SU964548A1 - Device for registering threshold acceleration - Google Patents

Description

(54) DEVICE FOR 1THURAL REGISTRATION - ACCELERATION

one

The invention relates to instrumentation and can be used in automation to register a given acceleration value in the absence of power supply.

A maximal accelerometer is known, comprising a housing, a magnetic ball fixed in it, which is attracted by a moving magnetic ball, moving under the action of threshold acceleration, Q in a guide chamber in which a microswitch 1 is installed.

The disadvantage of this device is the low registration accuracy due to the demagnetization of magnet, 5 balls operating in an open magnetic field.

The most bluish to vebroobenchesho by technical essence is a threshold accelerometer, comprising a housing, a 20 permanent magnet, an electromagnet, an adjusting stop, normally closed and normally open contacts and an inertial element reinforced

on the suspension between the permanent magnet and the adjusting stop 2.

A disadvantage of the known device is the relatively low detection accuracy of the threshold acceleration associated with the lack of a smooth adjustment of the response threshold and the impossibility of remotely verifying the boron prn.,

The aim of the invention is to improve the detection accuracy of the threshold acceleration.

Claims (1)

This goal is achieved by having a device for registering a threshold acceleration comprising a housing, a permanent magnet, a reset electromagnet, an adjusting stop, normally closed and normally open contacts, and an inertial element mounted on an elastic suspension between the permanent magnet and the adjusting stop , a winding is introduced, located on a permanent magnate, reinforced in an inset ferromate, located on the upper end 366 of the body and containing a movable magnetic shunt installed above the permanent magnesium volume, while the movable contacts are located on the inertia element, and the stationary normally closed and normally open contacts are located on the adjusting stop and on the insert and the ferromagnet, respectively, and the magnetic shunt and adjusting stop are mounted with the possibility of movement along the y-axis of the sensitivity. The drawing shows the structural diagram of the device. Inside the housing 1 on the elastic suspension 2, an inertial element 3 is fixed, consisting of two conductive parts electrically isolated between themselves. An insert 4 of a ferromagnet is mounted on the upper end of the housing 1, in which a permanent magnet 5 with a verification winding 6 located on it is fixed. In the lower part of the housing 1 is an electromagnet 7 reset. Normally closed contacts 8 are located on the inertial element 3 and the adjusting stop 9, located in the hole of the electromagnet-7 reset. The normally open contacts 10 are located on the inertial element 3 and on the inset 4 of ferromagnetgas. Inside the insert 4, a magnetic shunt 11 is also installed with a locking screw 12. A similar locking screw is installed on the adjusting stop 9. The device operates as follows. When the acceleration element 3 acts upon acceleration in the direction of the OO axis, it remains stationary until the inertia force from the linear acceleration exceeds the holding vortex. When the inertia force exceeds the trigger threshold, the inertial element is moved from the initial position to the registration position, breaking the normally closed contacts 8 and closing normally open contacts 10. When the inertial element 3 goes to the trigger position, the permanent magnet 5 in the proposed design , reliably fixes it with a force, which excludes the possibility of transferring the inertial element to the initial state, eliminates the bounce of the inertial element and, accordingly but an electrical signal. In 8, the initial position of the inertial element 3 is established by applying an electric pulse to the reset electromagnet 7. The test winding 6 serves to remotely check the operability and the operation limits of the device. The application of the invention permits the detection of the threshold and limiting accelerations to be extremely accurate. According to the test results of the proposed device, the following basic parameters of the device were determined: a service life of at least 4000 switching cycles (due to the use of tungsten alloy contacts); the range of recorded accelerations is 1.05050 m / s; the accuracy of the threshold setting (when adjusted) is not worse than ± 0.5%; the detection error of the response threshold (during operation) is not more than 10%; registration time is not more than 0.01 s; acceleration mockup weight 0.5 kg; layout dimensions “6O mm. Apparatus of the Invention A device for detecting a threshold acceleration comprising a housing, a permanent magnet, a reset electromagnet, a p & gulirovanny emphasis, normally closed and normally open contacts, an inertial element mounted on an elastic suspension between a permanent magnet and an adjusting emphasis, characterized in that in order to improve the accuracy of registration, a winding is inserted in the device, located on the station n-. nom magnet, reinforced in an insert made of a ferromagnet, placed on the upper end of the housing and containing a movable magnetic shunt mounted above a permanent magnet, while the movable contacts are located on the inertial element, while the fixed contacts are normally open and normally open and located on the adjusting stop and on the insert from a ferromagnet, respectively, the shunt and the adjusting stop being installed with the possibility of moving along the axis of sensitivity of the device. Sources of information taken into account during the examination 1. USSR author's certificate No. 540216, cl. G O1 R. 15/04, 1975. 2, US Patent No. ZO35450, cl. G O1 P 15 / O8, 1962.