KR102102097B1 - Method for wireless warning for live wire and apparatus for performing the method - Google Patents

Abstract

The present invention relates to a wireless live-line alerting method and to an apparatus thereof. The wireless live-line alerting method comprises the steps of: detecting an electric signal in an electric device through an antenna, and generating an input signal by a wireless live-line alerting apparatus; and determining whether to generate an alarm based on the input signal and/or an amplification input signal which amplifies the input signal by the wireless live-line alerting apparatus.

Description

Method and wireless warning for live wire and apparatus for performing the method}

The present invention relates to a method and apparatus for wireless live alarm. In more detail, for the safety of workers when working with various power facilities or high-voltage lines, when approaching a live line, it is alerted through a buzzer, a light emitting diode lamp, and a speaker, and adopts a live wire detection antenna to detect the live wire wirelessly. It relates to an alarm method and apparatus.

Generally, a live line refers to a power supply line in a state in which electric power is being supplied. In particular, a live line in which high voltage flows can cause damage to the human body by not only the risk of electric shock but also radiated electromagnetic fields. Electric power generation systems such as cattle and substations, and power facility systems such as outdoor overhead lines or underground lines are discriminated against such high-voltage live wires, and attention is paid to handling or approaching the live wires.

In order to discriminate such a live line, a method of determining whether a high voltage current flows through a measuring instrument such as a tester has been used. There was also a possibility that the measurement process was inconvenient, and the measurement process was inconvenient when the high pressure was measured.

In addition, the conventional live-line warning device adopts a method of positioning a wired cable connected to the alarm device at a certain distance from the live line. This method is not easy to install the live-line warning device when the space inside the equipment such as the switchboard is narrow. There was a disadvantage.

In addition, the conventional live-line alarm device is a method in which a DC power is supplied by a built-in battery or AC power supplied at a place equipped with an alarm device is operated to operate. If the supply is interrupted, it cannot operate because the power is not supplied to the live alarm system, so there is a concern that safety may occur when handling or approaching the live wire.

On the other hand, as a live-line warning device, the switchboard including the live-line alarm device of Korean Patent Publication No. 10-2014-14747 and the composite sensor of the busbar used therein, the switchboard live-line voice alarm device using optical communication of Korean Patent Registration No. 10-892106 And the technology of the proximity type live wire and voice alarm device by measuring the temperature of the power supply unit using the single loop type optical communication of Korean Patent Registration No. 10-1582828 is known.

The present invention aims to solve all the above-mentioned problems.

In addition, the present invention detects the presence or absence of a voltage by just touching or approaching a coating or surface of a conductor such as an electric wire without electrically connecting measurement equipment to an electric wire or a conductor through which electric power is supplied and current flows, It is an object of the present invention to provide a live-line warning device configured to alert a user through a light-emitting diode or a buzzer, and further to provide a configuration of a wireless-type live-line warning device capable of wirelessly detecting a live line.

In addition, the present invention, even if the supply of AC power is interrupted due to battery discharge, power failure, or accident, it is an object of the present invention to provide a live-line warning device that operates to ensure safety without interruption by continuously supplying power to the live-line warning device. do.

The representative configuration of the present invention for achieving the above object is as follows.

According to an embodiment of the present invention, the wireless live-line warning method comprises the steps of: generating an input signal by detecting an electric signal in an electric device through an antenna by the wireless live-line alarm device; Alternatively, it may include determining whether to generate an alarm based on the amplified input signal that amplifies the input signal.

Meanwhile, the input signal may be a signal for detecting a live line state, and the amplified input signal may be a signal for detecting a line voltage existing in a non-live line state.

In addition, the input signal and / or the amplified input signal is filtered and filtered by a filtering unit, and the lines existing in the live state and / or the non-live state are based on the input signal and / or the amplified input signal. Judgment on the voltage can be performed.

According to another embodiment of the present invention, the wireless live-line alarm device is based on an antenna and an input signal and / or an amplified input signal amplifying the input signal, which is implemented to detect an electric signal in the electric device and generate an input signal. And a processor implemented to determine whether to generate an alert.

Meanwhile, the input signal may be a signal for detecting a live line state, and the amplified input signal may be a signal for detecting a line voltage existing in a non-live line state.

In addition, the input signal and / or the amplified input signal is filtered and filtered by a filtering unit, and the lines existing in the live state and / or the non-live state are based on the input signal and / or the amplified input signal. Judgment on the voltage can be performed.

According to the present invention, since the live-line alarm device does not use a separate measuring mechanism as in the prior art, it is possible to easily and safely distinguish and alert the live-line by simply touching or approaching the coating or the surface of a conductor such as an electric wire. .

Further, according to the present invention, since a light emitting diode and / or a buzzer, a speaker, etc. can be selected as the live-line warning means, it is easy and reliable to recognize the warning, and the user can select the warning means according to day and night and place.

In addition, according to the present invention, it is possible to perform the detection of a live wire wirelessly, so there is no need to connect wiring such as a conventional cable, and this allows easy installation even if the internal space of a facility such as a switchboard is narrow, thereby enabling industrial installation. Its applicability is improved.

In addition, according to the present invention, the power of the live-line alarm device is dualized into DC power and AC power supplied from a place equipped with an alarm device, and the AC power is normally supplied to the live-line alarm device by supplying DC power in the event of a power failure or accident. By continuously supplying power without interruption, the safety of live wire detection can be continuously secured.

In addition, it is possible to prevent the risk of accidents that may be caused by secondary charging phenomenon of the line by preventing the danger due to the line-to-line voltage that may have in the non-live state as well as the live line state.

1 to 4 is a conceptual diagram showing a wireless wireless live-line warning device according to an embodiment of the present invention.
5 is a conceptual diagram showing an input circuit of a wireless live-line warning device according to an embodiment of the present invention.
6 is a conceptual diagram showing the operation of the wireless live-line warning device according to an embodiment of the present invention.
7 is a conceptual diagram showing the operation of the wireless live-line warning device according to an embodiment of the present invention.
8 is a conceptual diagram illustrating a signal noise removing structure according to an embodiment of the present invention.

For a detailed description of the present invention, which will be described later, reference is made to the accompanying drawings that illustrate, by way of example, specific embodiments in which the invention may be practiced. These embodiments are described in detail enough to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described in this specification may be implemented by changing from one embodiment to another without departing from the spirit and scope of the present invention. In addition, it should be understood that the position or arrangement of individual components within each embodiment may be changed without departing from the spirit and scope of the present invention. Therefore, the following detailed description is not intended to be done in a limiting sense, and the scope of the present invention should be taken to cover the scope claimed by the claims of the claims and all equivalents thereto. In the drawings, similar reference numerals denote the same or similar components throughout several aspects.

Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to enable those skilled in the art to easily implement the present invention.

1 to 4 is a conceptual diagram showing a wireless wireless live-line warning device according to an embodiment of the present invention.

1 is a perspective view of a wireless live-line warning device of the present invention, FIG. 2 is a side view of the wireless live-line warning device of the present invention, and FIG. 3 is an exploded perspective view of the wireless live-line warning device of the present invention.

1 to 3, the wireless live-line warning device of the present invention may be configured in a form embedded in the case 20 so that it can be easily installed in a housing such as a switchboard or an industrial device.

The lid 10 for shielding the circuit board 40 is coupled to the upper side of the case 20, and the antenna 50 connected to the circuit board 40 is installed to the lower side of the case 20.

Between the case 20 and the lid 10, a flat plate-shaped flange 30 surrounding each side of the lid 10 is placed, and when installed on a switchboard or a housing, screws are attached or attached to the flange 30. It is applied to fix the case 20.

The case 20 is a box-shaped member with an open top, a circuit board 40 of the live-line alarm device of the present invention is embedded in an inner space, and a power input terminal (for applying power to the side of the circuit board 40) A power input port 22 through which 21) is interpolated is formed.

The circuit board 40 is equipped with an alarm circuit for live wire warning, and an antenna 50 for detecting live wire is connected. The configuration of the live wire warning circuit mounted on the circuit board 40 of the present invention will be described later.

In addition, the circuit board 40 is connected to the control terminal 41, the test switch 42, the buzzer switch 43, and the light emitting diode 44 connected to the live alarm circuit, and exposing them to the lid 10 For this purpose, the adjustment terminal insertion hole 11, the test switch insertion hole 12, the buzzer switch insertion hole 13, and the light emitting diode insertion hole 14 are formed on the lid 10, respectively.

On the other hand, the antenna 50 is preferably a folding antenna whose lower portion is folded by a hinge as shown in the side view of FIG. 2. When the antenna 50 detects a live line, the detection electrode INPUT is charged with the voltage flowing through the live line, thereby generating an input signal and performing an alert operation of the live line.

The wireless live-line warning device 1 of the present invention, as shown in the use state diagram of Figure 4, forming a coupling hole formed on the door or side of the facility, such as the switchboard T, and the live-line warning device (1) ) Is attached to the facility by interpolation, and the inside or outside of the switchboard is alerted by the antenna 50 of the wireless live-line warning device 1.

Further, in the wireless live-line warning device 1 of the present invention of the present invention, a voice signal (or sound signal) may be transmitted through a speaker for requesting whether there is a live line to the outside or to stop work due to the presence of voltage. . In addition to the alarm through the light emission using the light emitting diode 44, the alarm for the live line using the voice signal and the non-active line state, but if the line voltage is still present and working is dangerous, it is possible to notify the danger situation through the voice signal have.

5 is a conceptual diagram showing a method of supplying power to a wireless live-line warning device according to an embodiment of the present invention.

Referring to FIG. 5, the power supply unit of the wireless live-line alarm device of the present invention supplies AC power supplied from a place where the wireless live-line alarm device is installed to the AC-DC converter (AC-DC1) and supplied AC power. Can be converted to a DC power supply. However, if the supply of AC power to the alarm device of the present invention is interrupted by an external factor such as a power outage or natural disaster, the power supply to the live alarm system is not supplied, so that the alarm of the live wire cannot be performed, resulting in safety problems. Can be. Therefore, the live alarm system of the present invention can be used in a configuration in which the power supply to the AC-DC converter (AC-DC1) is dualized.

That is, as shown in FIG. 5, the supply line of the AC power (AC-Power) and the supply line of the DC power (DC-Power) are configured, but the supply line of the AC power and the DC power (DC-Power) This is a configuration in which a breaker that selectively opens and closes a supply line is installed.

The switch may use a normal relay or a magnetic contactor (MC), preferably switching a large-capacity power load and arc suppression function in consideration of the live current alarm device of the present invention. It is preferable to use the branch magnetic contactor MC, and the circuit of FIG. 5 is the circuit of the embodiment in which the magnetic contactor MC is connected.

In addition, preferably, on the connection diagram of the power supply unit, the AC power (AC-Power) is a commercial AC power supplied to a place where the live-line alarm device of the present invention is installed, and the DC power (DC-Power) is the present invention. It is DC power supplied from an emergency generator that is installed when a live alarm system is installed and is operated when the supply of commercial AC power is interrupted due to external factors such as a power outage or natural disaster.

Alternatively, the DC power (DC-Power) may be a DC power supplied from a separate battery (not shown) embedded in the switchboard T as shown in FIG. 4 to which the present invention is attached.

The live-line alarm device of the present invention having a power supply as described above, the commercial AC power (AC-Power) supplied to the place where the live-line alarm device is installed is normally supplied by the AC-DC converter (AC-DC1) However, the output of the commercial AC power supply (AC-Power) is a short contact of the magnetic contactor (MC) (closed) of the first contact (r1) and the fifth contact (r5) consisting of a switch and the second contact of the shorted state (r2) and the sixth contact (r6) passing through the switch is supplied to the live-line warning device (1), the AC power supplied to the live-line warning device (1) is an AC-DC converter (AC-DC1 as described above) ) And converted to DC power and applied to the live-line alarm device.

However, when the supply of the commercial AC power (AC-Power) applied to the alarm device of the present invention is stopped due to an external factor such as a power outage or natural disaster, the magnetic switch of the electromagnetic contactor MC is switched, and a short circuit is closed. The switch made of the first contact (r1) and the fifth contact (r5) in the closed state and the switch made of the second contact (r2) and the sixth contact (r6) in the shorted state are closed, and the third contact A switch made of (r3) and a seventh contact (r7) and a switch made of a fourth contact (r4) and an eighth contact (r8) are closed to close the fifth contact (r5) and the sixth contact (r6). The supply of the AC power (AC-Power) in the connected state is cut off, and at the same time, the DC power supply is supplied to the seventh contact point (r7) and the eighth contact point (r8). Direct current power is applied to the live alarm device through a switch composed of a contact (r3) and a seventh contact (r7) and a switch composed of a fourth contact (r4) and an eighth contact (r8).

Therefore, the wireless live-line alarm device of the present invention dualizes the applied power into DC power and AC power supplied from a place equipped with an alarm device, normally supplies AC power, and then operates a switch in case of a power failure or accident to supply DC power. By doing so, the power supplied to the live-line alarm device is continuously supplied without interruption, so that the live-line detection device can continuously detect the live-line, thereby obtaining the effect of continuously securing the safety of the live-line detection.

6 is a conceptual diagram illustrating an input circuit of a wireless live-line warning device according to an embodiment of the present invention.

In FIG. 6, a method for maximizing the sensitivity by adding an amplifying circuit of a non-inverting circuit to the input circuit of the wireless live alarm device is disclosed.

Referring to FIG. 6, an input signal for detecting whether a live line is present may be input to the input circuit. According to an embodiment of the present invention, it is possible to increase the sensitivity to the live line by performing amplification step by step based on the feedback resistance of the non-inverting circuit of the input circuit.

According to an embodiment of the present invention, the feedback resistance of the non-inverting circuit of the input circuit is the first feedback resistance (R36, 615), the second feedback resistance (R37, 625), the third feedback resistance (R38, 635) and the fourth feedback Resistor (R39, 645) may include, the first analog switch (U9A, 610), the second analog switch (U9B, 620), the third analog switch (U9C, 630), the fourth analog switch (U9D, 640) Based on), a feedback resistance of the non-inverting circuit is selected to amplify the input signal.

The input signal introduced into the CON1 (ant input) through the antenna is the first input terminal (# of the amplification units U7, 600) through the second resistor (R2), the first capacitor (C1), and the third resistor (R3). 2, NON inverter input,).

Since the input signal from the amplifying unit 600 enters the non-inverting input, depending on the selected resistance values of the amplifying resistor R40 and the first to fourth feedback resistors R36 to 39, 615, 625, 635, and 645 Can be amplified.

The amplification equation may be AV = (1+ amplification resistance value / selected feedback resistance value (R36 to R39)). In the wireless live-line alarm device according to an embodiment of the present invention, the amplification resistance R40 may have a value of about 100k ohm, the first feedback resistance 615 is 1k ohm, and the second feedback resistance 625 is 2k ohm. , The third feedback resistance 635 may have a value of 3 k ohms, and the fourth feedback resistance 645 may have a value of 4 k ohms. In this case, according to the amplification formula, the amplification value (AV) through the first feedback resistance (615) is 101, the amplification value (AV) through the second feedback resistance (625) is 51, and the third feedback resistance (635) is used. The amplification value (AV) is 26, and the amplification value (AV) through the fourth feedback resistor 645 is 13.5, and the approximate AV value of the wireless live air alarm device according to an embodiment of the present invention may be 13.5 to 101. By setting the first feedback resistor 615 to the fourth feedback resistor 645 to a value of 2 ⁿ , it is possible to sense voltages in the non-active state with different amplification values.

Based on the step-by-step amplification in the input circuit of the wireless live-line warning device, when the wireless live-line warning device installed inside the panel detects a high voltage voltage (live state or residual voltage is present), it is also for a non-live state that is not a live state. It is possible to check the voltage of the line. For example, if the voltage in the live state is 380 V, the voltage in the non-live state is less than 380 V, but even in the non-live state, it may have an unexpected voltage and may lead to an unexpected accident. Most of these non-active lines can be sufficiently dangerous because they are caused by secondary charging of the track. The secondary charging phenomenon is a case in which the line is induced to the line voltage by the transformer principle when the line runs in parallel or when the line has an overlapping section. The line voltage at this time may cause danger to the safety of workers by maintaining the induced voltage.

Based on the amplifying circuit of the non-inverting circuit installed in the input circuit according to the embodiment of the present invention, the analog switch is programmatically adjusted to adjust the increase or decrease of the amplification degree to accurately check the current panel situation to the non-active state instead of the live state. Also, by checking the voltage of the line, the risk of accidents can be reduced.

Through this analog switch-based amplifier circuit, if there is any residual voltage in the non-active state, the CPU always checks it, and the alarm can sound as soon as the panel is opened.

According to an embodiment of the present invention, when detection of a live line is made, a separate amplification circuit may not perform amplification of the integrated input signal, and when detection of a live line is not performed, the input signal through the amplification circuit The detection of the line-to-line voltage can be performed in the non-active line through amplification of the.

According to an embodiment of the present invention, in the wireless live-line alarm method, the wireless live-line alarm device senses an electrical signal in the power device through an antenna to generate an input signal, and the wireless live-line alarm device inputs and / or input signals. It is possible to determine whether to generate an alarm based on the amplified input signal amplified.

The input signal may be a signal for detecting a live line condition, and the amplified input signal may be a signal for detecting a voltage between lines existing in a non-active line condition. In addition, the input signal and / or the amplified input signal is filtered by the filtering unit, and judgment on the line voltage existing in the live state and / or the non-live state is performed based on the filtered input signal and / or the amplified input signal. Can be. The above determination may be performed based on a processor implemented in a wireless live-line warning device.

7 is a conceptual diagram showing the operation of the wireless live-line warning device according to an embodiment of the present invention.

7 discloses a method for amplifying an input signal based on an analog switch that amplifies the input signal with different amplification values.

Referring to FIG. 7, as described above, the first switch is connected to the first feedback resistor to amplify the input signal with the first amplification value. The second switch is connected to the second feedback resistor to amplify the input signal with the second amplification value. The third switch is connected to the third feedback resistor to amplify the input signal with the third amplification value. The fourth switch is connected to the fourth feedback resistor to amplify the input signal with the fourth amplification value.

According to an embodiment of the present invention, the analog switch is an optional operation mode, and the voltage of the line can be checked through amplification. For optimal check, the operation mode is preferentially set to perform amplification. When the voltage of the line is checked, an alarm signal may be generated through an external alarm device (diode-based light emitting unit and speaker) as a case where a voltage value exists even in a non-active state due to the secondary charging phenomenon of the line. .

First, in order to check the line-to-line voltage in the non-active state with the sequential determination mode 700, the input signal is amplified based on the fourth switch connected to the fourth feedback resistor having the lowest fourth amplification value, and the voltage value of the line is adjusted. Can be checked. By using the sequential judgment mode, more accurate judgment can be performed using a low amplification value.

If the voltage of the line is checked based on the fourth amplification value, an alarm for the line voltage may be generated as a case where the voltage value exists even in the non-active state due to the secondary charging phenomenon of the line.

Conversely, when the line voltage is not checked based on the fourth amplification value, the input signal is amplified based on a third switch connected to a third feedback resistor having a third amplification value that is relatively higher than the fourth amplification value. The check for the voltage value of the line can be performed. If the voltage of the line is checked based on the third amplification value, an alarm for the line voltage may be generated as a case where the voltage value exists even in the non-active state due to the secondary charging phenomenon of the line.

In the same way, on the contrary, when the line voltage is not checked based on the third amplification value, the line is amplified from the second switch connected to the second feedback resistor having a second amplification value that is relatively higher than the third amplification value. The voltage value can be checked.

In the sequential determination mode 700, a check for the voltage of the line may be performed by sequentially switching from a low amplification switch to a high amplification switch to the ON state.

According to an embodiment of the present invention, information on the detection switch that detects the line voltage in the above manner is stored, and again, based on the detection switch, judges the line voltage again to determine the presence of the voltage value in the non-active state A jury on whether or not it may be conducted. For example, when a voltage value is detected based on the second switch, and then, when performing a judgment on the line voltage, a switch having an amplification level lower than the amplification level based on the second switch (for example, For the 3 switch and the 4th switch), switching is not performed, and only amplification based on a switch (for example, the first switch) having a higher amplification degree than the amplification degree based on the second switch may be performed.

In addition, according to an embodiment of the present invention, information on amplification of a voltage value in a non-active state is stored as the first quick determination mode 710 and the second quick determination mode 720 after the sequential determination mode 700. It can be used later for switch-based amplification.

First, for n times, as described above, it is possible to obtain information about a switch that continues sensing through amplification through amplification from the fourth switch to the first switch having a low amplification degree. After performing n times of amplification in the sequential determination mode in the non-active line state, the number of times the line voltage is detected can be counted for each switch.

In the first quick determination mode 710, as a result of counting for each switch, the switch having the lowest amplification degree may be reset to the first determination start switch 715. For example, when the line voltage is continuously detected from the second switch in a non-active state in the corresponding device, the second switch may be reset to the first determination start switch 715. In this case, the second switch is set as the first judgment start switch 715 in the corresponding installation place, and based on the second switch, which is the first judgment start switch 715 as the first quick judgment mode from n + 1 times of judgment. Amplification may be performed to determine the line voltage. The first judgment start switch 715 may be set adaptively for each installed position in this manner, and according to the setting of the first judgment start switch 715, quick judgment is performed as a faster judgment mode, but more accurate line voltage is applied. Judgment can be performed.

Alternatively, according to an embodiment of the present invention, the second quick determination mode 720 is used to be set as the second determination start switch 725 for the most counted switch, and the second quick determination mode from n + 1 determinations Amplification based on the second determination start switch 725, which is the most counted switch as 720, may be performed to determine the line voltage.

According to an embodiment of the present invention, the determination of the first quick determination mode 710 or the second quick determination mode 720 may be determined based on the ratio of the most counted switches. If the ratio of the most counted switch exceeds the threshold ratio, it is determined that a certain tendency exists, and the second quick determination mode 720 may be used, and conversely, the ratio of the most counted switch is the threshold ratio If not exceeded, it is determined that a specific tendency does not exist, and the first quick determination mode 710 may be used.

In addition, according to an embodiment of the present invention, when the switches of the first quick determination mode 710 and the second quick determination mode 720 are the same, the first period is set and reset based on the first period so that the sequential determination mode is set. Performed again, the first determination start switch 715 and the second determination start switch 725 may be determined.

If the switches of the first quick judgment mode 710 and the second quick judgment mode 720 are not the same, the second cycle is set to reset to the second cycle reference, and the sequential judgment mode is performed again to start the first judgment switch again. 715 and a second determination start switch 725 may be determined.

8 is a conceptual diagram illustrating a signal noise removing structure according to an embodiment of the present invention.

In FIG. 8, a method for removing a noise component upon input of an amplified input signal to a processor is disclosed.

Referring to FIG. 8, an input signal may be input to the processor as an amplification input signal based on the amplification unit and feedback resistance.

The amplified input signal is a signal including noise, and various noise components may also be inputted when input to the processor.

The amplification input signal input to the processor can remove noise through a low pass filter. When the signal and noise are mixed, it is not easy to completely filter the signal.

Therefore, in an embodiment of the present invention, the filtering unit 800 may be implemented to filter a desired signal by changing a cutoff frequency of a filter for filtering noise. The filter used in the embodiment of the present invention can adaptively adjust the cutoff frequency of the filtering unit 800 by changing the cutoff frequency based on the clock frequency (fclk) 820.

That is, when the clock frequency (fclk) 820 of the filtering unit 800 is 500Khz, the cutoff frequency (fc) becomes 5Khz, and when the clock frequency (fclk) 820 of the filtering unit 800 is 50Khz, the cutoff frequency ( fc) is 500 Hz, when the clock frequency (fclk) 820 of the filtering unit 800 is 5 Khz, the cutoff frequency (fc) is 50 Hz, and the clock frequency (fclk) 820 of the filtering unit 800 is 500 Hz. Since the cutoff frequency fc is 5 Hz, the circuit having the characteristics of the filtering unit of the desired frequency is configured, so that stability and malfunction of the circuit operation can be prevented.

According to an embodiment of the present invention, noise may be changed according to an input signal and an amplification degree. Accordingly, signals for a plurality of clock frequencies are transmitted, and filtering of an input signal based on a plurality of cutoff frequencies can be performed.

For example, when filtering is performed on an input signal or an amplified input signal that has been amplified, filtering values may be stored and used. Initially, the value of the cutoff frequency included in the filtering table may be set as the initial default value. Thereafter, the frequency table may be determined by determining the cutoff frequency fc by varying the clock frequency fclk by variously removing noise for each input signal and amplified input signal of the corresponding device. The frequency table may be changed in a manner of changing the most optimal optimal cutoff frequency from the initial default value to a subsequent default value according to the input signal and the amplification degree of the input signal, and the noise component may be changed according to the change of the optimal cutoff frequency. The filtering effect may be adaptively increased according to the installed position of the wireless live alarm device.

According to an embodiment of the present invention, the default setting of the filtering table may be changed periodically. For example, the default value may be periodically set, such as an initial default value, a first default value, a second default value, and an nth default value, and used as a corresponding default value for a predetermined period.

For example, the first default value is a value that resets the initial default value of the filtering table after finding the optimal cut-off frequency during the first period and may be used for filtering the input signal as the default value during the second period. That is, the first period may be a period in which each amplification input signal according to each amplification degree is input n times or more, and the second period may be a period in which each amplification input signal according to each amplification degree is input n or more times. In the same way, the second default value is a value that resets the initial default value of the filtering table after finding the optimal cut-off frequency during the second period, and can be used for filtering the input signal as the default value during the third period.

That is, the first period, the second period, and the third period may all differ depending on whether or not the amplified input signal is collected, and a period for allowing each amplification input signal according to each amplification degree to be input more than n times Can be Through this method, it is possible to increase the noise filtering effect by resetting the filtering table to reflect the situation where the wireless live alarm device is continuously installed.

According to an embodiment of the present invention, the first period, the second period, and the third period may be set differently according to the sequential determination mode, the first quick determination mode, and the second quick determination mode. For example, in the case of the sequential determination mode, since the amplification input signal according to each amplification degree can be input, each of the amplification input signals according to each amplification degree is n times or more in the first period, the second period, and the third period. It may be set as a period for allowing input. However, in the case of the first quick decision mode and the second quick decision mode, input of an amplification signal according to all amplification levels may not be performed according to the settings of the first decision start switch and the second decision start switch. The second period and the third period may be set as periods for allowing each of the amplification input signals according to the amplification degree according to the settings of the first determination start switch and the second determination start switch to be input more than n times.

According to an embodiment of the present invention, after passing through a default setting of a first threshold number or more, if a value equal to or greater than a second threshold number of times is repeated as a cutoff frequency on the filtering table, the corresponding value is set as the final default value, and thereafter, the corresponding The procedure for determining the cutoff frequency fc by changing the clock frequency fclk for checking the cutoff frequency may not be performed.

The embodiments according to the present invention described above may be implemented in the form of program instructions that can be executed through various computer components and can be recorded in a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the computer-readable recording medium may be specially designed and configured for the present invention or may be known and usable by those skilled in the computer software field. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, and magneto-optical media such as floptical disks. medium), and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes produced by a compiler, but also high-level language codes executable by a computer using an interpreter or the like. The hardware device can be changed to one or more software modules to perform the processing according to the present invention, and vice versa.

In the above, the present invention has been described by specific matters such as specific components and limited examples and drawings, but it is provided to help a more comprehensive understanding of the present invention, and the present invention is not limited to the above embodiments, and Those skilled in the art to which the invention pertains may seek various modifications and changes from these descriptions.

Therefore, the spirit of the present invention is not limited to the above-described embodiment, and should not be determined, and the scope of the spirit of the present invention, as well as the claims to be described later, as well as all ranges that are equivalent to or equivalently changed from the claims. Would belong to

Claims (6)

The wireless live alarm method,
A wireless live wire alarm device detecting an electric signal in the electric device through an antenna to generate an input signal; And
And determining whether the wireless live-line alarm device generates an alarm based on an input signal and an amplified input signal that amplifies the input signal.
The input signal is a signal for detecting a live line condition,
The amplified input signal is a signal for detecting the line voltage existing in the non-active line state,
The input signal and the amplified input signal are filtered and filtered by a filtering unit, and the determination of the line voltage existing in the live and non-active states is performed based on the input signal and the amplified input signal,
The amplification input signal is generated by an amplification circuit,
The amplifying circuit increases the sensitivity to a live line based on the amplified input signal generated by performing amplification step by step based on the feedback resistance of the non-inverting circuit of the input circuit, and performs a line check in a non-active state,
The feedback resistance includes a first feedback resistance, a second feedback resistance, a third feedback resistance and a fourth feedback resistance,
The amplification circuit performs amplification on the input signal by selecting the feedback resistance of the non-inverting circuit based on each of the first analog switch, the second analog switch, the third analog switch, and the fourth analog switch,
The amplification value of the amplification circuit is (1+ amplification resistance value) / (the value of the feedback resistance selected from the first feedback resistance, the second feedback resistance, the third feedback resistance, and the fourth feedback resistance),
The feedback resistance is selected according to the determined mode of the line check in the set non-active line state, characterized in that it is utilized for amplifying the input signal. According to claim 1,
The filtering unit is implemented to filter the desired signal by changing the cutoff frequency of the filter for filtering noise,
The filter adaptively adjusts the cutoff frequency of the filtering unit by changing the cutoff frequency based on the clock frequency,
The filter is performed based on a table storing information on the cutoff frequency,
The table may be determined differently according to the determination mode. According to claim 1,
The judgment mode includes a sequential judgment mode, a first quick judgment mode and a second quick judgment mode,
The sequential determination mode is a mode in which amplification is performed by performing amplification from a relatively low amplification value to a relatively high amplification value, and the fourth feedback resistance, the third feedback resistance, the second feedback resistance, and the first feedback resistance Sequential amplification in order,
In the first quick determination mode, the switch having the lowest amplification degree among the switches detecting the line voltage is reset to the first determination start switch based on the counting information for the switch detecting the line voltage, and judgment is performed.
The second quick determination mode is characterized by resetting the switch detecting the line voltage having the largest counting value to a second determination switch based on the counting information for the switch detecting the line voltage. How to. Wireless live alarm system
An antenna implemented to sense an electrical signal in the electrical device and generate an input signal; And
And a processor implemented to determine whether to generate an alarm based on an input signal and an amplified input signal that amplifies the input signal.
The input signal is a signal for detecting a live line condition,
The amplified input signal is a signal for detecting the line voltage existing in the non-active line state,
The input signal and the amplified input signal are filtered and filtered by a filtering unit, and the determination of the line voltage existing in the live and non-active states is performed based on the input signal and the amplified input signal,
The amplification input signal is generated by an amplification circuit,
The amplifying circuit increases the sensitivity to a live line based on the amplified input signal generated by performing amplification step by step based on the feedback resistance of the non-inverting circuit of the input circuit, and performs a line check in a non-active state,
The feedback resistance includes a first feedback resistance, a second feedback resistance, a third feedback resistance and a fourth feedback resistance,
The amplification circuit performs amplification on the input signal by selecting the feedback resistance of the non-inverting circuit based on each of the first analog switch, the second analog switch, the third analog switch, and the fourth analog switch,
The amplification value of the amplification circuit is (1+ amplification resistance value) / (the value of the feedback resistance selected from the first feedback resistance, the second feedback resistance, the third feedback resistance, and the fourth feedback resistance),
The feedback resistance is a wireless live wire alarm device, characterized in that the line check of the set non-active wire state is selected according to a judgment mode and utilized for amplifying the input signal. The method of claim 4,
The filtering unit is implemented to filter the desired signal by changing the cutoff frequency of the filter for filtering noise,
The filter adaptively adjusts the cutoff frequency of the filtering unit by changing the cutoff frequency based on the clock frequency,
The filter is performed based on a table storing information on the cutoff frequency,
The table is determined differently according to the determination mode, the wireless live-line alarm device. The method of claim 4,
The judgment mode includes a sequential judgment mode, a first quick judgment mode and a second quick judgment mode,
The sequential determination mode is a mode in which amplification is performed by performing amplification from a relatively low amplification value to a relatively high amplification value, and the fourth feedback resistance, the third feedback resistance, the second feedback resistance, and the first feedback resistance Sequential amplification in order,
In the first quick determination mode, the switch having the lowest amplification degree among the switches detecting the line voltage is reset to the first determination start switch based on the counting information for the switch detecting the line voltage, and judgment is performed.
The second quick determination mode is characterized by resetting the switch detecting the line voltage having the largest counting value to a second determination switch based on the counting information for the switch detecting the line voltage. Wireless type live-line alarm device.

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