RU117220U1 - INTEGRATED OPTICAL DETECTOR - Google Patents

Abstract

1. A complex optical detector containing a microcontroller, a photosensitive channel connected to its input, a video camera, RAM and nonvolatile memory units, and a central processor connected to the output data transmission units, characterized in that the RAM and nonvolatile memory units, a video camera and a microcontroller are connected to the central processor with the possibility of simultaneous processing by the central processor of the signal from the photosensitive channel and the signal from the video camera, while the detector is equipped with a glass contamination sensor, the output of which is connected to one of the microcontroller inputs. ! 2. The complex optical detector according to claim 1, characterized in that it further comprises a temperature sensor connected to the microcontroller and a glass heating unit. ! 3. The complex optical detector according to claim 1, characterized in that it further comprises an infrared illumination unit controlled by a central processor. ! 4. Complex optical detector according to claim 1, characterized in that an infrared and / or ultraviolet radiation sensor is used as the photosensitive channel. ! 5. The complex optical detector according to claim 1, characterized in that it further comprises an optics control unit connected to the central processor. ! 6. The complex optical detector according to claim 1, characterized in that it further comprises a control unit for the detector's turntable, connected to the central processor.

Description

The inventive utility model relates to the field of burglar alarm, in particular, to the field of fire safety, and in particular to means of warning about fire, smoke of various buildings, structures. The device can be used both independently and as part of a full-fledged security complex. The utility model can also be applied to perform a number of auxiliary functions, such as smoke detection, technological control over the operation of the equipment and its integrity, motion detection in the controlled area.

Of the variety of tools for the same purpose as the claimed utility model, there is a device for detecting fire with visual confirmation, containing a video camera, fire detector, video processor, interface, multiplexer, control unit, signal transmitter, power supply and two-wire signal line. The output of the video camera is connected to the input of the video processor, the output of which is connected to the first input of the multiplexer, the output of the fire detector is connected to the first input of the control unit and the first input of the interface, the output of which is connected to the second input of the multiplexer, the output of which is connected to the second input of the signal transmitter, the input of the power supply is connected to the signal line and the output of the signal transmitter, the output of the power supply is connected to the input of the fire detector, the first input of the signal transmitter, the second input of the interface, the second ode control unit and the third input of the multiplexer, the output control unit is connected to the input of a second video camera and the video input (RF patent for utility model №66578).

The known device generates a digital video using a video camera when a fire detector is triggered, however, direct detection of a fire in this device occurs as a result of analysis of signals received from infrared (IR) and ultraviolet (UV) sensors, and the video camera is used to record events only when a fire detector is triggered . Thus, firstly, many useful functions inherent in video monitoring of an object in the absence of fire are lost, and secondly, the non-use of video data for fire detection reduces the noise immunity of the device. In addition, this device does not provide control of the cleanliness of the outer glass and glass heating, therefore, cannot be used in open facilities.

A video fire detection device is known, which consists of a video camera, an information processing unit, a notification transmission interface. The principle of operation of this device is based on the analysis of images by the structural and frequency components of the video sequence, that is, it is actually an activity detector with software support that can detect a fire (WIPO publication No. WO 0167415).

A disadvantage of the known device is the use of an analog video camera and an analog-to-digital conversion device, which reduces the speed and accuracy of video transmission for processing by the central processor and, as a result, the range and accuracy of fire detection.

A device for detecting flame from a video image, which consists of a video camera, digital signal processor and auxiliary devices. The principle of operation of the device consists in the allocation on the video image of areas similar to a flame, and the analysis of their constant and variable components according to a special algorithm (US patent No. 6184792).

The disadvantages of this device are low noise immunity at open technological facilities and the possibility of false alarms when modulating the brightness of objects similar in color to a flame (for example, foliage vibrations against the background of red-orange parts of buildings, etc.).

A device for detecting a fire is known, comprising a video camera and a fire detection unit, a distortion filter and a distortion recognition unit, a background analysis unit and a decision module, while the output of the camera is connected to the input of a distortion filter, the input of the distortion recognition unit, the first input of the fire detection unit and the first the input of the decision-making module, the output of the distortion filter is connected to the second input of the fire detection unit, the output of the distortion recognition unit is connected to the third input of the fire detection unit, output d the background analysis unit is connected to the fourth input of the fire detection unit, the first, second and third outputs of which are connected respectively to the second, third and fourth inputs of the decision-making module (RF patent for utility model No. 66580).

In this device, flame detection is based only on the analysis of the video image obtained from the camera of the visible range. In this case, a number of situations are possible in which the detector will give false alarms, which negatively affects the operational characteristics of the device.

The closest in technical essence to the claimed utility model is an optical fire detector containing infrared and ultraviolet radiation sensors, the outputs of which are connected to the control microprocessor through a matching circuit, a video camera, a video processor, operational and non-volatile video memory, while the video camera output is connected to the input of the video processor, one from the inputs / outputs of the video processor is connected to the input-output of non-volatile video memory, the other input-output is connected to the input-output operational video memory, and the third input-output is connected to the input-output of the control microprocessor (RF patent for utility model No. 522227).

The video camera in the known device is designed to record events, while the information from the camera is not processed or analyzed in any way. Therefore, when using this device, fire detection is based on the analysis of IR and UV channels simultaneously without the use of a video camera. Contrary to what is declared, the use of this device in open facilities is difficult due to the lack of external glass cleanliness and glass heating control units in the device design.

The objective of the proposed technical solution is to create a device that provides comprehensive maintenance of an open / closed facility in terms of organizing fire protection, namely, providing control over possible fires, detecting smoke, movement, and implementing technological control.

The technical result achieved by using the inventive utility model is to increase the accuracy of detection of fire, range. Also, the technical result consists in providing the ability to localize several foci of flame, localization of the source of ignition in space, providing the ability to detect smoke.

The inventive device, in addition, has the following advantages:

- high noise immunity and resistance to false alarms;

- the possibility of using the detector (detector) in the security system of video surveillance, VK COT (Security Camera System CCTV);

- the possibility of technological control of the operability and integrity of the equipment.

- the ability to use the detector in night mode.

The problem is solved in that a complex optical detector containing a microcontroller, a photosensitive channel connected to its input, a video camera, blocks of random and non-volatile memory, and a central processor connected to blocks of output data transmission, blocks of random and non-volatile memory, a video camera and microcontroller are connected to the central processor with the possibility of simultaneous processing by the central processor of the signal from the photosensitive channel and the signal from the video camera, while the detector is provided with an IR backlight unit, connected to the output of the CPU, glass contamination sensor, and the glass heating unit whose outputs are connected to inputs of the microcontroller. As a photosensitive channel, an infrared and / or ultraviolet radiation sensor can be used. Additionally, the device can be equipped with an optics control unit and a detector rotary platform control unit connected to the central processor.

The utility model is illustrated by the following images, where

Figure 1 shows a block diagram of the hardware of the inventive device, and

Figure 2 shows a block diagram of the software part of the device.

The positions on the flowcharts are indicated by:

1 - Camcorder

2 - Block infrared (IR) - backlight

3 - Photosensitive channel

4 - Glass contamination sensor

5 - Temperature sensor

6 - Glass heating unit

7 - Microcontroller

8 - CPU

9 - RAM

10 - Non-volatile memory

11 - LAN - interface

12 - RS-485 - interface

13 - Dry contact

14 - Optics control unit

15 - The control unit of the turntable

16 - Video

17 - Data from IR / UV sensor

18 - Data from glass contamination sensor

19 - Data from the temperature sensor

20 - Optics control unit

21 - The control unit of the turntable

22 - Flame detection unit

23 - Smoke Detection Unit

24 - Block motion detection

25 - Technological control unit

26 - Block frequency analysis signal IR / UV sensor

27 - Glass analysis unit

28 - Temperature processing unit

29 - Decision block

30 - Color Check Module

31 - Module for determining moving objects

32 - Time-frequency check module

33 - Neural network data analysis module

34 - Zone Division Module

35 - Spatial-frequency filtering module

36 - Module selection foreground and fixed background

37 - Saturation check module

38 - Spatial-frequency filtering module

39 - Time-frequency analysis module

40 - Module selection foreground and fixed background

41 - Moving Object Tracking Module

42 - Detection module of the object of interest

43 - Module for monitoring the state of the object (reading instrument readings)

The inventive device comprises a video camera 1, the output of which is connected to the input of the central processor 8, controlled by the central processor, a photosensitive channel 3, a glass contamination sensor 4, a temperature sensor 5, the outputs of which are connected to the inputs of the microcontroller unit 7, while the microcontroller 7 is connected to one of the inputs central processor 8. The inputs of the glass heating unit 6, IR block 2 and dry contact 13 are connected to the outputs of the central processor 8. The central processor 8 is also connected by input / output lines with locks of RAM 9, non-volatile memory 10, LAN interface 11, RS-485 interface 12, the optics control unit 14 and the rotary platform control unit 15. The detector is powered from an external source.

The video camera 1 is intended for recording and converting a video image into a digital signal and is based on a CCD matrix. As such a video camera, for example, the Aptina MT9D131 model with a resolution of 1600 × 1200 pixels can be used.

The IR illumination unit 2 is controlled by the central processor 8. IR illumination is necessary to illuminate the camera visibility zone in the dark and does not affect the performance of the fire IR sensor, as its radiation range is outside the sensitivity range of the IR sensor.

The photosensitive channel 3 is a sensitive IR element, either a UV sensor or a combined IR-UV sensor (depending on the version of the device) and is designed to confirm flame detection.

The glass pollution sensor 4 is made in the form of an optical circuit that allows you to control the purity of the outer glasses of the described device.

The temperature sensor 5 transmits the temperature data necessary for the on / off algorithm of the glass heating module to the microcontroller.

The glass heating unit 6 includes heating elements. This unit provides the inclusion of heating the outer glasses of the device when they are icing or fogging, in accordance with the logic of the algorithm of the central processor 8.

The microcontroller unit 7 is a hardware-software device designed to convert analog signals from channel 3, a glass contamination sensor 4, and a temperature sensor 5 into digital signals with their subsequent processing. The microcontroller 7 generates a fire signal based on the data received from channel 3, a signal about the contamination of the outer glasses of the sensor, as well as a signal from the temperature sensor 5, and transmits these signals to the central processor 8. Thus, block 7 contains program blocks for frequency analysis of the signal 26, analysis of glass purity 27 and processing of temperature data 28.

The central processor 8 simultaneously processes the data arriving at it from the video camera 1 and the microcontroller 7, and using the algorithm makes a decision about the state of the entire device and generates the corresponding signals transmitted via interfaces 11 and / or 12. Also by analyzing the data received from the video camera and temperature sensor, the central processor generates on / off signals for IR illumination and glass heating, respectively. In case of fire detection, a command is also issued to close the dry contact 13. In addition, in accordance with the logic of the algorithm, the central processor controls the operating modes of the optics 14 and the rotary platform 15. In the central processor 8, the detection units 22, 23, 24, 25 are implemented in hardware and decision block 29.

Random access memory 9 is a volatile part of the system of the described device, which temporarily stores data and instructions necessary for the central processor 8 to perform operations.

Non-volatile memory 10 is a storage device based on electrically reprogrammable memory (EEPROM), in which video data received immediately before and during alarms and warnings is archived.

LAN interface 11 contains a standard module for converting signals to a packet form of data transmission over the Modbus TCP network protocol.

RS-485 interface 12 contains a standard module for converting signals to a packet form of data transmission via Modbus RTU protocol.

Dry contact 13 is used to close the external high-current circuits of the fire extinguishing system when a fire is detected by the sensor.

The optics control unit 14 contains zoom and focus lenses of the video camera, as well as a control controller that receives control signals from the central processor 8. Block 14 is used to control the viewing angle of the device and focus the video camera.

The control unit of the turntable 15 allows you to orient the sensor in space in accordance with the commands of the Central processor 8, or the commands of the operator. Block 14 contains a rotary electric drive and a control controller that receives control signals from the central processor 8.

Blocks 14 and 15 contain software blocks for controlling the optics 20 and controlling the turntable 21, respectively.

The device operates as follows. The main principle of its action is to analyze the video data received from camera 1 and correlate them with the photosensitive channel data.

The video camera 1 registers an input signal, which, after being converted to digital form, is subjected to parallel analysis in each of the detection units (flame detection unit 22, smoke detection unit 23, motion detection unit 24, process control unit 25.

Video data 16 in the form of a digital signal comes from the camera unit 1 to the central processor 8. Data 17, 18 and 19 come from the hardware units 3, 4 and 5, respectively, to the microcontroller 7.

In the flame detection unit 22, the video signal is sequentially processed in the following software modules:

30 Color check module. In this module, the signal is analyzed for areas with a color close to the color of the flame. Also, this module processes data for the light intensity of the image and generates a signal about the day or night camera operation modes.

31 The module for determining moving objects. This module is used to determine non-stationary objects.

32 Time-frequency verification module. The module analyzes the dynamics of selected image areas.

33 Neural network data analysis module. The neural network provides recognition of the characteristic features of the flame in the incoming signal.

34 Zone separation module. Designed to localize one or more independent areas of ignition.

35 Spatial-frequency filtering module. Carries out the spatial-frequency analysis of the selected zones.

In the smoke detection unit 23, the data is sequentially processed in the following modules:

36 Foreground and still background highlighting module. The module collects statistics of stationary areas of the image and allows you to separate the background and moving objects.

37 Saturation check module. Tracks the change in color saturation of stationary objects, which is necessary for detecting the initial stages of smoke.

38 Spatial-frequency filtering module. Examines the texture of the object, revealing signs characteristic of smoke.

39 Time-frequency analysis module. Explores the dynamics of selected image areas.

In the motion detection unit 24, the signal is sequentially analyzed in the modules:

40 Foreground and still background highlighting module. The module collects statistics of stationary areas of the image and allows you to separate the background and moving objects.

41 Tracking module for moving objects. Selects individual moving objects and tracks the direction and trajectory of their movement.

In the block of technological control 25, the signal is sequentially processed in the following modules:

42 Detection module of an object of interest. According to a known example, an object of interest in a video image is located.

43 Module for monitoring the state of an object (reading instrument readings). It monitors the state of the object for integrity or displacement, or, depending on the task, reads the readings of the device if the measuring device is the target of observation.

The signals from each of the detection units 22, 23, 24, 25 are received in the decision block 29.

The block of frequency analysis of the signal of the IR / UV sensitive element 26 processes the analog signal received from the IR / UV sensor for further transmission of data about the state of the channel to the decision block 29.

Glass purity analysis unit 27. Processes data from an optical detector and sends a signal to decision block 29.

The unit for processing temperature data 28. It processes the analog signal from the temperature sensor for further data transfer to the decision unit 29.

In decision block 29, data is collected and processed from the remaining blocks. The decision on the presence or absence of a flame in the field of view of the device is based on the signals simultaneously from the flame detection unit 22 and the frequency analysis unit of the IR / UV sensitive element 26 signal. If the unit 26 detects a flame and the unit 22 suspects a fire, the acceptance unit solutions, through communication with the optics control unit 20 and the rotary platform control unit 21, sends the last data of the localization of the suspicious video object to more accurately configure the optics and the position of the video camera sphere in space.

It is possible to process block 29 of input data from ACS devices containing information on dividing the sensor visibility into control zones, when a fire is detected in which the sensor will not be triggered and an external alarm signal will be sent. Using the sensor control program, sections of the video image are distinguished in which the presence of one of the factors that the sensor monitors (flame, smoke, heavy traffic) is allowed. In this case, if one or more controlled factors are detected in the “allowed” zone, the sensor will send only a warning to the operator’s console, and the alarm will not turn on. This can be used during repair work in the sensor field of view or with the constant presence of a source of flame in the field of view of the sensor (gas flare at the facility, for example).

Thus, as a result of the simultaneous processing by the decision block of the signals from the flame detecting unit and the frequency analysis unit, fire detection occurs. In the event that both of these blocks confirm a fire, the decision block generates a fire signal and transmits it to the operator console using hardware blocks 11, 12, 13. In this case, one or more image areas containing the flame are selected graphically using the program unit 34. If a fire is detected only by the frequency analysis unit, and the flame detection unit does not confirm the fire, but at the same time, areas close in color to the flame are detected in the video image by the color checking software module 30, then b a decision lock sends commands to rotate the platform and enlarge the image to blocks 14 and 15 in such a way as to bring closer the “suspicious” areas. If after this the flame detection unit confirms a fire, the decision unit also generates a fire signal and transmits it to the operator console, highlighting the fire zones graphically. Also, in the operating mode, the image from the video camera is constantly transmitted by block 11 to the operator’s console.

In the case of smoke detection by the detection unit 23, the corresponding signal is transmitted to the decision block, which generates a “Smoke” signal and transmits it to the operator console through hardware units 11 and 12. In this case, the video transmitted from the video camera 1 to the operator console is graphically highlighted smoke area.

In case of motion detection by the detection unit 24, the corresponding signal is transmitted to the decision unit. If the magnitude of the moving objects and / or the speed of their movement exceeds the threshold set by the operator, the decision unit transmits the “Motion” signal to the operator’s console through the hardware blocks 11 and 12. In this case, moving objects are graphically highlighted on the video image.

The inventive device combines several solutions specific to security systems in industrial facilities, it can replace a number of traditional devices, such as surveillance cameras, smoke and fire sensors, motion sensors and some technological control devices.

Claims (6)

1. A complex optical detector containing a microcontroller, a photosensitive channel connected to its input, a video camera, operational and non-volatile memory blocks, and a central processor connected to output data transmission blocks, characterized in that the operational and non-volatile memory blocks, a video camera and a microcontroller are connected to the central processor with the possibility of simultaneous processing by the central processor of the signal from the photosensitive channel and the signal from the camera, while the detector is equipped with glass contamination sensor, whose output is connected to one of the inputs of the microcontroller. 2. The integrated optical detector according to claim 1, characterized in that it further comprises a temperature sensor connected to the microcontroller and a glass heating unit. 3. The integrated optical detector according to claim 1, characterized in that it further comprises an infrared illumination unit controlled by a central processor. 4. The integrated optical detector according to claim 1, characterized in that an infrared and / or ultraviolet radiation sensor is used as a photosensitive channel. 5. The integrated optical detector according to claim 1, characterized in that it further comprises an optics control unit connected to a central processor. 6. The integrated optical detector according to claim 1, characterized in that it further comprises a control unit for a rotary detector platform connected to a central processor.