CN205403986U - Cable terminal temperature monitoring system - Google Patents
Cable terminal temperature monitoring system Download PDFInfo
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- CN205403986U CN205403986U CN201620137080.XU CN201620137080U CN205403986U CN 205403986 U CN205403986 U CN 205403986U CN 201620137080 U CN201620137080 U CN 201620137080U CN 205403986 U CN205403986 U CN 205403986U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 17
- 238000007689 inspection Methods 0.000 claims description 13
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000012806 monitoring device Methods 0.000 abstract 2
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- 230000000295 complement effect Effects 0.000 description 2
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- 230000036413 temperature sense Effects 0.000 description 2
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Abstract
The utility model discloses a cable terminal temperature monitoring system, it includes a plurality of temperature sensing device that install on on -the -spot cable terminal and the central monitoring device of setting at the operation monitoring and controlling center, and temperature sensing device includes temperature sensor and data processing module, and temperature sensor is used for gathering temperature information to give data processing module with temperature information transfer, data processing module is through wireless mode with temperature message routing for the central monitoring device. The utility model discloses the product can real -time supervision cable terminal the temperature to hot spot to probably leading to the accident detects in early days and diagnoses, in time discovers the potential reason of initiation accident and takes corresponding management measure, effective enhancing power supply reliability.
Description
Technical field
This utility model relates to a kind of temperature collecting device, especially a kind of cable terminal temperature monitoring system.
Background technology
Building along with power industry, power supply and electricity consumption enterprise automation and transformation development is perfect, power cable application is more and more extensive, and has occupied immeasurable status in power system.But, tag accident happens occasionally, objectively most cause due to reasons such as cable and the design of adnexa, material or constructions, but the dynamics of monitoring in real time of its operation conditions is inadequate, failing to effectively detect in advance hidden trouble of equipment, the generation controlling accident is also the factor that can not be ignored.Cable is mainly carried out routine test by traditional cable and adnexa insulating monitoring, and detection means is limited due to time difference and staff, causes that Detection results is very inconspicuous, and therefore tag carries out real time on-line monitoring is very necessary.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of practical cable terminal temperature monitoring system.
In order to solve above-mentioned technical problem, this utility model includes multiple temperature sensing device being arranged on on-site cable terminals and is arranged on the Centralizing inspection device at operation monitoring center, each described temperature sensing device includes temperature sensor and data processing module respectively, wherein temperature sensor temperature information of each monitoring point on collection site cable terminal, and temperature information is sent to data processing module, data processing module adopts wireless communication module that temperature information is wirelessly sent to Centralizing inspection device；Described Centralizing inspection device includes stand external receiving unit, stand interior industrial control equipment and background monitoring equipment, and external receiving unit of wherein standing is connected with wireless communication module wirelessly, and in standing, industrial control equipment is connected with the external receiving unit in station and background monitoring equipment respectively.
Described temperature sensor adopts ADT7320 digital temperature sensor.
Described wireless communication module adopts NRF240L1 chip.
The beneficial effects of the utility model are: cable terminal is detected by this utility model product, and the cable terminal temperature of early warning is transmitted data, the real-time detection to power cable terminal head temperature is realized under not affecting cable running safety state, the heat spot that the accident that may result in occurs can be carried out early stage detection and diagnosis, find accidents caused potential cause in time and take corresponding management measure, it is effectively improved power supply continuity and reliability, operation of power networks is significant.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of this utility model cable terminal temperature monitoring system；
Fig. 2 is single-chip microcomputer and multiple temperature sensor connection diagrams in this utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail:
Referring to Fig. 1 and Fig. 2, cable terminal temperature monitoring system of the present utility model includes multiple temperature sensing device being arranged on on-site cable terminals and is arranged on the Centralizing inspection device at operation monitoring center, each described temperature sensing device includes temperature sensor and data processing module respectively, wherein temperature sensor temperature information of each monitoring point on collection site cable terminal, and temperature information is sent to data processing module, data processing module adopts wireless communication module that temperature information is wirelessly sent to Centralizing inspection device；Described Centralizing inspection device includes stand external receiving unit, stand interior industrial control equipment and background monitoring equipment, and external receiving unit of wherein standing is connected with wireless communication module wirelessly, and in standing, industrial control equipment is connected with the external receiving unit in station and background monitoring equipment respectively.
This utility model high-voltage product is achieved by following technical proposals, temperature sense sensing device is installed at cable terminal place, containing temperature sensor in temperature sense sensing device, detect cable termination temperature, monitoring system forms wireless grounding current monitoring network according to GPRSDTU communication protocol and carries out data transmission, and is attached with operation monitoring center.I will specifically describe respectively below:
1. system design: this utility model product is made up of multiple temperature sensing devices being arranged on on-site cable terminals and the device for monitoring running being arranged on operation monitoring center, and multiple temperature sensing devices are wirelessly connected with device for monitoring running；Temperature sensing device is temperature signal collection device, comprising: multiple temperature sensor and data processing module (as shown in Fig. 1 left part)；Wherein: multiple temperature sensors being arranged on cable termination temperature monitoring point are connected with wireless communication module respectively, wireless communication module is wirelessly connected (adopting integrated chip to contain temperature detection and data processing function) with Centralizing inspection device；Temperature sensor is for gathering the temperature information of monitoring point, and temperature information sends to data processing module, and data processing module for being wirelessly sent to Centralizing inspection device by temperature information；
Centralizing inspection device (such as Fig. 1 right part) is the temperature information Centralizing inspection device being arranged on operation monitoring center, comprising: external receiving unit of standing, stand interior industrial control equipment and background monitoring equipment；Wherein: external receiving unit of standing is connected with wireless communication module wirelessly, in standing, industrial control equipment is connected with the external receiving unit in station and background monitoring equipment respectively.
2. equipment choice
A. about the selection of temperature sensing device
Electric pressure is strong at 35kV and above power equipment ambient electromagnetic radiation, and work under bad environment, traditional thermocouple sensor cannot be competent at.Digital temperature sensor, capacity of resisting disturbance is strong, has good compatibility with various singlechip equipment.This product adopts ADT7320 digital temperature sensor to carry out the measurement of temperature.
" one-line " digital temperature sensor ADT7320 is up-to-date 1-wire digital temperature sensor, support " one-wire bus " interface, address wire, data wire and control line are combined into the holding wire of a bi-directional transfer of data by it, it is allowed to have and adopt advanced digital temperature sensor measurement.ADT7320 is mainly made up of four parts: 64 lasered ROM codes, temperature sensor, non-volatile temperature alarming trigger TH and TL and configuration register.
In temperature sensing device, the temperature data register of ADT7320 storage collecting temperature data is made up of two bytes, when ADT7320 uses the resolution of 13, and its minimum measurement temperature 0.0625 degree Celsius.16 complement of two's two's complement temperature values that the ADT7320 of 13 bit resolutions measures.Internal temperature sensor produces the voltage with PTAT, and this voltage is compared with internal reference voltage and inputs to precision digital manipulator.Internal temperature sensor all has high accuracy and the linearity in whole rated temperature range, and user is without being corrected or calibrating.Sensor exports by oneManipulator (also known as charge balance pattern number converter) is digitized processing.This transducer utilizes time domain oversampling and a precision comparator to realize 16 bit resolutions in a very-close-coupled circuit.
Owing to ADT7320 is programmable logic device, for collecting temperature information, temperature acquisition system needs to use computer or microprocessor that ADT7320 is carried out programme-control, namely by sending ROM order to bus, identifies sub-device ADT7320 to be operated in bus.Controller, after choosing the sub-device of ADT7320, can start the temperature transition order of selected ADT7320 or the high-speed register in ADT7320 is written and read operation.
ADT7320 is furnished with 4 line Serial Peripheral Interface (SPI)s (SPI).The data-out pin (DIN) of this interface is for inputting data to device, data output pins (DOUT) is used for from device back read data, serial data clock pin (SCLK) is for providing data clock to device, and chip select pin (CS) is used for enabling or disabling serial line interface.CS is essential for the correct operation of this interface.Data export ADT7320 at SCLK trailing edge, input ADT7320 at SCLK rising edge.
B. about the selection of wireless communication module
Wireless telecommunications adopt NRF240L1 chip, are 2.4-2.5GHz radio transceiver chips, and its composition mainly has frequency generator, ShockBurst enhancement mode controller, power amplifier, crystal oscillator, controller, demodulator.NRF240L1 has low in energy consumption, communication distance good, data transmission stability advantages of higher remote, compatible.
Wireless communication module NRF240L1 has two kinds of mode of operations: one is RX and TX pattern；Another kind is energy saver mode.When system does not send and receives task, it enters idle power save mode；Under idle mode, once there be task to process, it can be put into ShockBurstRX in a short period of time and receive mode and ShockBurstTX transmission mode.Under idle mode, crystal oscillator still works, and the content in configuration register will not be lost.NRF240L1 mode of operation is configured by the another depositor of TRX_CE and TX_EN.
Between communicating wirelessly between NRF240L1, first by SPI interface, NRF240L1 RF transceiver should be configured, arrange including NRF240L1 frequency, mode of operation, output, transmission and reception address (4 bytes), transmission and reception byte length (maximum 32 bytes), crystal oscillator frequency, check bit；Then use W_TX_PAYLOAD order write to send data content, if depositor TRX_CE=1, TRX_EN=1, at NRF240L1 after one section of time delay (about 550-650 μ s), data are sent.When NRF240L1 needs to receive data, TRX_CE=1, TRX_EN=0 must be pre-set, namely under the reception mode of operation of NRF240L1, if there being radio data to receive, mode bit depositor CD, AM will be set high, therefore can pass through to detect CD, AM and judge whether NRF240L1 receives data, and utilize R_TX_PAYLOAD order to read the content received, or utilize two of radio communication to interrupt judging and receiving data.
The design adopt the tunnel cable that scene is run by AVI single-chip microcomputer compatible in above-mentioned NRF240L1 chip and digital temperature chip ADT7320 carry out multi-point temp data acquisition.Fig. 2 gives the connection circuit diagram of NRF240L1 and ADT7320.
3. main website programming
Main website NRF240L1 is connected with GPRS module, it is responsible for setting up data transmission channel with the temperature system in tunnel, receiving the tunnel cable temperature data of substation NRF240L1 timing acquiring under normal circumstances, and transfer to GPRS module, GPRS sends data to host computer by Internet Tele again.Host computer can also use active mode to send temperature acquisition order to GPRS module on the other hand, then passes to the substation NRF240L1 of temperature acquisition system under main website NRF240L1.
Substation NRF240L1 primary responsibility controls ADT7320 collecting temperature data, and carries out radio communication with main website NRF240L1 and upload data or receive the control command of main website.Substation NRF240L1 is after the power-up, first initialize and open transceiving to interrupt, then intervalometer within NRF240L1 is utilized to perform the time delay (15min, 30min etc.) of Fixed Time Interval, collecting temperature data send it to main website after time delay terminates.Additionally after substation receives the RI radio intelligence meeting transformat of main website, collecting temperature immediately can be performed and be uploaded to main website order or adjust sampling time interval.
This utility model product can the temperature of monitoring cable terminals in real time, and the heat spot that may result in accident is carried out early stage detection and diagnosis, find accidents caused potential cause in time and take corresponding management measure, it is effectively improved power supply reliability, certainly also reduces the maintenance cost that manpower is patrolled and examined.
In sum, content of the present utility model is not limited in the above embodiments, and those skilled in the art can propose other embodiment within technological guidance's thought of the present utility model, but these embodiments all include within scope of the present utility model.
Claims (3)
1. a cable terminal temperature monitoring system, it is characterized in that: include multiple temperature sensing device being arranged on on-site cable terminals and be arranged on the Centralizing inspection device at operation monitoring center, each described temperature sensing device includes temperature sensor and data processing module respectively, wherein temperature sensor temperature information of each monitoring point on collection site cable terminal, and temperature information is sent to data processing module, data processing module adopts wireless communication module that temperature information is wirelessly sent to Centralizing inspection device；Described Centralizing inspection device includes stand external receiving unit, stand interior industrial control equipment and background monitoring equipment, and external receiving unit of wherein standing is connected with wireless communication module wirelessly, and in standing, industrial control equipment is connected with the external receiving unit in station and background monitoring equipment respectively.
2. the cable terminal temperature monitoring system described in claim 1, it is characterised in that: described temperature sensor adopts ADT7320 digital temperature sensor.
3. the cable terminal temperature monitoring system according to any one of claim 1 and 2, it is characterised in that: described wireless communication module adopts NRF240L1 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620137080.XU CN205403986U (en) | 2016-02-24 | 2016-02-24 | Cable terminal temperature monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620137080.XU CN205403986U (en) | 2016-02-24 | 2016-02-24 | Cable terminal temperature monitoring system |
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| CN205403986U true CN205403986U (en) | 2016-07-27 |
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| CN201620137080.XU Active CN205403986U (en) | 2016-02-24 | 2016-02-24 | Cable terminal temperature monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689674A (en) * | 2021-08-24 | 2021-11-23 | 国网浙江宁海县供电有限公司 | Online temperature measurement system of cable joint |
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2016
- 2016-02-24 CN CN201620137080.XU patent/CN205403986U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689674A (en) * | 2021-08-24 | 2021-11-23 | 国网浙江宁海县供电有限公司 | Online temperature measurement system of cable joint |
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