CN203606412U - Multifunctional low voltage test instrument - Google Patents
Multifunctional low voltage test instrument Download PDFInfo
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- CN203606412U CN203606412U CN201320756491.3U CN201320756491U CN203606412U CN 203606412 U CN203606412 U CN 203606412U CN 201320756491 U CN201320756491 U CN 201320756491U CN 203606412 U CN203606412 U CN 203606412U
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- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 47
- 238000000819 phase cycle Methods 0.000 claims abstract description 35
- 238000012937 correction Methods 0.000 claims abstract description 12
- 239000004065 semiconductor Substances 0.000 claims abstract description 6
- 230000019771 cognition Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 6
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 5
- 230000006870 function Effects 0.000 abstract description 18
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a multifunctional low voltage test instrument. The test instrument comprises a current-voltage conversion circuit, an R/V and V/V conversion circuit, a phase sequence discrimination circuit and a temperature-voltage conversion circuit, wherein the current-voltage conversion circuit, the R/V and V/V conversion circuit, the phase sequence discrimination circuit and the temperature-voltage conversion circuit are connected with a shifting circuit. The shifting circuit is connected with an analog-to-digital conversion circuit via a correction circuit. An intelligent display module with a display screen is connected with the analog-to-digital conversion circuit. The test instrument is characterized by being complete in functions. The test instrument achieves all the functions of other clamp meters of the same type, and further achieves functions of digital display phase sequence discrimination and semiconductor rapid temperature measurement. The test instrument is a multifunctional low voltage test instrument integrated with functions such as a clamp-on ammeter, an AC-DC voltmeter, live wire discrimination, temperature measurer and a phase sequence meter.
Description
Technical field:
The utility model relates to a kind of multifunctional low-voltage test instrumentation.
Background technology:
Equipment repair and maintenance in electric system are because repair apparatus, instrument that the various needs of overhauling project are used also can be a lot, and a kind of instrument just can only detect a project sometimes.The maintenance of at every turn going out all will be brought a lot of repair apparatus and instrument, makes our limited staff and time can not get sufficient utilization, has greatly increased our repair and maintenance preliminary work.The instrument of finding some maintenance use in working practice is for many years very similar, if some functions are concentrated in together, make a multiduty measuring instrument, so not only can reduce the quantity of the Portable device of going out, it is time saving and energy saving to accomplish, can also increase work efficiency.
Summary of the invention:
For overcoming the defect of prior art, the purpose of this utility model is to provide a kind of multifunctional low-voltage test instrumentation, and this instrument is easy and simple to handle, safety, economical and practical, and very easily promotes.In application, can greatly improve the whole efficiency of repair and maintenance work at the scene, also reduce the waste of repair apparatus, and from whole electric system, if this cover instrument is widely applied, will further reduce site examining and repairing maintenance cost.
The utility model technical solution problem adopts following technical scheme:
Multifunctional low-voltage test instrumentation, it comprises:
Is connected with gearshift circuit and to the analog voltage signal of gearshift circuit transmission amplify, the correction circuit of rectification, filtering;
The analog-to-digital conversion circuit that is used for receiving the analog voltage signal of described correction circuit transmission and analog voltage signal is converted into digital voltage signal;
For receiving the digital voltage signal of described analog-to-digital conversion circuit transmission the intelligent display module that digital voltage signal is processed and shown;
Be used for the current-voltage conversion circuit of measuring electric current and tested current signal being converted to analog voltage signal;
For test voltage, resistance and tested voltage resistance signal is converted to R/V, the V/V change-over circuit of analog voltage signal;
Be connected with the phase sequence cognition circuit detecting for phase sequence of phase sequence detection accessory;
For thermometric and measured signal is converted to the temperature-voltage conversion circuit of analog voltage signal, described temperature-voltage conversion circuit obtains measured signal by connecting semiconductor thermometric annex;
Described current-voltage conversion circuit, R/V, V/V change-over circuit, phase sequence cognition circuit and temperature-voltage conversion circuit are all connected with described gearshift circuit.
On described test instrumentation, be provided with the pincers of the testing current for measuring current that are connected with described current-voltage conversion circuit.
Described test instrumentation is provided with the positive input terminal, the negative input terminal that are connected with described R/V, V/V change-over circuit, and it is a pair of to be arranged at the injection moulding test pen of described positive input terminal, negative input end sub-connection.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, multifunctional low-voltage test instrumentation of the present utility model adopts Smart Panel design, can carry out current detecting, DC voltage measurement, ac voltage measurement, and these functions can complete all working of pincerlike meter of the same type in repair and maintenance.
2, the utility model can also carry out live wire differentiation, and this function has substituted the test instrumentation of other congenerous completely, and more convenient test in real work has also improved work efficiency simultaneously.
3, the utility model also can carry out phase sequence cognition, has replaced phase sequence cognition meter specially by external phase sequence detection accessory, has reduced testing apparatus in real work, makes test job convenient, quick.
4, the utility model also can carry out temperature detection, selects temperature range shelves when detection, connects thermometric annex, and probe is contacted testee by hand-held temperature probe handle, can quick and precisely show testee temperature value.
Accompanying drawing explanation:
Figure 1A, 1B, 1C, 1D are respectively the structural representation of the utility model multifunctional low-voltage test instrumentation, injection moulding test pen, phase sequence detection accessory and semiconductor thermometric annex; Fig. 2 is for adopting this instrument to carry out current measurement diagram; Fig. 3 is for adopting this instrument to carry out DC voltage measurement diagram; Fig. 4 is for adopting this instrument to carry out ac voltage measurement diagram; Fig. 5 differentiates diagram for adopting this instrument to carry out live wire; Fig. 6 connects diagram for carrying out phase sequence cognition; Fig. 7 is for carrying out temperature survey diagram; Fig. 8 is the utility model circuit frame principle figure; Fig. 9 is phase sequence cognition circuit diagram.
Number in the figure: 1 testing current pincers, 2 power buttons, maintenance button, 3 rotary switches, 4 function conversion keys, 5 negative input terminals, 6 positive input terminals, 7 injection moulding test pens, 8 phase sequence detection accessory, 9 thermometric annexes.
Below pass through embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
Embodiment:
Embodiment: in conjunction with Fig. 8, the multifunctional low-voltage test instrumentation of the present embodiment, its circuit theory comprises:
Is connected with gearshift circuit and to the analog voltage signal of gearshift circuit transmission amplify, the correction circuit of rectification, filtering; The analog-to-digital conversion circuit that is used for receiving the analog voltage signal of described correction circuit transmission and analog voltage signal is converted into digital voltage signal; For receiving the digital voltage signal of described analog-to-digital conversion circuit transmission the intelligent display module that digital voltage signal is processed and shown; Be used for the current-voltage conversion circuit of measuring electric current and tested current signal being converted to analog voltage signal; For test voltage, resistance and tested voltage resistance signal is converted to R/V, the V/V change-over circuit of analog voltage signal; Be connected with the phase sequence cognition circuit detecting for phase sequence of phase sequence detection accessory; For thermometric and measured signal is converted to the temperature-voltage conversion circuit of analog voltage signal, described temperature-voltage conversion circuit obtains measured signal by connecting semiconductor thermometric annex; Described current-voltage conversion circuit, R/V, V/V change-over circuit, phase sequence cognition circuit and temperature-voltage conversion circuit are all connected with described gearshift circuit.
Shown in Figure 1A-1D, instrument and annex comprise: for measuring the testing current pincers 1 of electric current, power button, keep button 2, for selecting the measurement range selection rotary switch 3 of different testing ranges, for selecting the function conversion keys 4 of different test functions for change-over circuit connected mode, when test, be suitable for the negative input terminal 5 of all tests, when test, be suitable for the positive input terminal 6 of all tests, 7 one pairs of two injection moulding test pens for test, the phase sequence detection accessory 8 detecting for phase sequence, for measuring the thermometric annex 9 of object temperature, for example adopt semiconductor temperature sensor etc.
Referring to Fig. 2, in the time measuring electric current with testing current pincers, by function conversion keys, current-voltage conversion circuit is connected to correction circuit by shift circuit, testing clamp senses tested electric current, tested current signal is converted to analog voltage signal through excess current-voltage conversion circuit, then by correction circuit, voltage signal is amplified, rectification, the useful signal that a series of processing such as filtering obtain wanting, by analog to digital conversion circuit, analog voltage signal is transformed into digital voltage signal again, intelligent display module is finally showing screen display result after digital voltage signal is processed.
Referring to Fig. 3,4, when with test test pencil measuring resistance, voltage, in like manner, change circuit connecting mode by function conversion keys, touch tested voltage, resistance by test pen, measured signal is converted to analog voltage signal, then entered the useful signal that a series of processing such as correction circuit amplifies, rectification, filtering obtain wanting through V/V, R/V change-over circuit, by analog to digital conversion circuit, analog voltage signal is become to digital voltage signal, finally showing screen display result.
Referring to Fig. 5, in like manner, change circuit connecting mode by function conversion keys, can carry out live wire differentiation, in the time differentiating, forward turn-knob switch to 750V range, will after black pen line winding multi-turn, hold in hand, then contact tested supply socket with a red probe, as instrument has the prompting of continuous three sound, represent that red pen connect is live wire, otherwise be zero line or ground wire.
Referring to Fig. 7, in the time carrying out temperature detection with thermometric annex, in like manner, change circuit connecting mode by function conversion keys, by thermometric annex contact measured signal, through excess temperature-voltage conversion circuit, signal is converted to analog voltage signal, then through correction circuit, processing obtains useful signal, become useful digital voltage signal through analog to digital conversion circuit again, be finally presented on screen.Rotary switch when detection, selects temperature range shelves, connects temperature probe, by function conversion keys switches " degree Celsius " show with " degrees Fahrenheit ", then hand-held temperature probe handle, contacts testee by probe, and confirms that contact is reliably.After stable reading, read the temperature value of measuring on display screen.
Referring to Fig. 6,9, in the time carrying out phase sequence cognition, in like manner, change circuit connecting mode by function conversion keys.Circuit of testing the phase sequence is made up of resistance R, diode IN4003, Zener IN758A, Sheffer stroke gate G1-G4, triode 2N1121, LED.Whole piece link is made up of phase sequence cognition circuit, amplifying circuit, current rectifying and wave filtering circuit, A/D change-over circuit etc.Connect measured signal by phase sequence detection accessory, the input signal of A, B, C three-phase is through diode and Zener, and signal is become rectangle logic-level pulses.Pulse signal is differentiated through the circuit of Sheffer stroke gate and triode composition again, and in the time that phase sequence is correct, G4 exports a string rect.p., and pulsewidth is 2.5ns, and LED light emitting diode is bright.When phase shortage or phase sequence are when incorrect, G4 is output as zero, LED light emitting diode and does not work.Signal through the output of phase sequence cognition circuit obtains useful signal by the processing of correction circuit, then through analog to digital conversion circuit, analog voltage signal is become to digital voltage signal, is finally presented on screen.In the time differentiating, function conversion keys is adjusted to phase sequence cognition state, shows screen display 000.Yellow/black/red line folder is connected respectively to three test end points of three-phase electricity, show ABC represent Huang/black/red line folder to connect power supply be positive phase sequence.If show, 00 is expressed as anti-phase or phase shortage, and red, black line folder are exchanged and surveyed once, still shows 00, and showing has phase shortage.This function has replaced phase sequence cognition meter specially, has reduced testing apparatus in real work, makes test job convenient, quick.
Claims (3)
1. multifunctional low-voltage test instrumentation, is characterized in that comprising:
Is connected with gearshift circuit and to the analog voltage signal of gearshift circuit transmission amplify, the correction circuit of rectification, filtering;
The analog-to-digital conversion circuit that is used for receiving the analog voltage signal of described correction circuit transmission and analog voltage signal is converted into digital voltage signal;
For receiving the digital voltage signal of described analog-to-digital conversion circuit transmission the intelligent display module that digital voltage signal is processed and shown;
Be used for the current-voltage conversion circuit of measuring electric current and tested current signal being converted to analog voltage signal;
For test voltage, resistance and tested voltage resistance signal is converted to R/V, the V/V change-over circuit of analog voltage signal;
Be connected with the phase sequence cognition circuit detecting for phase sequence of phase sequence detection accessory;
For thermometric and measured signal is converted to the temperature-voltage conversion circuit of analog voltage signal, described temperature-voltage conversion circuit obtains measured signal by connecting semiconductor thermometric annex;
Described current-voltage conversion circuit, R/V, V/V change-over circuit, phase sequence cognition circuit and temperature-voltage conversion circuit are all connected with described gearshift circuit.
2. multifunctional low-voltage test instrumentation according to claim 1, is characterized in that, is provided with the pincers of the testing current for measuring current that are connected with described current-voltage conversion circuit on described test instrumentation.
3. multifunctional low-voltage test instrumentation according to claim 1, it is characterized in that, described test instrumentation is provided with the positive input terminal, the negative input terminal that are connected with described R/V, V/V change-over circuit, and it is a pair of to be arranged at the injection moulding test pen of described positive input terminal, negative input end sub-connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756491.3U CN203606412U (en) | 2013-11-25 | 2013-11-25 | Multifunctional low voltage test instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756491.3U CN203606412U (en) | 2013-11-25 | 2013-11-25 | Multifunctional low voltage test instrument |
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| CN203606412U true CN203606412U (en) | 2014-05-21 |
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| CN201320756491.3U Expired - Fee Related CN203606412U (en) | 2013-11-25 | 2013-11-25 | Multifunctional low voltage test instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616545A (en) * | 2013-11-25 | 2014-03-05 | 国网安徽省电力公司滁州供电公司 | Multifunctional low-voltage testing instrument |
| CN109270317A (en) * | 2018-11-08 | 2019-01-25 | 国网江苏省电力有限公司南通供电分公司 | A kind of multifunction power measuring instrumentss |
-
2013
- 2013-11-25 CN CN201320756491.3U patent/CN203606412U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616545A (en) * | 2013-11-25 | 2014-03-05 | 国网安徽省电力公司滁州供电公司 | Multifunctional low-voltage testing instrument |
| CN109270317A (en) * | 2018-11-08 | 2019-01-25 | 国网江苏省电力有限公司南通供电分公司 | A kind of multifunction power measuring instrumentss |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20181125 |