CN106299696A - A kind of method utilizing received signal level to realize automatically controlling tracking antenna - Google Patents

Abstract

The invention provides a method for automatically controlling the tracking antenna by using the received signal level, the method comprising: step 1) collecting the received signal level data of the tracking antenna; step 2) sampling the received signal level data, according to The sampled value is used to determine the azimuth, and the azimuth is rotated to drive the motor to track the antenna for running search. If the received signal strength reaches the set range, the search is completed; Step 3); step 3) judge the azimuth according to the sampling value, turn the pitch to the motor to drive the tracking antenna to search until the received signal strength reaches the set range, and the pitch angle search is completed, then go to step 2) until the antenna tracking process Finish. The invention has the advantage that when the tracking antenna cannot receive the positioning information of the moving target, the moving target can be searched and tracked according to the received signal level.

Description

A Method of Automatically Controlling and Tracking Antenna Using the Received Signal Level

technical field

The invention relates to an antenna automatic tracking technology, in particular to a method for automatically controlling and tracking an antenna by using the received signal level.

Background technique

For the current real-time transmission system of observation data on high-speed flight platforms to the ground, breakthroughs need to be made in a series of key technical issues, and real-time automatic tracking of moving targets by ground receiving antennas is one of the key technologies. Due to the limitations of volume, weight and power consumption, it is impossible to use large-diameter high-gain directional antennas for small flying platforms, and omnidirectional antennas are generally used. In order to ensure the establishment of the data communication link, the ground receiving system must adopt a high-gain directional antenna. The disturbance, motion trajectory and distance of the flying platform all affect the real-time tracking of the ground receiving antenna, and the gain reduction caused by the antenna tracking pointing deviation should be controlled within a minimum range.

Whether the ground receiving antenna can automatically track moving targets will directly affect the communication quality of the entire communication link and the accuracy of sending and receiving data. Therefore, the antenna automatic tracking control technology is one of the important links in the whole "machine-ground" communication link.

At present, there are two types of ground receiving antennas that can automatically track moving targets: one is that the ground receiving antenna tracks fixed-point targets (such as geosynchronous satellites, etc.) Angle automatically tracks moving targets. The commonly used method for the latter type is: receive the positioning information of the current moving target and the receiving antenna (acquired by GPS, Beidou and other navigation receivers), calculate the angle at which the antenna azimuth and pitch angle should be pointed by the formula, and then control The motor turns the antenna into place.

In the above calculation method, the positioning information of both the ground receiving antenna and the moving target needs to be accurate, but in the actual space-ground communication process, when the locator carried on the moving target fails, or the wireless communication link is not smooth, the antenna cannot continue When the positioning information of the moving target is received, the above method cannot be implemented due to the lack of data sources, resulting in the antenna not being able to effectively track the moving target, seriously affecting the quality of communication and the accuracy of sending and receiving data.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects existing in the current method for automatically tracking moving targets, and proposes a method for automatically controlling the tracking antenna by using the received signal level. The method obtains the strength of the received signal of the antenna and generates a received signal Level (AGC) data, turn the motor to drive the antenna to run, search for the position with the strongest received signal, and then point the antenna to this position.

In order to achieve the above object, the present invention provides a method for automatically controlling the tracking antenna by using the received signal level, the method comprising:

Step 1) collecting the received signal level data of the tracking antenna;

Step 2) Sampling the received signal level data, judging the azimuth according to the sampled value, and turning the azimuth to the motor-driven tracking antenna for running search. If the received signal strength reaches the set range, the search is completed; otherwise, the azimuth angle After the search is completed, point the antenna azimuth to the starting position of the tracking, and enter step 3);

Step 3) Judging the azimuth according to the sampling value, turning the pitch to the motor to drive the tracking antenna to search until the received signal strength reaches the set range, after the pitch angle search is completed, go to step 2) until the antenna tracking process ends.

In the above technical solution, said step 2) specifically includes:

Step 201) Set the azimuth direction memory maximum value of the received signal level to be a; and point the antenna to this position; set the azimuth to the direction of the motor turntable to adjust the number of times to be S, and the initial value S=0; set the azimuth to the motor turntable to adjust the direction mark It is a hexadecimal number D, the initial value D=0x55;

Among them, D=0x55 means that the azimuth motor is searching in the clockwise direction; D=0xAA means that the azimuth motor is searching in the counterclockwise direction;

Step 202) sampling the received signal level data, the sampling value is b, and judging whether a≤b is established, if the judging result is affirmative, enter step 203), otherwise, proceed to step 204);

Step 203) make a=b; n=0, N=0, S=0, go to step 202);

Step 204) _judging whether | _ab | =0, S=0, proceed to step 202);

Step 205) judging whether n>5 is established, if the judgment result is affirmative, proceed to step 206), otherwise, proceed to step 202);

Step 206) make n=0, N=N+1;

Step 207) judging whether N>3 is established, if the judgment result is affirmative, proceed to step 209), otherwise, proceed to step 208);

Step 208) judging whether D=0x55 is established, if the judgment result is affirmative, the driving azimuth direction motor rotates an azimuth step angle in the clockwise direction, and returns to step 202); otherwise, the driving azimuth direction motor rotates an azimuth in the counterclockwise direction step angle; return to step 202);

Step 209) Negate the azimuth to the motor turntable adjustment direction mark D, and drive the azimuth to the motor to rotate three azimuth step angles along the direction corresponding to D, that is, the antenna azimuth points back to the tracking start position;

Step 210) Let N=0, S=S+1;

Step 211) judging whether S=2 is established, if the judgment result is negative, proceed to step 202); otherwise, make S=0, proceed to step 212);

S=2 means that the azimuth motor has searched in both clockwise and counterclockwise directions;

Step 212) After the azimuth search is completed, go to step 3).

In the above technical solution, said step 3) specifically includes:

Step 301) Set the number of adjustments in the direction of the pitching motor turntable as T=0; set the pitching adjustment mark to the motor turntable as a hexadecimal number M, and the initial value M=0x55;

Among them, M=0x55 means that the pitch motor searches in a clockwise direction; M=0xAA means that the pitch motor searches in a counterclockwise direction;

Step 302) sampling the received signal level data, the sampling value is b, and judging whether a≤b is established, if the judging result is affirmative, enter step 303), otherwise, proceed to step 304);

Step 303) make a=b; n=0, N=0, T=0, go to step 302);

Step 304) judging whether |ab| _≥Δ2 is established, where _Δ2 is the pitch sensitivity value; if the judgment result is affirmative, make n=n+1, and turn to step 305); otherwise, make n=0, N =0, T=0, proceed to step 302);

Step 305) judging whether n>5 is established, if the judgment result is affirmative, proceed to step 306), otherwise, proceed to step 302);

Step 306) make n=0, N=N+1;

Step 307) judging whether N>3 is established, if the judgment result is affirmative, proceed to step 309), otherwise, proceed to step 308);

Step 308) Judging whether M=0x55 is established, if the judgment result is affirmative, drive the pitching motor to rotate a pitching step angle clockwise, and return to step 302); otherwise, drive the pitching motor to rotate a pitching counterclockwise step angle; return to step 302);

Step 309) Invert the pitching motor turntable adjustment direction mark M, and drive the pitching motor to rotate three pitching step angles along the direction corresponding to M, that is, the antenna azimuth points back to the tracking starting position;

Step 310) Let N=0, T=T+1;

Step 311) judging whether T=2 is established, if the judgment result is negative, proceed to step 302); otherwise, make T=0, proceed to step 312);

T=2 means that the pitch motor has searched both up and down;

Step 312) After the pitch angle is searched, go to step 202) until the end of the antenna tracking.

The invention has the advantages that when the tracking antenna cannot receive the positioning information of the moving target, the moving target can be searched and tracked according to the AGC value, thereby realizing the function of automatically controlling the tracking antenna and expanding the application range of the control method.

Description of drawings

Fig. 1 is a flow chart of azimuth angle search in the method of realizing automatic control and tracking antenna by using received signal level according to the present invention.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

A method for automatically controlling the tracking antenna by using the received signal level, said method comprising the steps of:

Step 1) collecting the received signal level data of the tracking antenna;

Step 2) Sampling the received signal level data, judging the azimuth according to the sampled value, and turning the azimuth to the motor-driven tracking antenna for running search. If the received signal strength reaches the set range, the search is completed; otherwise, the azimuth angle After the search is completed, point the antenna azimuth to the starting position of the tracking, and enter step 3);

As shown in Figure 1, the step 2) specifically includes:

Step 201) Set the azimuth direction memory maximum value of the received signal level to be a; and point the antenna to this position; set the azimuth to the direction of the motor turntable to adjust the number of times to be S, and the initial value S=0; set the azimuth to the motor turntable to adjust the direction mark Hexadecimal number D, initial value D=0x55;

Among them, D=0x55 means that the azimuth motor is searching in the clockwise direction; D=0xAA means that the azimuth motor is searching in the counterclockwise direction; S=2 means that the azimuth motor has searched in both clockwise and counterclockwise directions search;

Step 202) sampling the received signal level data, the sampling value is b, and judging whether a≤b is established, if the judging result is affirmative, enter step 203), otherwise, proceed to step 204);

Step 203) make a=b; n=0, N=0, S=0, go to step 202);

Step 204) _judging whether | _ab | =0, S=0, proceed to step 202);

Step 205) judging whether n>5 is established, if the judgment result is affirmative, proceed to step 206), otherwise, proceed to step 202);

Step 206) make n=0, N=N+1;

Step 207) judging whether N>3 is established, if the judgment result is affirmative, proceed to step 209), otherwise, proceed to step 208);

Step 208) judging whether D=0x55 is established, if the judgment result is affirmative, the driving azimuth direction motor rotates an azimuth step angle in the clockwise direction, and returns to step 202); otherwise, the driving azimuth direction motor rotates an azimuth in the counterclockwise direction step angle; return to step 202);

Step 209) Invert the azimuth motor turntable adjustment direction mark D, and drive the azimuth motor to rotate three azimuth step angles along the direction corresponding to D, that is, the antenna azimuth points back to the tracking start position;

Step 210) Let N=0, S=S+1;

Step 211) judging whether S=2 is established, if the judgment result is negative, proceed to step 202); otherwise, make S=0, proceed to step 212);

If S=2, it means that the received signal level does not meet the requirements when the antenna is searching in the reverse direction. At this time, the antenna is driven in the reverse direction of this adjustment to drive the azimuth motor to rotate three azimuth step angles, that is, the antenna azimuth pointing Back to the tracking starting position, the antenna pitch angle needs to be adjusted.

Step 212) azimuth angle search is completed, enter step 3);

Step 3) Carry out azimuth judgment according to the sampling value, turn the pitch to the motor to drive the tracking antenna to search until the received signal strength reaches the set range, and the pitch angle search is completed, then go to step 2) until the antenna tracking process ends; specifically include :

Step 301) Set the number of adjustments in the direction of the pitching motor turntable as T=0; set the pitching adjustment mark to the motor turntable as a hexadecimal number M, and the initial value M=0x55;

Among them, M=0x55 means that the pitch motor searches in the clockwise direction (corresponding to the upward direction of the antenna turntable); M=0xAA means that the pitch motor searches in the counterclockwise direction (corresponding to the downward direction of the antenna turntable); T=2 means that the pitch motor searches Searches have been carried out in both directions up and down;

Step 302) sampling the received signal level data, the sampling value is b, and judging whether a≤b is established, if the judging result is affirmative, enter step 303), otherwise, proceed to step 304);

Step 303) make a=b; n=0, N=0, T=0, go to step 302);

Step 304) judging whether |ab| _≥Δ2 is established, where _Δ2 is the pitch sensitivity value; if the judgment result is affirmative, make n=n+1, and turn to step 305); otherwise, make n=0, N =0, T=0, proceed to step 302);

Step 305) judging whether n>5 is established, if the judgment result is affirmative, proceed to step 306), otherwise, proceed to step 302);

Step 306) make n=0, N=N+1;

Step 307) judging whether N>3 is established, if the judgment result is affirmative, proceed to step 309), otherwise, proceed to step 308);

Step 308) Judging whether M=0x55 is established, if the judgment result is affirmative, drive the pitching motor to rotate a pitching step angle in the clockwise direction (upward corresponding to the antenna turntable), and return to step 302); otherwise, drive the pitching motor along the Rotate a pitch step angle in the counterclockwise direction (corresponding to the downward direction of the antenna turntable; return to step 302);

Step 309) Invert the pitching motor turntable adjustment direction mark M, and drive the pitching motor to rotate three pitching step angles along the direction corresponding to M, that is, the antenna azimuth points back to the tracking starting position;

Step 310) Let N=0, T=T+1;

Step 311) judging whether T=2 is established, if the judgment result is negative, proceed to step 302); otherwise, make T=0, proceed to step 312);

Step 312) After the pitch angle is searched, go to step 202) until the end of the antenna tracking.

In practical applications, an AGC value that can ensure the normal operation of the communication link can also be set in advance to replace the AGC maximum value a obtained by searching. Hidden dangers that cause the system to fail to work.

The antenna tracking precision of the method of the invention is determined by the AGC error threshold value and the motor operation step size. By setting the AGC error threshold and output frequency, the tracking accuracy and rate of the antenna can be controlled. The smaller the AGC error threshold is set, the higher the tracking accuracy of the antenna, but the more frequent the antenna shakes at the same time. The higher the AGC output frequency, the stronger the real-time performance of antenna tracking.

Claims (3)

1. utilizing received signal level to realize automatically controlling the method following the tracks of antenna, described method includes walking as follows Rapid:

Step 1) gather the received signal level data following the tracks of antenna；

Step 2) docking receive signal level data sample, carry out orientation judgement according to sampled value, rotational orientation to Motor drives tracking antenna to carry out operating search, if received signal strength reaches the scope set, then this time searches for Complete；Otherwise, azimuth search is complete, and antenna bearingt is pointed to tracking initiation position, enters step 3)；

Step 3) carry out orientation judgement according to sampled value, rotate pitching and drive tracking antenna to carry out operating search to motor, Until received signal strength reaches the scope set, angle of pitch search is complete, proceeds to step 2), until antenna tracking Process terminates.

The method utilizing received signal level realization to automatically control tracking antenna the most according to claim 1, its It is characterised by, described step 2) specifically include:

Step 201) to arrange the orientation of received signal level to memory maximum be a；And antenna is pointed to this position； Arranging orientation to motor turntable direction regulation number of times is S, initial value S=0；Orientation is set to motor turntable regulation side To being designated hexadecimal number D, initial value D=0x55；

Wherein, D=0x55 represents that orientation scans in the clockwise direction to motor；D=0xAA represent orientation to Motor scans in the counterclockwise direction；

Step 202) docking receive signal level data sample, sampled value is b, it is judged that whether a≤b sets up, as Really judged result is affirmative, enters step 203), otherwise, proceed to step 204)；

Step 203) make a=b；N=0, N=0, S=0, proceed to step 202)；

Step 204) judge | a-b | >=Δ₁Whether set up, wherein Δ₁For orientation to Sensitirity va1ue；If it is determined that knot Fruit is affirmative, makes n=n+1, proceeds to step 205)；Otherwise, make n=0, N=0, S=0, proceed to Step 202)；

Step 205) judge n > 5 whether set up, if a determination be made that certainly, proceed to step 206), otherwise, Proceed to step 202)；

Step 206) make n=0, N=N+1；

Step 207) judge N > 3 whether set up, if a determination be made that certainly, proceed to step 209), otherwise, Proceed to step 208)；

Step 208) judge whether D=0x55 sets up, if a determination be made that certainly, drive orientation to motor It is rotated in a clockwise direction an orientation step angle, returns step 202)；Otherwise, drive orientation to motor along the inverse time Pin direction rotates an orientation step angle；Return step 202)；

Step 209) orientation is negated to motor turntable regulation direction signs D, and drive orientation corresponding along D to motor Direction rotate three orientation step angles, i.e. antenna bearingt is pointed to and is returned to tracking initiation position；

Step 210) make N=0, S=S+1；

Step 211) judge whether S=2 sets up, if a determination be made that negative, proceed to step 202)；Otherwise, Make S=0, proceed to step 212)；

S=2 represents that orientation all carried out search to motor in both direction clockwise and anticlockwise；

Step 212) azimuth search complete, enter step 3).

The method utilizing received signal level realization to automatically control tracking antenna the most according to claim 2, its It is characterised by, described step 3) specifically include:

Step 301) arrange pitching to motor turntable direction regulation number of times be T=0；Arrange pitching to adjust to motor turntable Joint is designated hexadecimal number M, initial value M=0x55；

Wherein, M=0x55 represents that pitching scans in the clockwise direction to motor；M=0xAA represents pitching Scan in the counterclockwise direction to motor；

Step 302) docking receive signal level data sample, sampled value is b, it is judged that whether a≤b sets up, as Really judged result is affirmative, enters step 303), otherwise, proceed to step 304)；

Step 303) make a=b；N=0, N=0, T=0, proceed to step 302)；

Step 304) judge | a-b | >=Δ₂Whether set up, wherein Δ₂For pitching to Sensitirity va1ue；If it is determined that knot Fruit is affirmative, makes n=n+1, proceeds to step 305)；Otherwise, make n=0, N=0, T=0, proceed to Step 302)；

Step 305) judge n > 5 whether set up, if a determination be made that certainly, proceed to step 306), otherwise, Proceed to step 302)；

Step 306) make n=0, N=N+1；

Step 307) judge N > 3 whether set up, if a determination be made that certainly, proceed to step 309), otherwise, Proceed to step 308)；

Step 308) judge whether M=0x55 sets up, if a determination be made that certainly, drive pitching to motor It is rotated in a clockwise direction a pitching step angle, returns step 302)；Otherwise, drive pitching to motor along the inverse time Pin direction rotates a pitching step angle；Return step 302)；

Step 309) pitching is negated to motor turntable regulation direction signs M, and drive pitching corresponding along M to motor Direction rotate three pitching step angles, i.e. antenna bearingt is pointed to and is returned to tracking initiation position；

Step 310) make N=0, T=T+1；

Step 311) judge whether T=2 sets up, if a determination be made that negative, proceed to step 302)；Otherwise, Make T=0, proceed to step 312)；

T=2 represents that pitching all carried out search to motor in upper and lower both direction；

Step 312) angle of pitch search complete, proceed to step 202), until antenna tracking terminates.