CN100495456C - An alarm method for a linear temperature-sensitive fire detector with dual constant temperature alarm thresholds - Google Patents

An alarm method for a linear temperature-sensitive fire detector with dual constant temperature alarm thresholds Download PDF

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CN100495456C
CN100495456C CNB2007100583931A CN200710058393A CN100495456C CN 100495456 C CN100495456 C CN 100495456C CN B2007100583931 A CNB2007100583931 A CN B2007100583931A CN 200710058393 A CN200710058393 A CN 200710058393A CN 100495456 C CN100495456 C CN 100495456C
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alarm
sensing element
temperature sensing
linear
linear temperature
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CN101101694A (en
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张卫社
李刚进
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Sureland Industry Fire-Fighting Co., Ltd.
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SURELAND INDUSTRY FIRE-FIGHTING Co Ltd
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Abstract

This method includes the following steps. (1) The conversion box (CB) real time tests the electrical parameter between the two testing conducts of the line-type temperature sensor (LTS) and judges if the circuit broken down. (2) If it does not, CB tests the resistance value (RV) of LTS and (3) sends fire alarm signal (FAS) when RV exceeds the preset normal temperature alarm threshold value. (4) If the judging result discovers line broken, CB immediately sends the false alarm signal and tests RV of LTS. (5) When RV exceeds the preset circuit-broken temperature alarm threshold value, CB sends FAS. This method raises he alarm reliability and sensitivity of the fire detector.

Description

A kind of alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values
Technical field
The present invention relates to a kind of alarm method that is used for line-type heat detector, particularly relate to a kind of alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values.
Background technology
Line-type heat detector with NTC (negative temperature coefficient) characteristic commonly used at present is a kind of broad-spectrum fire detector, it is mainly by the linear temperature sensor with NTC characteristic, be connected an end of linear temperature sensor, can be in real time the temperature or the warning electrical quantity (or sampled value) of linear temperature sensor be detected, and send the boxcar of fire alarm signal and be connected the other end of linear temperature sensor, and the terminal resistance that linear temperature sensor works the supervision effect of opening circuit is constituted according to the size of temperature or warning electrical quantity (or sampled value).Fig. 1 is linear temperature sensor transverse sectional view in the line-type heat detector with NTC characteristic of prior art.As shown in Figure 1, the linear temperature sensor of this prior art comprises two parallel detecting conductors that are provided with 1,2 and the parallel NTC characteristic barrier layer 3 that is arranged between the detecting conductor 1,2.Fig. 2 is the line-type heat detector schematic equivalent circuit with NTC characteristic of prior art.Horizontal line 1 expression detecting conductor 1 among the figure, horizontal line 2 expression detecting conductors 2, variable resistor R represents NTC characteristic barrier layer 3, R1 represents that terminal resistance 4,5 then represents boxcar.The alarm method of the line-type heat detector with NTC (negative temperature coefficient) characteristic of this prior art is: boxcar detects the temperature or the warning electrical quantity (or sampled value) of linear temperature sensor in real time, when linear temperature sensor raises because of the temperature of being heated, be positioned at two detecting conductors 1 on it, the resistance value R of the NTC characteristic barrier layer 3 between 2 will diminish, boxcar 5 can detect this variation immediately, in case boxcar 5 detects detecting conductor 1, sampled value between 2 (being electrical quantity) reaches the constant temperature alarming threshold value Fb (this value is corresponding to constant temperature alarm temperature Tb) that detector is set, and it will send fire alarm signal immediately.Under normal circumstances, if linear temperature sensor opens circuit or coming off appears in terminal resistance 4, boxcar 5 will send failure alarm signal immediately.But, there is following point in the alarm method of the line-type heat detector with NTC characteristic of this prior art: though when linear temperature sensor open circuit or terminal resistance 4 when occurring coming off boxcar 5 can send failure alarm signal, but under open circuit situation appears in linear temperature sensor, in case breaking out of fire, this moment, whether detector still determined whether to send fire alarm signal above the constant temperature alarming threshold value Fb that sets under the original non-open circuit situation according to the sampled value of linear temperature sensor, the heating temperature Tdb that will occur linear temperature sensor like this surpasses the situation of just reporting a fire behind the constant temperature alarm temperature Tb (be Tdb〉Tb), thereby greatly reduces the warning reliability and the sensitivity of detector.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of alarm method of line-type heat detector that is used to have two constant temperature alarming threshold values that can improve warning reliability and sensitivity.
In order to achieve the above object, the line-type heat detector with two constant temperature alarming threshold values that alarm method adopted that is used to have the line-type heat detector of two constant temperature alarming threshold values provided by the invention comprises linear temperature sensor, be connected an end of linear temperature sensor, can be in real time the temperature or the warning electrical quantity of linear temperature sensor be detected, and send the boxcar of fire alarm signal and be connected the other end of linear temperature sensor, and linear temperature sensor is worked the terminal resistance of the supervision effect of opening circuit according to the size of temperature or warning electrical quantity; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and the parallel NTC characteristic barrier layer that is arranged between the detecting conductor; The described alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values comprises the following step that carries out in order:
1) boxcar detects the electrical quantity between two detecting conductors in the linear temperature sensor in real time, and judges whether linear temperature sensor open circuit fault occurs;
2) open circuit fault do not occur if judged result is a linear temperature sensor, boxcar will detect the resistance value of linear temperature sensor, and send the fire alarm signal when normal constant temperature alarming threshold value Fb that this resistance value surpass to be set;
3) if judged result is a linear temperature sensor open circuit fault appears, boxcar sends failure alarm signal immediately, detect the resistance value of linear temperature sensor simultaneously, and send the fire alarm signal during constant temperature alarming threshold value Fdb when this resistance value opening circuit of surpass setting.
The line-type heat detector with two constant temperature alarming threshold values that alarm method adopted that is used to have the line-type heat detector of two constant temperature alarming threshold values provided by the invention comprises linear temperature sensor, is connected an end of linear temperature sensor, the boxcar that can be in real time the temperature or the warning electrical quantity of linear temperature sensor be detected and be connected the linear temperature sensor other end, and linear temperature sensor is worked the terminal resistance of the supervision effect of opening circuit; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and parallel NTC characteristic barrier layer and the fused insulating layers that are arranged between the detecting conductor, and in the detecting conductor at least one be elastic conductor or memory alloy wire; The described alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values comprises the following step that carries out in order:
1) boxcar detects the electrical quantity between two detecting conductors in the linear temperature sensor in real time, and judges whether linear temperature sensor open circuit fault occurs;
2) open circuit fault do not occur if judged result is a linear temperature sensor, boxcar will detect the resistance value of linear temperature sensor, and send the fire alarm signal when normal constant temperature alarming threshold value Fb that this resistance value surpass to be set;
3) if judged result is a linear temperature sensor open circuit fault appears, boxcar sends failure alarm signal immediately, detect the resistance value of linear temperature sensor simultaneously, and send the fire alarm signal during constant temperature alarming threshold value Fdb when this resistance value opening circuit of surpass setting.
The line-type heat detector with two constant temperature alarming threshold values that alarm method adopted that is used to have the line-type heat detector of two constant temperature alarming threshold values provided by the invention comprises linear temperature sensor, is connected an end of linear temperature sensor, the boxcar that can be in real time the temperature or the warning electrical quantity of linear temperature sensor be detected and be connected the linear temperature sensor other end, and linear temperature sensor is worked the terminal resistance of the supervision effect of opening circuit; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and the parallel elastic insulating layers that are arranged on the NTC characteristic barrier layers between the detecting conductor and have window, and in the detecting conductor at least one be elastic conductor or memory alloy wire; The described alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values comprises the following step that carries out in order:
1) boxcar detects the electrical quantity between two detecting conductors in the linear temperature sensor in real time, and judges whether linear temperature sensor open circuit fault occurs;
2) open circuit fault do not occur if judged result is a linear temperature sensor, boxcar will detect the resistance value of linear temperature sensor, and send the fire alarm signal when normal constant temperature alarming threshold value Fb that this resistance value surpass to be set;
3) if judged result is a linear temperature sensor open circuit fault appears, boxcar sends failure alarm signal immediately, detect the resistance value of linear temperature sensor simultaneously, and send the fire alarm signal during constant temperature alarming threshold value Fdb when this resistance value opening circuit of surpass setting.
Described constant temperature alarming threshold value Fb and Fdb be respectively linear temperature sensor under normal and the open circuit conditions corresponding to same alarm temperature under the be heated constant temperature alarming threshold value of length of unit.
One in described two detecting conductors is thermocouple wire.
The alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values provided by the invention is to determine whether to send fire alarm signal utilizing two electrical quantitys between the detecting conductor to compare with normal constant temperature alarming threshold value under the circuit normal condition, compare and determine whether to send fire alarm signal and next two electrical quantitys between the detecting conductor and the constant temperature alarming threshold value that opens circuit of utilizing of off state occur at circuit, the constant temperature alarming threshold value is lower than normal constant temperature alarming threshold value owing to open circuit, thereby can guarantee that detector sends fire alarm signal, therefore the warning reliability and the sensitivity that can improve detector when heating temperature is near normal constant temperature alarming threshold value under open circuit conditions.
Description of drawings
Fig. 1 is linear temperature sensor transverse sectional view in the line-type heat detector with NTC characteristic of prior art.
Fig. 2 is the line-type heat detector schematic equivalent circuit with NTC characteristic of prior art.
Fig. 3 is the line-type heat detector first example structure synoptic diagram with two constant temperature alarming threshold values provided by the invention.
Fig. 4 is the line-type heat detector second example structure synoptic diagram with two constant temperature alarming threshold values provided by the invention.
Fig. 5 is line-type heat detector the 3rd example structure synoptic diagram with two constant temperature alarming threshold values provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values provided by the invention is elaborated.The parts identical with prior art adopt identical drawing reference numeral.
Embodiment 1:
As shown in Figure 3, the line-type heat detector with two constant temperature alarming threshold values that alarm method adopted that is used to have the line-type heat detector of two constant temperature alarming threshold values provided by the invention comprises linear temperature sensor, be connected an end of linear temperature sensor, can be in real time the temperature or the warning electrical quantity of linear temperature sensor be detected, and send the boxcar 5 of fire alarm signal and be connected the other end of linear temperature sensor, and linear temperature sensor is worked the terminal resistance 4 of the supervision effect of opening circuit according to the size of temperature or warning electrical quantity; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with 1,2 and the parallel NTC characteristic barrier layer 3 that is arranged between the detecting conductor 1,2.The alarm method that is used for this line-type heat detector comprises the following step that carries out in order:
1) boxcar 5 detects the electrical quantity between two detecting conductors 1,2 in the linear temperature sensor in real time, and judges whether circuit open circuit fault occurs;
2) open circuit fault do not occur if judged result is a circuit, boxcar 5 will detect the resistance value of linear temperature sensor, and send the fire alarm signal when normal constant temperature alarming threshold value Fb that this resistance value surpass to be set;
3) open circuit fault occurs if judged result is a circuit, boxcar 5 sends failure alarm signal immediately, detects the resistance value of linear temperature sensor simultaneously, and sends the fire alarm signal during constant temperature alarming threshold value Fdb when this resistance value opening circuit of surpass setting.
Described constant temperature alarming threshold value Fb and Fdb be respectively linear temperature sensor under normal and the open circuit conditions corresponding to same alarm temperature under the be heated constant temperature alarming threshold value of length of unit.
Embodiment 2:
As shown in Figure 4, the line-type heat detector with two constant temperature alarming threshold values that alarm method adopted that present embodiment provides is used to have the line-type heat detector of two constant temperature alarming threshold values comprises linear temperature sensor, is connected an end of linear temperature sensor, the boxcar 5 that can be in real time the temperature or the warning electrical quantity of linear temperature sensor be detected and be connected the linear temperature sensor other end, and linear temperature sensor is worked the terminal resistance 4 of the supervision effect of opening circuit; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with 1,2 and parallel NTC characteristic barrier layer 3 and the fused insulating layers 7 that are arranged between the detecting conductor 1,2, and in the detecting conductor 1,2 at least one be elastic conductor or memory alloy wire.The line-type heat detector with two constant temperature alarming threshold values that present embodiment provides is except that the structure of linear temperature sensor is different with a last embodiment, and other structure and the alarm method that is adopted are identical with a last embodiment.
Embodiment 3:
As shown in Figure 5, the line-type heat detector with two constant temperature alarming threshold values that alarm method adopted that present embodiment provides is used to have the line-type heat detector of two constant temperature alarming threshold values comprises linear temperature sensor, is connected an end of linear temperature sensor, the boxcar 5 that can be in real time the temperature or the warning electrical quantity of linear temperature sensor be detected and be connected the linear temperature sensor other end, and linear temperature sensor is worked the terminal resistance 4 of the supervision effect of opening circuit; Wherein linear temperature sensor comprises two parallel detecting conductors 1 that are provided with, 2 reach the parallel detecting conductor 1 that is arranged on, NTC characteristic barrier layer 3 between 2 and have the elastic insulating layer 8 of window 9, and in the detecting conductor 1,2 at least one be elastic conductor or memory alloy wire.The line-type heat detector with two constant temperature alarming threshold values that present embodiment provides is except that the structure of linear temperature sensor is different with above-mentioned two embodiment, and other structure and the alarm method that is adopted are identical with above-mentioned two embodiment.
Embodiment 4:
Present embodiment is with detecting conductor 1 on the linear temperature sensor among embodiment 1, embodiment 2 and the embodiment 3, one in 2 is adopted the thermocouple wire material to make, constitute interim thermopair with another root, thereby form the linear temperature sensor with thermocouple characteristic, other structure and the alarm method that is adopted are then identical with above-mentioned three embodiment.

Claims (5)

1、一种用于具有双定温报警阀值的线型感温火灾探测器的报警方法，所述的具有双定温报警阀值的线型感温火灾探测器包括线型温度感知元件、连接在线型温度感知元件的一端，能够实时对线型温度感知元件的温度或报警电参数进行检测，并根据温度或报警电参数的大小发出火灾报警信号的转换盒(5)及连接在线型温度感知元件的另一端，并对线型温度感知元件起断路监视作用的终端电阻(4)；其中线型温度感知元件包括两根并行设置的探测导体(1，2)和并行设置在探测导体(1，2)之间的NTC特性阻隔层(3)；其特征在于：所述的用于具有双定温报警阀值的线型感温火灾探测器的报警方法包括按顺序进行的下列步骤：1. An alarm method for a linear temperature-sensing fire detector with dual constant temperature alarm thresholds. The linear temperature-sensitive fire detector with dual constant temperature alarm thresholds includes a linear temperature sensing element connected to an online One end of the type temperature sensing element can detect the temperature or alarm electrical parameters of the linear temperature sensing element in real time, and send a fire alarm signal conversion box (5) according to the temperature or the size of the alarm electrical parameter and connect the line type temperature sensing element The other end, and the terminal resistance (4) that acts as an open circuit monitoring for the linear temperature sensing element; wherein the linear temperature sensing element includes two parallel detection conductors (1, 2) and parallel detection conductors (1, 2) 2) the NTC characteristic barrier layer (3) between; it is characterized in that: the described alarm method for the linear temperature-sensitive fire detector with double fixed temperature alarm threshold value comprises the following steps carried out in order: 1)转换盒(5)实时对线型温度感知元件中两根探测导体(1，2)之间的电参数进行检测，并判断线型温度感知元件是否出现断路故障；1) The conversion box (5) detects the electrical parameters between the two detection conductors (1, 2) in the linear temperature sensing element in real time, and judges whether the linear temperature sensing element has an open circuit fault; 2)如果判断结果是线型温度感知元件未出现断路故障，转换盒(5)将检测线型温度感知元件的电阻值，并当该电阻值超过设定的正常定温报警阀值Fb时发出火警报警信号；2) If the result of the judgment is that there is no open circuit fault in the linear temperature sensing element, the conversion box (5) will detect the resistance value of the linear temperature sensing element, and send out a fire alarm when the resistance value exceeds the set normal constant temperature alarm threshold Fb Alarm; 3)如果判断结果是线型温度感知元件出现断路故障，转换盒(5)立即发出故障报警信号，同时检测线型温度感知元件的电阻值，并当该电阻值超过设定的断路定温报警阀值Fdb时发出火警报警信号。3) If the result of the judgment is that the line-type temperature sensing element has an open circuit fault, the conversion box (5) immediately sends out a fault alarm signal, and at the same time detects the resistance value of the line-type temperature sensing element, and when the resistance value exceeds the set open circuit constant temperature alarm valve A fire alarm signal is issued when the value is Fdb. 2、一种用于具有双定温报警阀值的线型感温火灾探测器的报警方法，所述的具有双定温报警阀值的线型感温火灾探测器包括线型温度感知元件、连接在线型温度感知元件的一端，能够实时对线型温度感知元件的温度或报警电参数进行检测的转换盒(5)和连接在线型温度感知元件另一端，并对线型温度感知元件起断路监视作用的终端电阻(4)；其中线型温度感知元件包括两根并行设置的探测导体(1，2)及并行设置在探测导体(1，2)之间的NTC特性阻隔层(3)和可熔融绝缘层(7)，并且探测导体(1，2)中至少一根为弹性导体或记忆合金丝；其特征在于：所述的用于具有双定温报警阀值的线型感温火灾探测器的报警方法包括按顺序进行的下列步骤：2. An alarm method for a linear temperature-sensing fire detector with dual constant temperature alarm thresholds, the linear temperature-sensitive fire detector with dual constant temperature alarm thresholds includes a linear temperature sensing element connected to an online One end of the type temperature sensing element, the conversion box (5) capable of detecting the temperature or alarm electrical parameters of the line type temperature sensing element in real time and the other end connected to the line type temperature sensing element, and monitoring the line type temperature sensing element. The terminal resistance (4); wherein the linear temperature sensing element includes two detection conductors (1, 2) arranged in parallel and an NTC characteristic barrier layer (3) arranged in parallel between the detection conductors (1, 2) and a meltable an insulating layer (7), and at least one of the detection conductors (1, 2) is an elastic conductor or a memory alloy wire; it is characterized in that: the linear temperature-sensitive fire detector with double constant temperature alarm threshold The alarm method includes the following steps in order: 1)转换盒(5)实时对线型温度感知元件中两根探测导体(1，2)之间的电参数进行检测，并判断线型温度感知元件是否出现断路故障；1) The conversion box (5) detects the electrical parameters between the two detection conductors (1, 2) in the linear temperature sensing element in real time, and judges whether the linear temperature sensing element has an open circuit fault; 2)如果判断结果是线型温度感知元件未出现断路故障，转换盒(5)将检测线型温度感知元件的电阻值，并当该电阻值超过设定的正常定温报警阀值Fb时发出火警报警信号；2) If the result of the judgment is that there is no open circuit fault in the linear temperature sensing element, the conversion box (5) will detect the resistance value of the linear temperature sensing element, and send out a fire alarm when the resistance value exceeds the set normal constant temperature alarm threshold Fb Alarm; 3)如果判断结果是线型温度感知元件出现断路故障，转换盒(5)立即发出故障报警信号，同时检测线型温度感知元件的电阻值，并当该电阻值超过设定的断路定温报警阀值Fdb时发出火警报警信号。3) If the result of the judgment is that the line-type temperature sensing element has an open circuit fault, the conversion box (5) immediately sends out a fault alarm signal, and at the same time detects the resistance value of the line-type temperature sensing element, and when the resistance value exceeds the set open circuit constant temperature alarm valve A fire alarm signal is issued when the value is Fdb. 3、一种用于具有双定温报警阀值的线型感温火灾探测器的报警方法，所述的具有双定温报警阀值的线型感温火灾探测器包括线型温度感知元件、连接在线型温度感知元件的一端，能够实时对线型温度感知元件的温度或报警电参数进行检测的转换盒(5)和连接在线型温度感知元件另一端，并对线型温度感知元件起断路监视作用的终端电阻(4)；其中线型温度感知元件包括两根并行设置的探测导体(1，2)及并行设置在探测导体(1，2)之间的NTC特性阻隔层(3)和带有窗口(9)的弹性绝缘层(8)，并且探测导体(1，2)中至少一根为弹性导体或记忆合金丝；其特征在于：所述的用于具有双定温报警阀值的线型感温火灾探测器的报警方法包括按顺序进行的下列步骤：3. An alarm method for a linear temperature-sensing fire detector with dual constant temperature alarm thresholds, said linear temperature-sensing fire detector with dual constant temperature alarm thresholds includes a linear temperature sensing element connected to an online One end of the type temperature sensing element, the conversion box (5) capable of detecting the temperature or alarm electrical parameters of the line type temperature sensing element in real time and the other end connected to the line type temperature sensing element, and monitoring the line type temperature sensing element. The terminal resistance (4); wherein the linear temperature sensing element includes two parallel detection conductors (1, 2) and the NTC characteristic barrier layer (3) arranged in parallel between the detection conductors (1, 2) and with The elastic insulation layer (8) of the window (9), and at least one of the detection conductors (1, 2) is an elastic conductor or a memory alloy wire; it is characterized in that: the line type used for the double constant temperature alarm threshold The alarm method of the temperature-sensitive fire detector includes the following steps carried out in sequence: 1)转换盒(5)实时对线型温度感知元件中两根探测导体(1，2)之间的电参数进行检测，并判断线型温度感知元件是否出现断路故障；1) The conversion box (5) detects the electrical parameters between the two detection conductors (1, 2) in the linear temperature sensing element in real time, and judges whether the linear temperature sensing element has an open circuit fault; 2)如果判断结果是线型温度感知元件未出现断路故障，转换盒(5)将检测线型温度感知元件的电阻值，并当该电阻值超过设定的正常定温报警阀值Fb时发出火警报警信号；2) If the result of the judgment is that there is no open circuit fault in the linear temperature sensing element, the conversion box (5) will detect the resistance value of the linear temperature sensing element, and send out a fire alarm when the resistance value exceeds the set normal constant temperature alarm threshold Fb Alarm; 3)如果判断结果是线型温度感知元件出现断路故障，转换盒(5)立即发出故障报警信号，同时检测线型温度感知元件的电阻值，并当该电阻值超过设定的断路定温报警阀值Fdb时发出火警报警信号。3) If the result of the judgment is that the line-type temperature sensing element has an open circuit fault, the conversion box (5) immediately sends out a fault alarm signal, and at the same time detects the resistance value of the line-type temperature sensing element, and when the resistance value exceeds the set open circuit constant temperature alarm valve A fire alarm signal is issued when the value is Fdb. 4、根据权利要求1、2或3所述的用于具有双定温报警阀值的线型感温火灾探测器的报警方法，其特征在于：所述的定温报警阀值Fb和Fdb分别为线型温度感知元件在正常和断路情况下对应于同一报警温度下单位受热长度的定温报警阀值。4. According to claim 1, 2 or 3, the alarm method for linear temperature-sensitive fire detectors with double fixed temperature alarm thresholds is characterized in that: the fixed temperature alarm thresholds Fb and Fdb are line The type temperature sensing element corresponds to the fixed temperature alarm threshold of unit heating length under the same alarm temperature under normal and open circuit conditions. 5、根据权利要求1、2或3所述的用于具有双定温报警阀值的线型感温火灾探测器的报警方法，其特征在于：所述的两根探测导体(1，2)中的一根为热电偶丝。5. The alarm method for linear temperature-sensitive fire detectors with double fixed temperature alarm thresholds according to claim 1, 2 or 3, characterized in that: the two detection conductors (1, 2) One of them is a thermocouple wire.
CNB2007100583931A 2007-07-25 2007-07-25 An alarm method for a linear temperature-sensitive fire detector with dual constant temperature alarm thresholds Active CN100495456C (en)

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