摘要:
The present invention relates to an analog line-type fixed temperature fire detection cable, characterized in that the cable comprises two detection conductors positioned in parallel, an isolation layer of NTC character, and a fusible insulation layer having a fusion temperature of 20 □ ~ 140 □, with the isolation layer of NTC characteristics and the fusible insulation layer positioned between the two parallel detection conductors. The present invention has the advantage of improved reliability and usable length of the analog line-type fixed temperature detection cable.
摘要:
A fire alarming method based on data fusion comprises steps of : using at least one temperature sensor to detect and generate two nonequivalent values of the first electric parameter and the second electric parameter at a certain moment; transmitting the values of the two nonequivalent electric parameters detected at the moment to an electrical signal measuring device; and calculating a function value at this moment by a data fusing device according to a predetermined function which includes at least the said first electric parameter and the said second electric parameter; then comparing the obtained function value with a predetermined value; determining whether a fire alarming signal is to be emitted according to the compared result; if required, activating the fire alarming device. Also using two temperature sensors to detect and generate two nonequivalent values of the first electric parameter and the second electric parameter respectively is available. And detecting successively two nonequivalent values of the first electric parameter and the second electric parameter at two different moments is also available.
摘要:
A system and a method of data fusion fire alarm, wherein at least one line type temperature sensing element is used to detect and produce values of at least two nonequivalent electric parameters, namely, a first electric parameter a and a second electric parameter b at a certain time; the values of the two nonequivalent electric parameters are transmitted to an electric signal measuring device, and are used to obtain a function value at the time by a data fusion device according to a predetermined function having at least the first electric parameter and the second electric parameter, then the obtained function value is compared with a predetermined value; whether to send out a fire alarm signal is judged according to the comparative result, and starting a fire alarm device if necessary. Another technical solution may use two line type temperature sensing element, which detect and produce two nonequivalent electric parameters, namely a first electric parameter and a second electric parameter respectively. Also, two types of nonequivalent electric parameters at two different times may be detected sequentially.
摘要:
The present invention relates to an alternate foam storage and proportionally mixing device, comprising at least one normal pressure foam storage tank (12), at least two pressure foam tanks (1,1a) at least one proportional mixer (2) and a control unit, wherein the foam storage tank (12) is used to store foam liquid and alternatively output the foam liquid to the at least two pressure foam tanks (1,1a), and the at least two pressure foam tanks (1,1a) alternatively output the foam liquid to the at least one proportional mixer (2), and the at least one proportional mixer (2) outputs mixed foam liquid. The alternate foam storage and proportionally mixing device has the advantages of accurately mixing foam liquid, simple structure, and rubber diaphragm that tends not to be broken. As a major component of the present invention, the pressure foam tank (1,1a) may be produced in a standard manner, thereby greatly reducing production cycle and cost.
摘要:
A kind of analog linetype constant temp fire detecting cable,which includes a pair of detecting conductors, NTC characteristic obstructive layer, and insulated meltable layer. Said a pair of detecting conductors are parallel each other, said NTC characteristic obstructive layer and said insulated meltable layer are deposited between said a pair of detecting conductors, and the melting temperature range of said insulated meltable layer is 20°C-40°C.The invention can improve the working reliability of the analog linetype constant temp detector and increase its effective length.
摘要:
The present invention relates to an unrecoverable line-type temperature sensitive detector having short-circuit fault alarm function, comprises a detecting cable comprising at least two detecting conductors disposed in parallel and a fusible insulation layer, a resistor, and a resistance signal measuring device, wherein the detecting cable further comprises a semiconductor layer, and wherein the semiconductor layer and the fusible insulation layer are disposed between the detecting conductors so as to space the detecting conductors apart. The detector of the present invention may distinguish short-circuit fault from short circuit caused by fire, and thus overcome the disadvantage of not distinguishing short-circuit fault from short-circuit due to fire in the conventional detector. Therefore, the problem of lack of short-circuit fault alarm function in the prior art is resolved. Accordingly, the present invention improves the reliability of unrecoverable line-type temperature sensitive detector.
摘要:
The present invention relates to an analog line-type temperature sensitive detection cable including two detection conductors arranged in parallel. A NTC characteristic obstructive layer and a fusible insulation layer are provided between the two detection conductors arranged in parallel, characterized in that a intermittent conductive layer is provided between the NTC characteristic obstructive layer and the fusible insulation layer along longitudinal direction of the fire detection cable, wherein at least one of the two detection conductors is an elastic conductor. The invention overcomes the defects of the inaccurate alarm temperature caused by insufficient conductiveness of the two detection conductors while the analog line-type temperature sensitive detector having a fusible insulation layer in the prior art is heated.