CN208432342U - A kind of distribution net equipment temperature online monitoring system - Google Patents
A kind of distribution net equipment temperature online monitoring system Download PDFInfo
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- CN208432342U CN208432342U CN201820825320.4U CN201820825320U CN208432342U CN 208432342 U CN208432342 U CN 208432342U CN 201820825320 U CN201820825320 U CN 201820825320U CN 208432342 U CN208432342 U CN 208432342U
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Abstract
The utility model discloses a kind of distribution net equipment temperature online monitoring systems, comprising: background terminal, temperature sampler and temperature sensor；It is embedded temperature detector that the temperature sensor at the end, which is arranged in,；The embedded temperature detector specifically includes: cable bulkhead, sensor main body and heat-conducting piece；The temperature sensor is connected with the corresponding temperature sampler wireless communication；The temperature sampler and background terminal wireless communication connect.Temperature sensor in the distribution net equipment temperature online monitoring system of the utility model at end is embedded temperature detector, it is set up directly in cable bulkhead, the temperature of cable is transferred to sensor main body by heat-conducting piece, temperature loss caused by no cable jacket obstructs, temperature-measuring results accuracy is high, solves the larger technical problem of current temperature detection error of the distribution net equipment system for detecting temperature for end.
Description
Technical field
The utility model relates to electric power monitoring technical field more particularly to a kind of distribution net equipment temperature online monitoring systems.
Background technique
There are a large amount of electrical equipment in electric system, these electrical equipments can be because of manufacturing process, contact oxidation
Cause fever abnormal with reasons such as electric arc impacts, hide some dangers for for the safe operation of equipment, if cannot in time discovering device it is different
Often fever is easy to cause equipment damage even combustion explosion, causes a large amount of property loss.
So extremely paying attention to the temperature detection of all kinds of electrical equipments in power system monitoring, such as the temperature detection of cable.
End mainly is attached to by temperature sensor for the temperature detection of end in current distribution net equipment system for detecting temperature
Outer surface carry out temperature detection, can not directly measure the temperature in cable jacket, there are certain errors.
Therefore, current distribution net equipment system for detecting temperature is resulted in for the biggish skill of temperature detection error of end
Art problem.
Utility model content
The utility model provides a kind of distribution net equipment temperature online monitoring system, solves current distribution net equipment temperature
The larger technical problem of temperature detection error of the detection system for end.
The utility model provides a kind of distribution net equipment temperature online monitoring system, comprising: background terminal, temperature sampler
And temperature sensor；
The setting of the thermometric point contact of the temperature sensor and distribution net equipment, the temperature measuring point includes end, and setting exists
The temperature sensor at the end is embedded temperature detector；
The embedded temperature detector specifically includes: cable bulkhead, sensor main body and heat-conducting piece；
Hollow cavity is provided in the cable bulkhead, the sensor main body and the heat-conducting piece are arranged described hollow
In cavity；
The hollow cavity is protruded in one end of the heat-conducting piece, and the other end of the heat-conducting piece connects with the sensor main body
Touching setting；
The temperature sensor is connected with the corresponding temperature sampler wireless communication；
The temperature sampler and background terminal wireless communication connect.
Preferably, the sensor main body specifically includes: surface acoustic wave chip and sensor antenna；
The sensor antenna is electrically connected with the signal end of the surface acoustic wave chip.
Preferably, the temperature sampler specifically includes: signal source, master controller, first antenna and the second antenna；
The control terminal of the signal source is electrically connected with the first end of the master controller, the output end of the signal source and institute
State first antenna electrical connection；
The second end of the master controller is electrically connected with the first antenna；
The third end of the master controller is electrically connected with second antenna；
The temperature sampler is connected by the first antenna and temperature sensor wireless communication, and the temperature is adopted
Storage is connected by second antenna and background terminal wireless communication.
Preferably, the temperature sampler further include: the first bandpass filter, power amplifier, the second bandpass filter；
First bandpass filter and the power amplifier are set between the signal source and the first antenna,
The input terminal of first bandpass filter is electrically connected with the output end of the signal source, the output end of the bandpass filter with
The input terminal of the power amplifier is electrically connected, and the output end of the power amplifier is electrically connected with the first antenna；
Second bandpass filter is set between the first antenna and the master controller, the second band logical filter
The input terminal of wave device is electrically connected with the first antenna, and the of the output end of second bandpass filter and the master controller
The electrical connection of two ends.
Preferably, the temperature sampler further include: low-noise amplifier and intermediate frequency amplifier；
The low-noise amplifier is set between the first antenna and second bandpass filter, the low noise
The input terminal of amplifier is electrically connected with the first antenna, the output end of the low noise generator and second bandpass filtering
The input terminal of device is electrically connected；
The intermediate frequency amplifier is set between second bandpass filter and the master controller, the intermediate frequency amplification
The input terminal of device is electrically connected with the output end of second bandpass filter, the output end of the intermediate frequency amplifier and the master control
The second end of device processed is electrically connected.
Preferably, the signal source specifically includes: fixed local oscillation signal source, adjustable local oscillation signal source, the first frequency mixer and
Second frequency mixer；
First output end in the fixed local oscillation signal source is electrically connected with the first input end of first frequency mixer, described
The output end in adjustable local oscillation signal source is electrically connected with the second input terminal of first frequency mixer；
The output end of first frequency mixer is electrically connected with the input terminal of first bandpass filter；
Second frequency mixer is set between the low-noise amplifier and second bandpass filter, and described second
The first input end of frequency mixer is electrically connected with the output end of the low-noise amplifier, the second input terminal of second frequency mixer
It is electrically connected with the second output terminal in the fixed local oscillation signal source, the output end of second frequency mixer and second band logical are filtered
The input terminal of wave device is electrically connected；
The control terminal in the adjustable local oscillation signal source is electrically connected with the first end of the master controller.
Preferably, the temperature sampler further include: first switch and the second switch；
The first switch is set between first frequency mixer and first bandpass filter, the first switch
First end be electrically connected with the output end of first frequency mixer, the second end of the first switch and first bandpass filtering
The input terminal of device is electrically connected；
The second switch is set between the power amplifier, low-noise amplifier and first antenna, and described second
The first end of switch is electrically connected with the output end of the power amplifier, and the second end of the second switch is put with the low noise
The input terminal electrical connection of big device, the third end of the second switch are electrically connected with the first antenna, the control of the second switch
End processed is electrically connected with the 4th end of the master controller.
Preferably, the temperature sampler further include: RS485 interface；
The RS485 interface is electrically connected with the 5th end of the master controller.
Preferably, the surface acoustic wave chip specifically includes: interdigital transducer, reflecting grating and piezoelectric substrate；
The surface of the piezoelectric substrate is arranged in the interdigital transducer and reflecting grating tiling；
The electrical connection of the signal end of the sensor antenna and the interdigital transducer.
Preferably, the heat-conducting piece is specially metal bolts；
The cable bulkhead is provided with and the matched threaded hole of metal bolts；
The screw cap end of the metal bolts protrudes the hollow cavity, and the non-screw cap end of the metal bolts passes through the spiral shell
Pit contacts setting with the surface acoustic wave chip.
As can be seen from the above technical solutions, the utility model has the advantage that
The utility model provides a kind of distribution net equipment temperature online monitoring system, comprising: background terminal, temperature sampler
And temperature sensor；The setting of the thermometric point contact of the temperature sensor and distribution net equipment, the temperature measuring point includes end, if
Setting the temperature sensor at the end is embedded temperature detector；The embedded temperature detector specifically wraps
It includes: cable bulkhead, sensor main body and heat-conducting piece；Be provided with hollow cavity in the cable bulkhead, the sensor main body and
The heat-conducting piece is arranged in the hollow cavity；The hollow cavity is protruded in one end of the heat-conducting piece, the heat-conducting piece
The other end contacts setting with the sensor main body；The temperature sensor connects with the corresponding temperature sampler wireless communication
It connects；The temperature sampler and background terminal wireless communication connect.
Temperature sensor in the distribution net equipment temperature online monitoring system of the utility model at end is embedded
Temperature sensor is set up directly in cable bulkhead, and the temperature of cable is transferred to sensor main body, no cable by heat-conducting piece
Temperature loss caused by shell obstructs, temperature-measuring results accuracys is high, solve current distribution net equipment system for detecting temperature for
The larger technical problem of the temperature detection error of end.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of distribution net equipment temperature online monitoring system integrated connection signal provided by the embodiment of the utility model
Figure；
Fig. 2 is a kind of surface acoustic wave chip structure schematic diagram provided by the embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of embedded SAW Temperature Sensors provided by the embodiment of the utility model；
Fig. 4 is a kind of structural schematic diagram of temperature sampler provided by the embodiment of the utility model；
Wherein, appended drawing reference is as follows:
1, background terminal；2, temperature sampler；3, temperature sensor；4, interdigital transducer；5, reflecting grating；6, piezoelectricity base
Piece；7, heat-conducting piece；8, surface acoustic wave chip；9, sensor antenna；10, cable bulkhead；11, fixed local oscillation signal source；12, adjustable
Local oscillation signal source；13, the first frequency mixer；14, first switch；15, the first bandpass filter；16, power amplifier；17, second
Switch；18, master controller；19, intermediate frequency amplifier；20, the second bandpass filter；21, the second frequency mixer；22, low noise amplification
Device；23, first antenna；24, the second antenna.
Specific embodiment
The utility model embodiment provides a kind of distribution net equipment temperature online monitoring system, solves current distribution and sets
The standby larger technical problem of temperature detection error of the system for detecting temperature for end.
To enable the goal of the invention, feature, advantage of the utility model more obvious and understandable, below in conjunction with this
Attached drawing in utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, shows
So, the embodiments described below are only the utility model a part of the embodiment, and not all embodiment.It is practical based on this
Embodiment in novel, all other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, is fallen within the protection scope of the utility model.
Please refer to Fig. 1 and Fig. 3, the utility model embodiment provides the one of a kind of distribution net equipment temperature online monitoring system
A embodiment, comprising: background terminal 1, temperature sampler 2 and temperature sensor 3；
The thermometric point contact of temperature sensor 3 and distribution net equipment is arranged, and temperature measuring point includes end, is arranged at end
Temperature sensor 3 be embedded temperature detector；
Embedded temperature detector specifically includes: cable bulkhead 10, sensor main body and heat-conducting piece 7；
Hollow cavity is provided in cable bulkhead 10, sensor main body and heat-conducting piece 7 are arranged in hollow cavity；
Hollow cavity is protruded in one end of heat-conducting piece 7, and the other end of heat-conducting piece 7 contacts setting with sensor main body；
Temperature sensor 3 is wirelessly communicated with corresponding temperature sampler 2 and is connected；
Temperature sampler 2 and the wireless communication of background terminal 1 connect.
It should be noted that the temperature measuring point of distribution net equipment is one or more, such as switchgear isolation switch contact, ring
Net cabinet cable connector etc..
Each temperature measuring point is provided with the temperature that temperature sensor 3 measures temperature measuring point, existing sensor mounting means is logical
It is often that sensor is attached to temperature measuring point surface or ties up sensor on temperature measuring point surface by frenulum.
When measuring the temperature of end in this way, because there are biggish there are the barrier of cable insulation shell
Temperature loss, i.e. cable insulation shell internal and external temperature are inconsistent, by sensor setting cable head surface carry out temperature measurement error compared with
Greatly.
Distribution net equipment temperature online monitoring system in the present embodiment uses embedded temperature detector, directly will be in cable
Hollow cavity is set in plug 10, sensor main body is arranged in hollow cavity, and in order to further ensure the standard of thermometric
True property is provided with heat-conducting piece 7, and heat-conducting piece 7 directly contacts setting with cable and sensor body, can be directly by the temperature of cable
The accurate transmission to sensor body carries out thermometric, and temperature-measuring results accuracy is high, solves current distribution net equipment temperature detection system
The larger technical problem of the temperature detection error for end of uniting.
The above are a kind of one embodiment of distribution net equipment temperature online monitoring system provided by the embodiment of the utility model,
The following are a kind of the another of distribution net equipment temperature online monitoring system provided by the embodiment of the utility model.One embodiment.
The utility model embodiment provides the one of a kind of distribution net equipment temperature online monitoring system referring to FIG. 1 to FIG. 4,
A embodiment, comprising: background terminal 1, temperature sampler 2 and temperature sensor 3；
The thermometric point contact of temperature sensor 3 and distribution net equipment is arranged, and temperature measuring point includes end, is arranged at end
Temperature sensor 3 be embedded temperature detector；
Embedded temperature detector specifically includes: cable bulkhead 10, sensor main body and heat-conducting piece 7；
Hollow cavity is provided in cable bulkhead 10, sensor main body and heat-conducting piece 7 are arranged in hollow cavity；
Hollow cavity is protruded in one end of heat-conducting piece 7, and the other end of heat-conducting piece 7 contacts setting with sensor main body；
Temperature sensor 3 is wirelessly communicated with corresponding temperature sampler 2 and is connected；
Temperature sampler 2 and the wireless communication of background terminal 1 connect.
It should be noted that the temperature measuring point of distribution net equipment is one or more, such as switchgear isolation switch contact, ring
Net cabinet cable connector etc..
Each temperature measuring point is provided with the temperature that temperature sensor 3 measures temperature measuring point, temperature sampler 2 receives background terminal
1 thermometric instruction or self-timing send temperature interrogation signal to temperature sensor 3, and temperature sensor 3 measures the temperature of temperature measuring point
Transducing signal is transmitted to temperature sampler 2 after degree, can be with the corresponding temperature sensor 3 of a temperature sampler 2, it can also
With the corresponding multiple temperature sensors 3 of a temperature sampler 2, depending on the distribution situation of specific setting real sensor.
The transducing signal that temperature sampler 2 sends the temperature sensor 3 received is handled to obtain temperature data, and
Temperature data is sent to background terminal 1 to be summarized or further analyze.
Temperature sensor 3, temperature sampler 2 and background terminal 1 pass through Radio-Frequency Wireless Communication.
Existing sensor mounting means is usually that sensor is attached to temperature measuring point surface or sensor is passed through frenulum
It ties up on temperature measuring point surface.
When measuring the temperature of end in this way, because there are biggish there are the barrier of cable insulation shell
Temperature loss, i.e. cable insulation shell internal and external temperature are inconsistent, by sensor setting cable head surface carry out temperature measurement error compared with
Greatly.
Distribution net equipment temperature online monitoring system in the present embodiment uses embedded temperature detector, directly will be in cable
Hollow cavity is set in plug 10, sensor main body is arranged in hollow cavity, and in order to further ensure the standard of thermometric
True property is provided with heat-conducting piece 7, and heat-conducting piece 7 directly contacts setting with cable and sensor body, can be directly by the temperature of cable
The accurate transmission to sensor body carries out thermometric, and temperature-measuring results accuracy is high.
Further, sensor main body specifically includes: surface acoustic wave chip 8 and sensor antenna 9；
Sensor antenna 9 is electrically connected with the signal end of surface acoustic wave chip 8.
It should be noted that the sensor main body in embedded type sensor can according to need and be selected, but works as and adopt
When battery-powered temperature sensor 3, because being in high-temperature work environment, there are some potential safety problemss, and replace electricity
Pond can bring biggish maintenance cost.
It is therefore preferable that selecting surface acoustic wave chip 8 and sensor antenna 9 as sensor main body, surface acoustic wave thermometric is
A kind of passive temperature sensing means, thermometric is not necessarily to battery or other electricity getting devices, no security risk in the process, and once installation is basic
It does not need to safeguard, maintenance cost is low.
Further, temperature sampler 2 specifically includes: signal source, master controller 18, first antenna 23 and the second antenna
24；
The control terminal of signal source is electrically connected with the first end of master controller 18,23 electricity of output end and first antenna of signal source
Connection；
The second end of master controller 18 is electrically connected with first antenna 23；
The third end of master controller 18 is electrically connected with the second antenna 24；
Temperature sampler 2 is connected by first antenna 23 and the wireless communication of temperature sensor 3, and temperature sampler 2 passes through the
Two antennas 24 are connected with the wireless communication of background terminal 1.
It should be noted that being routed in view of each 2 layout pitch of temperature sampler is larger, and reducing, temperature acquisition
Device 2 can be designed using double antenna, and first antenna 23 is communicated with temperature sensor 3, and the second antenna 24 is communicated with background terminal 1,
Mode reduces wiring by wireless communication.
First antenna 23 can be set to plate aerial, and first antenna 23 can be separated with 2 ontology of temperature sampler and be set
It sets, if first antenna 23 is installed on ring network cabinet cable vault side wall, 2 ontology of temperature sampler is installed on the control room of ring network cabinet, the
One antenna 23 and 2 ontology of temperature sampler transmit signal by feeder line.
Background terminal 1 can be the PC terminal of entity, and the Cloud Server platform being also possible on NB-IoT network, backstage is eventually
End 1 can receive and manage simultaneously the temperature data of multiple temperature samplers 2, and according to the surface temperature mould of temperature model and actual measurement
The temperature at cable connector is drawn up for showing and storing, whether is transfinited according to temperature, by short message or APP message informing user,
And the temperature information of history is combined, anticipation is made to failure, provides foundation for intelligence maintenance, the downloading of plate grade information, temperature is provided
Data acquisition, temperature data processing, temperature data simulation, the prediction of apparatus overheat fault diagnosis, temperature trend, comprehensive inquiry statistics
Etc. functions.
The signal frequency of interaction can be set to 800MHz between background terminal 1 and temperature sampler 2, which has
Diffracting power is strong, under the conditions of good in anti-interference performance, identical transmission power transmission range farther out the characteristics of, be suitable in power equipment
The structure and electromagnetic environment of portion's complexity, the signal frequency of interaction can be set between temperature sampler 2 and temperature sensor 3
433MHz, which is advantageously implemented sensor bulk miniaturization, and the production difficulty of sensor ID T is lower, yield rate
It is high.
Further, temperature sampler 2 further include: the first bandpass filter 15, power amplifier 16, the second bandpass filtering
Device 20；
First bandpass filter 15 and power amplifier 16 are set between signal source and first antenna 23, the filter of the first band logical
The input terminal of wave device 15 is electrically connected with the output end of signal source, the output end of bandpass filter and the input terminal of power amplifier 16
Electrical connection, the output end of power amplifier 16 are electrically connected with first antenna 23；
Second bandpass filter 20 is set between first antenna 23 and master controller 18, the second bandpass filter 20 it is defeated
Enter end to be electrically connected with first antenna 23, the output end of the second bandpass filter 20 is electrically connected with the second end of master controller 18.
It should be noted that there are certain noises for signal and 23 received signal of first antenna that signal source generates, lead to
These noises can be eliminated by crossing the first bandpass filter 15 and the second bandpass filter 20.
What signal source generally produced is all low-power level signal, and the signal that power amplifier 16 generates signal source can be set
It amplifies.
Further, temperature sampler 2 further include: low-noise amplifier 22 and intermediate frequency amplifier 19；
Low-noise amplifier 22 is set between first antenna 23 and the second bandpass filter 20, low-noise amplifier 22
Input terminal is electrically connected with first antenna 23, and the output end of low noise generator and the input terminal of the second bandpass filter 20 are electrically connected
It connects；
Intermediate frequency amplifier 19 is set between the second bandpass filter 20 and master controller 18, the input of intermediate frequency amplifier 19
End is electrically connected with the output end of the second bandpass filter 20, the output end of intermediate frequency amplifier 19 and the second end electricity of master controller 18
Connection.
It should be noted that the filtering of the second bandpass filter 20 for convenience, it is right to can be set low-noise amplifier 22
The low-frequency noise for needing to filter amplifies, and facilitates subsequent filtering.
In order to improve the data analysis precision of master controller 18, the frequency wave that settable intermediate frequency amplifier 19 analyzes needs
Section amplifies, so that the data of subsequent master controller 18 are analyzed.
Further, signal source specifically includes: fixed local oscillation signal source 11, adjustable local oscillation signal source 12, the first frequency mixer
13 and second frequency mixer 21；
First output end in fixed local oscillation signal source 11 is electrically connected with the first input end of the first frequency mixer 13, adjustable local oscillator
The output end of signal source 12 is electrically connected with the second input terminal of the first frequency mixer 13；
The output end of first frequency mixer 13 is electrically connected with the input terminal of the first bandpass filter 15；
Second frequency mixer 21 is set between low-noise amplifier 22 and the second bandpass filter 20, the second frequency mixer 21
First input end is electrically connected with the output end of low-noise amplifier 22, the second input terminal of the second frequency mixer 21 and fixed local oscillator letter
The second output terminal electrical connection in number source 11, the output end of the second frequency mixer 21 and the input terminal of the second bandpass filter 20 are electrically connected
It connects；
The control terminal in adjustable local oscillation signal source 12 is electrically connected with the first end of master controller 18.
If it is motivated it should be noted that achievable in response band to the excitation of surface acoustic wave device, but
It is only when driving frequency is equal with its natural resonance frequency, the energy of surface acoustic wave device output is most strong.
For different surface acoustic wave devices, resonance frequency is all different, so needing to adjust the frequency of pumping signal
Adjustable local oscillation signal source 12 is set on the basis of fixed local oscillation signal source 11.
In order to which the signal and the signal and first antenna 23 in adjustable local oscillation signal source 12 of fixing local oscillation signal source 11 are received
To feedback signal merged, the first frequency mixer 13 and the second frequency mixer 21 are set.
Further, temperature sampler 2 further include: first switch 14 and second switch 17；
First switch 14 is set between the first frequency mixer 13 and the first bandpass filter 15, the first end of first switch 14
It is electrically connected with the output end of the first frequency mixer 13, the second end of first switch 14 and the input terminal of the first bandpass filter 15 are electrically connected
It connects；
Second switch 17 is set between power amplifier 16, low-noise amplifier 22 and first antenna 23, second switch
17 first end is electrically connected with the output end of power amplifier 16, and the second end of second switch 17 is defeated with low-noise amplifier 22
Enter end electrical connection, the third end of second switch 17 is electrically connected with first antenna 23, the control terminal and master controller of second switch 17
18 the 4th end electrical connection.
It should be noted that controlling output signal for convenience and receiving signal, first switch 14 and second can be set
Switch 17 controls output signal and reception signal by control first switch 14 and turning on and off for second switch 17.
Further, temperature sampler 2 further include: RS485 interface；
RS485 interface is electrically connected with the 5th end of master controller 18.
It should be noted that accessing other equipment for convenience, RS485 interface can be set.
Further, surface acoustic wave chip 8 specifically includes: interdigital transducer 4, reflecting grating 5 and piezoelectric substrate 6；
Interdigital transducer 4 and reflecting grating 5, which tile, is arranged in the surface of piezoelectric substrate 6；
The electrical connection of the signal end of sensor antenna 9 and interdigital transducer 4.
It should be noted that surface acoustic wave chip 8 specifically includes: interdigital transducer 4, reflecting grating 5 and piezoelectric substrate 6, fork
Finger transducer 4 and reflecting grating 5, which tile, is arranged in the surface of piezoelectric substrate 6, the signal end of sensor antenna 9 and interdigital transducer 4
Electrical connection.
Interdigital transducer 4 refers to the metal pattern that the finger cross-like of two hands of shape picture is formed on 6 surface of piezoelectric substrate,
Its effect is to realize acoustic-electric transducing.
The temperature measurement signal of temperature sampler 2 is passed to interdigital transducer 4, the inverse pressure of interdigital transducer 4 by sensor antenna 9
Electrical effect is in piezoelectric substrate 6 surface activation, one surface acoustic wave, and surface acoustic wave is propagated along piezoelectric substrate 6, by 6 last week of piezoelectric substrate
The reflecting grating 5 of phase property distribution reflects to form resonance, and the frequency of resonance is related with the temperature of piezoelectric substrate 6, and interdigital transducer 4 passes through
Piezoelectric effect converts the radio frequency signal of response by antenna transmission to temperature sampler 2 for the surface acoustic wave after resonance,
Temperature sampler 2 completes temperature according to the frequency of the feedback signal received and the temperature-frequency corresponding relationship of surface acoustic wave
The parsing and calculating of information.
Further, heat-conducting piece 7 is specially metal bolts；
Cable bulkhead 10 is provided with and the matched threaded hole of metal bolts；
The screw cap end of metal bolts protrudes hollow cavity, and the non-screw cap end of metal bolts passes through threaded hole and surface acoustic wave core
The contact setting of piece 8.
It should be noted that the shape of heat-conducting piece 7 can according to need and be selected, such as select metal bolts as thermally conductive
Part 7.
The screw cap end of metal bolts protrudes hollow cavity, is used for and conductive cable contacts, the non-screw cap end of metal bolts pass through spiral shell
Pit contacts setting with surface acoustic wave chip 8.
Length of the metal bolts in cable bulkhead 10 can be adjusted by rotation by being advantageous in that using metal bolts, be adjusted
The elasticity that section metal bolts are contacted with surface acoustic wave chip 8.
In the present embodiment, temperature sensor 3 and temperature sampler 2 are communicated by wireless signal, therefore can will be warm
It spends collector 2 to be arranged in distribution net equipment low-pressure side position appropriate, high and low pressure side is completely isolated, has high safety, nothing
Line communication mode can be widely used in measurement visual range and there are the various object temperatures of barrier.
In order to improve the accuracy of cable head temperature detection, embedded temperature is set by the temperature sensor 3 at end
Sensor is spent, is set up directly in cable bulkhead 10, the temperature of cable is transferred to by sensor main body, no electricity by heat-conducting piece 7
Temperature loss caused by cable shell obstructs, temperature-measuring results accuracy are high.
Sensor main body is used as using surface acoustic wave chip 8 and sensor antenna 9, is surveyed by surface acoustic wave techniques
Temperature, is a kind of passive and wireless thermometry, no security risk, and maintenance cost is low.
The signal frequency of interaction can be set to 800MHz between background terminal 1 and temperature sampler 2, which has
Diffracting power is strong, under the conditions of good in anti-interference performance, identical transmission power transmission range farther out the characteristics of, be suitable in power equipment
The structure and electromagnetic environment of portion's complexity, the signal frequency of interaction can be set between temperature sampler 2 and temperature sensor 3
433MHz, which is advantageously implemented sensor bulk miniaturization, and the production difficulty of sensor ID T is lower, yield rate
It is high.
By the way that the first bandpass filter 15, the second bandpass filter 20, power amplifier 16, low-noise amplifier 22 is arranged
The noise in signal is reduced with intermediate frequency amplifier 19 and improves the accuracy of signal analysis.
RS485 interface is set to access other equipment, increases the scalability of system.
Metal bolts are set by heat-conducting piece 7, metal heat-conducting performance is good, and the shape of bolt can adjust metal by rotation
Length of the bolt in cable bulkhead 10 adjusts the elasticity that metal bolts are contacted with surface acoustic wave chip 8.
Without manual inspection, it can directly monitor the temperature of various controller switching equipment tested points on-line, avoid manual inspection side
The problem of maintenance cost existing for formula is high, monitors not in time.
In conclusion the distribution net equipment temperature online monitoring system in the present embodiment solves current distribution net equipment temperature
The larger technical problem of temperature detection error of the detection system for end.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (10)
1. a kind of distribution net equipment temperature online monitoring system characterized by comprising background terminal, temperature sampler and temperature
Sensor；
The setting of the thermometric point contact of the temperature sensor and distribution net equipment, the temperature measuring point includes end, is arranged described
The temperature sensor at end is embedded temperature detector；
The embedded temperature detector specifically includes: cable bulkhead, sensor main body and heat-conducting piece；
Hollow cavity is provided in the cable bulkhead, the sensor main body and the heat-conducting piece are arranged in the hollow cavity
It is interior；
The hollow cavity is protruded in one end of the heat-conducting piece, and the other end of the heat-conducting piece is contacted with the sensor main body and set
It sets；
The temperature sensor is connected with the corresponding temperature sampler wireless communication；
The temperature sampler and background terminal wireless communication connect.
2. a kind of distribution net equipment temperature online monitoring system according to claim 1, which is characterized in that the sensor master
Body specifically includes: surface acoustic wave chip and sensor antenna；
The sensor antenna is electrically connected with the signal end of the surface acoustic wave chip.
3. a kind of distribution net equipment temperature online monitoring system according to claim 1, which is characterized in that the temperature acquisition
Implement body includes: signal source, master controller, first antenna and the second antenna；
The control terminal of the signal source is electrically connected with the first end of the master controller, the output end of the signal source and described the
The electrical connection of one antenna；
The second end of the master controller is electrically connected with the first antenna；
The third end of the master controller is electrically connected with second antenna；
The temperature sampler is connected by the first antenna and temperature sensor wireless communication, the temperature sampler
It is connected by second antenna and background terminal wireless communication.
4. a kind of distribution net equipment temperature online monitoring system according to claim 3, which is characterized in that the temperature acquisition
Device further include: the first bandpass filter, power amplifier, the second bandpass filter；
First bandpass filter and the power amplifier are set between the signal source and the first antenna, described
The input terminal of first bandpass filter is electrically connected with the output end of the signal source, the output end of the bandpass filter with it is described
The input terminal of power amplifier is electrically connected, and the output end of the power amplifier is electrically connected with the first antenna；
Second bandpass filter is set between the first antenna and the master controller, second bandpass filter
Input terminal be electrically connected with the first antenna, the second end of the output end of second bandpass filter and the master controller
Electrical connection.
5. a kind of distribution net equipment temperature online monitoring system according to claim 4, which is characterized in that the temperature acquisition
Device further include: low-noise amplifier and intermediate frequency amplifier；
The low-noise amplifier is set between the first antenna and second bandpass filter, the low noise amplification
The input terminal of device is electrically connected with the first antenna, the output end of the low noise generator and second bandpass filter
Input terminal electrical connection；
The intermediate frequency amplifier is set between second bandpass filter and the master controller, the intermediate frequency amplifier
Input terminal is electrically connected with the output end of second bandpass filter, the output end of the intermediate frequency amplifier and the master controller
Second end electrical connection.
6. a kind of distribution net equipment temperature online monitoring system according to claim 5, which is characterized in that the signal source tool
Body includes: fixed local oscillation signal source, adjustable local oscillation signal source, the first frequency mixer and the second frequency mixer；
First output end in the fixed local oscillation signal source is electrically connected with the first input end of first frequency mixer, described adjustable
The output end in local oscillation signal source is electrically connected with the second input terminal of first frequency mixer；
The output end of first frequency mixer is electrically connected with the input terminal of first bandpass filter；
Second frequency mixer is set between the low-noise amplifier and second bandpass filter, second mixing
The first input end of device is electrically connected with the output end of the low-noise amplifier, the second input terminal of second frequency mixer and institute
State the second output terminal electrical connection in fixed local oscillation signal source, the output end of second frequency mixer and second bandpass filter
Input terminal electrical connection；
The control terminal in the adjustable local oscillation signal source is electrically connected with the first end of the master controller.
7. a kind of distribution net equipment temperature online monitoring system according to claim 6, which is characterized in that the temperature acquisition
Device further include: first switch and the second switch；
The first switch is set between first frequency mixer and first bandpass filter, and the of the first switch
One end is electrically connected with the output end of first frequency mixer, the second end of the first switch and first bandpass filter
Input terminal electrical connection；
The second switch is set between the power amplifier, low-noise amplifier and first antenna, the second switch
First end be electrically connected with the output end of the power amplifier, the second end of the second switch and the low-noise amplifier
Input terminal electrical connection, the third end of the second switch is electrically connected with the first antenna, the control terminal of the second switch
It is electrically connected with the 4th end of the master controller.
8. a kind of distribution net equipment temperature online monitoring system according to claim 3, which is characterized in that the temperature acquisition
Device further include: RS485 interface；
The RS485 interface is electrically connected with the 5th end of the master controller.
9. a kind of distribution net equipment temperature online monitoring system according to claim 2, which is characterized in that the surface acoustic wave
Chip specifically includes: interdigital transducer, reflecting grating and piezoelectric substrate；
The surface of the piezoelectric substrate is arranged in the interdigital transducer and reflecting grating tiling；
The electrical connection of the signal end of the sensor antenna and the interdigital transducer.
10. a kind of distribution net equipment temperature online monitoring system according to claim 2, which is characterized in that the heat-conducting piece
Specially metal bolts；
The cable bulkhead is provided with and the matched threaded hole of metal bolts；
The screw cap end of the metal bolts protrudes the hollow cavity, and the non-screw cap end of the metal bolts passes through the threaded hole
Setting is contacted with the surface acoustic wave chip.
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| CN108398196A (en) * | 2018-05-30 | 2018-08-14 | 广东电网有限责任公司 | A kind of distribution net equipment temperature online monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108398196A (en) * | 2018-05-30 | 2018-08-14 | 广东电网有限责任公司 | A kind of distribution net equipment temperature online monitoring system |
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