CN2754194Y - Current mutual inductor with passive wireless transmission function - Google Patents
Current mutual inductor with passive wireless transmission function Download PDFInfo
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- CN2754194Y CN2754194Y CN 200420114221 CN200420114221U CN2754194Y CN 2754194 Y CN2754194 Y CN 2754194Y CN 200420114221 CN200420114221 CN 200420114221 CN 200420114221 U CN200420114221 U CN 200420114221U CN 2754194 Y CN2754194 Y CN 2754194Y
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Abstract
The utility model relates to a current mutual inductor with a passive wireless transmission function. The induction current of a current mutual inductor is transmitted to a receiver unit by the wireless transmission mode. The utility model comprises an induction coil sheathed with a connecting wire with heavy current, wherein the output end of the induction coil is connected with a current transformer. The utility model is characterized in that the output end of the current transformer is connected with a passive wireless transmission module of which the signals are transmitted by a transmission aerial. An active wireless receiving module receives the signals by a receiving aerial. The output end of the active wireless receiving module is connected with a monitoring center. The utility model does not need external power supply and receives the voltage signals at the receiving unit. The wireless transmission rate reaches 1000 impulses per second. The receiving unit can flexibly receive the wireless signals within the 2 meters range and the wireless signals are restored into the voltage signals, and the receiving unit can be connected with a computer.
Description
Technical field
The utility model relates to a kind of current transformer with passive and wireless transfer function, by wireless transmission, the induced electricity flow valuve of current transformer is transferred to receiving element.
Background technology
At present, the current signal of current transformer output is to export in wired mode, line difficulty under the situation of high-voltage large current, especially in flame proof electrical equipment, need monitor and when transshipping, implement outage to electric current, therefore need to solve under the situation that does not change original mechanical structure the difficult problem that current signal is spread out of.
The utility model content
The way of output that the purpose of this utility model is to overcome existing current transformer is difficult to adapt to the deficiency of wireless telemetering, a kind of current transformer with passive and wireless transfer function is provided, passive function is meant that transmitter unit passes through the electric current mutual inductance and obtains energy, need not externally fed.Wireless transmission function refers to send current signal that the current transformer conversion is obtained by wireless mode, receives voltage signal at receiving element.
For achieving the above object, the utility model adopts following technical scheme:
A kind of current transformer with passive and wireless transfer function, comprise an induction coil that is set in big ampere wires, the output of induction coil connects a current transformer, the output that it is characterized in that current transformer connects a passive and wireless transmitter module, the passive and wireless transmitter module goes out signal by its transmission antennas transmit, an active radio receiver module is by its reception antenna received signal, and the output of active radio receiver module connects Surveillance center.
The circuit structure of above-mentioned passive and wireless transmitter module is: the input of a power circuit connects the output of current transformer, and its output is connected a transmitting antenna through a voltage controlled oscillator V/F circuit with a wireless transmission circuit, and power circuit also provides working power for voltage controlled oscillator V/F circuit and wireless transmission circuit.
The structure of above-mentioned current circuit is: one one of a termination of output is shaken and is flowed the positive pole of diode, the negative pole of another termination capacitor and ground connection, the positive level of the negative pole of described diode and described electric capacity is joined with 1 pin of a voltage-stabiliser tube, 2 pin ground connection of described voltage-stabiliser tube, and its 3 pin output+5V voltage is voltage controlled oscillator V/F circuit and wireless transmission circuit power supply; 1 pin of a slide rheostat and the two ends of 2 pin and described electric capacity join, and 3 pin output voltage V i of its slip connect voltage controlled oscillator V/F circuit.
The circuit structure of above-mentioned voltage controlled oscillator V/F circuit is: connect a resistance with power circuit output voltage V i as input voltage, ground connection after this resistance and the capacitances in series, described resistance is connected the voltage input signal of 7 pin of a voltage controlled oscillator V/F chip as this chip with the pin that the pin that electric capacity links to each other is drawn, 1 pin and 6 pin of chip join, 1 pin of the described chip of one termination of an electric capacity and a resistance parallel connection, and other end ground connection, ground connection after the 2 pin series resistances of described chip, and 4 pin ground connection, 5 pin are connected between a resistance and the electric capacity, this resistance other end ground connection, the minus earth of this electric capacity, 8 pin of described chip connect+the 5V power supply, and 3 pin are exported as the signal of voltage controlled oscillator V/F circuit through a resistance, and described chip adopts the LM331 cake core.
The circuit structure of above-mentioned wireless transmission circuit is: 8 pin of a wireless data transmission chip connect the signal output of voltage controlled oscillator V/F circuit, an electric capacity is in parallel with a resistance, one end ground connection, 1 pin of the described chip of another termination, and connect after the series resistance+the 5V power supply; After three electric capacity parallel connections, an end ground connection is also introduced 3 pin of described chip, and another termination+5V power supply is also introduced 2 pin of described chip; Ground connection behind crystal oscillator of 4 pin series connection of described chip; Ground connection behind resistance of 5 pin series connection of described chip; 6 pin of described chip and 7 pin T-Ring shape antennas; Described chip adopts the MICRF102 cake core.
The circuit structure of above-mentioned active radio receiver module is: the output of a reception antenna connects a voltage controlled oscillator F/V circuit through a wireless receiving circuit; The output of voltage controlled oscillator F/V circuit connects Surveillance center, and Surveillance center provides working power for wireless receiving circuit and voltage controlled oscillator F/V circuit.
The circuit structure of above-mentioned wireless receiving circuit is: 2 pin of a wireless data receiving chip connect antenna; 1 pin ground connection of described chip, 3 pin connect the vcc power supply, electric capacity of series connection between 1 pin and 3 pin, ground connection behind electric capacity of 4 pin series connection, 6 pin ground connection, ground connection behind electric capacity of 7 pin series connection, ground connection behind the 8 pin series connection crystal oscillator; Described chip 5 pin become the output of wireless receiving circuit, and described chip adopts the MLCRF007 cake core.
The circuit structure of above-mentioned voltage controlled oscillator F/V circuit is: the output line from wireless receiving circuit connects a resistance, this resistance end that links to each other with an electric capacity is drawn 6 pin that connect the voltage controlled oscillator chip input as this chip, ground connection after the 2 pin series resistances of described chip, 3 pin and 4 pin are ground connection all, resistance one a termination vcc power supply, ground connection after the other end and the capacitances in series, the described resistance end that links to each other with described electric capacity is drawn 5 pin that connect described chip, resistance one a termination vcc power supply, ground connection after the other end is connected with a resistance, described two resistance are drawn 7 pin that connect described chip with the end that links to each other, and 8 pin of described chip connect the vcc power supply; An electric capacity is in parallel with a resistance, an end ground connection, and 1 pin of the described chip of another termination is as the output connection Surveillance center of active radio receiver module; 1 pin of one 3 pin socket connects 1 pin of described chip, and 2 pin of described 3 pin sockets meet operating voltage vcc, 3 pin ground connection (being gnd).
Above-mentioned power circuit (5) is to obtain energy by current transformer, voltage stabilizing generation+5V power supply, to circuit (6) and circuit (7) power supply, voltage controlled oscillator V/F circuit (6) is the baseband signal that the magnitude of voltage of little induction by current is changed into certain frequency, the peripheral circuit of the linear relationship of voltage and frequency and voltage controlled oscillator chip is closely related, wireless transmission circuit (7) is that the baseband signal of certain frequency is launched by antenna through ASK modulation back, wireless receiving circuit (11) is that antenna receives the baseband signal that demodulates certain frequency behind the ASK signal, voltage controlled oscillator F/V circuit (12) is that the baseband signal of certain frequency is transformed back the correspondent voltage value, its linear relationship is the antilinear relation among the circuit A, and closely related with peripheral circuit.
The beneficial effects of the utility model are that current transformer self is a totally-enclosed module that does not have electric lead-out terminal, the wiring and the Insulation Problems that do not have common sensor lead to bring.Current transformer is realized the wireless transmission of current signal with the chip of several practicalities, and speed reaches 1000 pulses of per second, and receiving element can receive wireless signal and be reduced to voltage signal so that and microcomputer interface with interior the setting flexibly 2 meters of distances.The used wireless ISM band of the design need not application and can use.
Description of drawings
Fig. 1 is an electrical block diagram of the present utility model.
Fig. 2 is a schematic block circuit diagram of the present utility model.
Embodiment
Details are as follows for a preferred embodiment of the present utility model: referring to Fig. 1, the little electric current that is sleeved on the induction coil output of big ampere wires 1 is transformed into magnitude of voltage by current transformer 3, insert passive and wireless transmitter module 4 from input In1 and In2, generation+5V voltage and an input voltage Vi in power circuit 5, + 5V is as circuit 6,7 operating voltage, voltage Vi is via voltage controlled oscillator V/F circuit 6, wireless transmission circuit 7 is launched modulation signal by antenna 8, in active radio receiver module 9, antenna receives modulation signal after by wireless receiving circuit 11, voltage controlled oscillator F/V circuit 12), obtain Vout at output, circuit 11,12 operating voltage is provided by control centre 13.
Fig. 2 is the circuit theory diagrams of passive and wireless transmitter module 4 and active radio receiver module 9, and each circuit module main part is delimited by a dashed line.
In the passive and wireless transmitter module 4, form by power circuit 5, voltage controlled oscillator V/F circuit 6, wireless transmission circuit 7, input In1 connects rectification diode D1 positive pole, input In2 connects the negative pole and the ground connection of capacitor C 1, the positive level of the negative pole of D1, capacitor C 1 is joined with 1 pin of voltage-stabiliser tube J1, the 2 pin ground connection of J1, the output of 3 pin of J1+5V voltage is as the power supply of circuit 6,7.1 pin of slide rheostat R1 and 2 pin and capacitor C 1 two ends join, 3 pin of R1 are as input voltage Vi connecting resistance R2, ground connection after resistance R 2 is connected with capacitor C 3, the pin that R2 links to each other with C3 is drawn 7 pin that the meet voltage controlled oscillator V/F chip J2 voltage input signal as chip, 1 pin and 6 pin of J2 join, 1 pin of one termination J2 of capacitor C 5 and resistance R 11 parallel connections, other end ground connection, ground connection behind the 2 pin series resistance R7 of J2, the 4 pin ground connection of J2,5 pin of J2 are connected between pull-up resistor R9 and the capacitor C 7, resistance R 9 other end ground connection, the minus earth of capacitor C 7,8 pin of J2 connect+the 5V power supply, 3 pin of J2 are as the output signal Fout of certain frequency, connect 8 pin of wireless data transmission chip J4, capacitor C 2 is in parallel with resistance R 4, one end ground connection, connect behind the other end series resistance R12+the 5V power supply, R14 and the R4 end that joins is drawn 1 pin that meets wireless data transmission chip J4, capacitor C 4, the end ground connection that capacitor C 9 and capacitor C 10 are in parallel is also introduced 3 pin of J4, another in parallel termination+5V also introduces 2 pin of J4, because wireless data transmission chip J4 is higher to the stability requirement of power supply, ground connection behind the 4 pin series connection crystal oscillator Y1 of J4, ground connection behind the 5 pin series resistance R13 of J4,6 pin of J4 and 7 pin T-Ring shape antenna E1 are used to launch the modulation signal of ASK.
In the active radio receiver module 9, by wireless receiving circuit 11, voltage controlled oscillator F/V circuit 12 is formed, 2 pin of wireless data receiving chip J5 meet antenna E2, the signal that receives is as the input of chip J5, the 1 pin ground connection of J5,3 pin of J5 connect+5V, series capacitance C14 between 1 pin of J5 and 3 pin, ground connection behind the 4 pin series capacitance C11 of J5, the 6 pin ground connection of J5, ground connection behind the 7 pin series capacitance C13 of J5, ground connection behind the 8 pin series connection crystal oscillator Y2 of J5, resistance R 5 one terminations+5V, the other end and the 5 pin dataout that meet J5 after capacitor C 12 is connected, the R5 end that links to each other with C12 is drawn 6 pin that meet voltage controlled oscillator chip J3, input as chip J3, the baseband signal of input certain frequency, ground connection behind the 2 pin series resistance R8 of J3,3 pin of J3 and 4 pin are ground connection all, resistance R 10 1 terminations+5V, the other end back ground connection of connecting with capacitor C 8, the R10 end that links to each other with C8 is drawn 5 pin that meet J3, resistance R 6 one terminations+5V, the other end back ground connection of connecting with resistance R 16, the R6 end that links to each other with R16 is drawn 7 pin that meet J3, and 8 pin of J3 connect+5V, capacitor C 6 is in parallel with resistance R 14, one end ground connection, 1 pin of another termination J3 is as the output of whole module, the baseband signal corresponding voltage value Vout of output certain frequency, make input for Surveillance center, 1 pin of 3 pin socket J6 connects 1 pin of J3, and 2 pin of J6 meet operating voltage vcc, the 3 pin ground connection of J6,2 pin and 3 pin of J6 are inputs.
Current transformer structure with passive and wireless transfer function of the present utility model is comparatively simple, processing and fabricating can use shown in the by specification accompanying drawing, the model of the integrated circuit of being quoted in the circuit is respectively: J1 is 7805, J2 is LM331, L3 is LM331, J4 is MICRF102, and J5 is MICRF007, and other components and parts are universal standard electronic devices and components.
LM331 voltage controlled oscillator chip not only can be realized V/F but also can realize F/V that key is the periphery circuit design difference.The linear corresponding relation of V/F and F/V is consistent. and voltage Vin is value in 0 to+5V, and the frequency f out scope of generation is that 1Hz is to 100Hz.The linear corresponding relation fout=VinRs/ of Vin and fout (2.09RLRtCt), Rs=12kHz, RL=100kHz are selected in design of the present utility model, Rt=6.81kHz, Ct=0.01uF, thus the R7=12kHz in the circuit (B), R11=100kHz, R9=6.81kHz, C7=0.01uF, the R8=12kHz in the circuit (D), R14=100kHz, R10=6.81kHz, C8=0.01uF.
The MICRF102 chip is the quick remote-wireless data transmission of a monolithic UHF ASK/OOK chip of Micrel company.It has realized the data input, wireless output function.To the modulation of data ASK mode, the frequency range of wireless transmission is 300MHz～470MHz, and the purpose of selecting this chip for use is its fully-integrated UHF, but automatic antenna is tuning, message transmission rate reaches 20Kbps, the more important thing is that chip adopts the SOP-8 encapsulation, and ancillary equipment is the simplest.The utility model is set in 315MHz to the benchmark frequency of oscillation.So the frequency of oscillation of the crystal oscillator Y1 that pin 4 is external is 315/32=9.8437MHz, the 315MHz frequency should adopt the loop antenna E1 of inductance coefficent 44nH, the call parameter of antenna can be set at the long 71.501mm of being of antenna loop, the wide 1.778mm of antenna conductor, the power supply stability requirement height of MICRF102 chip, so use C9 between 2 pin and 3 pin, C4, C10 is as electrical power by-pass.
The MICRF007 chip is a monolithic UHF ASK/OOK superhet radio data receiving chip of Micrel company, and it has realized wireless input, the data output function. this chip also is the SOP-8 encapsulation, and ancillary equipment is also very simple.Receive frequency of oscillation fTX=315MHz, determine local oscillation frequency fLO=fTX ± (1.064fTX/390), so the frequency of oscillation of the external crystal oscillator Y2 of MICRF007 chip is fLO/64.5=4.8970MHz, the stability of power supply also needs external circuits C14 as bypass, and pin 4 external capacitor C11 are only for increasing input dynamic range.
Claims (8)
1. current transformer with passive and wireless transfer function, comprise an induction coil (2) that is set in big ampere wires (1), the output of induction coil (2) connects a current transformer (3), the output that it is characterized in that current transformer (3) connects a passive and wireless transmitter module (4), passive and wireless transmitter module (4) is launched signal by its transmitting antenna (8), an active radio receiver module (9) is by its reception antenna (10) received signal, and the output of active radio receiver module (9) connects Surveillance center (13).
2. the current transformer with passive and wireless transfer function according to claim 1, the circuit structure that it is characterized in that passive and wireless transmitter module (4) is: the input of a power circuit (5) connects the output of current transformer (3), and its output is connected a transmitting antenna (8) through a voltage controlled oscillator V/F circuit (6) with a wireless transmission circuit (7), and power circuit (5) also provides working power for voltage controlled oscillator V/F circuit (6) and wireless transmission circuit (7).
3. the current transformer with passive and wireless transfer function according to claim 2, the structure that it is characterized in that current circuit (5) is: an one output (In1) connects the positive pole of a rectifier diode (D1), the other end (In2) connects the negative pole and the ground connection of electric capacity (C1), the positive level of the negative pole of described diode (D1) and described electric capacity (C1) is joined with 1 pin of a voltage-stabiliser tube (J1), 2 pin ground connection of described voltage-stabiliser tube (J1), and its 3 pin output+5V voltage is voltage controlled oscillator V/F circuit (6) and wireless transmission circuit (7) power supply; The two ends of 1 pin of a slide rheostat (R1) and 2 pin and described electric capacity (C1) join, and 3 pin output voltage V i of its slip connect voltage controlled oscillator V/F circuit (6).
4. the current transformer with passive and wireless transfer function according to claim 2, the circuit structure that it is characterized in that voltage controlled oscillator V/F circuit (6) is: connect a resistance (R2) with power circuit (5) output voltage V i as input voltage, ground connection after this resistance (R2) is connected with an electric capacity (C3), described resistance (R2) is connected the voltage input signal of 7 pin of a voltage controlled oscillator V/F chip (J2) as this chip with the pin that the continuous pin of electric capacity (C3) is drawn, 1 pin and 6 pin of chip (J2) join, 1 pin of the described chip of a termination (J2) that electric capacity (C5) and a resistance (R11) are in parallel, and other end ground connection, 2 pin series resistances (R7) the back ground connection of described chip (J2), and 4 pin ground connection, 5 pin are connected between resistance (R9) and the electric capacity (C7), this resistance (R9) other end ground connection, the minus earth of this electric capacity (C7), 8 pin of described chip (J2) connect+the 5V power supply, and 3 pin are exported as the signal of voltage controlled oscillator V/F circuit (6) through a resistance (R3), and described chip adopts the LM331 cake core.
5. the current transformer with passive and wireless transfer function according to claim 2, the circuit structure that it is characterized in that wireless transmission circuit (7) is: 8 pin of a wireless data transmission chip (J4) connect the signal output of voltage controlled oscillator V/F circuit (6), an electric capacity (C2) is in parallel with a resistance (R4), one end ground connection, 1 pin of the described chip of another termination (J4), and connect+the 5V power supply after the series resistance (R12); After three electric capacity (C4, C9, C10) parallel connection, an end ground connection is also introduced 3 pin of described chip (J4), and another termination+5V power supply is also introduced 2 pin of described chip (J4); 4 pin crystal oscillators of series connection (Y1) the back ground connection of described chip (J4); 5 pin resistance of series connection (R13) the back ground connection of described chip (J4); 6 pin of described chip (J4) and 7 pin T-Ring shape antennas (E1, promptly 8); Described chip adopts the MICRF102 cake core.
6. the current transformer with passive antenna transfer function according to claim 1 is characterized in that the circuit structure of active radio receiver module (9) is: the output of a reception antenna (10) connects a voltage controlled oscillator F/V circuit (12) through a wireless receiving circuit (11); The output of voltage controlled oscillator F/V circuit (12) connects Surveillance center (13), and Surveillance center (13) provides working power for wireless receiving circuit (11) and voltage controlled oscillator F/V circuit (12).
7. the current transformer with passive antenna transfer function according to claim 6 is characterized in that the circuit structure of wireless receiving circuit (11) is: 2 pin of a wireless data receiving chip (J5) connect antenna (E2, promptly 10); 1 pin ground connection of described chip (J5), 3 pin connect the vcc power supply, a series connection electric capacity (C14) between 1 pin and 3 pin, 4 pin electric capacity of series connection (C11) back ground connection, 6 pin ground connection, 7 pin electric capacity of series connection (C13) back ground connection, 8 pin series connection crystal oscillators (Y2) back ground connection; Described chip (J5) 5 pin become the output (dataout) of wireless receiving circuit (11), and described chip (J5) adopts the MLCRF007 cake core.
8. the current transformer with passive antenna transfer function according to claim 6, the circuit structure that it is characterized in that voltage controlled oscillator F/V circuit (12) is: the output line from wireless receiving circuit (11) connects a resistance (R5), this resistance (R5) end that links to each other with an electric capacity (C12) is drawn 6 pin that connect voltage controlled oscillator chip (J3) input as this chip (J3), 2 pin series resistances (R8) the back ground connection of described chip (J3), 3 pin and 4 pin are ground connection all, a resistance (R10) termination vcc power supply, ground connection after the other end is connected with electric capacity (C8), described resistance (R10) end that links to each other with described electric capacity (C8) is drawn 5 pin that connect described chip (J3), a resistance (R6) termination vcc power supply, ground connection after the other end is connected with a resistance (R16), described two resistance (R6) end that links to each other with (R16) is drawn 7 pin that connect described chip (J3), and 8 pin of described chip (J3) connect the vcc power supply; An electric capacity (C6) is in parallel with a resistance (R14), an end ground connection, and 1 pin of the described chip of another termination (J3) is as the output connection Surveillance center (13) of active radio receiver module (9); 1 pin of one 3 pin socket (J6) connects 1 pin of described chip (J3), and 2 pin of described 3 pin sockets (J6) meet operating voltage vcc, 3 pin ground connection (being gnd).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114221 CN2754194Y (en) | 2004-12-15 | 2004-12-15 | Current mutual inductor with passive wireless transmission function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114221 CN2754194Y (en) | 2004-12-15 | 2004-12-15 | Current mutual inductor with passive wireless transmission function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2754194Y true CN2754194Y (en) | 2006-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420114221 Expired - Fee Related CN2754194Y (en) | 2004-12-15 | 2004-12-15 | Current mutual inductor with passive wireless transmission function |
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| CN (1) | CN2754194Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010005658A1 (en) * | 2008-06-16 | 2010-01-14 | General Electric Company | Wireless current transformer |
| CN102957220A (en) * | 2012-11-29 | 2013-03-06 | 南方电网科学研究院有限责任公司 | Non-contact power supply system of active current/voltage transformer |
| CN102967741A (en) * | 2012-11-20 | 2013-03-13 | 河南新月实业有限公司 | Voltage-type current transformer for data detection of high-voltage line |
| CN103903845A (en) * | 2012-12-26 | 2014-07-02 | 苏州工业园区新宏博通讯科技有限公司 | Passive wireless current transformer |
| CN103901267A (en) * | 2012-12-26 | 2014-07-02 | 苏州工业园区新宏博通讯科技有限公司 | Current signal wireless receiving type electric energy meter |
| CN110412432A (en) * | 2019-08-07 | 2019-11-05 | 国网福建省电力有限公司 | The coaxial leads structure and method of a kind of GIS partial discharge UHF signal to external radiation |
-
2004
- 2004-12-15 CN CN 200420114221 patent/CN2754194Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010005658A1 (en) * | 2008-06-16 | 2010-01-14 | General Electric Company | Wireless current transformer |
| CN102967741A (en) * | 2012-11-20 | 2013-03-13 | 河南新月实业有限公司 | Voltage-type current transformer for data detection of high-voltage line |
| CN102957220A (en) * | 2012-11-29 | 2013-03-06 | 南方电网科学研究院有限责任公司 | Non-contact power supply system of active current/voltage transformer |
| CN103903845A (en) * | 2012-12-26 | 2014-07-02 | 苏州工业园区新宏博通讯科技有限公司 | Passive wireless current transformer |
| CN103901267A (en) * | 2012-12-26 | 2014-07-02 | 苏州工业园区新宏博通讯科技有限公司 | Current signal wireless receiving type electric energy meter |
| CN110412432A (en) * | 2019-08-07 | 2019-11-05 | 国网福建省电力有限公司 | The coaxial leads structure and method of a kind of GIS partial discharge UHF signal to external radiation |
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| CF01 | Termination of patent right due to non-payment of annual fee |