KR100361595B1 - Black box System for looking out electric fire - Google Patents

Abstract

The present invention relates to an electric fire identification black box system adapted to the reality of the consumer for the prevention of fire and various accidents and identification of the exact cause of the accident.

On the other hand, the present invention is installed in the distribution panel of the facility and includes a black box means for sensing the voltage and current of electricity passing through the distribution panel and the temperature therein, the black box means is a voltage and current and temperature data Memory means for recording and storing the data; and data transmission means for transmitting the data stored in the memory means to a predetermined terminal device. In addition, the present invention system receives the data transmitted from the data transmission means, and if there is an error in the received data, the person concerned, such as safety managers and fire departments recognize the contents of the abnormal data through wired or wireless communication means. Characterized in that it comprises a terminal device for notification so that you can.

Description

Black box system for electric fire identification

The present invention relates to a black box system for electric fire sensitization, and more particularly to a black box system for electric fire sensitization that is suitable for the reality of the consumer for the prevention of fire and various accidents caused by electricity and the exact cause of the accident. will be.

On the other hand, the present invention is installed in the distribution panel of the facility and includes a black box means for sensing the voltage and current of electricity passing through the distribution panel and the temperature therein, the black box means is a voltage and current and temperature data Memory means for recording and storing the data; and data transmission means for transmitting the data stored in the memory means to a predetermined terminal device. In addition, the present invention system receives the data transmitted from the data transmission means, and if there is an error in the received data, the person concerned, such as safety managers and fire departments recognize the contents of the abnormal data through wired or wireless communication means. It is configured to include a terminal device for notifying.

Electric accidents are not only damage to life and property, but also damage caused by lower reliability of communication equipment for information industry. CIM (Computer Integrated) is provided with the ability to diagnose, judge, and choose to effectively cope with disasters that vary according to environment such as time and place. It is necessary to implement electric fire accident prevention and minimization of disaster scale by operating data recording device for electric power at each time point that enables real time processing of abnormal condition by introducing Manufacturing.

According to this necessity, one-chip microcomputer automation system that processes, controls, and stores collected information is inevitably emerged. This collects and analyzes all necessary data to store and record the decision-making process necessary for production and management such as risk discovery. In addition, it is necessary to develop a system that can analyze the cause and develop a monitoring system that can solve the problem based on expert judgment of quantitative data.

In particular, the disaster caused by the use of electric energy is caused by the interruption of the power supply, such as the interruption of the production process and the stop of the communication equipment. Fundamental technology development to improve safety management factors through analysis and analysis should be made, and the development of black box for electric fire identification is needed to analyze the cause of electric fire and to improve preventive technology.

The current state of the world's related technologies for the black box for electric fire identification is as follows.

Europe

In Europe, remote monitoring facilities for electric facilities have been put into practice, and the purpose of monitoring is to control the peak time of electric heaters, remote control of public facilities and road lighting. In the UK, ripple control, high frequency signal, and cycle control are used to adjust the peak time of electric heaters. In France, remote monitoring and control are also used for electric heaters, public facilities, and road lighting. Ripple control method is adopted in other facilities. Sweden, Switzerland and Finland also control remote monitoring of electrical facilities by PLC (Power Line Carrier) method or Ripple Control System in electric heaters, washing machines, street lamps and pumps.

2. United States

In the United States, electric monitoring, air conditioning, irrigation pumps, distribution line automation, and dryer alarm systems are applied to the remote monitoring and control technology of electrical facilities by using various methods such as wireless, PLC, ripple, and telephone. Westinghouse developed and put into practical use a method of remotely measuring gas generated in transformer oil and noise generated during operation.In this regard, TMS (Transformer Monitoring System) was developed to monitor various abnormal conditions generated from power transformers. The status can be monitored by a computer.

3. Japan

end. Distribution Automation Status of Electric Power Company

In Japan, remote monitoring and control systems for electric facilities are being distributed mainly by electric companies, and the development of remote monitoring devices for electrical safety management has been promoted and put into practical use. The distribution automation fields that are being used in Japanese power companies are as follows.

-Remote control system to control the opening and closing of line switchgear

-Remote automatic meter reading system of power consumption

-Automation system for distribution management such as measuring feeder feeder current, measuring high voltage line voltage, and detecting fault points

52 shows a state of employment of a remote monitoring device for electrical safety management.

4. Domestic

end. KEPCO

SCADA (Supervisory Control and Data Acquisition) to achieve the goal of supplying high-quality electric power to customers stably and economically by operating electric power system efficiently in response to the rapid increase in electric power demand, complexity of various industrial facilities, and increasing size. The system is being developed and utilized.

This system is a data communication system that collects and monitors various data generated from the power system and transmits them to the central monitoring board. Currently operating fields are applied to centralized feed automation, regional feed automation, water system automation, and distribution automation.

I. Korea Telecom

A remote automatic meter reading system has been developed and piloted in some new apartment complexes. This system is a system for the automatic meter reading of the meter (electric, water, gas) usage of various customers without the door-to-door visit of the meter reader by the public communication network.

In addition, the automatic meter reading system has been developed not only for meter reading but also energy and energy management technologies such as electricity and gas. Recently, with the development of computer technology, it has been used for air pollution, meteorological observation system, and security / alarm system.

The contents of the general electrical fire are as follows.

1. Electrical Fire Analysis in 1997

Of the 29,472 fires that occurred in 1997, 10,075 cases were generated by electricity, with a 34.2% share. Compared with the previous year, it was 0.7% lower, and it was 4.9% lower than 39.1% of 1994, which is an average of 27.6 electric fires per day.

In addition, 348 people were killed, 75 people died 28.6% less than the previous year, and 273 people were injured 16.5% less. On average, one person died or was injured by electric fire.

Property damages amounting to KRW 52,628 million increased 2.5% from the previous year. This is an average daily loss amounting to KRW 144 million due to electric fires, which is increasing every year as the fire gradually increases. The contents of the 1997 electrical fire analysis are shown in FIG. 37.

2. Ten Years of Electric Fires

The occurrence of electric fires from 1988 to 1997 was 10,075, which was 2.6 times higher in 1997 compared to 3,803 in 1988, as shown in Table 2 below.

The share of electric fires also increased from 30.4% in 1988 to 34.2% in 1997, up 3.8% .However, in recent four years, the share of electric fires in total fires has gradually decreased due to various efforts to prevent electric fires. appear.

38 shows the current state of electric fire in the last 10 years.

3. Ten Years of Electric Fires

Looking at the causes of electric fire ignition in the last 10 years, it is found that fires caused by short circuits occupy the water level every year, and fires caused by overload are also increasing.

The distribution of causes by cause is compared with the capacity and facilities at the time of new construction, and various devices have recently increased in size and capacity, and are analyzed as a result of the inadequate replacement of old equipment.

39 shows the occurrence distribution by the cause of the electric fire.

4. Status of Electric Fires by Location

In 1997, 3,082 cases (30.6%) occurred in general houses and apartments, which are the basis of residential life, 1,485 cases (14.7%) and 1,149 cases (11.4%) of automobile fires occurred in factories and workplaces.

When fire breaks out in restaurants, more than half of them are represented by electric fires. In particular, more than 40% of all fires in stores, schools, and markets are caused by electricity.

40 shows the occurrence of electric fires by place.

The following is a look at the electrical equipment accident statistics.

1. Monthly Equipment Accidents

Electrical equipment accidents were 1,196 cases, which is 34.2% of the yearly accidents in June-August, when there are heavy typhoons and high temperature and humidity, which is 1.4 times the monthly average rate.

The reason for many accidents in the summer is that it is not easy to dissipate heat generated by electric equipment due to high ambient temperature, and it is due to natural deterioration due to moisture or moisture and abnormal voltage due to typhoon or lightning.

To prevent this, outdoor facilities should be converted to indoor or closed type, and regular inspections should be strengthened. Fig. 41 shows the monthly distribution of facility accidents.

2. Status of Electric Fires by Hours

881 equipment accidents occurred between 8 am and 10 am, the start-up time period for electric equipment, accounting for 25.2%, three times higher than the average accident rate of 8.3%.

As such, the concentration of accidents during start-up time is analyzed to be caused by an impact caused by overvoltage or inrush current caused by a transient phenomenon occurring during operation of a cable line or a device.

2,355 cases (67.3%) occurred from 8:00 am to 6:00 pm, which is a heavy use of electrical equipment, and most of the accidents occurred during the same time period. The incidence of accidents is shown. 42 shows the distribution of equipment accidents by time in 1997.

3. Status of Equipment Accidents by Accident Equipment

2,039 cases (58.3%) occurred in the low pressure facilities and 1,459 cases (41.7%) occurred in the high and special high pressure facilities. Figure 43 shows the distribution of high and low pressure accident equipment in 1997.

4. Status of Equipment Accidents by Cause of Accident

Most of electrical equipment accidents were caused by electrical phenomena and 1,121 natural deterioration accidents caused by long-term use of electrical equipment accounted for 32.0% of the total equipment accidents. In addition, 376 (10.7%) accidents occurred due to overload.

In addition, there were 544 accidents caused by the destruction of insulation due to natural phenomena such as flood, moisture, wind, snow, lightning, etc., which means that protection measures are required to meet the characteristics of each facility and the surrounding environment.

The number of accidents caused by defects in the facility itself was only 2.9% of total accidents, or 258 accidents due to user's mistake or inadequate operation. Fig. 44 shows the distribution of accident causes in 1997.

5. Status of Equipment Accidents by Accident Type

In terms of accidents caused by electrical equipment, the number of accidents caused by damage and damage to electrical equipment was the highest at 802 cases (22.9%), and 480 accidents caused by the operation of protective devices such as simple circuit breakers rather than the impact of other equipment. (13.7%) occurred.

When an abnormality occurs in the electrical equipment, the circuit breakers, fuses, etc., operate to protect the equipment or life. However, some protective devices do not perform protective actions, or may be operated after a breakdown or accident of electrical equipment, and various breakers, etc. should be inspected from time to time to replace defective facilities. 45 shows the distribution according to the accident type in 1997.

The current state of electrical disasters in foreign countries is as follows.

1. Comparison of Electric Disasters by Year

In 1995, Japan's share of electric fires was 10.9%, and Taiwan's share was 21.8% in the same year, but Korea's 35.7% was 3.3 times that of Japan and 1.6 times that of Taiwan. 46 shows the electric fire occupancy trend for each year.

2. American Electric Fire

According to the annual reports of NFIRS and NFPA, there were 451,070 fires in residential buildings in the United States in 1994 and 151,768 fires in non-residential buildings, resulting in a total of 602,838 fires in buildings.

In terms of ignition sources, electrical equipment accounted for 10% (60,416 cases) and OA and home appliances (43,938 cases) accounted for 7.3%, indicating that the ignition rate of electrical devices was 17.3%. 47 shows the distribution of building fires in the United States by the NFIRS and NFPA survey report.

3. Electric Fires in Japan

The total number of fires in Japan has decreased by 359 in the last 10 years, down by 0.6%, while the number of electric fires has increased by 1,198 and the share of electric fires has also increased by 2.0%. Fig. 48 shows the distribution of electric fires in Japan in the last ten years by the Japan Fire Agency and the Fire Yearbook.

4. Current Status of Large Fires in the UK

In 1996, there were 448 large fires that resulted in property losses or casualties of over 50,000 pounds in the UK, 91 of which were electrical fires (20.3%).

In the ignition source of electric fire, 14 cases (15.4%) occurred in electric wiring, 6 cases (6.6%) in electric lighting, and 4 cases (4.4%) in electric heater.

Ignition sites were 27 (29.7%) in factories and workplaces, 11 (12.1%) in markets and shops, 10 complexes (11.0%), 8 in detached houses and apartments (8.8%) and 8 in farms (8.8%) occurred. 49 shows the distribution of electrical fires in the UK by year by the British Fire Protection Association (FPA).

The present invention was devised to solve the problems that may occur when the above is based on the above-described contents, and an object of the present invention is to prevent the fire and various accidents caused by electricity and to determine the exact cause in case of an accident so as to be suitable for reality. The present invention provides a black box system for identifying an electric fire.

1 is a block diagram of a black box system for electric fire identification according to the present invention.

Figure 2 is a black box block diagram of the present invention.

3 is a conceptual diagram for the development of the analysis software according to the present invention.

Figure 4 is an internal structure diagram of a one-chip microcontroller applied to the present invention.

Figure 5 is a block diagram of a one-chip microcontroller applied to the present invention.

6 is a memory structure diagram applied to the present invention.

Figure 7 is a timer and event configuration of the present invention.

8 is a block diagram of a clock generation of the present invention.

9 is a conceptual diagram of the transmission command of the present invention.

10 is a flash memory block diagram of the present invention.

11 is a schematic view of the structure of the Am29F040B flash memory according to the present invention.

Fig. 12 is a first embodiment of a flash memory initial program algorithm to which the present invention is applied.

Fig. 13 is a second embodiment of a flash memory initialization program algorithm applied to the present invention.

Fig. 14 is an embodiment diagram of a data carrying algorithm of the present invention.

Fig. 15 illustrates an embodiment of the Am29f040B toggle bit algorithm of the present invention.

Fig. 16 is a timing diagram of a switch waveform of the present invention.

17 is a chip / sector erasing timing diagram of an AC waveform of the present invention.

18 is a CES1200 main circuit diagram of the present invention.

19 is a black box block diagram of the present invention.

20 is a waveform diagram of voltage and current detection parameters of the present invention.

21 is a black box main circuit diagram of the present invention.

22 is a black box communication interface detection circuit diagram of the present invention.

Figure 23 is a black box memory board circuit diagram of the present invention.

24 is an embodiment of a black box main circuit algorithm of the present invention.

25 is an embodiment of a black box memory control algorithm of the present invention.

Fig. 26 is an embodiment diagram of the analysis software algorithm of the present invention.

Fig. 27 is an embodiment of an analysis software initial screen of the present invention.

Fig. 28 is an embodiment of an analysis software communication setting screen of the present invention.

29 is an embodiment of a software reception screen for analysis of the present invention.

30 is an embodiment diagram of a data reception completion screen of the present invention;

Fig. 31 is an embodiment diagram of a program end screen of the present invention;

Figure 32 illustrates one embodiment of a memory text file of the present invention.

33 is an embodiment of a power input synchronous signal waveform of the present invention.

34 is an embodiment of the input signal and reference comparison signal waveforms of the present invention.

Fig. 35 is an embodiment diagram of a memory communication signal and a write signal waveform of the present invention.

36 is an embodiment diagram of a memory signal magnification waveform of the present invention.

37 is a table of 97 electrical fire analysis.

38 is a table showing the current state of electrical fires in the last 10 years.

39 is the occurrence distribution by electric fire cause.

40 is an electric fire occurrence status table for each place.

Fig. 41 is a table of monthly accidents of facility accident.

42 is an hourly distribution table of electrical fires in 1997.

Figure 43 is a distribution table according to the 97 high pressure low pressure accident apparatus.

Fig. 44 is the distribution table for the causes of accidents in 1997.

Fig. 45 is a distribution table by accident type in 1997.

46 is a table of electric fire share by year of each country.

47 is a distribution table of causes of building fires in the United States.

48 is an electrical fire distribution table of Japan for the last ten years.

Figure 49 UK electric fire distribution by year

50 is an address address table corresponding to 29F040B sector.

51 is a black box memory sector scheme

52 is a state table of the remote monitoring device adoption for electrical safety management.

Electric fire identification black box system according to the present invention for achieving the above object,

In the black box system for electric fire identification for the cause analysis and prevention of electric fire,

It is installed in the distribution panel of the facility, and includes a black box means for detecting the voltage and current of electricity passing through the distribution panel and the temperature therein,

The black box means,

Memory means for recording and storing the voltage, current, and temperature data;

And data transmission means for transmitting the data stored in the memory means to the following terminal apparatus.

Receiving the data transmitted from the data transmission means, and if there is an error in the received data through a wired or wireless communication means the terminal device for notifying the relevant parties, such as safety managers and fire departments to recognize the contents of the abnormal data Its features are included.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the black box system for electric fire identification according to the present invention.

Technology Development Contents and Scope

Section 1 Contents of Technology Development

This system saves data to prevent fire and various accidents caused by electricity, and saves data to identify the exact cause in case of an accident, and transmits data to prevent electric fires or other fires in advance. We will develop analytical s / w that can analyze data in the ROM of a black box so that the cause of fire can be presented in case of fire.

Ultra low power control device

-Low current consumption below 40㎃

-Storage of data on voltage, current, and temperature at each point of time using one chip microcomputer

-Optimum Sampling Time According to Detection Parameter

Compact and lightweight system

Minimize tolerances on detection parameter values

Analytical S / W Development

-Model design according to system specification

-Test file and graphic processing according to detection condition

-Select condition menu

-Development of control method according to expected data result

Section 2. Scope of Technology Development

In terms of the system configuration, it detects the voltage, current, and temperature of the distribution panel of each building, records it in the internal ROM of the black box, and informs the stored data to the main device. The manager, fire department, site manager, and emergency service personnel will be notified to hand phones, pagers, and general telephones to prevent electrical fires. 1 is an overall system configuration of the present invention, Figure 2 is a black box block diagram of the present invention, Figure 3 is an analysis S / W development of the present invention.

Section 3. Basic Theory of One-Chip Microcontrollers

The origin of the one-chip microcontroller was Intel's i8048 (MCS-48) in 1976: an 8-bit CPU, 1K bytes of mask ROM, 64 bytes of RAM, three sets of 8-bit parallel I / O ports, a timer / counter, one Interrupt inputs, two tester inputs, and register banks switched by interrupts are built into the 40-pin DIP type. Figure 4 shows the internal structure of the AT89C51.

The AT89C51 is a 40-pin DIP, a very convenient one-chip microcontroller with an electronically erasable / rewritable EEPROM, 32 I / O pins, an oscillator circuit, a reset circuit, and a 16-bit timer / counter. In addition, since the operating power supply range is wide from 2.7V to 6V, and the current consumption can be suppressed to about 60μA, it can be driven by a battery and there is no need to manufacture a power supply circuit separately.

1. Hardware of One-Chip Microcontroller

The block diagram of the internal configuration of the one-chip microcontroller is shown in Fig. 5, and its main configuration consists of arithmetic unit (ALU), accumulator (Acc), program memory, data memory, input / output, interrupt, clock and timing circuit. 5 is a block diagram of the one-chip microcontroller of the present invention.

In the internal configuration of the one-chip microcontroller, a command decoder stores an operation code of each program command and converts the operation code into an output for controlling the function of each block of the operation unit.

Arithmetic logic units execute 8-bit data loaded from memory or registers under the control of an instruction decoder. Stores the operation code of each program command.

The accumulator is the single most important data register in the processor, and it can be a single source of data to the ALU or accept the results from the ALU. It also exchanges data with memory or I / O ports.

The memory structure of the one-chip microcontroller has two regions independent of the program memory and the data memory as shown in FIG.

The program status word (PSW) register is 8 bits, and in general-purpose CPUs, if there is no zero flag among PSWs, the condition jump instruction JNZ instruction or JZ instruction is not executed by the zero flag and determines where to jump according to the contents of the A register. do.

Interrupts in one-chip microcontrollers include some kind of externally generated signal on the INT pin and a timer interrupt by a one-chip timer. 7 shows the configuration of a timer and an event counter.

The one-chip microcontroller used in this experiment has 32 input and output ports, and consists of 8-bit bidirectional I / O ports. A reset input is required to initialize the processor, and must be reset after power up, and the processor internally initializes it when it is reset.

Clock and timing circuits are needed to generate a clock to perform commands inside the chip. Typically, a crystal oscillator with high frequency stability is connected to the X1 and X2 pins. A clock is generated internally even if a ceramic oscillator or simply L, C is applied to both pins as an oscillator. The oscillation frequency is usually 1-11MHz, and pin X2 corresponds to the output stage of the crystal oscillator. 8 corresponds to a clock generation block diagram and an instruction cycle timing diagram in the case of a 1-byte, 2-cycle instruction.

2. Transfer Command of One-Chip Microcontroller

Most one-chip microcontroller instructions are mostly one-byte OP codes, and are two-byte instructions consisting of "OP coat" + "operland".

9 is a block diagram showing internal block-by-block transmission commands.

Section 4 Flash Memory Structure and Basic Theory

Am29F040B Flash Memory General Specifications

The Am29F040B is a 4Mbit flash memory designed to store up to 524,288Kbytes in 8 bits at a single power supply of 5V. 512KBytes are divided into 8 sectors of 64Kbytes and each sector can be easily written and erased.

The memory used in this system is designed to be programmed on a standard system with a 5V (Vcc) power supply. Up to 12V (Vpp) is not required to write and erase like other EPROMs. In addition, the Am29F040B has access times of 55nS, 70nS, 90nS, and 120nS, and the access time is faster and cheaper than other memories. 10 shows a block diagram of Am29F040B.

2. Flash Memory Pin Structure

Pin types of Am29F040B flash memory are available in standard 32-Pin PDIP, 32-Pin PLCC, and 32-Pin TSOP Package. In this study, 32-Pin PLCC type was used. 11 shows four types of flash memory: A0 ~ A18 pins are address input ports, DQ0 ~ DQ7 pins are data input / output ports, / CE pin is Chip Enable port, / OE pin is Output Enable port, / WE pin is Write Enable port Corresponds to

2. Initial Programming Algorithms

12 to 15 correspond to a control algorithm from a program initialization of the Am29F040B flash memory to a process of writing and erasing data.

3. Flash Memory Programming Time Chart

16 and 17 correspond to time charts appearing in the program process of the flash memory.

III. Black box development

Section 1 Analysis of Existing Systems

18 is a CES1200 main circuit diagram. The internal components of the existing system, CES1200, consist of CES1200 PCB, Select PCB, Display PCB, and power transformer. The main circuit circuit which integrates main PCB and select PCB was designed.

Section 2 Black Box Control System

1. Black box overall block diagram

19 is a black box block diagram.

(1) signal input

Voltage-Takes commercial 220V input and generates data for each voltage

Current-CT inputs current

Ground Leakage-ZERO CT

Temp-RTD

(2) data output

Output relay contact in case of voltage, current, leakage or temperature error

(3) data storage

Each input data is divided by the total storage and stored in that space every 1.2 seconds.

2. Black Box Control System

20 is a voltage and current detection parameter waveform.

Receives the synchronous signal of the power supply and makes the waveform of the sine wave half cycle corresponding to the synchronous signal and compares it with the signal.If the upper level and the lower level are set based on the made signal and it is out of the range, the phase error of one cycle is abnormal. An alarm is generated and the potential is checked at the time of the maximum point of the period and written as the data voltage data. The allowable range of the voltage does not generate an alarm. This is because the range of the upper limit and the lower limit refers to the voltage abnormal range at the reference level. This is because D6 of general data becomes an alarm signal voltage error. Doing so can monitor phase harmonics and short circuits in the general power supply. The current stores three current inputs and one temperature input simultaneously as digitized values.

Section 3 Black Box Main Circuit Diagram

21. Black box main circuit diagram.

1. How to save voltage data

The voltage data represents a range of ± 32 V (278 to 343) relative to the maximum value (311 V) when the range of 0 to 64 is "AC220V input, that is, the measured value is 0V when the input is 278V, and the measured value when the input is 343V. Indicates 64V, and the rate of change of the voltage as much as the allowable value is also ignored, for example, even if the current fluctuation of ± 3V at 311V is not the same as the original voltage and is not recorded (based on the rated voltage).

If more than 10 minutes occur continuously, an alarm is triggered and the data is saved for 10 more minutes, then the saving ends and the standby mode is entered. The reason for entering the standby mode is that the total storage time is shortened by being overwritten. And even if the alarm is repeated several times with a time of less than 10 minutes, the storage time is shortened. There are other ways to solve this problem.

2. Voltage data capacity

Voltages are assigned to three analog inputs and each input is processed on a separate board. The following data is the capacity to be stored when the voltage is abnormal due to phase harmonics. In this case, one occupies one byte.

-1 second-60 Hz × 2 × 3ch = 360

-1 minute-360 × 60Sec = 26,100

-10 minutes-26,100 × 10 = 261,000

-20 minutes-26,100 × 20 = 432,000

-30 minutes-26,100 × 30 = 783,000

-1 hour-26,100 × 60 = 1,556,000

It is the capacity to be stored when no abnormality occurs and the normal power input is continued. In this case, it is assumed that the number corresponding to two is 128.

-Up to 3MB capacity

-1 Mega-1 (data) + 999999 (compression) = 999999 ÷ 120

3. Current data storage method

The current data is received at the same time and processed and stored in the signal. In the current data, the range of 0 to 64 V represents 1 A interval, that is, 0 to 64 A.

4. Current data storage capacity

1 second-3

How to save temperature data

The temperature is stored in a separate space at 10 minute intervals, and is stored in the range of 0 to 255 ° C at 0.5 ° C intervals in the range of 0 to 255 ° C.

Temperature data storage

Day 3-6 (60 minutes) × 24 × 3 = 432

Section 4 communication interface

22 is a black box communication interface detection circuit diagram

Compressed data storage format

Compressor method is used to save the data.

D7 D6 D5 D4 D3 D2 D1 D0 One c c c c c c c

D7 = 1: Compression, 0: Normal

D6 to D0 (c) = same number of data counters.

General data type

D7 D6 D5 D4 D3 D2 D1 D0 One P c c c c c c

D7 = 1: Compression, 0: Normal

D7 = 0: general data

D6 (p) = 1: Phase abnormality, 0: Normal

Voltage data from D5 to D0 (d) = 0 to 64

Section 5 memory board

23 is a circuit diagram of a black box memory board.

If you save each data in a separate time difference or method, the saving method is complicated, but it will be effective when analyzing the data. Will come out. At 1 minute intervals, the current will show a rate of change, but only the temperature will decrease. However, at 1 hour intervals, the temperature may vary, but the voltage will appear as a thick line, and the current will be about the same. To solve this problem, the memory capacity should be increased and stored in real time. The total capacity is 4,194,304 bytes.

Section 6 Black Box Control System Algorithm

24 is a black box main circuit algorithm.

First, Figure 1 corresponds to the control algorithm for the black box main circuit. When power is supplied to the main circuit, the buffer and registers are initialized. Next, there are three modes of monitoring without storing them in the memory and ones stored in the memory. The initial setting is stored in the memory when no operation is performed. When the memory storage mode is entered, the memory is initialized first and the 10 parameter values detected through the corresponding I / O port are transferred to the memory through the A / D converter. In monitoring mode, the Hex value is sent to the monitor through the communication port instead of the memory.

Section 7 Black Box Memory Control Algorithm

25 is a black box memory control algorithm.

1. Memory map

The sector is divided into eight large sectors by the structure of the flash memory. Each large sector is subdivided into eight small sectors, and the three sectors store three phases of voltage, current, leakage and three temperature data.

The temperature is divided into four spaces in one small sector, and three temperatures and memory states are stored. Each sector classification and memory is as follows.

Large sectors: 524,288 bytes (4,194,304 bits) = 65,536 bytes × 8

Sector 0-0 00 00 H-0 FF FF H

Sector 1-1 00 00 H-1 FF FF H

Sector 2-2 00 00 H-2 FF FF H

Sector 3-3 00 00 H-3 FF FF H

Sector 4-4 00 00 H to 4 FF FF H

Sector 5-5 00 00 H to 5 FF FF H

Sector 6-6 00 00 H-6 FF FF H

Sector 7-7 00 00 H to 7 FF FF H

50 shows an address address according to the AMD flash memory 29F040B sector.

Small sector: 65,536 bytes = 8,192 bytes × 8

R voltage sector-x 00 00 H to x 1F FF H

S voltage sector-x 20 00 H to x 3F FF H

T voltage sector-x 40 00 H to x 5F FF H

R Current Sector-x 60 00 H to x 7F FF H

S Current Sector-x 80 00 H to x 9F FF H

T Current Sector-x A0 00 H to x BF FF H

Leakage Sector-x C0 00 H to x DF FF H

Temperature Sector-x E0 00 H to x FF FF H

Temperature Sector: 8192 Bytes = 2048 Bytes × 8

Temperature sector 1-x E0 00 H to x E7 FF H

Temperature 2 Sector-x E8 00 H to x EF FF H

Temp 3 Sector-x F0 00 H to x F7 FF H

Status Sector-x F8 00 H to x FF FF H

51 shows a black box memory sector configuration. In the figure, an 'x' indicates a large sector number. H indicates a hexadecimal value.

Section 8 Black Box Analysis Software

Fig. 26 shows the analysis software algorithm.

The analysis software of the black box for electric fire sensation is composed of Visual Basic 6.0. Unpack the initial archive and run the setup.exe file to install the analysis software.

In the analysis software's algorithm, when the program starts, the menu for setting the communication environment appears on the screen as shown in Figure 28. After setting the user environment, the initial screen as shown in Figure 27 appears. Click the Receive Data icon in the initial screen pull-down menu, and a dialog box as shown in Figure 29 will appear.If you press OK, the communication circuit will receive S code, which is the first start code in memory, and receive data in 1024Bytes. When the N code is received from the memory, the counter is incremented by one. If N code is not received, it is initialized to the previous state and receives 1024 bytes again. When the counter is incremented by 1, 1024 bytes are received. Until the counter value reaches 1024, 1024 bytes are continuously received in infinite loops by 1024 bytes.

When the counter reaches 1024, the reception completion dialog box as shown in Figure 30 appears and the received data is saved on the computer PC. In this way, the data stored in the black box memory can be repeatedly received, and in order to view the data stored in the memory, after the reception is completed, it can be viewed as 4 megabits of text in Wordpad as shown in Fig. 32 and a 256-sheet text file. In order to completely shut down the black box management system, click End Program on the initial menu pull-down menu. A dialog box appears as shown in Figure 31.

Fig. 27 shows the analysis software initial screen, Fig. 28 shows the analysis software communication setting screen, Fig. 29 shows the analysis software reception screen, Fig. 30 shows the data reception completion screen and Fig. 31 shows the program end screen. 32 shows a memory text file.

Section 9 Experimental Waveforms

33 is a waveform diagram of a power input synchronous signal, FIG. 34 is a comparison signal waveform diagram with an input signal, FIG. 35 is a memory communication signal and a write signal waveform, and FIG. 36 is an enlarged waveform of a memory signal.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the present invention may be modified without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As discussed above, the conclusion according to the present invention is as follows.

This system is installed and managed in the place where the prevention of fire and various accidents caused by electricity and the cause of investigation are identified, and the application stage is subdivided to develop the black box for the electric fire sensation suitable for the realities of consumers. .

The CES1200, which is being used by Cheongpung Electric Safety Corporation, analyzed the existing system and presented the circuit problem and the matter to be improved. The problem with the circuit of the existing system is to improve the integrated control circuit design and the PCB board, and to provide the circuit security to widen the leakage current range.

In the development of the first prototype black box, the control circuit consisted of main circuit, voltage current detection circuit, earth leakage temperature detection circuit, communication interface circuit, and memory board circuit, but in the secondary prototype, the main circuit and voltage The current detection circuit and the earth leakage temperature detection circuit are integrated to reduce the size and weight, and to achieve more precise control.

The circuit design was designed to minimize the size of the memory board to store the data, which is the core of the black box, and it was designed to be less than 5cm in width and length.

We have developed an analysis software that can analyze data stored in the memory of the black box and increase the period of storage in the memory up to 45.3 days to save a wider range of data and to record the accurate data in the event of an event. Was set to 1.2Sec so that the cause of fire could be identified accurately.

Claims (3)

In the black box system for electric fire identification for the cause analysis and prevention of electric fire, It is installed in the distribution panel of the facility, and includes a black box means having a voltage current detection circuit unit for detecting the voltage and current of electricity passing through the distribution panel, a short circuit / temperature detection circuit unit, a communication interface circuit unit, the main circuit unit, The black box means, Memory means for recording and storing the voltage, current, and temperature data; And data transmission means for transmitting the data stored in the memory means to the following terminal apparatus. Receiving the data transmitted from the data transmission means, and if there is an error in the received data through a wired or wireless communication means the terminal device for notifying the relevant parties, such as safety managers and fire departments to recognize the contents of the abnormal data Black box system for electric fire identification, characterized in that it comprises. The black box system of claim 1, wherein the data storage in the memory means is performed at 1.2 second intervals. delete