CN203811295U - Optical fiber temperature alarm threshold value actuator based on shape memory alloy - Google Patents
Optical fiber temperature alarm threshold value actuator based on shape memory alloy Download PDFInfo
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- CN203811295U CN203811295U CN201420259490.2U CN201420259490U CN203811295U CN 203811295 U CN203811295 U CN 203811295U CN 201420259490 U CN201420259490 U CN 201420259490U CN 203811295 U CN203811295 U CN 203811295U
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Abstract
The utility model relates to an optical fiber temperature alarm threshold value actuator based on a shape memory alloy. Two metal arms are symmetrically disposed in the actuator, and the middle part of each of the metal arms is protruded to form an included angle. Two ends of each of the metal arms are respectively connected with two supporting springs, which are in a symmetrical arrangement, and the two supporting springs are fixedly connected with the upper ends of the protrusions of the metal arms. The outer side of the actuator is provided with a metal housing, a bottom part of which is provided with a plurality of small holes. The light transmission optical fibers are disposed under the metal arms, and pass through the metal housing disposed on the outer side of the actuator, and are fixedly connected with the ends of the metal arms by fasteners. The optical fiber temperature alarm threshold value actuator is advantageous in that the actuator can be used in the inflammable and explosive environment, the environment full of electromagnetic interferences and outdoor lightning strokes, and other severe environments; the sensing function and the actuating function are integrated into one body, and the quasi-distributed optical fiber temperature monitoring alarming function can be provided.
Description
Technical field
The utility model relates to a kind of fiber optic temperature alarm threshold value actuator based on marmem, belongs to optical fiber sensing monitoring technical field.
Background technology
Temperature is a very important physical quantity, because it directly affects the physics and chemistry processes such as burning, blast, chemical reaction, fermentation, baking, calcining, distillation, concentration, extrusion molding, crystallization and Air Flow.Temperature is controlled error just may cause the series of problems such as people's social production, social life safety and product yield.As in industrial processes, many times all need temperature to carry out strict monitoring, so that produce, can carry out smoothly, the quality of product can be guaranteed fully; In tunnel, oil field, shopping mall, more need temperature variation strictly to monitor, to avoid the generation of fire, explosion accident, to ensure people's social activities safety.Therefore, to the real time on-line monitoring of temperature and warning, be a kind of widely used security monitoring and precautionary technology, human society production, activity are had to important guaranteeing role.
At present, thermometric method is varied, but to special application scenario and special application requirements, thermometric that need to be based on different away from, develop different temperature monitoring technology, need to study concrete thermometry in conjunction with the requirement of measurand.Wherein to the Real-Time Monitoring of temperature in electromagnetism/radio frequency environment, inflammable and explosive, perishable and field extreme environment and in real time Threshold Alerts with regard to representative Research Significance, traditional sensing technology and temp measuring method (as thermopair, thermal resistance etc.) are difficult to meet multiple special application requirements, optical fiber sensing monitoring technology is arisen at the historic moment, utilize the explosion-resistance characteristic of optical fiber, be suitable for the temperature monitoring of the dangerous goods such as inflammable, explosive; Utilize optical fiber to electrical isolation, be suitable for high voltage occasion temperature detection; Utilize optical fiber without electromagnetic induction, be suitable for the temperature detection under strong-electromagnetic field interference environment, utilize the chemical stability of optical fiber, be suitable for the temperature detection of environmental protection, medicine, field of food industry; The time domain conversion property of utilizing optical fiber, is suitable for multiple spot districution temperature and measures.
To sum up analyze, it is the technology of a concrete application development of combination that temperature monitoring is reported to the police, wherein the exploitation of optical fiber temperature monitoring alarm technique and application can meet the requirement of multiple application circumstances, in conjunction with concrete special application, developing the key core technology that innovative optical fiber temperature monitoring alarm sensor and actuator are this fields, is the active demand of temperature monitoring technical field of security and protection.
Summary of the invention
The purpose of this utility model is for existing conventional temperature monitoring technology (as thermopair, thermal resistance, thermistor) be difficult to meet electromagnetism/radio frequency environment, inflammable and explosive, the Real-Time Monitoring of temperature and the technical deficiency of Threshold Alerts in real time in perishable and field extreme environment, the technical advantage of reporting to the police in conjunction with optical fiber temperature monitoring, SME based on Ni-Ti-Cu alloy (being its temperature characterisitic), a kind of temperature threshold actuator for fiber optic temperature warning system is provided, can be widely used in the chemical industry such as Kuang Shan ﹑ You Tian ﹑, airport, highway, intelligent building, etc. distributed or quasi-distributed temperature monitoring and warning in large-scale critical facility.
The utility model is to realize like this above-mentioned purpose:
A fiber optic temperature alarm threshold value actuator based on marmem, arranges symmetry in this actuator and establishes
Be equipped with two metal arms, metal arm intermediate projections forms angle, and the two ends of metal arm are connected with respectively two symmetrical support springs, and two springs are fixedly connected with in the upper end of metal arm projection; Actuator is outside equipped with metal shell, and metal shell bottom is provided with a plurality of apertures; Optic transmission fiber is arranged under metal arm, and through the metal shell outside actuator, the end of Optic transmission fiber and metal arm is fixed through fixture.
Described Optic transmission fiber is arranged under metal arm, and through the metal shell outside actuator, the end of Optic transmission fiber and metal arm is fixed through fixed sturcture.(marmem is Ni-Ti-Cu marmem under described Optic transmission fiber, to be also provided with marmem, for driving element, the core of actuator), Ni-Ti-Cu marmem is fixed by supporting construction, for preventing that Optic transmission fiber from bending under the effect of other interference (as gravity, vibration etc.).Optic transmission fiber is fixed in actuator, in critical bends state (bending loss coefficient is very little).
When ambient temperature is during lower than alarm threshold value temperature, memorial alloy keep low-temperature phase shape or shrink very little, as shown in Fig. 1; When temperature raises, memorial alloy is to high-temperature phase-transitional, shrinks and makes fibre-optical bending, and actuator is in state as shown in Figure 2.Thereby make in actuator Optic transmission fiber crooked, variation that can on-line monitoring fibre loss coefficient by light time threshold reflection technology.If temperature increases while surpassing decision content (threshold temperature), the loss factor of monitoring optical fiber also can increase and surpass corresponding decision threshold, thereby realize temperature threshold, reports to the police.When monitor temperature reduces, memorial alloy extends, and returns to again its initial low-temperature phase state, by the SME to temperature of marmem, drives and carries out spring, makes fibre-optical bending, realizes fiber optic temperature Threshold Alerts.
Of the present utility modelly be a little:
1, utilize the feature of optical fiber, this actuator all can be applied under the rugged surroundings such as inflammable, explosive, electromagnetic interference (EMI) and field thunderbolt;
2, actuator the is integrated thermally sensitive SME of functional material Ni-Ti-Cu marmem, the function with the light transmission type fibre optic temperature sensor of sensitive temperature variation, also there is the actuator function that sensitive temperature changes, integrate sensing and carry out function;
3, this threshold value actuator can be assemblied in the location that needs emphasis monitoring along optical fiber by practical application request, has the function that accurate profile fiber temperature monitoring is reported to the police.
Accompanying drawing explanation
Fig. 1 is the low-temperature phase state of actuator while not reporting to the police.
High-temperature-phase state when Fig. 2 is actuator warning.
Fig. 3 Ni-Ti-Cu marmem.
The thermally sensitive SME of Fig. 4 Ni-Ti-Cu marmem.A wherein
sfor changing, austenite starts temperature; A
ffor austenite changes finishing temperature; M
sfor Ms (martensite start) point; M
ffor martensite transfor mation finishing temperature.
The accurate profile fiber temperature monitoring of Fig. 5 based on light time threshold reflection technology reported to the police.
Embodiment
embodiment 1
A fiber optic temperature alarm threshold value actuator based on marmem, is characterized in that: this actuator
1 interior setting is symmetrically arranged with two metal arms 2, and metal arm 2 intermediate projections form angle, and the two ends of metal arm 2 are connected with respectively two symmetrical support spring 3, two springs and are fixedly connected with in the upper end of metal arm 2 projections; Actuator 1 is outside equipped with metal shell 4, and metal shell 4 bottoms are provided with a plurality of apertures 5; Optic transmission fiber 6 is arranged at metal arm 2 times, and through the metal shell 4 outside actuator 1, Optic transmission fiber 6 is fixing through fixture 9 with the end of metal arm 2.
Described Optic transmission fiber 6 is arranged with marmem 7, and marmem 7 is fixed by supporting construction 8.
As shown in Figure 2, Execution driven element-Ni-Ti-Cu marmem is to responsive to temperature, the state with low-temperature phase (martensite state) and two kinds of phase co-conversions of high-temperature-phase (Ovshinsky figure), there is SME, can stretch to responsive to temperature, when monitoring of environmental temperature is in normal condition or when lower, memorial alloy keeps low-temperature phase martensite state, when temperature raises, to high-temperature-phase Ovshinsky figure, change, under the effect of restoring force, shrink and make fibre-optical bending, thereby the bending loss coefficient of optical fiber is increased gradually, while surpassing threshold value, occurrence temperature is reported to the police.
Referring to Fig. 3, described temperature alarming or quasi-distributed temperature alarming can be realized by light time threshold reflection technology, Fig. 3 is the fiber optic temperature Threshold Alerts system based on light time threshold reflection technology, can detect in real time the reflective light intensity of fitting temperature threshold value actuator place optical fiber, thereby the variation of this section of fibre loss coefficient of Real-Time Monitoring, when temperature threshold actuator ambient temperature changes, marmem is flexible under the effect of restoring force, thereby cause the variation of fibre loss coefficient, by the variation of fibre loss coefficient monitor temperature, when also can increasing, the loss factor of optical fiber surpasses corresponding decision threshold, be that real-time implementation temperature threshold is reported to the police.
Claims (3)
1. the fiber optic temperature alarm threshold value actuator based on marmem, it is characterized in that: in this actuator (1), be symmetrically arranged with two metal arms (2), metal arm (2) intermediate projections forms angle, the two ends of metal arm (2) are connected with respectively two symmetrical support springs (3), and two springs are fixedly connected with in the upper end of metal arm (2) projection; Actuator (1) is outside equipped with metal shell (4), and metal shell (4) bottom is provided with a plurality of apertures (5); Optic transmission fiber (6) is arranged under metal arm (2), and through the outer metal shell (4) of actuator (1), Optic transmission fiber (6) is fixing through fixture (9) with the end of metal arm (2).
2. the fiber optic temperature alarm threshold value actuator based on marmem according to claim 1, is characterized in that: Optic transmission fiber (6) is arranged with marmem (7), and marmem (7) is fixing by supporting construction (8).
3. the fiber optic temperature alarm threshold value actuator based on marmem according to claim 2, is characterized in that: described marmem (7) is Ni-Ti-Cu alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420259490.2U CN203811295U (en) | 2014-05-21 | 2014-05-21 | Optical fiber temperature alarm threshold value actuator based on shape memory alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420259490.2U CN203811295U (en) | 2014-05-21 | 2014-05-21 | Optical fiber temperature alarm threshold value actuator based on shape memory alloy |
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| CN203811295U true CN203811295U (en) | 2014-09-03 |
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| CN201420259490.2U Expired - Fee Related CN203811295U (en) | 2014-05-21 | 2014-05-21 | Optical fiber temperature alarm threshold value actuator based on shape memory alloy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588662A (en) * | 2016-01-29 | 2016-05-18 | 国网山东省电力公司青岛供电公司 | Temperature threshold execution device and temperature monitoring system |
| CN109764975A (en) * | 2019-01-14 | 2019-05-17 | 昆明理工大学 | A kind of clipping Fiber Bragg Grating Temperature sensor and its application method |
| CN109990912A (en) * | 2019-05-22 | 2019-07-09 | 上海应用技术大学 | A kind of temperature-detecting device |
| CN115656773A (en) * | 2022-10-24 | 2023-01-31 | 三壹联光智能装备(深圳)有限公司 | High-temperature dynamic chip testing precision device |
| CN115711643A (en) * | 2022-10-27 | 2023-02-24 | 广州清迈电子有限公司 | Environment monitoring instrument |
-
2014
- 2014-05-21 CN CN201420259490.2U patent/CN203811295U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588662A (en) * | 2016-01-29 | 2016-05-18 | 国网山东省电力公司青岛供电公司 | Temperature threshold execution device and temperature monitoring system |
| CN105588662B (en) * | 2016-01-29 | 2019-06-04 | 国网山东省电力公司青岛供电公司 | A kind of temperature threshold executive device and temperature monitoring system |
| CN109764975A (en) * | 2019-01-14 | 2019-05-17 | 昆明理工大学 | A kind of clipping Fiber Bragg Grating Temperature sensor and its application method |
| CN109990912A (en) * | 2019-05-22 | 2019-07-09 | 上海应用技术大学 | A kind of temperature-detecting device |
| CN115656773A (en) * | 2022-10-24 | 2023-01-31 | 三壹联光智能装备(深圳)有限公司 | High-temperature dynamic chip testing precision device |
| CN115711643A (en) * | 2022-10-27 | 2023-02-24 | 广州清迈电子有限公司 | Environment monitoring instrument |
| CN115711643B (en) * | 2022-10-27 | 2023-10-31 | 广州清迈电子有限公司 | Environment monitoring instrument |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20150521 |
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| EXPY | Termination of patent right or utility model |