CN103235215A - Multi-functional instrument - Google Patents
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- CN103235215A CN103235215A CN2013101195021A CN201310119502A CN103235215A CN 103235215 A CN103235215 A CN 103235215A CN 2013101195021 A CN2013101195021 A CN 2013101195021A CN 201310119502 A CN201310119502 A CN 201310119502A CN 103235215 A CN103235215 A CN 103235215A
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Abstract
The invention discloses a multi-functional instrument, and belongs to the technical field of electrical power monitoring. The multi-functional instrument comprises a central processing module, an analog collecting module, a metering module, an LED (light-emitting diode) drive controlling module, a communication module, a switching value collecting circuit with isolating circuits, and a switching value output module. The analog collecting module is used for collecting current and voltage analog signals from a monitor terminal and outputting to the metering module, the metering module is used for generating current and voltage digital signals through analog-digital conversion and outputting to an input end of the central processing module, the central processing module outputs analytic result information to a calculating unit and a control unit, control triggered signals to the LED drive controlling module and differential signals to the communication module after analyzing electric power quality according to the current and voltage digital signals, the switching value collecting circuit converts the outer disconnecting and connecting state into high-level and low-level signals through optical coupling isolation and outputs to the central processing module, and pulse signals after being internally processed by the central processing module are outputted to the switching value output module. By the multi-functional instrument, timely data storage can be realized; and the functions of electrical measurement, energy accumulation, electric power quality analysis, remote control, telesignalisation and the like are integrated.
Description
Technical field
What the present invention relates to is a kind of device of electric power monitoring system technical field, specifically is a kind of multifunction instrument.
Background technology
Be mainly used in the power monitoring demand that automatization levels such as electric system, industrial and mining enterprises, petrochemical complex, Ferrous Metallurgy, communal facility, intelligent building have relatively high expectations designs owing to intelligent multifunctional.Therefore small error in dipping can produce considerable influence to electric energy tariffing, clearing, and is different different because of use occasion, part throttle characteristics, management mode etc. because of each department again.But its core is main control chip and metering circuit, and emphasis solves high accuracy, stability and the reliability of electric energy metrical, rate and period control, and makes every effort to the modular design of each function and the compatibility design of communication protocol.In the intelligent multifunctional instrument, partial data amount (electric flux) needs the instrument follow-up continuation of insurance that has a power failure to deposit.
Find through the retrieval to prior art; Chinese patent literature CN202421387; open day 2012-9-5 has put down in writing a kind of multifunctional digital electric instrument, comprises microprocessing unit, signals collecting input block, display unit, control input block, communication unit, loss protecting unit.But the prior art is regularly data to be saved at regular intervals in the storage matter such as EEPROM, and its shortcoming: storages such as an EEPROM matter has the restriction of writing indegree, and for long-term use need widen the preservation interval, partial data is lost in the time of will causing power down like this.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of multifunction instrument is provided, can realize that data are preserved timely, functions such as current collection measurement amount, energy accumulative total, electric power attributional analysis, remote control, remote signalling are in one.
The present invention is achieved by the following technical solutions, the present invention includes: central processing module, analogue collection module, metering module, the LED drive control module, communication module, the switch acquisition circuit and the switching value output module that have buffer circuit, wherein: electric current and the voltage analog signal of analogue collection module acquisition monitoring terminal also exports metering module to, metering module generates electric current and voltage digital signal by analog to digital conversion and exports the input end of central processing module to, central processing module carries out exporting analysis result information respectively to computing unit and control module behind the electric power attributional analysis according to electric current and voltage digital signal, output control trigger pip is to the LED drive control module, the output differential signal is to communication module, the switch acquisition circuit converts deciliter state of outside high level and low level signal to and is input to central processing module by light-coupled isolation, and the pulse signal after the central processing module inter-process exports the switching value output module to.
Described central processing module comprises: Bus Interface Unit, computing unit, control module and storage unit, wherein: the first input end of Bus Interface Unit links to each other with metering module and received current and voltage digital signal, the Bus Interface Unit process is to exporting numerical information to computing unit after the parsing of electric current and voltage digital signal, second input end of Bus Interface Unit and data power down are from preserving that circuit links to each other and received current and voltage digital signal and transfer to storage unit when installing dead electricity, storage unit links to each other with computing unit and output current and voltage digital signal, computing unit carries out the electric power attributional analysis and exports analysis result to control module according to numerical information, control module carries out the instruction set coupling according to analysis result and generates the control trigger pip, and export analysis result to communication module by Bus Interface Unit respectively, to control trigger pip by Bus Interface Unit and export the LED drive control module to, the output differential signal is to communication module.
Described electric power attributional analysis specifically refers to: the electric current in the reading cells and voltage signal, it is carried out multiply by 3/32 after half-wave integration calculating, the sampling summation, and adopt fourier algorithm:
Wherein: P represents power, and N represents the maximal value of overtone order, and n represents the overtone order number of 1～n, U(n) expression voltage effective value, and I(n) expression current effective value, Ep represents electric energy, dt represents the time, p(t) represents the active power in certain period.
The input end of described central processing module is provided with the data power down from preserving circuit, this data power down comprises from preserving circuit: three diodes, three resistance, a farad capacitor and a triode, wherein: first diode, second diode, first resistance, second resistance and the 3rd diode are connected successively, the base stage of triode is connected between first resistance and second resistance, emitter links to each other with an end of the 3rd resistance and an end of the 4th resistance respectively, the numerical information of voltage and current when the negative electrode of the collector of triode and second diode links to each other with the transmission dead electricity respectively with the standby input end of central processing module, the other end of the 4th resistance all is connected voltage end with the anode of first diode, the equal ground connection of the negative electrode of the other end of the 3rd resistance and the 3rd diode, farad capacitor one end is connected between first diode and second diode, other end ground connection.
Described metering module comprises: digital signal processing unit and communication interface, wherein: the digital information processing unit receives the simulating signal formation voltage effective value, current effective value of voltage, the electric current of analogue collection module collection and transfers to central processing module by communication interface.
Described communication module comprises: communicating circuit and coupled buffer circuit, wherein: communicating circuit receives the differential signal of central processing module output, through buffer circuit it is carried out the filtering anti-interference process, and exports treated differential signal.
Described communicating circuit comprises: communication control unit, two photoelectrical couplers, some Chip-Rs and patch capacitor, wherein: the data sending terminal of communication control unit links to each other with the 4th port of first photoelectrical coupler, connect second port of first Chip-R and second photoelectrical coupler of data receiver, earth terminal with link to each other with the 3rd port of first photoelectrical coupler, be connected first patch capacitor between power end and the earth terminal, the RS end is that trigger end connects second Chip-R, data sending terminal links to each other with the central processing module input end respectively with data receiver, first port of first photoelectrical coupler connects voltage source, second port connects the 3rd Chip-R, the 4th port connects the 5th Chip-R of a termination power, first port of second photoelectrical coupler connects power supply, the 4th port connects the 4th Chip-R, and first photoelectrical coupler the 3rd port links to each other with buffer circuit.
Described buffer circuit comprises: power control unit, patch capacitor and tantalum electric capacity, wherein: second patch capacitor in parallel and the first tantalum electric capacity respectively between the power end of power control unit and the earth terminal, between positive voltage terminal and the no-voltage end; The no-voltage end of power control unit links to each other with communicating circuit.
Described LED drive control module comprises: driving control unit, some Chip-Rs, a patch capacitor and a tantalum electric capacity, wherein: the serial line interface of driving control unit connects the 6th Chip-R of a termination power and the 3rd patch capacitor of an end ground connection respectively, power end connects the parallel circuit of the 4th Chip-R and the second tantalum electric capacity, and serial line interface links to each other with central processing module respectively;
Described driving control unit comprises: digital interface unit and coupled data latches and the LED high-voltage driving circuit of difference, wherein: the input end of digital interface unit links to each other with central processing module and receives operation result information and control trigger pip, operation result information transfers to data latches, the control trigger pip transfers to the LED high-voltage driving circuit, and the coupled data latches of this circuit triggers and the operation result information that will be stored in data latches export external light-emitting diode display to by the output terminal of digital interface unit.
Technique effect
Compared with prior art, data power down of the present invention realizes that from preserving circuit data are preserved timely, make current collection measurement amount of the present invention, energy accumulative total, the electric power attributional analysis, remote control, functions such as remote signalling are in one, can directly replace the conventional electric power transmitter, measure indicating instrument, electric energy measurement instrument and relevant auxiliary unit, also can be used as electric power monitoring system terminal acquisition elements, realize remote data acquisition and control, volume is little, simple in structure, charactron shows, module design, advantage such as easy to operate, and modular structure is reasonable in design, be convenient to on-the-spot the installation and debugging, the present invention supports serial communication MODBUS stipulations.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 preserves circuit diagram certainly for the data power down.
Fig. 3 is the communicating circuit synoptic diagram in the communication module.
Fig. 4 is the buffer circuit synoptic diagram in the communication module.
Fig. 5 is LED drive control module synoptic diagram.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, present embodiment comprises: central processing module, analogue collection module, metering module, the LED drive control module, communication module, the switch acquisition circuit and the switching value output module that have buffer circuit, wherein: electric current and the voltage analog signal of analogue collection module acquisition monitoring terminal also exports metering module to, metering module generates electric current and voltage digital signal by analog to digital conversion and exports the input end of central processing module to, central processing module carries out exporting analysis result information respectively to computing unit and control module behind the electric power attributional analysis according to electric current and voltage digital signal, output control trigger pip is to the LED drive control module, the output differential signal is to communication module, the switch acquisition circuit converts deciliter state of outside high level and low level signal to and is input to central processing module by light-coupled isolation, and the pulse signal after the central processing module inter-process exports the switching value output module to.
The input end of described central processing module is provided with the data power down from preserving circuit, as shown in Figure 2, this data power down comprises from preserving circuit: the first diode D1, the second diode D2, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 3rd diode D3, farad capacitor C1 and triode Q1, wherein: the first diode D1, the second diode D2, first resistance R 1, second resistance R 2 and the 3rd diode D3 series connection, the base stage of triode Q1 is connected between first resistance R 1 and second resistance R 2, emitter links to each other with an end of the 3rd resistance R 3 and an end of the 4th resistance R 4 respectively, the numerical information of voltage and current when the negative electrode of the collector of triode Q1 and the second diode D2 links to each other with the transmission dead electricity respectively with the input end of central processing module, the other end of the 4th resistance R 4 all is connected voltage end VCC with the anode of the first diode D1, the equal ground connection of the negative electrode of the other end of the 3rd resistance R 3 and the 3rd diode D3, farad capacitor C1 one end is connected between the first diode D1 and the second diode D2, other end ground connection.
Described farad capacitor C1 is 0.47F/5.5V electric capacity.
Described central processing module comprises: Bus Interface Unit, computing unit, control module and storage unit, wherein: the first input end of Bus Interface Unit links to each other with metering module and received current and voltage digital signal, the Bus Interface Unit process is to exporting numerical information to computing unit after the parsing of electric current and voltage digital signal, second input end of Bus Interface Unit and data power down are from preserving that circuit links to each other and received current and voltage digital signal and transfer to storage unit when installing dead electricity, storage unit links to each other with computing unit and output current and voltage digital signal, computing unit carries out the electric power attributional analysis and exports analysis result to control module according to numerical information, control module carries out the instruction set coupling according to analysis result and generates the control trigger pip, and export analysis result to communication module by Bus Interface Unit respectively, to control trigger pip by Bus Interface Unit and export the LED drive control module to, the output differential signal is to communication module.
Described electric power attributional analysis specifically refers to: the electric current in the reading cells and voltage signal, it is carried out multiply by 3/32 after half-wave integration calculating, the sampling summation, and adopt fourier algorithm:
Wherein: P represents power, and N represents the maximal value of overtone order, and n represents the overtone order number of 1～n, U(n) expression voltage effective value, and I(n) expression current effective value, Ep represents electric energy, dt represents the time, p(t) represents the active power in certain period.
Voltage end VCC has during normal the operation, C1 is in charged state when farad capacitor, power supply by voltage end VCC through the first diode D1, second diode D2 power supply, and this moment, the base stage of triode Q1 was suitable with the emitter current potential, so the input end of central processing module is high level state, farad capacitor C1 begins discharge and powers to central processing module through the second diode D2 when voltage end VCC has a power failure, this moment triode Q1 base stage and emitter stroke pressure reduction, and the input end VCC central processing module input end that starts central processing module becomes low level and triggers interruption by negative edge, because the effect farad capacitor C1 of the first diode D1 only is central processing module and 1 power supply of first resistance R, its pressure drop is reduced to about 20s of decompression off-air time of central processing module, satisfy the requirement of data holding time, data are saved in the storage unit that central processing module carries.
Described metering module comprises: digital signal processing unit and communication interface, wherein: the digital information processing unit receives the simulating signal formation voltage effective value, current effective value of voltage, the electric current of analogue collection module collection and transfers to central processing module by communication interface, and the error of voltage effective value was less than 0.5% when wherein voltage channel input 1000mv was to the signal of 10mv; The error of current channel input 1000mv current effective value during to the signal of 2mv is less than 0.5%.
Described analogue collection module is gathered electric current and information of voltage, and wherein: it is the chip of TR2155C that current acquisition adopts model, and voltage acquisition adopts the mode of directly gathering.
Described switching value output module is made up of two triodes, two diodes and two optical couplers.
As shown in Figure 3, Figure 4, described communication module comprises: communicating circuit and coupled buffer circuit, wherein: communicating circuit receives the differential signal of central processing module output, through buffer circuit it is carried out the filtering anti-interference process, and exports treated differential signal.
Communicating circuit comprises: communication control unit U205, the first photoelectrical coupler U203, the second photoelectrical coupler U204, the first Chip-R R233, the second Chip-R R234, the 3rd Chip-R R230, the 4th Chip-R R231, the first patch capacitor C230, the 5th Chip-R R232, wherein: the data sending terminal TXD of communication control unit U205 links to each other with the 4th port of the first photoelectrical coupler U203, connect second port of the first Chip-R R233 and the second photoelectrical coupler U204 of data receiver RXD, earth terminal links to each other with the 3rd port with the first photoelectrical coupler U203, be connected the first patch capacitor C230 between power end and the earth terminal, the RS port connects the second Chip-R R234, data sending terminal TXD links to each other with the reception/transmitting terminal of central processing module respectively with data receiver RXD, first port of the first photoelectrical coupler U203 connects voltage source, second port connects the 3rd Chip-R R230, the 4th port connects the 5th Chip-R R232 of a termination power, first port of the second photoelectrical coupler U204 connects power supply, and the 4th port connects the 4th Chip-R R231;
The described second Chip-R R234 is 20K, and the first patch capacitor C230 is 0.1UF, and the first Chip-R R233, the 3rd Chip-R R230, the 4th Chip-R R231, the 5th Chip-R R232 are 510 Ω.
Buffer circuit comprises: power control unit, the second patch capacitor C232, C234, the first tantalum capacitor C 231, C233, wherein: the second patch capacitor C232 in parallel, C234 and the first tantalum capacitor C 231, C233 respectively between the power end Vin of power control unit and the earth terminal GND, between positive voltage terminal+Vo and the no-voltage end;
The no-voltage end of buffer circuit links to each other with the first photoelectrical coupler U203 the 3rd port of communicating circuit, links to each other as two GND2 end among Fig. 3, Fig. 4.
The second patch capacitor C232, C234 are 0.1UF, and the first tantalum capacitor C 231, C233 are 10UF.
As shown in Figure 5, described LED drive control module comprises: driving control unit U401, the 6th Chip-R R401, R402, R403, the 3rd patch capacitor C401, C402, C403, the 4th Chip-R C404, the second tantalum capacitor C 405, wherein: the serial line interface DIO of driving control unit U401, CLK, STB connects the 6th Chip-R R401 of a termination power respectively, R402, the 3rd patch capacitor C401 of R403 and an end ground connection, C402, C403, power end VDD connects the parallel circuit of the 4th Chip-R C404 and the second tantalum capacitor C 405, serial line interface DIO, CLK, STB links to each other with central processing module respectively.
Described driving control unit comprises: digital interface unit and coupled data latches and the LED high-voltage driving circuit of difference, wherein: the input end of digital interface unit links to each other with central processing module and receives operation result information and control trigger pip, operation result information transfers to data latches, the control trigger pip transfers to the LED high-voltage driving circuit, and the coupled data latches of this circuit triggers and the operation result information that will be stored in data latches export external light-emitting diode display to by the output terminal of digital interface unit.
The 6th Chip-R R401, R402, R403 are that Chip-R, the 3rd patch capacitor C401, C402, the C403 of 10K is that patch capacitor, the second tantalum capacitor C 405 of 100PF is the patch capacitor of 0.1UF for the tantalum electric capacity of 100UF, the 4th Chip-R C404.
Behind voltage acquisition and current acquisition, voltage, current analog signal are delivered to special-purpose metering module and are handled, and and carry out the exchange of electric flux and electrical quantity between the central processing module, simultaneously, central processing module is finished functions such as data processing, storage, control and communication, and passes through state and the scanning button operation state of LED drive control module gauge tap amount signal lamp.
Claims (8)
1. multifunction instrument, it is characterized in that, comprise: central processing module, analogue collection module, metering module, the LED drive control module, communication module, the switch acquisition circuit and the switching value output module that have buffer circuit, wherein: electric current and the voltage analog signal of analogue collection module acquisition monitoring terminal also exports metering module to, metering module generates electric current and voltage digital signal by analog to digital conversion and exports the input end of central processing module to, central processing module carries out exporting analysis result information respectively to computing unit and control module behind the electric power attributional analysis according to electric current and voltage digital signal, output control trigger pip is to the LED drive control module, the output differential signal is to communication module, the switch acquisition circuit converts deciliter state of outside high level and low level signal to and is input to central processing module by light-coupled isolation, and the pulse signal after the central processing module inter-process exports the switching value output module to;
The input end of described central processing module is provided with the data power down from preserving circuit, this data power down comprises from preserving circuit: three diodes, three resistance, a farad capacitor and a triode, wherein: first diode, second diode, first resistance, second resistance and the 3rd diode are connected successively, the base stage of triode is connected between first resistance and second resistance, emitter links to each other with an end of the 3rd resistance and an end of the 4th resistance respectively, the numerical information of voltage and current when the negative electrode of the collector of triode and second diode links to each other with the transmission dead electricity respectively with the standby input end of central processing module, the other end of the 4th resistance all is connected voltage end with the anode of first diode, the equal ground connection of the negative electrode of the other end of the 3rd resistance and the 3rd diode, farad capacitor one end is connected between first diode and second diode, other end ground connection;
Described electric power attributional analysis specifically refers to: the electric current in the reading cells and voltage signal, it is carried out multiply by 3/32 after half-wave integration calculating, the sampling summation, and adopt fourier algorithm:
Wherein: P represents power, and N represents the maximal value of overtone order, and n represents the overtone order number of 1～n, U(n) expression voltage effective value, and I(n) expression current effective value, Ep represents electric energy, dt represents the time, p(t) represents the active power in certain period.
2. multifunction instrument according to claim 1, it is characterized in that, described communication module comprises: communicating circuit and coupled buffer circuit, wherein: communicating circuit receives the differential signal of central processing module output, through buffer circuit it is carried out the filtering anti-interference process, and export treated differential signal.
3. multifunction instrument according to claim 2, it is characterized in that, described communicating circuit comprises: communication control unit, two photoelectrical couplers, some Chip-Rs and patch capacitor, wherein: the data sending terminal of communication control unit links to each other with the 4th port of first photoelectrical coupler, connect second port of first Chip-R and second photoelectrical coupler of data receiver, earth terminal with link to each other with the 3rd port of first photoelectrical coupler, be connected first patch capacitor between power end and the earth terminal, trigger end connects second Chip-R, data sending terminal links to each other with the central processing module input end respectively with data receiver, first port of first photoelectrical coupler connects voltage source, second port connects the 3rd Chip-R, the 4th port connects the 5th Chip-R of a termination power, first port of second photoelectrical coupler connects power supply, the 4th port connects the 4th Chip-R, and first photoelectrical coupler the 3rd port links to each other with buffer circuit.
4. multifunction instrument according to claim 2, it is characterized in that, described buffer circuit comprises: power control unit, patch capacitor and tantalum electric capacity, wherein: second patch capacitor in parallel and the first tantalum electric capacity respectively between the power end of power control unit and the earth terminal, between positive voltage terminal and the no-voltage end; The no-voltage end of power control unit links to each other with communicating circuit.
5. multifunction instrument according to claim 1, it is characterized in that, described LED drive control module comprises: driving control unit, some Chip-Rs, a patch capacitor and a tantalum electric capacity, wherein: the serial line interface of driving control unit connects the 6th Chip-R of a termination power and the 3rd patch capacitor of an end ground connection respectively, power end connects the parallel circuit of the 4th Chip-R and the second tantalum electric capacity, and serial line interface links to each other with central processing module respectively.
6. multifunction instrument according to claim 5, it is characterized in that, described driving control unit comprises: digital interface unit and coupled data latches and the LED high-voltage driving circuit of difference, wherein: the input end of digital interface unit links to each other with central processing module and receives operation result information and control trigger pip, operation result information transfers to data latches, the control trigger pip transfers to the LED high-voltage driving circuit, and the coupled data latches of this circuit triggers and the operation result information that will be stored in data latches export external light-emitting diode display to by the output terminal of digital interface unit.
7. multifunction instrument according to claim 1, it is characterized in that, described central processing module comprises: Bus Interface Unit, computing unit, control module and storage unit, wherein: the first input end of Bus Interface Unit links to each other with metering module and received current and voltage digital signal, the Bus Interface Unit process is to exporting numerical information to computing unit after the parsing of electric current and voltage digital signal, second input end of Bus Interface Unit and data power down are from preserving that circuit links to each other and received current and voltage digital signal and transfer to storage unit when installing dead electricity, storage unit links to each other with computing unit and output current and voltage digital signal, computing unit carries out the electric power attributional analysis and exports analysis result to control module according to numerical information, control module carries out the instruction set coupling according to analysis result and generates the control trigger pip, and export analysis result to communication module by Bus Interface Unit respectively, to control trigger pip by Bus Interface Unit and export the LED drive control module to, the output differential signal is to communication module.
8. multifunction instrument according to claim 1, it is characterized in that, described metering module comprises: digital signal processing unit and communication interface, wherein: the digital information processing unit receives the simulating signal formation voltage effective value, current effective value of voltage, the electric current of analogue collection module collection and transfers to central processing module by communication interface.
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| CN104459401A (en) * | 2014-12-08 | 2015-03-25 | 重庆跃达电力设备有限公司 | Signal displaying device of power monitoring system |
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| CN106771383A (en) * | 2017-02-27 | 2017-05-31 | 博耳(无锡)电力成套有限公司 | Wireless telecommunications electric instrument |
| CN110412911A (en) * | 2019-07-15 | 2019-11-05 | 广东爱美信电器有限公司 | A kind of serial communication electrical level matching circuit and intelligence control system |
| CN115179105A (en) * | 2022-07-08 | 2022-10-14 | 深圳华刃智造科技有限公司 | Cutter monitoring circuit and cutter monitoring device |
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| CN106776437B (en) * | 2017-02-06 | 2023-08-18 | 常州汇邦电子有限公司 | Communication circuit, working method thereof and analog signal acquisition and output system |
| CN106771383A (en) * | 2017-02-27 | 2017-05-31 | 博耳(无锡)电力成套有限公司 | Wireless telecommunications electric instrument |
| CN110412911A (en) * | 2019-07-15 | 2019-11-05 | 广东爱美信电器有限公司 | A kind of serial communication electrical level matching circuit and intelligence control system |
| CN110412911B (en) * | 2019-07-15 | 2024-04-05 | 广东爱美信电器有限公司 | Serial port communication level matching circuit and intelligent control system |
| CN115179105A (en) * | 2022-07-08 | 2022-10-14 | 深圳华刃智造科技有限公司 | Cutter monitoring circuit and cutter monitoring device |
| CN115179105B (en) * | 2022-07-08 | 2024-05-10 | 深圳华刃智造科技有限公司 | Cutter monitoring circuit and cutter monitoring device |
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