WO2013170638A1

WO2013170638A1 - Method and device of detection and processing for striking fire of line

Info

Publication number: WO2013170638A1
Application number: PCT/CN2013/070008
Authority: WO
Inventors: 董右云
Original assignee: Dong Youyun
Priority date: 2012-05-15
Filing date: 2013-01-04
Publication date: 2013-11-21
Also published as: CN102684138A

Abstract

A method and device of detection and processing for striking fire of line, the method comprising the steps of: detecting step (11), measuring the change of the line current and the circuit terminal voltage by sensor; judging step (12), inputting said value of measuring to processor by microprocessor and logic algorithm, processing the change of the line current or the voltage, and determining whether the current or voltage change caused by the fire; execution step (13), if there is firing, microprocessor sends control signal, controls actuator to disconnect the line by wired or wireless mode, and / or sends alarm signal of firing; if there is no firing, the line continues. The method can detect the happening of firing before firing or the firing moment, and cut the line power to avoid circuit sparking caused by fire accident.

Description

Electric line ignition detection and processing method and device thereof

Technical field

The invention relates to a method and device for detecting and processing sparks by electric lines.

Background technique

When the line is aging or overloaded, the fire caused by the short-circuit phenomenon may occur. According to the statistics of the fire department, the fire caused by the aging of the line or the ignition caused by the fire accounts for 15-20% of the total fire, causing significant personnel or property. loss. People have long wanted to find a solution that can effectively detect or avoid the occurrence of fire when there is a change in current or voltage due to aging or overloading of the line, and there is no effective solution.

Summary of the invention

In order to overcome the above problems, the present invention provides a method for detecting and processing a fire line of a power line which can effectively and quickly identify a line sparking phenomenon and cut off the power source in time.

Another object of the present invention is to provide a society with a fire detection and processing device for electrical wiring.

The technical solution of the present invention provides a method for detecting and processing sparks by using electric lines, which includes the following steps.

(11) a detecting step of measuring a change in the current of the electric line or a change in the voltage at the rear end of the line by the sensor device;

(12), judging step, inputting the above measured value into the processor, and processing the line current or the voltage change amount through the microprocessor combined with the logic algorithm to determine whether the current or voltage change caused by the non-sparking is caused by the ignition or the ignition Current or voltage change;

(13), the implementation steps, if there is a sparking phenomenon, the microprocessor immediately sends a control signal to control the actuator to disconnect the line by wired or wireless means, and / or send a line fire alarm signal; if there is no fire Phenomenon, continue to run on the power line.

As a modification of the present invention, the present invention further includes a determining step 14 of whether or not the electrical line is disconnected, the determining step is to connect the optocoupler and the resistor with respect to the neutral line at the live line output end of the line actuator, and the microprocessor detects the resistance on the two Whether there is a voltage drop at the end, if there is no voltage drop, it means that the power line has been disconnected, otherwise the power line is not disconnected.

In the present invention, the predetermined time is 1-60 seconds.

In the present invention, the predetermined number of times is 5 to 200 times.

In the present invention, the actuator is a line breaking device.

The invention also provides an electric line ignition detecting and processing device, comprising

(1) The power supply circuit supplies power to the microprocessor and the analysis control circuit;

(2), current or voltage acquisition circuit, current or voltage acquisition circuit provides the microprocessor with real-time change value of current or voltage, for microprocessor processing to process the measured value according to the logic algorithm;

(3) a line drive control circuit for driving the actuator;

(4), The microprocessor determines the actual occurrence of the line sparking phenomenon through the logic algorithm to determine whether the line voltage or current is collected. If there is a sparking phenomenon, the line breaking device is controlled to cut off the line connection and/or issue an alarm in time. prompt.

The invention further comprises a judging device for determining whether the electric circuit is disconnected, and the judging device is configured to connect the optocoupler and the resistor with respect to the neutral line at the live line output end of the line actuator, and the microprocessor detects whether there is a voltage drop at both ends of the resistor, if No voltage drop means that the power line has been disconnected, otherwise the power line is not disconnected.

The logic algorithm in the method and device of the present invention is: when a fire occurs on a power line, a current or a voltage flowing through the power line changes, and each oscillation interval has a highest value and a minimum value. The current value or voltage value is sampled every predetermined sampling time. The method of obtaining the highest value is: the continuous sampling value rises, when the first value decreases, the previous value is the highest value; the lowest value is obtained by The sample value decreases continuously. When the first rising value occurs, the previous sample value is the lowest value; the difference between the highest value and the lowest value is divided by the highest value, and when the result is greater than or equal to 0.3, the record is once, every predetermined time. During the time, when the cumulative number of records reaches a predetermined number of times, it is judged that the line has a sparking phenomenon; otherwise, there is no sparking phenomenon.

The invention can detect the occurrence of the phenomenon in time before the ignition of the electric line occurs or when the fire is fired, and effectively cut off the line power supply, and issue an alarm, so that the line maintenance personnel can timely and accurately repair, Eliminate accidents caused by fires caused by fire on the line.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing the structure of the method of the present invention.

2 is a schematic diagram of the principle of an embodiment of the present invention.

Figure 3 is a schematic illustration of another embodiment of the present invention.

detailed description

Please refer to FIG. 1. FIG. 1 discloses a method for detecting and processing sparks on an electric line, including the following steps.

The invention further includes a determining step (14) of whether or not the electrical line is disconnected, the determining step is to connect the optocoupler and the resistor with respect to the neutral line at the live line output end of the line actuator, and the microprocessor detects whether there is pressure on both ends of the resistor. If there is no voltage drop, the power line has been disconnected, otherwise the power line is not disconnected.

In the present invention, the logic algorithm is: when a fire occurs on the power line, the current or voltage flowing through the power line changes, and each oscillation interval has a highest value and a minimum value, every predetermined sampling. Time (1-3 milliseconds) samples the current value or voltage value. The method of obtaining the highest value is: the continuous sampling value rises, when the first value decreases, the previous value is the highest value; the lowest value is obtained by When the sample value decreases continuously, when the first rising value occurs, the previous sample value is the lowest value; the difference between the highest value and the lowest value is divided by the highest value, and when the result is greater than or equal to 0.3, the record is once, at each time. Within a predetermined time period (the predetermined time is 1-60 seconds), the cumulative number of records reaches a predetermined number of times (the predetermined number of times is 5-200 times), and it is judged that the line has a sparking phenomenon; otherwise, there is no sparking phenomenon.

Referring to FIG. 2, FIG. 2 is a device for detecting and processing sparks on an electric line, including,

1. The power supply circuit 100 provides power to the microprocessor and the analysis control circuit. In the embodiment, the power supply circuit is composed of a power conversion circuit and a system supply circuit, and the power conversion circuit converts the alternating current into direct current and is powered by the system. After constant flow and constant pressure, it is provided to the system for use;

2. A current or voltage acquisition circuit 200, the current or voltage acquisition circuit provides a real-time change in current or voltage to the microprocessor for processing by the microprocessor to process the measured value according to a logic algorithm, in the embodiment shown in FIG. The current or voltage collecting circuit 200 draws only the current collecting circuit 200, and the related voltage collecting circuit 200 is specifically described in FIG.

3, a line drive control circuit 300 for driving the actuator 400;

4, The microprocessor 500 determines whether there is a real line sparking phenomenon through a logic algorithm for the collected value of the voltage or current of the electric line. If a sparking phenomenon occurs, the line breaking device is controlled to cut off the line connection and/or issue in time. The alarm prompts the alarm prompts as sound, light or display.

The present invention also includes a judging device 600 for determining whether or not the electric circuit is disconnected. The judging device 600 is coupled to the optocoupler and the resistor at the live line output end of the line actuator 400, and the microprocessor 500 detects whether there are two ends of the resistor. The voltage drop, if there is no voltage drop, indicates that the power line has been disconnected, otherwise the power line is not disconnected. In this embodiment, an indicator light 700 is further included to indicate the working state of the present invention; and a manual switch circuit 800 is configured to manually cut off the circuit in an emergency state.

Please refer to FIG. 3. FIG. 3 is a schematic diagram of another embodiment of the present invention. The embodiment shown in FIG. 3 has the same general structure as the embodiment shown in FIG. 2, and the difference is the embodiment of determining whether the line is ignited by collecting voltage as shown in FIG. 3, and the manner of transmitting the signal. For wireless mode, a communication connection is used. Specifically, the electric line ignition detecting and processing apparatus disclosed in the embodiment shown in FIG. 3 includes,

2. Current or voltage acquisition circuit 200, the current or voltage acquisition circuit provides a real-time change of current or voltage to the microprocessor for processing by the microprocessor to process the measured value according to a logic algorithm, in the embodiment shown in FIG. The current or voltage collecting circuit 200 is drawn by the voltage collecting circuit 200;

3, The line drive control circuit 300 is used for wireless communication mode, such as R485 or other communication mode to drive the actuator 400;

The logic algorithm in the device is: when a fire occurs on the power line, the current or voltage flowing through the power line changes, and each oscillation interval has a highest value and a minimum value, every predetermined sampling. Time sampling the current value or voltage value, the method of obtaining the highest value is: the continuous sampling value rises, when the first value decreases, the previous value is the highest value; the lowest value is obtained when the sampling value continuously decreases. When the first rising value occurs, the previous sample value is the lowest value; the difference between the highest value and the lowest value is divided by the highest value, and when the result is greater than or equal to 0.3, the record is recorded once every predetermined time. When the cumulative number of times reaches the predetermined number of times, it is judged that the line has a sparking phenomenon; otherwise, there is no sparking phenomenon.

The invention can detect the occurrence of the phenomenon in time before the ignition of the electric line occurs or when the fire is fired, and effectively cut off the line power supply, and issue an alarm, so that the line maintenance personnel can timely and accurately repair and eliminate the cause. The line was ignited and caused a fire. It can greatly reduce the accident caused by the fire on the line.

In the present invention, the line breaking device 400 may be a control type air switch, a circuit breaker, an automatic reclosing switch, a frequency converter, a relay, an AC contactor, a thyristor, a photoelectric solid relay, an insulated gate bipolar transistor ( One of IGBT) or a metallized semiconductor field effect transistor (MOSFET).

Claims

1. A method for detecting and processing sparks by using electric lines, characterized in that: the following steps are included,

2. The method for detecting and processing sparks by electric lines according to claim 1, wherein: The method further includes a determining step (14) of determining whether the power line is disconnected, wherein the determining step is to connect the optocoupler and the resistor to the neutral line of the line actuator, and the microprocessor detects whether there is a voltage drop at both ends of the resistor. If there is no voltage drop, it means that the power line has been disconnected, otherwise the power line is not disconnected.

3, The method for detecting and processing sparks by electric lines according to claim 1 or 2, wherein the logic algorithm is: when a spark occurs on the electric line, the current or voltage flowing through the electric line is oscillated. Change, each oscillation interval has a highest value and a minimum value, and the current value or voltage value is sampled every predetermined sampling time. The method of obtaining the highest value is: the continuous sampling value rises, when the first value decreases, The former value is the highest value; the lowest value is obtained by continuously decreasing the sample value, when the first rising value occurs, the previous sample value is the lowest value; dividing the difference between the highest value and the lowest value by the highest value When the result is greater than or equal to 0.3, the recording is once. When the cumulative number of recordings reaches a predetermined number of times every predetermined time, it is judged that the line has a sparking phenomenon; otherwise, there is no sparking phenomenon.

4. The method of detecting and processing a live line spark according to claim 3, wherein the predetermined sampling time is 1-3 milliseconds.

5. The method according to claim 4, wherein the predetermined time is 1-60 seconds.

6. The method of detecting and processing sparks by an electric line according to claim 5, wherein the predetermined number of times is 5 to 200 times.

7. The method according to claim 5, wherein the actuator is a line breaking device.

8. A device for detecting and processing sparks on an electric line, characterized in that:

(3) a line drive control circuit for driving the actuator;

9, The electric line ignition detecting and processing apparatus according to claim 8, further comprising: judging means for dividing the electric line by means of judging that the apparatus is optically coupled to the zero line at the live line output end of the line actuator; And the resistor, the microprocessor detects whether there is a voltage drop at both ends of the resistor. If there is no voltage drop, the power line has been disconnected, otherwise the power line is not disconnected.

10. The electric line ignition detecting and processing apparatus according to claim 8, wherein: The logic algorithm is: when a fire occurs on the power line, the current or voltage flowing through the power line changes, and each oscillation interval has a highest value and a minimum value, and the current is sampled every predetermined sampling time. The value or voltage value, the method to obtain the highest value is: the continuous sample value rises, when the first value decreases, the previous value is the highest value; the lowest value is obtained when the sample value decreases continuously, when the first When a rising value, the previous sampling value is the lowest value; the difference between the highest value and the lowest value is divided by the highest value, and when the result is greater than or equal to 0.3, the recording is once, and the recording cumulative number reaches the predetermined time every predetermined time. The number of times determines that there is a spark on the line; otherwise, there is no sparking phenomenon.