CN109030927A - A kind of plurality of voltages routing inspection circuit - Google Patents
A kind of plurality of voltages routing inspection circuit Download PDFInfo
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- CN109030927A CN109030927A CN201810690620.0A CN201810690620A CN109030927A CN 109030927 A CN109030927 A CN 109030927A CN 201810690620 A CN201810690620 A CN 201810690620A CN 109030927 A CN109030927 A CN 109030927A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
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Abstract
The invention discloses a kind of plurality of voltages routing inspection circuits, belong to power-supply device field.A kind of plurality of voltages routing inspection circuit provided by the invention, it is realized by simple circuit, solve when detecting at present to plurality of voltages that bring lead is more by the way of a voltmeter all the way, it is bulky, the problem of being unfavorable for management and the wasting of resources, and the software programming professional technique etc. needed using intelligent control, and since the economic cost of the circuit is low so that it has applicability and practicability, the detection of more plurality of voltages can be extended to by eight basic tunnel modules, and need to certain all the way voltage carry out a period of time in monitoring when, the square-wave cycle of the i.e. changeable time base circuit of control switch K1 need to be only closed, the position monitored needed for quickly reaching, disconnecting K2 again can be realized, reach time saving effect.
Description
Technical field
The present invention relates to a kind of plurality of voltages routing inspection circuits, belong to power-supply device field.
Background technique
Currently, for the occasion for needing to monitor plurality of voltages, such as the voltage prison of the charge and discharge such as multiple batteries
Depending on, typically by the way of a voltmeter all the way, such method because of a voltmeter all the way, it is with higher at
Originally and it is bulky, it is unfavorable for managing；Meanwhile each road voltage is without being monitored always, so there is the wastings of resources
Problem；
Based on the above issues, occur much carrying out plurality of voltages the intelligent inspection tour instrument of inspection in the market, but this
A little intelligent inspection tour instruments need corresponding computer program mostly based on smart machine costly, once and change detection pair
As then needing to rewrite corresponding computer program, not having applicability and scalability, and equipment as used by it
Price problem, cause it not have the practicability of use of large-scale production.
Summary of the invention
In order to solve, presently, there are a voltmeter bring higher cost, volume are huge all the way when detecting to plurality of voltages
Greatly, the problem of being unfavorable for management and the wasting of resources, and but also with applicability and practicability, the present invention provides a kind of plurality of voltages
Routing inspection circuit, a kind of plurality of voltages routing inspection circuit, which is characterized in that the plurality of voltages routing inspection circuit includes basic eight road mould
Block, control circuit and voltmeter；
The control circuit includes second time-base generator, frequency divider and control switch；The basic eight tunnel module includes double 8
To 1 analog switch and coding display circuit；
The second time-base generator includes 1 time base circuit of chip IC, first resistor, first capacitor, the second capacitor, and the one or two
Pole pipe and the second diode；Wherein, 1 time base circuit of chip IC, first resistor, first capacitor, the second capacitor, first diode and
Second diode connects into square-wave generator, and the square-wave cycle of the square-wave generator is determined by first resistor and first capacitor,
Second capacitor is for preventing chip IC 1 from shaking；The first diode and the second diode are used for waveform shaping；
The frequency divider includes chip IC 2 and second resistance；
Whether the control switch K2 is used to control the output of time-base signal；
Double 8 pair of 1 analog switch includes chip IC 4；
The voltmeter is connected in chip IC 4, is connected to corresponding circuit-under-test by analog switch control.
The coding display circuit includes LED charactrons, decoder IC3 and 3rd resistor.
Optionally, the first resistor includes resistance R2, resistance R1, the control switch K1 for controlling the resistance R1
Whether square-wave cycle that time base circuit change the square-wave generator is accessed.
Optionally, the 3rd resistor includes current-limiting resistance R5~R11 and resistance R12；
When K2 is closed, the square-wave cycle of the square-wave generator is determined that frequency divider will be obtained by first resistor and capacitor C1
When base square wave be converted into binary data；Double 8 pair of 1 analog switch open 2 analog switches of corresponding binary system control bit,
The voltage signal being connected on 2 analog switches, which is output on external voltage table, to be shown；Meanwhile corresponding binary code quilt
The location number that LED charactrons show be connected to measured voltage, institute are supplied to by current-limiting resistance R5~R11 after decoder for decoding
State the voltage polling that plurality of voltages routing inspection circuit eight road voltages is fixed the period.
Optionally, the plurality of voltages routing inspection circuit, when control switch K2 is disconnected, frequency divider output data stops becoming
Change, the analog switch of corresponding position is opened, and the analog switch that voltmeter is used to open corresponding in eight road voltages is all the way
Voltage is monitored.
Optionally, the plurality of voltages routing inspection circuit, when plurality of voltages routing inspection circuit is in inspection state, control switch
When K1 is disconnected, K2 is closed, the square-wave cycle of the square-wave generator is determined by resistance R2 and capacitor C1；Control switch K1 closure,
When K2 is closed, the square-wave cycle of the square-wave generator is determined by resistance R1, the parallel resistance of resistance R2 and capacitor C1, square wave week
Phase shortens.
Optionally, the second resistance includes resistance R3 and R4.
Optionally, the 1 foot ground connection of the chip IC 1,2 feet and 6 feet be connected to the anode of diode VD1, VD2 cathode and
The anode of capacitor C1, capacitor C1 cathode ground connection, 3 feet are connected to 1 foot of chip IC 2,4 feet and the connection of 8 feet by control switch K2
In positive pole, 7 feet are connected to the anode of power supply by resistance R2, while 7 feet are being connected to the cathode of diode VD1, VD2 just
It is parallel to resistance R2 after pole, control switch K1 and resistance R1 series connection, 5 feet are grounded by capacitor C2；
1 foot of the chip IC 2 is grounded by resistance R3, and 2 feet are grounded by resistance R4, and 7 feet ground connection, 14 feet are connected to electricity
Source anode, chip IC 2 send control signal to chip IC 3 and chip IC 4 by 12 feet, 11 feet and 9 feet；
9~15 feet of the chip IC 3, which pass through current-limiting resistance R5~R11 driving LED charactrons respectively and show, to be connected to
The location number of measured voltage；3 feet, 4 feet and 16 feet are connected to positive pole, and 5 feet and 8 feet ground connection, 6 feet are grounded by resistance R12,
The control signal that chip IC 3 receives corresponding 12 foot of chip IC 2 by 7 feet, 2 feet and 1 foot, 11 feet and 9 human hair combing wastes are sent；
The control that the chip IC 4 receives 212 foot of chip IC by 10 feet, 11 feet and 14 feet, 11 feet and 9 human hair combing wastes are sent is believed
Number, 1 foot and 17 feet connection voltmeter cathode and anode, 12 feet and 13 feet ground connection, remaining foot connect 8 road voltage signals, and 9~2 pairs of foot
Answer 0~7 road negative pole end of measured voltage, corresponding 0~7 road positive terminal of measured voltage of foot 23~15.
The medicine have the advantages that
Realize solve when detecting at present to plurality of voltages using the side of a voltmeter all the way by simple circuit
The problem of formula bring lead is more, bulky, is unfavorable for management and the wasting of resources, and use the soft of intelligent control needs
Part works out professional technique etc., and since the economic cost of the circuit is low so that it has applicability and practicability, by basic
Eight tunnel modules can be extended to the detection of more plurality of voltages, and need to the monitoring in certain all the way voltage progress a period of time
When, it need to be only closed the square-wave cycle of the i.e. changeable time base circuit of control switch K1, the position monitored needed for quickly reaching, then disconnect
K2 can be realized, and reach time saving effect.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of plurality of voltages routing inspection circuit figure provided by the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one:
The present embodiment provides a kind of plurality of voltages routing inspection circuits, and referring to Fig. 1, the plurality of voltages routing inspection circuit includes basic
Eight tunnel modules, control circuit and voltmeter；
The control circuit includes second time-base generator, frequency divider and control switch；The basic eight tunnel module includes double 8
To 1 analog switch and coding display circuit；
The second time-base generator includes 1 time base circuit of chip IC, first resistor, first capacitor, the second capacitor, and the one or two
Pole pipe and the second diode；Wherein, 1 time base circuit of chip IC, first resistor, first capacitor, the second capacitor, first diode and
Second diode connects into square-wave generator, and the square-wave cycle of the square-wave generator is determined by first resistor and first capacitor,
Second capacitor is for preventing chip IC 1 from shaking；The first diode and the second diode are used for waveform shaping；
The frequency divider includes chip IC 2 and second resistance；
Whether the control switch K2 is used to control the output of time-base signal；
Double 8 pair of 1 analog switch includes chip IC 4；
The voltmeter is connected in chip IC 4, is connected to corresponding circuit-under-test by analog switch control.
The coding display circuit includes LED charactrons, decoder IC3 and 3rd resistor.
Wherein, the first resistor includes resistance R2, resistance R1, and the control switch K1, which is used to control the resistance R1, is
No access time base circuit changes the square-wave cycle of the square-wave generator.
The second resistance includes resistance R3 and R4.
The 3rd resistor includes current-limiting resistance R5~R11 and resistance R12；
When K2 is closed, the square-wave cycle of the square-wave generator is determined that frequency divider will be obtained by first resistor and capacitor C1
When base square wave be converted into binary data；Double 8 pair of 1 analog switch open 2 analog switches of corresponding binary system control bit,
The voltage signal being connected on 2 analog switches, which is output on external voltage table, to be shown；Meanwhile corresponding binary code quilt
The location number that LED charactrons show be connected to measured voltage, institute are supplied to by current-limiting resistance R5~R11 after decoder for decoding
State the voltage polling that plurality of voltages routing inspection circuit eight road voltages is fixed the period.
When control switch K2 is disconnected, frequency divider output data stops variation, and the analog switch of corresponding position is opened, voltage
Table is used to be monitored the voltage all the way for corresponding to the analog switch opened in eight road voltages.
When plurality of voltages routing inspection circuit is in inspection state, when control switch K1 is disconnected, K2 is closed, the square wave occurs
The square-wave cycle of device is determined by resistance R2 and capacitor C1；When control switch K1 closure, K2 closure, the square wave of the square-wave generator
Period is determined that square-wave cycle shortens by resistance R1, the parallel resistance of resistance R2 and capacitor C1.
Chip IC 1 is NE555, chip IC 2 is 7 binary divider CD4024, chip IC 3 is CD4511, chip IC 4
For CD4097.
1 foot of the chip IC 1 is grounded, and 2 feet and 6 feet are connected to the anode of diode VD1, the cathode of VD2 and capacitor C1
Anode, capacitor C1 cathode ground connection, 3 feet are connected to 1 foot of chip IC 2 by control switch K2, and 4 feet and 8 feet are connected to power supply
Anode, 7 feet are connected to the anode of power supply by resistance R2, while 7 feet are connected to the anode of the cathode of diode VD1, VD2, control
It is parallel to resistance R2 after system switch K1 and resistance R1 series connection, 5 feet are grounded by capacitor C2；
1 foot of the chip IC 2 is grounded by resistance R3, and 2 feet are grounded by resistance R4, and 7 feet ground connection, 14 feet are connected to electricity
Source anode, chip IC 2 send control signal to chip IC 3 and chip IC 4 by 12 feet, 11 feet and 9 feet；
9~15 feet of the chip IC 3, which pass through current-limiting resistance R5~R11 driving LED charactrons respectively and show, to be connected to
The location number of measured voltage；3 feet, 4 feet and 16 feet are connected to positive pole, and 5 feet and 8 feet ground connection, 6 feet are grounded by resistance R12,
The control signal that chip IC 3 receives corresponding 12 foot of chip IC 2 by 7 feet, 2 feet and 1 foot, 11 feet and 9 human hair combing wastes are sent；
The control that the chip IC 4 receives 212 foot of chip IC by 10 feet, 11 feet and 14 feet, 11 feet and 9 human hair combing wastes are sent is believed
Number, 1 foot and 17 feet connection voltmeter cathode and anode, 12 feet and 13 feet ground connection, remaining foot connect 8 road voltage signals, and 9~2 pairs of foot
Answer 0~7 road negative pole end of measured voltage, corresponding 0~7 road positive terminal of measured voltage of foot 23~15.
Each pair of 80 ohm of CD4097 analog switch internal resistance, amount to 160 ohms, since the internal resistance of voltmeter is very big, institute
Influence with the internal resistance of CD4097 analog switch to voltage measurement accuracy can be ignored.
For example, 9 feet and the connection of 1 foot, internal resistance is 80 ohm when first via voltage detecting, 23 feet and the connection of 17 feet, internal resistance are
80 ohm, amount to 180 ohm.
Such as Fig. 1, the plurality of voltages routing inspection circuit, there are 2 kinds of working methods:
Working method one, inspection in order:
The square wave that the NE555 of time base circuit IC1 is generated is exported through 3 feet, at this point, K1 is disconnected, square-wave cycle is determined by R2, C1
Fixed, the period about 1 second, this period directly determined that voltmeter shows that the time interval of each road voltage is 1 second or so.At this point, K2 is closed,
Obtained when base square wave is converted into binary data by the CD4024 of frequency divider IC2.The CD4097 of eight path analoging switch IC4 will be right
2 analog switches of binary system control bit are answered to open, voltage signal of the connection on this 2 switch, which is output on external voltage table, to be shown
Show.At the same time, corresponding binary code is decoded after the CD4511 decoding of device IC3 and is supplied to seven by current-limiting resistance R5-R11
Section LED charactrons show the location number of be connected to measured voltage.
Working method two rests on specific position monitoring voltage:
Referring to working method one, plurality of voltages routing inspection circuit is when carrying out inspection to plurality of voltages, if necessary to wherein
The continuous monitoring in certain time is carried out all the way, then in the location number that seven sections of LED charactrons displays need to position, is disconnected
K2, IC2 output data stop variation, and the analog switch of corresponding position is opened for a long time, and voltmeter is used to carry out this road voltage
Monitor the road voltage for a long time, until K2 is closed, circuit continues inspection.
The plurality of voltages routing inspection circuit can be extended to more multichannel voltage polling by eight basic tunnel modules, for example work as expansion
When 80 road voltage polling of Zhan Wei, show that the time is 1 second per voltage all the way, when needs are to the company wherein carried out all the way in certain time
When continuous monitoring, wait it is to be recycled monitor required position and may need the long period, for this purpose, specially devise K1, when K1 closure,
The period of base square wave is determined by R1 and R2 parallel resistance with C1 when decision, about 1/4 second, can accelerate monitoring needed for reaching
The time is saved in position.
In practical application, time base variable side can also be changed by changing the resistance value (for example swept resistance can be used) of R1 and R2
The period of wave.
A kind of plurality of voltages routing inspection circuit provided by the invention, realizes solve at present to multichannel by simple circuit
Bring lead is more, bulky by the way of a voltmeter all the way when voltage is detected, and is unfavorable for management and resource
The problem of waste, and the software programming professional technique etc. needed using intelligent control, and since the economic cost of the circuit is low,
So that it has applicability and practicability, the detection of more plurality of voltages can be extended to by eight basic tunnel modules, and needing
Will to certain all the way voltage carry out a period of time in monitoring when, only need to be closed control switch K1 i.e. can be changed time base circuit square wave
Period, the position monitored needed for quickly reaching, then disconnect K2 and can be realized, reach time saving effect.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of plurality of voltages routing inspection circuit, which is characterized in that the plurality of voltages routing inspection circuit includes basic eight tunnel module, control
Circuit and voltmeter processed；
The control circuit includes second time-base generator, frequency divider and control switch；The basic eight tunnel module includes 8 pair 1 double
Analog switch and coding display circuit；
The second time-base generator includes 1 time base circuit of chip IC, first resistor, first capacitor, the second capacitor, first diode
With the second diode；Wherein, 1 time base circuit of chip IC, first resistor, first capacitor, the second capacitor, first diode and second
Diode connects into square-wave generator, and the square-wave cycle of the square-wave generator is determined by first resistor and first capacitor, described
Second capacitor is for preventing chip IC 1 from shaking；The first diode and the second diode are used for waveform shaping；
The frequency divider includes chip IC 2 and second resistance；
Whether the control switch K2 is used to control the output of time-base signal；
Double 8 pair of 1 analog switch includes chip IC 4；
The voltmeter is connected in chip IC 4, is connected to corresponding circuit-under-test by analog switch control.
The coding display circuit includes LED charactrons, decoder IC3 and 3rd resistor.
2. plurality of voltages routing inspection circuit according to claim 1, which is characterized in that the first resistor include resistance R2,
Resistance R1, the control switch K1 are for controlling whether the resistance R1 accesses the side that time base circuit changes the square-wave generator
Wave period.
3. plurality of voltages routing inspection circuit according to claim 2, which is characterized in that the 3rd resistor includes current-limiting resistance
R5~R11 and resistance R12；
K2 be closed when, the square-wave cycle of the square-wave generator is determined by first resistor and capacitor C1, frequency divider by obtain when
Base square wave is converted into binary data；Double 8 pair of 1 analog switch open 2 analog switches of corresponding binary system control bit, connection
Voltage signal on 2 analog switches, which is output on external voltage table, to be shown；Meanwhile corresponding binary code is decoded
It is supplied to the location number that LED charactrons show be connected to measured voltage by current-limiting resistance R5~R11 after device decoding, it is described more
Road voltage polling circuit eight road voltages is fixed the voltage polling in period.
4. plurality of voltages routing inspection circuit according to claim 3, which is characterized in that the plurality of voltages routing inspection circuit works as control
When making switch K2 disconnection, frequency divider output data stops variation, and the analog switch of corresponding position is opened, and voltmeter is used for eight tunnels
The voltage all the way for corresponding to the analog switch opened in voltage is monitored.
5. according to right want 4 described in plurality of voltages routing inspection circuit, which is characterized in that the plurality of voltages routing inspection circuit, when more
When road voltage polling circuit is in inspection state, when control switch K1 is disconnected, K2 is closed, the square-wave cycle of the square-wave generator
It is determined by resistance R2 and capacitor C1；When control switch K1 closure, K2 closure, the square-wave cycle of the square-wave generator is by resistance
R1, the parallel resistance of resistance R2 and capacitor C1 determine that square-wave cycle shortens.
6. according to right want 5 described in plurality of voltages routing inspection circuit, which is characterized in that the second resistance include resistance R3 and
R4。
7. plurality of voltages routing inspection circuit according to claim 6, which is characterized in that 1 foot of the chip IC 1 is grounded, 2 feet
The anode, the cathode of VD2 and the anode of capacitor C1 of diode VD1, capacitor C1 cathode ground connection are connected to 6 feet, 3 feet pass through control
Switch K2 is connected to 1 foot of chip IC 2, and 4 feet and 8 feet are connected to positive pole, and 7 feet are being connected to power supply just by resistance R2
Pole, while 7 feet are connected to the anode of the cathode of diode VD1, VD2, are parallel to resistance after control switch K1 and resistance R1 series connection
R2,5 feet are grounded by capacitor C2；
1 foot of the chip IC 2 is grounded by resistance R3, and 2 feet are grounded by resistance R4, and 7 feet ground connection, 14 feet are being connected to power supply just
Pole, chip IC 2 send control signal to chip IC 3 and chip IC 4 by 12 feet, 11 feet and 9 feet；
9~15 feet of the chip IC 3 pass through current-limiting resistance R5~R11 driving LED charactrons respectively and show that is be connected to is tested
The location number of voltage；3 feet, 4 feet and 16 feet are connected to positive pole, and 5 feet and 8 feet ground connection, 6 feet are grounded by resistance R12, chip
The control signal that IC3 receives corresponding 12 foot of chip IC 2 by 7 feet, 2 feet and 1 foot, 11 feet and 9 human hair combing wastes are sent；
The control signal that the chip IC 4 receives 212 foot of chip IC by 10 feet, 11 feet and 14 feet, 11 feet and 9 human hair combing wastes are sent, 1 foot
Voltmeter cathode and anode, 12 feet and 13 feet ground connection are connected with 17 feet, remaining foot connects 8 road voltage signals, and foot 9~2 is corresponding tested
0~7 road negative pole end of voltage, corresponding 0~7 road positive terminal of measured voltage of foot 23~15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690620.0A CN109030927A (en) | 2018-06-28 | 2018-06-28 | A kind of plurality of voltages routing inspection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810690620.0A CN109030927A (en) | 2018-06-28 | 2018-06-28 | A kind of plurality of voltages routing inspection circuit |
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| CN109030927A true CN109030927A (en) | 2018-12-18 |
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ID=65520828
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| CN201810690620.0A Pending CN109030927A (en) | 2018-06-28 | 2018-06-28 | A kind of plurality of voltages routing inspection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896575A (en) * | 2019-12-17 | 2020-03-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4847750A (en) * | 1971-10-13 | 1973-07-06 | ||
| CN2121726U (en) * | 1992-05-23 | 1992-11-11 | 童本廉 | Adjustable multiway test device |
| CN2364450Y (en) * | 1999-03-18 | 2000-02-16 | 华南理工大学 | Pressure data logger for single-chip microcomputer textile plant equipment |
| CN2589994Y (en) * | 2002-12-13 | 2003-12-03 | 南京华卓电子实业有限公司 | Portable voltage detecting instrument |
| CN2747562Y (en) * | 2004-07-21 | 2005-12-21 | 中国科学院广州电子技术研究所 | Temperature-humidity polling measurer |
| CN200959173Y (en) * | 2006-05-26 | 2007-10-10 | 龚景康 | Safety driving controller of multifunctional intelligent automobile |
| CN105841835A (en) * | 2015-12-31 | 2016-08-10 | 西安航天精密机电研究所 | Temperature tour inspection circuit |
-
2018
- 2018-06-28 CN CN201810690620.0A patent/CN109030927A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4847750A (en) * | 1971-10-13 | 1973-07-06 | ||
| CN2121726U (en) * | 1992-05-23 | 1992-11-11 | 童本廉 | Adjustable multiway test device |
| CN2364450Y (en) * | 1999-03-18 | 2000-02-16 | 华南理工大学 | Pressure data logger for single-chip microcomputer textile plant equipment |
| CN2589994Y (en) * | 2002-12-13 | 2003-12-03 | 南京华卓电子实业有限公司 | Portable voltage detecting instrument |
| CN2747562Y (en) * | 2004-07-21 | 2005-12-21 | 中国科学院广州电子技术研究所 | Temperature-humidity polling measurer |
| CN200959173Y (en) * | 2006-05-26 | 2007-10-10 | 龚景康 | Safety driving controller of multifunctional intelligent automobile |
| CN105841835A (en) * | 2015-12-31 | 2016-08-10 | 西安航天精密机电研究所 | Temperature tour inspection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896575A (en) * | 2019-12-17 | 2020-03-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
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