Among the devices that facilitate the "life" of drivers, not the least is a miniature device that received the popular name Antison [1]. He reminds hearing aid I. as he mounted behind the driver's ear. As only the head of the driver leans forward, a loud audible alarm (on head tilts to the side and back of the device does not respond).
It is clear that the signature device antison and filling "brand", which to get not so easy. But there's an easy way out. Domestic industry produces mercury position sensors (tilt), representing a glass housing (12x5 mm) with two terminals-contacts and sealed inside drop of mercury (Fig.1).
Mercury position sensor type RDP-8610 (similar to SS-053) used in cars and motorcycles to control the inclination angle of the suspension, opening hood, trunk, etc., Nothing prevents the use of such the sensor and Antone".
Of course, such a device Antison has disadvantages. It is difficult without special equipment to accurately determine the angle at which Antison. to operate, the sensor is characterized by a noticeable lag, and the mercury inside - high toxicity (if you break sensor). But in Antine these disadvantages do not play a special role. When the driver falls asleep, falls head "good", and by providing the rotation of the sensor in the housing, it is possible to choose the position of its the response accurately. Inertia sensor (delay is tenths of a second) in this unit, you can neglect, and to protect sensor from damage to "pack" it. for example, foam rubber.
The sensor RDP-8610 contains a pair of normally open contacts with extremely permissible switching current is 2 A. operating temperature Range - from -30 to +45°C. When there is adequate protection from external influences RDP works effectively in liquid, wet environments and under conditions of high vibration. Adding food (three element SC-21 with a total voltage of 4.5 V) and the piezoelectric capsule BF1 with a built-in generator AF type 1205FXP (Fig.2), we get the same Antison.
To accommodate the preferred design in the housing of the hearing aid (Fig.3). After setting the desired angle of operation and tests in situ the position of the sensor in the housing securely.
In addition to platismatia, RDP their contacts may include other load (the led. low-power electromagnetic relay, opto-electronic or current key etc.). The battery voltage GB1 is chosen for a specific load.
Practical application of the device Antison can be varied. For example, in the sensor head position when you install it in your helmet computer "gamer", as the sensor position control of building structures (towers or towers, deviating under the action of the wind), etc.
Literature
Author: A. Kashkarov, St.-Petersburg