CN206523234U - A kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device - Google Patents
A kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device Download PDFInfo
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Abstract
The utility model is related to a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device, including data acquisition module, data processing module, data server and man-machine interface, every high-voltage board insulating contact one data acquisition module of correspondence, each data acquisition module includes 6 infrared temperature sensors, 3 current transformers, temperature signal regulation unit, current signal conditioning unit, data acquisition MCU units and data acquisition wireless transmit/receive units, it is connected after 6 corresponding high voltage distribution installation insulating contact temperature informations of infrared temperature sensor collection with corresponding temperature signal regulation unit, data acquisition MCU units are communicated by data collection radio Transmit-Receive Unit and data processing module, data processing module carries out digital filtering to the information of reception, communication, analysis and judgement, the data server of Surveillance center is transferred data to by Ethernet again, man-machine interface is connected with data server.
Description
Technical field
The utility model is related to a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device, it is adaptable to which power system is high
Compress switch in cabinet, measure the temperature and electric current of high-voltage board insulating contact, realize to insulating contact on-line temperature monitoring and current-carrying event
The early warning of barrier.
Background technology
High-tension switch cabinet is one of visual plant of power supply system, is responsible for dual for distribution and relay protection
Business, its working condition directly affects the safety and reliability of power supply.Due to high-tension switch cabinet isolation switch contact in operation
It can be influenceed by reasons such as mechanical oscillation, contact ablation, current overloads so that contact conditions deteriorate, contact point temperature
Rise, causes the local melting welding of contact or produces electric spark, ultimately cause device damage, or even cause power outage.In recent years
Insulating contact temperature faults take place frequently life in National Power System intermediate frequency.Therefore, in order to improve power supply reliability, it is ensured that power supply peace
Entirely, it is to avoid the generation of major accident caused by contact temperature rise, it is badly in need of a kind of effective high-voltage board insulating contact temperature online prison
Survey prior-warning device.
In recent years, high-tension switch cabinet insulating contact current-carrying failure has caused the highest attention of this area scholars, it is proposed that
Many monitoring systems, but also there are problems that at present.Switch cubicle insulating contact is in high voltage, the closed environment of high-intensity magnetic field
In, be not suitable for using traditional contact temperature-measuring mode, domestic and international contactless temperature-measuring is main based on infrared measurement of temperature.Small measurement
The infrared temperature sensor at visual angle is higher equipped with optical lens price, easily affected by environment, low with respect to cost performance, it is impossible to obtain wide
General application；Common infrared temperature sensor measurement visual angle is larger, it is impossible to monitor contact temperature.Have in surrounding environment
Powerful power frequency electromagnet interference, adversely effecting temp measurement.In temperature data processing, there is no temperature-compensating computing, only make
The state of temperature of insulating contact is reacted with rough measurement result, fault pre-alarming situation is embodied with single temperature value, these
High-voltage board insulating contact temperature monitoring and fault pre-alarming function can not be all realized exactly.
Utility model content
It is big to insulating contact thermometric error, easily inaccurate by strong electromagnetic and system early warning based on infrared sensor
The problem of, the utility model provides a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device, can effectively, exactly
Realize Temperature Monitoring of Isolators in HV Switchgear and fault pre-alarming function.
To reach above-mentioned purpose, the technical scheme that the utility model is provided is：
A kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device, including data acquisition module, data processing module,
Data server and man-machine interface, every high-voltage board insulating contact one data acquisition module of correspondence, each data acquisition module
Adopted including 6 infrared temperature sensors, 3 current transformers, temperature signal regulation unit, current signal conditioning unit, data
Collect MCU units and data acquisition wireless transmit/receive units, the corresponding high voltage distribution installation isolation of 6 infrared temperature sensor collections is touched
It is connected after head temperature information with corresponding temperature signal regulation unit, the corresponding high voltage power distribution dress of 3 current transformer collections
Put after the current information of insulating contact and to be connected with corresponding current signal conditioning unit, temperature signal regulation unit and electric current letter
Number conditioning unit is connected with data acquisition MCU units, and data acquisition MCU units pass through data collection radio Transmit-Receive Unit and number
Communicated according to processing module, data processing module carries out digital filtering, communication, analysis and judgement to the information of reception, then by with
Too net transfers data to the data server of Surveillance center, and man-machine interface is connected with data server, is checked by display screen
Every high-voltage board insulating contact state of temperature.
It is mono- that data processing module described in the utility model includes data processing wireless transmit/receive units, data processing MCU
Member, communication interface unit and host computer, data processing wireless transmit/receive units are received after the information of data collection radio Transmit-Receive Unit
Data processing MCU units are transmitted information to, data processing MCU units transmit data with communication interface unit by duplex communication
With instruction, communication interface unit transmits data command with host computer by duplex communication.
Infrared temperature sensor described in the utility model is made up of TPS334 infrared detectors and Fresnel lenses, by phenanthrene
Nie Er eyeglasses are as the condenser lens of TPS334 infrared detectors, and measurement distance ratio is 12:1, away from TPS334 infrared detectors
Window 14mm, TPS334 infrared detector is on the perpendicular bisector of Fresnel lenses, and infrared ray is focused on by Fresnel lenses
Original 60 ° measurement visual angles are changed into 5 ° by the interior window of TPS334 infrared detectors, realize point measurement visual angle.
The circuit of temperature signal regulation unit described in the utility model is：Infrared temperature sensor U5 output two-way letters
Number：V1, V2 and V3, V4, V2 and V4 ground connection, V1 is target temperature signal, first by resistance R1, R2, R3, R4, R5, R6,
Enter amplifying circuit after two passive double-t filter circuits of R7, R8, R9, R10 and electric capacity C1, C2, C3, C4, C5, C6 composition,
Effect through pull-up resistor R14, R15 and R16, makes signal voltage between 0~3V, then by resistance R25, R26, R27, R28,
R29 and electric capacity C18, C19, C20 composition passive a double-t filter circuit and resistance R30, R31, electric capacity C21, C22, C23 and
Amplifier U4 constitutes a second-order active power filter circuit, removes power frequency and high-frequency signal, makes signal voltage between 0~3V, mesh
Mark the output voltage VO 1 of temperature modulate circuit；V3 is ambient temperature signal, first signal pull-up voltage on pull-up resistor R17, then
Passive a double-t filter circuit and resistance being made up of resistance R18, R19, R20, R21, R22 and electric capacity C12, C13, C24
R23, R24, electric capacity C15, C16, C17 and amplifier U3 constitute a second-order active power filter circuit, remove power frequency and high frequency letter
Number, make signal voltage between 0~3V, the output voltage VO 2 of environment temperature modulate circuit.Output voltage VO 1, output voltage
In VO2 and power supply ± 5V and ground wire access terminal block P1.
The circuit of current signal conditioning unit described in the utility model is：Current signal takes by current transformer U6
Its voltage, passes through the active of resistance R32, R33, R35, potentiometer R36, electric capacity C24, C25, C26, C27 and amplifier U7 composition
Second-order filter amplifying circuit, the effect through pull-up resistor R37, R38 and R39 makes signal voltage between 0~3V, then by putting
The photoelectric coupled circuit of big device U8, U10 and precision photoelectric coupler U9 composition, realizes signal filtering and voltage isolation, then passes through electricity
Press the output voltage VO 3 of follower U11 output current modulate circuits.
Data acquisition MCU units described in the utility model, the circuit of data collection radio Transmit-Receive Unit are：Data acquisition
MCU units include SOC type C8051F020 single-chip microcomputers U12, reset circuit, JTAG emulators U14 and phase inverter U15,
C8051F020 single-chip microcomputers U12 uses passive crystal oscillator Y1, its I/O mouthfuls of P4.0, P4.1, P4.2, P4.3, P4.4, P4.5, P5.0,
P5.1 and P5.2 and data collection radio transceiver module U13 ports CSN, CSK, MOSI, MISO, AM, CD, TRX_CE, PWR_UP
With TX_EN connections, its I/O mouthfuls of P2.5 is connected with phase inverter U15, and phase inverter U15 is connected with radio receiving transmitting module U13 port DR,
Realize the communication with radio receiving transmitting module；C8051F020 single-chip microcomputers U12 jtag port TMS, TCK, TDI and TDO and JTAG
Emulator U14 TMS, TCK, TDI and TDO connection, realizes burning program function；C8051F020 single-chip microcomputers U12 reset connects
The reset circuit interface RST that mouth RST and button SW1, diode D3, electric capacity C48, electrochemical capacitor C49 and resistance R55 are constituted connects
Connect, electricity and button reset function in realization；Totally 16 tunnels lead to the AD conversion AIN0 that C8051F020 single-chip microcomputers U12 is carried and AIN1
Road, output voltage signal, the output voltage signal and electric current of environment temperature modulate circuit respectively with target temperature modulate circuit
The output voltage signal connection of modulate circuit, data acquisition MCU unit gathers 6 insulating contact temperature signals, 6 infrared
Temperature sensor own temperature signal and 3 touches head current signal, uses 15 tunnel AD conversion passages.
Data processing wireless transmit/receive units described in the utility model, data processing MCU units and communication interface unit
Circuit is：Data processing MCU units include SOC type C8051F020 single-chip microcomputers U20, reset circuit, JTAG emulators U23 and anti-
Phase device U22, C8051F020 single-chip microcomputer U20 uses passive crystal oscillator Y2, its I/O mouthfuls of P4.0, P4.1, P4.2, P4.3, P4.4,
P4.5, P5.0, P5.1 and P5.2 and data processing radio receiving transmitting module U21 ports CSN, CSK, MOSI, MISO, AM, CD, TRX_
CE, PWR_UP and TX_EN are connected, and its I/O mouthfuls of P2.5 is connected with phase inverter U22, phase inverter U22 and data processing wireless receiving and dispatching
Module U21 port DR connections, realize the communication with data processing radio receiving transmitting module；C8051F020 single-chip microcomputers U20 JTAG
Port TMS, TCK, TDI and TDO are connected with JTAG emulators U23 TMS, TCK, TDI and TDO, realize burning program function；
C8051F020 single-chip microcomputers U20 reseting interface RST and button SW2, diode D4, electric capacity C59, electrochemical capacitor C60 and resistance
Electricity and button reset function, the interface end of communication interface unit circuit in the reset circuit interface RST connections of R58 compositions, realization
RX, TX and DE are connected with P0.6, P0.7 and P2.0 of data processing MCU unit C8051F020 single-chip microcomputers, pass through photoelectricity coupling respectively
Clutch U16, U17 and U18, play light-coupled isolation, by MAX485 chip U19, divide through pull-up resistor R50, R51 and R52
After pressure, two-phase voltage-stabiliser tube D1, D2 and anti-thunder tube GS1, GS2, GS3 are incorporated to, prevents overvoltage from destroying circuit board, outputting communication interface
Cell data transmission end A and B is connected with host computer COM.
The utility model uses above-mentioned technical proposal, utilizes cheap TPS334 infrared detectors and Fresnel lenses
The infrared temperature sensor of composition is to insulating contact temperature survey, it is ensured that the electrical safety of device；Double T power frequency filter circuits subtract
The strong-electromagnetic field interference in small space；Signal lead is reduced using wireless communication technique；By measuring infrared temperature sensor
Own temperature, standard compensation formula has been obtained using experiment, carries out temperature-compensating computing to contact temperature, it is ensured that measurement temperature
Accuracy；Electric current, temperature and time real-time three-dimensional state diagram are set up, the thermal characteristics of contact temperature is analyzed, accurate event is made
Hinder early warning.The system is with low cost, simple in construction, strong antijamming capability, safe and reliable, measurement accuracy is high, diagnosis efficiency is high, pre-
It is alert accurate, power system high-tension switch cabinet insulating contact is applicable not only to, and other high-tension electricity device temperatures are monitored
There is use value, it is with a wide range of applications.
Brief description of the drawings
Fig. 1 high-voltage board insulating contact on-line temperature monitoring prior-warning device structured flowcharts；
Fig. 2 data acquisition module structured flowcharts；
Fig. 3 data processing module structured flowcharts；
Fig. 4 infrared sensor schematic diagrames；
Fig. 5 temperature signal regulation element circuit figures；
Fig. 6 current signals nurse one's health power circuit diagram；
Fig. 7 data acquisition MCU units and data collection radio Transmit-Receive Unit circuit diagram；
Fig. 8 data processings wireless transmit/receive units, data processing MCU units and communication interface unit circuit figure；
Fig. 9 temperature-compensating standard curves.
Embodiment
Embodiment 1
Such as Fig. 1, a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device, including at data acquisition module 2, data
Reason module 3, data server 4 and man-machine interface 5, every one data acquisition module 2 of correspondence of high-voltage board insulating contact 1, each
Data acquisition module 2 includes 6 infrared temperature sensors 6,3 current transformers 7, temperature signal regulation unit 8, current signals
Conditioning unit 9,11,6 collection of infrared temperature sensor 6 institutes of data acquisition MCU units 10 and data acquisition wireless transmit/receive units
It is connected after the temperature information of correspondence high voltage distribution installation insulating contact 1 with corresponding temperature signal regulation unit 8,3 electric currents are mutual
Sensor 7 is connected after gathering the current information of corresponding high voltage distribution installation insulating contact 1 with corresponding current signal conditioning unit 9
Connect, temperature signal regulation unit 8 and current signal conditioning unit 9 are connected with data acquisition MCU units 10, data acquisition MCU
Unit 10 is communicated by data collection radio Transmit-Receive Unit 11 with data processing module 3, the information of 3 pairs of receptions of data processing module
Digital filtering, communication, analysis and judgement are carried out, then transfers data to by Ethernet the data server 4 of Surveillance center, people
Machine interface 5 is connected with data server 4, and every high-voltage board insulating contact state of temperature is checked by display screen.
Such as Fig. 2, data acquisition module includes infrared temperature sensor, current transformer, temperature signal regulation unit, electric current
Signal condition unit, data acquisition MCU units and data acquisition wireless transmit/receive units, 6 are used for 6 insulating contacts of high-voltage board
Individual infrared temperature sensor measures its temperature, using 3 current transformers three-phase current is measured.
Such as Fig. 3, data processing module includes data processing wireless transmit/receive units, data processing MCU units, communication interface list
Data information transfer is given data processing MCU units by member and host computer, data processing wireless transmit/receive units, and data processing MCU is mono-
Member transmits data and instruction with communication interface unit by duplex communication, and communication interface unit is passed with host computer by duplex communication
Transmission of data is instructed.
Such as Fig. 4, infrared temperature sensor is made up of TPS334 infrared detectors and Fresnel lenses, Fresnel lenses is made
For the condenser lens of TPS334 infrared detectors, measurement distance ratio is 12:1, away from window 14mm in TPS334 infrared detectors,
TPS334 infrared detectors are on the perpendicular bisector of Fresnel lenses, and infrared ray focuses on the infrared spies of TPS334 by Fresnel lenses
The interior window of device is surveyed, original 60 ° measurement visual angles are changed into 5 °, point measurement visual angle is realized.
As shown in figure 5, infrared temperature sensor U5 exports two paths of signals：V1, V2 and V3, V4, V2 and V4 are grounded, and V1 is
Target temperature signal, first by resistance R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 and electric capacity C1, C2, C3, C4, C5,
Enter amplifying circuit after two passive double-t filter circuits of C6 compositions, the effect through pull-up resistor R14, R15 and R16 makes signal
Voltage is between 0~3V, then one be made up of resistance R25, R26, R27, R28, R29 and electric capacity C18, C19, C20 is passive
Double T filter circuits and resistance R30, R31, electric capacity C21, C22, C23 and amplifier U4 constitute a second-order active power filter circuit,
Power frequency and high-frequency signal are removed, makes signal voltage between 0~3V, the output voltage VO 1 of target temperature modulate circuit；V3 is ring
Border temperature signal, first the signal pull-up voltage on pull-up resistor R17, then pass through resistance R18, R19, R20, R21, R22 and electric capacity
Passive pair of T filter circuit and resistance R23, R24, electric capacity C15, C16, C17 and amplifier U3 for C12, C13, C24 composition
A second-order active power filter circuit is constituted, power frequency and high-frequency signal is removed, makes signal voltage between 0~3V, environment temperature is adjusted
Manage the output voltage VO 2 of circuit.Output voltage VO 1, output voltage VO 2 and power supply ± 5V and ground wire access terminal block P1
In.
As shown in fig. 6, current signal takes its voltage by current transformer U6, pass through resistance R32, R33, R35, current potential
Device R36, electric capacity C24, C25, C26, C27 and amplifier U7 composition active second-order filter amplifying circuit, through pull-up resistor R37,
R38 and R39 effect, makes signal voltage between 0~3V, then is made up of amplifier U8, U10 and precision photoelectric coupler U9
Photoelectric coupled circuit, realize signal filtering and voltage isolation, then pass through the output of voltage follower U11 output current modulate circuits
Voltage VO3.
As shown in fig. 7, data acquisition MCU units include SOC type C8051F020 single-chip microcomputers U12, reset circuit, JTAG is imitated
True device U14 and phase inverter U15.C8051F020 single-chip microcomputers U12 uses passive crystal oscillator Y1, its I/O mouthfuls of P4.0, P4.1, P4.2,
P4.3, P4.4, P4.5, P5.0, P5.1 and P5.2 and data collection radio transceiver module U13 port CSN, CSK, MOSI, MISO,
AM, CD, TRX_CE, PWR_UP and TX_EN are connected, and its I/O mouthfuls of P2.5 is connected with phase inverter U15, phase inverter U15 and wireless receipts
Module U13 port DR connections are sent out, the communication with radio receiving transmitting module is realized；C8051F020 single-chip microcomputers U12 JTAG ports
TMS, TCK, TDI and TDO are connected with JTAG emulators U14 TMS, TCK, TDI and TDO, realize burning program function；
C8051F020 single-chip microcomputers U12 reseting interface RST and button SW1, diode D3, electric capacity C48, electrochemical capacitor C49 and resistance
Electricity and button reset function in the reset circuit interface RST connections of R55 compositions, realization；C8051F020 single-chip microcomputers U12 is carried
AD conversion AIN0 and AIN1 totally 16 paths, output voltage signal respectively with target temperature modulate circuit, environment temperature conditioning
The output voltage signal connection of the output voltage signal and current regulating circuit of circuit, a data acquisition MCU unit gathers 6
Insulating contact temperature signal, 6 infrared temperature sensor own temperature signals and 3 touch head current signal, are turned using 15 road AD
Change passage.
As shown in figure 8, data processing wireless transmit/receive units 12, data processing MCU units 13 and communication interface unit 14
Circuit is：Data processing MCU units 13 include SOC type C8051F020 single-chip microcomputers U20, reset circuit, JTAG emulators U23 and
Phase inverter U22.C8051F020 single-chip microcomputers U20 uses passive crystal oscillator Y2, its I/O mouthfuls of P4.0, P4.1, P4.2, P4.3, P4.4,
P4.5, P5.0, P5.1 and P5.2 and data processing radio receiving transmitting module U21 ports CSN, CSK, MOSI, MISO, AM, CD, TRX_
CE, PWR_UP and TX_EN are connected, and its I/O mouthfuls of P2.5 is connected with phase inverter U22, phase inverter U22 and data processing wireless receiving and dispatching
Module U21 port DR connections, realize the communication with data processing radio receiving transmitting module；C8051F020 single-chip microcomputers U20 JTAG
Port TMS, TCK, TDI and TDO are connected with JTAG emulators U23 TMS, TCK, TDI and TDO, realize burning program function；
C8051F020 single-chip microcomputers U20 reseting interface RST and button SW2, diode D4, electric capacity C59, electrochemical capacitor C60 and resistance
Electricity and button reset function in the reset circuit interface RST connections of R58 compositions, realization.The interface of the circuit of communication interface unit 14
RX, TX and DE are connected with P0.6, P0.7 and P2.0 of data processing MCU unit C8051F020 single-chip microcomputers at end, pass through light respectively
Electric coupler U16, U17 and U18, play light-coupled isolation, by MAX485 chip U19, through pull-up resistor R50, R51 and
After R52 partial pressures, two-phase voltage-stabiliser tube D1, D2 and anti-thunder tube GS1, GS2, GS3 are incorporated to, prevents overvoltage from destroying circuit board, output is logical
Communication interface cell data transmission end A and B is connected with host computer COM.
As shown in figure 9, signal compensates computing to temperature signal first after entering host computer, because target temperature is main
It is to be influenceed by environment temperature, is represented by with its correlation：
U=k σ ε f (T)-k σ ε f (T0)
In formula：T is target temperature, and T0 is environment temperature, and k is constant, σ be Stefan-Boltzmann constant 5.67 ×
10-8W/(m2·K4), ε is the radiance of body surface.System has selected 25 DEG C of reference ambient temperatures as temperature-compensating, adopts
Collect lot of experimental data, in reference ambient temperature, fit the standard curve of a target temperature and output voltage.When
When under other environment temperatures, it is first determined with reference ambient temperature difference △ T0, then calculate △ fT0, substitute into and standard be determined
With reference in formula, by known output voltage, target temperature just can be calculated, temperature-compensating is realized.Host computer is to temperature, electric current
Analyzed with time signal, make corresponding early warning processing.
In man-machine interface, it is divided into three partial fault early warning columns, each contact temperature, electric current and the real-time three-dimensional shape of time
State figure, data query column.Fault pre-alarming column to failure from being normally divided into green, blue, orange, red four early warning stages.Data query column
The inquiry of historical data, three-dimensional data analysis statistical tables and reports, contact health status form, failure and maintenance note in its tab
Record, can online or print check.Temperature, electric current and the time three-dimensional state figure of contact can intuitively find out contact state,
Improve diagnosis early warning accuracy.
Claims (7)
1. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device, including data acquisition module (2), data processing module
(3), data server (4) and man-machine interface (5), every high-voltage board insulating contact (1) one data acquisition module (2) of correspondence,
Each data acquisition module (2) includes 6 infrared temperature sensors (6), 3 current transformers (7), temperature signal regulation units
(8), current signal conditioning unit (9), data acquisition MCU units (10) and data acquisition wireless transmit/receive units (11), 6 infrared
With corresponding temperature signal regulation after corresponding high voltage distribution installation insulating contact (1) temperature information of temperature sensor (6) collection
Unit (8) is connected, after the current information of the corresponding high voltage distribution installation insulating contact (1) of 3 current transformers (7) collection with
Corresponding current signal conditioning unit (9) is connected, temperature signal regulation unit (8) and current signal conditioning unit (9) and number
It is connected according to collection MCU units (10), data acquisition MCU units (10) pass through data collection radio Transmit-Receive Unit (11) and data
Processing module (3) is communicated, and data processing module (3) carries out digital filtering, communication, analysis to the information of reception and judged, then leads to
The data server (4) that Ethernet transfers data to Surveillance center is crossed, man-machine interface (5) is connected with data server (4), led to
Cross display screen and check every high-voltage board insulating contact state of temperature.
2. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device according to claim 1, it is characterized in that described
Data processing module (3) include data processing wireless transmit/receive units (12), data processing MCU units (13), communication interface list
First (14) and host computer (15), data processing wireless transmit/receive units (12) receive the information of data collection radio Transmit-Receive Unit (11)
After transmit information to data processing MCU units (13), data processing MCU units (13) are with communication interface unit (14) by double
Work communication transmitting data and instruction, communication interface unit (14) transmit data command with host computer (15) by duplex communication.
3. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device according to claim 1, it is characterized in that described
Infrared temperature sensor be made up of TPS334 infrared detectors and Fresnel lenses, it is infrared using Fresnel lenses as TPS334
The condenser lens of detector, measurement distance ratio is 12:1, away from window 14mm, TPS334 infrared acquisitions in TPS334 infrared detectors
Device is on the perpendicular bisector of Fresnel lenses, and infrared ray focuses on the interior window of TPS334 infrared detectors by Fresnel lenses,
Original 60 ° measurement visual angles are changed into 5 °, point measurement visual angle is realized.
4. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device according to claim 1, it is characterized in that described
The circuit of temperature signal regulation unit (8) be：Infrared temperature sensor U5 exports two paths of signals：V1, V2 and V3, V4, V2 and
V4 is grounded, and V1 is target temperature signal, first by resistance R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 and electric capacity C1,
Enter amplifying circuit after two passive double-t filter circuits of C2, C3, C4, C5, C6 composition, through pull-up resistor R14, R15 and R16
Effect, make signal voltage between 0~3V, then pass through resistance R25, R26, R27, R28, R29 and electric capacity C18, C19, C20 group
Into passive a double-t filter circuit and resistance R30, R31, electric capacity C21, C22, C23 and amplifier U4 constitute a second order has
Power filter, removes power frequency and high-frequency signal, makes signal voltage between 0~3V, the output electricity of target temperature modulate circuit
Press VO1；V3 is ambient temperature signal, first signal pull-up voltage on pull-up resistor R17, then by resistance R18, R19, R20,
R21, R22 and electric capacity C12, C13, C24 composition passive a double-t filter circuit and resistance R23, R24, electric capacity C15, C16,
C17 and amplifier U3 constitute a second-order active power filter circuit, remove power frequency and high-frequency signal, make signal voltage 0~3V it
Between, the output voltage VO 2 of environment temperature modulate circuit, output voltage VO 1, output voltage VO 2 and power supply ± 5V and ground connection
In line access terminal block P1.
5. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device according to claim 1, it is characterized in that described
The circuit of current signal conditioning unit (9) be：Current signal takes its voltage by current transformer U6, by resistance R32,
The active second-order filter amplifying circuit that R33, R35, potentiometer R36, electric capacity C24, C25, C26, C27 and amplifier U7 are constituted, warp
Pull-up resistor R37, R38 and R39 effect, make signal voltage between 0~3V, then pass through amplifier U8, U10 and linear photoconductor
The photoelectric coupled circuit of coupler U9 compositions, realizes signal filtering and voltage isolation, is then adjusted by voltage follower U11 output currents
Manage the output voltage VO 3 of circuit.
6. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device according to claim 1, it is characterized in that described
Data acquisition MCU units (10), the circuit of data collection radio Transmit-Receive Unit (11) be：Data acquisition MCU units (10) are wrapped
Include SOC type C8051F020 single-chip microcomputers U12, reset circuit, JTAG emulators U14 and phase inverter U15, C8051F020 single-chip microcomputer
U12 uses passive crystal oscillator Y1, its I/O mouthfuls of P4.0, P4.1, P4.2, P4.3, P4.4, P4.5, P5.0, P5.1 and P5.2 and data
Gather radio receiving transmitting module U13 ports CSN, CSK, MOSI, MISO, AM, CD, TRX_CE, PWR_UP and TX_EN connection, its I/O
Mouth P2.5 is connected with phase inverter U15, and phase inverter U15 is connected with radio receiving transmitting module U13 port DR, is realized and radio receiving transmitting module
Communication；C8051F020 single-chip microcomputers U12 jtag port TMS, TCK, TDI and TDO and JTAG emulators U14 TMS, TCK,
TDI and TDO connections, realize burning program function；C8051F020 single-chip microcomputers U12 reseting interface RST and button SW1, diode
Electricity resets work(with button in the reset circuit interface RST connections that D3, electric capacity C48, electrochemical capacitor C49 and resistance R55 are constituted, realization
Energy；AD conversion AIN0 that C8051F020 single-chip microcomputers U12 is carried and AIN1 totally 16 paths, respectively with target temperature modulate circuit
Output voltage signal, the output voltage signal of the output voltage signal of environment temperature modulate circuit and current regulating circuit connects
Connect, data acquisition MCU unit gather 6 insulating contact temperature signals, 6 infrared temperature sensor own temperature signals and
3 touch head current signal, use 15 tunnel AD conversion passages.
7. a kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device according to claim 2, it is characterized in that described
Data processing wireless transmit/receive units (12), the circuit of data processing MCU units (13) and communication interface unit (14) be：Data
Handling MCU units (13) includes SOC type C8051F020 single-chip microcomputers U20, reset circuit, JTAG emulators U23 and phase inverter U22,
C8051F020 single-chip microcomputers U20 uses passive crystal oscillator Y2, its I/O mouthfuls of P4.0, P4.1, P4.2, P4.3, P4.4, P4.5, P5.0,
P5.1 and P5.2 and data processing radio receiving transmitting module U21 ports CSN, CSK, MOSI, MISO, AM, CD, TRX_CE, PWR_UP
With TX_EN connections, its I/O mouthfuls of P2.5 is connected with phase inverter U22, phase inverter U22 and data processing radio receiving transmitting module U21 ports
DR connections, realize the communication with data processing radio receiving transmitting module；C8051F020 single-chip microcomputers U20 jtag port TMS, TCK,
TDI and TDO is connected with JTAG emulators U23 TMS, TCK, TDI and TDO, realizes burning program function；C8051F020 monolithics
The reset electricity that machine U20 reseting interface RST and button SW2, diode D4, electric capacity C59, electrochemical capacitor C60 and resistance R58 is constituted
In road interface RST connections, realization electricity with button reset function, interface end RX, TX and DE of communication interface unit (14) circuit with
P0.6, P0.7 and P2.0 connection of data processing MCU unit C8051F020 single-chip microcomputers, pass through photoelectrical coupler U16, U17 respectively
And U18, play light-coupled isolation, by MAX485 chip U19, after pull-up resistor R50, R51 and R52 partial pressure, be incorporated to double
Phase voltage-stabiliser tube D1, D2 and anti-thunder tube GS1, GS2, GS3, prevent overvoltage from destroying circuit board, and outputting communication interface unit data are passed
Defeated end A and B is connected with host computer COM.
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| CN201621338964.8U CN206523234U (en) | 2016-12-08 | 2016-12-08 | A kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device |
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| CN201621338964.8U CN206523234U (en) | 2016-12-08 | 2016-12-08 | A kind of high-voltage board insulating contact on-line temperature monitoring prior-warning device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458041A (en) * | 2020-06-03 | 2020-07-28 | 安徽宝龙电器有限公司 | Infrared temperature sensor |
| CN112924861A (en) * | 2021-01-28 | 2021-06-08 | 国网宁夏电力有限公司培训中心 | Capacitor switching circuit breaker state monitoring method |
| CN116026479A (en) * | 2023-03-24 | 2023-04-28 | 南京中网电气有限公司 | Data processing method and device suitable for infrared temperature measurement system |
-
2016
- 2016-12-08 CN CN201621338964.8U patent/CN206523234U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458041A (en) * | 2020-06-03 | 2020-07-28 | 安徽宝龙电器有限公司 | Infrared temperature sensor |
| CN112924861A (en) * | 2021-01-28 | 2021-06-08 | 国网宁夏电力有限公司培训中心 | Capacitor switching circuit breaker state monitoring method |
| CN116026479A (en) * | 2023-03-24 | 2023-04-28 | 南京中网电气有限公司 | Data processing method and device suitable for infrared temperature measurement system |
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