CN202929457U - In-transit impact vibration wireless real-time monitoring system for electrical power large equipment - Google Patents

In-transit impact vibration wireless real-time monitoring system for electrical power large equipment Download PDF

Info

Publication number
CN202929457U
CN202929457U CN2012206235543U CN201220623554U CN202929457U CN 202929457 U CN202929457 U CN 202929457U CN 2012206235543 U CN2012206235543 U CN 2012206235543U CN 201220623554 U CN201220623554 U CN 201220623554U CN 202929457 U CN202929457 U CN 202929457U
Authority
CN
China
Prior art keywords
time monitoring
impact shock
wireless real
electric power
wireless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2012206235543U
Other languages
Chinese (zh)
Inventor
杨北革
任远
高明
张晓鹏
段小兵
郭小龙
梁利生
张金梅
梁俊媛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Datong Power Supply Co of State Grid Shanxi Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Datong Power Supply Co of State Grid Shanxi Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Datong Power Supply Co of State Grid Shanxi Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN2012206235543U priority Critical patent/CN202929457U/en
Application granted granted Critical
Publication of CN202929457U publication Critical patent/CN202929457U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Landscapes

  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The utility model provides an in-transit impact vibration wireless real-time monitoring system for electrical power large equipment, and the impact vibration wireless real-time monitoring system belongs to the technical field of electrical power large equipment transportation and monitoring. The technical problem to be solved is to provide a device capable of carrying out long-time accurate wireless monitoring on the in-transit impact vibration of electrical power large equipment. The adopted technical scheme is that: the impact vibration wireless real-time monitoring system comprises a centralized controller, a router and an impact vibration wireless real-time monitoring device, wherein the centralized controller is mounted in a cab of an electrical power large equipment transport vehicle, the router is mounted on the top end of the electrical power large equipment, and the impact vibration wireless real-time monitoring device is mounted on the front end or rear end of the electrical power large equipment; the centralized controller, the router and the impact vibration wireless real-time monitoring device are communicated through a wireless network; and the centralized controller stores information sent by the router and the impact vibration wireless real-time monitoring device, and the impact vibration wireless real-time monitoring device comprises a high-precision impact vibration sensor used for acquiring the in-transit impact vibration of the electrical power large equipment. The impact vibration wireless real-time monitoring system is suitable for the transportation of various electrical power large equipment.

Description

Large of a kind of electric power impact shock wireless real-time monitoring in transit system
Technical field
Large of a kind of electric power of the utility model impact shock wireless real-time monitoring in transit system belongs to large transport monitoring technical field of electric power.
Background technology
for large transportation of power equipment, National Development and Reform Committee issues DL/T 1071-2007 " large transportation standard of electric power " in July, 2007, and in coming into effect Dec 1 then, this standard from aspects such as transport items organizational structure, hauling operation flow process, early-stage preparations, organizing and implementing and project conclusions to electric power large transportation done the regulation of process, large scale electrical power unit is the basic building block that forms intelligent grid, have overlength, super wide, overweight characteristics, and self-value is high, the production cycle is long, in case transit link generation safety, quality accident will cause serious direct loss and inestimable indirect loss, the capital construction of intelligent grid is just by power sourcing equipment one by one, transportation, install, the detailed process of operation realizes, the transportation of power equipment is the test to limit traffic condition, transportation is impacted and not only can be caused transformer to damage, and more seriously will greatly jeopardize transportation safety, for this reason, will be to the impact in transportation, vibration, the acceleration Real Time Monitoring is to guarantee transportation safety, do not relate to and utilize technological means the power equipment shipping mass to be carried out the description of management and control, in the practical operation of large transportation of electric power, also have no research and application about the online management and control information system of power equipment shipping mass.
some comparatively general monitoring device of transportation of present domestic use are all mechanical equipment, mainly contain mechanical bump recorder, its inner structure is equivalent to a camera, its principle of work is that recording paper strip is put into upper paper bag reel, the top of paper tape inserts lower paper bag reel, 3 recording pointers are fixed on metal beam on paper bag, they are used for respectively recording x, y, impulsive force on z three axles, lattice are arranged on paper tape, the lattice number of reading just can reflect the degree of being hit, both sides are free, be used for recording the time of being clashed into, also having a kind of is exactly the registering instrument of showing the meter type, it can not writing time, can only count to show maximum impact degree by table, obviously, all there are some defectives in these equipment:
One, because of the difference of means of transportation, sometimes may be because the reasons such as vibration amplitude is too large, and the time is oversize cause recording chart to be finished, the travel position of recording unit, cause loss of data fully, and the scope of measurement is narrower;
Two, complex structure, not portable, be unfavorable for the long-distance transport of equipment;
Three, recording chart may paper jam phenomenon occur because making moist in transportation, causes loss of data.
The external own equipment that drops into carrier has the g-109 accelerograph of Switzerland at present, it can measure x by the time interval that the user sets, y, the bare maximum of z 3-axis acceleration, in addition, it also can calculate the vector of mean value, maximal value, minimum value and the 3-axis acceleration of transportation equipment acceleration, this accelerograph is mainly used in the collision in transportation, the detection record of shock and vibration, transport road conditions emulation by computing machine again after being transported to the destination, yet also there are some defectives in these equipment:
One, because of in transportation, the oversize memory space inadequate that causes of haulage time, the travel position of recording unit, cause loss of data fully;
Two, occur damaging at long-distance transport equipment, power down, the phenomenons such as loss of data can't be predicted, and open to the destination and find loss of data or imperfect;
Three, lower grade of exterior protection, dust, and fog, the impact of the factors such as rainwater causes equipment to work, and records wrong or device damage.
The utility model content
The utility model overcomes the deficiency that prior art exists, and technical matters to be solved is: the device that large impact shock in transit of a kind of accurate wireless monitoring power electric for a long time is provided.
for solving the problems of the technologies described above, the technical scheme that the utility model adopts is: large of a kind of electric power impact shock wireless real-time monitoring in transit system, comprise the Centralized Controller that is arranged on large haulage vehicle pilothouse of electric power, be arranged on the router and the impact shock wireless real-time monitoring device that is arranged on large front end of electric power or rear end on large top of electric power, above-mentioned Centralized Controller, all can pass through wireless network communication between router and impact shock wireless real-time monitoring device, the information that Centralized Controller storage router and impact shock wireless real-time monitoring device send,
Above-mentioned impact shock wireless real-time monitoring device include the high precision impact shock sensor that gathers large impact shock in transit of electric power be connected with high precision impact shock sensor for the treatment of processing and radio-frequency module with the data of wireless transmission impact shock information, described data processing and radio-frequency module are connected with router with Centralized Controller by wireless network.
described impact shock wireless real-time monitoring device also includes the signal condition amplifying circuit, dual bus asynchronous communication circuit, the power down preventing clock circuit, the program exception supervisory circuit, Flash memory circuit and power module, be serially connected with successively signal condition amplifying circuit and dual bus asynchronous communication circuit between above-mentioned high precision impact shock sensor and data processing and radio-frequency module, above-mentioned power down preventing clock circuit, the program exception supervisory circuit processes with data respectively with the Flash memory circuit and radio-frequency module is connected, power module is whole impact shock wireless real-time monitoring device power supply.
Described wireless network is the ZigBee wireless network.
Described data are processed and radio-frequency module adopts the CC2530 chip, and data are processed and radio-frequency module adopts the ZigBee2007/Pro agreement to communicate.
Described power module adopts the high-performance lithium battery.
Described impact shock wireless real-time monitoring device is encapsulated in a shell, and shell protection grade IP65 is provided with the single face magnetic of being convenient to install on shell.
The beneficial effect that the utility model compared with prior art has is:
One, the utility model adopts large transportation impact shock process in transit of high precision impact shock sensor complete monitoring electric power, and in real time the information that gathers is sent to the Centralized Controller storage by the ZigBee wireless network, can realize long-term high-precision wireless monitor, monitor for the impact shock in transit of large of electric power condition is provided, satisfy the transport monitoring demand of large of electric power;
Two, the utility model can send fault and warning message the very first time, reminds human pilot, can either accurately grasp shipping mass process in transit, facilitates again the operation of human pilot, has avoided the expansion of fault;
Three, the utility model device external structure is succinct, and degree of protection is high, and it is convenient to install and use, and need not to open transportation equipment, can be to the transportation equipment injury yet, and cost is lower.
Description of drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described in detail:
Fig. 1 is mounting structure schematic diagram of the present utility model;
Fig. 2 is electrical block diagram of the present utility model;
In figure: 1 is that large haulage vehicle of electric power, 2 is that large of electric power, 3 is that Centralized Controller, 4 is that router, 5 is that impact shock wireless real-time monitoring device, 6 is that high precision impact shock sensor, 7 is that data processing and radio-frequency module, 8 are that signal condition amplifying circuit, 9 is that dual bus asynchronous communication circuit, 10 is that power down preventing clock circuit, 11 is that program exception supervisory circuit, 12 is that Flash memory circuit, 13 is power module.
Embodiment
As shown in Figure 1, large of a kind of electric power of the utility model impact shock wireless real-time monitoring in transit system, comprise the Centralized Controller 3 that is arranged on large haulage vehicle 1 pilothouse of electric power, be arranged on the router four on electric power large 2 tops and be arranged on the impact shock wireless real-time monitoring device 5 of large 2 front ends of electric power or rear end, all can pass through wireless network communication between above-mentioned Centralized Controller 3, router four and impact shock wireless real-time monitoring device 5.
above-mentioned Centralized Controller 3 sends order to router four and impact shock wireless real-time monitoring device 5, the information that storage router 4 and impact shock wireless real-time monitoring device 5 send, router four mainly plays assistance information transmission, the length that electric power is large 2 is generally all long, adopt router four can increase the distance of signal transmission, also can be to being used for the judgement of failure message, when router four a period of time does not receive the information of impact shock wireless real-time monitoring device 5 transmissions, send failure message to Centralized Controller 3, large 2 impact shock information in transit of impact shock wireless real-time monitoring device 5 Real-time Collection electric power, and the impact shock information that gathers is sent to router four and Centralized Controller 3, the needs of large according to different electric power 2 transportation, impact shock wireless real-time monitoring device 5 can be equipped with a plurality of, be distributed in large of electric power 2 different position.
as shown in Figure 2, above-mentioned impact shock wireless real-time monitoring device 5 include the high precision impact shock sensor 6 that gathers large 2 impact shocks in transit of electric power be connected with high precision impact shock sensor 6 for the treatment of with data processing and the radio-frequency module 7 of wireless transmission impact shock information, data are processed and radio-frequency module 7 is connected with router four with Centralized Controller 3 by wireless network, large transportation impact shock process in transit of high precision impact shock sensor 6 complete monitoring electric power, and rely on data processing and radio-frequency module 7 in real time the information that gathers to be sent to router four and Centralized Controller 3 by wireless network.
Large 2 of described electric power inevitably can be subject to transportation and impact in transportation, transportation is impacted and might be caused large 2 inner core of electric power, coil, screen, cushion block etc. that displaced or distortion occur, thereby causes large 2 of electric power to damage; Large 2 of conventional electric power is with ± 3g impact acceleration the technical indicator directly perceived as impulsive control, also become simultaneously the requirement of large 2 Structural Strength Design of electric power, the actual requirement that the utility model has taken into full account large 2 transportation of electric power adopts high precision impact shock sensor 6, high precision impact shock sensor 6 ranges are ± 5g, precision can reach 0.1g, can satisfy the measurement requirement fully.
Described impact shock wireless real-time monitoring device 5 also includes signal condition amplifying circuit 8, dual bus asynchronous communication circuit 9, power down preventing clock circuit 10, program exception supervisory circuit 11, Flash memory circuit 12 and power module 13, be serially connected with successively signal condition amplifying circuit 8 and dual bus asynchronous communication circuit 9 between above-mentioned high precision impact shock sensor 6 and data processing and radio-frequency module 7, above-mentioned power down preventing clock circuit 10, program exception supervisory circuit 11 and Flash memory circuit 12 process with data respectively and radio-frequency module 7 is connected.
described wireless network is the ZigBee wireless network, described data are processed and radio-frequency module 7 adopts the CC2530 chip, data are processed and radio-frequency module 7 adopts the ZigBee2007/Pro agreement to communicate, the CC2530 chip is the core processor of impact shock wireless real-time monitoring device 5, utilize SMT technique, be operated in free 2.4G frequency range, realized intelligent networking short distance low-power consumption real-time radio transmission system, power supply power available adapter and two kinds of power supply plans of battery, power supply mode is flexible, large of electric power is harsh to traffic condition, very high to the data monitoring precision, the utility model Wireless Data Transmission passes through CRC check, sum check is adopted in the dual bus asynchronous serial communication, guarantee the accuracy of data, whole device communication distance can reach 100 meters, increasing distance as need can be by adding the router four expanding transmission distance.
Above-mentioned signal condition amplifying circuit 8 aims at the sensor data acquisition design, sensor signal is amplified, thereby can directly communicate by letter by Transistor-Transistor Logic level with CC2530, has reduced hardware costs.
above-mentioned power down preventing clock circuit 10 adopts DS1302 power down preventing clock chip, be responsible for data and add time tag, thereby the impact shock equipment defective of observation time directly perceived before having solved, DS1302 power down preventing clock chip can provide year, month, day, the time, minute, second, the information in week, number of days per month and the number of days in leap year can be adjusted automatically, the time data output format can be indicated by AM/PM and be determined to adopt 24 hours or 12 hours, when keeping data and clock information, power consumption is less than 1mW, communication mode is the I2C bus, above-mentioned CC2530 inside there is no the I2C bus protocol, be acquisition time parameter correctly, system adopts the method for the I/O pin Simulation with I 2C signal of CC2530, simulate the collection sequential that meets on 1302 clock data handbooks, reach the purpose of operating clock.
stability for the operation of assurance device program, prevent the program abnormal, and CC2530 is state and uncertain when powering on, this causes CC2530 correctly not work, for addressing this problem, the utility model has added program exception supervisory circuit 11, it is responsible for CC2530 is initialized as the state that certain is determined, this reseting logic needs a reset signal to work, the stability of reset signal and reliability have significant impact to the normal operation of CC2530, reset circuit can use simple rc reset, but rc reset can not guarantee any situation and all produce reliable and stable reset signal, so general occasion need to be used special reset chip, because CC2530 has relatively high expectations to ripple, instant response performance, the stability of clock source and the reliability of Power Supply Monitoring of power supply, system selects Power Supply Monitoring core SP706, make system's reliable reset, SP706 is the power monitoring chip that aims at microprocessor Design, when supply voltage during lower than the resetting voltage threshold values, SP706 will produce a reset signal, and in rising to 200ms higher than the threshold values that resets, supply voltage remains valid, the threshold voltage that resets of SP706 is 2.63V, produces reset signal when namely supply voltage is lower than 2.63V.
the reset signal of above-mentioned SP706 is low level, pin MR is the hand-reset input end, pin RESET is reset output terminal, when hand-reset pin MR is low level, pin RESET is output as low, cause system reset, WDO and WDI are respectively house dog output terminal and house dog counter O reset end, the rising edge of WDI pin and negative edge all can be with the house dog counter O resets, if the house dog counter is not carried out zero clearing in 1.6S, house dog output terminal WDO can export a low level pulse so, because WDO is connected with the MR pin, therefore, can make the low level of RST end output 200ms, thereby reset hardware system.
Above-mentioned Flash memory circuit 12 uses the serial Flash chip, and the serial Flash chip is low-power consumption Flash storer, and it uses pin still less to transmit data with respect to parallel Flash, has reduced space, power consumption and the cost of system, has very high cost performance; In addition, the read-write operation of serial Flash chip is very simple and easy, and it is miniature that these advantages make serial Flash be widely used in, the storage system of low-power consumption, the Flash chip of employing M25PE20 model in the utility model.
Traditional onboard system generally adopts Vehicular accumulator cell to power devices, in the utility model, power module 13 employing high-performance lithium batteries are 5 power supplies of impact shock wireless real-time monitoring device, make impact shock wireless real-time monitoring device 5 flexible for installation, can arbitrarily be arranged on any position of large 2 of electric power.
The utility model has been drafted the series of frames forms such as bridged frame, bridge joint response frame, Frame, command frame, command response frame and Trouble Report frame; When system starts, Centralized Controller 3 is set up the ZigBee wireless network, send bridged frame to master controller, report networking success, determine the network address, master controller judges whether the network address used after receiving bridged frame, select to add simultaneously the child node of network, then send the bridge joint response frame to Centralized Controller 3, if did not use the network address, keep original network address in the bridge joint response frame, if used the network address, distribute the new network address to Centralized Controller 3; Centralized Controller 3 receives signal selectively according to the order of master controller, and after child node added network success, sending node added incoming frame to master controller, the report log-on message, simultaneously, each child node by Frame to Centralized Controller 3 transmission information; The utility model can be revised parameter by command frame, comprises collection period, uploads the cycle etc., reports command execution information by the command response frame; When the faults such as the abnormal or electric weight of data layout is not enough appear in a certain child node, can send the fault frame, when a certain child node exits network, can withdraw from frame by sending node, the utility model is defaulted as all the period of time monitoring, monitoring per second maximum impact vibration values regularly reports, and reaches early warning value and accelerates data upload speed, and give the alarm, remind human pilot, both realized the heartbeat data transfer function, also reached the purpose of low-power consumption; The utility model data can be by the order remotely modifying, and device can be formulated corresponding monitoring parameters for large of different electric power 2 traffic conditions, makes the application of installation field more flexible.
Described impact shock wireless real-time monitoring device 5 is encapsulated in a shell, shell protection grade IP65 is provided with the single face magnetic of being convenient to install on shell, can be arranged on easily on large 2 of electric power by single face magnetic, need not to open transportation equipment, can be to the transportation equipment injury yet.

Claims (6)

1. large of electric power impact shock wireless real-time monitoring in transit system, it is characterized in that: comprise the Centralized Controller (3) that is arranged on large haulage vehicle of electric power (1) pilothouse, be arranged on the router (4) on electric power large (2) top and be arranged on the impact shock wireless real-time monitoring device (5) of large (2) front end of electric power or rear end, above-mentioned Centralized Controller (3), all can pass through wireless network communication between router (4) and impact shock wireless real-time monitoring device (5), the information that Centralized Controller (3) storage router (4) and impact shock wireless real-time monitoring device (5) send,
Above-mentioned impact shock wireless real-time monitoring device (5) include the high precision impact shock sensor (6) that gathers large (2) impact shock in transit of electric power be connected with high precision impact shock sensor (6) for the treatment of processing and radio-frequency module (7) with the data of wireless transmission impact shock information, described data processing and radio-frequency module (7) are connected with router (4) with Centralized Controller (3) by wireless network.
2. large of a kind of electric power according to claim 1 impact shock wireless real-time monitoring in transit system, it is characterized in that: described impact shock wireless real-time monitoring device (5) also includes signal condition amplifying circuit (8), dual bus asynchronous communication circuit (9), power down preventing clock circuit (10), program exception supervisory circuit (11), Flash memory circuit (12) and power module (13), be serially connected with successively signal condition amplifying circuit (8) and dual bus asynchronous communication circuit (9) between above-mentioned high precision impact shock sensor (6) and data processing and radio-frequency module (7), above-mentioned power down preventing clock circuit (10), program exception supervisory circuit (11) processes with data respectively with Flash memory circuit (12) and radio-frequency module (7) is connected, power module (13) is whole impact shock wireless real-time monitoring device (5) power supply.
3. large of a kind of electric power according to claim 1 and 2 impact shock wireless real-time monitoring in transit system, it is characterized in that: described wireless network is the ZigBee wireless network.
4. large of a kind of electric power according to claim 3 impact shock wireless real-time monitoring in transit system, it is characterized in that: described data are processed and radio-frequency module (7) adopts the CC2530 chip, and data are processed and radio-frequency module (7) adopts the ZigBee2007/Pro agreement to communicate.
5. large of a kind of electric power according to claim 2 impact shock wireless real-time monitoring in transit system, it is characterized in that: described power module (13) adopts the high-performance lithium battery.
6. large of a kind of electric power according to claim 3 impact shock wireless real-time monitoring in transit system, it is characterized in that: described impact shock wireless real-time monitoring device (5) is encapsulated in a shell, shell protection grade IP65 is provided with the single face magnetic of being convenient to install on shell.
CN2012206235543U 2012-11-23 2012-11-23 In-transit impact vibration wireless real-time monitoring system for electrical power large equipment Expired - Lifetime CN202929457U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012206235543U CN202929457U (en) 2012-11-23 2012-11-23 In-transit impact vibration wireless real-time monitoring system for electrical power large equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012206235543U CN202929457U (en) 2012-11-23 2012-11-23 In-transit impact vibration wireless real-time monitoring system for electrical power large equipment

Publications (1)

Publication Number Publication Date
CN202929457U true CN202929457U (en) 2013-05-08

Family

ID=48219400

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012206235543U Expired - Lifetime CN202929457U (en) 2012-11-23 2012-11-23 In-transit impact vibration wireless real-time monitoring system for electrical power large equipment

Country Status (1)

Country Link
CN (1) CN202929457U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102981473A (en) * 2012-11-23 2013-03-20 国家电网公司 On-road impact vibration wireless real-time monitoring system of large electric power item

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102981473A (en) * 2012-11-23 2013-03-20 国家电网公司 On-road impact vibration wireless real-time monitoring system of large electric power item

Similar Documents

Publication Publication Date Title
CN102981473B (en) On-road impact vibration wireless real-time monitoring system of large electric power item
CN104794933B (en) A kind of method for improving accuracy of geomagnetic parking stall detector
CN104882919B (en) It is a kind of based on the battery pack for being wirelessly transferred battery management system
CN102984245B (en) High-power transformer nitrogen pressure wireless real-time monitoring in transit system
CN105207836B (en) A kind of method of quick test PQDIF file consistences
CN202033416U (en) Electric energy measuring device
CN203118224U (en) Wireless terrestrial-magnetism vehicle detection device
CN202929457U (en) In-transit impact vibration wireless real-time monitoring system for electrical power large equipment
CN204210489U (en) Railway freight class row axle temperature wireless monitoring device
CN202929456U (en) In-transit biaxial tilt angle wireless real-time monitoring system for electrical power large equipment
CN105303799A (en) Wireless data collector
CN217931811U (en) Rail insulation integrated test recorder based on GPS time synchronization
CN205103310U (en) Electric energy metering subsystem adopting zigbee wireless sensor network
CN206849115U (en) Aluminium manufactures energy consumption automatic monitoring system
CN206640553U (en) A kind of voltage and current detection means based on photovoltaic panel
CN102968105B (en) Wireless and real-time monitoring system for large electrical power equipment in in-transit double-shaft inclination angle state
CN202931388U (en) In-transit nitrogen pressure wireless real-time monitoring system for large-scale transformer
CN201532459U (en) Electric quantity loss alarm and make up device
CN204885343U (en) Lithium power battery protection circuit based on internet of things
CN204789799U (en) Multichannel-based fault recording device on distribution line
CN209728460U (en) A kind of rail multi-parameter real-time monitoring device
CN202854916U (en) Real-time subway train data recording device
CN101570205B (en) Device for monitoring key instructions of electric train
CN202840692U (en) Intelligent grid collection terminal function detection system
CN206248833U (en) Logistics monitoring GPS track recorder during overlength

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20130508

Effective date of abandoning: 20150617

RGAV Abandon patent right to avoid regrant