CN205193158U - Portable resistance estimation device - Google Patents
Portable resistance estimation device Download PDFInfo
- Publication number
- CN205193158U CN205193158U CN201521046599.9U CN201521046599U CN205193158U CN 205193158 U CN205193158 U CN 205193158U CN 201521046599 U CN201521046599 U CN 201521046599U CN 205193158 U CN205193158 U CN 205193158U
- Authority
- CN
- China
- Prior art keywords
- housing
- potentiometer
- potentiometre
- knob
- voltage comparator
- 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
Abstract
Portable resistance estimation device relates to electrical tool technical field, and it includes casing (1), potentiometre (2), voltage comparison circuit, LED pilot lamp (3) and be used for inserting a pair of binding post (4) of treating detection circuitry, be equipped with potentiometre knob clearing hole and LED pilot lamp mounting hole on casing (1) respectively, potentiometre (2) and voltage comparison circuit install respectively on casing (1), and the adjust knob of potentiometre (2) passes potentiometre knob clearing hole and is located outside casing (1), the utility model discloses simple structure, the cost of manufacture is low, and a LED pilot lamp is only used to no pointer and display screen, and resistance just can be estimated fast to cooperation potentiometre knob. It is very miniature portable, light hanging on the key ring, the electrician can hand -carry the measuring circuit resistance of can meeting an urgent need in 24 hours under the condition of not carrying the multimeter. The operating current is lighter than 20mA, but time spent complete closure power not, very power saving.
Description
Technical field
The utility model relates to electrician tool technical field, is specifically related to portable resistance estimating apparatus.
Background technology
In daily life, electrician can not carry with heavy multimeter for 24 hours, to such an extent as to brings inconvenience owing to not being with multimeter sometimes.Meanwhile, the detection of domestic circuit, requires it is lower to the measuring accuracy of resistance, as long as often can know resistance roughly, just can determine circuit state.
Summary of the invention
The purpose of this utility model mainly in order to solve the problems of the technologies described above, and provides portable resistance estimating apparatus.
The utility model comprises housing, potentiometer, voltage comparator circuit, LED light and pair of terminals for accessing circuit to be detected, described housing is respectively equipped with potentiometer knob passing hole and LED light mounting hole, described potentiometer and voltage comparator circuit are arranged on housing respectively, the adjusting knob of potentiometer is positioned at outside housing through potentiometer knob passing hole, and potentiometer is electrically connected with voltage comparator circuit, described LED light is arranged on LED light mounting hole place on housing, and be electrically connected with voltage comparator circuit, described pair of terminals is electrically connected with voltage comparator circuit respectively by wire.
On described housing, potentiometer knob passing hole surrounding is provided with resistance indicating graduation.
Also have built-in power and power switch, described built-in power is arranged in housing, and is respectively each electrical part and powers, and described power switch controls the break-make between built-in power and each electrical part.
Also have key chain, described key chain is arranged on housing.
Described pair of terminals is crocodile clip.
The utility model advantage is: the utility model structure is simple, and cost of manufacture is low, pointer-free and display screen, only uses a LED light, coordinates potentiometer knob, just can estimate resistance fast.Very micro portable, easily hangs on key chain, and electrician can carry with for 24 hours, can when not carrying multimeter emergence measuring circuitous resistance.Working current is less than 20mA, and the used time can powered-down, very power saving completely.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is voltage comparator circuit principle schematic.
In figure: 1, housing; 2, potentiometer; 3, LED light; 4, pair of terminals; 5, power switch.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As Fig. 1, shown in 2, the utility model comprises housing 1, potentiometer 2, voltage comparator circuit, LED light 3 and pair of terminals 4 for accessing circuit to be detected, described housing 1 is respectively equipped with potentiometer knob passing hole and LED light mounting hole, described potentiometer 2 and voltage comparator circuit are arranged on housing 1 respectively, the adjusting knob of potentiometer 2 is positioned at outside housing 1 through potentiometer knob passing hole, and potentiometer 2 is electrically connected with voltage comparator circuit, described LED light 3 is arranged on LED light mounting hole place on housing 1, and be electrically connected with voltage comparator circuit, described pair of terminals 4 is electrically connected with voltage comparator circuit respectively by wire.
On described housing 1, potentiometer knob passing hole surrounding is provided with resistance indicating graduation.By means of only potentiometer knob on described housing 1, cooperated with LED indicating status, just directly can read circuit under test resistance from the scale around potentiometer knob.
Also have built-in power and power switch 5, described built-in power is arranged in housing 1, and is respectively each electrical part and powers, and described power switch 5 controls the break-make between built-in power and each electrical part.
Also have key chain, described key chain is arranged on housing 1.
Described pair of terminals 4 is crocodile clips.
Working method and principle: voltage comparator circuit adopts LM358 voltage comparator circuit, LM358 voltage comparator circuit anti-phase input terminal potential is constant is the half of supply voltage, i.e. 6V.The current potential of normal phase input end, depends on the ratio of the resistance of potentiometer and circuit under test.When the current potential of normal phase input end is higher than inverting input, LED light is luminous; Otherwise then extinguish.
During measurement, when the moment that regulator potentiometer makes its resistance equal with circuit under test resistance, the display state generation instantaneous variation (extinguish or light) of LED light.Now, the scale of potentiometer arrow instruction, just equals the resistance of circuit under test.
Just hang at ordinary times on key chain.Take off during use, power-on switch, two crocodile clips are connected with circuit under test respectively, then slowly potentiometer knob is rotated, the state of LED light changes moment of (extinguish or light), stop operating knob, now the scale of arrow alignment, is exactly the resistance of circuit under test.
Finish using, powered-down switch, hangs on key chain again.
Claims (5)
1. portable resistance estimating apparatus, it is characterized in that it comprises housing (1), potentiometer (2), voltage comparator circuit, LED light (3) and pair of terminals (4) for accessing circuit to be detected, described housing (1) is respectively equipped with potentiometer knob passing hole and LED light mounting hole, described potentiometer (2) and voltage comparator circuit are arranged on housing (1) respectively, the adjusting knob of potentiometer (2) is positioned at housing (1) outward through potentiometer knob passing hole, and potentiometer (2) is electrically connected with voltage comparator circuit, described LED light (3) is arranged on the upper LED light mounting hole place of housing (1), and be electrically connected with voltage comparator circuit, described pair of terminals (4) is electrically connected with voltage comparator circuit respectively by wire.
2. portable resistance estimating apparatus according to claim 1, is characterized in that the upper potentiometer knob passing hole surrounding of described housing (1) is provided with resistance indicating graduation.
3. portable resistance estimating apparatus according to claim 1, it is characterized in that also having built-in power and power switch (5), described built-in power is arranged in housing (1), and be respectively each electrical part and power, described power switch (5) controls the break-make between built-in power and each electrical part.
4. portable resistance estimating apparatus according to claim 1, it is characterized in that key chain in addition, described key chain is arranged on housing (1).
5. portable resistance estimating apparatus according to claim 1, is characterized in that described pair of terminals (4) is crocodile clip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521046599.9U CN205193158U (en) | 2015-12-16 | 2015-12-16 | Portable resistance estimation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521046599.9U CN205193158U (en) | 2015-12-16 | 2015-12-16 | Portable resistance estimation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205193158U true CN205193158U (en) | 2016-04-27 |
Family
ID=55786137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521046599.9U Expired - Fee Related CN205193158U (en) | 2015-12-16 | 2015-12-16 | Portable resistance estimation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205193158U (en) |
-
2015
- 2015-12-16 CN CN201521046599.9U patent/CN205193158U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Thakare et al. | Implementation of an energy monitoring and control device based on IoT | |
| CN202886592U (en) | Virtual load device of single-phase electric energy meter | |
| CN204116474U (en) | A kind of charger for mobile phone measurement jig | |
| CN205193158U (en) | Portable resistance estimation device | |
| CN203775050U (en) | Adjustable DC regulated power supply with Zener diode test function | |
| CN205643448U (en) | Intelligent electric power safety inspection device | |
| CN205317216U (en) | Pedometer standby current test system | |
| CN101430350A (en) | Electric power monitoring apparatus for real-time display of system power consumption | |
| CN203552056U (en) | Electric vehicle controller test system | |
| CN211206607U (en) | Current detection device and electronic apparatus | |
| CN203798953U (en) | Temperature controller contact on-off tester | |
| CN204166120U (en) | A kind of single-phase electric energy meter on-site pick-up unit | |
| CN205176223U (en) | Tester takes place for readable formula direct current | |
| CN103267899A (en) | Method for testing actuation inductance of automotive relay coil | |
| CN202676340U (en) | Relay contact pressure detection mechanism | |
| CN204731340U (en) | A kind of portable Intelligent terminal for Internet of things equipment failure intelligent detecting instrument | |
| CN204359868U (en) | A kind of portable phase order of 3-phase AC detecting device | |
| CN203732612U (en) | Under-voltage flicker indicating lamp | |
| CN204028248U (en) | Inductive ballast heat resistant test device | |
| CN203205652U (en) | Power plug displaying voltage and temperature | |
| CN203870154U (en) | Electric measurement system for cable fixture | |
| CN204334410U (en) | Motor power conditioning controller | |
| CN204422714U (en) | Common multimeter test controllable silicon expanding unit | |
| CN203365532U (en) | Usb interface voltage and current tester | |
| CN203012036U (en) | Current detector for overcurrent protector |
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: 20160427 Termination date: 20171216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |