KR101396545B1 - Distribution panel being equipped with sensing system with multile temperature sensor - Google Patents

Abstract

A distributing board including a multi-temperature sensor sensing system is disclosed. The said invention is composed of a distributing facility, twelve surface acoustic wave (SAW) temperature sensors transmitting a surface acoustic wave including temperature information of each connection point of the facility by modulating it into a signal of a corresponding band width and a predetermined central frequency, and an antenna transmitting the surface acoustic wave to the outside by receiving it from the twelve SAW temperature sensors. By the distributing board including the multi-temperature sensor sensing system, a sensor can be operated without a battery as the SAW temperature sensors are installed in the distributing board, thereby easing maintenance. In addition, the temperature for each connection point can be monitored in real time as it separately senses the temperature of each connection point of the facility by including the SAW temperature sensors in the distributing board.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-temperature sensor sensing system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchboard, and more particularly to an switchboard having a multiple temperature sensor sensing system.

The temperature environment is very important for electric power facilities and industrial facilities such as switchboards (or water fronts), transformer facilities, transmission facilities, motor control panels, distribution boards, and so on.

Most of the switchboards are equipped with high-voltage breakers and low-voltage breakers to protect the load devices and circuits from overcurrent and abnormal currents. These breakers are electrically connected using a bus-bar and a bus clip for mutual connection and disconnection, and a busbar, which is a conductive metal material, is applied in consideration of the power capacity.

The high-voltage and high-capacity bus-bar and bus clip are heated by joule heat when energized, and are loosened by repeated connection and disconnection, thereby increasing the connection resistance . Further, the contact resistance changes depending on the occurrence of abnormality such as foreign objects on the connection surface, oxidation, corrosion, and the like, thereby causing damage to the electric power equipment due to excessive heat generation. Sometimes it is connected with a fire or something, and it causes big property damage.

If the power is cut off as a result of such measures, a large economic loss due to the interruption of the power supply facility is caused, and an unstable power supply may eventually cause a safety accident.

As such, conventional switchboards are required to monitor switchboards in real time and prevent their occurrence before a problem occurs, since the losses or consequences that follow due to a small problem are very large and excessive.

Conventionally, there is no way to continuously monitor a large number of connection points of a distribution facility where overheat can be detected, and a wireless temperature sensor such as a conventional battery 10-0862031 is operated by a battery (battery) method Therefore, there is a problem that maintenance is difficult. There is a problem that the battery may be temporarily disabled when the battery is discharged.

On the other hand, electric power facilities such as switchboards should sense overheating for a large number of connection points therein, and in many cases, a number of switchboards are scattered around and installed in a single building or facility.

There is usually no need to detect a temperature for at least 10 or more connection points in one switchboard, and there is no disclosure of a technology for wirelessly receiving, distinguishing, and processing the temperature of each connection point.

In the past, it was necessary to use temperature sensors to detect the temperature of important junctions or the entire switchboard in the switchboard.

Therefore, a system and a method are required to distinguish and receive temperature sensed at a number of connection points in an electric power facility such as an electric distribution panel, and monitor them at a time.

Korea Patent Office Registration No. 10-1171723

It is an object of the present invention to provide an ASSEMBLY with a multiple temperature sensor sensing system.

The above and other objects and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which: FIG. A surface acoustic wave driven by a sensor-driven microwave signal received from the outside and including temperature information of predetermined connection points of the power distribution facility, Twelve surface acoustic wave (SAW) temperature sensors for modulating and transmitting; And one antenna for receiving surface acoustic waves from the twelve SAW temperature sensors and transmitting them outwardly.

At this time, the SAW temperature sensor generates a surface acoustic wave by vibrating according to inherent elastic constant and temperature. An antenna for wirelessly receiving the sensor driving microwave signal; The sensor driving microwave signal received through the antenna is input and the piezoelectric substrate vibrates at a frequency gradually lowered as the temperature of the point-to-point rises by the input sensor driving microwave signal, An inter digital transducer (IDT) for modulating a surface acoustic wave having a frequency by a predetermined center frequency; And a reflector for reflecting and transmitting the surface acoustic wave modulated by the interdigital transducer.

The interdigital transducer may be configured to modulate the surface acoustic waves with different intrinsic center frequencies predetermined within a range of 428 MHz to 439 MHz for each SAW temperature sensor and a bandwidth of ± 75 kHz.

Meanwhile, the predetermined center frequency is a frequency for discriminating the SAW temperature sensors from each other, and different frequencies are assigned to each SAW temperature sensor in one switchboard. The assigned frequencies are allocated to SAW And is preferably configured to be reassignable or reusable to the temperature sensor.

According to the switchboard having the above-described multiple temperature sensor sensing system, since a plurality of SAW temperature sensors are installed in the switchboard, there is an effect that the sensor can be operated in a non-power source without a separate battery (dry battery). Thus, maintenance / repair becomes easy.

In addition, the present invention provides 12 SAW temperature sensors in the switchboard to detect the temperature of each of the connection points of the distribution facility, thereby realizing monitoring of the temperature of each connection point in real time.

In particular, since the temperature of each of the connection points is transmitted at different frequencies and the respective connection points can be distinguished from the remote, there is an effect that the deterioration at any connection point of any of the distribution panels can be accurately confirmed in real time.

Therefore, the deterioration can be prevented in advance through the temperature change of the connection point, and the situation such as fire or power cutoff can be prevented.

FIG. 1A is a block diagram of a distribution board having a multiple temperature sensor sensing system according to an embodiment of the present invention.
1B is a connection configuration diagram of a plurality of switchboards having a multiple temperature sensor sensing system according to an embodiment of the present invention.
2 is a perspective view of a SAW temperature sensor according to an embodiment of the present invention.
3 is an exemplary view of a temperature sensing monitoring screen according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail to the concrete inventive concept.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1A is a block diagram of a switchboard having a multiple temperature sensor sensing system according to an embodiment of the present invention. FIG. 1B is a block diagram of a plurality of switchboards having multiple temperature sensor sensing systems according to an exemplary embodiment of the present invention. FIG .

1A and 1B, an electrical switchboard 100 having a multiple temperature sensor sensing system according to an embodiment of the present invention includes a power distribution unit 110, a surface acoustic wave (SAW) ) Temperature sensor 120 and an antenna 130. The temperature sensor 120 may be a temperature sensor.

1B schematically shows a connection relationship between one switchboard 100 and an external system. In FIG. 1B, a plurality of switchboards 100 are connected to an external reader 300, a hub 400 and a monitoring terminal 500 ), Which are shown in Fig. In FIG. 1B, the multiplexer 200 of FIG. 1A is shown embedded in the reader 300.

The switchboard 100 is configured so that twelve SAW temperature sensors 120 are installed in the switchboard so that the temperature can be sensed in a non-power source without a separate battery (dry battery). Maintenance and repair costs and efforts are reduced.

Particularly, a plurality of SAW temperature sensors 120 are provided in the switchboard 100 to sense temperature of each connection point of the power distribution facility 110, and the temperature of each configuration of the power distribution facility 110 is closely detected It is possible to completely prevent deterioration or fire.

The switchboard 100 is configured to transmit the temperatures of the respective connection points at different frequencies so that the connection points can be distinguished from a remote place so that it is possible to accurately ascertain in real time which detachment occurred in which connection point of the distribution board. Here, the configuration for transmitting at different frequencies is for recognizing the temperature sensor 120 through different frequencies, which are predetermined frequencies for each temperature sensor 120 in advance.

Hereinafter, the detailed configuration will be described.

The power distribution unit 110 has a configuration for power distribution of the power distribution board 100, and various connection points such as components and cables are formed.

The twelve SAW temperature sensors 120 may be configured to receive a sensor-driven microwave signal externally, and to be driven thereby to transmit surface acoustic waves each containing temperature information.

As shown in FIG. 1B, twelve SAW temperature sensors 120 are provided for each connection point in one switchboard 100 to detect the temperature. If necessary, more SAW temperature sensors 120 are installed to detect the temperature .

When a sensor-driven microwave signal is received by an external reader 300 through an antenna 130 and the received sensor-driven microwave signal is wirelessly transmitted to each SAW temperature sensor 120, the SAW temperature sensor 120 is driven And the temperature is measured. The SAW temperature sensor 120 generates a surface acoustic wave in the SAW temperature sensor 120 and transmits the SAW temperature sensor 120 to the antenna 130 in the center frequency of the corresponding SAW temperature sensor 120 and in the allocated bandwidth, The multiplexer 200 of FIG.

Hereinafter, the SAW temperature sensor 110 will be described in more detail with reference to FIG. 2 for a moment.

2 is a perspective view of a SAW temperature sensor according to an embodiment of the present invention.

2, the SAW temperature sensor 120 may be configured to include a piezoelectric substrate 121, an antenna 122, an inter digital transducer (IDT) 123, and a reflector 124 .

The piezoelectric substrate 121 is configured to have an inherent elastic constant according to the constituent material thereof.

The piezoelectric substrate 121 is configured to vibrate according to the inherent elastic constant and the temperature of the connection point. The piezoelectric substrate 121 generates or generates surface acoustic waves generated by the vibration.

Here, it is preferable that the SAW temperature sensor 120 is configured to have a temperature measurement range of -20 degrees to 120 degrees. The piezoelectric substrate 121 is preferably configured to generate a surface acoustic wave vibrating at different frequencies in a temperature range of -20 degrees to 120 degrees.

The frequency of the surface acoustic wave becomes linearly lower as the temperature rises and linearly increases as the temperature rises. Thus, if the intrinsic characteristics indicating the relationship between the temperature and the frequency of the surface acoustic wave in accordance with the material composition and the material composition of the piezoelectric substrate 121 are known in advance, the temperature can be known only by the frequency of the surface acoustic wave.

The antenna 122 is provided on the piezoelectric substrate 121 and wirelessly receives the sensor driving microwave signal from the reader 300 and the piezoelectric substrate 121 is driven by the sensor driving microwave signal. This is because the piezoelectric substrate 121 can be driven by a high-frequency wave, that is, a microwave signal in accordance with the piezoelectric effect.

The antenna 122 is preferably configured as a multi-recognition type antenna so that signals of up to 32 SAW temperature sensors 120 can be recognized.

In this case, the SAW temperature sensor 120 for a maximum of 32 connection points in one switchboard 100 may be provided and configured to detect the corresponding temperature.

When the sensor driving microwave signal wirelessly received via the antenna 122 is input and the piezoelectric substrate 121 vibrates at a different frequency depending on the input sensor driving microwave signal, And is transmitted to an interdigital transducer 123. The interdigital transducer 123 is configured to modulate a surface acoustic wave at a predetermined center frequency and bandwidth by the vibration of the piezoelectric substrate 121 .

Here, the interdigital transducer 123 can be configured to transmit and transmit surface acoustic waves with a predetermined center frequency within a range of 428 MHz to 439 MHz as a carrier frequency.

At this time, the center frequency is predetermined for each SAW temperature sensor 120, and is configured such that it does not overlap with another SAW temperature sensor 120 in at least one switchboard 100, It is preferable that it is constituted by ± 75 kHz. That is, the predetermined center frequency is a frequency for distinguishing the SAW temperature sensors 120 from each other.

Therefore, different frequencies must be assigned to each SAW temperature sensor 120 in one switchboard 100, and assigned frequencies do not overlap with each other, so that it is possible to identify which SAW temperature sensor 120 is a signal.

It is preferable that the signal modulated in the interdigital transducer 123 is transmitted with power tuned to such a degree that it can be received in one switchboard 100.

At this time, the center frequencies may be allocated so as not to overlap each other only in one switchboard 100, and the center frequencies of the other switchboards 100 may be reallocated or reused. The signal at the center frequency will not reach the other distribution board 100 far away due to the appropriate transmission power.

The reflector 124 is configured to reflect and transmit surface acoustic waves coupled with the center frequency by the interdigital transducer 123.

1A and 1B, a multiplexer 200 receives a surface acoustic wave received by each of a plurality of switchboards 100 via a coaxial cable connected to a plurality of switchboards 100, and multiplexes ) And output the multiplexed surface acoustic wave to one coaxial cable. Since the number of the switchboards 100 can be several tens to several hundreds, they are all received and multiplexed through a coaxial cable.

The reader 300 is configured to transmit a sensor driving microwave signal to the switchboard 100 and to receive the surface acoustic wave output from the multiplexer 200 and transmit the surface acoustic wave to the hub 400 or the monitoring terminal 500.

The reader 300 may be configured to include a processor and a resonator therein as well as a configuration for transmission and reception.

The reader 300 is configured to detect the temperature value (surface acoustic wave) of the SAW temperature sensor 120 through the center frequency using the resonator of each SAW temperature sensor 120.

The reader 300 is configured to store a predetermined center frequency for each SAW temperature sensor 120 in advance.

In addition, the reader 300 is configured to transmit the sensor-driven microwave signal to the switchboard 100 under the control of the processor, and can be configured to transmit the surface acoustic wave or the temperature value itself to the multiplexer 200. [

The processor generates a sensor driving microwave signal, demultiplexes the surface acoustic waves received from the multiplexer 200, separates the demultiplexed surface acoustic wave or the temperature value itself calculated by demodulating the demultiplexed surface acoustic wave by the SAW temperature sensor 120 Lt; / RTI >

The reader 300 may be configured to transmit the surface acoustic wave to the hub 400 or the monitoring terminal 500 separately from the SAW temperature sensors 120 in the processor.

Here, as shown in FIG. 1B, the multiplexer 200 may be embedded in the reader 300. FIG.

The reader 300 is a kind of PC (personal computer) interface for interfacing with the multiplex 200, the hub 400, or the monitoring terminal 500. RS-232C, RS-485, E-NET, CAN, MODE- BUS, and the like. The reader 300 may directly fetch an analog signal, and may be configured by one or a combination of one or more of the above communication methods.

The processor of the reader 300 may convert the signal of the SAW temperature sensor 120 into a quadrature sample stream and a double heterodyne down-conversion in a commonly used in- Domain to a transmitter-receiver module (not shown) of the reader 300. The reader /

The processor of the reader 300 acquires the signal using discrete Fourier transform (DFT), power spectral density (PSD), curve fit interpolation, and in- phase quadrature samples. < RTI ID = 0.0 >

The transmitter / receiver module of the reader 300 is configured to generate and transmit a long and uniform ring-down signal through a resonator, and the Q value of the resonator can be determined in consideration of the radiation resistance and the antenna resistance. In addition, the transmission pulse width can be configured to have a pulse width of about 3 dB to reduce power consumption.

Meanwhile, the hub 400 may be configured to receive surface acoustic waves from the respective readers 300 and to transmit the surface acoustic waves to the monitoring terminal 500 when a plurality of the readers 300 exist. In the case where there is only one reader 300 or the number of the reader 300 is small, the hub 400 may be omitted.

The monitoring terminal 500 may be configured to receive surface acoustic waves or the temperature value itself from the reader 300 or the hub 400 and to display the received surface acoustic wave or temperature value for each of the plurality of SAW temperature sensors 120 .

As shown in FIG. 1B, even if the number of the switchboards 100 installed in a high-rise building or a facility is great

4 is an exemplary view of a temperature sensing monitoring screen according to an embodiment of the present invention.

As shown in FIG. 4, the user can monitor the real-time temperature for each SAW temperature sensor 120 through the monitoring screen, and inform the user of the overheat in the alarm.

When the SAW temperature sensor 120 is in the range of several tens to several hundreds or more, it is preferable to display the SAW temperature sensor 120 and its position on the pop-up screen using a specific threshold value.

Such a temperature sensing system is advantageous in terms of maintenance because it can be configured as a non-power source by the SAW temperature sensor 120.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. There will be.

110: Distribution equipment 120: SAW temperature sensor
121: piezoelectric substrate 122: antenna
123: Interdigital transducer 124: Reflector
130: Antenna 200: Multiplexer
300: Reader 400: Hub
500: Monitoring terminal

Claims (3)

Power distribution equipment;
A surface acoustic wave driven by a sensor-driven microwave signal received from the outside and including temperature information of predetermined connection points of the power distribution facility, Twelve surface acoustic wave (SAW) temperature sensors for modulating and transmitting;
And one antenna for receiving surface acoustic waves from the twelve SAW temperature sensors and sending them out to the outside,
The SAW temperature sensor comprises:
A piezoelectric substrate which vibrates according to an inherent elastic constant and temperature to generate surface acoustic waves;
An antenna for wirelessly receiving the sensor driving microwave signal;
The sensor driving microwave signal received through the antenna is input and the piezoelectric substrate vibrates at a frequency gradually lowered as the temperature of the point-to-point rises by the input sensor driving microwave signal, An inter digital transducer (IDT) for modulating a surface acoustic wave having a frequency by a predetermined center frequency;
And a reflector for reflecting and transmitting the surface acoustic wave modulated by the interdigital transducer,
The interdigital transducer includes:
And modulates the surface acoustic wave with a specific center frequency different from the predetermined specific frequency within a range of 428 MHz to 439 MHz for each SAW temperature sensor,
The predetermined center frequency is a frequency
As a frequency for distinguishing the SAW temperature sensors from each other, different frequencies are allocated to each SAW temperature sensor in one switchboard, and assigned frequencies are reallocated or reusable to the SAW temperature sensors in the switchboard and the other switchboards Lt; / RTI >
When an external reader receives the sensor driving microwave signal through the antenna and the received sensor driving microwave signal is wirelessly transmitted to each SAW temperature sensor, the SAW temperature sensor is driven to measure the temperature, and the SAW temperature sensor And transmits the surface acoustic wave to an antenna through a center frequency value of the corresponding SAW temperature sensor and an allocated bandwidth. The antenna transmits the surface acoustic wave to an external multiplexer,
Wherein the SAW temperature sensor is configured to have a temperature measurement range of -20 degrees to 120 degrees and the piezoelectric substrate is configured to generate surface acoustic waves oscillating at different frequencies in a temperature range of -20 degrees to 120 degrees,
The antenna is configured as a multi-recognition type antenna so that signals of up to 32 SAW temperature sensors can be recognized,
Wherein the signal modulated in the interdigital transducer is transmitted with tuned power that can be received in one switchboard. ≪ Desc / Clms Page number 13 >
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