CN106355813B - The fixed temperature of the compound adaptive environment of multi-parameter, different constant temperature line-type heat detector - Google Patents
The fixed temperature of the compound adaptive environment of multi-parameter, different constant temperature line-type heat detector Download PDFInfo
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- CN106355813B CN106355813B CN201610942441.2A CN201610942441A CN106355813B CN 106355813 B CN106355813 B CN 106355813B CN 201610942441 A CN201610942441 A CN 201610942441A CN 106355813 B CN106355813 B CN 106355813B
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- 230000003044 adaptive effect Effects 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 4
- 239000011540 sensing material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
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- 230000005856 abnormality Effects 0.000 description 2
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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Abstract
The present invention relates to the fixed temperature of the compound adaptive environment of multi-parameter, different constant temperature line-type heat detector, including temperature-sensitive cable, signal processing unit and end resistance, one end of the temperature-sensitive cable is electrically connected with end resistance, and the other end of the temperature-sensitive cable is electrically connected with the signal processing unit；The signal processing unit includes bleeder circuit, filter circuit, microprocessor, output circuit and voltage conversion circuit；The other end of the temperature-sensitive cable is electrically connected on the bleeder circuit in the signal processing unit, the output end of the bleeder circuit is electrically connected with the input terminal of the filter circuit, the output end of the filter circuit is electrically connected with the input terminal of the microprocessor, and the output end of the microprocessor is electrically connected with the input terminal of the output circuit.The present invention detects heated length by two groups of reference circuits, improves the stability and interference free performance of temperature sensing cable.
Description
Technical field
The present invention relates to fire detecting and alarm technical fields in safety engineering discipline, and in particular to a kind of multi-parameter is compound certainly
Adapt to fixed temperature, the different constant temperature line-type heat detector of environment.
Background technique
Fire detector is to detect in fire automatic alarm system to scene, the equipment for finding fire.Fire
Detector is system " sense organ ", effect be monitor environment in either with or without fire generation.Once having fire behavior, just
The feature physical quantity of fire, such as temperature, smog, gas and radiation light intensity are converted into electric signal, and acted immediately to fire
Alarm controller sends alarm signal.
The performance that response performance test and alarm under the conditions of having variation of ambient temperature in temperature sensing cable national standard are failure to actuate
Deng the performance test of the temperature-sensitive cable under different heated length, the temperature-sensitive circuit of temperature sensing cable is heated under identical heating temperature
Length is different, and the change rate of resistance is different, influences the stability of detector, and the prior art jumps material using CTR temperature and resistance rate
Material, can not temperature of the being failure to actuate environment temperature below to national standard detect；Or single reference signal is used, pass through
The ratio in single reference circuit and temperature-sensitive circuit judges temperature variations, can not be accurately positioned heated length.
Summary of the invention
In view of this, that it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of multi-parameters is compound adaptive
The fixed temperature of environment, different constant temperature line-type heat detector.By detecting to heated length, the stability of temperature sensing cable is improved
And interference free performance.
In order to achieve the above object, the present invention adopts the following technical scheme that：Fixed temperature, the difference of the compound adaptive environment of multi-parameter are fixed
Temperature linetype temperature inductor, including temperature-sensitive cable, signal processing unit and end resistance, one end and end of the temperature-sensitive cable
Resistance electrical connection, the other end of the temperature-sensitive cable are electrically connected with the signal processing unit；The signal processing unit includes
Bleeder circuit, filter circuit, microprocessor, output circuit and voltage conversion circuit；The other end of the temperature-sensitive cable is electrically connected
To the bleeder circuit in the signal processing unit, the input terminal electricity of the output end of the bleeder circuit and the filter circuit
Connection, the output end of the filter circuit is electrically connected with the input terminal of the microprocessor, the output end of the microprocessor and
The input terminal of the output circuit is electrically connected, and the voltage conversion circuit is used for as the bleeder circuit, the filter circuit, institute
State microprocessor and output circuit power supply.
Further, the temperature-sensitive cable includes first group of core, second group of core and third group core；The end electricity
Resistance includes end resistance R1, end resistance R2 and end resistance R3；
The resistance R1 is serially connected in one end connection composition temperature-sensitive circuit of first group of core；
The resistance R2 is serially connected in one end the first reference circuit of connection composition of second group of core；
The resistance R3 is serially connected in one end the second reference circuit of connection composition of the third group core.
Further, the wall of first group of core is to be made using one of PTC, NTC or CTR temperature sensing material
At；Second group of core uses, and there is temperature-change in resistance characteristic conductor to be made；The third group core is using tool
There is temperature-change in resistance characteristic conductor to be made.
Further, wherein the first reference circuit is formed by first group of core and end resistance R2 and by third group core and
The temperature-coefficient of electrical resistance that end resistance R3 forms the second reference circuit is different.
Further, first group of core and end resistance R1 form temperature-sensitive loop output signal V1；Second group of core and end
Resistance R2 is held to form the first reference loop output signal V2；Third group core and end resistance R3 form the output of the second reference circuit
Signal V3, the signal processing unit carry out signal arrangement to V1, V2, V3 by bleeder circuit and filter circuit, and arrangement
Good signal is transmitted to microprocessor.
Preferably, prestore the value of V2, V3 of different heated length in microprocessor, microprocessor by comparison V2, V3 and
The corresponding relationship of V2, V3 in microprocessor to judge the heated length L of temperature-sensitive cable, and the value of V1 and are stored in micro process
The corresponding alarm threshold value of length L that is heated in device compares, to determine whether issuing fixed warm fire alarm by output circuit；Work as V1
Value be more than or equal to and be stored in microprocessor when being heated the corresponding alarm threshold value of length L, microprocessor passes through output circuit hair
Fixed warm fire alarm out；When the value of V1 be less than be stored in microprocessor be heated length L corresponding alarm threshold value when, system is again
It detects the value of V1, V2, V3 and compares.
Further, at the T1 moment, first group of core and end resistance R1 form temperature-sensitive loop output signal V11, and second
Group core and end resistance R2 form the first reference loop output signal V21, third group core and end resistance R31 composition second
Reference loop output signal V31；
At the T2 moment, first group of core and end resistance R1 form temperature-sensitive loop output signal V12, second group of core and end
Resistance R2 is held to form the first reference loop output signal V22, it is defeated that third group core and end resistance R3 form the second reference circuit
Signal V32 out；
For the signal processing unit by bleeder circuit and filter circuit to V11, V21, V31, V12, V22, V32 carry out letter
It number arranges, and the signal put in order is transmitted to microprocessor.
Further, microprocessor passes through collected V21, and the value of V31 is Bu Tong heated in the microprocessor with storage
The value of V21, V31 of length compare, and to judge heated length, and V11 and are stored in microprocessor according to heated length
The heated corresponding temperature value of length L1 compares to determine temperature value T1 at this time；
Microprocessor passes through collected V22, the value of V32 and store in the microprocessor Bu Tong the V22 of heated length,
The value of V32 compares, and to judge heated length, and V12 and is stored in microprocessor the length L2 that is heated according to heated length
Corresponding temperature value compares to determine temperature value T2 at this time；
Microprocessor judges that rate of temperature change A, microprocessor pass through handle and calculate by calculating (T2-T1)/(t2-t1)
The rate of temperature change A come and the rate of temperature change A being stored in microprocessor compare, as the rate of temperature change A calculated
When more than or equal to the rate of temperature change A being stored in microprocessor, microprocessor issues differential temperature alarm signal by output circuit,
When the rate of temperature change A calculated is less than the rate of temperature change A being stored in microprocessor, microprocessor signals are examined again
V11, V21, V31, V12, V22 are surveyed, the value of V32 simultaneously carries out calculating comparison.
Preferably, first reference circuit, second reference circuit and the temperature-sensitive circuit three public one are general
Admittance body or public one have temperature-change in resistance characteristic conductor.
Preferably, first reference circuit and a second reference circuit public normal conductor or one public
There is temperature-change in resistance characteristic conductor.
The invention adopts the above technical scheme, and one end of the temperature-sensitive cable is electrically connected with end resistance, the temp.-sensing wire
The other end of cable is electrically connected with the signal processing unit；The resistance R1 is serially connected in one end connection group of first group of core
At temperature-sensitive circuit；The resistance R2 is serially connected in one end the first reference circuit of connection composition of second group of core；The resistance
R3 is serially connected in one end the second reference circuit of connection composition of the third group core.The present invention is by two groups of reference circuits to heated
Length is detected, and the stability and interference free performance of temperature sensing cable are improved.On the other hand by the way that multiple reference circuit is arranged,
Microprocessor prestores the reference loopback value of different heated length, to be accurately positioned heated length, and by being come instead with heated length
The method for pushing away heating temperature improves the precision and stability of detector.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is one of heat detector structural schematic diagram of the present invention；
Fig. 2 is heat detector second structural representation of the present invention；
Fig. 3 is heat detector third structural representation of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
As shown in Figure 1, the present invention provides a kind of fixed temperature of compound adaptive environment of multi-parameter, the detection of different constant temperature line type temperature-sensitive
One end of device, including temperature-sensitive cable, signal processing unit and end resistance, the temperature-sensitive cable is electrically connected with end resistance, institute
The other end for stating temperature-sensitive cable is electrically connected with the signal processing unit；The signal processing unit includes bleeder circuit, filtering
Circuit, microprocessor, output circuit and voltage conversion circuit；The other end of the temperature-sensitive cable is electrically connected to the signal processing
On bleeder circuit in unit, the output end of the bleeder circuit is electrically connected with the input terminal of the filter circuit, the filtering
The output end of circuit is electrically connected with the input terminal of the microprocessor, the output end of the microprocessor and the output circuit
Input terminal electrical connection, the voltage conversion circuit are used for as the bleeder circuit, the filter circuit, the microprocessor and institute
State output circuit power supply.
As shown in Figure 1, the temperature-sensitive cable outermost wraps up insulating protective layer 7, the temperature-sensitive cable includes first group of line
Core, second group of core and third group core；The end resistance includes end resistance R1, end resistance R2 and end resistance R3；
The resistance R1 is serially connected in one end connection composition temperature-sensitive circuit of first group of core；
The resistance R2 is serially connected in one end the first reference circuit of connection composition of second group of core；
The resistance R3 is serially connected in one end the second reference circuit of connection composition of the third group core.
As a preferred embodiment, the wall of first group of core is using PTC, NTC or CTR temperature-sensitive material
One of material is made；Second group of core uses, and there is temperature-change in resistance characteristic conductor to be made；The third
Group core uses, and there is temperature-change in resistance characteristic conductor to be made.Wherein it is made of first group of core and end resistance R2
First reference circuit and the temperature-coefficient of electrical resistance difference for being made of the second reference circuit with end resistance R3 third group core.
Working principle of the invention is as follows：Temperature-coefficient of electrical resistance (abbreviation TCR) expression resistance is when temperature changes 1 degree, resistance
The opposite variation of value；At a certain temperature T2, heated length is L, sectional area is S average resistance of the conductor with respect to room temperature T1
RT2=RT1【1+TCR*(T2-T1)】, increased resistance value TB=RT2-RT1=RT1* of the T2 temperature lower conductor with respect to room temperature T1
TCR* (T2-T1)=ρ L/S*TCR* (T2-T1), ρ are the resistivity under room temperature T1, it can be seen that under T2, length of being heated is L, cuts
Area is that the conductor of S is directly proportional with respect to the size TCR of room temperature T1 increased resistance value, that is to say, that there is temperature-change in resistance
The conductor of characteristic is directly proportional to the induction sensitivity and temperature-coefficient of electrical resistance of heated length, and the present invention is by being arranged different resistance temperature
Two groups of reference circuits of coefficient are spent, to perceive the heated length of temperature-sensitive cable, and are set according to temperature-sensitive circuit under the heated length of difference
Different alarming threshold values is determined to improve the accuracy of temperature-sensitive cable, can also be increased several groups of references on the basis of this structure and be returned
Road keeps ranging more accurate.
As shown in Figure 1, the fixed warm working principle of the present invention：It is heated in the case where environmental abnormality, first group of core 1,2 and end
Resistance R1 is held to form temperature-sensitive loop output signal V1；Second group of core 3,4 and end resistance R2 form the output of the first reference circuit
Signal V2；Third group core 5,6 and end resistance R3 form the second reference loop output signal V3, and the signal processing unit is logical
Bleeder circuit and filter circuit are crossed to V1, V2, V3 carry out signal arrangement, and the signal put in order is transmitted to microprocessor.
It should be further noted that prestored in microprocessor at a certain temperature, V2, V3's of the heated length of difference
Value, microprocessor passes through the corresponding relationship of V2, V3 in comparison V2, V3 and microprocessor, to judge the heated length of temperature-sensitive cable
L, and the value of V1 alarm threshold value corresponding with the length L that is heated is stored in microprocessor is compared, to determine whether by defeated
Circuit issues fixed warm fire alarm out.The corresponding warning level of length L that is heated is stored in microprocessor when the value of V1 is more than or equal to
When value, microprocessor issues fixed warm fire alarm by output circuit；Length of being heated is stored in microprocessor when the value of V1 is less than
When spending the corresponding alarm threshold value of L, system detects the value of V1, V2, V3 again and compares；The voltage of signal processing unit is converted
24V DC power supply is converted into bleeder circuit, filter circuit, microprocessor, the power supply of output circuit by circuit；
As shown in Figure 1, differential temperature working principle of the present invention：It is heated in the case where environmental abnormality, at a certain T1 moment, first
Group core 1,2 and end resistance R1 form temperature-sensitive loop output signal V11, second group of core 3,4 and end resistance R2 composition the
One reference loop output signal V21, third group core 5,6 and end resistance R31 form the second reference loop output signal V31；
At another T2 moment, first group of core 1,2 and end resistance R1 form temperature-sensitive loop output signal V12, and second group
Core 3,4 and end resistance R2 form the first reference loop output signal V22, third group core 5,6 and end resistance R3 composition
Second reference loop output signal V32；
For the signal processing unit by bleeder circuit and filter circuit to V11, V21, V31, V12, V22, V32 carry out letter
It number arranges, and the signal put in order is transmitted to microprocessor.
Microprocessor passes through collected V21, under the certain temperature of the value and storage of V31 in the microprocessor, difference
The value of V21, V31 of heated length compare, and to judge heated length, and V11 and are stored in micro process according to heated length
The corresponding temperature value of length L1 that is heated in device compares to determine temperature value T1 at this time；
Microprocessor passes through collected V22, under the certain temperature of the value and storage of V32 in the microprocessor, difference
The value of V22, V32 of heated length compare, and to judge heated length, and V12 and are stored in micro process according to heated length
The corresponding temperature value of length L2 that is heated in device compares to determine temperature value T2 at this time；
Microprocessor judges that rate of temperature change A, microprocessor pass through handle and calculate by calculating (T2-T1)/(t2-t1)
The rate of temperature change A come and the rate of temperature change A being stored in microprocessor compare, as the rate of temperature change A calculated
When more than or equal to the rate of temperature change A being stored in microprocessor, microprocessor issues differential temperature alarm signal by output circuit,
When the rate of temperature change A calculated is less than the rate of temperature change A being stored in microprocessor, microprocessor signals are examined again
V11, V21, V31, V12, V22 are surveyed, the value of V32 simultaneously carries out calculating comparison；
24V DC power supply is converted into bleeder circuit, filter circuit, micro process by the voltage conversion circuit of signal processing unit
Device, the power supply of output circuit；
It should be added that reference circuit and temperature-sensitive circuit have Multiple Combination mode to be not limited in figure in the present invention
The combination of 1 and following Fig. 2 and Fig. 3.
As shown in Fig. 2, as a preferred embodiment, first reference circuit, second reference circuit and
The public normal conductor of the temperature-sensitive circuit three or public one have temperature-change in resistance characteristic conductor.
As shown in figure 3, the public normal conductor or public in first reference circuit and second reference circuit
One has temperature-change in resistance characteristic conductor.
One end of the temperature-sensitive cable is electrically connected by the present invention with end resistance, the other end of the temperature-sensitive cable with it is described
Signal processing unit electrical connection；The resistance R1 is serially connected in one end connection composition temperature-sensitive circuit of first group of core；It is described
Resistance R2 is serially connected in one end the first reference circuit of connection composition of second group of core；The resistance R3 is serially connected in the third
One end the second reference circuit of connection composition of group core.The present invention detects heated length by two groups of reference circuits, mentions
The high stability and interference free performance of temperature sensing cable.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. the fixed temperature of the compound adaptive environment of multi-parameter, different constant temperature line-type heat detector, it is characterised in that：Including temp.-sensing wire
One end of cable, signal processing unit and end resistance, the temperature-sensitive cable is electrically connected with end resistance, the temperature-sensitive cable it is another
One end is electrically connected with the signal processing unit；
The signal processing unit includes bleeder circuit, filter circuit, microprocessor, output circuit and voltage conversion circuit；Institute
The other end for stating temperature-sensitive cable is electrically connected on the bleeder circuit in the signal processing unit, the output end of the bleeder circuit
It is electrically connected with the input terminal of the filter circuit, the output end of the filter circuit and the input terminal of the microprocessor are electrically connected
It connects, the output end of the microprocessor is electrically connected with the input terminal of the output circuit, and the voltage conversion circuit is used for as institute
State bleeder circuit, the filter circuit, the microprocessor and output circuit power supply；
The temperature-sensitive cable includes first group of core, second group of core and third group core；The end resistance includes end electricity
Hinder R1, end resistance R2 and end resistance R3；
The resistance R1 is serially connected in one end connection composition temperature-sensitive circuit of first group of core；
The resistance R2 is serially connected in one end the first reference circuit of connection composition of second group of core；
The resistance R3 is serially connected in one end the second reference circuit of connection composition of the third group core；
First group of core and end resistance R1 form temperature-sensitive loop output signal V1；Second group of core and end resistance R2 composition the
One reference loop output signal V2；Third group core and end resistance R3 form the second reference loop output signal V3, the letter
Number processing unit carries out signal arrangement to V1, V2, V3 by bleeder circuit and filter circuit, and the signal put in order is transmitted to micro-
Processor；
The value of V2, V3 of different heated length are prestored in microprocessor, microprocessor passes through in comparison V2, V3 and microprocessor
The corresponding relationship of V2, V3 to judge the heated length L of temperature-sensitive cable, and the value of V1 and are stored in microprocessor length of being heated
The corresponding alarm threshold value of degree L compares, to determine whether issuing fixed warm fire alarm by output circuit；When V1 value be greater than etc.
In be stored in microprocessor be heated length L corresponding alarm threshold value when, microprocessor is determined warm fire by output circuit sending and is warned
Signal；When the value of V1 be less than be stored in microprocessor be heated length L corresponding alarm threshold value when, system detect again V1, V2,
The value of V3 simultaneously compares.
2. the fixed temperature of the compound adaptive environment of multi-parameter according to claim 1, different constant temperature line-type heat detector, special
Sign is：The wall of first group of core is to be made of one of PTC, NTC or CTR temperature sensing material；Described second
Group core uses, and there is temperature-change in resistance characteristic conductor to be made；The third group core, which uses, has temperature-resistance
The conductor of rate variation characteristic is made.
3. the fixed temperature of the compound adaptive environment of multi-parameter according to claim 2, different constant temperature line-type heat detector, special
Sign is：The first reference circuit wherein formed by first group of core and end resistance R2 and by third group core and end resistance R3
The temperature-coefficient of electrical resistance for forming the second reference circuit is different.
4. the fixed temperature of the compound adaptive environment of multi-parameter according to claim 2 or 3, different constant temperature line-type heat detector,
It is characterized in that：At the T1 moment, first group of core and end resistance R1 form temperature-sensitive loop output signal V11, second group of core
The first reference loop output signal V21 is formed with end resistance R2, third group core and end resistance R31 form the second reference and return
Road output signal V31；
At the T2 moment, first group of core and end resistance R1 form temperature-sensitive loop output signal V12, second group of core and end electricity
It hinders R2 and forms the first reference loop output signal V22, third group core and end resistance R3 form the second reference circuit output letter
Number V32；
The signal processing unit is by bleeder circuit and filter circuit to V11, V21, V31, and V12, V22, it is whole that V32 carries out signal
Reason, and the signal put in order is transmitted to microprocessor.
5. the fixed temperature of the compound adaptive environment of multi-parameter according to claim 4, different constant temperature line-type heat detector, special
Sign is：Microprocessor passes through collected V21, the value of V31 and store in the microprocessor Bu Tong the V21 of heated length,
The value of V31 compares, and to judge heated length, and V11 and is stored in microprocessor the length L1 that is heated according to heated length
Corresponding temperature value compares to determine temperature value T1 at this time；
Microprocessor passes through collected V22, the value of V32 and V22, the V32 for storing length of being Bu Tong heated in the microprocessor
Value compare, to judge heated length, and according to heated length is V12 and to be stored in microprocessor heated length L2 corresponding
Temperature value compare to determine temperature value T2 at this time；
Microprocessor judges rate of temperature change A by calculating (T2-T1)/(t2-t1), and microprocessor is by calculating
Rate of temperature change A and the rate of temperature change A being stored in microprocessor compare, when the rate of temperature change A calculated is greater than
When equal to the rate of temperature change A being stored in microprocessor, microprocessor issues differential temperature alarm signal by output circuit, works as meter
When the rate of temperature change A calculated is less than the rate of temperature change A being stored in microprocessor, microprocessor signals detect again
The value of V11, V21, V31, V12, V22, V32 simultaneously carry out calculating comparison.
6. the fixed temperature of the compound adaptive environment of multi-parameter described according to claim 1 or 2 or 3 or 5, different constant temperature line type temperature-sensitive are visited
Survey device, it is characterised in that：First reference circuit, second reference circuit and the temperature-sensitive circuit three public one are general
Admittance body or public one have temperature-change in resistance characteristic conductor.
7. the fixed temperature of the compound adaptive environment of multi-parameter described according to claim 1 or 2 or 3 or 5, different constant temperature line type temperature-sensitive are visited
Survey device, it is characterised in that：The public normal conductor in first reference circuit and second reference circuit or public one
Root has temperature-change in resistance characteristic conductor.
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| CN101368850A (en) * | 2007-08-16 | 2009-02-18 | 侯荣琴 | Multi-temperature impedance characteristic sensing cable and temperature-sensitive detector using the same |
| CN201262774Y (en) * | 2008-05-15 | 2009-06-24 | 张陈 | Linetype heat detector for multi-loop sectional monitoring temperature-sensing electrical signal |
| CN104198076A (en) * | 2014-08-26 | 2014-12-10 | 安徽蓝德仪表有限公司 | Multifunctional linear temperature sensor |
| CN204406593U (en) * | 2015-01-20 | 2015-06-17 | 江苏中实电子有限公司 | A kind of composite linear temperature-sensing fire disaster detector |
| CN206331545U (en) * | 2016-11-01 | 2017-07-14 | 黄继洲 | Multi-parameter is combined the constant temperature of adaptive environment, different constant temperature line-type heat detector |
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| CN106355813A (en) | 2017-01-25 |
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