公开(公告)号：US4104609A

公开(公告)日：1978-08-01

申请号：US797145

申请日：1977-05-16

申请人： Yukihiko Minegishi ,  Shokichi Sato ,  Toshikazu Yamada

发明人： Yukihiko Minegishi ,  Shokichi Sato ,  Toshikazu Yamada

IPC分类号： G01S7/62 ,  G01S15/14 ,  G01S15/96 ,  G01S9/70

CPC分类号： G01S15/96 ,  G01S15/14 ,  G01S7/62

摘要： In a fish-finder of the type emitting ultrasonic pulses into the water and receiving and displaying the reflected waves, the received reflected waves are converted into digital signals corresponding to their levels and written into a main memory as information of one display line of a color cathode ray tube display. The main memory has a capacity of storing information of one picture frame of the color cathode ray tube display, and is read out repeatedly. The read-out signals are converted into color signals according to their levels and the color signals are supplied to the color cathode ray tube. Every time a new reflected wave is written into the main memory, the stored content of the main memory is partly removed so that the oldest display on the screen may disappear and, at the same time, the display on each display line is shifted to the older display line.

摘要翻译： 在将超声脉冲发射到水中并接收和显示反射波的类型的捕鱼器中，接收到的反射波被转换成对应于其电平的数字信号，并被写入主存储器，作为一个颜色的一条显示线的信息 阴极射线管显示。 主存储器具有存储彩色阴极射线管显示器的一幅画面信息的能力，并被重复读出。 读出的信号根据其电平被转换为彩色信号，并将彩色信号提供给彩色阴极射线管。 每次将新的反射波写入主存储器时，主存储器的存储内容被部分地去除，使得屏幕上最旧的显示可能消失，并且同时将每个显示行上的显示转移到 旧显示行。