CN111065047A - IBeacons-based transformer substation security management method and system - Google Patents
IBeacons-based transformer substation security management method and system Download PDFInfo
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- CN111065047A CN111065047A CN201911251116.1A CN201911251116A CN111065047A CN 111065047 A CN111065047 A CN 111065047A CN 201911251116 A CN201911251116 A CN 201911251116A CN 111065047 A CN111065047 A CN 111065047A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The invention relates to the technical field of electric power, in particular to a transformer substation safety management method and a transformer substation safety management system based on iBeacons, which comprise the following steps: a user statically scans the states of peripheral iBeacons nodes through handheld equipment and obtains the signal strength values of the peripheral iBeacons nodes; selecting four iBeacons nodes with the maximum signal intensity value, and calculating the distances between the four iBeacons nodes and the handheld equipment respectively according to the signal intensity value; taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm; and carrying out coordinate division on the plane of the transformer substation into an electrified region and a non-electrified region, and sending warning information to the user when the position of the user is in the electrified region. The invention has the beneficial effects that: the phenomenon that the transformer substation mistakenly enters a live area can be greatly reduced, the safety of personnel, a power grid and equipment is ensured, and the potential safety hazard of the transformer substation is eliminated to a certain extent; the iBeacons node is powered by the button battery, wiring is not needed, the node is more convenient to arrange, and cost is saved.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a transformer substation safety management method and system based on iBeacons.
Background
At present, an outdoor satellite positioning technology is mature, but generally, an indoor environment is relatively closed and complex, most satellites cannot be covered effectively, and besides, the positioning error of the outdoor satellite positioning technology is large and is often about 10m, which obviously cannot meet the positioning requirement of a transformer substation.
Currently, the small-range positioning technologies are various, such as wireless local area network (wlan), radio frequency tag (RFID), ultraviolet (Zifbee), Bluetooth (Bluetooth), geomagnetic field intensity, infrared positioning, optical tracking positioning, computer vision positioning, ultrasonic positioning, and the like. Although the existing indoor positioning technologies such as WLAN, ultra-fast band radio, etc. achieve local indoor high-precision positioning, the positioning cost is relatively high.
Disclosure of Invention
In order to solve the problems, the invention provides a transformer substation safety management method and system based on iBeacons.
A transformer substation safety management method based on iBeacons comprises the following steps:
a user statically scans the states of peripheral iBeacons nodes through handheld equipment and obtains the signal strength values of the peripheral iBeacons nodes;
selecting four iBeacons nodes with the maximum signal intensity value, and calculating the distances between the four iBeacons nodes and the handheld equipment respectively according to the signal intensity value;
taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm;
and carrying out coordinate division on the plane of the transformer substation into an electrified region and a non-electrified region, and sending warning information to the user when the position of the user is in the electrified region.
Preferably, the calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal strength value includes: calculating the distance d between the iBeacons node and the handheld device:
d＝10^((ABS(RSSI)-A)/(10*n))，
where RSSI represents the signal strength value, a represents the absolute value of the signal strength value at 1 meter from the mobile device, and n represents the environmental attenuation factor.
Preferably, the method further comprises the following steps: and generating a motion track according to the real-time user position and displaying the motion track on a coordinate map.
An iBeacons-based substation security management system, comprising:
the handheld device is used for scanning the states of the peripheral iBeacons nodes and obtaining the signal intensity values of the peripheral iBeacons nodes;
the calculation module is used for selecting the four iBeacons nodes with the maximum signal intensity value and calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal intensity value; taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm;
the map module is used for carrying out coordinate division on a transformer substation plane into an electrified area and a non-electrified area;
and the alarm module is used for sending warning information to the user when the position of the user is in the electrified area.
Preferably, the calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal strength value includes: calculating the distance d between the iBeacons node and the handheld device:
d＝10^((ABS(RSSI)-A)/(10*n))，
where RSSI represents the signal strength value, a represents the absolute value of the signal strength value at 1 meter from the mobile device, and n represents the environmental attenuation factor.
Preferably, the map module is further configured to generate a motion trajectory according to the real-time user position and display the motion trajectory on the coordinate map.
The invention has the beneficial effects that: the method comprises the steps of dividing an electrified region in a transformer substation, accurately calculating the position of a user through a secondary weighted centroid algorithm, and automatically sending a safety warning signal when the user is in the electrified region. By the mode, the phenomenon that the transformer substation mistakenly enters a live area can be greatly reduced, the safety of personnel, a power grid and equipment is ensured, and the potential safety hazard of the transformer substation is eliminated to a certain extent; the iBeacons node is powered by the button battery, wiring is not needed, the node is more convenient to arrange, and cost is saved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic flowchart of steps S1 to S4 of a substation security management method based on iBeacons according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a substation security management method step S5 based on iBeacons according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a substation security management system based on iBeacons according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The basic idea of the invention is to divide the electrified region in the transformer substation, accurately calculate the position of the user through a secondary weighted centroid algorithm, and automatically send a safety warning signal when the user is in the electrified region. By the mode, the phenomenon that the transformer substation mistakenly enters the electrified area can be greatly reduced, the safety of personnel, a power grid and equipment is ensured, and the potential safety hazard of the transformer substation is eliminated to a certain extent.
As shown in fig. 1, a transformer substation security management method based on iBeacons includes the following steps:
s1: a user statically scans the states of peripheral iBeacons nodes through handheld equipment and obtains the signal strength values of the peripheral iBeacons nodes;
s2: selecting four iBeacons nodes with the maximum signal intensity value, and calculating the distances between the four iBeacons nodes and the handheld equipment respectively according to the signal intensity value;
s3: taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm;
s4: and carrying out coordinate division on the plane of the transformer substation into an electrified region and a non-electrified region, and sending warning information to the user when the position of the user is in the electrified region.
iBeacon is a very accurate micro-positioning technique via bluetooth low energy technology. The technical equipment can receive signals sent by other iBeacons in a certain range, and can transmit the position information of the user to other users in a certain range. All devices carrying versions above bluetooth 4.0 and iOS7 can act as transmitters and receivers for iBeacons technology.
The iBeacons technology has the advantages that the transmission distance is very far and can reach 50m at most, of course, the recommended maximum distance is 10m for the transmission effect, and the data transmission speed of the iBeacons technology is very high. Most importantly, the iBeacons node equipment is small and exquisite, and can be placed in any indoor space, and the iBeacons node is powered by a button battery without wiring, so that the node is more convenient to arrange, and the cost is saved.
In order to reduce the positioning error, when a user is positioned, the user needs to statically acquire the signal strength value of each iBeacons node. Calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal strength value comprises the following steps: calculating the distance d between the iBeacons node and the handheld device:
d＝10^((ABS(RSSI)-A)/(10*n))，
where RSSI represents the signal strength value, a represents the absolute value of the signal strength value at 1 meter from the mobile device, and n represents the environmental attenuation factor.
Specifically, the method for calculating the current user position by using four iBeacons nodes as anchor nodes and utilizing a quadratic weighted centroid algorithm comprises the following steps:
put forward the constraint condition, set antenna A1、A2、A3、A4The distances to the origin of coordinates are d1、d2、d3、d4(ii) a User positions A to A2、A1To A3、A2To A4、A3To A4Are respectively D1、D2、D3、D4The line segments can form a plurality of triangles, and some constraint conditions can be obtained according to the principle that the sum of two sides of each triangle is larger than the sum of the third side of each triangle.
Selecting weight factors, wherein due to the introduction of an error value, a calculation result is not a determined position, but the intersection of three circles carries out first weighting on three points on the intersection, and the weight factors are respectively:
w11＝(d2+d3)/2(d1+d2+d3)，
w12＝(dl+d3)/2(d1+d2+d3)，
w13＝(d1+d2)/2(d1+d2+d3)，
carrying out dual weighted centroid positioning algorithm calculation, and calculating M by using centroid algorithm after weighting1(xg1，yg1) The estimated values of M can be obtained by the same method2(xg2，yg2)、M3(xg3，yg3)、M4(xg4，yg2) And introducing a secondary weighting factor to carry out secondary weighting, and carrying out secondary weighted centroid calculation on the four estimated points according to the proposed secondary weighting factor to finally obtain the final estimated position of the user position M.
The transformer substation plane is divided into an electrified region and a non-electrified region through coordinates, when the position of a user is in the electrified region, warning information is sent to the user, the safety of the person, a power grid and equipment is guaranteed, and potential safety hazards of the transformer substation are eliminated to a certain extent. The warning information can be sent by voice, and text information can also be sent to a handheld terminal of a user.
As a preferred example of this embodiment, as shown in fig. 2, a substation security management method based on iBeacons further includes the following steps:
s5: and generating a motion track according to the real-time user position and displaying the motion track on a coordinate map.
After the position of the user is obtained, the position of the transformer substation constructor, the operation and maintenance personnel and the overhaul personnel can be known by the monitoring end in time according to the coordinate corresponding to the position displayed on the map. Furthermore, a motion track is generated according to the real-time user position and is displayed on the coordinate map, so that the position for reaching can be inquired according to the motion track.
Correspondingly, this embodiment also provides an iBeacons-based substation security management system, as shown in fig. 3, including: the handheld device is used for scanning the states of the peripheral iBeacons nodes and obtaining the signal intensity values of the peripheral iBeacons nodes; the calculation module is used for selecting the four iBeacons nodes with the maximum signal intensity value and calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal intensity value; taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm; the map module is used for carrying out coordinate division on a transformer substation plane into an electrified area and a non-electrified area; and the alarm module is used for sending warning information to the user when the position of the user is in the electrified area.
The iBeacons technology has the advantages that the transmission distance is very far and can reach 50m at most, of course, the recommended maximum distance is 10m for the transmission effect, and the data transmission speed of the iBeacons technology is very high. Most importantly, the iBeacons node equipment is small and exquisite, and can be placed in any indoor space, and the iBeacons node is powered by a button battery without wiring, so that the node is more convenient to arrange, and the cost is saved.
In this embodiment, all handheld devices equipped with bluetooth version 4.0 or above and iOS7 may be used as transmitters and receivers of iBeacons technology, such as smart phones.
The method for calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal intensity value comprises the following steps: calculating the distance d between the iBeacons node and the handheld device:
d＝10^((ABS(RSSI)-A)/(10*n))，
where RSSI represents the signal strength value, a represents the absolute value of the signal strength value at 1 meter from the mobile device, and n represents the environmental attenuation factor.
The method for calculating the position of the current user by taking the four iBeacons nodes as anchor nodes and utilizing a quadratic weighted centroid algorithm comprises the following steps:
put forward the constraint condition, set antenna A1、A2、A3、A4The distances to the origin of coordinates are d1、d2、d3、d4(ii) a User positions A to A2、A1To A3、A2To A4、A3To A4Are respectively D1、D2、D3、D4The line segments can form a plurality of triangles, and some constraint conditions can be obtained according to the principle that the sum of two sides of each triangle is larger than the sum of the third side of each triangle.
Selecting weight factors, wherein due to the introduction of an error value, a calculation result is not a determined position, but the intersection of three circles carries out first weighting on three points on the intersection, and the weight factors are respectively:
w11＝(d2+d3)/2(d1+d2+d3)，
w12＝(dl+d3)/2(d1+d2+d3)，
w13＝(d1+d2)/2(d1+d2+d3)，
carrying out dual weighted centroid positioning algorithm calculation, and calculating M by using centroid algorithm after weighting1(xg1，yg1) The estimated values of M can be obtained by the same method2(xg2，yg2)、M3(xg3，yg3)、M4(xg4，yg2) And introducing a secondary weighting factor to carry out secondary weighting, and carrying out secondary weighted centroid calculation on the four estimated points according to the proposed secondary weighting factor to finally obtain the final estimated position of the user position M.
After the position of the user is obtained, the position of the transformer substation constructor, the operation and maintenance personnel and the overhaul personnel can be known by the monitoring end in time according to the coordinate corresponding to the position displayed on the map. Furthermore, a motion track is generated according to the real-time user position and is displayed on the coordinate map, so that the position for reaching can be inquired according to the motion track.
Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. A transformer substation safety management method based on iBeacons is characterized by comprising the following steps:
a user statically scans the states of peripheral iBeacons nodes through handheld equipment and obtains the signal strength values of the peripheral iBeacons nodes;
selecting four iBeacons nodes with the maximum signal intensity value, and calculating the distances between the four iBeacons nodes and the handheld equipment respectively according to the signal intensity value;
taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm;
and carrying out coordinate division on the plane of the transformer substation into an electrified region and a non-electrified region, and sending warning information to the user when the position of the user is in the electrified region.
2. The iBeacons-based substation security management method according to claim 1, wherein the calculating the distances between the four iBeacons nodes and the handheld devices respectively according to the signal strength values comprises: calculating the distance d between the iBeacons node and the handheld device:
d＝10^((ABS(RSSI)-A)/(10*n))，
where RSSI represents the signal strength value, a represents the absolute value of the signal strength value at 1 meter from the mobile device, and n represents the environmental attenuation factor.
3. The iBeacons-based substation security management method according to claim 1, further comprising:
and generating a motion track according to the real-time user position and displaying the motion track on a coordinate map.
4. The utility model provides a transformer substation safety management system based on iBeacons which characterized in that includes:
the handheld device is used for scanning the states of the peripheral iBeacons nodes and obtaining the signal intensity values of the peripheral iBeacons nodes;
the calculation module is used for selecting the four iBeacons nodes with the maximum signal intensity value and calculating the distances between the four iBeacons nodes and the handheld device respectively according to the signal intensity value; taking the four iBeacons nodes as anchor nodes, and calculating the position of the current user by utilizing a quadratic weighted centroid algorithm;
the map module is used for carrying out coordinate division on a transformer substation plane into an electrified area and a non-electrified area;
and the alarm module is used for sending warning information to the user when the position of the user is in the electrified area.
5. The iBeacons-based substation security management system according to claim 4, wherein the calculating the distances between the four iBeacons nodes and the handheld devices respectively according to the signal strength values comprises: calculating the distance d between the iBeacons node and the handheld device:
d＝10^((ABS(RSSI)-A)/(10*n))，
where RSSI represents the signal strength value, a represents the absolute value of the signal strength value at 1 meter from the mobile device, and n represents the environmental attenuation factor.
6. The iBeacons-based substation security management system according to claim 4, wherein the map module is further configured to generate a motion trajectory according to the real-time user position and display the motion trajectory on a coordinate map.
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| EP3173807A1 (en) * | 2015-11-30 | 2017-05-31 | Semtech Corporation | System and method for robust and accurate rssi based location estimation |
| US20180324553A1 (en) * | 2017-05-08 | 2018-11-08 | Shenzhen GOODIX Technology Co., Ltd. | Ble-based positioning method and apparatus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178616A (en) * | 2013-03-26 | 2013-06-26 | 广东电网公司东莞供电局 | Wireless-positioning-technology-based transformer substation intelligent forbidden zone management method |
| EP3173807A1 (en) * | 2015-11-30 | 2017-05-31 | Semtech Corporation | System and method for robust and accurate rssi based location estimation |
| CN106211079A (en) * | 2016-09-23 | 2016-12-07 | 武汉创驰蓝天信息科技有限公司 | The indoor orientation method of RSSI based on iBeacons node range finding and system |
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Application publication date: 20200424 |