Anticollision

The anti-collision system SMIE:

The SMIE anti-collision system is a safety and/or driver assistance device for the management of the tower cranes operations on construction sites with two or more cranes.

It helps the crane operator to anticipate the risk of collision between the moving parts of his crane and those of the neighboring crane. When a risk of collision is detected, the system " takes over " and automatically slows down to a stop the hazardous movements.

Without anticollision system :

With anticollision system :

The anti-collision system also allows the control of areas where load lifting is prohibited (also called zoning).

The system continuously controls the working limits of the crane, it displays information when approaching these limits and, if necessary, automatically slows down the crane to a stop. The usual prohibited zones are areas such as schools, railways, power lines, but also and very often, the boundaries of the site itself.

SMIE : 40 years of experience

Dealing with SMIE means, primarily, to benefit from an unique experience acquired over the years since 1985.

The product:

• Can be installed on all types of cranes, all manufacturers (including luffing jib)

• the driver display not only keeps the crane operator informed about his environment for anti-collision purposes but also provides other precious information such as the trolley position on the jib and slewing angle.

• Easy to install, thanks to its plug and play devices and cables fitted with industrial connectors, it is very economic because 100% reusable from crane to crane at the end of each jobsite; moreover it is 100% compatible with the previous generation.
 

The history

In the 70’s and 80’s there is a reduction of the travelling distances and an increase in the jib lengths of construction cranes. During the same period, the construction method of the "tunnel formwork", widely used after the second world war, is being progressively abandoned whilst the complexity of the buildings increases dramatically. As a result of the new construction methods the cranes are installed and operates closer to each other, creating consequently extended zones of interference between them.

The cranes’ common operating zones increase a lot also amplified by the fact that the demand for reduced construction times pushes the number of cranes up.

One of the direct consequences is the creation of a new risk: the collision between the cables of the higher cranes and the jibs or counter-jibs of the lower cranes.

At the same time, the demand for efficient tools to restrict the movement of loads over sensitive areas (railways, power lines, school yards etc.) appeared.

In order to eliminate the risks of collision without penalising the site's productivity as well as to provide crane drivers with efficient tools like zones prohibition (zoning), SMIE develops anti-collision systems for over 30 years.
 

The decree of August 23, 1947

It is worth recalling the existence of a decree dated 23 August 1947, which defines the precautions to be observed by construction cranes users.

In the years 1970/1980 some sites like nuclear plants to construction sites on which often are 30 cranes and experiencing serious or fatal accidents.

In the early 80 shows the first driving assistance devices, mainly based on analog electronics.

On 07/07/1987, France, a circular from the Ministry of Social Affairs and Employment sets the terms and conditions of tower cranes whose shares zones overlap.

It is in the late 80s, following major advances in digital electronics appear the first microprocessor systems that enable the development of systems COLLISION.

The technical progress and experience gained since the 07/87 circular lead the legislator to publish the technical note of 06/03/1991 which provides the details necessary or indispensable for all.List of cranes we already equipped: Arcomet, Betox, BKT / Zeppelin, Boillot, BPR Cadillon, Comansa, Comedil, Condecta, Jaso, Kroll, Liebherr, Linden, MCA (China, Peiner, Pekazet, Pingon, Potain Raimondi Richier, Simma, Wolff

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