CN113984234A - Alarm device and twisted thermocouple wire sensor - Google Patents
Alarm device and twisted thermocouple wire sensor Download PDFInfo
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- CN113984234A CN113984234A CN202111259323.9A CN202111259323A CN113984234A CN 113984234 A CN113984234 A CN 113984234A CN 202111259323 A CN202111259323 A CN 202111259323A CN 113984234 A CN113984234 A CN 113984234A
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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
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
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Abstract
The present invention provides an alarm device and a twisted thermocouple wire sensor, the twisted thermocouple wire sensor including: the positive electrode lead comprises a positive electrode first section of lead coated with a first insulating layer and a positive electrode second section of lead not coated with the first insulating layer; the negative electrode lead comprises a negative electrode first section lead coated with a second insulating layer and a negative electrode second section lead not coated with the second insulating layer, wherein the positive electrode first section lead and the negative electrode first section lead are twisted to form a twisted section, and the positive electrode second section lead and the negative electrode second section lead are twisted to form a fixed temperature measurement working end. The invention can optimize the temperature sensor to detect and alarm the fire and combustion of the power cable of the communication machine room.
Description
Technical Field
The present invention relates to fire point detection, and more particularly, to an alarm device and a twisted thermocouple wire sensor.
Background
In a communication machine room, a large number of power cables are used, and the power cables may cause fire and burn due to short circuit and the like and also may cause fire and burn due to fire wave of external cabinet equipment; if the fire power cable is connected with a chemical energy source such as a storage battery or a capacitor, and the flame just reaches the chemical energy source, explosion is likely to be caused, and serious accidents are caused. Therefore, the detection of the ignition combustion point of the power cable of the communication machine room and the realization of alarming and disposal have great practical significance, but the ignition combustion point of the power cable has randomness, which brings great difficulty to fire detection.
Once the power cable is ignited and burnt in the existing communication machine room, detection, alarm and fire extinguishing can be carried out only by a fire extinguishing system of the machine room, and if an electrical short-circuit point is not cut off after the fire extinguishing system of the machine room acts, secondary fire or even explosion accidents are possibly caused, so that the invention provides a method and a device for realizing fire detection and alarm special for the power cable of the communication machine room.
Therefore, how to optimize the temperature sensor to detect and alarm the fire and combustion of the power cable in the communication machine room is a technical problem to be solved urgently by technical personnel in the field.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the invention and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an alarm device and a twisted thermocouple wire sensor, which overcome the difficulties in the prior art and optimize a temperature sensor so as to detect and alarm the fire of a power cable of a communication machine room.
An embodiment of the present invention provides a twisted thermocouple wire sensor, including:
the positive electrode lead comprises a positive electrode first section of lead coated with a first insulating layer and a positive electrode second section of lead not coated with the first insulating layer;
a negative electrode lead comprising a negative electrode first section of lead coated with a second insulating layer and a negative electrode second section of lead not coated with the second insulating layer,
the positive first section of lead and the negative first section of lead are twisted to form a twisted section, and the positive second section of lead and the negative second section of lead are twisted to form a fixed temperature measuring working end.
In some embodiments of the present invention, after the first insulating layer and the second insulating layer of the twisted section are melted by heating, the positive conducting wire is in contact with the negative conducting wire to form an intermediate temperature measuring working end.
In some embodiments of the present invention, the fixed temperature measuring working end is formed by welding after the positive first segment of the conducting wire and the negative first segment of the conducting wire are twisted.
In some embodiments of the present invention, the twisted thermocouple wire sensor further comprises: and the protective sleeve coats the positive electrode lead and the negative electrode lead.
In some embodiments of the present invention, the protective sheath, the first insulating layer, and the second insulating layer are polyethylene materials.
In some embodiments of the present invention, the twisted section has a twist lay length of 10mm or more and 20mm or less.
In some embodiments of the present invention, the cross-sectional diameters of the positive electrode lead and the negative electrode lead are 0.5mm or more.
According to still another aspect of the present invention, there is also provided an alarm device, including:
the twisted thermocouple wire sensor as described above, which includes an instrument connection terminal;
the input end of the temperature transmitter is connected with the instrument connecting end of the twisted thermocouple wire sensor;
and the alarm module is connected with the output end of the temperature transmitter and is configured to alarm the temperature when the temperature sensed by the twisted thermocouple wire sensor transmitted by the temperature transmitter is greater than a set threshold value.
In some embodiments of the invention, the alert module comprises: the temperature transmitter comprises a control circuit, a power supply and an alarm signal generation module, wherein the control circuit is connected to the output end of the temperature transmitter, and when the temperature signal received by the control circuit is greater than a set threshold value, the alarm signal generation module is controlled to be communicated with the power supply so as to generate an alarm signal.
In some embodiments of the present invention, the warning device is used in a communication room, and the twisted thermocouple wire sensor is closely laid along the power cable to be detected.
Compared with the prior art, the invention aims to: and optimizing the temperature sensor to detect and alarm the fire and combustion of the power cable of the communication machine room.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of one embodiment of a twisted thermocouple wire sensor of the present invention.
FIG. 2 is a schematic diagram of one embodiment of a twisted thermocouple wire sensor of the present invention forming an intermediate temperature sensing active end.
FIG. 3 is a block diagram of an embodiment of an alerting device of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
At present, a sensor commonly used for detecting temperature is a push-push thermocouple, but the thermocouple is formed into a working end (a temperature measuring probe or a hot end) by welding two wires of a bimetal anode and a bimetal cathode at the tail ends of the thermocouple, and can only detect the temperature of the welding point position and cannot carry out full-line temperature detection on a power cable. The temperature detection device is used for detecting the temperature along the whole cable, hundreds, thousands or even more thermocouples are required to be densely distributed, and the more thermocouples are distributed, the more multipath temperature transmitters are required to be added, so that the cost is high, and other problems of engineering installation, monitoring construction and the like are caused; however, if the thermocouple is not distributed densely, some points on the cable cannot be included in the detection range, so that the ignition and combustion points are omitted, and therefore, the technical scheme is not operational.
The existing sensor for detecting the fire of the power cable is a temperature measuring cable based on a thermocouple, namely a heat searching type thermocouple, can detect the highest temperature along the cable, and can be used for detecting the fire burning of the cable of a communication machine room. However, the price of the temperature measuring cable is high at present, the price of the domestic mainstream brand is about 500 yuan to 3000 yuan/m, and the price of the imported mainstream brand is about 2000 yuan to 8000 yuan/m. Based on the consideration of construction cost, the technical scheme can not be generally applied to the field of communication machine rooms at present. On the other hand, because the thermocouple temperature measuring cable forms a temporary temperature measuring working end by relying on a thermosensitive material, when the communication machine room power cable is on fire due to other equipment fires, the thermocouple temperature measuring cable is on fire instantly at the fire point and the temperature has step jump, and the thermosensitive material of the thermocouple temperature measuring cable fails due to the limitation of a working temperature interval, and finally the condition that the power cable is on fire and burns cannot be detected occurs. Based on the reliability, the technical scheme is not suitable for detection and alarm of fire and combustion in the communication machine room.
Therefore, how to provide a linear sensor which can detect the ignition and combustion, has low manufacturing difficulty, low application cost and reliability, and ensure that the technical scheme can be widely applied to the detection and alarm of the ignition and combustion of the power cable of the communication machine room is a technical problem to be solved in the present application. At present, a general computer room fire-fighting system is adopted for the communication computer room to alarm all fire-starting combustion events, on one hand, the factors triggering the alarm are many (such as air conditioner fire-starting, lamp fire-starting and the like), whether the fire-starting is related to a storage battery power cable or not cannot be confirmed, and whether the storage battery power supply needs to be cut off or not cannot be judged; on the other hand, the traditional smoke temperature sensing alarm has higher false triggering probability, people often need to be sent to a site to perform secondary confirmation, and whether the power cable of the storage battery is on fire or not can not be judged in time, so that the power supply of the storage battery can not be cut off under the command of a universal computer room fire-fighting system.
In order to accurately detect the fire and combustion events of the power cable of the communication machine room, a technical scheme of densely distributing thermocouples can be adopted, but the quantity of densely distributing the thermocouples cannot be infinite, so that detection blind spots can occur. In order to accurately detect the fire burning of the power cable of the communication machine room, the existing temperature measuring cable based on a thermocouple or the temperature measuring optical fiber based on the temperature sensitive characteristic of the optical fiber can be adopted, but the application cost of the technical schemes is too high, and the reliability of detecting the fire burning of the communication machine room is insufficient. Therefore, the twisted thermocouple wire sensor and the alarm device provided by the combined application can give an alarm in real time for the fire burning event of the power cable of the storage battery, and provide possibility for timely cutting off dangerous sources such as an electrical short-circuit point and the like.
According to the thermocouple temperature measurement principle, positive and negative leads of a thermocouple are welded together, and temperature can be measured by taking a welding point as a working end (a hot end or a temperature measurement probe); the positive and negative wires of the thermocouple with exposed metal are twisted together, and the temperature can be measured by taking the twisted contact point as a working end. The former uses a welding point as a working end, has higher temperature measurement precision and is a standard mode adopted by a common thermocouple; in the latter, the twisted contact point is taken as the working end, the temperature measurement precision is reduced, but compared with the former, the temperature measurement precision is reduced by no more than +/-5 ℃, and the precision requirement required by the fire detection of the power cable of the storage battery is not influenced. Based on the above principles, therefore, the present application provides a twisted thermocouple wire sensor.
FIG. 1 is a schematic diagram of one embodiment of a twisted thermocouple wire sensor of the present invention. FIG. 2 is a schematic diagram of one embodiment of a twisted thermocouple wire sensor of the present invention forming an intermediate temperature sensing active end.
The twisted thermocouple wire sensor 100 provided by the present application includes a positive lead 110 and a negative leadA line 120. The positive electrode lead 110 includes a positive electrode first segment 111 coated with a first insulating layer 141 and a positive electrode second segment 112 not coated with the first insulating layer 141. The negative electrode lead 120 includes a negative electrode first lead 121 coated with a second insulating layer 142 and a negative electrode second lead 122 not coated with the second insulating layer 142. The positive first section lead 111 and the negative first section lead 121 are twisted to form a twisted section 131, and the positive second section lead 112 and the negative second section lead 122 are twisted to form a fixed temperature measuring working end 132 (H). Preferably, the fixed temperature measuring working end 132 is formed by welding after the positive first-stage lead 111 and the negative first-stage lead 121 are twisted. Preferably, the twisting pitch S of the twisting section 131 is greater than or equal to 10mm and less than or equal to 20 mm. Preferably, the cross-sectional diameters of the positive electrode lead 110 and the negative electrode lead 120 are 0.5mm or more. After the first insulating layer 141 and the second insulating layer 142 of the twisted section 131 are heated and melted, the positive lead 110 is in contact with the negative lead 120 to form an intermediate temperature measuring working end (H)New). The twisted thermocouple wire sensor may further include a protective sheath (not shown) covering the positive wire 110 and the negative wire 120. In some embodiments, the protective sheath, the first insulating layer 141, and the second insulating layer 142 are polyethylene materials.
Therefore, the twisted thermocouple wire sensor 100 can be laid on the bottom of the cable in a mode of being tightly attached to the bottom of the cable, and the detection of the communication machine room power cable fire accident can be achieved by binding the twisted thermocouple wire sensor with a common electrician rolled tape. Under normal conditions, the twisted thermocouple wire sensor 100 detects the temperature through the fixed temperature measuring working end 132, and the detected ambient temperature of the sheath of the power cable contacting with the welding point is generally between 0 and 40 ℃. When the power cable is ignited and burned at any point inside or outside, the outermost protective sleeve of the twisted thermocouple wire sensor 100, the first insulating layer 141 and the second insulating layer 142 (the diameter of the wire may be 0.5mm, and the thickness of the insulating layer may be about 0.2 mm) against the ignition part are thin, and when the temperature resistance (ignition temperature) of the insulating material is exceeded, the wire will be quickly melted and shrunk, resulting in twistingThe positive and negative leads of the mold close thermocouple wires are exposed as shown in fig. 2. Because the positive and negative leads of the twisted thermocouple wire are in a twisted state, the positive and negative leads are influenced by twisting force and naturally touch together to form a new thermocouple working end HNew. Therefore, the working end of the twisted thermocouple wire is fixed under the normal working state, and a new working end H is automatically generated after a fire accident occursNewAnd replacing the original working end H.
In order to optimize the normal operation of the twisted thermocouple wire sensor, the insulating layer material, the wire diameters of the positive and negative leads, the twisting distance and the fixed working end can meet the following requirements:
the insulating layer of the twisted thermocouple wire sensor 100 is made of polyethylene. According to the operating principle that the twisted thermocouple wire sensor 100 detects a fire by forming a new temperature measuring working end, the temperature resistance of the insulating layer of the sensor is required to be low. Therefore, considering two factors of reducing the manufacturing cost and shortening the time of forming a new working end of the novel sensor, the polyethylene with the temperature resistance value of 105 ℃ can be adopted as the insulating layer material of the novel sensor.
The wire diameter of the positive and negative electrode wires of the twisted thermocouple wire sensor 100 is preferably not less than 0.5 mm. Because of communication computer lab personnel business turn over frequently, power cable exists the possibility that receives external force to disturb, if this novel sensor wire line footpath undersize, receives external force to drag easily and the fracture leads to this sensor to be in unusual operating condition, and then probably causes the rear end device to send the mistake and report an emergency and ask for help or increased vigilance. Therefore, the wire diameter of the positive and negative electrode wires can be not less than 0.5 mm.
The twisted thermocouple wire sensor 100 may have a twist lay length of 10mm or more and 20mm or less. Generally, the smaller the twisting distance, the larger the twisting pressure between the two wires of the twisted thermocouple wire, and the more easily the positive and negative touch points are formed during the fire, which is more beneficial to rapidly detecting the fire point of the cable. However, the lay length needs to take the diameters of the positive and negative leads and the bendable range of the sheath material into consideration. The too small twisting pitch has great damage to the thermocouple lead insulation, which easily causes the thermocouple lead insulation layer to break, and further causes the false alarm. Accordingly, the lay length of the twisted thermocouple wires in the present application may be 10mm or more. On the other hand, the lay length of the stranded thermocouple wire should not be too large, and the lay length is too large, which may result in too small twisting force between the positive and negative leads, which may lead to insecurity of the contact points between the positive and negative electrodes naturally formed when the thermocouple cable is burnt by external fire, and reduce the reliability of alarm. Experimental tests show that when the lay length is larger than 20mm, the time for forming a new temperature measuring working end after ignition and combustion is gradually prolonged to a minute level, and timely warning is not facilitated. Accordingly, the maximum lay length of the twisted thermocouple wires of the present application may be 20mm or less.
The fixed working end of the twisted thermocouple wire sensor 100 should be twisted and then welded. For avoiding original work end to be in abnormal operating condition because of the welding point pine takes off and leads to transposition type thermocouple wire sensor, can't detect normal temperature value, the fixed work end of transposition type thermocouple wire sensor 100 of this application can be earlier and do welding process after the positive negative pole wire that is close to fixed work end twists, improves work end contact fastness.
FIG. 3 is a block diagram of an embodiment of an alerting device of the present invention. The alarm device 200 includes a twisted thermocouple wire sensor 210, a temperature transmitter 220, and an alarm module 230. The twisted thermocouple wire sensor 210 is constructed as described above, with the twisted thermocouple wire sensor 210 including a meter connection terminal. The input of the temperature transmitter 220 is connected to the instrument connection of the twisted thermocouple wire sensor 210. An alarm module 230 is coupled to an output of the temperature transmitter 220. The alarm module 230 is configured to alarm when the temperature sensed by the twisted thermocouple wire sensor 210 transmitted by the temperature transmitter 220 is greater than a set threshold. In the embodiments of the present application, the "connection" may refer to a wired connection and a wireless connection, so that an electrical connection, a communication connection, and the like are achieved. Further, the alarm module 230 may include a control circuit, a power supply, and an alarm signal generation module. The control circuit is connected to the output end of the temperature transmitter 220, and when the temperature signal received by the control circuit is greater than a set threshold value, the control circuit controls the alarm signal generation module to be communicated with the power supply so as to generate an alarm signal.
Specifically, the alarm device 200 may be used for detecting and alarming the fire and burning of the power cable in the communication room. Under normal conditions, a twisted thermocouple wire sensor 210 clinging to a power cable of a communication machine room measures a temperature value between 0 and 40 ℃ through an original fixed working end (working end or hot end); when the fire combustion occurs, the flame temperature is measured by the sensor to be far more than 100 ℃ through the formed new working end. From a normal operating state to a fire combustion operating state, the temperature value measured by the sensor jumps, and the output value of the temperature transmitter 220 connected to the sensor jumps.
In some embodiments, to ensure that no fire accident is missed, it can be considered that when the temperature detected by the sensor exceeds 100 ℃, it is determined that a fire accident occurs in the power cable, and therefore the output value of the temperature transmitter 220 corresponding to 100 ℃ is used as the alarm trigger value of the back-end alarm device. When the output value of the temperature transmitter 220 exceeds the alarm trigger value, the rear-end alarm module is triggered to act, at this time, the originally normally open dry contact in the alarm module 230 is closed, the alarm bell, the alarm lamp or other alarm devices are powered on, and a Field alarm is sent out, or an alarm signal is generated through a Field Supervisory Unit (FSU) module of a moving ring, and the alarm signal is uploaded to a communication dynamic environment monitoring system to send out a remote alarm, so that the alarm of the power cable ignition and combustion of a communication machine room is realized. The alarm module architecture may be as shown in fig. 3.
Fig. 3 is a schematic diagram showing the alarm device 200 provided by the present invention, and the splitting, combining and adding of modules are within the scope of the present invention without departing from the concept of the present invention. The warning device 200 provided by the present invention can be implemented by software, hardware, firmware, plug-in and any combination thereof, which is not limited by the present invention.
In the present application:
the manufacturing process of the twisted thermocouple wire sensor is special, the twisting pressure formed by twisting the positive and negative bimetallic wires of the thermocouple is combined by means of external force of ignition flame caused by fire, the twisting distance of the twisted positive and negative metal wires is controlled to be 10-20 mm, and the exposed ends of the positive and negative bimetallic wires are twisted and then welded, so that a new bimetallic contact point (working end) is formed after an insulating layer of the wires is eliminated by combustion, and the temperature of the newly formed contact point position is detected. This particular manufacturing process ensures that the following effects are achieved: on one hand, when no fire is generated inside or outside the power cable, even if the original tail end welding points of the positive and negative bimetallic wires fall off, a reference temperature value can be obtained by virtue of a tail end twisted contact point formed by twisting and welding the wires, and whether the sensor is in a normal working state or not can be confirmed; on the other hand, when the power cable is on fire internally or externally, the positive and negative bimetallic wires can touch together by means of flame external force, so that a new working end is automatically formed, and the temperature of the ignition point is ensured to be detected in real time.
The stranded thermocouple wire sensor is used for detecting the fire burning of the cable, and the stranded bimetallic conductor is not touched (cannot form a working end) due to the existence of the insulating layer at ordinary times and is touched together (form a temporary working end) under the action of the stranded force after the insulating layer is burnt by fire, so that the novel temperature measuring method for the full-wire random temperature measuring target is realized. The twisted thermocouple wire sensor is laid along the power cable to be detected in a clinging mode, when a fire disaster happens to the inside or the outside of a certain point of the power cable, a novel sensor insulating layer (including an anode bimetallic wire insulating layer, a cathode bimetallic wire insulating layer and an outermost layer insulating layer) clinging to the cable can be quickly fused and shrunk as long as flame is large enough. Therefore, the twisted positive and negative bimetallic wires are instantly touched to form a new temporary working end, the temperature of the ignition and combustion point of the power cable can be accurately detected in real time, and the alarm of the ignition and combustion of the power cable is realized.
The detection and alarm device for the communication machine room power cable fire is formed by combining the twisted thermocouple wire sensor, the temperature transmitter and the alarm module, and the detection and alarm for the communication machine room power cable fire burning event are realized by means of the twisted thermocouple wire all-wire fire detection capability and setting a reasonable alarm threshold value.
Thus, the application has the following advantages:
the production and application cost of the twisted thermocouple wire is low, and the twisted thermocouple wire is suitable for being applied to fire detection and alarm of power cables of communication equipment rooms in large quantities; the twisted thermocouple wire can become a special detection sensor for the fire and combustion of the power cable of the communication machine room, the detection range and the detection precision of the twisted thermocouple wire can meet the requirements of the application scene, and whether the fire and combustion event occurs in the whole power cable can be accurately detected; the power cable warning device based on the twisted thermocouple wire for the communication machine room is high in warning reliability and strong in warning real-time performance, and can accurately recognize the power cable fire burning event in real time and send out a warning.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A twisted thermocouple wire sensor, comprising:
the positive electrode lead comprises a positive electrode first section of lead coated with a first insulating layer and a positive electrode second section of lead not coated with the first insulating layer;
a negative electrode lead comprising a negative electrode first section of lead coated with a second insulating layer and a negative electrode second section of lead not coated with the second insulating layer,
the positive first section of lead and the negative first section of lead are twisted to form a twisted section, and the positive second section of lead and the negative second section of lead are twisted to form a fixed temperature measuring working end.
2. The twisted thermocouple wire sensor according to claim 1, wherein the first and second insulation layers of the twisted section are melted by heating, and the positive lead contacts the negative lead to form an intermediate temperature measuring working end.
3. The twisted thermocouple wire sensor according to claim 1, wherein the fixed temperature measuring working end is formed by welding after the positive first segment of wire and the negative first segment of wire are twisted.
4. The twisted thermocouple wire sensor according to claim 1, further comprising: and the protective sleeve coats the positive electrode lead and the negative electrode lead.
5. The stranded thermocouple wire sensor of claim 4, wherein the protective sheath, the first insulating layer, and the second insulating layer are polyethylene material.
6. The twisted thermocouple wire sensor according to claim 1, wherein the twisted section has a twist lay length of 10mm or more and 20mm or less.
7. The twisted thermocouple wire sensor according to claim 1, wherein the cross-sectional diameter of the positive lead and the negative lead is 0.5mm or greater.
8. An alert device, comprising:
the twisted thermocouple wire sensor according to any one of claims 1 to 7, comprising a meter connection end;
the input end of the temperature transmitter is connected with the instrument connecting end of the twisted thermocouple wire sensor;
and the alarm module is connected with the output end of the temperature transmitter and is configured to alarm the temperature when the temperature sensed by the twisted thermocouple wire sensor transmitted by the temperature transmitter is greater than a set threshold value.
9. The alerting device of claim 8 wherein the alerting module comprises: the temperature transmitter comprises a control circuit, a power supply and an alarm signal generation module, wherein the control circuit is connected to the output end of the temperature transmitter, and when the temperature signal received by the control circuit is greater than a set threshold value, the alarm signal generation module is controlled to be communicated with the power supply so as to generate an alarm signal.
10. The warning device as claimed in claim 8, wherein the warning device is used in a communication room, and the twisted thermocouple wire sensor is closely laid along a power cable to be detected.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115493718A (en) * | 2022-09-06 | 2022-12-20 | 深圳市基克纳科技有限公司 | Temperature measuring device and method and electronic atomization equipment |
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| CN104318704A (en) * | 2014-10-11 | 2015-01-28 | 青岛中阳消防科技有限公司 | Switching linear passive temperature sensing element |
| CN209280163U (en) * | 2019-01-30 | 2019-08-20 | 浙江泰索科技有限公司 | A kind of armouring pair twist thermocouple |
| CN111863320A (en) * | 2020-07-27 | 2020-10-30 | 昆山安胜达微波科技有限公司 | Flexible high-precision K-type thermocouple sensor cable |
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| CN115493718A (en) * | 2022-09-06 | 2022-12-20 | 深圳市基克纳科技有限公司 | Temperature measuring device and method and electronic atomization equipment |
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