| 摘要 |
The invention relates to a method for detecting wind power plants using a radar system, wherein a. a number N of specifiable trains B x, where x=1,...,N, of K modulated transmitted pulses, each having a specifiable pulse train frequency, is emitted consecutively; b. a specifiable number of pulse train frequencies is used; c. after each emitted train, cyclically a switch to another pulse train frequency is made; d. transmitted pulses reflected by an object are received by the radar system and processed such that received pulses corresponding to the transmitted pulses are created, wherein for each transmitted pulse a number R of received pulses is received; e. the received pulses associated with the trains Bx of modulated transmitted pulses are used to determine the distance from the object by way of signal propagation time measurement, and a distance Doppler matrix having R lines and N*K columns is produced; f. in an azimuth region cyclically a number M of measurement processes is carried out in an azimuthal direction, wherein during each measurement process N trains B x of modulated transmitted pulses are emitted in the respective azimuthal direction, and for each measurement process M a distance Doppler matrix is produced, g. sampling values of Z, where Z=2...N, trains B N of modulated transmitted pulses from M measurement processes are strung together using a specifiable correction term and are processed, wherein by way of a maximum likelihood estimator a harmonic oscillation having the least square deviation from the sampling values is calculated; h. by applying the maximum likelihood estimator, a results matrix having R lines and N/Z columns is calculated from the distance Doppler matrix having R lines and N*K columns, wherein for each cell the signal strength, phase and Doppler frequency of the object is known; i. after the steps a)-h) consecutively two results matrixes El, E2 are produced, which are compared to each other, wherein a distance Doppler cell is marked as the site of a wind power plant if i. the signal strength of a distance Doppler cell in both results matrixes (E1, E2) is above a specifiable threshold value, and ii. the Doppler frequency shift in a distance Doppler cell in both results matrixes (E1, E2) is within a value range customary for a wind power plant, and iii. the difference of the Doppler frequencies in a distance Doppler cell in both results matrixes (E1, E2) is below a specifiable threshold value. |
