Clarion Jointly Develops - Overview Monitoring System with Hitachi Construction Machinery

- Supports Operator Safety Checks Surrounding Construction Machinery -

Cypress, California, (January 24, 2011) – Clarion Co., Ltd. (President: Tatsuhiko Izumi; hereinafter “Clarion”) and Hitachi Construction Machinery, Co., Ltd. (President: Michijiro Kikawa; hereinafter “HCM”) have jointly developed an overview monitoring system to support operator safety checks surrounding machinery. The system enables synthesized images taken from several cameras mounted on construction machinery to be shown on a display from the operator’s seat. The system has already completed basic performance tests using a prototype, and future plans call for commercializing the system in conformance with specifications of HCM’s mining dump trucks and ultra-large hydraulic excavators by spring 2012.

Based on the development of in-vehicle compact camera technology promoted by Clarion under the concept of supporting safe, secure and comfortable driving, the overview monitoring system featuring several wide-angle cameras will be fitted on construction machinery. The images taken from respective cameras will be converted and synthesized and shown on a display from the operator’s seat as a bird’s-eye view focused on the construction machinery. Furthermore, in addition to the proximity of machinery, the operator can switch to “zoom display” and “wide display” in accordance with construction machinery needs requiring wide-area monitoring. With this functionality, operators can quickly comprehend situations surrounding construction machinery such as the positions of other construction machinery or service vehicles.

Up until now, HCM has been continuously promoting initiatives to enhance on-site safety. In 2006, HCM introduced a rear monitoring system as the world’s first standard equipment on all hydraulic excavators that are 6.5 tons or larger.

The overview monitoring system, which has been developed in collaboration with Hitachi Group companies, is expected to significantly contribute to operational safety on site, including the operation of mining dump trucks and ultra-large hydraulic excavators.

System Overview

(Example of mining dump truck equipped with overview monitoring system)


  • 4 cameras ( [1] Front [2] Right side [3] Left side [4] Rear)
  • Image synthesis controller (inside operator’s compartment)
  • Display (inside operator’s compartment)

[External view]

Camera equipment positions ( [1] ~ [4] )

Camera equipment positions

[ Display images ]

Overview (zoom display) + Rear camera image

Overview (zoom display) + Rear camera image

Display distance information using grid points at one-meter intervals

Green: Front camera range of view

Red : Side camera range of view

Overview (wide display) + Rear camera image

Overview (wide display) + Rear camera image

Smoothly Synthesizes and displays wide-range images in proximity and at a distance

Note: The display is currently under development

About Clarion:

Clarion Corporation of America, headquartered in Cypress, California, is a subsidiary of Tokyo-based Clarion Co. Ltd., headquartered in Saitama, which has been a consolidated subsidiary of the Hitachi Group since 2007 and an international leader in car audio and electronics since 1940. The company is involved in the research, development, engineering, design, manufacturing, sales and marketing of mobile entertainment, navigation, communication and safety and security products for the automotive, marine, recreational vehicle, commercial fleet and heavy industry environments. Clarion has been the recipient of numerous awards for design innovation, support, manufacturing and product reliability from independent organizations and customers alike. The company has marketing and sales affiliates in Europe, North and South America, Asia and Australia. Clarion is located on the web at

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