Power transmission line swing locus measuring system and measuring method based on direct displacement amount

Technical Field

The invention relates to the power transmission line detection field, in particular to a swing of the transmission line based on direct displacement system and method for measuring the track.

Background Art

Transmission line galloping refers to the outside under the action of the non-balanced stress, low frequency transmission lines, the vibration phenomenon greatly. When the outdoor transmission line generating dancing, often caused damage to hardware on the transmission tower, the transmission line the flashover and other accidents, serious waving of the power transmission line will cause large-scale accident such as the collapse of the transmission tower. Therefore, effect of the power transmission line monitoring has important utility value and economic significance.

Currently, transmission line monitoring of the system and by the acceleration sensor of the camera with digital Image processing system. Acceleration sensor system the acceleration sensor is attached to the surface of the transmission line, when the transmission line is occurred, the acceleration information of the acceleration sensor is sent to the computer system through the Ethernet, computer to the acceleration information obtained by integrating information galloping of the power transmission line, this kind of method in the integrating process of the larger interference of the initial value, and the acceleration sensor is easy to be affected by interference of the power transmission line, poor accuracy. Camera and the digital Image processing system of the camera is mounted on a power transmission line tower, the obtained photographs galloping of the transmission line through the wireless transmission system and transmitted to the computer using a digital Image processing system for processing, so as to obtain the wave the trajectory of the power transmission line. This kind of method can be realized only qualitative monitoring and lower accuracy.

In order to be able to accurately grasp line wave the trajectory information, there is an urgent need of using direct displacement means circuit galloping track measuring system.

Content of the invention

The purpose of this invention is to provide a swinging of the transmission line based on direct displacement system and method for measuring the track, can be through direct displacement measuring achieve high sensitivity of the outdoor transmission line galloping trajectory measurement, has advantage of measuring the high precision, at the same time can also ensure the continuity of the trajectory measurement transmission line galloping with integrity.

The invention adopts the following technical scheme:

A swing of the transmission line based on direct displacement of the trajectory measurement system, characterized in that comprises a displacement sensing system, signal conditioning conversion system, data acquisition and conversion system, data transmission system and monitoring analysis system;

The displacement sensing system includes two sides of the transmission line are respectively arranged in the two groups of rope sensor, the rope sensor 1st and 2nd rope sensor, two groups of the cord rope sensor is fixed in the same position of the power transmission line; two groups of the pull rope the signal of the sensor output terminals are respectively connected with the signal conditioning conversion system;

The signal conditioning conversion system is used for the two groups of the pull rope the sensor output current signal conditioning and conversion into a voltage signal, signal conditioning system for converting data acquisition is connected with the signal output of the signal input end of the conversion system;

The data acquisition and conversion system is used for the voltage of the received signals are amplified, and converts an input analog signal to a digital signal for output, data acquisition and conversion system is connected with the signal output of the signal input end of the data transmission system;

The data transmission system is used for the data acquisition conversion system output signal is transmitted to the monitoring and analysis system;

The system for monitoring and analyzing of the received signal for processing, the transmission line is converted into a pull-rope length of rope sensor, and according to the pull-rope length of rope sensor rope sensor and 1st and 2nd rope sensor to calculate the horizontal distance between coordinate galloping of the power transmission line, the plurality of groups are obtained through the calculation of the power transmission line of the galloping coordinate drawing display transmission line the galloping of the track.

Rope sensor the two sets of the power transmission line in the direction perpendicular to the installation within a same plane.

Rope sensor the two sets of two groups of the rope perpendicular to the rope sensor of the power transmission line is located within a same plane.

Also includes isolation protection system, isolation protection system is used for realizing the electrical isolation, isolating protection system is connected with the signal conditioning the signal input end of the signal output end of the conversion system, isolation protection system data acquisition is connected with the signal output of the signal input end of the conversion system.

The monitoring analysis system according to the power transmission line is in pull-rope length of rope sensor 1st, pull-rope length of rope sensor 2nd and 1st the rope sensor the distance between the rope sensor 2nd, 1st using helenae theorem try to pull the rope of the sensor, by the pull rope and rope sensor 2nd 1st 2nd rope sensor and rope sensor connecting line between the area of the triangle formed by the, then the time to coordinate the galloping of the of the transmission line, wherein the right-angle coordinate system of the original point is located in the rope sensor 1st 2nd horizontal position the mid-point of the rope sensor; monitoring analysis system different points through the calculated coordinates of the galloping of the of the transmission line, according to the obtained ultimately a plurality of different sets of point coordinates galloping of the transmission line of the galloping of the drawing display transmission line track.

The sensor is mounted on the fixed pillar, the rope pull rope of the sensor.

A swing of the transmission line based on direct displacement measuring method of trajectory measurement system according to Claim 1, comprising the following steps:

A: use in the transmission line are respectively arranged on two sides of the rope sensor of two set of real-time acquisition of transmission line galloping signal;

B: when the monitoring and analysis system after receiving a start of the measurement signal, timer starts timing, at the same time data acquisition and conversion system is used to collect two sets of pull rope sensor sends signal swing of the transmission line, and the collected signal is transmitted to the monitoring and analysis system;

C: monitoring analysis system will be received into the signal transmission line galloping of the moment of pull-rope length of rope sensor 1st and 2nd pull rope pull-rope length of the sensor, and in accordance with the rope sensor 1st the distance between the rope sensor 2nd, 1st using helenae theorem try to pull the rope of the sensor, by the pull rope and rope sensor 2nd 1st 2nd rope sensor and rope sensor connecting line between the area of the triangle formed by the, then the time to coordinate the galloping of the of the transmission line, wherein the right-angle coordinate system of the original point is located in the rope sensor 1st 2nd the mid-point of the rope sensor horizontal position;

D: monitoring analysis system uses to judge whether the timing function of the timer reaches the set time, the set time is reached if not return to step C continue to calculate a next moment of swing of the transmission line of the coordinate; if it reaches the set time then enter the step E;

E: monitoring analysis system to the calculated set of each moment in time when the power transmission line of the coordinate of the galloping of the fitting, the set time of the transmission line of the wave the trajectory Image, and storage;

F: monitoring analysis system will the timer and a data acquisition and conversion system in the zero of the buffer data initialization, wait for the next command.

Rope sensor the two sets of the power transmission line in the direction perpendicular to the installation within a same plane.

Rope sensor the two sets of two groups of the rope perpendicular to the rope sensor of the power transmission line is located within a same plane.

The invention relative to the existing acceleration sensor detection method and the camera with digital Image processing system detecting method, has the following advantages:

1. According to the traditional acceleration sensor system the acceleration of the acceleration sensor obtained galloping track information analysis of the power transmission line, to integrating the acceleration, and the integrating of the initial state in the process the diophantine the greater error is caused. According to this invention by analysis of direct displacement, of the power transmission line using the pull rope sensor to analyze galloping track, displacement information obtained directly, avoiding complex integral operation, thereby reducing the measurement error, so that the measuring result is more accurate.

2. The traditional use of a camera with digital Image processing system can only effect of the qualitative analysis of the power transmission line, in other words can only judge whether the transmission line is galloping, and acceleration sensor system when torsion occurs in the transmission line will produce a large output error. The invention utilizes the pull rope sensor to analyze galloping track power transmission line, the transmission line can be effectively avoided and swinging the error caused by the impact. At the same time, compared with the acceleration sensor attached to the surface of the transmission line, this invention adopts the rope sensor in a certain distance apart from the transmission, can better avoid transmission line of the power generated in the process of the electromagnetic interference.

3. The present invention can effectively in adverse weather conditions, rain and snow, as well as the trajectory measurement swing of the power transmission line, also when working in night will not be affected, thereby ensuring that the transmission line galloping track measuring the continuity and integrity.

Description of drawings

Figure 1 is the principle diagram of the invention the transmission line galloping track measuring system;

Figure 2 to the invention the transmission line galloping track rope sensor in the measuring system installation and measurement principle diagram;

Figure 3 is flowchart of the invention the throw trajectory measurement system based on transmission line measuring method.

Mode of execution

The following binding the Figures and in the embodiment of the invention to the detailed description:

As shown in fig. 1 to fig. 3 is shown, the present invention directly on the basis of the effect of the displacement of the trajectory measurement system, comprises a displacement sensing system, signal conditioning conversion system, data acquisition and conversion system, data transmission system and monitoring analysis system;

Wherein displacement sensing system includes are respectively arranged in the transmission line 5 of the two sides of the two groups of rope sensor, the rope sensor 1st 1 and rope sensor 2nd 2, two groups of the cord rope sensor 3 is fixed on the transmission line 5 in the same position of the; two groups of the pull rope the signal of the sensor output terminals are respectively connected with the signal conditioning conversion system; two groups of rope sensor adopts the current pull-rope sensor, of the cord rope sensor 3 using the insulating rope. Rope sensor is mounted in the fixed pillar 4, the height of the fixed pillar is lower than the transmission line 5 is in the lowest point of the wave. In order to guarantee the measurement power transmission line 5 dancing the accuracy of the coordinates, in the invention, two groups of the pull rope the sensor is arranged in the direction perpendicular to the transmission line 5 in the same plane, two groups of the cord rope sensor 3 with the two sets of pull rope sensor is located in perpendicular to the transmission line 5 in the same plane. When the transmission line 5 in the external non-equilibrium stress under the influence of the bouncing phenomenon, transmission line 5 dancing on the sensor drives the pull rope of the rope 3 and transmission line 5 a to move together; when the pull rope is 3 changes the length of the, rope sensor 1st 1 and 2nd rope sensor 2 the output of the signal output end of the current signal, the magnitude of the current signal and the pull rope 3 is directly proportional to the length of the.

In this embodiment, the displacement of the rope sensor measurement range is 0-500cm, two pull rope sensors respectively arranged at the height of 600 cm on the fixed pillar 4, the lowest point is lower than the line wave. Two fixed columns are located on the power transmission line 5 two side, two fixed pillar and line the horizontal distance thereof is 20 cm.

Signal conditioning conversion system is used for the two groups of the pull rope the sensor output current signal conditioning and conversion into a voltage signal, signal conditioning system for converting data acquisition is connected with the signal output of the signal input end of the conversion system; signal conditioning conversion system can be rope sensor 1st 1 and 2nd rope sensor 2 output 4-20mA current signal conditioning and conversion, its conversion into 1-5V voltage signal. The embodiment of the invention, signal conditioning conversion system can adopt the signal conditioning converter.

Data acquisition and conversion system is used for the voltage of the received signals are amplified, and converts an input analog signal to a digital signal for output, data acquisition and conversion system is connected with the signal output of the signal input end of the data transmission system; in this embodiment, data acquisition and conversion system uses 16-bit data acquisition card, can be the input voltage signal is subjected to amplification processing, and the voltage analog signal into a digital signal is transmitted to the data transmission system.

In order to further improve the signal quality, in this invention, also in the signal conditioning conversion system and data acquisition and conversion system isolation protection system is arranged between the, isolation protection system is used for realizing the electrical isolation, isolating protection system is connected with the signal conditioning the signal input end of the signal output end of the conversion system, isolation protection system data acquisition is connected with the signal output of the signal input end of the conversion system.

Data transmission system is used for the data acquisition conversion system output signal is transmitted to the monitoring and analysis system; in this embodiment, data transmission system can be made of optical fiber network system.

Monitoring analysis system is used for processing the received signal, are respectively converted to a transmission line 5 the rope sensor 1st 1 of the cord 3 length l_a and rope sensor 2nd 2 pull rope 3 length l_b, according to 1st and rope sensor 1 with rope sensor 2nd 2 the distance between l_c computing electric power line 5 the galloping of the coordinate, are obtained through the calculation ultimately a plurality of groups of transmission line 5 of the galloping coordinate drawing display transmission line 5 the galloping of the track.

Monitoring analysis system according to the generating power transmission line 5 the rope sensor 1st 1 pull-rope length of l_a, rope sensor 2nd 2 pull-rope length of l_b and rope sensor 1st 1 with rope sensor 2nd 2 the distance between l_c, because of the above-mentioned three connecting line to form a triangle, can be drawn using helenae theorem S the area of the triangle, then the transmission of the moment to 5 the galloping of the coordinate, wherein the right-angle coordinate system of the original point is located in the rope sensor 1st 1 with rope sensor 2nd 2 the mid-point of the horizontal position; monitoring analysis system is obtained through the calculation of the different points in the power transmission line of 5 the galloping of the coordinate, according to the obtained final time point of the transmission line of the plurality of different 5 dance coordinate drawing display transmission line of 5 the galloping of the track.

In this embodiment, in order to calculate the rope sensor 1st 1 of the cord 3 for example the horizontal plane by an angle, known rope sensor 1st 1 of the cord 3 length l_a, rope sensor 2nd 2 pull rope 3 length l_b and rope sensor 1st 1 with rope sensor 2nd 2 the distance between l_c, because of the above-mentioned three connecting line to form a triangle, according to helenae theorem can be obtained the area of the triangle S:

S=p(p-la)(p-lb)(p-lc),p=la+lb+lc2

Then the transmission line can be obtained at the time of the 5 the galloping of the coordinate (X, Y);

Y=2SlcX=la2-Y2-lc2;

Wherein the right-angled coordinate system of the original points are located on rope sensor 1st 1 with rope sensor 2nd 2 the mid-point of the horizontal position.

The present invention directly on the basis of the effect of the displacement of the measuring method of trajectory measurement system, characterized in that comprises the following steps:

A: are respectively provided in the transmission line by 5 two groups on both sides of the transmission of real-time acquisition of rope sensor 5 dancing signal;

B: when the monitoring and analysis system after receiving a start of the measurement signal, timer starts timing, at the same time data acquisition and conversion system is used to collect two groups of transmission line sensor sends pull rope 5 dancing signal, and the collected signal is transmitted to the monitoring and analysis system;

C: monitoring analysis system will receive the transmission line 5 dancing signal into the rope sensor 1st 1 and pull-rope length of rope sensor 2nd 2 pull-rope length of, and according to the rope sensor 1st 1 with rope sensor 2nd 2 transmission line calculating the distance between 5 the galloping of the coordinate;

D: monitoring analysis system uses to judge whether the timing function of the timer reaches the set time, the set time is reached if not return to step C to continue calculating the power transmission line at 5 the galloping of the coordinate; if it reaches the set time then enter the step E;

E: monitoring analysis system to calculate the setting time of the each moment of the transmission line in the 5 coordinate of the galloping of the fitting, the set of the transmission line within the time 5 the galloping of the track Image, and storage;

F: monitoring analysis system will the timer and a data acquisition and conversion system in the zero of the buffer data initialization, wait for the next command.

Wherein the two groups of rope sensor is perpendicular to the transmission line 5 in the same plane, two groups of the cord rope sensor 3 with the two sets of pull rope sensor is located in perpendicular to the transmission line 5 in the same plane.