CN201600762U

CN201600762U - A smoke dimming rate detection device

Info

Publication number: CN201600762U
Application number: CN201020108482XU
Authority: CN
Inventors: 王勇俞; 董文辉; 梅志斌; 宋珍
Original assignee: Shenyang Fire Research Institute of MEM
Current assignee: Shenyang Fire Research Institute of MEM
Priority date: 2010-02-05
Filing date: 2010-02-05
Publication date: 2010-10-06
Anticipated expiration: 2020-02-05

Abstract

A smoke dimming rate detection device, which belongs to the technical field of fire monitoring, includes a smoke signal part and a control circuit part, the smoke signal part includes a smoke chamber, and a reflector is installed in the smoke chamber; a control circuit is installed in the box, and the control circuit part includes Optical anechoic chamber, sensor, optical path pool and circulation flue are installed between its two parts. An optical darkroom is arranged under the alarm device box, and a photoelectric cell 1 and a sensor are installed in the dark room, and lenses are respectively installed on the photoelectric cell 1 and the sensor, and an optical path pool is above the two lenses, and an optical path pool is installed in the optical path pool corresponding to the sensor. Phototube 2, a reflector is installed parallel to the optical path pool above the optical path pool, the output of the sensor in the optical darkroom is connected to the amplifying circuit, and the signal processing circuit is connected to the signal input and output circuit, and the photoelectric tube 1 in the optical darkroom is connected to the photoelectric tube drive circuit connect. The smoke obscuration rate detection device is simple in structure, easy to install and use, and has a long service life, and is suitable for detection and use in various fire-fighting facilities.

Description

A kind of light extinction rate of smoke pick-up unit

Technical field

The utility model belongs to the fire monitoring technical field.

Background technology

Current, along with the sane development fast of Chinese society economy, fire protection sector more and more comes into one's own, society has also proposed more higher requirements to fire protection sector, at present, what generally use on the market is that general smoke detector is as the major product in the auto fire-detection, annual at present new about 5,000,000 detectors of installing in urban architecture, just have about 70% to be the product of this kind general type, the advantage of this product: simple in structure, cost is low, easy to install, its not enough aspect: the characteristic that sensitivity is adjustable easily causes report to the police lagging behind; The aging performance of system that causes of smoke detector descends; The deficiency of on-the-spot checkout equipment can't guarantee the good operation of system;

At present, in the course of receiving of fire engineering, owing to there is not relevant detection equipment, so mostly be to test by burning-point cigarette or cigar lighter, but, the cigarette source of these equipment neither has standard and stability, do not have repeatability and consistance yet, these examination cigarette equipment also lack the means that smokescope is detected simultaneously, can't whether reach the judgement that quantification is made in the requirement of corresponding detection response performance to it, and burning-point cigarette or cigarette amount that cigar lighter took place all substantially exceed the requirement of detector sensitivity response, cause now smoke detector and system thereof are lacked a judgement accurately and effectively at the fire engineering scene to the response performance of fire, therefore, can't judge accurately that smoke detection system is at the scene to the response sensitivity of fire signal.This acceptance method, can only prove that smoke detection system can produce response to the cigarette of high concentration, and can not be accurately, this detection system of objective appraisal true degree of protection that can reach in this occasion, therefore can't guarantee that system is in the middle of the good working order always.

The utility model content

For solving the deficiency of above pick-up unit structure, the purpose of this utility model provides a kind of light extinction rate of smoke pick-up unit, utilizes smoke signal to combine with control circuit and detects, to reach to detection quick and precisely highly sensitive purpose.

The technical solution of the utility model is achieved in that the utility model detects the light extinction rate of smoke pick-up unit and includes smoke signal part and control circuit part, and wherein, smoke signal partly includes the smog chamber, and reflector is housed in the smog chamber; Control circuit is housed in the casing, control circuit partly includes optical dark room, sensor, amplifying circuit, signal processing circuit, photoelectric tube 1, the photoelectric tube driving circuit, signal input and output circuit is equipped with optical path pool and cycle flue between its two parts, this warning device connects: be provided with optical dark room below the warning device casing, photoelectric tube 1 and sensor are housed in the darkroom, corresponding to the top lens that are equipped with respectively of photoelectric tube 1 and sensor, be optical path pool above two lens, in optical path pool, photoelectric tube 2 is housed with the sensor correspondence position, the parallel reflector that is equipped with optical path pool above the optical path pool, the sensor output of optical dark room connects amplifying circuit, is connected with signal input and output circuit through signal processing circuit, simultaneously, photoelectric tube 1 in the optical dark room, photoelectric tube 2 is connected with the photoelectric tube driving circuit in the optical path pool, at last, signal input and output circuit is connected with peripheral circuit, and signal is output as the smokescope signal.

The utility model advantage: the light extinction rate of smoke pick-up unit is simple in structure, and is easy to install, and long service life is adapted at detecting in the various fire fighting devicies and uses.

Description of drawings

Fig. 1 is a light extinction rate of smoke pick-up unit structure principle chart;

Fig. 2 is that light extinction rate of smoke pick-up unit light source drives electrical schematic diagram;

Fig. 3 is a light extinction rate of smoke pick-up unit amplifying circuit electrical schematic diagram;

Fig. 4 is a light extinction rate of smoke pick-up unit signal processing circuit electrical schematic diagram;

Fig. 5 is a light extinction rate of smoke pick-up unit signal input and output circuit electrical schematic diagram.

Embodiment

The utility model light extinction rate of smoke pick-up unit detailed structure is illustrated by embodiment and accompanying drawing.

Its one-piece construction as shown in Figure 1, photoelectric tube 1 is connected with the photoelectric tube driving circuit respectively with photoelectric tube 2, each free triode of photoelectric tube drives, as shown in Figure 2, sensor output is through amplifying circuit, signal processing circuit is connected with imput output circuit, and wherein signal amplification circuit is made up of two line amplifiers, as shown in Figure 3;

Signal processing circuit is finished by monolithic establishment U11, and signal input and output circuit is controlled by triode, and the high level that powers on is for receiving, and the low level that powers on is for sending, by the input and output of triode control signal, as Fig. 4, shown in Figure 5;

Its signals transmission of light extinction rate of smoke pick-up unit is: photoelectric tube 1 is launched infrared light, seeing through lens is launched plate through optical path pool and fires back through lens and enter sensor, sensor converts infrared signal to electric signal, by the logical amplifying circuit of preposition band, output to signal processing circuit after the conversion of signals, signal processing circuit is the amplitude collection of input electrical signal and calculate current smokescope, provides concentration signal by signal input and output circuit.Photoelectric tube 2 uses as power-on self-test test, and whether the work that is used to detect receiving sensor is normal.

Claims

1. A smoke dimming rate detection device is characterized in that the device includes a smoke signal part and a control circuit part, wherein the smoke signal part includes a smoke chamber, and a reflector is housed in the smoke chamber; a control circuit is housed in the casing, The control circuit part includes an optical darkroom, a sensor, an amplifier circuit, a signal processing circuit, a photocell (1), a photocell drive circuit, and a signal input and output circuit. There is an optical path pool and a circulating flue between the two parts. Device connection: There is an optical darkroom under the alarm device box, and a photoelectric cell (1) and a sensor are installed in the dark room, and lenses are respectively installed on the top of the photoelectric cell (1) and the sensor. A photoelectric cell (2) is installed in the corresponding position of the sensor in the optical path cell. The photoelectric cell (2) is used as a power-on self-test to detect whether the receiving sensor is working normally. A reflector is installed on the optical path cell in parallel with the optical path cell. , the sensor output in the optical darkroom is connected to the amplifier circuit, and the signal processing circuit is connected to the signal input and output circuit. Connect, the signal output is smoke density signal.