Intensity cursor for radar
阅读：152发布：2022-07-01
专利汇可以提供Intensity cursor for radar专利检索，专利查询，专利分析的服务。并且A radar, such as a track-while-scan radar, which is provided with early and late tracking gates interconnected with cursors, blanks out the electronic cursors presentation within the gate region of the display and, instead, modulates the intensity of targets within the tracking gates so that the more closely the cursors are positioned on the center of the target, the higher the intensity of the video in the vicinity of the cursors.，下面是Intensity cursor for radar专利的具体信息内容。
1. An electronic radar display cursor apparatus comprising: a video mixer; a source of radar video signals applied to said video mixer; a source of display cursor signals; a first gate responsive to said source of display cursor signals for selectively applying said signals to said video mixer; first means presenting signals identifying an automatic tracking gate related to the intersection of the pair of cursors represented by said cursor signals; a second video gate responsive to said source of radar video signals and to said automatic tracking gate signals and selectively operable by said tracking gate signals to pass said radar video signals; control means connected for response to said source of radar video signals and to said second video gate for comparing the magnitude of signals within the region of said tracking gate with the average magnitude of signals representing said radar video, and responsive to said gated video being in excess of said average radar video by a given amount and to the presence of said tracking gate signals to selectively block said first video gate, thereby blanking out said display cursor signals in the region of said tracking gate.
2. An electronic radar display cursor apparatus according to claim 1 further comprising: a third video gate connected to said video mixer; a source of a preselected voltage representing a desired maximum display intensity; difference means responsive to said source and to said second video gate for providing a level signal, representing the difference between said gated video and said preselected voltage, to said third video gate; said third video gate selectively operable in response to said control means to provide said level signal to said video mixer, thereby to intensify the brightness of radar video within said gate concUrrently with the blanking of said cursor signals.
3. An electronic radar display cursor according to claim 1, further comprising: a third video gate; means responsive to said source of radar video signals and to said source of tracking gate signals to provide signals representative of normalized video intensity within the region of said video gates; summation means providing the sum of said normalized video intensity signals; a source of a preselected voltage representing a desired maximum display intensity; difference means responsive to said preselected voltage source and to said summation means for providing to said third video gate a level signal representing the difference between said sum signal and said preselected voltage, said third video gate selectively operable in response to said control means to provide said level signal to said video mixer, thereby to intensify the brightness of radar video within said gate as a function of the accuracy of adjusting the cursors over a target within said gate, concurrently with the blanking of said cursor signals.
4. An electronic radar display cursor apparatus according to claim 1 wherein said control means comprises: an integrator responsive to said radar video signals; a first amplifier, having a first scale factor adjustment, responsive to said integrator; a second amplifier responsive to said second video gate and having a second scale factor; a comparator responsive to the output of said first and second amplifiers; an AND circuit responsive to said comparator and to said video gate signals for generating a signal; and means responsive to said signal for blocking said first video gate.
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