CN109521360A - Relay contact signal detection apparatus and system - Google Patents
Relay contact signal detection apparatus and system Download PDFInfo
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- CN109521360A CN109521360A CN201811632515.8A CN201811632515A CN109521360A CN 109521360 A CN109521360 A CN 109521360A CN 201811632515 A CN201811632515 A CN 201811632515A CN 109521360 A CN109521360 A CN 109521360A
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- contact signal
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- relay contact
- density monitor
- radio receiver
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000012795 verification Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 229910018503 SF6 Inorganic materials 0.000 description 52
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 51
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of relay contact signal detection apparatus and systems, comprising: signal pickup assembly, signal processing apparatus, control device, pressure controlling device, radio receiver and wireless base station apparatus；Signal pickup assembly and wireless base station apparatus are arranged in the convergence control cabinet of SF6 density monitor；Control device is connect with signal processing apparatus, pressure controlling device and radio receiver respectively；Control device is for controlling pressure controlling device output pressure value to SF6 density monitor；Signal pickup assembly is used to acquire the contact signal of SF6 density monitor；Wireless base station apparatus is used to contact signal being sent to radio receiver；Radio receiver receives the contact signal that wireless base station apparatus is sent；Signal processing apparatus detects contact signal, obtains testing result, and which avoids the disassembly repeatedly of the terminals of SF6 density monitor, improves the Experience Degree of user.
Description
Technical field
The present invention relates to instrument and equipment detection technique field, more particularly, to a kind of relay contact signal detection apparatus and
System.
Background technique
SF6 (sulfur hexafluoride) density monitor detection device with SF6 gas be verification medium, by acquisition SF6 density after
The contact signal of electric appliance, by the working condition that SF6 density monitor contact is calculated.
The contact signal of SF6 density monitor is by being wiredly connected on convergence control cabinet, it usually needs staff is former
Some signal wires are dismantled, and acquisition signal wire are connected to the output end of density monitor contact point signal, are acquired signal in real time and are transferred to
On SF6 density monitor verifying attachment host, by signal processing, the pressure value when signal acted at this time occurs, warp are write down
It crosses computer to summarize, processing generates report, is supplied to relevant persons in charge and analyzes and judge.Accordingly, there exist SF6 density after
The technical issues of signal wire need to be disconnected when appliance contact signal detection repeatedly.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of relay contact signal detection apparatus and system, to solve
The technical issues of signal wire need to be disconnected when SF6 density monitor contact signal detection existing in the prior art repeatedly.
In a first aspect, the embodiment of the present invention provides a kind of relay contact signal detection apparatus, comprising: signal acquisition dress
It sets, signal processing apparatus, control device, pressure controlling device, radio receiver and wireless base station apparatus；Signal acquisition dress
It sets and wireless base station apparatus is arranged in the convergence control cabinet of SF6 density monitor；Control device respectively with signal processing apparatus, pressure
Power regulation device and radio receiver connection；Control device is defeated to pressure for controlling pressure controlling device output pressure value
Device out；Pressure value is delivered to SF6 density monitor by pressure output device；Signal pickup assembly for acquire SF6 density after
The contact signal of electric appliance；Wireless base station apparatus is used to contact signal being sent to radio receiver；Radio receiver receives
The contact signal that wireless base station apparatus is sent；Signal processing apparatus detects contact signal, obtains testing result.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein nothing
Line reception device and wireless base station apparatus include: any one in blue-tooth device, ZigBee device and RoLa device.
With reference to first aspect, the embodiment of the invention provides second of possible embodiments of first aspect, wherein letter
Number acquisition device is calipers pulse current detector.
With reference to first aspect, the embodiment of the invention provides the third possible embodiments of first aspect, wherein nothing
It is detachably connected between line reception device and control device.
With reference to first aspect, the embodiment of the invention provides the 4th kind of possible embodiments of first aspect, wherein also
It include: data presentation device and signal prompt device；Data presentation device and signal prompt device connect with control device
It connects；Data presentation device is for showing testing result；Signal prompt device is for prompting verification state.
With reference to first aspect, the embodiment of the invention provides the 5th kind of possible embodiments of first aspect, wherein number
It is light emitting diode (Light Emitting Diode, abbreviation LED) liquid crystal display according to display device.
With reference to first aspect, the embodiment of the invention provides the 6th kind of possible embodiments of first aspect, wherein letter
Number suggestion device includes: light emitting diode and loudspeaker；Light emitting diode is used to carry out light prompt to verification state；Loudspeaking
Device is used to carry out auditory tone cues to verification state.
Second aspect, the embodiment of the present invention also provide a kind of relay contact signal detection system, comprising: pressure source is set
It is standby, verification gas piping interface, SF6 density monitor convergence control cabinet and as described in relation to the first aspect relay contact signal inspection
Survey device；Pressure source device is connect with relay contact signal supervisory instrument；It verifies gas piping interface and relay contact is believed
The connection of number detection device；Between the convergence control cabinet and relay contact signal supervisory instrument of SF6 density monitor by wireless communication
Connection；Pressure source device is used to provide gas by verification gas piping interface for SF6 density monitor.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein
Transmission antenna is additionally provided on the convergence control cabinet of SF6 density monitor.
In conjunction with second aspect, the embodiment of the invention provides second of possible embodiments of second aspect, wherein
Receiving antenna is additionally provided on SF6 density monitor contact signal checking device.
Technical solution provided in an embodiment of the present invention brings following the utility model has the advantages that the embodiment of the present invention provides a kind of relay
Device contact signal detection device and system, comprising: signal pickup assembly, signal processing apparatus, control device, pressure controlling dress
It sets, radio receiver and wireless base station apparatus, wherein signal pickup assembly and wireless base station apparatus setting are close in SF6
It spends in the convergence control cabinet of relay, control device connects with signal processing apparatus, pressure controlling device and radio receiver respectively
It connects, control device is for controlling pressure controlling device output pressure value to SF6 density monitor, and signal pickup assembly is for acquiring
The contact signal of SF6 density monitor, in addition, wireless base station apparatus is used to contact signal being sent to radio receiver, nothing
Line reception device receives the contact signal that wireless base station apparatus is sent, and signal processing apparatus detects contact signal, thus
Testing result is obtained, therefore, the information of the contact signal by being wirelessly transferred SF6 density monitor, so that checkout procedure is not necessarily to
It takes out stitches, avoids secondary circuit and disconnect line bring operating risk and security risk, eliminate field-checking signal line length not
Enough problems reduce field-checking cabling insecurity factor, safety and the working efficiency of working site are improved, to solve
The technical issues of signal wire need to be disconnected when SF6 density monitor contact signal detection existing in the prior art of having determined repeatedly.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification and attached drawing
Specifically noted structure is achieved and obtained.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of relay contact signal detection apparatus provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another relay contact signal detection apparatus provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of relay contact signal detection system provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of relay contact signal detection data flow provided in an embodiment of the present invention.
Icon: 1- relay contact signal supervisory instrument；2- pressure source device；3- verifies gas piping interface；4-SF6 is close
Spend the convergence control cabinet of relay；11- signal pickup assembly；12- signal processing apparatus；13- control device；14- pressure controlling device；
15- radio receiver；16- wireless base station apparatus；17- data presentation device；18- signal prompt device.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Currently, existing SF6 relay examine need to signal wire in convergence control cabinet the electrification of SF6 density monitor from remittance
It is removed in control cabinet, is linked into the signal input part of SF6 density monitor verifying attachment, easily leads to connecing for SF6 density monitor
The disassembly repeatedly of line end, influences the reliability of its wiring, and there are security risks.
Based on this, a kind of relay contact signal detection apparatus provided in an embodiment of the present invention and system be can solve existing
There is the technical issues of need to disconnecting signal wire when SF6 density monitor contact signal detection present in technology repeatedly.
For convenient for understanding the present embodiment, first to a kind of relay contact signal disclosed in the embodiment of the present invention
Detection device and system describe in detail.
Embodiment one:
The embodiment of the present invention provides a kind of relay contact signal detection apparatus, as shown in Figure 1, the equipment includes: signal
Acquisition device 11, signal processing apparatus 12, control device 13, pressure controlling device 14, radio receiver 15 and wireless hair
Send device 16.
It should be noted that the remittance of SF6 density monitor is arranged in signal pickup assembly 11 and wireless base station apparatus 16
It controls in cabinet 4；Control device 13 is connect with signal processing apparatus 12, pressure controlling device 14 and radio receiver 15 respectively.
Wherein, signal pickup assembly 11 is calipers pulse current detector.Radio receiver 15 and wireless base station apparatus 16 are equal
It include: blue-tooth device, ZigBee (the low-power consumption LAN protocol based on IEEE802.15.4 standard) device and RoLa (low function
Rate spreads remote transmission technology) any one in device, blue-tooth device has low-power consumption and transmission rate is high, communication distance
Closely (in general 10m) the features such as；ZigBee device has low-power consumption, low cost, large capacity, time delay short, reliable and safe
Feature；Rola device has low-power consumption and remote transmission, transmits the features such as reliable and stable, wherein above-mentioned blue-tooth device,
ZigBee device and RoLa device are that short-range communication means, i.e. radio receiver and radio receiver can be according to users
Demand selects communication device, can be any one in blue-tooth device, ZigBee device and RoLa device.
In addition, being detachably connected between radio receiver 15 and control device 13, plug and play is realized, and avoid tearing open
Line brings good experience to user.
Control device 13 is for controlling 14 output pressure value of pressure controlling device to SF6 density monitor；Signal acquisition dress
11 are set for acquiring the contact signal of SF6 density monitor；Wireless base station apparatus 16 wirelessly connects for contact signal to be sent to
Receiving apparatus 15；Radio receiver 15 receives the contact signal that wireless base station apparatus 16 is sent；Signal processing apparatus 12 is to contact
Signal is detected, and testing result is obtained.
When SF6 density monitor contact is in open-circuit condition i.e.: when no current in circuit, with SF6 density monitor pressure
The variation of power, SF6 density monitor contact are in closed state i.e.: when having electric current in circuit, there is faint inspection in circuit at this time
It surveys electric current to pass through, collects this small-signal using the calipers pulse current detector based on hall principle, by integrated
Amplifier amplification in circuit makes the voltage amplification to being enough to export stronger signal, the touching of convergence control cabinet acquisition density monitor
After point signal, wireless signal is modulated into a manner of electromagnetic wave by antenna sending by wireless base station apparatus, wherein wireless hair
Device is sent to send SF6 density monitor contact open and close signal.The letter of radio receiver reception contact signal
Breath sends contact signal information to signal processing apparatus, and signal processing apparatus carries out data processing to contact signal information, obtains
To testing result.
In addition, another relay contact signal detection apparatus, as shown in Fig. 2, in addition to the above described configuration, further includes:
Data presentation device 17 and signal prompt device 18；Data presentation device 17 and signal prompt device 18 are and control device
13 connections；Data presentation device 17 is for showing testing result；Signal prompt device 18 is for prompting verification state.Its
In, data presentation device 17 is LED liquid-crystal display.Wherein, testing result includes: that SF6 density monitor contact is working properly
Or the abnormal information of SF6 density monitor contact work, the state of inspection include: the alarm of SF6 density monitor contact, close
The states such as lock and over-voltage.Wherein, signal prompt device 18 includes: light emitting diode and loudspeaker；Light emitting diode is used for
Light prompt is carried out to verification state；Loudspeaker is used to carry out auditory tone cues to verification state, such as: at the contact of density monitor
In alarm state of value when, diode displaying is red, and loudspeaker buzzing is primary；The contact of density monitor is in locking value
When state, diode displaying is green, and loudspeaker buzzing is twice；When the contact of density monitor is in overvoltage condition, hair
Optical diode is shown as yellow, and loudspeaker buzzing is three times.
The embodiment of the present invention provides a kind of relay contact signal detection apparatus, comprising: signal pickup assembly, signal processing
Device, control device, pressure controlling device, radio receiver and wireless base station apparatus, wherein signal pickup assembly and
Wireless base station apparatus is arranged in the convergence control cabinet of SF6 density monitor, control device respectively with signal processing apparatus, pressure controlling
Device and radio receiver connection, control device is for controlling pressure controlling device output pressure value to SF6 density relay
Device, signal pickup assembly are used to acquire the contact signal of SF6 density monitor, in addition, wireless base station apparatus is for believing contact
It number is sent to radio receiver, radio receiver receives the contact signal that wireless base station apparatus is sent, signal processing apparatus
Contact signal is detected, so that testing result is obtained, the contact signal which passes through wireless transmission SF6 density monitor
Information eliminated so that checkout procedure without taking out stitches, avoids secondary circuit and disconnects line bring operating risk and security risk
Field-checking signal line length inadequate problem, reduces field-checking cabling insecurity factor, improves working site
Safety and working efficiency bring good experience to user.
Embodiment two:
The embodiment of the present invention provides a kind of relay contact signal detection system, as shown in Figure 3, comprising: pressure source equipment
2, gas piping interface 3, the convergence control cabinet 4 of SF6 density monitor and the relay contact signal as described in embodiment one are verified
Detection device 1；Pressure source device 2 is connect with relay contact signal supervisory instrument 1；Verify gas piping interface 3 and relay
Contact signal detection device 1 connects；Pass through between the convergence control cabinet 4 and relay contact signal supervisory instrument 1 of SF6 density monitor
Wireless communication connection.
Specifically, pressure source device is used to provide gas by verification gas piping interface for SF6 density monitor.Pressure
Source device is modulated into stable rate of pressure rise and fall off rate by pressure control device, pressure output to pressure output
Device, from pressure output device to density monitor supply pressure.
In addition, transmission antenna is additionally provided on the convergence control cabinet of SF6 density monitor, SF6 density monitor contact signal school
Receiving antenna is additionally provided on experiment device, convergence control cabinet is sent out collected contact signal with electromagnetic wave by sending electric wire
It goes, electromagnetic wave is converted by receiving antenna by contact signal in receiving end, is realized to the alarm of SF6 density monitor, locking, mistake
The real time monitoring of the checking procedures contact switch states such as pressure.
Fig. 4 show the schematic diagram of relay contact signal detection data flow, wherein the contact of SF6 density monitor
In idle state, the control pressure controlling device of control device, pressure controlling device controls pressure source device for pressure
It is conveyed to SF6 density monitor, the contact generation movement of SF6 density monitor, the change of signal pickup assembly collect contacts signal
Change information, sent by wireless base station apparatus, radio receiver receives the change information of contact signal, and passes through signal
Processing unit is handled to obtain testing result.
The embodiment of the present invention by wireless transmission SF6 density monitor contact signal information so that checkout procedure without
It need to take out stitches, avoid secondary circuit and disconnect line bring operating risk and security risk, eliminate field-checking signal line length
Inadequate problem reduces field-checking cabling insecurity factor, improves safety and the working efficiency of working site, and gives
User brings good experience.
Relay contact signal detection system provided in an embodiment of the present invention, with relay contact provided by the above embodiment
Signal detection apparatus technical characteristic having the same reaches identical technical effect so also can solve identical technical problem.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
The computer program product of relay contact signal detection apparatus and system is carried out provided by the embodiment of the present invention,
Computer readable storage medium including storing the executable non-volatile program code of processor, said program code include
Instruction can be used for executing previous methods method as described in the examples, specific implementation can be found in embodiment of the method, herein no longer
It repeats.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.The apparatus embodiments described above are merely exemplary, for example, the division of the unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, in another example, multiple units or components can
To combine or be desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or beg for
The mutual coupling, direct-coupling or communication connection of opinion can be through some communication interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of relay contact signal detection apparatus characterized by comprising signal pickup assembly, signal processing apparatus, control
Device, pressure controlling device, radio receiver and wireless base station apparatus processed；
The signal pickup assembly and the wireless base station apparatus are arranged in the convergence control cabinet of SF6 density monitor；
The control device connects with the signal processing apparatus, the pressure controlling device and the radio receiver respectively
It connects；
The control device is for controlling the pressure controlling device output pressure value to SF6 density monitor；The signal is adopted
Acquisition means are used to acquire the contact signal of the SF6 density monitor；
The wireless base station apparatus is used to the contact signal being sent to the radio receiver；
The radio receiver receives the contact signal that the wireless base station apparatus is sent；
The signal processing apparatus detects the contact signal, obtains testing result.
2. relay contact signal detection apparatus according to claim 1, which is characterized in that the radio receiver with
And the wireless base station apparatus includes: any one in blue-tooth device, ZigBee device and RoLa device.
3. relay contact signal detection apparatus according to claim 1, which is characterized in that the signal pickup assembly is
Calipers pulse current detector.
4. relay contact signal detection apparatus according to claim 1, which is characterized in that the radio receiver with
It is detachably connected between the control device.
5. relay contact signal detection apparatus according to claim 1, which is characterized in that further include: data display dress
It sets and signal prompt device；
The data presentation device and the signal prompt device are connect with the control device；
The data presentation device is for showing the testing result；
The signal prompt device is for prompting verification state.
6. relay contact signal detection apparatus according to claim 5, which is characterized in that the data presentation device is
LED liquid-crystal display.
7. relay contact signal detection apparatus according to claim 5, which is characterized in that the signal prompt device packet
It includes: light emitting diode and loudspeaker；
The light emitting diode is used to carry out light prompt to the verification state；
The loudspeaker is used to carry out auditory tone cues to the verification state.
8. a kind of relay contact signal detection system characterized by comprising pressure source device, verification gas piping interface,
The convergence control cabinet of SF6 density monitor and the relay contact signal supervisory instrument as described in claim 1-7；
The pressure source device is connect with the relay contact signal supervisory instrument；
The verification gas piping interface is connect with the relay contact signal supervisory instrument；
Connect by wireless communication between the convergence control cabinet of the SF6 density monitor and the relay contact signal supervisory instrument
It connects；
The pressure source device is used to provide gas by the verification gas piping interface for SF6 density monitor.
9. relay contact signal detection system according to claim 8, which is characterized in that the SF6 density monitor
Convergence control cabinet on be additionally provided with transmission antenna.
10. relay contact signal detection system according to claim 8, which is characterized in that the SF6 density monitor
Receiving antenna is additionally provided on contact signal calibration equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811632515.8A CN109521360A (en) | 2018-12-28 | 2018-12-28 | Relay contact signal detection apparatus and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811632515.8A CN109521360A (en) | 2018-12-28 | 2018-12-28 | Relay contact signal detection apparatus and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542854A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Online calibration method of gas density relay |
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