CN205450100U - High -voltage board three -phase AC voltage measuring device - Google Patents
High -voltage board three -phase AC voltage measuring device Download PDFInfo
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- CN205450100U CN205450100U CN201620242731.1U CN201620242731U CN205450100U CN 205450100 U CN205450100 U CN 205450100U CN 201620242731 U CN201620242731 U CN 201620242731U CN 205450100 U CN205450100 U CN 205450100U
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Abstract
The utility model relates to a high -voltage board three -phase AC voltage measuring device, characterized by: three -phase AC voltage signal sampling unit's three routes output is connected in A looks, B looks, C phase voltage transform processing unit's input electricity respectively, a looks, B looks, C phase voltage transform processing unit's output is connected with 3 way analog switch's 3 way inputs electricity respectively, 3 way analog switch's output is connected with mould / number signal converting unit's input electricity, mould / number signal converting unit's output is connected with the IO mouth of central processing unit unit electricity, the control mouth of central processing unit unit is connected with 3 way analog switch, mould / number signal converting unit's control end electricity, the central processing unit unit is connected through IO mouth and data display unit, data converting unit electricity respectively, the filtering unit is connected with central processing unit unit and data display unit's power port respectively, data communication unit and 485 electrical connection interface. It provides the bottom database for the big data processing of network cloud end.
Description
Technical field
This utility model relates to electronic signal detection field, particularly relates to a kind of high-voltage board three-phase alternating current pressure measuring device.
Background technology
High-voltage board voltage signal is the important indicator of reflection power system power supply quality, the allowed band of voltage signal offrating, the technical and economic requirements of electrical equipment will be affected, even cause electrical equipment cisco unity malfunction. therefore, voltage parameter must be measured, monitoring, to carry power supply level, meet the needs of electric power development. along with the trend of Automation of Electric Systems development, in high-voltage board dispatch control system, with microcomputer dress, voltage parameter is measured, monitoring, and by communication network, voltage parameter is delivered to central control room, not only put forward the precision measured, and put forward the automatization level of switch board.
At present, the design of many research institutions have developed the monitoring dress of some three-phase alternating currents. but these devices are to use multiway analog switch to share an A/D converter mostly, not only circuit is complicated, price, but also the error that the impact being difficult to avoid that between aperture time of sampling and device causes;The functions such as the measurement to alternating voltage is the most also to use synchronized sampling measurement method, adds iterations and data firefly, easily makes single-chip microcomputer not have enough time to complete sampling, communication；Additionally these device data communications use local communication and display mostly, data-interface is few, it is difficult to extension, data standard disunity, cannot be carried out data network conveying, more can not carry out data communication network process, thus cause the measurement result of these devices can not process for the big data in network high in the clouds and bottom data is provided.
Summary of the invention
The purpose of this utility model is to provide a kind of high-voltage board three-phase alternating current pressure measuring device, in order to solves the digitized of high-voltage board voltage analog DATA REASONING, networking, processes for the big data in network high in the clouds and provide bottom master data.
The purpose of this utility model is realized in, a kind of high-voltage board three-phase alternating current pressure measuring device, is characterized in that: at least include: three-phase alternating voltage signal sampling unit, A phase voltage conversion process unit, B phase voltage conversion process unit, C phase voltage conversion process unit, 3 path analoging switch, analog signal conversion unit, central processor unit, Date Conversion Unit, filter unit, data display unit, data communication unit and 485 data interface unit；No. three outfans of three-phase alternating voltage signal sampling unit electrically connect respectively at the input of A phase voltage conversion process unit, B phase voltage conversion process unit, C phase voltage conversion process unit；A phase voltage conversion process unit, B phase voltage conversion process unit, the outfan of C phase voltage conversion process unit electrically connect with 3 road inputs of 3 path analoging switch respectively；The outfan of 3 path analoging switch electrically connects with the input of analog signal conversion unit；The outfan of analog signal conversion unit electrically connects with the I/O mouth of central processor unit；The control end controlling mouth and 3 path analoging switch, analog signal conversion unit of central processor unit electrically connects；Central processor unit is electrically connected with data display unit, Date Conversion Unit by I/O mouth respectively；Filter unit power port with central processor unit and data display unit respectively is connected；Date Conversion Unit outfan electrically connects with data communication unit input；Data communication unit and the electrical connection of 485 interfaces.
Described three-phase alternating voltage signal sampling unit, it is made up of 3 road voltage sample sensors and divider resistance, the purpose of ac voltage signal sampling module is by ac voltage signal that voltage signal between every for input two is 0 ~ 380V by voltage sample sensor by the size detection of voltage between phases signal out, and phase insulation transmission line of electricity is transported to individual event voltage transformation module and processes.
Described A phase voltage conversion process unit, is made up of two component piezoresistances and RMS conversion device.
Described B phase voltage conversion process unit, is made up of two component piezoresistances and RMS conversion device.
Described C phase voltage conversion process unit, is made up of two component piezoresistances and RMS conversion device.
Described 3 path analoging switch, use dual power supply, and wherein forward supply voltage is+9V, and negative sense supply voltage is-5V.
Described analog signal conversion unit uses 24 A/D conversion chip ADS1110 of AD company.
Described central processor unit is single-chip microcomputer and minimum system thereof, and Single Chip Microcomputer (SCM) system uses the STC15W408AS that STC Corporation produces.
Described data display unit is made up of 48 Digital sum pipes and driving chip, and driving chip model is MAX7219.
Described data communication unit uses RS485 communications protocol to carry out communication.
The utility model has the advantages that: by the high precision test to high-voltage board three-phase alternating voltage, i.e. voltage signal between the three phase line phase road in a high-voltage board is detected, and be digitized processing by the analog voltage signal detected, the current signal data after then processing carry out big data-optimized process by data network transmission to high in the clouds.Solve the digitized that high-voltage board analog data is measured, networking.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the utility model is described in further detail:
Fig. 1 is this utility model embodiment circuit theory diagrams；
In figure, 1, three-phase alternating voltage signal sampling unit；2, A phase voltage conversion process unit；3, B phase voltage conversion process unit；4, C phase voltage conversion process unit；5,3 path analoging switch；6, analog signal conversion unit；7, central processor unit；8, Date Conversion Unit；9, filter unit, 10, data display unit, 11, data communication unit, 12,485 data interface unit.
Detailed description of the invention
As shown in Figure 1, a kind of high-voltage board high accuracy multichannel AC current sensing means, at least include: a kind of high-voltage board three-phase alternating current pressure measuring device, it is characterized in that: at least include: three-phase alternating voltage signal sampling unit 1, A phase voltage conversion process unit 2, B phase voltage conversion process unit 3, C phase voltage conversion process unit 4,3 path analoging switch 5, analog signal conversion unit 6, central processor unit 7, Date Conversion Unit 8, filter unit 9, data display unit 10, data communication unit 11 and 485 data interface unit 12；No. three outfans of three-phase alternating voltage signal sampling unit 1 electrically connect respectively at the input of A phase voltage conversion process unit 2, B phase voltage conversion process unit 3, C phase voltage conversion process unit 4；A phase voltage conversion process unit 2, B phase voltage conversion process unit 3, the outfan of C phase voltage conversion process unit 4 electrically connect with 3 road inputs of 3 path analoging switch 5 respectively；The outfan of 3 path analoging switch 5 electrically connects with the input of analog signal conversion unit 6；The outfan of analog signal conversion unit 6 electrically connects with the I/O mouth of central processor unit 7；The control end controlling mouth and 3 path analoging switch 5, analog signal conversion unit 6 of central processor unit 7 electrically connects；Central processor unit 7 is electrically connected with data display unit 10, Date Conversion Unit 8 by I/O mouth respectively；Filter unit 9 power port with central processor unit 7 and data display unit 10 respectively is connected；Date Conversion Unit 8 outfan electrically connects with data communication unit 11 input；Data communication unit 11 electrically connects with 485 interfaces.
Described three-phase alternating voltage signal sampling unit, it is made up of 3 road voltage sample sensors and divider resistance, the purpose of ac voltage signal sampling module is by ac voltage signal that voltage signal between every for input two is 0 ~ 380V by voltage sample sensor by the size detection of voltage between phases signal out, and phase insulation transmission line of electricity is transported to individual event voltage transformation module and processes.
nullDescribed A phase voltage conversion process unit，It is made up of two component piezoresistances and RMS conversion device，The ac voltage signal that voltage to be measured is 0 ~ 380V carried to A phase voltage conversion process unit due to three-phase alternating voltage signal sampling unit,This analog AC voltage signal is carried out subsequent treatment，AC signal must be had to be converted to direct current signal，And carry out analog digital conversion，It is converted to digital signal by analogue signal，The effect of RMS conversion device is the d. c. voltage signal that the ac voltage signal of 0 ~ 2V is converted to 0 ~ 2V，In transformation process, the absolute value of voltage signal keeps constant，Owing to ac voltage signal to be measured is 0 ~ 380V，This utility model uses two groups of high accuracy divider resistances the ac voltage signal of 0 ~ 380V is converted to the ac voltage signal of 0 ~ 2V by a certain percentage and is transported to RMS conversion device，Then by RMS conversion device, the ac voltage signal of 0 ~ 2V is converted into the d. c. voltage signal of 0 ~ 2V，Then by its subsequent treatment.
nullDescribed B phase voltage conversion process unit，It is made up of two component piezoresistances and RMS conversion device，The ac voltage signal that voltage to be measured is 0 ~ 380V carried to A phase voltage conversion process unit due to three-phase alternating voltage signal sampling unit,This analog AC voltage signal is carried out subsequent treatment，AC signal must be had to be converted to direct current signal，And carry out analog digital conversion，It is converted to digital signal by analogue signal，The effect of RMS conversion device is the d. c. voltage signal that the ac voltage signal of 0 ~ 2V is converted to 0 ~ 2V，In transformation process, the absolute value of voltage signal keeps constant，Owing to ac voltage signal to be measured is 0 ~ 380V，This utility model uses two groups of high accuracy divider resistances the ac voltage signal of 0 ~ 380V is converted to the ac voltage signal of 0 ~ 2V by a certain percentage and is transported to RMS conversion device，Then by RMS conversion device, the ac voltage signal of 0 ~ 2V is converted into the d. c. voltage signal of 0 ~ 2V，Then carried out subsequent treatment.
nullDescribed C phase voltage conversion process unit，It is made up of two component piezoresistances and RMS conversion device，The ac voltage signal that voltage to be measured is 0 ~ 380V carried to A phase voltage conversion process unit due to three-phase alternating voltage signal sampling unit,This analog AC voltage signal is carried out subsequent treatment，AC signal must be had to be converted to direct current signal，And carry out analog digital conversion，It is converted to digital signal by analogue signal，The effect of RMS conversion device is the d. c. voltage signal that the ac voltage signal of 0 ~ 2V is converted to 0 ~ 2V，In transformation process, the absolute value of voltage signal keeps constant，Owing to ac voltage signal to be measured is 0 ~ 380V，This utility model uses two groups of high accuracy divider resistances the ac voltage signal of 0 ~ 380V is converted to the ac voltage signal of 0 ~ 2V by a certain percentage and is transported to RMS conversion device，Then by RMS conversion device, the ac voltage signal of 0 ~ 2V is converted into the d. c. voltage signal of 0 ~ 2V，Then carried out subsequent treatment.
Described 3 path analoging switch, use dual power supply, wherein forward supply voltage is+9V, negative sense supply voltage is-5V, analog switch 3 pin output pin with A, B, C three-phase voltage conversion process unit respectively is connected, and the pin that controls of analog switch is connected with an I/O interface of central processor unit 7, when 3 path analoging switch work, sent switching value by an I/O interface of central processor unit 7, determined the on/off of analoging switch output end mouth by the structural circuit within analog switch.
Described analog signal conversion unit, uses 24 A/D conversion chip ADS1110 of AD company, is characterized in that conversion accuracy is high, and up to 24, operating power consumption is low, and circuit design is simple.The input pin of analog signal conversion unit is connected with the output pin of RMS conversion device, voltage signal to be measured enters analog signal conversion unit 6 after RMS conversion device is changed, and through entering analog signal conversion unit, voltage to be measured is converted to digital signal by analogue signal, process for central processor unit 7.The control signal of analog signal conversion unit is sent by central processor unit 7.
Described central processor unit 7 is single-chip microcomputer and minimum system thereof, and Single Chip Microcomputer (SCM) system uses the STC15W408AS that STC Corporation produces, and the feature of this Single Chip Microcomputer (SCM) system is wide operating voltage, running voltage width up to 2.6V-5.5V, reliability is high, and encryption performance is strong.Single Chip Microcomputer (SCM) system and 8 path analoging switch unit, analog signal conversion unit, data display unit, data communication unit is connected, and controls the duty of unit module respectively.
Described Date Conversion Unit is the data model that data model Single Chip Microcomputer (SCM) system sent is converted to required for data communication system, the data signal sent due to Single Chip Microcomputer (SCM) system is Transistor-Transistor Logic level, and the data signal required for data communication system is 232 level, therefore need at this to set up data conversion system, the data signal of Transistor-Transistor Logic level is converted to the data signal of 232 multilevel type.
Described filter unit, its effect is for Single Chip Microcomputer (SCM) system, the electric power system of data communication system is filtered processing, when being operated due to Single Chip Microcomputer (SCM) system and data communication system, its operating frequency is high, and the requirement to electric power system is also the highest, and once power-supply system clutter increases, easily cause the interference to the two system, affect it and normally work.Therefore this utility model is designed with special filtering system, solves, with this, the problem that electric power system noise jamming is big.
Described data display unit, is made up of 48 Digital sum pipes and driving chip, and driving chip model is MAX7219.
Described data communication unit uses RS485 communications protocol to carry out communication, and single-chip microcomputer sends communication data and is sent to data communication link through 485 driving chip after Date Conversion Unit carries out level.
The work process of this device is: sampled by high-voltage board three-phase alternating voltage by No. 3 voltage transformers, under Single-chip Controlling, inputted one by one by 3 path analoging switch timesharing, the d. c. voltage signal of 0-200mV it is converted into through high accuracy real effective device, Single Chip Microcomputer (SCM) system is sent into by after 24 high-precision AD converter conversion, (its measurement scope is 0-380V to be calculated the virtual value of the tested voltage of high-voltage board three-phase through single-chip microcomputer, precision is up to one thousandth), and high in the clouds can be sent to by 485 interfaces and carry out big data summarization and process.
Parts that the present embodiment describes the most in detail and structure belong to the well-known components of the industry and common structure or conventional means, describe the most one by one.
Claims (10)
1. a high-voltage board three-phase alternating current pressure measuring device, is characterized in that: at least include: three-phase alternating voltage signal sampling unit, A phase voltage conversion process unit, B phase voltage conversion process unit, C phase voltage conversion process unit, 3 path analoging switch, analog signal conversion unit, central processor unit, Date Conversion Unit, filter unit, data display unit, data communication unit and 485 data interface unit；No. three outfans of three-phase alternating voltage signal sampling unit electrically connect respectively at the input of A phase voltage conversion process unit, B phase voltage conversion process unit, C phase voltage conversion process unit；A phase voltage conversion process unit, B phase voltage conversion process unit, the outfan of C phase voltage conversion process unit electrically connect with 3 road inputs of 3 path analoging switch respectively；The outfan of 3 path analoging switch electrically connects with the input of analog signal conversion unit；The outfan of analog signal conversion unit electrically connects with the I/O mouth of central processor unit；The control end controlling mouth and 3 path analoging switch, analog signal conversion unit of central processor unit electrically connects；Central processor unit is electrically connected with data display unit, Date Conversion Unit by I/O mouth respectively；Filter unit power port with central processor unit and data display unit respectively is connected；Date Conversion Unit outfan electrically connects with data communication unit input；Data communication unit and the electrical connection of 485 interfaces.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, it is characterized in that: described three-phase alternating voltage signal sampling unit, it is made up of 3 road voltage sample sensors and divider resistance, the purpose of ac voltage signal sampling module is by ac voltage signal that voltage signal between every for input two is 0 ~ 380V by voltage sample sensor by the size detection of voltage between phases signal out, and phase insulation transmission line of electricity is transported to individual event voltage transformation module and processes.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described A phase voltage conversion process unit, is made up of two component piezoresistances and RMS conversion device.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described B phase voltage conversion process unit, is made up of two component piezoresistances and RMS conversion device.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described C phase voltage conversion process unit, is made up of two component piezoresistances and RMS conversion device.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described 3 path analoging switch, using dual power supply, wherein forward supply voltage is+9V, and negative sense supply voltage is-5V.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described analog signal conversion unit uses 24 A/D conversion chip ADS1110 of AD company.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described central processor unit is single-chip microcomputer and minimum system thereof, Single Chip Microcomputer (SCM) system uses the STC15W408AS that STC Corporation produces.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described data display unit is made up of 48 Digital sum pipes and driving chip, and driving chip model is MAX7219.
A kind of high-voltage board three-phase alternating current pressure measuring device the most according to claim 1, is characterized in that: described data communication unit uses RS485 communications protocol to carry out communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620242731.1U CN205450100U (en) | 2016-03-28 | 2016-03-28 | High -voltage board three -phase AC voltage measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620242731.1U CN205450100U (en) | 2016-03-28 | 2016-03-28 | High -voltage board three -phase AC voltage measuring device |
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| CN205450100U true CN205450100U (en) | 2016-08-10 |
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| CN201620242731.1U Active CN205450100U (en) | 2016-03-28 | 2016-03-28 | High -voltage board three -phase AC voltage measuring device |
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