JPH0141949B2 - - Google Patents

Info

Publication number
JPH0141949B2
JPH0141949B2 JP29951385A JP29951385A JPH0141949B2 JP H0141949 B2 JPH0141949 B2 JP H0141949B2 JP 29951385 A JP29951385 A JP 29951385A JP 29951385 A JP29951385 A JP 29951385A JP H0141949 B2 JPH0141949 B2 JP H0141949B2
Authority
JP
Japan
Prior art keywords
signal
frequency
counting
circuit
submarine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP29951385A
Other languages
English (en)
Japanese (ja)
Other versions
JPS62157585A (ja
Inventor
Takashi Nagao
Isao Takiguchi
Yutaka Kashiwase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Keiki Co Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP29951385A priority Critical patent/JPS62157585A/ja
Publication of JPS62157585A publication Critical patent/JPS62157585A/ja
Publication of JPH0141949B2 publication Critical patent/JPH0141949B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
JP29951385A 1985-12-28 1985-12-28 船速測定装置の周波数検出回路 Granted JPS62157585A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29951385A JPS62157585A (ja) 1985-12-28 1985-12-28 船速測定装置の周波数検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29951385A JPS62157585A (ja) 1985-12-28 1985-12-28 船速測定装置の周波数検出回路

Publications (2)

Publication Number Publication Date
JPS62157585A JPS62157585A (ja) 1987-07-13
JPH0141949B2 true JPH0141949B2 (enrdf_load_stackoverflow) 1989-09-08

Family

ID=17873557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29951385A Granted JPS62157585A (ja) 1985-12-28 1985-12-28 船速測定装置の周波数検出回路

Country Status (1)

Country Link
JP (1) JPS62157585A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS62157585A (ja) 1987-07-13

Similar Documents

Publication Publication Date Title
JP2008267834A (ja) 水中探知装置
US3766518A (en) Apparatus for determining distance
WO2000023815A1 (en) Range measuring system
JP2553480B2 (ja) 魚群探知機の単体魚判別回路
US4685093A (en) Speed measurement device
US3745520A (en) Method for determining the distance travelled over by a vehicle with respect to a reference surface and device for practising said method
JPH0943360A (ja) 浸水検出方法
JPH0141949B2 (enrdf_load_stackoverflow)
JP2543610B2 (ja) 海底反射波位置検出装置
JPS58186067A (ja) 距離測定方式
JPH0337145B2 (enrdf_load_stackoverflow)
Carpenter A digital echo-counting system for use in fisheries research
JP2900631B2 (ja) セクタ・スキャン・インジケーション回路
JP2501032B2 (ja) 超音波物体検知器
RU2045081C1 (ru) Эхолокатор для распознавания морских грунтов
JPS5839971A (ja) 超音波ドップラ速度検出方法
JP3162873B2 (ja) 船舶用速度測定装置
JP2500404Y2 (ja) 船速測定装置
JPS6239336Y2 (enrdf_load_stackoverflow)
JPS603556A (ja) 超音波流向流速計におけるとくに船速を測定する方法
JP2500403Y2 (ja) 船速測定装置
JPH06300840A (ja) 水深探測装置
JPH0141948B2 (enrdf_load_stackoverflow)
JPH1062545A (ja) 魚群探知機における海底検出方法及び装置
JPH0621033Y2 (ja) 魚群探知機