Detecting device, fish finder and detecting method

摘要

A detecting device is provided. The detecting device detects target objects. The detecting device includes a transmitter configured to transmit transmission waves, a receiver configured to generate reception signals from reflection waves of the transmission waves, a target echo signal detecting module configured to detect target echo signals among the reception signals, a size calculating module configured to calculate a size of each the target objects based on the corresponding target echo signal, and a frequency index value distribution calculating module configured to calculate frequency index values for respective size ranges based on the calculated sizes, each frequency index value being an index of the number of the target objects. The frequency index value distribution calculating module has a first updating submodule configured to update the frequency index value for each size range every predetermined period of time.

主权项

1. A detecting device for detecting target objects, comprising:
a transmitter configured to transmit a transmission wave at every predetermined timing; a receiver configured to generate reception signals from reflection waves of the transmission waves; a target echo signal detecting module configured to detect among the reception signals generated by the receiver, target echo signals caused by the target objects; a size calculating module configured to calculate a size of each of the target objects based on the corresponding target echo signal; and a frequency index value distribution calculating module configured to calculate frequency index values for respective size ranges based on the sizes calculated by the size calculating module, each of the frequency index values being an index of the number of the target objects, the frequency index value distribution calculating module further having a first updating submodule configured to update the frequency index value for each of the size ranges every predetermined time period, wherein the first updating submodule reduces the frequency index value for each size range at every predetermined time period.