CN86206596U - Multipurpose voltage detector - Google Patents
Multipurpose voltage detector Download PDFInfo
- Publication number
- CN86206596U CN86206596U CN 86206596 CN86206596U CN86206596U CN 86206596 U CN86206596 U CN 86206596U CN 86206596 CN86206596 CN 86206596 CN 86206596 U CN86206596 U CN 86206596U CN 86206596 U CN86206596 U CN 86206596U
- Authority
- CN
- China
- Prior art keywords
- voltage
- light emitting
- circuit
- emitting diode
- resistance
- 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.)
- Withdrawn
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a multipurpose voltage detector, belonging to a measuring apparatus for indicating the presence of an electric voltage, comprising an electric insulation housing [1], a metal probe with an electrical isolation protection handle [2], an electrical isolation sleeve barrel [3], an electrical isolation connecting wire [4], and a circuit board for detecting voltage. The utility model can be used for detecting the display of an alternating voltage and a direct current voltage within 6-380 volt, and can also distinguish the polarity or the phase wire. The multipurpose voltage detector is easy in use and more accurate than the existing low-voltage detector. The utility model has the advantages of low power consumption, and low cost.
Description
The utility model relates to a kind of measurement mechanism that exists of instructed voltage, and the multiple spot that is fit to combined-voltage in 6～380 volts of scopes detects the usefulness of demonstration.
The PTC element of the employing positive temperature coefficient resistor characteristic that existing multipoint voltage pick-up unit is produced as states such as the U.S. in 1985, West Germany constitutes the multirange electricity measurer of electronic circuit, though have the wide advantage of measurement range, but its instantaneous value by maximum current is about 200 milliamperes, and each Measuring Time must not be greater than 30 seconds.In addition, for measure high in during the voltage of resistance circuit, to measure required electric current little because of it provides, so that sensitivity descends is a lot, even can't measure.
Task of the present utility model is to provide that a kind of reference voltage detection wide (6～380 volts), display error are little, low in energy consumption, Measuring Time can extend to about one minute, can distinguish the cheap voltage-level detector of using of polarity and phase line more.
The utility model comprises electrical isolation shell (1), has electrical isolation to protect metal probe (2), electrical isolation sleeve (3), electrical isolation connection lead (4) and the voltage detecting circuit plate etc. of handle.The voltage detecting circuit plate is made up of the shunt resistance formula light emitting diode display circuit (8) of human body sensing voltage display circuit (5), bridge rectifier circuit (6), high back voltage transistors mu balanced circuit (7), high voltage range (110～380 volts), the shunt resistance formula light emitting diode display circuit (9) and the constant-current transistor circuit (10) of low-voltage range (50 volts following).
By metal probe of the present utility model (2), the electric current of circuit-under-test flows through corresponding voltage light emitting diode display circuit and constant-current circuit (10) behind bridge rectifier circuit (6), to show the voltage at circuit-under-test place.
The utility model has the advantages that: 1. detection sensitivity height, when magnitude of voltage be the mapping point voltage 90% the time can show; 2. the input impedance height is low in energy consumption; 3. detection time is unrestricted in principle, only relevant with the power of the current-limiting resistance of selecting for use.
Accompanying drawing 1 is many structural representations with voltage-level detector.
Accompanying drawing 2 is many electrical schematic diagrams with voltage-level detector.
Embodiment of the present utility model is made of attached Fig. 1 and 2, be provided with the mapping point voltage for ± 6 volts, ± 12 volts, ± 24 volts, ± 50 volts, ± 110 volts, ± 220 volts with ± 380 volts, use this device to detect voltage, with two probe (2) A and B cross-over connection when the electric loop, then tested electric current adds to transistor BG through bridge rectifier circuit (6)
1With transistor BG
2During the circuit formed, be that direct current is then as light emitting diode D as this voltage
5Luminous, represent that promptly probe A end is the negative pole of circuit-under-test; As be alternating current, light emitting diode D then
5And D
6All luminous.Light emitting diode D
5And D
6Both can be as the connection method of accompanying drawing 2, also can be in corresponding opposite side brachium pontis with its reconfiguration.Light emitting diode D
5And D
6The demonstration of also conduct ± 6 volt mapping point voltage.
When tested voltage is low, can not make stabilivolt D
14During puncture, transistor BG
1Be close to the saturation conduction state, 110～380 volts of voltage range display circuits do not show.When being 6 volts of left and right sides, forming enough electric currents through aforementioned circuit and make transistor BG as tested voltage
2Conducting, at this moment, light emitting diode D
5Or D
6Luminous (by the polarity decision of tested voltage), or D
5, D
6All luminous (during alternating current); When tested voltage is higher than 6 volts, during as 12 volts, light emitting diode D then
7Luminous, at this moment, transistor BG
2, light emitting diode D
7And resistance R
13The constant current loop that constitutes just plays the constant current effect, with the rising of tested voltage, and light emitting diode D
8, D
9Luminous successively.As when tested voltage is 24 volts, D then
8Luminous, and light emitting diode D
9Because of resistance R
11Shunting not luminous.When treating that tested voltage reaches 50 volts of left and right sides, D
9Luminous.
When tested voltage increases to the transistor BG that makes in the high back voltage transistors mu balanced circuit (7)
1The stabilivolt D that base stage connect
14Work, then the voltage major part of external circuit drops to BG
1Emitter and collector between, the shunt resistance light emitting diode display circuit (9) that guarantees the low-voltage range is not subjected to the influence of high voltage.
When tested voltage reaches more than 90% of 110 volts of mapping point voltages, light emitting diode D in the shunt resistance formula light emitting diode display circuit (8) of high voltage range
10, D
11And D
12Because the resistance R that is in parallel with it
9, R
8And R
7Shunting action, by voltage range of having set and precision, corresponding luminous with the rising of tested voltage.When tested voltage is higher than 380 volts, flow to BG
1Electric current by resistance R
6Shunt with high voltage range display circuit (8), make transistor BG
1Almost no longer flow through electric current, to guarantee its trouble free service.Diode D
13In order to guarantee BG
1When ending, make between its base stage and emitter not to be damaged.Just in case when bridge rectifier circuit (6) and high back voltage transistors mu balanced circuit (7) are breakdown, resistance R
1To blow rapidly, entire circuit is quit work.Capacitor C
1, C
2Make the usefulness of filtering, make alterating and direct current value unanimity.Be that light emitting diode one shunt resistance shows joint serial connection back and capacitor C in turn
1(or C
2) parallel connection.
By neon tube N, resistance R
14, and the inductance capacitance C of probe (2), housing (1) and human body formation
3The common phase line display circuit (5) of forming is by housing (1) the luminous demonstration of viewport topmost.
Among Fig. 1, have on the electrical isolation shell (1) display aperture (11), (12), (13), (14), (15), (16), (17), (18) and (19), pore size respectively with neon tube N, light emitting diode D
5, D
6, D
7, D
8, D
9, D
10, D
11And D
12Suitable.
In the present embodiment, diode D
1, D
2, D
3, D
4And D
13All adopt 2CZ821C commutation diode, triode BG
1Adopt DA2271 type, BG
2Adopt 3DG
6Triode, light emitting diode D
5, D
6, D
7, D
8, D
9, D
10, D
11And D
12All adopt LED701 type, resistance R
3And R
6Take RJ15-62K Ω, R
14With RJ14-1M Ω, R
1With RT14-200 Ω, R
2, R
12And R
5With RT14-1.5K Ω, R
7With RT14-390 Ω, R
8With RT14-750 Ω, R
9With RT14-2.2K Ω, R
10With RT14-4.3K Ω, R
11With RT14-470 Ω, R
13With RT14-1K Ω, capacitor C
1And C
2All use CD11-25V10 μ F.
In addition to the implementation, also can or change the mapping point voltage by principle of uniformity increase and decrease, for example, can be provided with the mapping point voltage for ± 6 volts, ± 9 volts, ± 12 volts, ± 15 volts, ± 18 volts, ± 24 volts, ± 50 volts, ± 110 volts, ± 220 volts, ± 380 volts.At this moment, as long as increase the resistance that corresponding light emitting diode one shunt resistance shows joint and changes current-limiting resistance, ± 9 volts demonstration is by as the base reference voltage source D in the constant-current transistor circuit (10)
7Bear.Promptly be, at this moment D
7± 9 volts of demonstration representatives mapping point voltage value rather than ± 12 volts mapping point voltage value.Usually, D
7Be to be used for showing and ± 6 volts of adjacent mapping point voltages.Same reason for 110 volts～380 volts display circuits (9) that detect range ability, is provided with the mapping point voltage as long as change, and its total current-limiting resistance numerical values recited will change, and light emitting diode one shunt resistance demonstration joint number is also wanted corresponding change.
Housing of the present utility model (1) and sleeve (3) all are equipped with the outstanding ring-type finger shield ring of outer rim, to guarantee user's safety.
The utility model is examined through reality, its all technical all meets corresponding industrial standard requirement, it both can be used as a kind of device with the existence that detects the accurate voltage of portable inspectiont that voltage range is wider, cost is low and durable, also can be used as the multipoint voltage of setting by the needs of industrial application and change display, be installed on the panel of electrical equipment.
Claims (1)
1, be used for 6～380 volts of range abilities with voltage-level detector more than a kind of and comprise electrical isolation shell [1], there is electrical isolation to protect the metal probe [2] of handle, electrical isolation sleeve [3], electrical isolation connects lead [4], the printed circuit board (PCB) of human body electrical verification display circuit [5] and installation voltage detecting circuit, display aperture [11] is arranged on the shell [1], [12], [13], [14], [15], [16], [17], [18] and [19], it is characterized in that voltage detecting circuit is by bridge rectifier circuit [6], high back voltage transistors mu balanced circuit [7], the shunt resistance formula light emitting diode display circuit [8] of high voltage range, the shunt resistance formula light emitting diode display circuit [9] and the constant-current transistor circuit [10] of low-voltage range are formed;
A) the input end string of said bridge rectifier circuit [6] has protective resistance R
1, the light emitting diode D that shows tested polarity of voltage and ± 6 volts of mapping point voltages is arranged on the brachium pontis
5And D
6
B) said high back voltage transistors mu balanced circuit [7] is by resistance R
3With stabilivolt D
14The reference voltage circuit, the dropping resistor R that constitute
2With transistor BG
1Form transistor BG
1Emitter and base stage between and meet a reverse protection diode D
13
C) the shunt resistance formula light emitting diode display circuit [8] of said high voltage range is by current-limiting resistance R
6And light emitting diode one shunt resistance that adapts with set mapping point voltage number show joint form resistance R
6With high back voltage transistors BG
1Collector be connected, all light emitting diodes in the shunt resistance formula light emitting diode display circuit [8]-shunt resistance show joint serial connection back and capacitor C in turn
2Be in parallel,
D) the shunt resistance formula light emitting diode display circuit [9] of said low-voltage range is by current-limiting resistance R
10Show that with the light emitting diode that adapts with set mapping point voltage number-shunt resistance joint forms resistance R
10With high back voltage transistors BG
1Emitter link, all light emitting diodes in the shunt resistance formula light emitting diode display circuit [9]-shunt resistance show joint serial connection back and capacitor C in turn
1Be in parallel;
E) said constant-current transistor circuit [10] comprises transistor BG
2, resistance R
13With the light emitting diode D that is used for showing with ± 6 volts of adjacent mapping point voltages
7
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206596 CN86206596U (en) | 1986-12-18 | 1986-12-18 | Multipurpose voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206596 CN86206596U (en) | 1986-12-18 | 1986-12-18 | Multipurpose voltage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86206596U true CN86206596U (en) | 1987-09-12 |
Family
ID=4809200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86206596 Withdrawn CN86206596U (en) | 1986-12-18 | 1986-12-18 | Multipurpose voltage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86206596U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281227B (en) * | 2007-12-29 | 2010-06-09 | 青岛海信电器股份有限公司 | Ground wire voltage and current detecting device |
| CN102121955A (en) * | 2010-01-07 | 2011-07-13 | 淮南矿业(集团)有限责任公司 | Circuit detection device |
-
1986
- 1986-12-18 CN CN 86206596 patent/CN86206596U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281227B (en) * | 2007-12-29 | 2010-06-09 | 青岛海信电器股份有限公司 | Ground wire voltage and current detecting device |
| CN102121955A (en) * | 2010-01-07 | 2011-07-13 | 淮南矿业(集团)有限责任公司 | Circuit detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206362879U (en) | Mutual inductor polarity detection means | |
| CN106771836A (en) | Mutual inductor polarity detection means | |
| CN111474401B (en) | High-voltage charged display device with fault detection function and fault detection method | |
| CN86206596U (en) | Multipurpose voltage detector | |
| CN211577386U (en) | Multifunctional power supply digital display type detector | |
| CN113960341A (en) | Ammeter and zero line detection circuitry falls thereof | |
| CN207502098U (en) | A kind of portable electronic fluid pressure detection device | |
| CN207367454U (en) | The training device that a kind of multiple meter for automobile uses | |
| CN100495847C (en) | Reverse current measurement and control system (SDA-N) | |
| CN2556652Y (en) | Universal test pencil | |
| CN110261738A (en) | A kind of substation cable core is to measuring instrument | |
| CN211235840U (en) | Soil detection equipment | |
| CN203490311U (en) | Two-stage filter detection circuit | |
| CN219799736U (en) | Circuit for detecting polarity of current transformer | |
| CN218445753U (en) | Electrical equipment fault diagnosis instrument | |
| CN206353198U (en) | A kind of LED indicating circuit for pointing out size of current | |
| CN210109218U (en) | Mutual inductor coil state detection circuit | |
| CN212255454U (en) | AC/DC signal conversion circuit and high-precision current voltmeter applied to same | |
| CN210468774U (en) | Current detection and protection device | |
| CN209296801U (en) | Potential detecting circuit and test pencil | |
| CN2172875Y (en) | Transistor on-line detector | |
| CN2272584Y (en) | Voltage tester | |
| CN209280787U (en) | A kind of electrical dedicated multimeter | |
| CN2177247Y (en) | Transistor judging instrument | |
| CN2224425Y (en) | universal test pencil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |