A method for obtaining a probe signal

Abstract

The application provides a kind of detection signal acquisition method, it is related to remote sensing detection technical field, comprising the following steps: S1: N receiving radar receives detection signal simultaneously, and records the time of receiving detection signal;S2: obtain the receiving radar that first receives detection signal as first radar;Obtain the receiving radar that is farthest from first radar as second radar;S3: first radar transmits the detection signal received;S4: other receiving radar is recorded as third radar, and third radar transmits the detection signal that first radar transmits again;S5: second radar obtains once-transmitted signal and twice-transmitted signal, and after pre-processing, the detection signal received by second radar is corrected.The application has simple structure, and can be effectively corrected and obtained by only using multiple receiving radars to cooperate, without adding new device, greatly reduces the influence of external factors, and has high detection precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of remote sensing detection, in particular, the present application relates to a kind of detection signal acquisition method. BACKGROUND

[0002] With the continuous development of space technology, the requirements of various applications such as high-resolution remote sensing and space astronomical observation on the comprehensive performance of spacecraft are also increasing, and a satellite platform with high pointing accuracy and high stability is urgently needed to meet the needs of future spacecraft development. Microsatellites have the advantages of flexibility, low cost and short cycle, so small and micro detection satellites are used more and more frequently.

[0003] Now it is very important to obtain information of a detection target, especially when the satellite sends the detection signal of the detection target back to the ground at a high altitude, it may be affected by weather and the rotation of the earth, resulting in distortion and error in the content of the detection signal received. Therefore, more and more attention is paid to the detection and acquisition of satellite signals, for example, Chinese patent document CN102213774A provides a satellite detection method and device. The method mainly includes: using a light emitting device to emit a non-visible light signal to the universe, collecting the reflected light signal of the non-visible light signal returned from the universe; filtering the reflected light signal through a filter device to filter out the background stray light of the universe contained in the reflected light signal, and obtaining the reflected light signal returned by the satellite in the universe; signal analysis and processing of the reflected light signal returned by the satellite to obtain the information of the satellite. The above-mentioned embodiment of the application uses a non-visible light signal to detect a satellite that can hide in visible light, avoids the weakness of passive detection of satellite signals, and has high resolution and ranging accuracy.

[0004] However, the above detection method still has the following shortcomings: the structure is too complex, and too many filter devices and other structures are needed to assist signal acquisition. The influence of weather and external factors on the detection signal cannot be eliminated, and the detection accuracy is not high enough.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable detection signal acquisition method. SUMMARY

[0006] The present application aims to provide a detection signal acquisition method with simple structure, which can effectively correct and acquire detection signals by using multiple receiving radars to work together without adding new devices, greatly reducing the influence of external factors, and having high detection accuracy.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] A detection signal acquisition method adopts a detection signal acquisition structure, the structure comprises N receiving radars, the N receiving radgars are respectively located on the vertex of regular N polygon, and N is not less than 4;

[0009] The method comprises the following steps:

[0010] S1: the N receiving radars simultaneously receive the detection signal, and record the time of receiving the detection signal;

[0011] S2: a receiving radar that receives the detection signal first is obtained, and is recorded as a first radar; a receiving radar farthest from the first radar is obtained, and is recorded as a second radar;

[0012] S3: the first radar forwards the received detection signal, and is recorded as a first forwarded signal;

[0013] S4: a receiving radar other than the first radar and the second radar is recorded as a third radar, and the third radar forwards the detection signal forwarded by the first radar again, and is recorded as a second forwarded signal;

[0014] S5: the second radar obtains the first forwarded signal and the second forwarded signal, and corrects the detection signal received by the second radar after preprocessing.

[0015] As a preferred embodiment of the present application, a high-precision clock is arranged in the receiving radar to record the time of receiving the detection signal, and the side length of the regular N polygon is not less than the product of the minimum reading accuracy of the high-precision clock and the speed of light.

[0016] As a preferred embodiment of the present application, if the number of N is odd, the number of the second radars is two; if the number of N is even, the number of the second radars is one.

[0017] As a preferred embodiment of the present application, if the number of N is odd, the detection signals received by the two second radars are corrected mutually when step S5 is performed.

[0018] As a preferred embodiment of the present application, when the first radar forwards the received detection signal when step S3 is performed, a first forwarding identifier is attached.

[0019] When the third radar forwards the detection signal forwarded by the first radar when step S4 is performed, a second forwarding identifier is attached.

[0020] As a preferred embodiment of the present application, when step S5 is performed, the first forwarded signal is corrected using the second forwarded signal first; and then the detection signal received by the second radar is corrected using the first forwarded signal after correction.

[0021] As a preferred embodiment of the present invention, when using a secondary forwarding signal to correct a primary forwarding signal, the specific steps are as follows: first, the secondary forwarding signal is decrypted and read, compared with the primary forwarding signal, and the matching degree is obtained as the first level of trust. After introducing the first level of trust through the secondary forwarding signal, the primary forwarding signal is corrected.

[0022] As a preferred embodiment of the present invention, when using the modified first-pass signal to correct the detection signal received by the second radar, the specific steps are as follows: the modified first-pass signal is obtained, compared with the detection signal received by the second radar to obtain the matching degree, which is used as the second confidence level. After introducing the second confidence level through the modified first-pass signal, the detection signal received by the second radar is corrected.

[0023] The beneficial effects of the detection signal acquisition method of the present invention are as follows: the structure is simple, only requiring multiple receiving radars to work together, without the need to add new devices, and the detection signal can be effectively corrected and acquired, greatly reducing the influence of external factors and achieving high detection accuracy. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating a method for acquiring detection signals according to the present invention. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement of modules and structures set forth in these embodiments does not limit the scope of the invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and systems known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and systems should be considered part of this application specification.

[0029] Example: Figure 1 The image shown is merely one embodiment of the present invention. A method for acquiring detection signals employs a detection signal acquisition structure, which includes N receiving radars, each located at a vertex of a regular N-sided polygon, where N is not less than 4.

[0030] The receiving radars are provided with high-precision clocks for recording the time of receiving the detection signal, and the length of the side of the regular N-polygon is not less than the product of the minimum reading accuracy of the high-precision clock and the speed of light.

[0031] For example, if the minimum reading accuracy of the high-precision clock is accurate to 10 to the power of 6 seconds, and the speed of light is 3 times 10 to the power of 8 meters per second, then the length of the side of the regular N-polygon is not less than 300 meters, i.e. the distance between the two adjacent receiving radars is not less than 300 meters.

[0032] To be precise, the length of the side of the regular N-polygon is preferably an integer multiple of the product of the minimum reading accuracy of the high-precision clock and the speed of light, so that the time of the retransmitted signal reaching the receiving radars will be different, facilitating the identification of the order.

[0033] In addition, the N receiving radars can work independently in a normal state, and can be coordinated when needed, without the need for any other equipment to obtain the detection signal.

[0034] The method comprises the following steps:

[0035] S1: The N receiving radars simultaneously receive the detection signal and record the time of receiving the detection signal;

[0036] Since the N receiving radars are far enough apart, the difference in receiving time of the detection signal reaching any two receiving radars can be identified and recorded by the high-precision clock.

[0037] S2: Obtain the receiving radar that first receives the detection signal, denoted as the first radar; obtain the receiving radar farthest from the first radar, denoted as the second radar;

[0038] Here, if the number N is odd, then the number of second radars is two; if the number N is even, then the number of second radars is one.

[0039] For example, if there are four receiving radars forming a square, then the receiving radars opposite the first radar are the second radars, and there is only one second radar;

[0040] If there are five receiving radars forming a regular pentagon, then the two receiving radars opposite the first radar and not adjacent to the first radar are farthest from the first radar, and there are two second radars.

[0041] S3: The first radar retransmits the received detection signal, denoted as a first retransmitted signal;

[0042] When performing step S3, the first radar retransmits the received detection signal, and attaches a first retransmission identifier.

[0043] S4: a third radar is recorded as a receiving radar except the first radar and the second radar, the third radar re-transmits the detection signal transmitted by the first radar, recorded as a secondary retransmission signal;

[0044] When step S4 is executed, the third radar re-transmits the detection signal transmitted by the first radar, and the secondary retransmission identification is attached.

[0045] S5: the second radar acquires the primary retransmission signal and the secondary retransmission signal, and corrects the detection signal received by the second radar after pre-processing.

[0046] When step S5 is executed, the primary retransmission signal is corrected using the secondary retransmission signal first, and then the detection signal received by the second radar is corrected using the corrected primary retransmission signal.

[0047] When the primary retransmission signal is corrected using the secondary retransmission signal, the secondary retransmission signal is decrypted and read first, compared with the primary retransmission signal to obtain a matching degree as a first trust degree, and the primary retransmission signal is corrected after the first trust degree is introduced through the secondary retransmission signal.

[0048] In addition, when the detection signal received by the second radar is corrected using the corrected primary retransmission signal, the corrected primary retransmission signal is acquired, compared with the detection signal received by the second radar to obtain a matching degree as a second trust degree, and the detection signal received by the second radar is corrected after the second trust degree is introduced through the corrected primary retransmission signal.

[0049] It should be noted that if the number of N is odd, the detection signals received by the two second radars are corrected with each other when step S5 is executed.

[0050] In summary, if the number of N is odd, three times of detection signal correction are required, and if the number of N is even, two times of detection signal correction are required, so that through multiple correction, the influence of external factors is effectively reduced, and the detection accuracy is improved.

[0051] The detection signal acquisition method has a simple structure, only multiple receiving radars are used for cooperation, without adding new devices, so that the detection signal can be effectively corrected and acquired, the influence of external factors is greatly reduced, and the detection accuracy is high.

[0052] The present application is not limited to the above specific embodiments, and various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical essence of the present application shall be included in the protection scope of the present application.

Claims

1. A detection signal acquisition method using a detection signal acquisition structure, the structure comprising N receiving radars, the N receiving radars being located at the vertices of a regular N-polygon, N being not less than 4; characterized in that The method comprises the following steps: S1: The N receiving radars simultaneously receive detection signals and record the time of receiving the detection signals; S2: Obtain the receiving radar that first receives the detection signal, and mark it as the first radar; obtain the receiving radar that is farthest from the first radar, and mark it as the second radar; S3: The first radar forwards the received detection signal, and mark it as the first forwarded signal; S4: Mark the receiving radars other than the first radar and the second radar as the third radars, and the third radars forward the detection signal forwarded by the first radar again, and mark it as the second forwarded signal; S5: The second radar obtains the first forwarded signal and the second forwarded signal, and corrects the detection signal received by the second radar after preprocessing; When step S5 is performed, the first forwarded signal is corrected using the second forwarded signal first, and then the detection signal received by the second radar is corrected using the first forwarded signal after correction; When the first forwarded signal is corrected using the second forwarded signal, the second forwarded signal is first decrypted and read, compared with the first forwarded signal to obtain a matching degree as a first trust degree, and the first forwarded signal is corrected after the first trust degree is introduced through the second forwarded signal; When the detection signal received by the second radar is corrected using the first forwarded signal after correction, the first forwarded signal after correction is obtained, compared with the detection signal received by the second radar to obtain a matching degree as a second trust degree, and the detection signal received by the second radar is corrected after the second trust degree is introduced through the first forwarded signal after correction.

2. The method of claim 1, wherein: A high-precision clock is arranged in the receiving radar to record the time of receiving the detection signal, and the side length of the regular N-polygon is not less than the product of the minimum reading accuracy of the high-precision clock and the speed of light.

3. The method of claim 1, wherein: If the number of N is odd, the number of the second radars is two; if the number of N is even, the number of the second radars is one.

4. The method of claim 3, wherein: If the number of N is odd, when step S5 is performed, the detection signals received by the two second radars are corrected with each other.

5. The method of claim 1, wherein: When step S3 is performed, the first radar forwards the received detection signal, and attaches a first forwarding identifier; When step S4 is performed, the third radar forwards the detection signal forwarded by the first radar again, and attaches a second forwarding identifier.

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