JPH02114305A - Obstruction detector for construction machine - Google Patents

Obstruction detector for construction machine

Info

Publication number
JPH02114305A
JPH02114305A JP26708788A JP26708788A JPH02114305A JP H02114305 A JPH02114305 A JP H02114305A JP 26708788 A JP26708788 A JP 26708788A JP 26708788 A JP26708788 A JP 26708788A JP H02114305 A JPH02114305 A JP H02114305A
Authority
JP
Japan
Prior art keywords
pulse
obstruction
operator
distance
buzzer
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.)
Pending
Application number
JP26708788A
Other languages
Japanese (ja)
Inventor
Kiyoharu Nakao
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP26708788A priority Critical patent/JPH02114305A/en
Publication of JPH02114305A publication Critical patent/JPH02114305A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To inform dangerousness to an operator when a worker is entering into a dangerous area by using a sensor for detecting the approach of an obstruction by an ultrasonic pulse, and when the pulse is reflected on a point nearer than a set distance, outputting an alarm signal and buzzing a buzzer.
CONSTITUTION: A pulse generated from a pulse generating circuit 1 is sent to a transmitting/receiving vibrator 3 through a power amplifier 5 and an ultrasonic wave pulse is outputted from the vibrator 3. The ultrasonic wave pulse is reflected by an obstruction, the reflected pulse is received by the vibrator 3, time required from the pulse sending up to its reception is counted up by a counter 7 to calculate a distance from the vibrator 3 to the obstruction and the calculated result is compared with a previously set distance by a comparator 8. When the calculated result is shorter than the set distance, an alarm signal is outputted to a buzzer driver 4 to buzz a buzzer arranged near an operator's ear. Since the buzzer is driven when an obstruction (a worker or the like) is entering into a dangerous area near a vehicle body to inform dangerousness to the operator, the operator can be allowed to evade the dangerousness.
COPYRIGHT: (C)1990,JPO&Japio
JP26708788A 1988-10-25 1988-10-25 Obstruction detector for construction machine Pending JPH02114305A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26708788A JPH02114305A (en) 1988-10-25 1988-10-25 Obstruction detector for construction machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26708788A JPH02114305A (en) 1988-10-25 1988-10-25 Obstruction detector for construction machine

Publications (1)

Publication Number Publication Date
JPH02114305A true JPH02114305A (en) 1990-04-26

Family

ID=17439862

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26708788A Pending JPH02114305A (en) 1988-10-25 1988-10-25 Obstruction detector for construction machine

Country Status (1)

Country Link
JP (1) JPH02114305A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134721B2 (en) 2011-03-10 2015-09-15 Caterpillar Inc. Worksite system having awareness zone mapping and control
JP2017078315A (en) * 2015-10-22 2017-04-27 株式会社神戸製鋼所 Interference prevention device for construction machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134721B2 (en) 2011-03-10 2015-09-15 Caterpillar Inc. Worksite system having awareness zone mapping and control
JP2017078315A (en) * 2015-10-22 2017-04-27 株式会社神戸製鋼所 Interference prevention device for construction machine

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