CN204406593U - A kind of composite linear temperature-sensing fire disaster detector - Google Patents
A kind of composite linear temperature-sensing fire disaster detector Download PDFInfo
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- CN204406593U CN204406593U CN201520040495.0U CN201520040495U CN204406593U CN 204406593 U CN204406593 U CN 204406593U CN 201520040495 U CN201520040495 U CN 201520040495U CN 204406593 U CN204406593 U CN 204406593U
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Abstract
The utility model discloses composite linear temperature-sensing fire disaster detector, its temperature sensing part comprises three parallel detection bodies arranged, by detecting, body China and foreign countries are covered with the metallic conductor of NTC elastomeric material layer, some adjacent spacing are not more than the structures such as the temperature-sensing element be connected in series of 1 meter, improve the stability of detector, reliability, especially than single multipoint mode cable linear temperature sensing fire detector, sensitivity is greatly improved.Provide the alarm method for this detector simultaneously.The composite linear temperature-sensing fire disaster detector that the utility model provides and alarm method thereof, the accurate judgement of normal condition, fire condition and malfunction can be realized, the fusion that constant temperature is reported to the police and differential temperature is reported to the police is achieved complementary by multi-data fusion, precisely realize the continuous detection of free of discontinuities, and the structure of this detector can be sensitive detect the faults such as temperature sensing part short-circuit between conductors, open circuit and temperature-sensing element come off, there is very high practicality, be suitable for applying.
Description
Technical field
The utility model belongs to fire detecting and alarm technical field in safety engineering discipline, is specifically related to a kind of fire detector.
Background technology
At present, the cable linear temperature sensing fire detector of prior art is widely used in industrial fire field.It mainly contains switching value cable linear temperature sensing fire detector, analog quantity cable linear temperature sensing fire detector, multipoint mode cable linear temperature sensing fire detector and distributed linear optical fiber heat fire detector.The said goods Problems existing in engineer applied is cannot use after switching value cable linear temperature sensing fire detector is reported to the police, analog quantity cable linear temperature sensing fire detector is subject to environment temperature and the impact of length of being heated, there is the detection blind area between 2 sensing points in multipoint mode cable linear temperature sensing fire detector, its sensitivity of distributed linear optical fiber heat fire detector is lower, and often probe unit length is 3m.
Due to the existence of the problems referred to above, greatly limit the range of application of the cable linear temperature sensing fire detector of prior art.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of composite linear temperature-sensing fire disaster detector, provide a kind of alarm method for composite linear temperature-sensing fire disaster detector on this basis, to improve the stability of detection, reliability and sensitivity, and the continuous fire detection of free of discontinuities and Multi-stage alarming can be realized.
Technical scheme: for solving the problems of the technologies described above, the composite linear temperature-sensing fire disaster detector that the utility model provides, comprises temperature sensing part, signal processing unit, terminal resistance R1 and terminal resistance R2;
Described temperature sensing part comprises three parallel detection bodies arranged: the first detection body, the second detection body and the 3rd detection body, and described first detection body comprises the first metallic conductor and some temperature-sensing elements by the series connection of this first metallic conductor; Described second detection body comprises the second metallic conductor; Described 3rd detection body comprises the 3rd metallic conductor that outside is coated with NTC elastomeric material layer; Spacing between the described temperature-sensing element of placed adjacent is not more than 1 meter;
Described signal processing unit comprises arithmetic processing apparatus, and the first electric signal measurement device be connected with arithmetic processing apparatus, the second electric signal measurement device and alarm output device;
Described first electric signal measurement device and the first test line are connected to form the first measuring circuit; Described first test line is at least comprise the test line that the first detection body and terminal resistance R1 be formed by connecting;
Described second electric signal measurement device and the second test line are connected to form the second measuring circuit; Described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are formed by connecting.
Preferably, second, third detection body of described parallel setting is second, third detection body of parallel or stranded setting.Preferably, described second test line is parallel being close to or the equidistant test line that is formed by connecting of second, third detection body stranded and terminal resistance R2.
Preferably, described second detection body is the second metallic conductor that outside is coated with NTC elastomeric material layer.
As two kinds of optional preferred versions: described first test line is by the first detection body and the test line that is in series of terminal resistance R1, described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are in series; Or described first test line is by the first detection body, the test line that is in series of terminal resistance R1 and second detection body, described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are in series.
Preferably, described first electric signal measurement device is be connected with the first test line, the first test line is carried out to the first electric signal measurement device of live signal parameter acquisition; Described second electric signal measurement device is be connected with the second test line, the second test line is carried out to the second electric signal measurement device of live signal parameter acquisition; Described arithmetic processing apparatus, for carrying out the judgement of detector duty and carrying out the arithmetic processing apparatus of fire alarm and fault alarm according to the signal parameter of first, second electric signal measurement device collection and the comparative result of predetermined threshold value.
Preferably, described temperature-sensing element comprises closed type temperature switch and thermistor Rt in parallel with it.Preferably, described closed type temperature switch is can restoration type or can not the closed type temperature switch of restoration type or Thermal Cutoffs.Preferred as another kind, described temperature-sensing element comprises Thermal Cutoffs and thermistor Rt in parallel with it; Described Thermal Cutoffs is can restoration type or can not the Thermal Cutoffs of restoration type.
As two kinds of optional preferred versions: the external insulating sheath that covers of described first detection forms the first temperature-sensitive cable; Second detection body of described parallel setting and the 3rd detection body is parallel is close to or covers insulating sheath and form the second temperature sensing cable outward after being equidistantly twisted into one; Described first temperature-sensitive cable is parallel with the second temperature-sensitive cable to be close to or to be equidistantly twisted into one; Or
Second detection body of described parallel setting is parallel with the 3rd detection body to be close to or to be equidistantly twisted into integrally, covers insulating sheath form the total cable of single temperature-sensitive with described first outside overall after detecting the parallel placement of body.
The utility model provides the alarm method for above-mentioned composite linear temperature-sensing fire disaster detector simultaneously, comprises the steps:
The step of signal parameter Real-time Collection: signal parameter collection is carried out to the first test line by the first electric signal measurement device; By the second electric signal measurement device, signal parameter collection is carried out to the second test line;
The step of calculation process: by arithmetic processing apparatus, carries out the judgement of detector duty according to the signal parameter of first, second electric signal measurement device collection and the comparative result of predetermined threshold value; Described duty comprises normal condition, fire condition and malfunction;
The step of reporting to the police: when the duty judging detector is fire condition, starts alarm output device and carries out fire alarm; When the duty of detector is malfunction, starts alarm output device and carry out fault alarm.
Preferred:
The signal parameter gathered in the step of described signal parameter Real-time Collection is the resistance value of collected circuit;
The step of described calculation process, comprising:
The determining step of normal condition: the resistance value collected when the first electric signal measurement device equals the resistance value of terminal resistance R1, and the resistance value that the second electric signal measurement device collects is when equaling the resistance value of terminal resistance R2, arithmetic processing apparatus judges that the duty of detector is normal condition;
The determining step of malfunction and fault type: the resistance value collected when the first electric signal measurement device equals preset failure data, or second resistance value that collect of electric signal measurement device when equaling preset failure data, arithmetic processing apparatus judges that the duty of detector is malfunction, and current failure type is to should the fault type of preset failure data;
The determining step of fire condition and corresponding type of alarm thereof, comprising:
The resistance value collected when the first electric signal measurement device is greater than preset alarm threshold value R1 (DW), and the resistance value that the second electric signal measurement device collects is when being less than preset alarm threshold value R2 (DW), then arithmetic processing apparatus judges that the duty of detector is fire condition, and type of alarm is that the constant temperature of constant temperature alarm threshold value T (DW) corresponding level is reported to the police; The preset alarm threshold value that the resistance value that first, second electric signal measurement device that wherein said R1 (DW) and R2 (DW) is corresponding constant temperature alarm threshold value T (DW) collects is corresponding;
When the rate of change of the resistance value that the second electric signal measurement device collects is more than or equal to rate temperature change threshold value Δ R (CW), then arithmetic processing apparatus judges that the duty of detector is fire condition, and type of alarm is that the differential temperature of this rate temperature change threshold value Δ R (CW) corresponding level is reported to the police;
In the step of described warning: when the duty judging detector is fire condition, start the fire alarm that alarm output device carries out corresponding type of alarm; When the duty of detector is malfunction, start the fault alarm that alarm output device carries out corresponding fault type.
Preferably, the temperature-sensing element in described detector comprises closed type temperature switch and thermistor Rt in parallel with it; Described constant temperature alarm threshold value T (DW) opens threshold value for described closed type temperature switch; Or
Temperature-sensing element in described detector comprises Thermal Cutoffs and thermistor Rt in parallel with it; Described constant temperature alarm threshold value T (DW) opens threshold value for described Thermal Cutoffs.
As preferred further, in the determining step of described fire condition and corresponding type of alarm thereof, comprise plural constant temperature alarm threshold value T (DW) and/or plural rate temperature change threshold value Δ R (CW);
Temperature-sensing element in described detector comprises closed type temperature switch and thermistor Rt in parallel with it, the minimum value in described plural constant temperature alarm threshold value T (DW) be described closed type temperature switch open threshold value; Or
Temperature-sensing element in described detector comprises Thermal Cutoffs and thermistor Rt in parallel with it; Minimum value in described plural constant temperature alarm threshold value T (DW) be described Thermal Cutoffs open threshold value.
Beneficial effect: the composite linear temperature-sensing fire disaster detector that the utility model provides, its temperature sensing part comprises three parallel detection bodies arranged, by detecting, body China and foreign countries are covered with the metallic conductor of NTC elastomeric material layer, some adjacent spacing are not more than the structures such as the temperature-sensing element be connected in series of 1 meter, improve the stability of detector, reliability, especially than single multipoint mode cable linear temperature sensing fire detector, sensitivity is greatly improved.
Simultaneously, this structure of temperature-sensing element be connected in series by the first metallic conductor in temperature sensing part is constructed, make electric signal measurement device not only can detect the fault of temperature sensing part short-circuit between conductors, open circuit, also can be sensitive detect the fault that temperature-sensing element comes off, more sensitive practicality.
The simultaneously composite linear temperature-sensing fire disaster detector that provides of the utility model and alarm method, the numerical value of the resistance value signal parameter that two groups of electric signal measurement devices are collected and rate of change thereof, contrast with the alarm threshold value preset and preset temperature rate of change threshold value, the fusion that this detector constant temperature is reported to the police and differential temperature is reported to the police is achieved complementary by multi-data fusion, no matter be that when having large burning things which may cause a fire disaster to occur around temperature sensing part, (length of being heated is greater than the spacing between the temperature-sensing element of adjacent series connection, at least one temperature-sensing element is had to be arranged in big fire source range), or (length of being heated is less than the spacing between the temperature-sensing element of adjacent series connection when having little burning things which may cause a fire disaster to occur around temperature sensing part, there is a temperature-sensing element or do not have temperature-sensing element to be arranged in little burning things which may cause a fire disaster scope), fire alarm can be realized exactly, achieving normal condition, on the basis of the accurate judgement of fire condition and malfunction, achieve the continuous detection of free of discontinuities accurately.
Further, the composite linear temperature-sensing fire disaster detector provided based on the utility model and alarm method, also by many groups preset alarm sets of threshold values (R1 (DW) of the multiple different constant temperature alarm threshold value T (DW) of correspondence, R2 (DW)), with presetting and detection judgement of multiple different temperatures rate of change threshold value Δ R (CW), realize multistage detection and Multi-stage alarming function.
In general, the composite linear temperature-sensing fire disaster detector that the utility model provides and alarm method thereof, there is higher stability, reliability and sensitivity, achieving normal condition, on the basis of the accurate judgement of fire condition and malfunction, the fusion that constant temperature is reported to the police and differential temperature is reported to the police is achieved complementary by multi-data fusion, achieve the continuous detection of free of discontinuities accurately, and can be sensitive detect temperature sensing part short-circuit between conductors, the faults such as open circuit and temperature-sensing element come off, also can realize multistage detection and Multi-stage alarming function further, there is very high practicality, be suitable for applying.
Accompanying drawing explanation
The structural representation of the composite linear temperature-sensing fire disaster detector that Fig. 1 provides for system embodiment 1;
Fig. 2 is the sectional structure schematic diagram of temperature sensing part in Fig. 1;
Fig. 3 is the structural representation of temperature-sensing element in system embodiment 1;
The structural representation of the composite linear temperature-sensing fire disaster detector that Fig. 4 provides for system embodiment 2;
Fig. 5 is the sectional structure schematic diagram of temperature sensing part in Fig. 4;
Fig. 6 is the structural representation of temperature-sensing element in system embodiment 2.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
system embodiment 1:as shown in Figure 1, the composite linear temperature-sensing fire disaster detector that native system embodiment 1 provides, comprises temperature sensing part, signal processing unit and terminal resistance, and described terminal resistance comprises terminal resistance R1 and terminal resistance R2.
Described temperature sensing part comprises three parallel detection bodies arranged: the first detection body, the second detection body and the 3rd detection body.As shown in Figure 2, described first detection body comprises the first metallic conductor 1 and some temperature-sensing elements 2 by the series connection of this first metallic conductor 1; Described second detection body is the second metallic conductor 3 that outside is coated with NTC elastomeric material layer 5; Described 3rd detection body comprises the 3rd metallic conductor 4 that outside is coated with NTC elastomeric material layer 5; Spacing between the described temperature-sensing element 2 of placed adjacent is not more than 1 meter; Namely arbitrary neighborhood series connection place temperature-sensing element between maximum spacing D (max)≤1 meter.
Described signal processing unit comprises arithmetic processing apparatus, and the first electric signal measurement device be connected with arithmetic processing apparatus, the second electric signal measurement device and alarm output device.
Described first electric signal measurement device is be connected with the first test line, the first test line is carried out to the first electric signal measurement device of live signal parameter acquisition; Described second electric signal measurement device is be connected with the second test line, the second test line is carried out to the second electric signal measurement device of live signal parameter acquisition.
Described arithmetic processing apparatus, for carrying out the judgement of detector duty and carrying out the arithmetic processing apparatus of fire alarm and fault alarm according to the signal parameter of first, second electric signal measurement device collection and the comparative result of predetermined threshold value.
Described first electric signal measurement device and the first test line are connected to form the first measuring circuit; Described first test line is the test line be formed by connecting by the first detection body of parallel setting, the second detection body and terminal resistance R1.Described second electric signal measurement device and the second test line are connected to form the second measuring circuit; Described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are formed by connecting.
Be specially in native system embodiment 1:
Described first test line is by the first detection body, the test line that is in series of terminal resistance R1 and second detection body, and described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are in series, that is:
The head end of described first metallic conductor is connected with the first electric signal measurement device, and end is connected with one end of terminal resistance R1; The head end of described second metallic conductor is connected with first, second electric signal measurement device, and end is connected with the other end of terminal resistance R1 and one end of terminal resistance R2; The head end of described 3rd metallic conductor is connected with the second electric signal measurement device, and end is connected with the other end of terminal resistance R2.
Described temperature-sensing element 2 comprises closed type temperature switch and thermistor Rt in parallel with it.As shown in Figure 3, temperature-sensing element 2 described in native system embodiment 1 is a closed type temperature switch thermistor Rt in parallel; Described closed type temperature switch is can the closed type temperature switch of restoration type.
In native system embodiment, two groups of electric signal measurement devices can carry out acquisition and processing to the resistance value semaphore of test line respectively, and send the data of collection to arithmetic processing apparatus, data analysis and calculating that arithmetic processing apparatus imports into two groups, normally run according to calculation process result, the judgement of fire, fault.When having fire alarm or fault alarm occurs, arithmetic processing apparatus starts alarm output device.
Described first electric signal measurement device comprises the first front end circuit, the first filtering circuit, the first amplifying circuit and the first A/D convertor circuit; The input end of this first front end circuit is connected with the first test line, and be connected with the first filtering circuit, the first amplifying circuit and the first A/D convertor circuit after the first front end circuit in turn, the output of this first A/D convertor circuit is connected with arithmetic processing apparatus.
Described second electric signal measurement device comprises the second front end circuit, the second filtering circuit, the second amplifying circuit and the second A/D convertor circuit; The input end of this second front end circuit is connected with the second test line, and be connected with the second filtering circuit, the second amplifying circuit and the second A/D convertor circuit after the second front end circuit in turn, the output of this second A/D convertor circuit is connected with arithmetic processing apparatus.
Second detection body of described parallel setting and the 3rd detection body is parallel is close to or is equidistantly twisted into one, with described first detect body parallel be close to or parallel interval places after cover insulating sheath and form the total cable of single temperature-sensitive outside entirety.
Some in literary composition is one or more.Between the described temperature-sensing element of placed adjacent, spacing is not more than on the basis of 1 meter simultaneously, and the location gap between the multiple temperature-sensing elements be connected in series can be arranged flexibly according to practical situations.
system embodiment 2:substantially identical with system embodiment 1 structure, something in common is not repeated, and difference is:
As shown in Figure 4, described temperature sensing part comprises three parallel detection bodies arranged: the first detection body, the second detection body and the 3rd detection body.As shown in Figure 5, described first detection body comprises the first metallic conductor 1 and some temperature-sensing elements 2 by the series connection of this first metallic conductor 1; Described second detection body is the second metallic conductor 3 that outside is coated with NTC elastomeric material layer 5; Described 3rd detection body comprises the 3rd metallic conductor 4 that outside is coated with NTC elastomeric material layer 5; Spacing between the described temperature-sensing element 2 of placed adjacent is not more than 1 meter; Namely arbitrary neighborhood series connection place temperature-sensing element between maximum spacing D (max)≤1 meter; Described first electric signal measurement device and the first test line are connected to form the first measuring circuit; Described first test line is the test line be formed by connecting by the first detection body and terminal resistance R1.Described second electric signal measurement device and the second test line are connected to form the second measuring circuit; Described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are formed by connecting.
Be specially in native system embodiment 2:
Described first test line is by the first detection body and the test line that is in series of terminal resistance R1, and described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are in series, that is:
The head end of described first metallic conductor is connected with the first electric signal measurement device, and end is connected with one end of terminal resistance R1; The other end of described terminal resistance R1 is connected with the first electric signal measurement device; The head end of described second metallic conductor is connected with the second electric signal measurement device, and end is connected with one end of terminal resistance R2; The head end of described 3rd detection body is connected with the second electric signal measurement device, and end is connected with the other end of terminal resistance R2.The other end of wherein said terminal resistance R1 is by being connected with the first electric signal measurement device with the first the 4th metallic conductor detecting the spaced and parallel placement of body.
In native system embodiment 2, substituted for the closed type temperature switch in system embodiment 1 with Thermal Cutoffs, described temperature-sensing element comprises Thermal Cutoffs and thermistor Rt in parallel with it.As shown in Figure 6, described temperature-sensing element 2 is a Thermal Cutoffs thermistor Rt in parallel; Described Thermal Cutoffs is can the Thermal Cutoffs of restoration type.
The external insulating sheath that covers of described first detection forms the first temperature-sensitive cable, also has the 4th metallic conductor detecting the spaced and parallel placement of body with first in the first temperature-sensitive cable; Second detection body of described parallel setting and the 3rd detection body is parallel is close to or covers insulating sheath and form the second temperature sensing cable outward after being equidistantly twisted into one; Described first temperature-sensitive cable is parallel with the second temperature-sensitive cable to be close to or to be equidistantly twisted into one.
system embodiment 3:substantially identical with system embodiment 1 structure, something in common is not repeated, and difference is:
Described second detection body is the second metallic conductor, and outside does not have coated NTC elastomeric material layer.
The external insulating sheath that covers of described first detection forms the first temperature-sensitive cable
;second detection body of described parallel setting and the 3rd detection body is parallel is close to or covers insulating sheath and form the second temperature sensing cable outward after being equidistantly twisted into one; Described first temperature-sensitive cable is parallel with the second temperature-sensitive cable to be close to or to be equidistantly twisted into one.
Described closed type temperature switch is can not the closed type temperature switch of restoration type.
system embodiment 4:substantially identical with system embodiment 2 structure, something in common is not repeated, and difference is:
Described second detection body is the second metallic conductor, and outside does not have coated NTC elastomeric material layer.
Second detection body of described parallel setting is parallel with the 3rd detection body to be close to or to be equidistantly twisted into integrally, detects the spaced and parallel placement of body, then cover insulating sheath outside entirety and form the total cable of single temperature-sensitive with described first.Detect with first the 4th metallic conductor that body, second detects the spaced and parallel placement of body in addition in the total cable of described single temperature-sensitive.
Described Thermal Cutoffs is can not the Thermal Cutoffs of restoration type.
Certainly, the temperature-sensing element in above-mentioned each system embodiment, can adopt closed type temperature switch or the Thermal Cutoffs structure in parallel with thermistor to obtain according to actual needs flexibly.
mode embodiment 5:the alarm method for above-mentioned composite linear temperature-sensing fire disaster detector that this method embodiment 5 provides, comprises the steps:
The step of signal parameter Real-time Collection: signal parameter collection is carried out to the first test line by the first electric signal measurement device; By the second electric signal measurement device, signal parameter collection is carried out to the second test line; The live signal parameter gathered in this method embodiment 5 is the resistance value of collected circuit.
The step of calculation process: pass through arithmetic processing apparatus, the judgement of detector duty is carried out according to the signal parameter of first, second electric signal measurement device collection and the comparative result of predetermined threshold value, described duty comprises normal condition, fire condition and malfunction, specifically comprises:
The determining step of normal condition: the resistance value collected when the first electric signal measurement device equals the resistance value of terminal resistance R1, and the resistance value that the second electric signal measurement device collects is when equaling the resistance value of terminal resistance R2, arithmetic processing apparatus judges that the duty of detector is normal condition; Now run indicator flicker;
The determining step of malfunction and fault type: the resistance value collected when the first electric signal measurement device equals preset failure data, or second resistance value that collect of electric signal measurement device when equaling preset failure data, arithmetic processing apparatus judges that the duty of detector is malfunction, and current failure type is to should the fault type of preset failure data; Described preset failure data are that temperature sensing part is when occurring the faults such as short-circuit between conductors, open circuit or temperature-sensing element come off, first, second corresponding electric signal measurement device detects the resistance value scope determined, as 0+∞ or default equivalent/be similar to the numerical range of 0 or+∞;
The determining step of fire condition and corresponding type of alarm thereof: this method embodiment 5 comprises default constant temperature alarm threshold value T (DW), rate temperature change threshold value Δ R (CW), preset alarm threshold value R1 (DW) and preset alarm threshold value R2 (DW); The preset alarm threshold value that the resistance value that first, second electric signal measurement device that wherein R1 (DW) and R2 (DW) is corresponding constant temperature alarm threshold value T (DW) collects is corresponding; The structure of the composite linear temperature-sensing fire disaster detector used for this method, when the temperature-sensing element in detector is closed type temperature switch parallel connection thermistor Rt, described constant temperature alarm threshold value T (DW) opens threshold value for described closed type temperature switch, when the temperature of the first detection body perception reach temperature switch open threshold value time, temperature switch can be opened; When the temperature-sensing element in detector is Thermal Cutoffs parallel connection thermistor Rt, described constant temperature alarm threshold value T (DW) opens threshold value for described Thermal Cutoffs, when the temperature of the first detection body perception reach Thermal Cutoffs open threshold value time, Thermal Cutoffs can be opened;
The resistance value collected when the first electric signal measurement device is greater than preset alarm threshold value R1 (DW), and the resistance value that the second electric signal measurement device collects is when being less than preset alarm threshold value R2 (DW), then arithmetic processing apparatus judges that the duty of detector is fire condition, and type of alarm is that the constant temperature of constant temperature alarm threshold value T (DW) corresponding level is reported to the police;
When the rate of change of the resistance value that the second electric signal measurement device collects is more than or equal to rate temperature change threshold value Δ R (CW), then arithmetic processing apparatus judges that the duty of detector is fire condition, and type of alarm is that the differential temperature of this rate temperature change threshold value Δ R (CW) corresponding level is reported to the police.
The step of reporting to the police: when the duty judging detector is fire condition, starts alarm output device and carries out fire alarm, firewarning light flicker simultaneously; When the duty of detector is malfunction, starts alarm output device and carry out fault alarm; Simultaneous faults lamp glimmers.
mode embodiment 6:the alarm method for above-mentioned composite linear temperature-sensing fire disaster detector that this method embodiment 6 provides is substantially identical with embodiment of the method 5 step, and something in common is not repeated, and difference is:
In the determining step of described fire condition and corresponding type of alarm thereof, comprise plural rate temperature change threshold value Δ R (CW) and plural constant temperature alarm threshold value T (DW), and the preset alarm sets of threshold values (R1 (DW), R2 (DW)) corresponding with each constant temperature alarm threshold value T (DW) more than two;
The structure of the composite linear temperature-sensing fire disaster detector used for this method, when the temperature-sensing element in detector is the in parallel thermistor Rt of closed type temperature switch, the minimum value in described plural constant temperature alarm threshold value T (DW) be described closed type temperature switch open threshold value.When the temperature-sensing element in detector is the in parallel thermistor Rt of Thermal Cutoffs, the minimum value in described plural constant temperature alarm threshold value T (DW) be described Thermal Cutoffs open threshold value.
For the preset alarm sets of threshold values (R1 (DW) of each constant temperature alarm threshold value T (DW) and correspondence thereof, R2 (DW)), judge first one by one, the resistance value that second electric signal measurement device collects, (resistance value that namely the first electric signal measurement device collects is greater than this preset alarm threshold value R1 (DW) to the corresponding threshold value whether simultaneously reaching in this preset alarm sets of threshold values, and the resistance value that the second electric signal measurement device collects is less than this preset alarm threshold value R2 (DW)), in this way, then arithmetic processing apparatus judges the fire condition of the current duty of detector as this constant temperature alarm threshold value T (DW) corresponding level, type of alarm is that the constant temperature of this constant temperature alarm threshold value T (DW) corresponding level is reported to the police.
For each rate temperature change threshold value Δ R (CW), judge the rate of change of the resistance value that the second electric signal measurement device collects one by one, whether reach this rate temperature change threshold value Δ R (CW) (rate of change of resistance value that namely the second electric signal measurement device collects is more than or equal to rate temperature change threshold value Δ R (CW)), in this way, then arithmetic processing apparatus judges the fire condition of the current duty of detector as this rate temperature change threshold value Δ R (CW) corresponding level, type of alarm is that the differential temperature of this rate temperature change threshold value Δ R (CW) corresponding level is reported to the police.
The step of reporting to the police: when judging the fire condition of the duty of detector as this constant temperature alarm threshold value T (DW) or this rate temperature change threshold value Δ R (CW) corresponding level, start the fire alarm that alarm output device carries out this constant temperature alarm threshold value T (DW) or this rate temperature change threshold value Δ R (CW) corresponding level, firewarning light flicker simultaneously; When the duty of detector is malfunction, start the fault alarm that alarm output device carries out corresponding current failure type; Simultaneous faults lamp glimmers.
The alarm method for system embodiment 1 fire detector that embodiment 5 provides in method is example, sets forth of the present utility model
principle of workas follows:
(1): after normal power supply, the first electric signal measurement device carries out the collection of resistance value signal parameter to the first test line in real time, and the test line be equivalent to being in series by the first detection body, terminal resistance R1 and second detection body carries out real time signal aquisition; Second electric signal measurement device carries out the collection of resistance value signal parameter to the second test line in real time, and the test line be equivalent to second, third detection body and the terminal resistance R2 of parallel setting are in series carries out real time signal aquisition.Due at common air ambient temperature, the second metallic conductor and the 3rd metallic conductor line-to-line resistance that are covered with NTC elastomeric material layer are outward high resistant, parallel be close to or parallel interval place the first metallic conductor, with second, the line-to-line resistance of the 3rd metallic conductor is all similarly high resistant, therefore the resistance value collected when the first electric signal measurement device is equal to the resistance value of terminal resistance R1, and the resistance value that the second electric signal measurement device collects is when being equal to the resistance value of terminal resistance R2, arithmetic processing apparatus can judge that the duty of detector is normal condition according to this, now normal run indicator flicker.
(2) signal parameter in tested loop that: when temperature sensing part short-circuit between conductors, open circuit, temperature-sensing element come off, its first, second electric signal measurement device gathers will change.When a short circuit occurs, the resistance value gathered will close to 0, when metallic conductor open circuit and temperature-sensing element come off generation, the line resistance value gathered is by close+∞, once above-mentioned situation occurs, according to the comparative result of gathered signal parameter and preset failure data, arithmetic processing apparatus can judge that now detector is in malfunction, and make alarm output device export fault-signal, and fault alarm is carried out in trouble light flicker.
(3): around temperature sensing part, having large burning things which may cause a fire disaster to occur, (length of being namely heated is greater than the spacing between the temperature-sensing element of adjacent series connection, at least one temperature-sensing element is had to be arranged in big fire source range) time, the resistance value semaphore that first, second electric signal measurement device collects will change.
When temperature reaches threshold value T (DW1) of closed type temperature switch, temperature switch is opened.The resistance value that now the first electric signal measurement device detects is equal to the series value (change in resistance of the first test line now brought relative to more than one thermistor Rt of the series value of thermistor Rt and terminal resistance R1 or multiple thermistor Rt and terminal resistance R1, the change in resistance that the line-to-line resistance of the first metallic conductor and second, third metallic conductor brings to the first test line is very little, almost can ignore), the resistance value of the first test line that namely now the first electric signal measurement device gathers must be greater than the resistance value of terminal resistance R1.Simultaneously, the resistance value that second electric signal measurement device detects is equal to the line-to-line resistance of second, third metallic conductor and the value in parallel of termination resistance value R2, this parallel connection value will decline along with the rising of temperature, and the resistance value of the second test line that namely now the second electric signal measurement device gathers must be less than the resistance value of terminal resistance R2.According to the comparative result of gathered signal parameter and preset alarm threshold value, arithmetic processing apparatus can judge that the current duty of detector is fire condition, and export fire alarm by alarm output device, firewarning light flicker simultaneously, realizes constant temperature fire and reports to the police.
(4): when having little burning things which may cause a fire disaster to occur around temperature sensing part (length of being heated is less than the spacing between the temperature-sensing element of adjacent series connection):
1. be arranged in little burning things which may cause a fire disaster scope if any a temperature-sensing element, the principle of work of detection is consistent with above-mentioned principle of work (three), is not repeated herein.
2. as not having temperature-sensing element to be arranged in little burning things which may cause a fire disaster scope, by thermal site between the temperature-sensing element of adjacent series connection, so do not have the temperature switch of temperature-sensing element to open.But now the line-to-line resistance of outer the second metallic conductor and the 3rd metallic conductor that are covered with NTC elastomeric material layer can decline fast along with the rising of temperature, the now resistance value of the second test line that gathers of the second electric signal measurement device, be equal to the line-to-line resistance of second, third metallic conductor and the value in parallel of termination resistance value R2, this parallel connection value constantly will decline along with the rising of temperature.Once the rate of change of resistance value that the second electric signal measurement device gathers meets or exceeds default rate temperature change threshold value Δ R (CW), arithmetic processing apparatus can judge that the current duty of detector is fire condition according to this, and export fire alarm by alarm output device, firewarning light flicker simultaneously, realizes differential fire and reports to the police.
(5): when in (three), (four), alarm output device carries out fire alarm, the duty that arithmetic processing apparatus can provide Current detector is simultaneously the fire alarm of which alarm threshold value of presetting or rate temperature change threshold value corresponding level, to carry out fire detection and alarm more accurately.
(6): as preset multistage constant temperature alarm threshold value T (DW) and/or multi-step temperature rate of change threshold value Δ R (CW), for the preset alarm sets of threshold values (R1 (DW) of each constant temperature alarm threshold value T (DW) and correspondence thereof, R2 (DW)), and/or each rate temperature change threshold value Δ R (CW), arithmetic processing apparatus can judge one by one, and realizes multistage constant temperature fire according to the comparative result of gathered signal parameter and predetermined threshold value and report to the police and/or multistage differential fire warning function.
The structure structure of 1 meter is not more than by the spacing between the temperature-sensing element of adjacent series connection, and above-mentioned differential fire is reported to the police and the complementing each other of constant temperature fire warning, the composite linear temperature-sensing fire disaster detector that the utility model provides and alarm method thereof, can realize the unremitting continuous fire detection in arbitrfary point.
The utility model protection be the structure of provided composite linear temperature-sensing fire disaster detector.Above implementation column does not form restriction to the utility model, and relevant staff is in the scope not departing from the utility model technological thought, and the various change carried out and amendment, all drop in protection domain of the present utility model.
Claims (6)
1. a composite linear temperature-sensing fire disaster detector, is characterized in that: comprise temperature sensing part, signal processing unit, terminal resistance R1 and terminal resistance R2;
Described temperature sensing part comprises three parallel detection bodies arranged: the first detection body, the second detection body and the 3rd detection body, and described first detection body comprises the first metallic conductor and some temperature-sensing elements by the series connection of this first metallic conductor; Described second detection body comprises the second metallic conductor; Described 3rd detection body comprises the 3rd metallic conductor that outside is coated with NTC elastomeric material layer; Spacing between the described temperature-sensing element of placed adjacent is not more than 1 meter;
Described signal processing unit comprises arithmetic processing apparatus, and the first electric signal measurement device be connected with arithmetic processing apparatus, the second electric signal measurement device and alarm output device;
Described first electric signal measurement device and the first test line are connected to form the first measuring circuit; Described first test line is at least comprise the test line that the first detection body and terminal resistance R1 be formed by connecting;
Described second electric signal measurement device and the second test line are connected to form the second measuring circuit; Described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are formed by connecting.
2. composite linear temperature-sensing fire disaster detector according to claim 1, is characterized in that: described second detection body is the second metallic conductor that outside is coated with NTC elastomeric material layer.
3. composite linear temperature-sensing fire disaster detector according to claim 1 and 2, is characterized in that:
Described first test line is by the first detection body and the test line that is in series of terminal resistance R1, and described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are in series; Or
Described first test line is by the first detection body, the test line that is in series of terminal resistance R1 and second detection body, and described second test line is the test line that parallel second, third detection body of arranging and terminal resistance R2 are in series.
4. composite linear temperature-sensing fire disaster detector according to claim 1, is characterized in that:
Described first electric signal measurement device is be connected with the first test line, the first test line is carried out to the first electric signal measurement device of live signal parameter acquisition;
Described second electric signal measurement device is be connected with the second test line, the second test line is carried out to the second electric signal measurement device of live signal parameter acquisition;
Described arithmetic processing apparatus, for carrying out the judgement of detector duty and carrying out the arithmetic processing apparatus of fire alarm and fault alarm according to the signal parameter of first, second electric signal measurement device collection and the comparative result of predetermined threshold value.
5. composite linear temperature-sensing fire disaster detector according to claim 1, is characterized in that: described temperature-sensing element comprises closed type temperature switch and thermistor Rt in parallel with it; Described closed type temperature switch is can restoration type or can not the closed type temperature switch of restoration type; Or
Described temperature-sensing element comprises Thermal Cutoffs and thermistor Rt in parallel with it; Described Thermal Cutoffs is can restoration type or can not the Thermal Cutoffs of restoration type.
6. composite linear temperature-sensing fire disaster detector according to claim 1, is characterized in that:
The external insulating sheath that covers of described first detection forms the first temperature-sensitive cable; Second detection body of described parallel setting and the 3rd detection body is parallel is close to or covers insulating sheath and form the second temperature sensing cable outward after being equidistantly twisted into one; Described first temperature-sensitive cable is parallel with the second temperature-sensitive cable to be close to or to be equidistantly twisted into one; Or
Second detection body of described parallel setting is parallel with the 3rd detection body to be close to or to be equidistantly twisted into integrally, covers insulating sheath form the total cable of single temperature-sensitive with described first outside overall after detecting the parallel placement of body.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104574771A (en) * | 2015-01-20 | 2015-04-29 | 江苏中实电子有限公司 | Combined type linear temperature-sensing fire detector and alarm method of combined type linear temperature-sensing fire detector |
| CN106355813A (en) * | 2016-11-01 | 2017-01-25 | 黄继洲 | Multi-parameter composite adaptive-environment constant-temperature and rate-of-rise fixed temperature linear thermal detector |
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2015
- 2015-01-20 CN CN201520040495.0U patent/CN204406593U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104574771A (en) * | 2015-01-20 | 2015-04-29 | 江苏中实电子有限公司 | Combined type linear temperature-sensing fire detector and alarm method of combined type linear temperature-sensing fire detector |
| CN104574771B (en) * | 2015-01-20 | 2017-11-14 | 江苏中实电子有限公司 | A kind of composite linear temperature-sensing fire disaster detector and its alarm method |
| CN106355813A (en) * | 2016-11-01 | 2017-01-25 | 黄继洲 | Multi-parameter composite adaptive-environment constant-temperature and rate-of-rise fixed temperature linear thermal detector |
| CN106355813B (en) * | 2016-11-01 | 2018-11-23 | 黄继洲 | The fixed temperature of the compound adaptive environment of multi-parameter, different constant temperature line-type heat detector |
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