CN2544280Y

CN2544280Y - High-seletivity carbon oxide alarm device

Info

Publication number: CN2544280Y
Application number: CN 02216941
Authority: CN
Inventors: 王磊; 马学童
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-19
Filing date: 2002-04-19
Publication date: 2003-04-09
Anticipated expiration: 2012-04-19

Abstract

A CO alarm apparatus with high selection pertains to the technical field of gas monitoring and pattern recognition, and is applied to a place which needs to monitor and control CO concentration, consisting of a array probe (1) of a gas sensor, a signal optimization processing module (2), a threshold comparison module (3), an acoustic-optical warning device (4), a controlling and extending interface (5) and a power rectifier (6), wherein, the array probe (1) of the gas sensor comprises a plurality of sensors (7) and an auto temperature-controlling module (8) and has good stability with gas response larger than 20ppm and high sensitivity, thus greatly improving the selection of CO alarm. The whole alarm apparatus has good anti-crosstalk sensitivity and the sensor can be replaced conveniently. The utility model has the advantages of low false alarm rate, low cost and high precision, and is applicable to CO safety alarm for a family and a place which adopt coal stoves or gas pipelines.

Description

The carbon monoxide alarm of high selectivity

Technical field

The carbon monoxide alarm of high selectivity belongs to gas-monitoring and mode identification technology, is applicable to the place that needs the Monitoring and Controlling carbonomonoxide concentration.

Background technology

Existing carbon monoxide alarm, because its sensor generally all has the gas response band of broad, as responsive bandwidth one is big in 100ppm, therefore to needing the gas of specific aim monitoring, the sensitivity of its gas is low, poor selectivity, to with at smoke from cigarette, soot gas, under the situation of common indoor gas coexistence such as inflammable gas, cross-sensitivity is in various degree arranged and bigger response is arranged, just be easy to produce flase drop as will monitor CO gas the time and survey and cause false alarm, and the cost height of existing carbon monoxide alarm, apply difficulty.

Summary of the invention

In order to overcome the deficiency of existing carbon monoxide alarm, the utility model provides the carbon monoxide alarm that a kind of cross-sensitivity simple in structure, anti-is strong, stability is high.

The utility model is popped one's head in by gas sensor array, the signal optimizing processing module, and the threshold value comparison module, acoustic-optic alarm and electrical equipment control and power source conversion control module are formed.The gas sensor array probe adopts several CO gas sensors and automatic temperature-adjusting control mould to form soon, because gas sensor has good gas-selectively and response sensitivity in 280-300 ℃ of temperature range, so be controlled at temperature in this scope and make long-term temperature fluctuation be no more than 3 ℃, steadily in the long term gas is selected accurately with the assurance gas sensor, gas responds greater than 20ppm.By the gas sensor array detected signal of popping one's head in, remove in the work of disturbing with humidity compensate through signal optimizing processing module completion rate, export corresponding alerting signal and output control signal through the threshold value comparison module again, with direct pilot relay and external unit, can reduce the purpose of carbonomonoxide concentration in the environment soon to harmless level as the control scavenger fan.

Advantage of the present utility model is: adopt the fast array probe of forming of gas sensor and automatic temperature-adjusting control mould, good stability, the gas response is greater than 20ppm, highly sensitive, and array probe uses for a long time by behind the contamination by dust sensor, can be very easily emat sensor and can not constitute influence more to the performance of alarm.The signal optimizing processing module can accurately be controlled sensor temperature and reduce humidity and other gas, as: the smoke from cigarette kitchen fume is to the interference of monitored signal, and the threshold value comparison module can be adjusted the threshold value of reporting to the police and requiring, and makes the suitable environment of alarm flexible.Whole alarm has good anti-cross-sensitivity, has improved the selectivity that carbon monoxide is reported to the police greatly, and has greatly reduced cost, is applicable to the family and the place carbon monoxide security alarm that use coal stove or piped gas.

Description of drawings

Accompanying drawing is the utility model embodiment synoptic diagram, wherein;

Fig. 1 is the utility model structural representation;

Fig. 2 is gas sensor array probe and a circuit diagram in the utility model.

Embodiment

Now in conjunction with the accompanying drawings the utility model is further described: the utility model is by gas sensor array probe 1, signal optimizing processing module 2, threshold value comparison module 3, acoustic-optic alarm 4, control expansion interface 5 and power rectifier 6 are formed, and wherein gas sensor array probe 1 is made of sensor 7 and automatic temperature-adjusting control mould fast 8.During work, energized provides power supply for whole alarm after power rectifier 6 rectification step-downs.Behind the power connection, gas sensor array probe 1 begins preheating and reaches 280 ℃-300 ℃ under fast 8 controls of automatic temperature-adjusting control mould, then enter carbon monoxide monitoring state, signal optimizing processing module 2 makes its module rearwards that the signal of continous-stable is provided according to the optimum working temperature point of the response condition selection sensor of gas sensor array probe 1.After this signal is handled through threshold value comparison module 3, if reach warning concentration, start acoustic-optic alarm 4 and send alerting signal, control expansion interface 5 output binary control signals simultaneously, the control external unit, as: it is minimum that the work of startup scavenger fan is reduced to harmful gas concentration.In being subjected to monitoring range carbon monoxide gas concentration return to normal after and a period of time of delaying time stop to report to the police and the output of stop control signal automatically.

Claims

1. the carbon monoxide alarm of high selectivity, be made up of gas sensor array probe (1), signal optimizing processing module (2), threshold value comparison module (3), acoustic-optic alarm (4), control expansion interface (5) and power rectifier (6), it is characterized in that: gas sensor array probe (1) is made of sensor (7) and automatic temperature-adjusting control mould fast (8).