CN201654106U - Multiple-group electric-power measurement transmission device with full-time and multiplex time-sharing measurement - Google Patents

Multiple-group electric-power measurement transmission device with full-time and multiplex time-sharing measurement Download PDF

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Publication number
CN201654106U
CN201654106U CN2010201200642U CN201020120064U CN201654106U CN 201654106 U CN201654106 U CN 201654106U CN 2010201200642 U CN2010201200642 U CN 2010201200642U CN 201020120064 U CN201020120064 U CN 201020120064U CN 201654106 U CN201654106 U CN 201654106U
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CN
China
Prior art keywords
circuit
power
current
multiplex
timesharing
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Application number
CN2010201200642U
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Chinese (zh)
Inventor
李政良
林献章
曾仁誉
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齐硕科技股份有限公司
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Priority to CN2010201200642U priority Critical patent/CN201654106U/en
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Publication of CN201654106U publication Critical patent/CN201654106U/en

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Abstract

The utility model discloses a multiple-group electric-power measurement transmission device with full-time and multiplex time-sharing measurement, comprising a small measurement transmission body with a wireless transmission function and a multiple-group-current checking input device connected with the small measurement transmission body. The multiple-group electric-power measurement transmission device is installed to be matched with a power switch box. The multiple-group electric-power measurement transmission device can measure the power consumption of a main power at full time and measure the power consumption of each shunt-circuit power in a multiplex time-sharing mode and transmits the power consumption of the main power and each circuit in a distribution box to an outer monitoring system by a wireless Zigbee interface built in the measurement transmission body, so that the purpose of power information gathering and the needs of energy saving, carbon reduction and power safety promotion are achieved.

Description

Has many groups power measurement transmitting device full-time and that multiplex's timesharing is measured
Technical field
The utility model is the many groups power measurement transmitting device design that has full-time and multiplex's timesharing measurement about a kind of, be to use the framework of minimum volume and least cost to measure the power information of general supply and each branch supply in the panel box, as electric power power information collection of the source box of household and small low-voltage electricity consumer etc., because volume is little, again must multi-group power measure together and transmit, so need use very special scheme, simplify and the school power measurement structure of transferring automatically with the utmost point, and cost the very wireless transport module of small size (as the Zigbee Radio Transmission Technology), enable to reach and use wireless and the monitoring device networking, collect the designing technique of source box power information.
Background technology
Power measurement now, mostly be that a kilowatt meter or ammeter are measured a loop, and use wire transmission interface as RS-485 etc., measured power information is transferred to supervising device, therefore in the little power supply panel box in space, to measure under the power information purpose in each loop, just need a plurality of kilowatt meters or a plurality of ammeter and communication distribution each other, not only the space is not enough, dangerous, expensive too, and can't popularize.
The utility model content
The utility model fundamental purpose, be to provide a kind of many groups power measurement transmitting device design full-time and that multiplex's timesharing is measured that has, be one simple in structure, distribution seldom, the multi-group power that volume is very little is again measured and transmitting device, comprise that small-sized measurement transmission body and multiplex's electric current of being made up of many groups of detachable current transformers by radio transmitting device that a common measurement voltage is imported and built-in detects input media, this multiplex's electric current detects input media and connects general supply and each branch supply, this measurement transmission body is linked to multiplex's electric current and detects input media, it can cooperate source box and suitably install and form, when for example implementing, can detect input media and all be located in the source box simultaneously measuring transmission body and multiplex's electric current, or, also can draw individually and be located at outside the source box measuring the transmission body, with this form can full-time measurement general supply and time division multiplexing measure the electricity consumption situation of each branch supply, comprise voltage, each branch current, information such as consumed power and accumulation consumed power, and a shared radio transmitting device (as Zigbee) is sent to outside supervisory system with measured information.
Wherein, this measurement transmission body is connected with one group of general supply incoming line, and the described general supply incoming line outside is provided with the power lead cover; Described measurement transmission body also detects input media via a magnitude of current survey line and an electric current of being made up of a plurality of removable jew current transformers and forms and be connected, wherein two current transformers of big electric current are enclosed within the input end of general supply, the current transformer of all the other less electric currents then be enclosed within other each along separate routes on, each current transformer detects Signal plug and is inserted in current transformer and detects signal plug.
Of the present utility model have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is formed framework and comprises power supply supply and buffer circuit, full-time power measurement circuit, timesharing power measurement circuit, voltage detecting isolation processing circuit, organizes that electric current detects and buffer circuit, time division multiplexing treatment circuit, Zigbee transmission interface circuit and microcontroller circuit and peripheral control circuit more, wherein:
Power supply supply and buffer circuit connect general supply, are used for utilizing the switching type power supply supply circuit from general supply voltage to be measured, to obtain required various low-voltage dc power supplies;
Voltage detecting isolation processing circuit connects general supply, is used for line voltage to be measured is obtained the required voltage signal amplitude of power measurement circuit with fixing ratio, and makes voltage signal and the complete electrical isolation of civil power to be measured;
Many group electric currents detect and buffer circuit, connect general supply and each branch supply, are used to detect the electric current of total current and each branch supply; Described many group electric currents detect and the detection signal of buffer circuit is obtained by the current transformer of removable jew, the current transformer opening of removable jew is opened and is allowed electric wire to be measured pass the iron core hole of current transformer, and then closing any opening, every group of current transformer all provide one group of ratio in the voltage signal of detecting electric wire current signal to the time division multiplexing treatment circuit;
Full-time power measurement circuit, connect described voltage detecting isolation processing circuit and organize electric current more and detect and buffer circuit, be used to receive general supply voltage signal, reach general supply current signal from many groups current detecting and buffer circuit from voltage detecting isolation processing circuit; With both signals after full-time power measurement, with power measurement and the electric energy accumulation results is delivered to microprocessor and peripheral control circuit removes to be processed into the general supply power information that desire is sent backward;
The time division multiplexing treatment circuit, connecting described many group electric currents detects and buffer circuit, being used for timesharing switches in turn from many groups electric current and detects and the current signal of buffer circuit, convert this current signal to voltage signal, and give timesharing power measurement circuit by the voltage signal that each group current transformer of switching is sensed;
Timesharing power measurement circuit, connect described voltage detecting isolation processing circuit and time division multiplexing treatment circuit, be used for receiving, from the total voltage signal of voltage detecting isolation processing circuit with from each branch current signal of time division multiplexing treatment circuit, the mode of taking turns with timesharing is measured and is accumulated each power information along separate routes, this time division multiplexing treatment circuit is with fixing, correct time is switched each current signal along separate routes in timesharing, timesharing power measurement circuit then cooperates power measurement and accumulation electric energy synchronously, and each result along separate routes delivered to microprocessor and peripheral control circuit goes each power measurement information along separate routes of time-division processing, and calculate via the ratio of program, with each real power information along separate routes of reduction;
Microprocessor and peripheral control circuit, connect described full-time power measurement circuit, timesharing power measurement circuit and time division multiplexing treatment circuit, be used to handle and calculate full-time and the data timesharing power measurement, convert real general supply and each branch supply electric power and consumption information to, and via Zigbee transmission interface circuit, use wireless communication mode, with measured power information and outer monitoring system line;
Zigbee transmission interface circuit, connect described microprocessor and peripheral control circuit, the power information that is used for measuring is sent to the outside and has the supervisory system of Zigbee transmission interface equally via built-in Zigbee wireless transport module, and forms the networking automatically with the outer monitoring system.
Secondary objective of the present utility model, be to provide a kind of many groups power measurement transmitting device design full-time and that multiplex's timesharing is measured that has, the external monitoring system can be provided, collect the accumulative total consumed power information in general supply and each loop, supervisory system can be passed through these data, finish the statistics and analysis work of energy resource consumption, to reach energy management and carbon reduction purpose.
Another purpose of the present utility model, be to provide a kind of many groups power measurement transmitting device design full-time and that multiplex's timesharing is measured that has, can provide supervisory system to collect general supply and each instant power information along separate routes, comprise instant consumed power and electric current and voltage etc., supervisory system can judge whether multiplexing electric abnormality and security by these data, can sound a warning immediately, also can store metric data and draw various forms such as electric power trend map.
Description of drawings
Fig. 1 the utlity model has composition aspect graph full-time and many groups power measurement transmitting device that multiplex's timesharing is measured.
Fig. 2 measures and transmits the composition aspect graph of body for the utility model.
Fig. 3 detects the composition aspect graph of input media for the utility model multiplex (MUX) electric current.
Fig. 4 is applied in the configuration schematic diagram of single-phase three-wire household electrical source panel box for the utility model.
Fig. 5 the utlity model has composition framework calcspar full-time and many groups power measurement transmitting device that multiplex's timesharing is measured.
Fig. 6 the utlity model has circuit diagram full-time and many groups power measurement transmitting device that multiplex's timesharing is measured.
Fig. 7 the utlity model has circuit diagram full-time and many groups power measurement transmitting device that multiplex's timesharing is measured.
Component names:
1.1 general supply line
1.2 power lead cover
1.3 measure and the transmission body
1.4 magnitude of current survey line (containing fixed cover)
1.5 multiplex's electric current detects input media
1.6 the general supply electric current detects detachable current transformer (100A)
1.7 branch current detects detachable current transformer (60A)
1.8 current transformer detects Signal plug
1.9 current transformer detects signal plug
1.31 loam cake inscription plate
1.32 operation touch-control inscription plate
1.33 loam cake
1.34Zigbee wireless transport module
1.35 power measurement substrate
1.36 isolated from power PT
1.37 lower cover
1.51 outer shell base
1.52 commutation circuit plate.
1.53 the integrated circuit that the multiplex (MUX) is switched
1.54 connector
4.1 general supply input
4.2 main power switch
4.4 general supply wiring
4.10 branch switch
Square 5.1 power supply supply and buffer circuits
Square 5.2 full-time power measurement circuit
Square 5.3 timesharing power measurement circuit
Square 5.4 voltage detecting isolation processing circuit
Square more than 5.5 group electric currents detect buffer circuit
Square 5.6 time division multiplexing treatment circuits
Square 5.7Zigbee transmission interface circuit
Square 5.8 microprocessors and peripheral control circuit
Embodiment
As shown in Figure 1, of the present utility model have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, its preferred embodiment comprises one group of common general supply line 1.1 includes measurement and wireless Zigbee transmission through 1.2 to one in power lead cover body 1.3, and via 1.4 and one of magnitude of current surveys line (containing fixed cover) by a plurality of (as shown being ten) removable jew current transformer 1.6,1.7 detect input media 1.5 in formed multiplex's electric current, in use will be as shown in the figure than two current transformers 1.6 (100A) of big electric current, can open the input end that clasp is enclosed within general supply, all the other eight less current transformers 1.7 (60A) just are enclosed within other each shunt, each current transformer detects Signal plug 1.8 during use, is inserted in current transformer and detects on the signal plug 1.9; And the voltage input directly is connected on after the total power switch, provide power supply to the usefulness of measuring and transmit the internal circuit of body 1.3 on the one hand, on the one hand via the PT device of measuring and transmit body 1.3 inside, take out proper proportion voltage, offer the voltage signal of measuring and transmitting body 1.3 inner full-time measurements and timesharing measurement, the general supply electric current is to be enclosed within via two bigger removable jew current transformers (CT) 1.6 that induction obtains on the input electric wire of general supply, directly enter the metering circuit of measuring and transmitting body 1.3, so can obtain full-time general supply energy resource consumption information, other electric currents along separate routes then are to detect eight the removable jew CT 1.7 that pull out on the input media 1.5 via electric current, be enclosed within respectively that induction obtains on each return wire, and switch via the timesharing that electric current detects input media 1.5 inside, in turn eight branch current multiplex (MUX)s are measured, but calculating via program, still can obtain the energy resource consumption information in each loop, again together via the wireless transmission interface of measuring and transmission body 1.3 is built-in (is preferable with the wireless transmission interface that uses the Zigbee technology), general supply in the switch box and each branch supply consumption information are sent to the outer monitoring device, to reach the needs that purpose that power information collects and carbon reduction and Electrical Safety expand.
As shown in Figure 2, it measures and transmits the composition form of body 1.3 for the utility model, mainly be the related framework and the connected mode of each assembly of being connected of expression, it comprises loam cake inscription plate 1.31, an operation touch-control inscription plate 1.32, a loam cake 1.33, a Zigbee wireless transport module 1.34, a power measurement substrate 1.35, an isolated from power PT 1.36, wherein:
One loam cake inscription plate 1.31 for protection Zigbee transport module, makes to avoid being subjected to external force to touch;
One operation touch-control inscription plate 1.32 can supply touch control operation, and electric insulation;
One loam cake 1.33 provides the mount of internal measurement substrate and transport module to use;
One Zigbee wireless transport module 1.34;
One power measurement substrate 1.35;
One isolated from power PT 1.36 can and provide the measuring-signal of common voltage for insulating power supply;
One lower cover 1.37, with loam cake 1.33 using screw closure, for combining closely and the firm line cover 1.4 at two ends (power lead cover and current measurement line covers);
One magnitude of current survey line (containing fixed cover) 1.4, the moulding and the groove of collocation outer casing mold make the wire connecting safety and firmness;
Utilize above-mentioned member, combine for Zigbee wireless transport module 1.34, power measurement substrate 1.35, isolated from power PT 1.36 being inserted in loam cake 1.33 and the lower cover 1.37 and setting firmly, and then loam cake is engraved plate 1.31 and operation touch-control inscription plate 1.32 lock and be incorporated into loam cake 1.33, and the housing two ends respectively are provided with the magnitude of current survey line (containing fixed cover) 1.4 (power lead cover and current measurement line cover) of a coupling combination, make magnitude of current survey line (containing fixed cover) but the connection electric wire of 1.4 safety and firmnesses, in order to constitute measurement of the present utility model and transmission body 1.3.
Fig. 3 detects the composition form of input media 1.5 for the utility model multiplex (MUX) electric current, mainly be the related framework and the connected mode of each assembly of being connected of expression, it mainly comprises an outer shell base 1.51, and switches integrated circuit 1.53 and a connector 1.54 of circuit board 1.52, multiplex (MUX) switching, wherein:
Outer shell base 1.51 detects the overall appearance of input media mould injection body for multiplex's electric current;
Commutation circuit plate 1.52 is an electric current timesharing commutation circuit plate, and its upper end combination is provided with the socket 1.9 that a plurality of current transformers detect signal, and is provided with 10 sockets 1.9 in present embodiment altogether, in order to 10 current transformer signals inputs to be provided;
The integrated circuit 1.53 that the multiplex (MUX) is switched is for an integrated circuit (IC) that provides the multiplex (MUX) to switch, for being located on the commutation circuit plate 1.52;
Connector 1.54 is the connector of electric current timesharing switch boards, and coupling is incorporated on the commutation circuit plate 1.52;
According to above-mentioned member, it is to utilize mould to annotate mode the integrated circuit 1.53 and the connector 1.54 of socket 1.9, commutation circuit plate 1.52, multiplex's switching are formed with mould encapsulating total incapsulation together, connector 1.54 other ends then connect the magnitude of current and measure line (containing fixed cover) 1.4, detect input media 1.5 in order to constitute multiplex's electric current of the present utility model.
Fig. 4 is applied in the configuration schematic diagram of single-phase three-wire household electrical source panel box for the utility model, be general supply line 4.1 as shown in FIG., code name is respectively L1, L2 and N, article three, power lead, wherein N is a ground wire, 4.2 be main power switch (no-fuse switch N.B), control L1 and two live wires of L2 are opened and are closed, and after the main power switch, have 8 branch switches 4.10 (as shown in the figure) among the figure, switch is controlled eight branch supplies respectively, as shown in FIG., measure transmission body 1.3, pull out general supply wiring 4.4 by the utility model, be connected on the general supply end of total power switch 4.2, to obtain the general supply voltage signal and to provide the utility model inner required power supply.The general supply electric current detects part in addition, then use big (100A) detachable current transformer 1.6 of two builds of numbering 9 and 10 among the figure, be enclosed within on general supply incoming line L1 and the L2, in addition, 1.7 of a plurality of detachable current transformers as 8 numberings 1~8 among the figure are enclosed within respectively on each out-put supply line along separate routes, and every current transformer 1.6 or 1.7 all is connected to a plug 1.8 as shown in FIG., being inserted in multiplex's electric current detects on 10 sockets 1.9 such as 1~10 grade of 1.5 layouts of input media, so just finish the power measurement configuration of whole general supply of whole panel box and branch supply, behind total power switch ON, each branch supply is measured in measurement and the transmission just full-time measurement general supply of body and timesharing, and with measured information via measuring the built-in Zigbee wireless transport module 1.34 of transmission body 1.3, power information is penetrated distribution iron case, direct and outer monitoring equipment is linked to be network automatically, reaches electric power and collects purpose.
By above-mentioned Fig. 1 to shown in Figure 4, as seen the utility model can provide a kind of very simple and easy, mode of par very really, by the wireless electricity consumption situation that just can obtain the inner general supply of switch box and each branch supply, reach the purpose of power information collection and the needs of carbon reduction and Electrical Safety expansion from the outer monitoring system.
Fig. 5 is a composition form and function calcspar of the present utility model, and the main action and the relevance of each square are described as follows:
Square 5.1 power supply supply and buffer circuits mainly are from general supply voltage to be measured, utilize the switching type power supply supply circuit, obtain the required various low-voltage dc power supplies of the utility model, and reach the purpose with the civil power electrical isolation.
Square 5.2 full-time power measurement circuit, it is the power information of unremitting always measurement and accumulation general supply, its measuring-signal, the general supply voltage signal of voltage segment after from square 5.4 voltage detecting isolation processing, current segment are from many groups current detecting of square 5.5 and the general supply current signal after isolating.Both signals just can be delivered to its power measurement and electric energy accumulation results the microprocessor and the periphery control of square 5.8 and remove to be processed into the general supply power information that desire is sent backward after square 5.2 full-time power measurements.
Square 5.3 timesharing power measurement circuit, it is power information of measuring and accumulate each shunt in the mode that timesharing takes turns, its measuring-signal, the total voltage signal of voltage segment after from square 5.4 voltage detecting isolation processing, each branch current signal after current segment is then handled from square 5.6 time division multiplexings, this time division multiplexing is with fixing, correct time is switched each current signal along separate routes in timesharing, square 5.3 timesharing power measurements then cooperate power measurement and accumulation electric energy synchronously, and each result along separate routes delivered to square 5.8 microprocessors and each power measurement information along separate routes of time-division processing is gone in periphery control, and calculate reducible each real power information along separate routes via the ratio of program.
Square 5.4 voltage detecting isolation processing circuit, its main function is with line voltage to be measured, obtain the suitable required voltage signal amplitude of power measurement circuit with fixing ratio, and this voltage signal and the complete electrical isolation of civil power to be measured, safety in utilization increased.
Square more than 5.5 group electric currents detect and buffer circuit, its main function is the electric current that detects total current and each branch supply, current transformer (CT) with detachable (can open mouth), opening is opened and is allowed electric wire to be measured pass the iron core hole of current transformer, and then closing any opening, at this moment the magnetic field that electric wire to be measured produces because of electric current just can be on this current transformer induction current, this electric current is through the load (being commonly referred to as resistance) of current transformer, just produce the voltage signal that becomes certain ratio with electric current on the electric wire to be measured, that is finish that electric current detects and the double-deck purpose of electrical isolation, in other words, every group of current transformer can both provide one group of ratio to handle to square 5.6 time division multiplexings in the voltage signal of detecting electric wire current signal.
Square 5.6 time division multiplexing treatment circuits, its main function be timesharing switch in turn from square more than 5.5 organize electric currents detect and isolate after current signal, this current signal is to be converted into voltage signal at this, this square is just accurately to reach the regular time ratio, switch each voltage signal of sensing of group current transformer and give square 5.3 timesharing power measurements, make to reach, can measure the purpose of multiple groups of loop, and reduce material cost and reduced volume with one group of power measurement circuit.
Square 5.7Zigbee transmission interface circuit, its main function is exactly with measured power information, via the built-in Zigbee wireless communication module of this square, be sent to the outside supervisory system of Zigbee interface that has equally, and forming the networking automatically with the outer monitoring system, the information that reaches links and the purpose of communication.
Square 5.8 microprocessors and peripheral control circuit, be control center of the present utility model, built-in control program, can handle and calculate information by the full-time and timesharing power measurement of square 5.2 and square 5.3, convert real general supply and each branch supply electric power and consumption information to, and, use wireless communication mode via square 5.7Zigbee transmission interface, with measured power information and outer monitoring system line, reach total electric each the shunt power information that reaches of panel box and collect purpose.
Below explanation the utlity model has each square operating principle and effect thereof full-time and many groups power measurement transmitting device that multiplex's timesharing is measured:
As shown in Figure 6, square 5.1 is power supply supply and buffer circuit, contact P1 and P2 are the general supply input among the figure, P1 is through fuse F1, squelch inductance L 2 and commutation diode D1 half-wave rectification, EC1, EC2, R1, L3 form filtering circuit, and RV1 is a surge absorber, prevent that surging group from rushing in into electric source filter circuit; U3 is switching regulator voltage stabilizing IC (integrated circuit), its working power is by 4 of T1,5 windings are obtained power supply, and via D5, C11, R13, the rectification of C18 etc. and filtering, D4, C7, R2, ZD1 and R5 form switch U3 and caused pulse voltage elimination circuit, T1 is except doing the electric energy conversion, and also electrical isolation power supply and secondary low-voltage loop, the secondary low-voltage loop is through D2, C3, L1, C4, C5, D3, L5 and D6, EC3, R8, D7, the rectification of C15 etc. and filtering circuit, provide two power supplys be respectively+5V and-1V uses to other circuit of the utility model, 5V part wherein, through R22, R23, SHR1, R17, the back coupling effect of R18 and U4 light isolation IC etc., can obtain a stable 5V power supply,-1V then is a forward voltage stabilization of utilizing D7LED, and obtains the negative voltage supply of about-1V.
General supply input P1 and P2, except receiving square 5.1, also receive square 5.4 voltage detecting simultaneously every treatment circuit, the P1 contact is through R9 among the figure, R12, R16 and T2 are to the P2 contact, wherein T2 is for isolating PT, the coil number of coil winding 1-2 and 3-4 is the same, expression primary winding (1-2) and secondary coil (3-4) are flowing the electric current of identical size, and the voltage on the expression R20 is and P1, voltage on the P2 exists with the certain proportion relation, in other words, via the isolation ratio depressor (PT) of T2, can on the pull-up resistor of second siding ring, measure the P1 of primary side indirectly, P2 general supply voltage, and with the general supply electrical isolation, avoid getting an electric shock, increase security.
Square 5.2 full-time power measurement circuit, U2 is electric energy measurement IC among the figure, base is from the X1 oscillating crystal during work of this IC, oscillatory circuit with compositions such as C16, C17, R10, produce stable frequency of operation, give square 5.3 another electric energy IC U1, shared this signal via R11 simultaneously.Needed two signal sources of electric energy measurement IC U2, be V1 and V2, receive current signal to be measured and voltage signal respectively, wherein current signal is via R4, R7, C8, C10, link on the contact of S1-2 and S1-3 among the figure, this contact is from the output of CT9 and two removable jew current transformers of CT10 of square 5.6, and voltage signal is connected among the figure on the PT-1 and PT-2 contact via R21, R15, C20, C14, and this contact is from the voltage signal on secondary side 3, the 4 pin R20 of the isolation ratio depressor T2 of square 5.4.These full-time of two signals continue to be connected on the V1 of U2 and the access pin of V2, so be referred to as full-time power measurement, in other words, the utility model is the power information of full-time measurements general supply, its measurement result is exported with pulse signal CF2 in figure, its frequency direct proportion is counted the frequency of handling CF2 in the value of being surveyed by square 5.8, just can learn the power consumption and the accumulated value of general supply.
Square 5.3 timesharing power measurement circuit, U1 is the shared work time-base signal of electric energy measurement IC and U2 among the figure, its principle of work is similar to U2, difference is at V1 and the V2 of U1, can switch the control of IC via U5 multiplex (MUX), so have multiple output information at CF1, though all be the microprocessor that outputs to square 5.8 with the pulse signal kenel, but because U5 multiplex (MUX) is switched the control that IC is subjected to C3, C4, C5, four control lines of C6, make CF1 have signals such as W, V, I and occur, can measure each power information such as power, accumulation electric energy and voltage and current along separate routes.
Shown in Fig. 7 square 5.5, for many group electric currents detect and buffer circuit, CT1~CT8 is external removable jew current transformer among the figure, each current transformer all corresponds to 1 pull-up resistor, be R24, R25, R26, R30, R36, R38, R42, R45 etc., external removable jew current transformer, be that current transformer is enclosed within on the wire loop to be measured, respond to the magnetic field of this electric wire, magnetic field intercepts current transformer coil produces electric current, this electric current flows through the pull-up resistor that is connect, just produce voltage at its resistance two ends, and this voltage just direct proportion in electric wire electric current, in other words through this CT iron core, on each pull-up resistor, all can measure the branch current that each corresponding current transformer institute desire is measured indirectly, and electrical isolation.
Square 5.6 time division multiplexing treatment circuits, mainly be to utilize the linearity switching IC of U8 a pair of eight to do the switching selection, that is A, B, the current potential of C pin of control U8, the may command output pin is that the electric current of the arbitrary group of current transformer of S1-1 connection CT1~CT8 detects voltage, in other words, by square 5.8 microprocessors, by A, B, the C of S1-4,5,6 pin timesharing control U8, just can select a group in eight branch currents that the institute desire measures, reach the purpose that time division multiplexing is measured.In addition, CT9 and CT10 and R41, R47 are the detection current transformer of general supply among the figure, and its total current that detects detects signal not through switching, and supplies with square 5.2 full-time power measurements, can obtain complete general supply power information for full-time.
Square 5.8 microprocessors and peripheral control circuit, U11 is little processing IC (μ P) among the figure, includes program and I/O etc., and base is supplied by Y1 during its work, and U9 is memory IC, but storing measurement data, but the still retention data that cuts off the power supply.D10 is the electric energy indication LED in addition, lights once when the every consumption of total electricity 1Wh, as the usefulness of electric energy correction.Number S1-4 among the figure, S1-5, S1-6, be used for selecting branch current to measure, C3, C4, C5, C6 is used for controlling the electric energy measurement IC of square 5.3 timesharing metering circuits, the V1 of U1 and V2 content, because of U1 can be with two signal multiplications of V1 and V2, and with the kenel of pulse output metrical information, therefore, as long as in the program of microprocessor, handle the program and the step of measurement well, just can obtain W (V1=V, V2=I from the output CF1 of timesharing power measurement IC (U1), V * I), V (V1=V, V2=V, V * V=V2) and I (V1=I, V2=I, I * I=I2), and then collocation multiplex (MUX) timesharing selects branch current, can obtain the W of each group, V, data such as I and Wh, putting into different categories is placed in the U9 memory IC.And can link up via the Zigbee communication module of TXD among the figure and RXD signal wire and square 5.7, reach the purpose of measurement data via Zigbee wireless transmission and networking.
Square 5.7Zigbee transmission interface circuit, U7 is the Zigbee communication module among the figure, its working power is 3.3V, pass through the 3.3V voltage stabilizing IC of U6 from the power supply of 5V, and obtain the operating voltage of 3.3V, U10 is capacitance touching control IC, KEY1 and KEY2 are two touch points among the figure, are designed near the loam cake, via close KEY1 of human finger or KEY2, U10 can change its changes in capacitance into the output signal of numeral, i.e. BUTTON1 and BUTTON2 among the figure, each corresponding its touch point KEY1 and KEY2, in other words, finger is approaching across the inscription plate, can make the current potential of BUTTON1 and BUTTON2 generation HI and LOW, but for example hand bumps KEY1, can and then control U7 implementation networking and set and match, or but hand bumps KEY2 and also can make D9 indication LED flicker, indicator signal intensity is for example dodged and is represented a little less than the signal, and it is strong to dodge five expression signals, D8 then is that every line once glimmers once, represents communication OK.The transmission data then are the interfaces via RXD and TXD, and with the two-way communication of square 5.8U11 microprocessor, in other words, the main task of this square is exactly to serve as the task of external line, and finishes the purpose of automatic networking by the communications protocol of Zigbee.CON 1 is the reservation runners of burned Zigbee modular program among the figure, can revise or upgrade the application program of Zigbee module by this interface.
Except that the foregoing description explanation, relevant for concrete application of the present utility model, described measurement transmission body 1.3 and multiplex's electric current detect the main member of input media 1.5, from being not limited to and being installed in simultaneously in the source box, during the utility model practice, from changing optionally and flexibly, for example illustrated magnitude of current survey line 1.4, its length should be regardless of specific, where necessary, but also proper extension magnitude of current survey line 1.4, so that can not draw outside any place with measuring 1.3 of bodies of transmission in source box, and the other end of measuring transmission body 1.3 also only need plug and link general civil power, also belongs to concrete application category of the present utility model.
The foregoing description is disclosed; it only is the explanation that exemplifies of the utility model major technique; but be not in order to limit technical scope of the present utility model; all simple and easy change or displacements that relates to equivalent application or do based on the preceding paragraph technological means; all should be considered as belonging to the utility model protection domain; for example utilize time division multiplexing to measure the electric current of other quantity, or measure three component roads and regard three-phase power information etc.

Claims (9)

1. one kind has many groups power measurement transmitting device full-time and that multiplex's timesharing is measured, it is characterized in that, comprising one built-inly has small-sized measurement transmission body and multiplex's electric current of radio transmitting device to detect input media, this multiplex's electric current detects input media and connects general supply and each branch supply, this measurement transmission body is linked to multiplex's electric current and detects input media, the power consumption that each branch supply is measured in full-time measurement general supply and multiplex's timesharing, and, measured every power information is sent to the outer monitoring system with wireless transmission method via measuring the built-in radio transmitting device of transmission body.
2. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that it is the Zigbee wireless transport module that the built-in radio transmitting device of body is transmitted in this measurements.
3. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that, this measurements is transmitted body and multiplex's electric current and detected input media and insert in source box simultaneously.
4. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that, this measurements transmission body utilizes the prolongation of magnitude of current survey line to link and will measure and transmit body and be seated in outside the switch box.
5. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that this measurements transmission body is connected with one group of general supply incoming line, is provided with the power lead cover outside the described general supply incoming line; Described measurement transmission body also detects input media via a magnitude of current survey line and an electric current of being made up of a plurality of removable jew current transformers and forms and be connected, wherein two current transformers of big electric current are enclosed within the input end of general supply, the current transformer of all the other less electric currents then be enclosed within other each along separate routes on, each current transformer detects Signal plug and is inserted in current transformer and detects signal plug.
6. as claimed in claim 5 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, described other electric currents along separate routes detect the timesharing commutation circuit of input media inside via electric current, carry out each branch current multiplex (MUX) in turn and measure.
7. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, this measurement transmission body comprises loam cake inscription plate, one operation touch-control inscription plate, one loam cake, one Zigbee wireless transport module, an one power measurement substrate and an isolated from power PT, lower cover and loam cake are sealed, and the two ends line cover of combining closely, thereby with wireless transport module, the power measurement substrate, the isolated from power PT is inserted in loam cake and the lower cover and is set firmly and combines, loam cake is engraved plate and operation touch-control inscription plate lock and be incorporated into loam cake, and each coupling of housing two ends is in conjunction with a line cover.
8. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, this multiplex's electric current detects input media and comprises an outer shell base, one switches circuit board, integrated circuit and a connector that one multiplex (MUX) is switched, outer shell base is formed by detect input media mould injection body with multiplex's electric current, the commutation circuit plate is an electric current timesharing commutation circuit plate, its upper end is in conjunction with being provided with the socket that a plurality of current transformers detect signal, an integrated circuit that provides the multiplex (MUX) to switch is provided the integrated circuit that the multiplex (MUX) is switched, be located on the commutation circuit plate, connector is the connector of electric current timesharing switch boards, and coupling is incorporated on the commutation circuit plate, utilize mould to annotate mode with socket, the commutation circuit plate, integrated circuit that the multiplex (MUX) is switched and connector with mould encapsulating total incapsulation together, the connector other end then connects electric wire and line cover.
9. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, it is formed framework and comprises power supply supply and buffer circuit, full-time power measurement circuit, timesharing power measurement circuit, voltage detecting isolation processing circuit, organizes that electric current detects and buffer circuit, time division multiplexing treatment circuit, Zigbee transmission interface circuit and microcontroller circuit and peripheral control circuit more, wherein:
Power supply supply and buffer circuit connect general supply, are used for utilizing the switching type power supply supply circuit from general supply voltage to be measured, to obtain required various low-voltage dc power supplies;
Voltage detecting isolation processing circuit connects general supply, is used for line voltage to be measured is obtained the required voltage signal amplitude of power measurement circuit with fixing ratio, and makes voltage signal and the complete electrical isolation of civil power to be measured;
Many group electric currents detect and buffer circuit, connect general supply and each branch supply, are used to detect the electric current of total current and each branch supply; Described many group electric currents detect and the detection signal of buffer circuit is obtained by the current transformer of removable jew, the current transformer opening of removable jew is opened and is allowed electric wire to be measured pass the iron core hole of current transformer, and then closing any opening, every group of current transformer all provide one group of ratio in the voltage signal of detecting electric wire current signal to the time division multiplexing treatment circuit;
Full-time power measurement circuit, connect described voltage detecting isolation processing circuit and organize electric current more and detect and buffer circuit, be used to receive general supply voltage signal, reach general supply current signal from many groups current detecting and buffer circuit from voltage detecting isolation processing circuit; With both signals after full-time power measurement, with power measurement and the electric energy accumulation results is delivered to microprocessor and peripheral control circuit removes to be processed into the general supply power information that desire is sent backward;
The time division multiplexing treatment circuit, connecting described many group electric currents detects and buffer circuit, being used for timesharing switches in turn from many groups electric current and detects and the current signal of buffer circuit, convert this current signal to voltage signal, and give timesharing power measurement circuit by the voltage signal that each group current transformer of switching is sensed;
Timesharing power measurement circuit, connect described voltage detecting isolation processing circuit and time division multiplexing treatment circuit, be used for receiving, from the total voltage signal of voltage detecting isolation processing circuit with from each branch current signal of time division multiplexing treatment circuit, the mode of taking turns with timesharing is measured and is accumulated each power information along separate routes, this time division multiplexing treatment circuit is with fixing, correct time is switched each current signal along separate routes in timesharing, timesharing power measurement circuit then cooperates power measurement and accumulation electric energy synchronously, and each result along separate routes delivered to microprocessor and peripheral control circuit goes each power measurement information along separate routes of time-division processing, and calculate via the ratio of program, with each real power information along separate routes of reduction;
Microprocessor and peripheral control circuit, connect described full-time power measurement circuit, timesharing power measurement circuit and time division multiplexing treatment circuit, be used to handle and calculate full-time and the data timesharing power measurement, convert real general supply and each branch supply electric power and consumption information to, and via Zigbee transmission interface circuit, use wireless communication mode, with measured power information and outer monitoring system line;
Zigbee transmission interface circuit, connect described microprocessor and peripheral control circuit, the power information that is used for measuring is sent to the outside and has the supervisory system of Zigbee transmission interface equally via built-in Zigbee wireless transport module, and forms the networking automatically with the outer monitoring system.
CN2010201200642U 2010-02-26 2010-02-26 Multiple-group electric-power measurement transmission device with full-time and multiplex time-sharing measurement CN201654106U (en)

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