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Method and device for detecting target object

一种探测装置、物标的技术，应用在测量装置、无线电波测量系统、声波的再辐射等方向，能够解决数据量庞大、高速处理障碍、单体鱼检测精度限度等问题

Active Publication Date: 2012-07-04
FURUNO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-speed processing is hindered by the large amount of high-speed sampling data
In addition, when detecting rises and falls using data processed by average value processing or maximum value processing, there is a certain limit to the detection accuracy of individual fish depending on the data processing method and the utilization method of the processed data.

Method used

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  • Method and device for detecting target object
  • Method and device for detecting target object
  • Method and device for detecting target object

Examples

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Embodiment Construction

[0037] figure 1 It is a block diagram showing an embodiment of an underwater detection device to which the object detection device of the present invention is applied. The underwater detection device 10 includes a probe 11 which is mounted on the bottom of a ship or the like and has one or a predetermined number of ultrasonic transducers arranged therein. The probe (ultrasonic sensor) 11 is configured to transmit an ultrasonic beam having a narrow directivity of, for example, several degrees to about 10 degrees (degrees) in a predetermined downward direction, preferably directly downward. The transmission circuit 12 generates a drive signal having a predetermined pulse width for exciting the ultrasonic vibrator constituting the probe 11 . In addition, in the form in which the probe 11 is composed of a plurality of ultrasonic transducers, it is only necessary to weight the excitation signal of each ultrasonic transducer or perform phase control to obtain a desired directivity ...

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Abstract

The invention provides a method and a device for detecting a target object of a single fish with high precision. The underwater detecting device (10) for detection of the single fish comprises a first peak holding module (1611) for extracting, at every predetermined cycle, a maximum value of the reception signals obtained in the predetermined cycle, a second peak holding module (1612) for extracting, at the same predetermined cycle, a minimum value of the reception signals obtained in the predetermined cycle, and a target object determiner (162) for determining a level rising and a level falling of the reception signal indicating the target object by using a gradient between the minimum and maximum values extracted at different peak holding positions.

Description

technical field [0001] The invention relates to a target detection device and a target detection method for sending out detection pulses and detecting the target according to the received signal returned. Background technique [0002] Conventionally, there is known a measuring fish finder that performs measurement of fish bodies for the purpose of surveying the amount of fishery resources and the like. In this kind of measuring fish detector, the ratio of the sound pressure level of the ultrasonic wave sent from the probe to the sound pressure level of the echo reflected by the fish, that is, the reflection strength TS (Target Strength), is obtained, and the reflection strength is used. The relationship between the intensity TS and the fish body length L, the body length of the fish is calculated from the obtained reflection intensity TS. [0003] The measurement and measurement of fish body needs to identify and detect individual fish and fish schools. For example, Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/96G01S17/89
CPCG01S15/96G01S7/527G01S17/89
Inventor 大西由利子御园生哲史
Owner FURUNO ELECTRIC CO LTD