Purpose of the development: Technical testing of automobile motors.

Advantages over analogues: This constructive scheme was suggested for elimination strong vibrations and high temperature that come from the engine in motion. The sensor element is in a direct contact with the engine, while the measuring device can be removed at the distance of up to 1.5 m. An advantage of the scheme is that the active element of the sensor - optical fiber - is not placed in a direct contact with the aggressive environment of the engine cylinder. Besides, in the manufactured device, a signal is transmitted throughout a laser beam, which insures a safe protection against electromagnetic and loud sounds that could be produced when the engine is working. This increases precision and the resistance of the device.

The development stage readiness: tested in laboratory condition

Description of the development:
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The working principle of the sensor consists in modifying conditions of light spreading in an optical fiber under the action of a lateral charge. The lateral action on the optical fiber surface induces microcurves of the optical fiber, which leads to modification of boundary conditions of the spreading light from the fiber, inducing light losses (ways of letting out). The scheme-block diagram of the sensor element based of optical fibers and made for the pressure control in the combusting chamber of the internal combustion engines. The structure of the primary sensor - the sensor is made of an element -whose elements are: a flexible diaphragm - 1, made of a special alloy whose lateral surface - 2 is of the crenellated shape, an optical fiber - 3, and a static countermodulator - 4. The contact with gases from the engine cylinder assures modification at combusting, shown on the diaphragm curves, that influences the lateral surface of the optical fiber. The diaphragm crenels induce microcurves of the optical fiber, thus modifying laser radiation intensity in the fiber. Further investigations have shown that for the optimal performance of the crenelled diaphragm (size and periodicity of crenels) the signal modulation amplitude of over 50% can be reached.

Possibility of transfer abroad:
Licence's sale
Combinated reduction to industrial level

Photo

Country Moldova

For additional information turn to:
E-mail: gal@uintei.kiev.ua