CN203811689U - Simple capacitance measuring apparatus - Google Patents
Simple capacitance measuring apparatus Download PDFInfo
- Publication number
- CN203811689U CN203811689U CN201320805691.3U CN201320805691U CN203811689U CN 203811689 U CN203811689 U CN 203811689U CN 201320805691 U CN201320805691 U CN 201320805691U CN 203811689 U CN203811689 U CN 203811689U
- Authority
- CN
- China
- Prior art keywords
- circuit
- electric capacity
- capacitance
- counter
- capacity timing
- 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 - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 210000002683 foot Anatomy 0.000 claims description 8
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 description 13
- 239000013256 coordination polymer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Abstract
The utility model relates to a simple capacitance measuring apparatus and belongs to electronic device measuring apparatus field. The simple capacitance measuring apparatus comprises a zero-capacitance timing circuit, an adjustable multivibrator circuit, a counter circuit, and a decoding display circuit. The zero-capacitance timing circuit is connected with the adjustable multivibrator circuit and the counter circuit. The adjustable multivibrator circuit is connected with the counter circuit. The counter circuit is connected with the decoding display circuit. The simple capacitance measuring apparatus is simple in manipulation, easy in use, high in cost performance compared with a device of the same kind, and capable of measuring the capacitance values of capacitors from 1pF to 10F.
Description
Technical field
The utility model relates to a kind of simple and easy capacitance measuring device, belongs to electron device measurement device field.
Background technology
Digital capacitance device capacitance measurement mechanism is the instrument and equipment that capacitor capacitance is measured.Current, on market, digital capacitance device capacitance measurement mechanism kind is a lot, and capacitor capacitance measurement mechanism circuit that precision is high, measurement range is wide is complicated, price is high, volume is large, is not suitable for those of ordinary skill and uses; Although the capacitor capacitance measurement function measuring accuracy that general multimeter carries, compared with high but have the problem that measurement range is little, reliability is not high enough, price is higher, be applicable to those of ordinary skill and use, and applies limited.
Summary of the invention
The utility model provides a kind of simple and easy capacitance measuring device, for solving the problem that existing measurement mechanism cost is high, measurement range is little.
The technical solution of the utility model is: a kind of simple and easy capacitance measuring device, comprises zero second electric capacity timing circuit 1, variable multivibrator circuit 2, counter circuit 3 and coding display circuit 4; Wherein zero second electric capacity timing circuit 1 is connected with adjustable multi-resonant oscillating circuit 2 sum counter circuit 3 respectively, and adjustable multi-resonant oscillating circuit 2 is connected with counter circuit 3, and counter circuit 3 is connected with coding display circuit 4.
Within described zero second, electric capacity timing circuit 1 consists of rest-set flip-flop control circuit and electric capacity timing circuit; Wherein rest-set flip-flop control circuit is by button AN, resistance R 1, R2, and Sheffer stroke gate G1, G2 and power Vcc form, and it is connected to 2 foots and 4 foots of 555 circuit of electric capacity timing circuit; Electric capacity timing circuit is by resistance R 3, capacitor C 1, testing capacitance C
x, 555 circuit and power Vcc form, and it is connected to variable multivibrator circuit 2.
The oscillation frequency of described variable multivibrator circuit 2
fmeet:
; C wherein
xfor testing capacitance in electric capacity timing circuit,
r 3resistance for R3 in electric capacity timing circuit.
The shift theory of capacitor capacitance measuring principle and measurement range is:
While measuring uF capacitance electric capacity, as long as meet formula
just can draw the oscillation frequency of multi-resonant oscillating circuit, counter shows that numerical value is the capacitance of how many uF; While changing capacitance measurement range, as long as change the oscillation frequency of resistance R 3 and multivibrator circuit, can realize the change of measuring range, very simple.
The beneficial effects of the utility model are: simple to operate, easy to use, to compare cost performance higher with same category of device, can realize the measurement of 1PF-10F capacitor capacitance.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model;
Circuit diagram when Fig. 2 is zero second C meter in the utility model;
Each label in figure: 1 is that zero second electric capacity timing circuit, 2-are that variable multivibrator circuit, 3-are that counter circuit, 4-are coding display circuit.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but content of the present utility model is not limited to described scope.
Embodiment 1: as shown in Figure 1-2, a kind of simple and easy capacitance measuring device, comprises zero second electric capacity timing circuit 1, variable multivibrator circuit 2, counter circuit 3 and coding display circuit 4; Wherein zero second electric capacity timing circuit 1 is connected with adjustable multi-resonant oscillating circuit 2 sum counter circuit 3 respectively, and adjustable multi-resonant oscillating circuit 2 is connected with counter circuit 3, and counter circuit 3 is connected with coding display circuit 4.
Within described zero second, electric capacity timing circuit 1 consists of rest-set flip-flop control circuit and electric capacity timing circuit; Wherein rest-set flip-flop control circuit is by button AN, resistance R 1, R2, and Sheffer stroke gate G1, G2 and power Vcc form, and it is connected to 2 foots and 4 foots of 555 circuit of electric capacity timing circuit; Electric capacity timing circuit is by resistance R 3, capacitor C 1, testing capacitance C
x, 555 circuit and power Vcc form, and it is connected to variable multivibrator circuit 2.
The oscillation frequency of described variable multivibrator circuit 2
fmeet:
; C wherein
xfor testing capacitance in electric capacity timing circuit,
r 3resistance for R3 in electric capacity timing circuit.
Embodiment 2: as shown in Figure 1-2, a kind of simple and easy capacitance measuring device, comprises zero second electric capacity timing circuit 1, variable multivibrator circuit 2, counter circuit 3 and coding display circuit 4; Wherein zero second electric capacity timing circuit 1 is connected with adjustable multi-resonant oscillating circuit 2 sum counter circuit 3 respectively, and adjustable multi-resonant oscillating circuit 2 is connected with counter circuit 3, and counter circuit 3 is connected with coding display circuit 4.
Within described zero second, electric capacity timing circuit 1 consists of rest-set flip-flop control circuit and electric capacity timing circuit; Wherein rest-set flip-flop control circuit is by button AN, resistance R 1, R2, and Sheffer stroke gate G1, G2 and power Vcc form, and it is connected to 2 foots and 4 foots of 555 circuit of electric capacity timing circuit; Electric capacity timing circuit is by resistance R 3, capacitor C 1, testing capacitance C
x, 555 circuit and power Vcc form, and it is connected to variable multivibrator circuit 2.
The oscillation frequency of described variable multivibrator circuit 2
fmeet:
; C wherein
xfor testing capacitance in electric capacity timing circuit,
r 3resistance for R3 in electric capacity timing circuit.
As shown in Figure 2, when button AN presses, Sheffer stroke gate G1 output low level is delivered to reset terminal 4 pin of 555 circuit, make 555 circuit output end 3 pin output low levels, block the square wave CP pulse of adjustable multi-resonant oscillating circuit 2 and deliver to counter circuit 3, be that counter circuit 3 is not counted, 7 pin of 555 circuit are to connecting ground, testing capacitance C simultaneously
xequal ground connection, voltage is zero volt; Sheffer stroke gate G2 output high level is delivered to the reset terminal of counter circuit 3, makes the whole zero clearings of counter.While decontroling button AN, Sheffer stroke gate G1 output high level is delivered to reset terminal 4 pin of 555 circuit, 555 circuit are set to normal operating conditions, make 555 circuit output end 3 pin output high level, allow the square wave CP pulse of adjustable multi-resonant oscillating circuit 2 to deliver to counter circuit 3, be counter circuit 3 countings, 7 pin of 555 circuit disconnect with ground simultaneously, testing capacitance Cx voltage starts charging from zero volt, but while being charged to 2/3Vcc, make 555 circuit output end 3 pin output low levels, block the square wave CP pulse of adjustable multi-resonant oscillating circuit 2 and deliver to counter circuit 3, counter circuit 3 is not counted, can complete one-shot measurement.
Wherein variable multivibrator circuit 2, counter circuit 3 and coding display circuit 4 are all custom circuit of the prior art.
Claims (2)
1. a simple and easy capacitance measuring device, is characterized in that: comprise zero second electric capacity timing circuit (1), variable multivibrator circuit (2), counter circuit (3) and coding display circuit (4); Wherein zero second electric capacity timing circuit (1) is connected with adjustable multi-resonant oscillating circuit (2) sum counter circuit (3) respectively, and adjustable multi-resonant oscillating circuit (2) is connected with counter circuit (3), and counter circuit (3) is connected with coding display circuit (4); Within described zero second, electric capacity timing circuit (1) consists of rest-set flip-flop control circuit and electric capacity timing circuit; Wherein rest-set flip-flop control circuit is by button AN, resistance R 1, R2, and Sheffer stroke gate G1, G2 and power Vcc form, and it is connected to 2 foots and 4 foots of 555 circuit of electric capacity timing circuit; Electric capacity timing circuit is by resistance R 3, capacitor C 1, testing capacitance C
x, 555 circuit and power Vcc form, and it is connected to variable multivibrator circuit (2).
2. simple and easy capacitance measuring device according to claim 1, is characterized in that: the oscillation frequency of described variable multivibrator circuit (2)
fmeet:
; C wherein
xfor testing capacitance in electric capacity timing circuit,
r 3resistance for R3 in electric capacity timing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805691.3U CN203811689U (en) | 2013-12-10 | 2013-12-10 | Simple capacitance measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320805691.3U CN203811689U (en) | 2013-12-10 | 2013-12-10 | Simple capacitance measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811689U true CN203811689U (en) | 2014-09-03 |
Family
ID=51450422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320805691.3U Expired - Fee Related CN203811689U (en) | 2013-12-10 | 2013-12-10 | Simple capacitance measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811689U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407231A (en) * | 2014-11-21 | 2015-03-11 | 广西智通节能环保科技有限公司 | Capacitor measuring device and method |
| CN106501618A (en) * | 2016-12-30 | 2017-03-15 | 上海东软载波微电子有限公司 | Capacitor's capacity measuring circuit |
-
2013
- 2013-12-10 CN CN201320805691.3U patent/CN203811689U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407231A (en) * | 2014-11-21 | 2015-03-11 | 广西智通节能环保科技有限公司 | Capacitor measuring device and method |
| CN106501618A (en) * | 2016-12-30 | 2017-03-15 | 上海东软载波微电子有限公司 | Capacitor's capacity measuring circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203811689U (en) | Simple capacitance measuring apparatus | |
| CN202066910U (en) | Device for measuring resistance, inductance and capacitance | |
| CN204302709U (en) | A kind of hand-held signal generator | |
| CN103412194B (en) | Capacitance measuring and calculating circuit | |
| CN103176022A (en) | Digital multimeter with automatic range conversion function | |
| CN104615030A (en) | Portable function signal generator | |
| CN203894328U (en) | Digital RLC tester | |
| CN103487626A (en) | Measuring circuit | |
| CN201797509U (en) | Circuit realizing summation of voltages | |
| CN202994902U (en) | Low-cost frequency meter circuit | |
| CN207114470U (en) | A kind of grain moisture detects circuit | |
| CN203881852U (en) | Inductance value measuring circuit | |
| CN203502872U (en) | Adjuster with adjustable output voltages | |
| CN202230131U (en) | Digital AC voltage current combined meter having oscilloscope interface | |
| CN209311554U (en) | A kind of high precision electro current detection circuit | |
| CN203561691U (en) | High-precision circuit collection device | |
| CN203084061U (en) | Induction current sampling circuit | |
| CN209728053U (en) | A kind of simple digital control frequency characteristic tester device | |
| CN209559950U (en) | A kind of Novel universal table | |
| CN103439578A (en) | Impedance measurement circuit | |
| CN203232090U (en) | Alternating-current voltmeter with true root mean square | |
| CN202159096U (en) | Wide-range high-precision single-phase electric energy meter | |
| CN203037729U (en) | True RMS measuring meter | |
| CN207263827U (en) | A kind of guide rail type electrical energy meter circuit | |
| CN104777354A (en) | Charging system high-voltage metering device |
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 |
Granted publication date: 20140903 Termination date: 20141210 |
|
| EXPY | Termination of patent right or utility model |