Cold storage polyurethane thermal insulation layer deep fire detection device

Abstract

The utility model provides a cold storage polyurethane thermal insulation layer deep fire detection device, which comprises an infrared camera, an infrared detector, a thermocouple, a nitrogen oxide sensor, a carbon monoxide sensor and a control system, and is characterized in that the infrared camera, the infrared detector, the thermocouple, the nitrogen oxide sensor and the carbon monoxide sensor are connected with the control system. According to the application, by combining the infrared camera, the infrared detector and the thermocouple, the specific position of a fire point in the polyurethane thermal insulation layer can be quickly and accurately positioned; the concentration of toxic gas in the air is detected in real time through the nitrogen oxide sensor and the carbon monoxide sensor so as to evaluate the field environment safety; the accuracy of fire detection can be improved, and reliable safety data support can be provided for on-site rescue workers, so that the efficiency and safety of fire rescue are remarkably improved.

Description

Technical Field

[0001] The present application belongs to the technical field of fire detection devices, and in particular relates to a deep-level fire detection device for a cold storage polyurethane insulation layer. Background Art

[0002] Cold storage typically uses polyurethane as its insulation layer. Polyurethane is widely used due to its excellent thermal insulation properties, lightweight, and durability. However, polyurethane is highly flammable under high temperatures or open flames, and the combustion process releases large amounts of toxic gases, primarily nitrogen oxides (NOx) and carbon monoxide (CO). These gases are not only highly toxic to the human body but can also pose a serious risk of asphyxiation at high concentrations. Furthermore, nitrogen oxides are highly oxidizing and can cause severe irritation to the respiratory tract and lungs. Long-term exposure can lead to acute or chronic poisoning.

[0003] Traditional fire detection devices are usually limited to flame, smoke or simple temperature change detection, and it is difficult to quickly and accurately detect fire sources hidden deep inside the polyurethane insulation layer. As a result, during the fire rescue process, rescuers are unable to grasp the location of the fire source and the content of toxic substances in the air in a timely manner, increasing the risk of rescue. Summary of the Invention

[0004] This application provides a deep-level fire detection device for the polyurethane insulation layer of a cold storage, which can accurately locate the fire source inside the polyurethane insulation layer of the cold storage. The technical solution of this application is as follows:

[0005] An embodiment of the present application provides a deep-level fire detection device for the polyurethane insulation layer of a cold storage, comprising: an infrared camera, an infrared detector, a thermocouple, a nitrogen oxide sensor, a carbon monoxide sensor, and a control system, wherein the infrared camera, infrared detector, thermocouple, nitrogen oxide sensor, and carbon monoxide sensor are all connected to the control system.

[0006] In some implementations, the device further includes a box, and the infrared camera, infrared detector, thermocouple, nitrogen oxide sensor, carbon monoxide sensor and control system are all placed in the box.

[0007] In some implementations, the box is an air box.

[0008] In some implementations, the infrared camera, the infrared detector, and the thermocouple are all handheld.

[0009] In some implementations, the control system includes a microcontroller, a power management module, a sensor interface module, a signal processing module, a display screen module, an alarm module and a communication module. The microcontroller is connected to the sensor interface module, the display screen module, the alarm module and the communication module. The power management module is connected to the microcontroller through an overvoltage / undervoltage protection module. The sensor interface module includes an infrared camera interface, a point infrared detector interface, a thermocouple interface, a nitrogen oxide sensor interface and a carbon monoxide sensor interface. The infrared camera interface, the point infrared detector interface, the thermocouple interface, the nitrogen oxide sensor interface and the carbon monoxide sensor interface are respectively connected to the infrared camera, the infrared detector, the thermocouple, the nitrogen oxide sensor and the carbon monoxide sensor through the signal processing module.

[0010] In some implementations, the control system further includes an over-temperature protection module, a system restart protection module, and a lightning protection module. The over-temperature protection module and the system restart protection module are both connected to the microcontroller, and the lightning protection module is connected to the power management module.

[0011] In some implementations, the alarm module is one of a buzzer and an alarm light, and the buzzer or the alarm light is connected to the microcontroller via a relay or a MOSFET.

[0012] In some implementations, the thermocouple interface is connected to the microcontroller via a thermocouple amplifier.

[0013] In some implementations, the point infrared detector interface is connected to an ADC pin of the microcontroller.

[0014] The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

[0015] By combining infrared cameras, infrared detectors and thermocouples, the specific location of the fire point inside the polyurethane insulation layer can be quickly and accurately located; the concentration of toxic gases in the air can be detected in real time through nitrogen oxide sensors and carbon monoxide sensors to assess the safety of the on-site environment; it can not only improve the accuracy of fire detection, but also provide reliable safety data support for on-site rescue personnel, thereby significantly improving the efficiency and safety of fire rescue.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0018] Figure 1 This is a schematic structural diagram of a deep fire detection device for a cold storage polyurethane insulation layer according to an embodiment of the present application;

[0019] Figure 2 It is a structural principle diagram of a control system according to an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1-Infrared camera, 2-Infrared detector, 3-Thermocouple, 4-Nitrogen oxide sensor, 5-Carbon monoxide sensor, 6-Control system. DETAILED DESCRIPTION

[0022] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] Figure 1This is a structural schematic diagram of a deep-level fire detection device for a cold storage polyurethane insulation layer provided in an embodiment of the present application. The deep-level fire detection device for a cold storage polyurethane insulation layer includes: an infrared camera 1, an infrared detector 2, a thermocouple 3, a nitrogen oxide sensor 4, a carbon monoxide sensor 5 and a control system 6. The infrared camera 1, infrared detector 2, thermocouple 3, nitrogen oxide sensor 4 and carbon monoxide sensor 5 are all connected to the control system 6.

[0027] Optionally, the infrared detector 2 is a point-type infrared detector.

[0028] Among them, the infrared camera 1 is used to preliminarily detect the fire area and quickly lock the possible fire location range through infrared temperature measurement technology. The point infrared detector is used to further accurately detect the location of the fire source within the locking range of the infrared camera 1, providing higher positioning accuracy. Once the approximate location of the fire source is determined, the thermocouple 3 is wrapped in a metal shell and inserted into the polyurethane insulation layer to measure the temperature change in real time, so as to accurately locate the specific location of the fire. The nitrogen oxide sensor 4 is used to detect the nitrogen oxide concentration at the fire scene in real time, evaluate the toxic gas content in the environment, and thus judge the safety and health status of the personnel. The carbon monoxide sensor 5 is used to detect the carbon monoxide concentration at the fire scene in real time, and further evaluate the air quality and personnel health risks. The control system 6 is used to receive and process data from each sensor, display the fire location, temperature information, and toxic gas concentration in the environment in real time, and prompt personnel with safety hazards based on the data and provide data support for search and rescue personnel to select search and rescue plans.

[0029] The control system 6 can also provide a safety level of the current environment based on the nitrogen oxide concentration and carbon monoxide concentration collected by the nitrogen oxide sensor 4 and the carbon monoxide sensor 5, combined with the carbon monoxide concentration and impact evaluation standard, and the nitrogen oxide concentration and impact evaluation standard.

[0030] Among them, the carbon monoxide (CO) concentration and impact assessment standards are as follows:

[0031] Safety: 0-9ppm: no obvious effect on most people, safe.

[0032] Note: 10-50ppm: Mild headache, fatigue or shortness of breath may occur, requiring immediate evacuation.

[0033] Danger: 51-200ppm: It will cause headaches, dizziness, vomiting and other symptoms within minutes to hours. It is recommended to evacuate immediately.

[0034] Extremely dangerous: 200+ppm: Will cause loss of consciousness within a few minutes. Prolonged exposure may be fatal. Immediate evacuation and rescue are required.

[0035] Among them, the nitrogen oxide (NOx) concentration and impact evaluation standards are as follows:

[0036] Safety: 0-5ppm: usually does not cause significant effects on health, safe.

[0037] Note: 5-20ppm: Causes irritation to eyes, nose and throat, it is recommended to wear protective equipment.

[0038] Danger: 20-100ppm: Can cause severe symptoms such as difficulty breathing and pulmonary edema. It is recommended to wear respiratory protection devices and reduce exposure time.

[0039] Extremely dangerous: 100+ppm: Highly dangerous, potentially fatal, require immediate evacuation and medical treatment.

[0040] The working process of fire detection using the cold storage polyurethane insulation layer deep fire detection device of the embodiment of the present application is as follows:

[0041] First, infrared camera 1 scans the cold storage environment, using infrared temperature measurement technology to identify areas of abnormal temperature and locate the possible fire source. A point infrared detector then performs a second scan of the area located by infrared camera 1 to further narrow the fire source. After determining the approximate fire point, thermocouples 3 are inserted into the polyurethane insulation layer to measure internal temperature changes and accurately locate the fire source. Before rescuers begin their operations, nitrogen oxide sensors 4 and carbon monoxide sensors 5 respectively monitor the concentration of toxic gases in the air to assess the safety and health of personnel. All data is transmitted in real time to control system 6 for reference by rescuers.

[0042] The deep-level fire detection device for the polyurethane insulation layer of the cold storage in the embodiment of the present application can quickly and accurately locate the specific position of the fire point inside the polyurethane insulation layer by combining an infrared camera, an infrared detector and a thermocouple; it can detect the concentration of toxic gases in the air in real time through nitrogen oxide sensors and carbon monoxide sensors to assess the safety of the on-site environment; it can not only improve the accuracy of fire detection, but also provide reliable safety data support for on-site rescue personnel, thereby significantly improving the efficiency and safety of fire rescue.

[0043] In some embodiments, the device further comprises a housing, wherein the infrared camera 1, handheld infrared detector 2, handheld thermocouple 3, nitrogen oxide sensor 4, carbon monoxide sensor 5, and control system 6 are all placed in the housing. Thus, by placing all parts of the device in the housing, it is easy to carry and use.

[0044] Preferably, the box is an aviation box, which is safe and convenient.

[0045] In some embodiments, the infrared camera 1, the infrared detector 2, and the thermocouple 3 are all handheld. Using handheld infrared camera 1, infrared detector 2, and thermocouple 3 is convenient for personnel to use.

[0046] In some embodiments, as Figure 2 As shown, the control system 6 includes a microcontroller, a power management module, a sensor interface module, a signal processing module, a display screen module, an alarm module and a communication module. The microcontroller is connected to the sensor interface module, the display screen module, the alarm module and the communication module. The power management module is connected to the microcontroller through an overvoltage / undervoltage protection module. The sensor interface module includes an infrared camera interface, a point infrared detector interface, a thermocouple interface, a nitrogen oxide sensor interface and a carbon monoxide sensor interface. The infrared camera interface, the point infrared detector interface, the thermocouple interface, the nitrogen oxide sensor interface and the carbon monoxide sensor interface are respectively connected to the infrared camera 1, the infrared detector 2, the thermocouple 3, the nitrogen oxide sensor 4 and the carbon monoxide sensor 5 through the signal processing module.

[0047] The functions, inputs and outputs of each module in the control system 6 are described in detail below.

[0048] The power management module provides stable power to various modules in the device, such as the microcontroller, display module, and all external sensors. The power management module takes an external power source or battery as input and provides stable voltage and current to various modules, such as the microcontroller, sensor interface module, display module, and alarm module.

[0049] The microcontroller (MCU), as the core processing unit, receives data from various sensors, processes it, and controls the display module for data display and outputs to the alarm module. The microcontroller's input signals come from analog or digital signals from various sensors (including the infrared camera 1, thermocouple 3, point infrared detector, nitrogen oxide sensor 4, and carbon monoxide sensor 5). Its outputs control the display module's display data and send commands to the alarm module. The microcontroller can also transmit data to other communication devices through the communication module.

[0050] The sensor interface module includes multiple interface modules for connecting to different sensors. The infrared camera interface connects to infrared camera 1 to capture infrared image data and transmit image or video data to the microcontroller. The point infrared detector interface monitors infrared radiation intensity at the fire point. The thermocouple interface accurately measures temperature. The nitrogen oxide sensor interface detects nitrogen oxide concentrations in the air and transmits the signal to the microcontroller for processing. The carbon monoxide sensor interface detects carbon monoxide concentrations and transmits the sensor output signal to the microcontroller.

[0051] The display module is used to display real-time sensor readings, fire location, temperature, and other status information. Its input data comes from the display signal of the microcontroller, and its output information displays the operating status of the search and rescue equipment, the location of the fire, and other information. It connects to the microcontroller via I2C, SPI, or UART interfaces to display fire conditions and sensor data.

[0052] The alarm module is used to sound an alarm (sound or light) according to the trigger signal of the microcontroller when the microcontroller detects fire or abnormal conditions.

[0053] The communication module is used to remotely send fire information or sensor data detected by the device to the equipment of search and rescue personnel, or connect to the cloud platform for monitoring. Data can be sent via wireless communication protocols such as WiFi, GSM or LoRa.

[0054] The signal processing module is used to filter, amplify and process the signals output by each sensor. It is responsible for signal preprocessing to ensure signal stability and accuracy.

[0055] The overvoltage / undervoltage protection module is used to detect voltage changes. When the voltage is abnormal, it cuts off the power supply to the microcontroller and sensor to prevent the voltage from being too high or too low, and protects sensitive components in the circuit such as the microcontroller and sensors from being damaged. For example, when the power supply voltage exceeds the safe range, an alarm signal is sent to the microcontroller, automatically cutting off the power supply or triggering an alarm, and entering protection mode.

[0056] In some embodiments, as Figure 2 As shown, the control system 6 also includes an over-temperature protection module, a system restart protection module and a lightning protection module. The over-temperature protection module and the system restart protection module are both connected to the controller, and the lightning protection module is connected to the power management module.

[0057] The overtemperature protection module monitors the device's internal temperature to prevent overheating. It has a built-in temperature sensor connected to the microcontroller's ADC interface, sending a signal to the microcontroller. When the temperature exceeds a preset value, the microcontroller enters protection mode, potentially triggering the device's cooling mechanism or automatically shutting down the system.

[0058] The system restart protection module is placed in the microcontroller circuit to monitor the system status and automatically restart when no response is detected. When the device is abnormally shut down, the timer or watchdog circuit is triggered to restart the device to ensure that the search and rescue device will not stop working for a long time due to a fault.

[0059] The lightning protection module is connected between the power input terminal of the device and the ground. When a surge caused by lightning occurs, it quickly conducts the surge to the ground to prevent damage to system components. It is used to protect the system from surges caused by lightning, especially when there are external antennas or long cable connections.

[0060] In some embodiments, the alarm module is one of a buzzer and an alarm light, and the buzzer or the alarm light is connected to the microcontroller via a relay or a MOSFET.

[0061] Thus, abnormal situations can be alarmed through sound and light.

[0062] In some embodiments, the thermocouple interface is connected to the microcontroller via a thermocouple amplifier.

[0063] The signal collected by the thermocouple 3 is amplified by the thermocouple amplifier and then transmitted to the microcontroller.

[0064] In some embodiments, the point infrared detector interface is connected to an ADC pin of the microcontroller.

[0065] The analog signal collected by the point infrared detector is converted into a digital signal through analog-to-digital conversion and processed by a microprocessor.

[0066] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A cold storage polyurethane insulation layer deep fire detection device, characterized in that: include: An infrared camera, an infrared detector, a thermocouple, a nitrogen oxide sensor, a carbon monoxide sensor, and a control system, wherein the infrared camera, the infrared detector, the thermocouple, the nitrogen oxide sensor, and the carbon monoxide sensor are all connected to the control system; The device also includes a box, in which the infrared camera, infrared detector, thermocouple, nitrogen oxide sensor, carbon monoxide sensor and control system are all placed; The infrared camera, the infrared detector and the thermocouple are all handheld.

2. The cold storage polyurethane insulation layer deep fire detection device according to claim 1 is characterized in that: The box body is an aviation box.

3. The cold storage polyurethane insulation layer deep fire detection device according to claim 1 is characterized in that: The control system includes a microcontroller, a power management module, a sensor interface module, a signal processing module, a display screen module, an alarm module and a communication module. The microcontroller is connected to the sensor interface module, the display screen module, the alarm module and the communication module. The power management module is connected to the microcontroller through an overvoltage / undervoltage protection module. The sensor interface module includes an infrared camera interface, a point infrared detector interface, a thermocouple interface, a nitrogen oxide sensor interface and a carbon monoxide sensor interface. The infrared camera interface, the point infrared detector interface, the thermocouple interface, the nitrogen oxide sensor interface and the carbon monoxide sensor interface are respectively connected to the infrared camera, the infrared detector, the thermocouple, the nitrogen oxide sensor and the carbon monoxide sensor through the signal processing module.

4. The cold storage polyurethane insulation layer deep fire detection device according to claim 3 is characterized in that: The control system further includes an over-temperature protection module, a system restart protection module and a lightning protection module. The over-temperature protection module and the system restart protection module are both connected to the microcontroller, and the lightning protection module is connected to the power management module.

5. The cold storage polyurethane insulation layer deep fire detection device according to claim 3 is characterized in that: The alarm module is one of a buzzer and an alarm light, and the buzzer or the alarm light is connected to the microcontroller through a relay or a MOSFET.

6. The cold storage polyurethane insulation layer deep fire detection device according to claim 3 is characterized in that: The thermocouple interface is connected to the microcontroller via a thermocouple amplifier.

7. The cold storage polyurethane insulation layer deep fire detection device according to claim 3 is characterized in that: The point-type infrared detector interface is connected to the ADC pin of the microcontroller.

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