RU8502U1 - VIBRATION DETECTOR - Google Patents

Description

SELECTING DETECTOR

The proposed device relates to the field of sensors1 41 of converters of logical quantities and can find npraieHemie in the burglar alarm to detect the effects on the area, including cars

Known alarm devices comprising a sensor based on a mechanical contact that is capable of changing the spatial position (vibration rotation) of an opening object or by closing a contact (application 05093641097 ST} "

According to the principle of closing the electric circuit mvchanich sh1 1gon "a1B" tom in the form of a flat spring with a mass at the end, the security device SHI2.070.С75 is working, commercially available by the NGO Zarya, Voronezh.

The technical implementation of such devices is characterized by low reliability due to the presence of a mechanical conteist who comments on the electric circuit, the need for additional adjustments of the mechanical system to change the spatial position of the sensor and the limitation in its spatial location, the instability of the sensor

The closest in technical essence to the claimed object is an alarm device for the alarm system for the autosubby (US patent L 4293860), adopted by us for Щ) otype

The device "41rototype is shown in Fig. X and has a vibration detector I for detecting the vibrations generated by 2" The detector contains a direct current source 3, a printed circuit board 4, attached to the bottom of the hood 2, and a spherical element 5 placed on the printed circuit board 4

eoev 13/02, HOKJ 1/32

each of which contains several identical pins. One electrode is connected to one of the outputs of the DC source 3, and the other electrode to the other output of the source. The diameter of the spherical element 5 is sufficient to create an electrical connection of the adjacent pins of both electrodes b and 7 when the element is located by them. The signal device generates an audible alarm in response to a voltage loss of the DC source, which arises as a result of the movement of the spherical element on the vibration circuit board

I will arrange "| The rototica is characterized by disadvantages, namely, that its operation is possible only) and a certain spatial orientation of the board 4, on which the creasing spherical element 5 is located, the reliability of the device is due to the low reliability of mechanical contact in the electrical circuit of the detector, the repeatability of the sensor’s results is low and depends from the initial position of the spherical 5.

The proposed vibration detectors eliminates the disadvantage of the prototype. The block diagram of the device is presented in figure 2, where it is indicated:

I - generator, Z - commutator,

3- emitter

 receiver,

5 syphonic detector

6 key

7 curtain

8 # housing

9 board

The vibration detector consists of a cable (8), in which on the printed circuit board 9 are located: a pulse generator (I) with a high duty cycle, a commutator (2) with an infrared emitter (3) and a receiver (4) located coaxially with each other, a synchronous detector ( 5) and the alarm isolation circuit in the form of a voltage comparator (6) with an XI validity adjuster. The alarm signal arrives at the executive device of the security alarm system of the object. Between the emitter (3) and receiver 4, there is a shutter 7 in the form of a lattice with alternating areas that are transparent and opaque to radiation, fixed at the end of the rod 10, Spring 10 is made as a piece of round elastic wire, The dimensions of the blind 7 are chosen so that any the spatial position of the vibration of the detector of the shutter 7 remained in a submerged state and did not completely come out of alignment with the location of the emitter 3 and receiver 4. The amount of alternating opaque and opaque portions of the shutter 7 knocked out based on the area of the emitted or received surface of the emitter 3 and receiver 4 and should provide an indispensable condition for modulating the flux under external influences on the vibration detector.

The second end of the spring 10 will be mechanically fixed on the printed circuit board 9. The vibration detector body 8 is attached to the body of the protected object, in particular, to the car body. The sensitivity of the vibration detector is changed by the sensitivity regulator 11 by setting the threshold; comparator 6 is set to reduce the current consumption by the vibration detector high-duty pulsed power supply of emitter 3 and high-performance detection11 modulated improved

comes into motion and modifies the radiation flux E receiver 4 converts the pulsed modulation of the amplitude into an electric signal. The synchronous detector 5 extracts the low-frequency envelope of the modulated from the pulse signal. (The integrating circuit of the synchronous detector 5 is switched by the Z switch and by the receiver itself (w-photo diode | 4 in the resistive switching mode. The issued signal is sent to the comparator, depending on the set threshold of sensitivity, the comparator is triggered b. The control signal from the output of the comparator 6 is received to the alarm device 10 of the security alarm system of the object.

The practical implementation of the vibration detector has a small number of elements, high reliability and sensitivity with the possibility of adjusting the latter by the electric method using a variable resistor. The sensitivity of the vibration detector is practically independent of the spatial arrangement of the device body 6 due to the applied method of converting mechanical drives to corus 8 into electric signal, constructions and fastenings of the curtain.

Patent holder - Voronezh Research Institute of Communications.

Deputy Chief Engineer J Shezhko Yu.V.

Claims (2)

1. A vibration detector containing a pulse generator, a switch, an emitter, a receiver with a synchronous detector, a comparator and a board installed in the housing, characterized in that a shutter is installed between the emitter and the receiver in the form of a grating with alternating transparent and opaque sections for radiation, while the shutter is connected to one of the ends of the spring in the form of an elastic wire fixed motionless with the other end on the board.  2. The detector according to claim 1, characterized in that the synchronous detector and emitter are connected to the output of the switch.