RU2312397C2 - Specialized low frequency warning device - Google Patents

Abstract

FIELD: the invention refers to radio technique and may be used in fire fighting systems in quality of a warning device about the fire danger for invalids with sensor disturbances in health(hearing, vision, combined disturbances).

SUBSTANCE: the warning device has an alarm stub, a control block, a state indicator, a voltage converter, a stroboscope, a power amplifier, a low frequency radiator, an accumulator, a feeding controlling block and the charge of the accumulator. At that the controlling block produces a specialized low frequency non-periodic signal of a given algorithm which goes after that through the power amplifier to the low frequency radiator converts it into acoustic signals in the range of 40-100 Hz with the power up to 105 dB; and also produces a signal actuating the voltage converter which provides the stroboscope's work and forms signals of light warning with pulse recurrence rate 20-40 impulses in a minute.

EFFECT: increases efficiency of the warning device.

2 cl, 3 dwg

Description

The invention relates to the field of radio engineering and can be used in warning systems for fire safety.

One of the constituent elements of fire-technical protection equipment is fire alarms - devices for generating a signal about a fire and bringing it to the subject (person). According to existing standards, depending on the nature of the issued signals, there are sound, light, and voice sirens with the inclusion of all sirens in one or more lines, depending on the order of notification.

For the most part, fire warning equipment and information on the totality of organizational measures of technical means aimed at preventing people from exposure to dangerous fire factors and limiting material damage from it are designed for people who do not have hearing impairments in health and vision.

At the same time, the country has a significant number of children with hearing impairments in hearing, vision and musculoskeletal, studying in special (correctional) educational schools of I, II type (deaf and hard of hearing), III, IV type (blind and partially sighted) , V, VI species (with violation of the musculoskeletal system and scoliosis). To enhance the perception of people with hearing impairments, as a rule, sound amplification and the formation of a frequency response based on measuring the patient's audiogram (depending on hearing thresholds and uncomfortable volume versus pitch) are used.

Known [1] sirens with an amplified sound pressure level based on a piezoelectric sound emitter (siren 023 "Pipe", "Pipe-2", "Howler"), as well as sirens from Wheelock - MTWP 2475 W, NS 4-24 1575 W - FP, ET - 1010/1080, Inferno with amplified sound pressure level and complemented by reinforced pulsed light annunciator (built-in strobe - flash).

An increase in sound pressure (up to 125 dB), especially in the case of Inferno, contributes to a shocking acoustic effect on the hearing organs of patients, as well as on healthy people, causing an unacceptable state of panic in critical situations, and is accompanied by syndromes - a sharp headache and nausea.

The closest in technical essence to the alleged invention are devices that use the low-frequency component of the sound range as a warning signal to persons with hearing impairment [2], namely:

- sound and voice annunciators using a low-frequency signal (MZ-1, MZM-1 calls, vandal-proof voice annunciators for transmitting voice and light signals from Wheelock). According to the developers, the device is highly effective in those places where there may be hearing impaired. The devices provide improved sound characteristics when reproducing typical low-frequency signals, such as "Siren", "Code 3", etc .;

- systems using combined (light and sound) sirens 048848 (eff-eff) with a specially designed loudspeaker DKL, which allows the use of a low-frequency electric signal generated by an external source of the required power and height. However, the use of this type of sirens is complicated due to the need to form an external low-frequency electrical signal and insufficient power, especially if they are used in correctional schools.

The aim of the invention is the creation of a fire hazard warning device for persons with disabilities with sensory impairment of health (hearing, vision, combined disorders), taking into account the characteristics of their health and recent advances in radio engineering, microelectronics and information transfer.

The solution to the problem is achieved by the fact that a specialized low-frequency siren containing a control unit generates a specialized low-frequency aperiodic signal of a given algorithm, which is transmitted through a power amplifier to a low-frequency emitter, converting it into acoustic, vibrational vibrations and signals affecting the objective response of the residual auditory function along the bone, air conduction, and the signal triggering the voltage converter, providing the operation of the strobe, forming its light warning signals.

The technical result consists in increasing the effectiveness of warning people with disabilities and health, in particular deaf and hard of hearing, due to the combined warning of specialized low-frequency aperiodic signals that affect the objective response of the residual auditory function in bone, air conduction, and light warning signals.

Figure 1 presents the structural diagram of a specialized low-frequency siren.

The specialized low-frequency siren contains an alarm loop unit 1, a control unit 2, a status indication unit 3, a voltage converter 4, a strobe 5, a power amplifier 6, a low-frequency emitter 7, a control unit 8, a power and battery charge unit 9, and a battery 10.

Specialized low-frequency siren operates as follows. Alarm loop unit 1 monitors the loop for the presence of a Fire signal. When an alarm occurs, the control unit 2 generates a specialized low-frequency aperiodic signal supplied to the power amplifier 6, and a signal that triggers the voltage converter 4. The signal from the power amplifier 6 is supplied to the low-frequency emitter 7, which converts it into acoustic and vibrational vibrations. The connecting wires from the power amplifier 6 to the low-frequency emitter 7 are a loop that provides control over the operability of the vibroacoustic warning unit. The voltage Converter 4 provides the operation of the strobe 5, which generates light warning signals. Short-term aperiodic impact on the notifications in order to attract attention is carried out according to a given algorithm. The algorithm was developed on the basis of data obtained experimentally (3) as a result of a study of the effects of acoustic, vibration and light signals on persons with disabilities and health, in particular deaf and hard of hearing. [3] The low-frequency emitter 7 is an IV subwoofer that is rigidly attached to the floor of the room.

In the absence of a "Fire" signal, the control unit 8 periodically checks for the presence and level of supply voltage of aids to navigation, battery charge 10, a cable of aids to navigation with a low-frequency emitter 7, the load capacity of a battery 10 and transmits data to a control unit 2. If the cable of aids to navigation with a low-frequency emitter 7 is violated, the load capacity of the battery 10 is lower than the set level and the long-term absence of the supply voltage, the control unit 2, through the alarm loop unit 1, transmits an error signal for the control panel OP UA "ISA - Redoubt" via the t evogi.

The power supply 9 maintains the charge of the battery 10 at a predetermined level regardless of the type of external supply voltage in a given range of values.

The control unit 2 using the state indication unit ССО 3 displays information on the operation mode of the device, compliance with the load capacity of the battery 10 to a predetermined level, on the serviceability / malfunction of the loop with a low-frequency emitter 7, and on the presence / absence of an external power source.

Structurally, a specialized low-frequency siren is made in the form of a device containing an alarm loop unit 1, a control unit 2, a status indication unit 3, a voltage converter 4, a power amplifier 6, a control unit 8, a power supply and battery charge unit 9, and a battery 10 with stroboscope 5. To this device is connected from one to four low-frequency emitters.

The specialized low-frequency siren is made on a typical elemental base corresponding to the selected field of application.

The main technical specifications are listed below:

Supply voltage - ~ 24 ÷ 26V 50 Hz. Maximum current consumption in battery mode - no more than 240 mA in standby mode and alarm mode - no more than 20 mA. Built-in battery backup СНО-1 with 2 low-frequency emitters 2 × 4, 2 Ah СНО-1 at 4 low-frequency radiators 2 × 7 Ah СНО-1-1 1 × 4, 2 Ah Operating time from the built-in backup power supply in standby mode - at least 48 hours in alarm mode - not less than 30 min СНО-1 and СНО-1-1 are equipped with a pulsed light annunciator: pulse repetition rate - 20-40 imp / min

СНО-1-1 is equipped with an automatic voice alert.

The range of radiated sound frequencies - СНО-1 - 40-120 Hz СНО-1-1 - 4000-8000 Hz Sound power output: СНО-1, - not less than 100 W СНО-1-1 - not less than 5 W Type of voice alert СНО-1-1 programmable

The frequency of sound and voice signaling is determined by the control panel of the OP UO "MSA-Redut".

Overload and short circuit protection - fuse.

Switching time from main power to standby - no more than 10 ms Operating temperature range - from 0 to + 50 ° C Overall dimensions of the control unit (with cable entries and pulsed light source) - no more than 250 × 350 × 160 mm Weight of control unit (without battery) - no more than 3 kg Overall dimensions of a low-frequency radiator - no more than 550 × 350 × 350 mm Mass of a low-frequency radiator - no more than 7 kg

Average life - 10 years (excluding battery life)

Specialized low-frequency sirens can be grouped by serial connection on the alarm loop to increase the warning zone (figure 2).

Figure 3 presents photographs of a specialized low-frequency siren, consisting of a control unit and a low-frequency emitter.

The practical value of the invention is confirmed in 2004 by the supply of specialized specialized low-frequency sirens at the request of the Federal Education and Science Ministry of the Russian Ministry of Science in 176 (correctional) institutions of I, III and V types in the amount of 1950 pieces.

Bibliography

1. Security systems. Intersectoral thematic catalog. / Grotek /, Moscow, 2005

2. "Security Systems". Magazine No. 3, Moscow, 2005

3. "Binaural hearing aid for various forms of hearing loss." Guidelines No. 96/228 of the Scientific Center of Audiology and Hearing Prosthetics of the Ministry of Health of the Russian Federation, Moscow, 1996

Claims (2)

1. A siren for people with disabilities and hearing impairment, comprising a control unit connected to the alarm loop unit, a power amplifier, a low-frequency radiator, a battery with control units for its charge and the presence and voltage level of the siren, a voltage converter and a strobe the fact that the control unit is designed to generate an aperiodic signal upon receipt of an alarm signal from the loop, while the aperiodic signal is fed to the power amplifier and will convert eh voltage that provides the strobe and forming them light pulses with a repetition rate of 20-40 pulses per minute, and a low frequency oscillator provides the conversion of an aperiodic signal to a power amplifier into acoustic oscillations concentrated in the range of 40-100 Hz with a power of up to 105 dB. 2. The siren according to claim 1, characterized in that it is made with the possibility of rigid installation on the floor to create a vibration alert.

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