CN100495456C - Alarming method for linear temperature-sensing fire hazard detector with double fixed temperature alarming threshold value - Google Patents
Alarming method for linear temperature-sensing fire hazard detector with double fixed temperature alarming threshold value Download PDFInfo
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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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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
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, a kind of alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values, described line-type heat detector with two constant temperature alarming threshold values 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 (1,2) that are provided with and the parallel NTC characteristic barrier layer (3) that is arranged between the detecting conductor (1,2); It is characterized in that: 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 (5) detects the electrical quantity between two detecting conductors (1,2) 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 (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) if judged result is a linear temperature sensor open circuit fault appears, boxcar (5) 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.
2, a kind of alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values, described line-type heat detector with 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, 2) NTC characteristic barrier layer (3) between and fused insulating layer (7), and in the detecting conductor (1,2) at least one be elastic conductor or memory alloy wire; It is characterized in that: 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 (5) detects the electrical quantity between two detecting conductors (1,2) 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 (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) if judged result is a linear temperature sensor open circuit fault appears, boxcar (5) 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.
3, a kind of alarm method that is used to have the line-type heat detector of two constant temperature alarming threshold values, described line-type heat detector with 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, 2) the NTC characteristic barrier layer (3) between and have the elastic insulating layer (8) of window (9), and at least one is elastic conductor or memory alloy wire in the detecting conductor (1,2); It is characterized in that: 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 (5) detects the electrical quantity between two detecting conductors (1,2) 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 (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) if judged result is a linear temperature sensor open circuit fault appears, boxcar (5) 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.
4, according to claim 1, the 2 or 3 described alarm methods that are used to have the line-type heat detector of two constant temperature alarming threshold values, it is characterized in that: 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.
5, according to claim 1, the 2 or 3 described alarm methods that are used to have the line-type heat detector of two constant temperature alarming threshold values, it is characterized in that: one in described two detecting conductors (1,2) is thermocouple wire.
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| CNB2007100583931A CN100495456C (en) | 2007-07-25 | 2007-07-25 | Alarming method for linear temperature-sensing fire hazard detector with double fixed temperature alarming threshold value |
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| CN102722955A (en) * | 2012-06-14 | 2012-10-10 | 沈阳普泰安科技有限公司 | Rate-of-rise and fixed temperature fire detector with composition of device and line type temperature-induction |
| CN104732741B (en) * | 2015-01-28 | 2018-01-05 | 上海电控研究所 | A kind of detection method and device of the fire alarm system based on wire type flame sensor |
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Owner name: SHOU AN INDUSTRY FIRE LTD. Free format text: FORMER OWNER: ZHANG WEISHE; APPLICANT Effective date: 20080627 |
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Effective date of registration: 20080627 Address after: Beijing City, the Capital Airport South Industrial Zone Banbidian Road No. 22 Lee post encoding: 101304 Applicant after: Sureland Industry Fire-Fighting Co., Ltd. Address before: The construction of the road in the middle of Xiqing Yangliuqing town, Tianjin District 55 post encoding: 300380 Applicant before: Zhang Wei Co-applicant before: Li Gangjin |
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Denomination of invention: Alarming method for linear temperature-sensing fire hazard detector with double fixed temperature alarming threshold value Effective date of registration: 20121010 Granted publication date: 20090603 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |
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Date of cancellation: 20171114 Granted publication date: 20090603 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |