CN107422182A - Direct current energy meter - Google Patents
Direct current energy meter Download PDFInfo
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- CN107422182A CN107422182A CN201710445423.8A CN201710445423A CN107422182A CN 107422182 A CN107422182 A CN 107422182A CN 201710445423 A CN201710445423 A CN 201710445423A CN 107422182 A CN107422182 A CN 107422182A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/08—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using analogue techniques
Abstract
Direct current energy meter, including：Voltage sample module；The voltage signal isolation module being connected with the voltage sample module；The analog-digital converter being connected with the voltage signal isolation module；Sampling module is galvanically isolated with what the analog-digital converter was connected；The controller being connected with the analog-digital converter, the controller are connected with button and display module；The voltage sample module is by the d. c. voltage signal of collection by being sent to the analog-digital converter after the voltage signal isolation module, the sampling module that is galvanically isolated gathers DC current signal on the basis of electrical isolation and is sent to the analog-digital converter, and the analog-digital converter is sent to the controller after voltage analog data and current-mode analog quantity data are converted into data signal.The present invention realizes direct current energy meter and isolated with direct current network, safe, and voltage and current signal sampling is accurate, and conversion biased error is small, and the accuracy of measuring is high.
Description
Technical field
The invention belongs to Electric Energy Metering Technology field, and in particular to a kind of direct current energy meter.
Background technology
With the development and the improvement of people's living standards of national economy technology, electric energy has become people's production and life
Mostly important secondary energy sources in work, play very important effect.In recent years, as fossil resource constantly reduces, environmental protection
Theory deepens continuously, and finds the reproducible energy into an important problem of our times various countries.Photovoltaic generation, wind-force hair
Electricity is comparatively ideal renewable energy power generation technology, and development speed is rapid, and it is usually direct current energy that it, which is exported,.As track is handed over
Logical, electric automobile popularization, direct current are also further applicable in actual life.
Therefore, as the application of direct current, the measurement problem of direct current energy gradually show：Traditional direct current energy meter
Measurement dynamic range is small, and the accuracy of measuring is not high during small-power, and Traditional DC electric energy meter can not isolate with direct current network, electricity
There can be power network high pressure inside table, cause the security of electric energy meter not high, such as user passes through button and liquid crystal display and electric energy meter
Carry out unavoidably contacting the part such as electric energy meter button and shell during the operation such as information exchange, if inside electric energy meter existed high
Certain security risk be present in pressure, user.
The content of the invention
Isolate it is an object of the invention to provide a kind of accurate measurement while can realize with direct current network, be safe
Direct current energy meter
To achieve these goals, the present invention takes following technical solution：
Direct current energy meter, including：Voltage sample module；The voltage signal isolation mode being connected with the voltage sample module
Block；The analog-digital converter being connected with the voltage signal isolation module；What is be connected with the analog-digital converter is galvanically isolated sampling
Module；The controller being connected with the analog-digital converter, the controller are connected with button and display module；The voltage sample
Module is by the d. c. voltage signal of collection by being sent to the analog-digital converter, the electricity after the voltage signal isolation module
Stream isolation sampling module gathers DC current signal on the basis of electrical isolation and is sent to the analog-digital converter, the mould
Number converter is sent to the controller after voltage analog data and current-mode analog quantity data are converted into data signal.
More specifically, the voltage sample module is in series by multiple divider resistances, and the voltage for divider resistance of connecting is adopted
Sample input is connected with the anode of d. c. voltage signal, voltage sample output end and the voltage signal isolation mode of divider resistance of connecting
The first voltage signal input part of block is connected, and the voltage sample output end for divider resistance of connecting is grounded through first resistor simultaneously, institute
State the earth terminal of first resistor be connected with the negative terminal of d. c. voltage signal and with the second voltage signal of voltage signal isolation module
Input is connected.
More specifically, the voltage signal isolation module include isolating amplifier circuit and with the isolating amplifier circuit phase
The first Anti-aliasing Filter Circuits even, wherein, isolating amplifier circuit is connected with the voltage sample module, the first anti-aliasing filter
Circuit is connected with the analog-digital converter.
More specifically, the isolating amplifier circuit is the isolated amplifier that model is AMC1200, the isolated amplifier
1 pin is connected with insulating power supply positive pole, and 2 pin are connected with the positive output end of voltage sample module, and 3 pin are negative defeated with voltage sample module
Go out end to be connected, 4 pin with connecing insulating power supply, 5 pin with connecing internal electric source, 6 pin and 7 pin respectively with the first Anti-aliasing Filter Circuits phase
Even, 8 pin are connected with internal electric source positive pole.
More specifically, first Anti-aliasing Filter Circuits include the first electric capacity, the second electric capacity, the 3rd electric capacity second resistance
And 3rd resistor；Wherein, one end of the second resistance is connected with the first amplified signal output end of isolating amplifier circuit, is another
End is connected with the analog converter and simultaneously through first capacity earth；One end of the 3rd resistor is with isolating amplification electricity
The second amplified signal output end on road is connected, the other end is connected with the analog converter and connect simultaneously through the 3rd electric capacity
Ground, second capacitance connection is between the output end of second resistance and the output end of 3rd resistor.
More specifically, the sampling module that is galvanically isolated includes current sensor, current sampling resistor and second anti-aliasing
Filter circuit；The size of electric current on the current sensor measurement electric current line, and analog current signal is exported, analog signal is through institute
State after current sampling resistor carries out signal conversion and export to second Anti-aliasing Filter Circuits, by second anti-aliasing filter
Exported after circuit filtering to the analog-digital converter.
More specifically, the current sensor uses model TEC300C15-T1 current sensor, current sensor
1 pin connection+12V power supplys, 2 pin connection -12V power supplys, 3 pin are connected with the second Anti-aliasing Filter Circuits, and 4 pin are hanging.
More specifically, second Anti-aliasing Filter Circuits include the 4th resistance, the 5th resistance, the 4th electric capacity, the 5th electricity
Hold and the 6th electric capacity, an output end of the current sensor are connected with current sampling resistor, the other end of current sampling resistor
It is grounded and is connected simultaneously with the 5th resistance, the other end of the 5th resistance is connected with analog-digital converter and is followed by simultaneously through the 5th electric capacity
Ground；The output end of the current sensor is also connected through the 4th resistance with analog-digital converter, the 4th resistance it is another
End simultaneously be grounded after the 4th electric capacity, the 6th capacitance connection the 4th resistance output end and the 5th resistance output end it
Between.
More specifically, the analog-digital converter uses model ADS1147 modulus conversion chip, modulus conversion chip
1 pin connects the positive pole of digital power, and digitally, 4 pin connection reset signal, 5 pin, 6 pin are hanging, and 7 pin are through the 7th for 2 pin, the connection of 3 pin
Capacity earth, 8 pin ground connection, the output end of 9 pin, 10 pin respectively with voltage signal isolation module is connected, 11 pin, 12 pin respectively with electricity
The output end of stream isolation sampling module is connected, and 13 pin, 14 pin connection analog power, 15~20 pin are connected with controller, receive control
The control of device processed and output digit signals are to controller.
From above technical scheme, direct current energy meter of the present invention has voltage signal isolation module and is galvanically isolated sampling
Module, it can realize and to isolate with direct current network, improve electric energy meter security, ensure that user's safe operation, while using high
The analog-digital converter of precision, there is the characteristics of biased error is small, precision is high, avoid common analog-digital converter due to biased error
DC measurement error caused by big.The present invention can accurately be measured to direct current energy, is solved and is measured in Traditional DC metering
Dynamic range is small, small-power when the accuracy of measuring is not high, the problems such as can not isolating with power network.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, below will be to required use in embodiment or description of the prior art
Accompanying drawing do simple introduction, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is the block diagram of the embodiment of the present invention；
Fig. 2 is voltage sample of embodiment of the present invention module, voltage signal isolation module, is galvanically isolated sampling module and modulus
The circuit diagram of converter；
Fig. 3 is the flow chart that electric energy metrical is carried out using the present invention.
The embodiment of the present invention is described in more detail below in conjunction with accompanying drawing.
Embodiment
As shown in figure 1, the direct current energy meter of the present embodiment includes：Voltage sample module 1, voltage signal isolation module 2, electricity
Stream isolation sampling module 3, analog-digital converter 4, controller 5 and the button being connected with controller 5 and display module (not shown).
Wherein, voltage sample module 1 is connected with voltage signal isolation module 2, voltage signal isolation module 2 and is galvanically isolated sampling module
3 are connected with analog-digital converter 4 respectively, and analog-digital converter 4 is connected with controller 5.
Electrical isolation, voltage are carried out by voltage signal isolation module 2 between voltage sample module 1 and analog-digital converter 4
Sampling module 1 is by the d. c. voltage signal (voltage analog data) of collection by being sent to mould after voltage signal isolation module 2
Number converter 4.It is galvanically isolated sampling module 3 and gathers DC current signal on the basis of electrical isolation, and by the electric current of collection
Analog data is sent to analog-digital converter 4.Analog-digital converter 4 is converted to voltage analog data and current-mode analog quantity data
Controller 5 is sent to after data signal, gathered data is handled by controller 5.
As shown in Fig. 2 the voltage sample module 1 of the present embodiment be by multiple divider resistances (RA14, RA15, RA16,
RA17, RA18, RA19, RA20, RA21, RA22, RA23) voltage sampling circuit in series, series connection divider resistance (R14)
One end (voltage sample input) is connected with the anode of d. c. voltage signal, the other end (voltage sample output end) and voltage signal
The first voltage signal input part of isolation module 2 is connected, and the voltage sample output end for divider resistance of connecting is simultaneously through first resistor
RAT is grounded, and first resistor RAT earth terminal is connected with the negative terminal of d. c. voltage signal, first resistor RAT earth terminal simultaneously with
The second voltage signal input part of voltage signal isolation module 2 is connected.
Voltage signal isolation module 2 includes connected isolating amplifier circuit and the first Anti-aliasing Filter Circuits, isolation amplification
Circuit is connected with voltage sample module 1, and the first Anti-aliasing Filter Circuits are connected with analog-digital converter 4.The isolation of the present embodiment is put
Big circuit uses model AMC1200 isolated amplifier U8.Isolated amplifier U8 1 pin and insulating power supply positive pole VCC1 phases
Even, 2 pin and 3 pin are voltage signal input pin, the positive output end (output for divider resistance of connecting of 2 pin and voltage sample module 1
End) be connected, that is, connect the positive pole of the voltage signal through partial pressure, the negative output terminal of 3 pin and voltage sample module 1 be (first resistor
Earth terminal) be connected, that is, connect the negative pole of the voltage signal through partial pressure, 4 pin with connecing insulating power supply, 5 pin with connecing internal electric source, 6 pin,
7 pin are amplified signal output pin, and first, second amplified signal of 6 pin and 7 pin respectively with the first Anti-aliasing Filter Circuits inputs
End is connected, and 8 pin are connected with internal electric source positive pole AVCC.Voltage signal exports after being filtered by the first Anti-aliasing Filter Circuits
To analog-digital converter 4.
First Anti-aliasing Filter Circuits of the present embodiment include the first electric capacity CA1, the second electric capacity CA2, the 3rd electric capacity CA3 with
And second resistance RA13 and 3rd resistor RA24.Wherein, second resistance RA13 input is as the first Anti-aliasing Filter Circuits
The first amplified signal input, be connected with the first amplified signal output end (7 pin) of isolating amplifier circuit, second resistance RA13
First output end of the other end as filtering signal, be connected with analog converter 4；3rd resistor RA24 input is as
Second amplified signal input of one Anti-aliasing Filter Circuits, the second amplified signal output end (6 pin) with isolating amplifier circuit
It is connected, the second output end of the 3rd resistor RA24 other end as filtering signal, is connected with analog converter 4.Second resistance
RA13 output end is grounded through the first electric capacity CA1, and 3rd resistor RA24 output end is grounded through the 3rd electric capacity CA3, in the second electricity
Hinder and be connected with the second electric capacity CA2 between RA13 output end and 3rd resistor RA24 output end.
Being galvanically isolated sampling module 3 includes current sensor U1, current sampling resistor RBS and the second anti-aliasing filter electricity
Road, current sensor U1 is used for the size for measuring electric current on electric current line, and exports analog current signal, and analog signal is through overcurrent
Output is to the second Anti-aliasing Filter Circuits after sampling resistor RBS carries out signal conversion, after the filtering of the second Anti-aliasing Filter Circuits
Export to analog-digital converter 4.The current sensor of the present embodiment uses model TEC300C15-T1 current sensor U1.Electricity
Flow sensor U1 1 pin connection+12V power supplys, 2 pin connection -12V power supplys, 3 pin are current signal output pin, resist with second and mix
Folded filter circuit is connected, and 4 pin are hanging.Be galvanically isolated sampling module 3 the second Anti-aliasing Filter Circuits include the 4th resistance RB2,
5th resistance RB3 and the 4th electric capacity CB1, the 5th electric capacity CB2 and the 6th electric capacity CB3.Current sensor U1 output end (3 pin) with
Current sampling resistor RBS is connected, and the current sampling resistor RBS other end is grounded and is connected simultaneously with the 5th resistance RB3, the 5th electricity
The resistance RB3 other end is connected with analog-digital converter 4, and the 5th resistance RB3 other end is grounded after the 5th electric capacity CB2 simultaneously.Electricity
Flow sensor U1 output end (3 pin) is also connected through the 4th resistance RB2 with analog-digital converter 4, and the 4th resistance RB2 other end is same
It is grounded after the electric capacity CB1 of Shi Jing tetra-.Is connected between the 4th resistance RB2 output end and the 5th resistance RB3 output end
Six electric capacity CB3.
The analog-digital converter 4 of the present embodiment is using model ADS1147 modulus conversion chip U5, the modulus conversion chip
For high accuracy, the analog-digital converter of low biasing, the positive pole of modulus conversion chip U5 1 pin connection digital power, 2 pin, the connection of 3 pin
Digitally, 4 pin connection reset signal, 5 pin, 6 pin are hanging, and 7 pin are through the 7th capacity earth, 8 pin ground connection, 9 pin, 10 pin respectively with electricity
First, second output end of the first Anti-aliasing Filter Circuits is connected in pressure signal isolation module 2, receiving voltage analog signalses,
11 pin, 12 pin are connected with being galvanically isolated the current signal output end of sampling module 3 respectively, reception current-mode analog quantity signal, 13 pin,
14 pin connect analog power, and 15~20 pin are connected with controller 5, receive control and the high-precision numeral of output of controller 5
Signal is to controller 5.
The voltage sample module of electric energy meter of the present invention connects analog-digital converter by voltage signal isolation module, gathers direct current
Voltage analog data are subjected to electrical isolation by voltage signal isolation module after voltage signal and are sent to analog-digital converter；
It is galvanically isolated sampling module to be connected with analog-digital converter, DC current signal is gathered on the basis of electrical isolation and by current-mode
Analog quantity data are sent to analog-digital converter；Analog-digital converter is connected with controller, the voltage analog data and electricity that will be sampled
Flow field simulation amount data are converted to data signal and are sent to controller；Button and display module, for obtaining user instruction, display
The various data such as electricity, voltage, electric current, power, parameters of electric energy meter.The signal that Fig. 3 show the direct current energy meter of the present invention is adopted
Sample flow chart, electric energy meter carry out signal sampling the step of it is as follows：
Direct current energy meter gathers external dc voltage by voltage sample module；
Direct current energy meter gathers external dc electric current by current sample module；
Analog-digital converter obtains the voltage analog data and current-mode analog quantity data of sampling；
Voltage analog data and current-mode analog quantity data are converted to voltage digital amount data and electric current by analog-digital converter
Digital data is simultaneously exported to controller.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although with reference to above-described embodiment pair
The present invention is described in detail, it should be understood by a person of ordinary skill in the art that still can be to the specific of the present invention
Embodiment is modified or equivalent substitution, and without departing from any modification of spirit and scope of the invention or equivalent substitution,
It all should cover within the scope of the invention.
Claims (9)
1. direct current energy meter, it is characterised in that including：
Voltage sample module；
The voltage signal isolation module being connected with the voltage sample module；
The analog-digital converter being connected with the voltage signal isolation module；
Sampling module is galvanically isolated with what the analog-digital converter was connected；
The controller being connected with the analog-digital converter, the controller are connected with button and display module；
The voltage sample module is described by being sent to after the voltage signal isolation module by the d. c. voltage signal of collection
Analog-digital converter, the sampling module that is galvanically isolated gather DC current signal on the basis of electrical isolation and are sent to described
Analog-digital converter, the analog-digital converter transmit after voltage analog data and current-mode analog quantity data are converted into data signal
To the controller.
2. direct current energy meter as claimed in claim 1, it is characterised in that：The voltage sample module is by multiple divider resistance strings
Connection is formed, and the voltage sample input for divider resistance of connecting is connected with the anode of d. c. voltage signal, the electricity for divider resistance of connecting
Pressure sampled output is connected with the first voltage signal input part of voltage signal isolation module, the voltage sample for divider resistance of connecting
Output end is grounded through first resistor simultaneously, the earth terminal of the first resistor be connected with the negative terminal of d. c. voltage signal and with electricity
The second voltage signal input part of pressure signal isolation module is connected.
3. direct current energy meter as claimed in claim 1, it is characterised in that：The voltage signal isolation module includes isolation and amplified
Circuit and the first Anti-aliasing Filter Circuits being connected with the isolating amplifier circuit, wherein, isolating amplifier circuit and the electricity
Pressure sampling module is connected, and the first Anti-aliasing Filter Circuits are connected with the analog-digital converter.
4. direct current energy meter as claimed in claim 4, it is characterised in that：The isolating amplifier circuit is that model is AMC1200
Isolated amplifier, 1 pin of the isolated amplifier is connected with insulating power supply positive pole, 2 pin and the positive output of voltage sample module
End be connected, 3 pin are connected with the negative output terminal of voltage sample module, 4 pin with connecing insulating power supply, 5 pin with connecing internal electric source, 6 pin and 7
Pin is connected with the first Anti-aliasing Filter Circuits respectively, and 8 pin are connected with internal electric source positive pole.
5. the direct current energy meter as described in claim 4 or 5, it is characterised in that：First Anti-aliasing Filter Circuits include the
One electric capacity, the second electric capacity, the 3rd electric capacity second resistance and 3rd resistor；Wherein, one end of the second resistance is with isolating amplification
First amplified signal output end of circuit is connected, the other end is connected with the analog converter and connect simultaneously through first electric capacity
Ground；One end of the 3rd resistor is connected with the second amplified signal output end of isolating amplifier circuit, the other end and the simulation
Converter is connected and simultaneously through the 3rd capacity earth, second capacitance connection is in the output end of second resistance and the 3rd electricity
Between the output end of resistance.
6. direct current energy meter as claimed in claim 1, it is characterised in that：The sampling module that is galvanically isolated includes current sense
Device, current sampling resistor and the second Anti-aliasing Filter Circuits；The size of electric current on the current sensor measurement electric current line, and it is defeated
Go out analog current signal, analog signal is exported to the described second anti-aliasing filter after the current sampling resistor carries out signal conversion
Wave circuit, exported after being filtered by second Anti-aliasing Filter Circuits to the analog-digital converter.
7. direct current energy meter as claimed in claim 6, it is characterised in that：The current sensor uses model
TEC300C15-T1 current sensor, 1 pin connection+12V power supplys of current sensor, 2 pin connection -12V power supplys, 3 pin and
Two Anti-aliasing Filter Circuits are connected, and 4 pin are hanging.
8. direct current energy meter as claimed in claims 6 or 7, it is characterised in that：Second Anti-aliasing Filter Circuits include the
Four resistance, the 5th resistance, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, an output end and the electric current of the current sensor are adopted
Sample resistance is connected, and the other end of current sampling resistor is grounded and is connected simultaneously with the 5th resistance, the other end and mould of the 5th resistance
Number converter is connected and is grounded simultaneously after the 5th electric capacity；The output end of the current sensor is also through the 4th resistance and mould
Number converter is connected, and the other end of the 4th resistance is grounded after the 4th electric capacity simultaneously, and the 6th capacitance connection is the 4th
Between the output end of resistance and the output end of the 5th resistance.
9. direct current energy meter as claimed in claim 1, it is characterised in that：The analog-digital converter uses model ADS1147
Modulus conversion chip, modulus conversion chip 1 pin connection digital power positive pole, 2 pin, 3 pin connection digitally, 4 pin connection
Reset signal, 5 pin, 6 pin are hanging, and 7 pin are through the 7th capacity earth, 8 pin ground connection, 9 pin, 10 pin respectively with voltage signal isolation module
Output end be connected, 11 pin, 12 pin are connected with being galvanically isolated the output end of sampling module respectively, 13 pin, 14 pin connection simulation electricity
Source, 15~20 pin are connected with controller, receive controller control and output digit signals to controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445423.8A CN107422182A (en) | 2017-06-14 | 2017-06-14 | Direct current energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445423.8A CN107422182A (en) | 2017-06-14 | 2017-06-14 | Direct current energy meter |
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| Publication Number | Publication Date |
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| CN107422182A true CN107422182A (en) | 2017-12-01 |
Family
ID=60428828
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710445423.8A Withdrawn CN107422182A (en) | 2017-06-14 | 2017-06-14 | Direct current energy meter |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907698A (en) * | 2019-11-22 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Electric energy metering device for direct current distribution network |
| CN111856133A (en) * | 2020-06-12 | 2020-10-30 | 中国电力科学研究院有限公司 | Electric energy metering device and metering method suitable for direct current large current |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564959A (en) * | 2012-01-09 | 2012-07-11 | 武汉理工大学 | Device for detecting combustion flue gas amount of combustible material |
| CN202794334U (en) * | 2012-09-21 | 2013-03-13 | 郑州三晖电气股份有限公司 | Wide-range direct current standard electric energy meter |
| CN103018551A (en) * | 2012-12-13 | 2013-04-03 | 青岛乾程电子科技有限公司 | Single-phase intelligent electric energy meter with ZigBee communication module |
| CN202870145U (en) * | 2012-08-28 | 2013-04-10 | 长沙威胜信息技术有限公司 | DC simulation signal acquisition circuit for public transformation terminal |
| CN203037732U (en) * | 2012-12-28 | 2013-07-03 | 深圳市思达仪表有限公司 | Isolation-type direct-current electric energy meter |
| CN103529422A (en) * | 2013-10-12 | 2014-01-22 | 南京欧格节能科技有限公司 | Direct current electric energy meter detection device |
| CN203519723U (en) * | 2013-10-23 | 2014-04-02 | 威胜集团有限公司 | Wide range DC electric energy meter |
| CN203745412U (en) * | 2014-03-31 | 2014-07-30 | 西门子（中国）有限公司 | Corrosive gas detection sensor of circuit board |
| CN204105948U (en) * | 2014-06-25 | 2015-01-21 | 深圳市理邦精密仪器股份有限公司 | A kind of measurement of bldy temperature circuit |
| CN204884068U (en) * | 2015-08-24 | 2015-12-16 | 北华大学 | Monitored control system is used in dull -witted old man's nursing |
| CN105548656A (en) * | 2015-12-04 | 2016-05-04 | 珠海万力达电气自动化有限公司 | Direct current high voltage isolation sampling circuit |
| CN106370924A (en) * | 2016-09-18 | 2017-02-01 | 惠州市蓝微新源技术有限公司 | High-voltage signal acquisition and protection circuit |
| CN205921579U (en) * | 2016-08-25 | 2017-02-01 | 威胜集团有限公司 | Metering device who keeps apart sampling circuit and make with this circuit |
| CN106451772A (en) * | 2016-10-08 | 2017-02-22 | 广州供电局有限公司 | Direct voltage acquisition apparatus |
| CN106645905A (en) * | 2016-11-11 | 2017-05-10 | 大禹电气科技股份有限公司 | Output voltage isolation sampling circuit of high-voltage inverter |
| CN207181522U (en) * | 2017-06-14 | 2018-04-03 | 珠海中慧微电子股份有限公司 | Novel DC electric energy meter |
-
2017
- 2017-06-14 CN CN201710445423.8A patent/CN107422182A/en not_active Withdrawn
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564959A (en) * | 2012-01-09 | 2012-07-11 | 武汉理工大学 | Device for detecting combustion flue gas amount of combustible material |
| CN202870145U (en) * | 2012-08-28 | 2013-04-10 | 长沙威胜信息技术有限公司 | DC simulation signal acquisition circuit for public transformation terminal |
| CN202794334U (en) * | 2012-09-21 | 2013-03-13 | 郑州三晖电气股份有限公司 | Wide-range direct current standard electric energy meter |
| CN103018551A (en) * | 2012-12-13 | 2013-04-03 | 青岛乾程电子科技有限公司 | Single-phase intelligent electric energy meter with ZigBee communication module |
| CN203037732U (en) * | 2012-12-28 | 2013-07-03 | 深圳市思达仪表有限公司 | Isolation-type direct-current electric energy meter |
| CN103529422A (en) * | 2013-10-12 | 2014-01-22 | 南京欧格节能科技有限公司 | Direct current electric energy meter detection device |
| CN203519723U (en) * | 2013-10-23 | 2014-04-02 | 威胜集团有限公司 | Wide range DC electric energy meter |
| CN203745412U (en) * | 2014-03-31 | 2014-07-30 | 西门子（中国）有限公司 | Corrosive gas detection sensor of circuit board |
| CN204105948U (en) * | 2014-06-25 | 2015-01-21 | 深圳市理邦精密仪器股份有限公司 | A kind of measurement of bldy temperature circuit |
| CN204884068U (en) * | 2015-08-24 | 2015-12-16 | 北华大学 | Monitored control system is used in dull -witted old man's nursing |
| CN105548656A (en) * | 2015-12-04 | 2016-05-04 | 珠海万力达电气自动化有限公司 | Direct current high voltage isolation sampling circuit |
| CN205921579U (en) * | 2016-08-25 | 2017-02-01 | 威胜集团有限公司 | Metering device who keeps apart sampling circuit and make with this circuit |
| CN106370924A (en) * | 2016-09-18 | 2017-02-01 | 惠州市蓝微新源技术有限公司 | High-voltage signal acquisition and protection circuit |
| CN106451772A (en) * | 2016-10-08 | 2017-02-22 | 广州供电局有限公司 | Direct voltage acquisition apparatus |
| CN106645905A (en) * | 2016-11-11 | 2017-05-10 | 大禹电气科技股份有限公司 | Output voltage isolation sampling circuit of high-voltage inverter |
| CN207181522U (en) * | 2017-06-14 | 2018-04-03 | 珠海中慧微电子股份有限公司 | Novel DC electric energy meter |
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| CN110907698A (en) * | 2019-11-22 | 2020-03-24 | 国网浙江省电力有限公司电力科学研究院 | Electric energy metering device for direct current distribution network |
| CN110907698B (en) * | 2019-11-22 | 2021-11-09 | 国网浙江省电力有限公司营销服务中心 | Electric energy metering device for direct current distribution network |
| CN111856133A (en) * | 2020-06-12 | 2020-10-30 | 中国电力科学研究院有限公司 | Electric energy metering device and metering method suitable for direct current large current |
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