CN203798904U - Isolated single-phase energy consumption measurement and control circuit - Google Patents
Isolated single-phase energy consumption measurement and control circuit Download PDFInfo
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- CN203798904U CN203798904U CN201420177452.2U CN201420177452U CN203798904U CN 203798904 U CN203798904 U CN 203798904U CN 201420177452 U CN201420177452 U CN 201420177452U CN 203798904 U CN203798904 U CN 203798904U
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 22
- 238000005259 measurement Methods 0.000 title abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 23
- 238000002955 isolation Methods 0.000 claims description 32
- 238000012544 monitoring process Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000005693 optoelectronics Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 9
- 238000004891 communication Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model relates to the field of power energy consumption metering, and especially relates to an isolated single-phase energy consumption measurement and control circuit comprising a voltage sensor, a current sensor, a digital signal processing assembly, an optoelectronic isolator, a relay assembly, an isolated AC-DC module and an isolated DC-DC module. The isolated single-phase energy consumption measurement and control circuit of the utility model has the following advantages that the utility model provides an isolated electrical equipment energy consumption measurement and control circuit based on the digital signal processing technology which has the control function and has advantages of easy utilization, convenient installation, safety, reliability and real-time monitoring, the circuit is integrated into a measurement and control device, and then the measurement and control device is installed between electric equipment and the power socket, so not only effective monitoring can be conveniently performed on equipment energy consumption, and but also necessary control can be performed on the equipment; moreover, the circuit has advantages of low cost, less power line influences, many monitoring parameters, simple interface and good adaptability, and a good solution is provided for electrical equipment energy consumption monitoring.
Description
Technical field
The utility model relates to electric power energy consumption measure field, relates in particular to delimitation order phase energy consumption telemetry circuit.
Background technology
Existing single-phase electric meter is generally used for metering electricity, and still, along with the development of the industrialization of the country, urbanization, the problem that energy shortage and the equipment management of power use fall behind cannot satisfy the demands the ammeter only with measurement power consumption.
Electronic electric energy meter adopts inductive sensors if voltage transformer (VT) summation current transformer is as sensing element conventionally, and therefore this ammeter has perception impact to supply line, and to adopting the communication signal of the equipment of power line carrier technology communication to have attenuation; In addition, there is a large amount of interference in power supply grid, the measuring accuracy of ammeter is impacted conventionally, causes measuring accuracy not high.These shortcomings all cause the wasting of resources, metering is inaccurate and the problem of bad adaptability.
In order better equipment electric energy consumption to be monitored, thereby electricity consumption is effectively managed to equipment, needs a kind of transmitting module or device that is exclusively used in the whole parameters of monitoring consumer electricity consumption.In addition existing electric-power metering instrument does not have the function of control conventionally as switchgear function, cannot to equipment, suitably control where necessary.
Deficiency in above-mentioned application, in Practical Project realization, also there are the following problems:
1) the relevant measure and control device of common electric energy meter or electric energy is all realized measurement module, display module, control module by an assembly, and cause, circuit is complicated, development and testing is difficult;
2) be exclusively used in the module of electric energy measurement and control still rare, only several modules are also used direct supply conventionally, and lack control function.
3) owing to relating to dangerous voltage (power voltage line), external control circuit must be isolated with line of electric force.A kind of method is directly to use line of electric force to power to metering circuit through the simple capacitance partial pressure direct supply that voltage stabilizing obtains again, and process photoelectrical coupler is as the interface of same external control circuit.Problem is due to not isolation, the power supply that said method obtains can be directly the interference and coupling on line of electric force to metering circuit (connecting by power supply), affect measuring accuracy; In addition this kind of power is limited, and directly with line of electric force coupling thereby dangerous, therefore discomfort is combined into necessary control element provides power supply again.
Utility model content
The utility model is to overcome above-mentioned weak point, and object is to provide delimitation order phase energy consumption telemetry circuit, and this circuit can combine with control system, to a complete set of parameter high-acruracy survey of device for electric, and cuts off where necessary or open consumer power supply; Also can form together low cost, high-precision power measuring instrument or transmitter with MCU system.By using dual resisteance, guaranteed safe and reliable and integrated simple.Because this circuit provides observing and controlling function, electric energy measurement and control instrument developer only need to enter to complete a reliable and high power measuring instrument of precision this circuit is integrated; And for measure and control device developer, simple integrated circuit just makes measure and control device increase reliable and high-precision power energy monitoring and controlling function in equipment.
The utility model is to achieve the above object by the following technical programs: delimitation order phase energy consumption telemetry circuit, comprise: voltage sensor, current sensor, digital signal processing assembly, photoisolator, relay assembly, isolation AC-DC module and isolation DC-DC module, described voltage sensor, current sensor with by electric loading, be connected, voltage sensor, current sensor is connected with the signal input part of digital signal processing assembly, digital signal processing assembly is connected with outside TT&C system by photoisolator, input end and the live wire of isolation AC-DC module, zero line connects, the output terminal of isolation AC-DC module is connected with the input end of isolation DC-DC module, output terminal and the photoisolator of isolation DC-DC module, relay assembly, digital signal processing assembly connects, relay assembly input end also connects live wire, photoisolator, relay assembly output terminal is connected with current sensor.
As preferably, described voltage sensor is resistor type voltage sensor, and current sensor is resistor-type current sensor.
As preferably, the chip of described digital signal processing assembly is CS5490.
As preferably, described relay assembly is comprised of single-pole single-throw (SPST) electromagnetic relay and driving circuit thereof.
As preferably, described photoisolator adopts SFH610A-3 high speed photo coupling to be equipped with necessary current-limiting resistance and pull-up resistor forms.
The beneficial effects of the utility model are: the utility model provide a kind of isolated form based on Digital Signal Processing that uses simple, easy for installation, safe and reliable, immediately monitoring with the electrical equipment energy consumption telemetry circuit of controlling function, this circuit is integrated in measure and control device, then measure and control device is arranged between consumer and supply socket, not only can to equipment energy consumption, carry out effective monitoring easily, and can carry out necessary control to equipment; In addition, this circuit cost is cheap, little on power circuit impact, monitoring parameter is many, interface is simple, strong adaptability, the power consumption of the utility model circuit is no more than 1W, and measuring voltage scope is 90-260V power supply, load current range 0-15A, supply frequency 5-2000Hz, voltage effective value, current effective value, power effective value precision are all 0.1%, for electrical equipment energy consumption monitoring provides good solution thinking.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, the utility model is described further, but protection domain of the present utility model is not limited in this:
Embodiment 1: as shown in Figure 1, delimitation order phase energy consumption telemetry circuit, comprise: voltage sensor, current sensor, CS5490 digital signal processing assembly, photoisolator, relay assembly, isolation AC-DC module and isolation DC-DC module, described voltage sensor, current sensor with by electric loading, be connected, voltage sensor, current sensor is connected with the signal input part of digital signal processing assembly, digital signal processing assembly is connected with outside TT&C system by photoisolator, input end and the live wire of isolation AC-DC module, zero line connects, the output terminal of isolation AC-DC module is connected with the input end of isolation DC-DC module, output terminal and the photoisolator of isolation DC-DC module, relay assembly, digital signal processing assembly connects, relay assembly input end also connects live wire, photoisolator, relay assembly output terminal is connected with current sensor.
Digital signal processing assembly is comprised of CS5490 chip and peripheral cell thereof.CS5490 is the high precision for electric energy measurement based on Digital Signal Processing, the binary channels analog front-end chip of CIRRUS LOGIC company.Chip is with two 24 δ-Σ ADC and DSP hardware, adopt that digital signal technique quantizes, filtering input signal and calculate voltage, current effective value, frequency, active power, reactive power, applied power, power factor and energy consumption, and by result store to register in sheet.Chip provides UART to export these parameters.Chip can detect overvoltage, overcurrent condition.This chip can interface resistor-type, inductive sensor, operating voltage 3.3V, and power consumption is less than 13 milliwatts, and ℃-80 ℃, working temperature-40, can meet requirement of the present invention completely.In this enforcement, the 2 line UART of CS5490 are connected to external system after photoisolator isolation.
Described voltage sensor, current sensor are connected to by electric loading, delivering to the signal input pin of CS5490 after the single-phase voltage by electric loading and current signal conversion.Voltage sensor is actual is resitstance voltage divider, and the resistance of 4 the 422K resistance that adopts that precision is 1% and 1 1K, 1/10W, precision 1% forms, the input that is 260VAC for effective value after dividing potential drop, and output effective value is less than 176mV.Current sensor is the resistance in 2 bold and unconstrained Europe, and precision is 1%, and peak power is 2W, 15A electric current can be converted into 30mV.
Relay assembly is comprised of single-pole single-throw (SPST) electromagnetic relay and driving circuit thereof, and relay assembly one end connects current sensor, and one end is connected to live wire, can controlled connection device power supply (DPS).Relay assembly specification is 10A, 250VAC.
Isolation AC-DC module adopts the insulating power supply module that input range is 85-260V, and this module input is from 220V or 110V line of electric force, and output voltage is 12V DC voltage, and output power is 1W, and long-term short-circuit protection, overheated over-voltage protecting function are provided.Input is with protection ground, and input is with output, and input is with shell isolation voltage 1500VAC.
Isolation DC-DC module is input as the 12V DC voltage of isolation AC-DC output, is output as 5V, and output power is 1W.It has long-term short-circuit protection, overheated over-voltage protecting function, and its input is with output, and input is with shell isolation voltage 1500VAC.
Photoisolator adopts SFH610A-3 high speed photo coupling to be equipped with necessary current-limiting resistance and pull-up resistor forms, and supports the serial isolated data communication of 9600bps and above communication speed.Isolation voltage effective value is up to 5300V.
CS5490 digital signal processing assembly adopts 24 δ-Σ ADC input signal is quantized and use digital processing algorithm to carry out filtering, calculating to ADC result, obtains high-precision parameter measurements; By photoisolator, UART's UART of CS5490 digital signal processing assembly with outside TT&C system is connected; The switching signal of outside TT&C system is by pilot relay assembly after photoisolator; Isolation AC-DC module becomes DC voltage the AC voltage conversion on single-phase 110VAC or 220VAC electric network power line, and first order isolation is provided simultaneously; The input that the 12V direct current of isolation AC-DC module output is isolation DC-DC module, isolation DC-DC module is output as 5V direct current, and isolate DC-DC module provides second level isolation simultaneously; Isolate DC-DC module is digital signal processing assembly, photoisolator and relay assembly power supply simultaneously.
Above narration is specific embodiment of the utility model and the know-why used; if the change of doing according to conception of the present utility model; when its function producing does not exceed spiritual that instructions and accompanying drawing contain yet, must belong to protection domain of the present utility model.
Claims (4)
1. delimitation order phase energy consumption telemetry circuit, it is characterized in that comprising: voltage sensor, current sensor, digital signal processing assembly, photoisolator, relay assembly, isolation AC-DC module and isolation DC-DC module, described voltage sensor, current sensor with by electric loading, be connected, voltage sensor, current sensor is connected with the signal input part of digital signal processing assembly, digital signal processing assembly is connected with outside TT&C system by photoisolator, input end and the live wire of isolation AC-DC module, zero line connects, the output terminal of isolation AC-DC module is connected with the input end of isolation DC-DC module, output terminal and the photoisolator of isolation DC-DC module, relay assembly, digital signal processing assembly connects, relay assembly input end also connects live wire, photoisolator, relay assembly output terminal is connected with current sensor.
2. delimitation order phase energy consumption telemetry circuit according to claim 1, is characterized in that, described voltage sensor is resistor type voltage sensor, and current sensor is resistor-type current sensor.
3. delimitation order phase energy consumption telemetry circuit according to claim 1, is characterized in that, the chip of described digital signal processing assembly is CS5490.
4. delimitation order phase energy consumption telemetry circuit according to claim 1, is characterized in that, described relay assembly is comprised of single-pole single-throw (SPST) electromagnetic relay and driving circuit thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177452.2U CN203798904U (en) | 2014-04-14 | 2014-04-14 | Isolated single-phase energy consumption measurement and control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177452.2U CN203798904U (en) | 2014-04-14 | 2014-04-14 | Isolated single-phase energy consumption measurement and control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203798904U true CN203798904U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420177452.2U Expired - Lifetime CN203798904U (en) | 2014-04-14 | 2014-04-14 | Isolated single-phase energy consumption measurement and control circuit |
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| CN (1) | CN203798904U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917225A (en) * | 2021-09-28 | 2022-01-11 | 紫光展讯通信(惠州)有限公司 | Monitoring device of instrument |
-
2014
- 2014-04-14 CN CN201420177452.2U patent/CN203798904U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113917225A (en) * | 2021-09-28 | 2022-01-11 | 紫光展讯通信(惠州)有限公司 | Monitoring device of instrument |
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Granted publication date: 20140827 |