located at detector probe send into the pulse that comparer in the detection chip and reference voltage compared and formed respective numbers, after the detection chip paired pulses is counted and data process, calculate the value of distributed capacitance, then be sent to display module and show.When realizing the control function, detection chip meeting paired pulses is counted and transmit control signal main control MCU control step motor rotation, the motion of step motor control detector probe to main control MCU when number of pulses is reached the threshold value of setting.
Claims (5)
1. distributed capacitance detection device, 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 detection device according to claim 1, it is characterized in that: described pick-up unit also comprises main control MCU, stepper motor and LED light; Described main control MCU and LED light all are connected with detection chip; Described stepper motor is electrically connected with main control MCU, is fixedly connected with detector probe.
3. distributed capacitance detection device according to claim 1 is characterized in that: described display module employing computer screen.
4. distributed capacitance detection device according to claim 1, it is characterized in that: the model of described detection chip is CY8C21234.
5. distributed capacitance detection device according to claim 2, it is characterized in that: the model of described main control MCU is P89C668.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220000907 CN202710666U (en) | 2012-01-04 | 2012-01-04 | Distributed capacitance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220000907 CN202710666U (en) | 2012-01-04 | 2012-01-04 | Distributed capacitance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710666U true CN202710666U (en) | 2013-01-30 |
Family
ID=47590954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220000907 Expired - Lifetime CN202710666U (en) | 2012-01-04 | 2012-01-04 | Distributed capacitance detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202710666U (en) |
-
2012
- 2012-01-04 CN CN 201220000907 patent/CN202710666U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9830018B2 (en) | Touch control apparatus and noise compensating circuit and method thereof | |
| CN104459400A (en) | Detection circuit and detection method used for self-contained touch screen | |
| CN103698695A (en) | Multifunctional electrical characteristic testing device and testing method for high-voltage circuit breaker | |
| CN104516599A (en) | touch detection device and touch detection method | |
| US10055035B2 (en) | Position detecting device and position indicator thereof | |
| CN103488360A (en) | Baseline capacitance calibration | |
| CN104254783A (en) | An electrostatic discharge event detector | |
| CN104808847A (en) | Anti-interference method and device for detection of touch screen, touch sensor and touch terminal | |
| CN103425368A (en) | Touch system, and method of reducing accumulated charges | |
| CN203929802U (en) | A kind of sensor on-line measuring device | |
| TWI452504B (en) | Testing device for touch panel and capacitance-measure module | |
| JP2014527325A5 (en) | ||
| CN103675680A (en) | Detector and detection method for locomotive motor optical-electricity encoder | |
| CN202710666U (en) | Distributed capacitance detection device | |
| CN102565543A (en) | Distributed capacitance detection device | |
| CN103294289A (en) | Capacitive touch system and method with automatic correction function | |
| CN202372102U (en) | Aligning force and aligning displacement detector for separable angular contact ball bearing | |
| CN112067056A (en) | Contact net detection device, method and device and computer readable storage medium | |
| CN103380572A (en) | Capacitive sensor device and method for operating a capacitive sensor device | |
| CN104297579A (en) | Detection device and method | |
| CN202494375U (en) | Laser speed measurement instrument of elastic body | |
| CN103677432A (en) | Touch panel driving method and touch system | |
| CN103021238A (en) | Digital static tester | |
| CN202351336U (en) | Insulator detector | |
| CN203337730U (en) | Multichannel effective power acquisition instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |