CN204165581U - A kind of power cable parameter monitoring system - Google Patents
A kind of power cable parameter monitoring system Download PDFInfo
- Publication number
- CN204165581U CN204165581U CN201420079044.3U CN201420079044U CN204165581U CN 204165581 U CN204165581 U CN 204165581U CN 201420079044 U CN201420079044 U CN 201420079044U CN 204165581 U CN204165581 U CN 204165581U
- Authority
- CN
- China
- Prior art keywords
- temperature
- power cable
- positional information
- background server
- temperature data
- 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 - Fee Related
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000007797 corrosion Effects 0.000 claims description 19
- 238000005260 corrosion Methods 0.000 claims description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000002341 toxic gas Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009422 external insulation Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model embodiment discloses a kind of power cable parameter monitoring system, comprise: temperature measurement equipment, be arranged on the interface internal of power cable connector, gather the temperature data of place interface internal, and by wireless network, described temperature data and the positional information of self are sent to corresponding temperature receptacle; Described temperature receptacle, for being sent to background server by the described temperature data received, described positional information and the described corresponding relation determined; Described background server, for carrying out alarm operation when described temperature data is greater than interface temperature threshold value and indicating corresponding described positional information, visible, by there being the temperature sensor of wireless transmission data capability at the interface internal tool for mounting of power cable connector, the temperature data that can be collected by wireless network transmissions in real time thus and the positional information of collection point are to temperature receptacle, then be sent to background server by temperature receptacle to carry out processing and preserving, substantially increase efficiency.
Description
Technical field
The utility model relates to power domain, particularly relates to a kind of power cable parameter monitoring system.
Background technology
Power cable can electric energy transmitting, be used for for the Close-knit Habitation such as city, rural area power, what need long distance extends to city, each corner, rural for this reason, from the manufacture level of current power cable, the length of each root power cable is limited, therefore when a lot of long distance delivery electric energy, the power cable on landline is all be spliced by the power cable of finite length one by one.When carrying out electric power transfer, the temperature of the stitching portion of power cable interface in other words can be higher, than being easier to occur because the overheated problem such as burning, short circuit caused.
The method of the temperature data at current collection power cable interface place needs staff to go to scene closely to gather, but power cable is generally all arranged on the place being not easy to touch, such as be erected at the eminence of high tension electric tower, or be embedded in underground, cause collection efficiency of getting up very low like this, but also with higher danger.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of power cable parameter monitoring system, realizes wireless collection, improves collecting efficiency.
The utility model embodiment discloses following technical scheme:
A kind of power cable parameter monitoring system, comprising:
Temperature measurement equipment, is arranged on the interface internal of power cable connector, for gathering the temperature data of place interface internal, and by wireless network, described temperature data and the positional information of self is sent to corresponding temperature receptacle;
Described temperature receptacle, for receiving the described temperature data of temperature measurement equipment transmission described at least one in self signal cover and described positional information, and determine the corresponding relation of temperature data and the positional information sent by same temperature measurement equipment, the described temperature data received, described positional information and the described corresponding relation determined are sent to background server;
Described background server, for receiving and preserve described temperature data, described positional information and described corresponding relation that described temperature receptacle sends, and carry out alarm operation when described temperature data is greater than interface temperature threshold value and indicate corresponding described positional information.
Preferably, also environment temperature sensor is comprised:
Described environment temperature sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the environment temperature of described connector outside, and send alerting signal and self identification information when described environment temperature is greater than environment temperature threshold value to described background server.
Preferably, height of water level sensor is also comprised:
Described height of water level sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the height of water level in described cable shaft, and send alerting signal and self identification information when described height of water level is greater than watermark threshold to described background server.
Preferably, degree of corrosion sensor is also comprised:
It is outside that described degree of corrosion sensor is arranged on the power cable had in the cable shaft of power cable connector, for gathering the degree of corrosion of the liquid of power cable described in submergence, when described degree of corrosion is greater than degree of corrosion threshold value, transmission alerting signal and self identification information are to described background server.
Preferably, also gas sensor is comprised:
Described gas sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the specific gas concentration of gas in described cable shaft, when described specific gas concentration meets gas concentration threshold, transmission alerting signal and self identification information are to described background server.
Preferably,
Described specific gas concentration to comprise in oxygen concentration, concentration of toxic gases and combustable gas concentration any one or multiple combination.
Preferably,
Described positional information comprises longitude and latitude degree coordinate, power cable line title and phase condition.
As can be seen from technique scheme, by there being the temperature sensor of wireless transmission data capability at the interface internal tool for mounting of power cable connector, the temperature data that can be collected by wireless network transmissions in real time thus and the positional information of collection point are to temperature receptacle, then be sent to background server by temperature receptacle by the form such as wired to carry out processing and preserving, thus do not need manually to remove collection in worksite again, substantially increase efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is one of system construction drawing of a kind of power cable parameter monitoring system of the utility model;
Fig. 2 is the system construction drawing two of a kind of power cable parameter monitoring system of the utility model;
Fig. 3 is the system construction drawing three of a kind of power cable parameter monitoring system of the utility model;
Fig. 4 is the system construction drawing four of a kind of power cable parameter monitoring system of the utility model;
Fig. 5 is the system construction drawing five of a kind of power cable parameter monitoring system of the utility model.
Embodiment
Power cable (power cable) is the cable for transmitting and distribute electric energy.Be usually used in Urban Underground electrical network, the lead line of power house, the in-line power of industrial and mining enterprises and cross river, excessively extra large submarine transmission line.Power cable is in order to transmission and the cable product distributing high-power power in the basic routing line of electric system, comprising 1-500KV and above various electric pressure, and the power cable of various insulation.Under the existing temperature obtaining mode that manually closely must gather power cable connector temperature to scene, work efficiency is very low, and a lot of power cable is all in field, work under bad environment.The utility model embodiment provides a kind of power cable parameter monitoring system, by there being the temperature sensor of wireless transmission data capability at the interface internal tool for mounting of power cable connector, the temperature data that can be collected by wireless network transmissions in real time thus and the positional information of collection point are to temperature receptacle, then be sent to background server by temperature receptacle by the form such as wired to carry out processing and preserving, thus do not need manually to remove collection in worksite again, substantially increase efficiency.
Power cable great majority are embedded in underground, a cable shaft is had every one section, staff can be allowed down work such as carrying out daily servicing, the technical solution of the utility model has been installed environment temperature sensor, height of water level sensor, degree of corrosion sensor and gas sensor etc. further and has been gathered parameters in the working environment of power cable in cable shaft, and send alerting signal when the parameter collected satisfies condition, allow background server can Timeliness coverage problem thus, to process early.
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail the utility model embodiment below in conjunction with accompanying drawing.
Embodiment one
Refer to Fig. 1, it is one of system construction drawing of a kind of power cable parameter monitoring system of the utility model, and this system comprises:
Temperature measurement equipment 101, is arranged on the interface internal of power cable connector, for gathering the temperature data of place interface internal, and by wireless network, described temperature data and the positional information of self is sent to corresponding temperature receptacle 102;
Here it should be noted that, described power cable connector can refer to the intermediate head in cable, also can be the interface between cable and other-end, or the junction of other power cable interior metal conductors.Described temperature measurement equipment can be a kind of special built-in thermometric chip in technical solutions of the utility model, be arranged on cable inside, namely inside cable outer layer insulation course, thus can when external interference is minimum, directly gather, obtain the temperature data closest to described connector temperature originally.Reach the heat condition measuring each phase joint location in real time.But also the data collected can be sent to the temperature receptacle being in easy approximated position by the wireless transmission function of self, eliminate the arduous of artificial collection originally thus.
Also it should be noted that, described positional information can comprise longitude and latitude degree coordinate, power cable line title and phase condition in the utility model, can be other the form of expression, as long as can determine present position.
Described temperature receptacle 102, for receiving the described temperature data of temperature measurement equipment transmission described at least one in self signal cover and described positional information, and determine the corresponding relation of temperature data and the positional information sent by same temperature measurement equipment, the described temperature data received, described positional information and described corresponding relation are sent to background server;
Here it should be noted that, described temperature receptacle can be a small-sized wireless signal station, there is certain signal cover, such as covering radius is not from 100m to several kilometers etc., a described temperature measurement equipment 101 is at least there is in signal cover, after said temperature receiver obtains the temperature data of described temperature measurement equipment transmission, set up the corresponding relation between the positional information simultaneously sended over, like this in follow-up data processing procedure, clearly can know which temperature data is from which station acquisition, how the line name of that position and phase condition are all, thus when going wrong or need to safeguard, can locate fast and accurately, raise the efficiency.
Described background server 103, for receiving and preserve described temperature data, described positional information and described corresponding relation that described temperature receptacle sends, and carry out alarm operation when described temperature data is greater than interface temperature threshold value and indicate corresponding described positional information.
Here it should be noted that, described background server can be understood as the control center being in far-end, generally has powerful data receiver, process and hold capacity.Background server generally can be responsible for controlling a slice power cable system, for example, a block in city, block even commercial center etc.In embodiment as shown in Figure 1, shown in background server can (be generally the upper limit of power cable operating temperature ratings by the temperature parameter received and a default interface temperature threshold value, such as some cable the highlyest can not exceed 90 DEG C etc.) compare, operating temperature ratings has been exceeded once the temperature parameter received, just give the alarm operation, to point out staff to process, such as power-off etc., in order to avoid therefore there is the accident such as the condition of a fire or short circuit.
Except needing the temperature of real-time monitoring power electric cable connector, a lot of power cable great majority are embedded in underground, a cable shaft is had every one section, staff can be allowed down work such as carrying out daily servicing, relative to more airtight in cable shaft, its environmental factor is also larger on the power cable impact be placed on wherein, therefore also belongs to the parameter closely bound up with power cable to the parameters in cable shaft, and same needs are effectively monitored.Therefore preferred, aforementioned embodiment illustrated in fig. 1 in device can further include environment temperature sensor 200, as shown in Figure 2:
Described environment temperature sensor 200 is arranged on to be had in the cable shaft of power cable connector, for gathering the environment temperature of described connector outside, and send alerting signal and self identification information when described environment temperature is greater than environment temperature threshold value to described background server.
Here it should be noted that, relatively airtight in cable shaft, environmental parameter generally can maintain a comparatively stable state, if because some reasons make the temperature in cable shaft too high, so this high-temperature can maintain long time, the softening aging of the external insulation layer of power cable can be caused like this, bring hidden danger thus, environment temperature sensor can find the problem that environment temperature is too high timely and point out the staff at rear, and the self identification information sent with alerting signal can also help the accurate localized accident point of staff.
Preferably, aforementioned embodiment illustrated in fig. 1 in device can further include height of water level sensor 300, as shown in Figure 3:
Described height of water level sensor 300 is arranged on to be had in the cable shaft of power cable connector, for gathering the height of water level in described cable shaft, and send alerting signal and self identification information when described height of water level is greater than watermark threshold to described background server.
Here it should be noted that, relatively airtight in cable shaft, environmental parameter generally can maintain a comparatively stable state, if the problems such as cable shaft leaks are by some or all of for power cable wherein submergence, long immersion also can bring the external insulation layer of power cable and to a certain degree damage, and also can be a kind of working environment of comparatively inconvenience to the staff of lower well servicing, , height of water level sensor can find the height of water level in cable shaft timely, and the staff at rear is pointed out when water level is too high, to make staff, (such as carrying or dress suitable equipment) is done some preparations to the working environment faced by possibility, the self identification information sent with alerting signal can also help the accurate localized accident point of staff.
Preferably, aforementioned embodiment illustrated in fig. 1 in device can further include degree of corrosion sensor 400, as shown in Figure 4:
It is outside that described degree of corrosion sensor 400 is arranged on the power cable had in the cable shaft of power cable connector, for gathering the degree of corrosion of the liquid of power cable described in submergence, when described degree of corrosion is greater than degree of corrosion threshold value, transmission alerting signal and self identification information are to described background server.
Here it should be noted that, there is a large amount of power electronic devices in cable shaft, when after water inlet, may cause in liquid, there is certain corrosive substance owing to soaking, breakneck to the external insulation layer of power cable under so long immersion, and concerning the harm that also may bring the staff gone into the well on health, during historical facts or anecdotes, determine in water degree of corrosion accurately and be that very crucial is also necessary.In water degree of corrosion too high in prompting rear staff, to make staff do some preparations (such as carrying or dress suitable equipment) to the working environment faced by possibility, the self identification information sent with alerting signal can also help the accurate localized accident point of staff.
Preferably, aforementioned embodiment illustrated in fig. 1 in device can further include gas sensor 500, as shown in Figure 5:
Described gas sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the specific gas concentration of gas in described cable shaft, when described specific gas concentration meets gas concentration threshold, transmission alerting signal and self identification information are to described background server.
Wherein, preferably, described specific gas concentration to comprise in oxygen concentration, concentration of toxic gases and combustable gas concentration any one or multiple combination.
It should be noted that, relatively airtight in cable shaft, air flow property is very low, in the event of the flue gas that the Leakage Gas in the course of work or burning cause, the staff of the air in cable shaft to lower well servicing can be made to bring harm, even can be in peril of one's life time serious, therefore determine that the concentration of specific gas in the air in cable shaft is vital, these specific gas mainly comprise the oxygen of maintenance personnel breathing and the toxic gas of harmful to human, also comprise and may cause inflammable gas exploded etc. because of naked light.In cable shaft in air specific gas concentration too high in prompting rear staff, to make staff do some preparations (such as carrying or dress suitable equipment) to the working environment faced by possibility, the self identification information sent with alerting signal can also help the accurate localized accident point of staff.
Background server needs to process the local monitor data in a large amount of place, therefore if a power cable network topological diagram can be set up staff can be allowed to monitor whole power cable system more intuitively, the alerting signal of displaying also can allow staff's quick obtaining effective information and determine accident point position.
Preferably, described background server obtains power cable network topological diagram according to the described positional information received, and is shown the position of the described alerting signal received corresponding described identification information on described power cable network topological diagram.
As can be seen from the above-described embodiment, by there being the temperature sensor of wireless transmission data capability at the interface internal tool for mounting of power cable connector, the temperature data that can be collected by wireless network transmissions in real time thus and the positional information of collection point are to temperature receptacle, then be sent to background server by temperature receptacle by the form such as wired to carry out processing and preserving, thus do not need manually to remove collection in worksite again, substantially increase efficiency.
Environment temperature sensor, height of water level sensor, degree of corrosion sensor and gas sensor etc. are installed further in cable shaft and have gathered parameters in the working environment of power cable, and send alerting signal when the parameter collected satisfies condition, allow background server can Timeliness coverage problem thus, to process early.
It should be noted that, one of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random AccessMemory, RAM) etc.
Above a kind of power cable parameter monitoring system provided by the utility model is described in detail, apply specific embodiment herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands core concept of the present utility model for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (7)
1. a power cable parameter monitoring system, is characterized in that, comprising:
Temperature measurement equipment, is arranged on the interface internal of power cable connector, for gathering the temperature data of place interface internal, and by wireless network, described temperature data and the positional information of self is sent to corresponding temperature receptacle;
Described temperature receptacle, for receiving the described temperature data of temperature measurement equipment transmission described at least one in self signal cover and described positional information, and determine the corresponding relation of temperature data and the positional information sent by same temperature measurement equipment, the described temperature data received, described positional information and the described corresponding relation determined are sent to background server;
Described background server, for receiving and preserve described temperature data, described positional information and described corresponding relation that described temperature receptacle sends.
2. system according to claim 1, is characterized in that, also comprises environment temperature sensor:
Described environment temperature sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the environment temperature of described connector outside, and send alerting signal and self identification information when described environment temperature is greater than environment temperature threshold value to described background server.
3. system according to claim 1, is characterized in that, also comprises height of water level sensor:
Described height of water level sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the height of water level in described cable shaft, and send alerting signal and self identification information when described height of water level is greater than watermark threshold to described background server.
4. system according to claim 1, is characterized in that, also comprises degree of corrosion sensor:
It is outside that described degree of corrosion sensor is arranged on the power cable had in the cable shaft of power cable connector, for gathering the degree of corrosion of the liquid of power cable described in submergence, when described degree of corrosion is greater than degree of corrosion threshold value, transmission alerting signal and self identification information are to described background server.
5. system according to claim 1, is characterized in that, also comprises gas sensor:
Described gas sensor is arranged on to be had in the cable shaft of power cable connector, for gathering the specific gas concentration of gas in described cable shaft, when described specific gas concentration meets gas concentration threshold, transmission alerting signal and self identification information are to described background server.
6. system according to claim 5, is characterized in that,
Described specific gas concentration to comprise in oxygen concentration, concentration of toxic gases and combustable gas concentration any one or multiple combination.
7. system according to claim 1, is characterized in that,
Described positional information comprises longitude and latitude degree coordinate, power cable line title and phase condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420079044.3U CN204165581U (en) | 2014-02-24 | 2014-02-24 | A kind of power cable parameter monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420079044.3U CN204165581U (en) | 2014-02-24 | 2014-02-24 | A kind of power cable parameter monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204165581U true CN204165581U (en) | 2015-02-18 |
Family
ID=52539260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420079044.3U Expired - Fee Related CN204165581U (en) | 2014-02-24 | 2014-02-24 | A kind of power cable parameter monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204165581U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398722A (en) * | 2020-04-14 | 2020-07-10 | 西安交通大学 | Equipment for on-site measurement of transmission characteristics of power cable |
| CN111982192A (en) * | 2020-08-11 | 2020-11-24 | 国家电网有限公司技术学院分公司 | Cable fault self-learning identification method and system based on Internet of things |
-
2014
- 2014-02-24 CN CN201420079044.3U patent/CN204165581U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398722A (en) * | 2020-04-14 | 2020-07-10 | 西安交通大学 | Equipment for on-site measurement of transmission characteristics of power cable |
| CN111982192A (en) * | 2020-08-11 | 2020-11-24 | 国家电网有限公司技术学院分公司 | Cable fault self-learning identification method and system based on Internet of things |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108343844B (en) | Multi-parameter modular oil and gas pipeline safety monitoring system and method | |
| CN108591834A (en) | A kind of pepe monitoring system | |
| CN110630910A (en) | Urban underground gas pipeline monitoring system | |
| CN105156906A (en) | Intelligent natural gas remote monitoring and management system | |
| CN103344885A (en) | High-voltage single-core cable protective covering grounding online monitoring device and control method | |
| CN103512670A (en) | A wireless temperature measurement system based on a radio frequency technique | |
| CN204165581U (en) | A kind of power cable parameter monitoring system | |
| CN110896197A (en) | Transformer substation cable trench online monitoring method and system based on Internet of things technology | |
| CN203258379U (en) | Gas valve well monitoring and warning device | |
| CN102455688A (en) | Locating water immersion control system | |
| CN108362446A (en) | A kind of method for detecting leakage, device and leakage detection system | |
| CN103822663A (en) | Power cable parameter monitoring system | |
| CN206991097U (en) | A kind of dangerous information Autonomous test electrical control cubicles | |
| CN104504881A (en) | Remote pipeline data collecting and processing system | |
| CN204988339U (en) | Computer lab environmental monitoring device | |
| CN110748801A (en) | Pipeline leakage detection method, device and system | |
| CN105445592A (en) | Novel intelligent bus management system | |
| CN203323879U (en) | On-line monitoring system for joint temperature of plugging bus | |
| CN204965160U (en) | Intelligent building monitored control system | |
| CN205537770U (en) | Underground piping monitor terminal | |
| CN204315067U (en) | Remote Pipe data acquisition processing system | |
| CN105203858A (en) | Solar power supply wireless transmission type oil product electrostatic online monitor and monitoring method thereof | |
| CN212258247U (en) | Transformer substation cable trench online monitoring system based on Internet of things technology | |
| CN107203180A (en) | A kind of cooling tower monitoring method, equipment and system | |
| CN212433929U (en) | Gas leakage alarm system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20170224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |