CN202661536U - Wireless digital monitoring sensor for electrical equipment - Google Patents

Wireless digital monitoring sensor for electrical equipment Download PDF

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Publication number
CN202661536U
CN202661536U CN 201220328865 CN201220328865U CN202661536U CN 202661536 U CN202661536 U CN 202661536U CN 201220328865 CN201220328865 CN 201220328865 CN 201220328865 U CN201220328865 U CN 201220328865U CN 202661536 U CN202661536 U CN 202661536U
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Prior art keywords
circuit
monitoring sensor
wireless digital
digital monitoring
current
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CN 201220328865
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张景山
张世宣
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ANSHAN YINYU ELECTRONIC TECHNOLOGY Co Ltd
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ANSHAN YINYU ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a wireless digital monitoring sensor for electrical equipment. The wireless digital monitoring sensor comprises a shell, a singlechip circuit, a power and control circuit, a wireless communication circuit, a voltage detection circuit, a current detection circuit, a temperature detection circuit, a clock circuit, and a line detection circuit which are arranged in the shell and an antenna which is arranged outside the shell; and according to the wireless digital monitoring sensor, by using an electromagnetic field and a sensing component of the same space and a fuzzy control method, the conventional power failure and supply frequency, power failure and supply time, the current value, the voltage value and the relevant electric quantity parameters can be detected and recorded, and the common failures such as large-current ultralimit, phase fault, local temperature rise ultralimit, strong current intrusion, surge and thunderbolt of a power supply circuit and the electrical equipment can be detected simultaneously.

Description

Power equipment wireless digital monitoring sensor
Technical field
The utility model relates to the defeated modified line road of a kind of wireless type electric power on-line measuring device, in order to parameters such as the electric current in the detection line, voltage, temperature rise and cycle deviations, and the running status of monitoring power circuit.
Background technology
Along with developing rapidly of power construction, the continuous expansion of electrical network scale is carried out the important topic that remote monitoring also becomes a necessary solution to transmission line of electricity and power equipment correlation parameter.Particularly an intelligent multi-functional on-Line Monitor Device important component part in intelligent grid and the safe power supply link especially is the important technical that realizes safe operation, overhaul management, raising normal operation level.At present, in the prior art, developed multiple on-Line Monitor Device with simple function.Wherein typical technical scheme has: (one) Chinese patent (application number: CN200510047898.9), a kind of wireless type temperature-detecting device has been proposed, but this device can only solely detect local temperature rise's parameter of transmission line of electricity and power equipment, and can not detect other related electric parameter; (2) Chinese patent (application number: CN200610123199.2), proposed a kind of wireless type electrified display interlock apparatus, but this device can only detect transmission line of electricity and whether power equipment is in electriferous state, and can not detect other related electric parameter.In sum, lack a kind of comprehensive, multi-functional, intelligent on-Line Monitor Device in the existing technical scheme, therefore, can not satisfy actual scene operation needs.
The utility model content
The purpose of this utility model just provides a kind of power equipment wireless digital monitoring sensor comprehensive, multi-functional, intelligent, wireless type, can carry out on-line monitoring to the correlation parameter of power circuit and power equipment operation.This pick-up unit can utilize the electromagnetic field of the same space point and the sensitive components in the device, make stopping that this device can the detection record routine send electric number of times, stop electric power feeding time, current value, magnitude of voltage and relevant electrical parameter, can monitor simultaneously again the most common failure of supply line and power equipment, as large electric current transfinite, the generation of the event of failure such as phase fault, local temperature rise transfinite, forceful electric power intrusion, surge, thunderbolt.That a kind of structure is small and exquisite, wireless type numeral on-line monitoring sensor easy to install.
For achieving the above object, the utility model has adopted following technical scheme:
A kind of power equipment wireless digital monitoring sensor, by housing and be contained in single chip circuit, power supply and control circuit, wireless communication line, the voltage detecting circuit in the housing and be contained in the outer antenna of housing and consist of, it is characterized in that: also contain current detection circuit, line status testing circuit, temperature sensing circuit in this monitoring sensor, reach the clock circuit, described current detection circuit, line status testing circuit, temperature sensing circuit and clock circuit are connected with single chip circuit by data circuit respectively.
Further, described current detection circuit is by TMR magnetic field sensor induction detection line electric current.
Further, described line status testing circuit is made of coil, rectifying device and Resistor-Capacitor Unit.
Further, described temperature sensing circuit is made of digital integration temperature element (TE) and Resistor-Capacitor Unit thereof.
Further, described clock circuit is made of digital clock element and Resistor-Capacitor Unit thereof.
Compared with prior art, the utility model has the advantage of, utilize the testing circuit of the element design such as field effect, only utilize the electromagnetic field of a very little spatial point, just can the Real-Time Monitoring circuit stop sending electric situation, whether charged, can also detect electric pressure, the current loading size of high voltage alive equipment if not only can detect power equipment, the correlation parameters such as equipment temperature rise, and can detect the fault-signal such as short trouble, earth fault, excess current, superpotential of power circuit; The utility model adopts the AVR single-chip microcomputer to carry out the core processing data, and is equipped with the fuzzy mathematics algorithm, and it is fast to have processing signals speed, and collection signal is real-time, the accuracy high; This pick-up unit volume is small and exquisite, and it can be installed on the power equipment, and does not affect the use function of tested equipment; Another advantage of this pick-up unit is simple in structure, uses element few, thereby has reduced the manufacturing cost of device.
Description of drawings
Fig. 1 is the structural representation block diagram of power equipment wireless digital monitoring sensor.
Fig. 2 is the circuit theory diagrams of power equipment wireless digital monitoring sensor.
Fig. 3 is that the short trouble of power equipment wireless digital monitoring sensor is judged synoptic diagram.
Fig. 4 is that the earth fault of power equipment wireless digital monitoring sensor is judged synoptic diagram.
Fig. 5 is excess current, the superpotential fault verification synoptic diagram of power equipment wireless digital monitoring sensor.
Fig. 6 is that power equipment wireless digital monitoring sensor is installed in the work synoptic diagram on the high voltage bus.
Embodiment
Referring to Fig. 1, the structure of power equipment wireless digital monitoring sensor of the present utility model, by housing 2 and be contained in line status testing circuit 3, single chip circuit 4, power supply and control circuit 5, power circuit 6, data circuit 7, clock circuit 8, temperature sensing circuit 9, current detection circuit 10, voltage detecting circuit 11 and wireless communication module circuit 12 in the housing 2, be contained in housing 2 outer antennas 1 and consist of, its concrete structure is: this pick-up unit has a housing 2, and a PCB circuit board 13 is arranged in the inside of housing 2.On PCB circuit board 13, the element E of electric field induction is drawn in welding, i.e. Copper Foil induction electrode, also be shaped with line status testing circuit 3, single chip circuit 4, power supply and control circuit 5, power circuit 6, data circuit 7, clock circuit 8, temperature sensing circuit 9, current detection circuit 10, voltage detecting circuit 11 and wireless communication module circuit 12 and mutually between communication or the used circuit connection of power supply.At PCB circuit board 13 all elements that are welded with line status testing circuit 3, single chip circuit 4, power supply and control circuit 5, power circuit 6, data circuit 7, clock circuit 8, temperature sensing circuit 9, current detection circuit 10, voltage detecting circuit 11 and wireless communication module circuit 12 are installed.And antenna 1 and wireless communication module circuit 12 have been contained in the outside of housing 2 after being electrically connected.Wherein, line status testing circuit 3 is made of coil and Resistor-Capacitor Unit, single chip circuit 4, clock circuit 8, temperature sensing circuit 9, current detection circuit 10, voltage detecting circuit 11 and wireless communication module circuit 12 are made of digital integrated circuit device and Resistor-Capacitor Unit thereof, and power supply and control circuit 15 are made of photoelectric device and Resistor-Capacitor Unit thereof.
Power equipment wireless digital monitoring sensor electrical schematic diagram of the present utility model as shown in Figure 2.
In Fig. 2, line status testing circuit 3 is by inductance component L 1, resistive element R1~R6, and diode D1~D3, transistor Q1 consists of; Single chip circuit 4 is by single-chip microcomputer U3(ATMEGA48V), resistive element R25, capacity cell C15~C17, crystal oscillator element XTAL2 and LED consist of; Power supply and control circuit 5 be by U6, U7, and U8, electric battery BT2, resistive element R13 and R24, capacity cell C9~C14, diode D4 consists of, and wherein U6 is photoelectric device AQY212EH, and U7, U8 are MC54HC4066; Clock circuit 8 is by U1, resistive element R7~R9, and crystal oscillator element XTAL1, electric battery BT1 consists of, and wherein U1 is DS1302; Temperature sensing circuit 9 is made of U5 and resistive element R14, and wherein U5 is DS18B20; Current detection circuit 10 is by U4, operational amplifier OP1, and resistive element R23, capacity cell C6~C8 consists of, and wherein, U4 is magnetic field induction device MMLP57H; Voltage detecting circuit 11 is by field effect transistor Q2, transistor Q3, and resistive element R21~R22, potentiometer POT1 consists of; Wireless communication line 12 is by U9, resistive element R16~R22, and inductance component L 2~L6, capacity cell C18~C30, crystal oscillator element XTAL3 consists of, and wherein, U9 is communication device CC1100.
The course of work of power equipment wireless digital monitoring sensor of the present utility model is such:
1). detection power equipment of the present utility model stops sending electricity and record to stop sending electricity circuit constantly, sees voltage detecting circuit 11.Adjust potentiometer POT1, make Vbe<0.5V of transistor Q3, externally under the effect of electric field, the 3 pin voltages of field effect transistor Q2 raise, so that transistor Q3 conducting, i.e. the pin of single-chip microcomputer U3 interruption PC2 level changes low level into by high level, and single-chip microcomputer detects the charged electric power apparatus of demarcating this moment, in like manner when the level that interrupts pin became high level by low level, it is not charged that single-chip microcomputer detects the power equipment of demarcating this moment; In the circuit of the present utility model clock chip is housed, single-chip microcomputer can record the moment that stops sending electricity.
2). the circuit of detection line electric current of the present utility model, see current detection circuit 10.At first, external electrical field acts on the magnetic field induction device U4, make its cutting magnetic line, it produces the MV signal of I/V characteristic, and this signal is linear change, after operational amplifier OP1 amplification, pass through power management module again, be input on the A/D6 pin of single-chip microcomputer U3, single-chip microcomputer U3 calculates Uadc6, by look-up table, calculate size of current again; The combined circuit state detection circuit 3 again, and its external electrical field acts on the inductance component L 1, after diode D1 rectification, divide to be depressed on the A/D7 pin of single-chip microcomputer U3, calculate the induced voltage size, by I=U/R, extrapolate size of current again; The said two devices electric current draws the electric current of convergence actual track after single-chip microcomputer calculates.
3). the method for detection line voltage of the present utility model, see voltage detecting circuit 11.External electrical field acts on the induction electrode E, the electric field signal of field effect transistor Q2 input E, and in the certain voltage scope, the voltage of 3 pin on the field effect transistor Q2 is that 0-3V changes, it inputs on the A/D2 pin of single-chip microcomputer U3, calculates voltage swing.
4). the utility model detects the circuit of feeder line fault, sees line status testing circuit 3.External electrical field acts on the inductance component L 1, and induction electromotive force acts on the capacity cell C4 after the diode D1 rectification through resistive element R1.When electric current was steady in the line, transistor Q1 was in cut-off state, and the outer interruption pin INT0 of single-chip microcomputer U3 is high level; In case when in the circuit current break being arranged, the rapid conducting of transistor Q1, single-chip microcomputer interrupts pin INT0 outward and becomes low level, the single-chip microcomputer response is interrupted, utilize simultaneously the A/D conversion, read through resistive element R2, R4, the line voltage distribution of R5 dividing potential drop, calculate current break △ I, and utilize clock chip and onboard clock software to calculate mutation time △ t and △ T, judge the electriferous state that reads circuit, whether superpotential, excess current, ground connection, short trouble occur thereby utilize the built-in mathematics computing model of single-chip microcomputer to judge circuit, and the moment that can record trouble occurs.
4.1). power equipment wireless digital monitoring sensor of the present utility model, the i-v curve of the fault that is short-circuited in the judgement power circuit, as shown in Figure 3.Circuit has current time t1〉Kt, forward current mutation rate △ I/ △ t〉Kc, the time of electric current vanishing is Ka<△ T<Kb in the circuit, the circuit fault that is short-circuited then, wherein Kt, Kc, Ka, Kb are empirical constant.
4.2). power equipment wireless digital monitoring sensor of the present utility model, judge the i-v curve that earth fault occurs in the power circuit, as shown in Figure 4.Voltage is arranged in circuit, and electric current t1 Kh, and forward current mutation rate △ I/ △ t〉Kj, voltage drop △ U/U in the circuit〉Km, in the circuit within a period of time the non-vanishing Kn of current/voltage<△ T, circuit generation earth fault then, wherein Kh, Kj, Km, Kn are empirical parameter.
4.3). power equipment wireless digital monitoring sensor of the present utility model, judge excess current and superpotential i-v curve occur in the power circuit, as shown in Figure 5.Utilize in the line the method that detects electric current and voltage, as electric current positive change value △ I〉Ki, as voltage positive change value △ U〉Ku, and transformation period △ t Ks, can judge circuit generation excess current or superpotential phenomenon, wherein Ki, Ku, Ks are empirical parameter.
4.4). power equipment wireless digital monitoring sensor of the present utility model, the method for forceful electric power intrusion in the judgement power circuit, surge and thunderbolt is the method for utilizing undergo mutation in the detection line electric current and mutation voltage.As electric current positive change value △ I〉Kp, transient voltage positive change value △ U〉Kw, and transformation period △ t<Kz, in conjunction with the built-in classical mathematics pattern of single-chip microcomputer, can judge the intrusion of circuit generation forceful electric power, surge and thunderbolt phenomenon, wherein Kp, Kw, Kz are empirical parameter.
5). power equipment wireless digital monitoring sensor of the present utility model, judge temperature change value in the circuit, utilize U5 to carry out.U5 is digital temperature sensor spare, in conjunction with the electric current that single-chip microcomputer U3 calculates, utilizes the built-in mathematical model of single-chip microcomputer, drafting time, electric current, temperature rise change curve.
6). the mounting means of power equipment wireless digital monitoring sensor of the present utility model is as shown in Figure 6.In Fig. 6,1 is the sensor after the encapsulation of the utility model product, and 2 is high-voltage busbar or wire, and 3 is radio receiver.4 is the fieldbus of receiving trap.During sensor 1 work, regularly send the whether charged and relevant isoparametric wireless signal of voltage, electric current of high-voltage busbar or wire 2, after receiving trap is received the electriferous state signal and other parameter signal of wireless transmission, utilize the means prompting operating personnel such as acoustic-optic indicator, inform present operation conditions and the operational factor of tested equipment.

Claims (5)

1. power equipment wireless digital monitoring sensor, by housing and be contained in single chip circuit, power supply and control circuit, wireless communication line, the voltage detecting circuit in the housing and be contained in the outer antenna of housing and consist of, it is characterized in that: also contain current detection circuit, line status testing circuit, temperature sensing circuit in this monitoring sensor, reach the clock circuit, described current detection circuit, line status testing circuit, temperature sensing circuit and clock circuit are connected with single chip circuit by data circuit respectively.
2. high voltage electric power equip ment wireless digital monitoring sensor according to claim 1, it is characterized in that: described current detection circuit is by magnetic field induction device U4, operational amplifier OP1, resistive element R23, capacity cell C6~C8 consists of.
3. high voltage electric power equip ment wireless digital monitoring sensor according to claim 1, it is characterized in that: described line status testing circuit is by inductance component L 1, resistive element R1~R6, diode D1~D3, transistor Q1 consists of.
4. high voltage electric power equip ment wireless digital monitoring sensor according to claim 1, it is characterized in that: described temperature sensing circuit is made of digital integration temperature element (TE) U5 and resistive element R14.
5. high voltage electric power equip ment wireless digital monitoring sensor according to claim 1, it is characterized in that: described clock circuit is by digital clock element U1, resistive element R7~R9, crystal oscillator element XTAL1, electric battery BT1 consists of.
CN 201220328865 2012-07-05 2012-07-05 Wireless digital monitoring sensor for electrical equipment Active CN202661536U (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102735289A (en) * 2012-07-05 2012-10-17 鞍山银宇电子科技有限公司 Wireless digital monitoring sensor for electrical equipment
CN104065385A (en) * 2013-03-20 2014-09-24 凌通科技股份有限公司 Signal decoding circuit applied to wireless charging or radio frequency identification system
CN104330724A (en) * 2014-02-18 2015-02-04 国家电网公司 10 KV switch cabinet residual switch times detection method and detection device
CN110940892A (en) * 2019-12-13 2020-03-31 西安锐驰电器有限公司 Equipment line fault detection system and method
CN112327683A (en) * 2020-10-23 2021-02-05 深圳市豪恩安全科技有限公司 Sensor load matching system and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102735289A (en) * 2012-07-05 2012-10-17 鞍山银宇电子科技有限公司 Wireless digital monitoring sensor for electrical equipment
CN104065385A (en) * 2013-03-20 2014-09-24 凌通科技股份有限公司 Signal decoding circuit applied to wireless charging or radio frequency identification system
CN104065385B (en) * 2013-03-20 2017-11-17 凌通科技股份有限公司 Applied to wireless charging or the signal decoding circuit of radio-frequency recognition system
CN104330724A (en) * 2014-02-18 2015-02-04 国家电网公司 10 KV switch cabinet residual switch times detection method and detection device
CN110940892A (en) * 2019-12-13 2020-03-31 西安锐驰电器有限公司 Equipment line fault detection system and method
CN112327683A (en) * 2020-10-23 2021-02-05 深圳市豪恩安全科技有限公司 Sensor load matching system and method

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