CN104574769A - Linear temperature sensor with standby loop - Google Patents
Linear temperature sensor with standby loop Download PDFInfo
- Publication number
- CN104574769A CN104574769A CN201310509297.XA CN201310509297A CN104574769A CN 104574769 A CN104574769 A CN 104574769A CN 201310509297 A CN201310509297 A CN 201310509297A CN 104574769 A CN104574769 A CN 104574769A
- Authority
- CN
- China
- Prior art keywords
- temperature sensing
- sensing cable
- temperature
- conductors
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 239000002184 metal Substances 0.000 claims abstract description 68
- 239000004020 conductor Substances 0.000 claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
Classifications
-
- 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
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The invention provides a linear temperature sensor with a spare loop, which mainly comprises a temperature sensing cable, wherein two ends of the temperature sensing cable are respectively connected with a microcomputer modulator. The temperature sensing cable is formed by arranging a negative temperature coefficient heat-sensitive material layer between and around two metal detection conductors, and then arranging a metal shielding layer outside the negative temperature coefficient heat-sensitive material layer. A linear temp sensor with spare loop features that when the short circuit of detecting conductor occurs, and after a microcomputer modulator sends out a short-circuit failure alarm signal, the microcomputer modulator can normally monitor the temp-sensing fire detection alarm of temp-sensing cable. The advantages are that: the microcomputer modulator starts the metal shielding layer of the temperature sensing cable to be used as a spare detection loop to continuously implement temperature sensing fire detection when sending out a short circuit fault alarm signal between the detection conductors, so that the function of continuously implementing temperature sensing fire detection after a short circuit fault is added, and the safety and the reliability are higher.
Description
Technical field
The present invention relates to a kind of cable linear temperature sensing warning device, the recovered cable linear different constant temperature fire detector of monitoring fire alarm after a kind of line-type temperature sensor short circuit, can be continued.
Technical background
Cable linear temperature sensing warning device of the prior art is a kind of application heat fire detector widely.Cable linear temperature sensing warning device comprises microcomputer modulator, temperature sensing cable, terminal resistance composition.Temperature sensing cable is provided with negative temperature coefficient thermistor composition layer 30 by between two metal detection conductors 10,20, is provided with two metal detection conductors 10 of negative temperature coefficient thermistor composition layer 30,20 and is strandedly set together, then extrusion molding external sheath layer 40 together.Microcomputer modulator 50 detects the change in electric between two metal detection conductors in real time, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 30 resistance declines, resistance between two metal detection conductors 10,20 reduces, when change in electric is less than a fixing threshold values, microcomputer modulator 50 sends constant temperature alerting signal.By mechanical external force short circuit between two metal detection conductors 10,20, when microcomputer modulator 50 detects that the resistance between two metal detection conductors is less than terminal resistance, microcomputer modulator 50 sends detecting conductor short-circuit alarming signal.Because two detecting conductors 10,20 are metals, there is certain degree of hardness, be provided with two metal detection conductors 10,20 of negative temperature coefficient thermistor composition layer 30 often with stranded form processing together, very easily be short-circuited in application process, if the breaking out of fire when short circuit, cable linear temperature sensing warning device, cannot send fire alarm signal.
Summary of the invention
In order to solve the problem, the invention provides a kind of line-type temperature sensor with back-up circuit.Have the line-type temperature sensor of back-up circuit in the short circuit of generation detecting conductor, microcomputer modulator is after sending short trouble alerting signal, and the temperature-sensing fire detecting that microcomputer modulator still normally can monitor temperature sensing cable is reported to the police.
In order to achieve the above object, a kind of line-type temperature sensor with back-up circuit provided by the invention forms primarily of temperature sensing cable two ends difference connected with computer modulator.Temperature sensing cable is provided with negative temperature coefficient thermistor composition layer by between two metal detection conductors and around, arranges metal screen layer then.Microcomputer modulator detects the change in electric between two metal detection conductors of temperature sensing cable in real time, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition resistance declines, resistance between two metal detection conductors reduces, when resistance is reduced to a constant temperature alarming threshold value, microcomputer modulator sends constant temperature alerting signal.Short circuit between two metal detection conductors, when microcomputer modulator detects that the resistance between two metal detection conductors is less than a short-circuit alarming threshold values, microcomputer modulator sends detecting conductor short trouble alerting signal.After microcomputer modulator sends detecting conductor short trouble alerting signal, microcomputer modulator is switched to the change in electric between detection two metal detection conductors and metal screen layer.Microcomputer modulator detects the change in electric between two metal detection conductors of temperature sensing cable and metal screen layer in real time, when temperature sensing cable is heated, because the layer resistance of negative temperature coefficient thermistor composition declines, resistance between two metal detection conductors and metal screen layer reduces, when change in electric is greater than a fixing threshold values, microcomputer modulator sends constant temperature alerting signal.
A kind of outstanding advantages with the line-type temperature sensor of back-up circuit of the present invention is: short circuit between metal detection conductor, microcomputer modulator to send between detecting conductor while short trouble alerting signal, start the metal screen layer used temperature sensing cable routine and use, continue to implement temperature-sensing fire detecting as detection circuit for subsequent use, can continue to implement temperature-sensing fire detecting function because this increasing after short trouble, having more higher safety and reliability.
Accompanying drawing explanation
Fig. 1 is prior art schematic diagram;
Fig. 2 is a kind of line-type temperature sensor schematic diagram with back-up circuit of the present invention;
Fig. 3 is a kind of line-type temperature sensor schematic diagram with back-up circuit of the present invention.
Embodiment
Having a line-type temperature sensor for back-up circuit, embodiment 1, see Fig. 2, is be connected to form signal acquisition circuit with microcomputer modulator 5 respectively by temperature sensing cable two ends.Temperature sensing cable is provided with negative temperature coefficient thermistor composition layer 3 by between two strip metal detecting conductors 1,2 and around, two strip metal detecting conductor 1,2 parallel clearances are arranged, the coated mode of extrusion molding manufactures simultaneously, then at the outer braiding of negative temperature coefficient thermistor composition layer 3 or wrapped layer of metal screen layer 4.Microcomputer modulator 5 detects the change in electric between two strip metal detecting conductors in real time, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 3 resistance declines, resistance between two strip metal detecting conductors 1,2 reduces, when resistance is reduced to a constant temperature alarming threshold value, microcomputer modulator 5 sends constant temperature alerting signal, and the constant temperature alarming threshold value of microcomputer modulator 5 can establish multiple threshold temperature, realizes multistage constant temperature and reports to the police, when temperature sensing cable temperature heating rate is greater than 10 DEG C/min, the resistance between two metal detection conductors reduces suddenly, and microcomputer modulator 5 is greater than the alarming threshold value of the change in electric amount of the unit interval of 10 DEG C/min according to heating rate, send differential temperature alerting signal, when environment temperature gets back to normal temperature state, negative temperature coefficient thermistor composition layer 3 resistance arranged between two metal detection conductors raises, and temperature-sensitive alerting signal is eliminated, and line-type temperature sensor returns to normal monitoring duty, when two strip metal detecting conductors 1, short circuit between 2, when short circuit resistance is less than a short trouble alarming threshold value, microcomputer modulator 5 sends temperature sensing cable detecting conductor short trouble alerting signal, microcomputer modulator 5 is after sending temperature sensing cable detecting conductor short trouble alerting signal, microcomputer modulator 5 is switched to detection two strip metal detecting conductor 1, change in electric between 2 and metal screen layer 4, microcomputer modulator 5 detects two strip metal detecting conductors 1 of temperature sensing cable in real time, change in electric between 2 and metal screen layer 4, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 3 resistance declines, two strip metal detecting conductors 1, resistance between 2 and metal screen layer 4 reduces, when resistance is reduced to a constant temperature alarming threshold value, microcomputer modulator sends constant temperature alerting signal.
Embodiment 2, see Fig. 3, a kind of line-type temperature sensor with back-up circuit is connected to form signal acquisition circuit with microcomputer modulator 5 respectively by temperature sensing cable A, another temperature sensing cable B two ends.Temperature sensing cable A and another temperature sensing cable B is provided with negative temperature coefficient thermistor composition layer 3 by between two strip metal detecting conductors 1,2 and around respectively, wherein two strip metal detecting conductor 1,2 parallel clearances are arranged, the coated mode of extrusion molding manufactures simultaneously, and then temperature sensing cable A and another temperature sensing cable B twists together.Microcomputer modulator 5 detects the change in electric between temperature sensing cable A and the two strip metal detecting conductors of another temperature sensing cable B in real time, when temperature sensing cable is heated, because negative temperature coefficient thermistor composition layer 3 resistance declines, resistance between two metal detection conductors 1,2 reduces, when resistance is reduced to a constant temperature alarming threshold value, microcomputer modulator 5 sends constant temperature alerting signal, and the constant temperature alarming threshold value of microcomputer modulator 5 can establish multiple threshold temperature, realizes multistage constant temperature and reports to the police.When temperature sensing cable temperature heating rate is greater than 10 DEG C/min, the resistance between two metal detection conductors reduces suddenly, and microcomputer modulator 5 is greater than the alarming threshold value of the change in electric amount of the unit interval of 10 DEG C/min according to heating rate, send differential temperature alerting signal.When environment temperature gets back to normal temperature state, negative temperature coefficient thermistor composition layer 3 resistance of the setting between two conductors raises, and temperature-sensitive alerting signal is eliminated, and line-type temperature sensor returns to normal monitoring duty.
When the resistance of temperature sensing cable A or another temperature sensing cable B is less than a short trouble alarming threshold value, microcomputer modulator 5 sends the two strip metal detecting conductor short trouble alerting signals of temperature sensing cable A or another temperature sensing cable B, microcomputer modulator 5 is after sending two metal detection conductor short trouble alerting signals of temperature sensing cable A or another temperature sensing cable B, microcomputer modulator 5 switches to a positive pole two of short circuit temperature sensing cable metal detection conductors, there is no a metal detection conductor 1 or 2 of another temperature sensing cable of short circuit as negative pole, form heat detection measure loop, detection can be proceeded, its principle of work is identical with embodiment 1.When the resistance of temperature sensing cable A and another temperature sensing cable B is less than a short trouble alarming threshold value simultaneously, i.e. two detecting conductors of temperature sensing cable A and two detecting conductors short circuit simultaneously of another temperature sensing cable B, microcomputer modulator 5 sends the detecting conductor short trouble alerting signal of temperature sensing cable A and another temperature sensing cable B, microcomputer modulator 5 switches to a positive pole short circuit temperature sensing cable A and another temperature sensing cable B simultaneously, a negative pole, form heat detection measure loop, microcomputer modulator 5 continues to detect the metal detection conductor 1 between temperature sensing cable A and another temperature sensing cable B in real time, 2 and 1, change in electric between 2, its principle of work is identical with embodiment 1.
Described temperature sensing cable can be multiloop.The metal detection conductor of described temperature sensing cable also can be multicore.Described metal screen layer can be public pole or the alternate polarities of multicore temperature sensing cable.
Material that the present invention adopts is:
1, negative temperature coefficient thermistor composition layer: cable linear temperature sensing fire detector application routine techniques material widely.
2, detecting conductor: choose between diameter 0.1 ~ 2mm, conventional metal material.
3, resistance: resistance value is chosen between 0 ~ 100M Ω.
4, braided metal layer: diameter 0.1 ~ 0.3mm, between choosing, conventional metal material.
5, wrapped metal level: thick 0.01 ~ 0.05mm, selects between wide 5 ~ 10mm, copper metal tape, aluminum metal band.
Claims (3)
1. one kind has the line-type temperature sensor of back-up circuit, be connected to form signal acquisition circuit with microcomputer modulator (5) respectively by temperature sensing cable two ends, it is characterized in that: two strip metal detecting conductors (1) of temperature sensing cable and be provided with negative temperature coefficient thermistor composition layer (3) between (2) and metal screen layer (4), after there is open circuit between two strip metal detecting conductors (1) of temperature sensing cable and (2), microcomputer modulator (5) automatically switches to the change in electric between detection two strip metal detecting conductor (1) and (2) and metal screen layer (4), continue to carry out temperature-sensing fire detecting in real time.
2. one kind has the line-type temperature sensor of back-up circuit, be connected to form signal acquisition circuit with microcomputer modulator (5) respectively by temperature sensing cable two ends, it is characterized in that: temperature sensing cable (A), another temperature sensing cable (B) are coated respectively negative temperature coefficient thermistor composition layer (3), temperature sensing cable (A) is parallel with another temperature sensing cable (B) or twist together, and is then connected with microcomputer modulator (5); Short circuit between the two strip metal conductors (1) and (2) of temperature sensing cable (A), microcomputer modulator (5) automatically switches to the electrical signal detection loop that the two strip metal conductors (1) that detect temperature sensing cable (A) and (2) are formed as negative pole as a metal detection conductor of positive pole and another temperature sensing cable (B), proceeds temperature-sensing fire detecting;
When two strip metal detecting conductors of temperature sensing cable (A) and the two strip metal detecting conductors short circuit simultaneously of another temperature sensing cable (B), the electrical signal detection loop that the two strip metal conductors that microcomputer modulator (5) automatically switches to the two strip metal conductors and another temperature sensing cable (B) detecting temperature sensing cable (A) are formed, continues to carry out temperature-sensing fire detecting in real time.
3. it is characterized in that according to a kind of line-type temperature sensor with back-up circuit according to claim 1 or claim 2: the metal detection conductor of described temperature sensing cable can be multicore; Described metal screen layer can be public pole or the alternate polarities of multicore temperature sensing cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310509297.XA CN104574769A (en) | 2013-10-20 | 2013-10-20 | Linear temperature sensor with standby loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310509297.XA CN104574769A (en) | 2013-10-20 | 2013-10-20 | Linear temperature sensor with standby loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104574769A true CN104574769A (en) | 2015-04-29 |
Family
ID=53090719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310509297.XA Pending CN104574769A (en) | 2013-10-20 | 2013-10-20 | Linear temperature sensor with standby loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104574769A (en) |
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2013
- 2013-10-20 CN CN201310509297.XA patent/CN104574769A/en active Pending
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
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| WD01 | Invention patent application deemed withdrawn after publication |