A temperature control alarm wiring device based on surface acoustic wave technology

Abstract

The present invention relates to the technical field of wiring terminals, and discloses a temperature control alarm wiring device based on surface acoustic wave technology, which adopts a thermoelectric transducer to sense the temperature in a wiring box body, and when the temperature in the wiring box body is greater than a preset temperature threshold, an electrical signal is generated, and the electrical signal is converted into an acoustic signal, so that the acoustic signal is transmitted to the acoustic-electric transducer in a substrate group conduction unit in the form of a mechanical resonant wave, and the acoustic signal transmitted by the substrate group conduction unit is converted into an electrical signal through the acoustic-electric transducer, and the electrical signal is sent to an alarm unit for alarm, thereby realizing a passive wireless temperature measurement method, which can effectively ensure the equipment safety of the wiring box body, does not generate additional equipment risks, and is convenient for temperature measurement and early warning, thereby improving practicality.

Description

Technical Field

[0001] The invention relates to the technical field of wiring terminals, and in particular to a temperature control alarm wiring device based on surface acoustic wave technology. Background Art

[0002] In modern technology, many outdoor distribution boxes and indoor distribution boxes now need to be equipped with metering and mutual control terminals to monitor the quality of electrical signals. However, due to the need to protect the equipment inside the box, the box must have good sealing requirements. This makes the electrical components in the box prone to overheating and sparking, which can lead to fires.

[0003] At present, the commonly used protection technical measures are mainly passive protection such as installing heat dissipation modules, which makes it difficult to monitor and prevent the overload heating problem of the metering device wiring in the box in real time and in advance, and lacks subjective initiative. With the development of science and technology, the operation and maintenance control means of equipment will inevitably develop towards the mode of automated early warning, and the real-time monitoring of electrical equipment will develop into an important emerging field in the power system.

[0004] The existing overheating protection technology for metering junction boxes in distribution boxes is mainly divided into two directions. One is to perform heat dissipation modification on the distribution box, but this protection method tends to be passive protection. When the metering device wiring in the box is overloaded, the temperature of the connection part of the junction box may even reach over 150°C, and the heat dissipation device is difficult to play a protective role. At the same time, overheating of the junction box itself means that the equipment is in an unsafe operating state, and the passive protection method cannot provide early warning for the equipment, preventing damage to the equipment. Another direction is to install an automatic early warning device on the junction box, which is more proactive than the first protection method and can achieve real-time monitoring and active protection of the equipment, but how to ensure the stable supply of energy for the early warning device has become a new technical problem.

[0005] There are two main ways of taking power. One is to take power through the AC / DC conversion module. However, the AC / DC conversion module is installed in the closed space of the box, which is greatly affected by the operating status of the equipment. Overheating and discharge failures are inevitable during operation, which will increase the risk factor of the equipment again. The second is to take power non-contactly through CT, but this CT power supply method must require the primary current of the bus to be in a normal state, generally to ensure that it is greater than 50A. When the winding is completed, the transformation ratio has been determined. When the bus current is small, the current induced by the secondary side of the CT is very weak. Since the monitoring equipment has a wireless transmission module on it, plus other peripheral circuits, it generally requires at least tens of mA of instantaneous current when the radio frequency is transmitted. Obviously, the current induced by the CT at this time cannot supply the normal operation of the monitoring equipment. As for the electrical signal supply system that requires external energy such as solar energy and wind energy, it is even more difficult to have practical application value when it is applied to the device in the closed box for energy supply. As a result, the current power-taking method of the current metering junction box anti-overheating warning method is not convenient and practical. Summary of the invention

[0006] The present invention provides a temperature control alarm wiring device based on surface acoustic wave technology, which solves the technical problem that the power supply method of the current metering junction box overheating warning method is not convenient and practical enough.

[0007] In view of this, the first aspect of the present invention provides a temperature control alarm wiring device based on surface acoustic wave technology, comprising: a wiring box body; a thermoelectric transducer, a substrate group conduction unit, an acoustic-electric transducer and an alarm unit are arranged in the wiring box body, the thermoelectric transducer is connected to the substrate group conduction unit, the substrate group conduction unit is connected to the acoustic-electric transducer, and the acoustic-electric transducer is connected to the alarm unit;

[0008] The thermoelectric transducer is used to sense the temperature inside the junction box body. When the temperature inside the junction box body is greater than a preset temperature threshold, an electrical signal is generated and converted into an acoustic signal, so that the acoustic signal is conducted to the acoustic-electric transducer in the substrate assembly conducting unit as a mechanical resonant wave;

[0009] The acoustic-electric transducer is used to convert the acoustic signal conducted by the substrate group conducting unit into an electrical signal, and send the electrical signal to the alarm unit;

[0010] The alarm unit is used for giving an alarm according to the electrical signal.

[0011] Preferably, the substrate group conducting unit adopts a plurality of piezoelectric substrates connected in parallel, and the center frequencies of the piezoelectric substrates match the center frequencies of the thermoelectric transducer and the acoustic-electric transducer, respectively.

[0012] Preferably, the junction box body is covered and provided with thermally conductive silica gel.

[0013] Preferably, a plurality of heat dissipation channels with hollow structures are provided in the junction box body.

[0014] Preferably, the alarm unit comprises a GPRS signal transmission module, and the GPRS signal transmission module is used to send a preset alarm message to a designated mobile terminal.

[0015] It can be seen from the above technical solutions that the present invention has the following advantages:

[0016] The present invention adopts a thermoelectric transducer to sense the temperature inside the junction box body. When the temperature inside the junction box body is greater than a preset temperature threshold, an electrical signal is generated and converted into an acoustic signal, so that the acoustic signal is transmitted to the acoustic-electric transducer in the substrate group conduction unit in the form of a mechanical resonance wave. The acoustic signal transmitted by the substrate group conduction unit is converted into an electrical signal through the acoustic-electric transducer, and the electrical signal is sent to the alarm unit for alarm, thereby realizing a passive wireless temperature measurement method, which can effectively ensure the equipment safety of the junction box body and does not generate additional equipment risks, thereby facilitating temperature measurement and early warning, and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a temperature control alarm wiring device based on surface acoustic wave technology provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a junction box body of a temperature control alarm junction device based on surface acoustic wave technology provided by an embodiment of the present invention;

[0019] Figure 3 Another structural schematic diagram of a junction box body of a temperature control alarm junction device based on surface acoustic wave technology provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] For easier understanding, see Figures 1-2The present invention provides a temperature control alarm wiring device based on surface acoustic wave technology, comprising: a wiring box body 100; a thermoelectric transducer 10, a substrate group conduction unit 20, an acoustic-electric transducer 30 and an alarm unit 40 are arranged in the wiring box body 100, the thermoelectric transducer 10 is connected to the substrate group conduction unit 20, the substrate group conduction unit 20 is connected to the acoustic-electric transducer 30, and the acoustic-electric transducer 30 is connected to the alarm unit 40;

[0022] The thermoelectric transducer 10 is used to sense the temperature in the junction box body 100. When the temperature in the junction box body 100 is greater than a preset temperature threshold, an electrical signal is generated and converted into an acoustic signal, so that the acoustic signal is transmitted to the acoustic-electric transducer 30 in the substrate assembly conducting unit 20 as a mechanical resonant wave.

[0023] The thermoelectric transducer 10 is internally provided with a temperature threshold. When the sensed temperature is greater than the temperature threshold set internally, an electrical signal is generated. The temperature threshold may be a factory setting.

[0024] The acoustic-electric transducer 30 is used to convert the acoustic signal conducted by the substrate group conducting unit 20 into an electrical signal, and send the electrical signal to the alarm unit 40;

[0025] The alarm unit 40 is used to generate an alarm according to the electrical signal.

[0026] It should be noted that the basic principle of the present device is: when the junction box body 100 is heated, the thermoelectric transducer 10 senses the temperature inside the junction box body 100, converts the temperature into an electrical signal, and converts the electrical signal into an acoustic signal through the inverse piezoelectric effect, which is then conducted on the surface of the substrate group conduction unit 20 through the mechanical resonance wave mode, received by the acoustic-electric transducer 30, and converted into an electrical signal for output, thereby converting the inverse piezoelectricity generated by the mechanical resonance wave into an electrical signal to drive the alarm unit 40 for signal transmission, thereby realizing an alarm.

[0027] The device can realize that when the device is operating normally, the substrate group conduction unit 20 has no electricity, and once the temperature rises, an electric signal loop can be formed to drive the alarm unit 40 to alarm. Its passive wireless temperature measurement method can effectively ensure the equipment safety of the junction box body 100 without generating additional equipment risks, thereby facilitating temperature measurement and early warning, and improving practicality.

[0028] In a specific embodiment, the substrate group conducting unit 20 uses a plurality of piezoelectric substrates connected in parallel, and the center frequencies of the piezoelectric substrates match the center frequencies of the thermoelectric transducer 10 and the acoustic-electric transducer 30 respectively.

[0029] The center frequency of the piezoelectric substrate is matched with the center frequency of the thermoelectric transducer 10 and the center frequency of the acoustic-electric transducer 30 respectively, thereby avoiding interference caused by other frequency signals and improving the accuracy of the early warning.

[0030] In a specific embodiment, Figures 2-3 As shown, the junction box body 100 is covered and provided with thermal conductive silica gel. At the same time, the junction box body 100 is provided with a plurality of hollow heat dissipation channels.

[0031] The thermally conductive silicone covering the inside of the junction box body 100 is a two-component condensation type, which does not release heat, is non-corrosive, and has a small shrinkage rate when solidified, forming a thermally conductive insulation system. At the same time, the terminal assembly is punched near the mounting surface, and on the basis of reserving the mounting positions of each transducer and the substrate group conduction unit 20, the U-shaped groove at the front of each terminal assembly connected in combination with the thermally conductive insulation system leads to the upper space to form convection, effectively expanding the convection space.

[0032] In a specific embodiment, the alarm unit 40 includes a GPRS signal transmission module, and the GPRS signal transmission module is used to send a preset alarm message to a designated mobile terminal.

[0033] Among them, in actual application, a pre-set SMS push can be performed, in which the acoustic-electric transducer 30 is directly connected to the metering mutual control terminal antenna to realize the real-time overheating alarm function.

[0034] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0035] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0036] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature control alarm wiring device based on surface acoustic wave technology, It is characterized in that include: Junction box body; The junction box body is provided with a thermoelectric transducer, a substrate group conduction unit, an acoustic-electric transducer and an alarm unit, the thermoelectric transducer is connected to the substrate group conduction unit, the substrate group conduction unit is connected to the acoustic-electric transducer, and the acoustic-electric transducer is connected to the alarm unit; The thermoelectric transducer is used to sense the temperature inside the junction box body. When the temperature inside the junction box body is greater than a preset temperature threshold, an electrical signal is generated and converted into an acoustic signal, so that the acoustic signal is conducted to the acoustic-electric transducer in the substrate assembly conducting unit as a mechanical resonant wave; The acoustic-electric transducer is used to convert the acoustic signal conducted by the substrate group conducting unit into an electrical signal, and send the electrical signal to the alarm unit; The alarm unit is used for giving an alarm according to the electrical signal.

2. The temperature control alarm wiring device based on surface acoustic wave technology according to claim 1, It is characterized in that The substrate group conducting unit adopts a plurality of piezoelectric substrates connected in parallel, and the center frequency of the piezoelectric substrates matches the center frequency of the thermoelectric transducer and the center frequency of the acoustic-electric transducer respectively.

3. The temperature control alarm wiring device based on surface acoustic wave technology according to claim 1, It is characterized in that The junction box body is covered and provided with heat-conducting silica gel.

4. The temperature control alarm wiring device based on surface acoustic wave technology according to claim 1, It is characterized in that The junction box body is provided with a plurality of heat dissipation channels with hollow structures.

5. The temperature control alarm wiring device based on surface acoustic wave technology according to claim 1, It is characterized in that The alarm unit comprises a GPRS signal transmission module, and the GPRS signal transmission module is used to send a preset alarm message to a designated mobile terminal.

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