High-temperature NMP gas detection alarm device and gas detection alarm method

Abstract

The invention relates to the technical field of gas detection, in particular to a high-temperature NMP gas detection alarm device and a gas detection alarm method.The device comprises an acquisition module, an alarm module and a control module, and the acquisition module is used for acquiring NMP gas data of equipment to be monitored according to a preset acquisition period; the control module is used for generating a moving average concentration value according to the NMP gas data of the plurality of cycles acquired by the acquisition module based on a preset dynamic mean filtering algorithm, determining a current alarm grade according to a concentration interval in which the moving average concentration value is located, and generating an alarm signal according to the current alarm grade; and the alarm module is used for carrying out acoustic alarm reminding and optical alarm reminding according to the alarm signal, so that the problems of relatively large monitoring error caused by the fact that a traditional catalytic combustion type sensor needs to be directly exposed in a high-temperature gas environment and the problem that real-time detection cannot be realized due to a split type design in the prior art are solved; and the accuracy of monitoring the NMP concentration and the real-time performance of detection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to a high-temperature NMP gas detection alarm device and a gas detection alarm method. Background Art

[0002] The coating and baking process in the lithium-ion battery manufacturing process is the core process of electrode plate formation. It is necessary to monitor the concentration of N-methylpyrrolidone (NMP) in real time to ensure production safety and the personal safety of workers.

[0003] In the related art, a catalytic combustion sensor is usually used for direct measurement, and a split structure is adopted, that is, the sensor and the controller are separated, and a condensation filter module is separately equipped to reduce the gas temperature.

[0004] However, in related technologies, catalytic combustion sensors need to be directly exposed to a high-temperature gas environment. The activity of the catalyst decays rapidly due to high temperature, resulting in zero-point drift. In addition, there are by-products such as silicon compounds and sulfides in the coating oven. The catalytic combustion sensor is prone to poisoning and failure, resulting in a high false alarm rate. At the same time, the split design will cause delays in signal transmission, making real-time diagnosis impossible, which urgently needs to be resolved. Summary of the Invention

[0005] The present invention provides a high-temperature NMP gas detection and alarm device and a gas detection and alarm method to solve the problems of large monitoring errors caused by the need for traditional catalytic combustion sensors to be directly exposed to a high-temperature gas environment and the inability to achieve real-time detection due to the split design in related technologies, thereby improving the accuracy of NMP concentration monitoring and the real-time performance of detection.

[0006] A first aspect of the present invention provides a high-temperature NMP gas detection and alarm device, comprising: an acquisition module, an alarm module, and a control module, wherein the acquisition module is used to collect NMP gas data of the equipment to be monitored according to a preset acquisition cycle; the control module is used to generate a sliding average concentration value based on a preset dynamic mean filtering algorithm according to the NMP gas data of multiple cycles collected by the acquisition module, and determine the current alarm level according to the concentration range in which the sliding average concentration value is located, and generate an alarm signal according to the current alarm level; the alarm module is used to perform acoustic and optical alarm reminders according to the alarm signal.

[0007] Further, in some embodiments, the control module comprises: a data processing unit configured to generate a sliding average concentration value based on a preset dynamic average filtering algorithm and the NMP gas data collected by the collection module in multiple periods; a determination unit configured to determine the current alarm level as a first level when the sliding average concentration value is in a first concentration interval, determine the current alarm level as a second level when the sliding average concentration value is in a second concentration interval, and determine the current alarm level as a third level when the sliding average concentration value is in a third concentration interval, wherein the emergency degree of the first level is greater than the emergency degree of the second level, and the emergency degree of the second level is greater than the emergency degree of the third level; a first generation unit configured to generate a shutdown instruction according to the first level, generate a red light warning instruction according to the second level, and generate a yellow light warning instruction according to the third level.

[0008] Further, in some embodiments, the control module further comprises: a second generation unit configured to generate an exhaust signal when the current alarm level is the second level.

[0009] Further, in some embodiments, the high-temperature NMP gas detection and alarm device further comprises: an exhaust system configured to perform an exhaust action according to the exhaust signal.

[0010] Further, in some embodiments, the high-temperature NMP gas detection and alarm device further comprises: a communication module configured to upload the NMP gas data in multiple periods to a preset cloud and / or send the alarm signal to the alarm module and / or send the exhaust signal to the exhaust system.

[0011] Further, in some embodiments, the communication module integrates a 4G wireless transmission module, a 5G wireless transmission module, an RS485 wired communication module, and a CAN industrial bus.

[0012] Further, in some embodiments, the control module further comprises: an upgrade unit configured to decrypt an encrypted firmware upgrade package by AES-256 after the communication module receives the encrypted firmware upgrade package, and complete remote OTA upgrade based on the decryption result.

[0013] Further, in some embodiments, the high-temperature NMP gas detection and alarm device further comprises: a display module configured to display real-time NMP concentration, the sliding average concentration value, and the current alarm level; and a power supply module configured to supply power to the collection module and the control module.

[0014] According to the high-temperature NMP gas detection and alarm device provided by an embodiment of the present invention, according to a preset collection cycle, an NMP sensor connected by a high-temperature resistant shielded cable collects NMP gas data of the monitored equipment. Based on a dynamic mean filtering algorithm, a sliding average concentration value is generated based on the NMP gas data collected over multiple cycles, the current alarm level is determined, and a real-time alarm is issued. This solves the problem of large monitoring errors caused by the need for traditional catalytic combustion sensors in related technologies to be directly exposed to a high-temperature gas environment and the problem of being unable to achieve real-time detection due to a split design, thereby improving the accuracy of NMP concentration monitoring and the real-time performance of detection.

[0015] The second aspect of the present invention provides a high-temperature NMP gas detection and alarm method, which adopts the high-temperature NMP gas detection and alarm device as described above, wherein the method includes: using the acquisition module to collect NMP gas data of the equipment to be monitored according to a preset acquisition period; using the control module based on a preset dynamic mean filtering algorithm, generating a sliding average concentration value according to the NMP gas data of multiple periods collected by the acquisition module, and determining the current alarm level according to the concentration range in which the sliding average concentration value is located, and generating an alarm signal according to the current alarm level; using the alarm module to perform acoustic alarm reminders and optical alarm reminders according to the alarm signal.

[0016] Further, in some embodiments, the current alarm level is determined according to the concentration interval in which the sliding average concentration value is located, and an alarm signal is generated according to the current alarm level, including: when the sliding average concentration value is in the first concentration interval, the current alarm level is determined to be the first level, and a shutdown instruction is generated according to the first level; when the sliding average concentration value is in the second concentration interval, the current alarm level is determined to be the second level, and a red light warning instruction is generated according to the second level; when the sliding average concentration value is in the third concentration interval, the current alarm level is determined to be the third level, and a yellow light warning instruction is generated according to the third level; wherein the urgency of the first level is greater than the urgency of the second level, and the urgency of the second level is greater than the urgency of the third level.

[0017] Furthermore, in some embodiments, determining the current alarm level according to the concentration interval in which the sliding average concentration value is located, and generating an alarm signal according to the current alarm level, further includes: generating an exhaust signal when the current alarm level is the second level.

[0018] Furthermore, in some embodiments, the above-mentioned high-temperature NMP gas detection and alarm method further includes: performing an exhaust action according to the exhaust signal.

[0019] Furthermore, in some embodiments, the above-mentioned high-temperature NMP gas detection and alarm method also includes: uploading the NMP gas data of the multiple cycles to a preset cloud, and / or, sending the alarm signal to the alarm module, and / or, sending the exhaust signal to the exhaust system.

[0020] Furthermore, in some embodiments, determining the current alarm level based on the concentration range in which the sliding average concentration value is located, and generating an alarm signal based on the current alarm level, also includes: after the communication module receives the encrypted firmware upgrade package, decrypting the encrypted firmware upgrade package through AES-256, and completing the remote OTA upgrade based on the decryption result.

[0021] Furthermore, in some embodiments, the above-mentioned high-temperature NMP gas detection and alarm method further includes: displaying the real-time NMP concentration, the sliding average concentration value and the current alarm level; and powering the acquisition module and the control module.

[0022] According to the high-temperature NMP gas detection and alarm method provided by an embodiment of the present invention, NMP gas data of the monitored equipment is collected through an NMP sensor connected by a high-temperature resistant shielded cable according to a preset collection cycle. Based on the dynamic mean filtering algorithm, a sliding average concentration value is generated based on the NMP gas data collected over multiple cycles, the current alarm level is determined, and a real-time alarm is issued. This solves the problem of large monitoring errors caused by the need for traditional catalytic combustion sensors to be directly exposed to a high-temperature gas environment in the related art and the problem of being unable to achieve real-time detection due to the split design, thereby improving the accuracy of NMP concentration monitoring and the real-time performance of detection.

[0023] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A block diagram of a high-temperature NMP gas detection and alarm device provided according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the architecture of an NMP gas detection and alarm device provided according to a specific embodiment of the present invention;

[0027] Figure 3 A flow chart of an NMP gas detection and alarm method according to a specific embodiment of the present invention;

[0028] Figure 4The present invention provides a flow chart of a high-temperature NMP gas detection and alarm method. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0030] The following describes, with reference to the accompanying drawings, a high-temperature NMP gas detection and alarm device and gas detection and alarm method according to embodiments of the present invention. To address the issues mentioned in the background art above, such as the large monitoring errors caused by the need for direct exposure to a high-temperature gas environment and the inability to achieve real-time detection due to a split-body design, the present invention provides a high-temperature NMP gas detection and alarm device. This device addresses the issues of the need for direct exposure to a high-temperature gas environment and the inability to achieve real-time detection due to a split-body design, thereby improving the accuracy of NMP concentration monitoring and the real-time performance of detection.

[0031] Specifically, Figure 1 The block diagram is a high-temperature NMP gas detection and alarm device provided according to an embodiment of the present invention.

[0032] like Figure 1 As shown, the high-temperature NMP gas detection and alarm device 10 includes: a collection module 100, a control module 200 and an alarm module 300.

[0033] Among them, the acquisition module 100 is used to collect NMP gas data of the equipment to be monitored according to a preset acquisition period; the control module 200 is used to generate a sliding average concentration value based on the preset dynamic mean filtering algorithm according to the NMP gas data of multiple periods collected by the acquisition module 100, and determine the current alarm level according to the concentration range in which the sliding average concentration value is located, and generate an alarm signal according to the current alarm level; the alarm module 300 is used to perform acoustic alarm reminders and optical alarm reminders according to the alarm signal.

[0034] For example, the acquisition module 100 can use an NMP sensor (such as a high-temperature direct-plug NDIR sensor) and be connected to the control module 200 via a high-temperature resistant shielded cable (such as a silver-plated copper core + polytetrafluoroethylene insulation layer). In addition, a seal (such as a ceramic seal) can be configured at the sensor interface, and data is continuously collected 100 times according to a 10ms sampling period. The input signal range is 0-5V, and after ADC conversion, a 0-100% LEL concentration value is generated to obtain the NMP gas data of the monitored equipment. It should be noted that the sampling period, holding time, and average averaging times of the sensor can be set by the processor; the alarm module 300 can be a built-in buzzer (85dB@1m) or an RGB LED light strip, which synchronously activates sound and light to warn when an alarm signal is received.

[0035] Further, in some embodiments, the control module 200 includes: a data processing unit 201, which is used to generate a sliding average concentration value based on a preset dynamic mean filtering algorithm according to the NMP gas data of multiple cycles collected by the acquisition module; a determination unit 202, which is used to determine that the current alarm level is the first level when the sliding average concentration value is in the first concentration interval, the current alarm level is the second level when the sliding average concentration value is in the second concentration interval, and the current alarm level is the third level when the sliding average concentration value is in the third concentration interval, wherein the urgency of the first level is greater than the urgency of the second level, and the urgency of the second level is greater than the urgency of the third level; a first generation unit 203, which is used to generate a shutdown instruction according to the first level, a red light warning instruction according to the second level, and a yellow light warning instruction according to the third level.

[0036] For example, the data processing unit 201 continuously collects data 100 times with a sampling period of 10ms, removes ±3σ outliers and takes a sliding average to reduce noise interference (error <±2%LEL), and uses the built-in NMP sensor temperature-sensitivity relationship model (such as polynomial fitting) to dynamically correct the concentration value according to the real-time temperature (for example, through PT100 temperature measurement) to obtain a sliding average concentration value.

[0037] It should be noted that users can customize multi-level alarm thresholds through the touch screen or cloud platform, and the system automatically generates a 4-20mA linear mapping curve.

[0038] Furthermore, the determination unit 202 determines the current alarm level according to the interval in which the sliding average concentration value is located. For example, when the concentration is greater than 80% LEL, the current alarm level is determined to be the first level; when the concentration is greater than 50% LEL and the concentration is less than 80% LEL, the current alarm level is determined to be the second level; when the concentration is less than 50% LEL, the current alarm level is determined to be the third level.

[0039] Furthermore, the first generation unit 203 generates corresponding instructions according to the current alarm level. For example, when it is determined that the current alarm level is the first level, a shutdown instruction is generated, and the shutdown instruction is sent to the coating machine via Modbus. When it is determined that the current alarm level is the second level, a red light warning instruction is generated, and the red light flashes and the alarm is reminded through the built-in buzzer or RGBLED light strip in the alarm module 300. When it is determined that the current alarm level is the third level, a yellow light warning instruction is generated, and the yellow light flashes and the alarm is reminded through the built-in buzzer or RGB LED light strip in the alarm module 300.

[0040] Furthermore, in some embodiments, the control module 200 further includes: a second generating unit 204, configured to generate an exhaust signal when the current alarm level is the second level.

[0041] Furthermore, in some embodiments, the high-temperature NMP gas detection and alarm device 10 further includes: an exhaust system 400 for performing an exhaust action according to an exhaust signal.

[0042] Furthermore, in some embodiments, the high-temperature NMP gas detection and alarm device 10 also includes: a communication module 500, which is used to upload multiple cycles of NMP gas data to a preset cloud, and / or send an alarm signal to the alarm module 300, and / or send an exhaust signal to the exhaust system 400.

[0043] In some embodiments, the communication module 500 integrates a 4G wireless transmission module, a 5G wireless transmission module, an RS485 wired communication module and a CAN industrial bus.

[0044] Specifically, the communication module 500 integrates a multi-protocol transceiver, including RS485 (Modbus RTU protocol) to link with the coating machine PLC, trigger the exhaust fan speed regulation (±10% air volume / second), and the CAN 2.0B interface connects to the workshop MES system to synchronize process parameters in real time. The 4G / 5G module (such as Quectel EC200T) enables data to be uploaded to the cloud platform (such as Alibaba Cloud IoT), with a response time of less than 2s.

[0045] Furthermore, in some embodiments, the control module 200 further includes: an upgrade unit 205, which is used to decrypt the encrypted firmware upgrade package through AES-256 after the communication module 500 receives the encrypted firmware upgrade package, and complete the remote OTA upgrade based on the decryption result.

[0046] Specifically, engineers update algorithms or adjust explosion lines through OTA without on-site intervention. They receive encrypted firmware packages via 4G / 5G, decrypt them using AES-256, and write them to the backup partition. After verification, they switch to the new version. The upgrade process takes ≤30 seconds. It should be noted that if the upgrade fails, it will automatically restore to the previous stable version to ensure system continuity.

[0047] Furthermore, in some embodiments, the high-temperature NMP gas detection and alarm device 10 further includes: a display module 600 for displaying real-time NMP concentration, sliding average concentration value, and current alarm level; and a power supply module 700 for powering the acquisition module 100 and the control module 200.

[0048] Specifically, the display module 600 can use a TFT LCD screen to display real-time concentration (resolution 0.1% LEL), explosion line threshold (multiple levels can be set, such as 80% yellow light warning, 100% red light alarm) and transmission current value (4-20mA). The power supply module 700 uses a wide voltage input DC-DC converter (input 5-28V, output 3.3V / 5V), supports reverse connection protection and overvoltage / undervoltage shutdown, and the power consumption is ≤3W.

[0049] Furthermore, in order to adapt to high-temperature environments, the shell of the high-temperature NMP gas detection and alarm device adopts an IP66 protection grade stainless steel shell, filled with high-temperature resistant silicone (resistant to 200°C), built-in aluminum heat dissipation fins and micro vortex fans to ensure that the temperature of the main control board is ≤70°C, and the sensor is directly inserted into the center of the oven exhaust duct through a flange (JIS B2220 standard) (insertion depth 250mm) to ensure representative detection. At the same time, multiple devices are connected in series through RS485 to cover the entire baking area of ​​the coating machine (for example, one detection point is arranged every 2 meters).

[0050] In addition, the performance indicators were tested through experiments. Among them, in a comparison test with standard gas (NMP50%LEL) at 150°C, the error was <±3%LEL, the response time was: T90≤8s (better than the 25s of the traditional catalytic combustion sensor), after 1000 hours of continuous operation, the zero point drift was <±1%FS, and the packet loss rate of the 4G module was <0.1% in the range of -40°C to 85°C, which proved the effectiveness of the present invention.

[0051] In order to enable relevant technical personnel in this field to better understand the NMP gas detection alarm device of the embodiment of the present invention, it will be described in detail below with reference to specific embodiments.

[0052] Figure 2 This is a schematic diagram of the architecture of an NMP gas detection and alarm device provided according to a specific embodiment of the present invention. Figure 3The present invention provides a flow chart of an NMP gas detection and alarm method according to a specific embodiment of the present invention.

[0053] like Figure 2 As shown in the figure, the architecture of the NMP gas detection and alarm device includes a power module, an N / P sensor, an ARM processor, a transmission circuit, a cloud server and a baking device, wherein the power module provides 24V and 5V power supplies, which are converted into 5V and 3.3V by a linear LDO power supply to power the entire system; the N / P sensor is used to sense relevant physical quantities, and converts the analog signal into a digital signal through ADC (analog-to-digital conversion) and transmits it to the ARM processor; it can also interact with the ARM processor through the I2C communication protocol; the ARM processor, as the core of the system, receives N / P sensor data for processing, communicates with the transmission circuit through the SPI protocol, and can also communicate with the cloud server with the help of the 4G / 5G network to realize functions such as data uploading; the transmission circuit receives ARM processor data, performs signal conditioning and other processing, and outputs a signal suitable for use by subsequent equipment. The cloud server receives ARM processor data through 4G / 5G, and can perform storage, analysis and other operations to realize remote monitoring and management; the baking equipment is controlled according to the output signal of the transmission circuit to realize the adjustment of parameters such as temperature.

[0054] like Figure 3 As shown, the device is powered on and starts up, drawing power from the grid, reading the EEPROM information, and performing a self-check. If the self-check fails, the process ends; if it passes, the process proceeds to the next step. If the self-check fails, it repeats itself and receives information through the communication module. The crystal oscillator activates, providing a clock signal for the system. Simultaneously, the system's core processor starts processing various tasks. The voltage and current of the charging station are monitored in real time, and the detected data, such as voltage and current, is analyzed and processed. Data is exchanged with the substation and dispatch center, transmitting detected and processed data. Based on the data processing results, a dispatch signal is determined. If overvoltage, overcurrent, or a startup anomaly occurs, a relay is triggered. If normal, a dispatch signal is sent to the charging station.

[0055] According to the high-temperature NMP gas detection and alarm device provided by an embodiment of the present invention, according to a preset collection cycle, an NMP sensor connected by a high-temperature resistant shielded cable collects NMP gas data of the monitored equipment. Based on a dynamic mean filtering algorithm, a sliding average concentration value is generated based on the NMP gas data collected over multiple cycles, the current alarm level is determined, and a real-time alarm is issued. This solves the problem of large monitoring errors caused by the need for traditional catalytic combustion sensors in related technologies to be directly exposed to a high-temperature gas environment and the problem of being unable to achieve real-time detection due to a split design, thereby improving the accuracy of NMP concentration monitoring and the real-time performance of detection.

[0056] Next, a high-temperature NMP gas detection and alarm method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0057] Figure 4 The present invention provides a flow chart of a high-temperature NMP gas detection and alarm method.

[0058] like Figure 4 As shown, the high-temperature NMP gas detection and alarm method includes the following steps:

[0059] In step S401, the NMP gas data of the equipment to be monitored is collected by the collection module according to a preset collection period.

[0060] In step S402, the control module generates a sliding average concentration value based on the preset dynamic mean filtering algorithm according to the NMP gas data of multiple cycles collected by the acquisition module, determines the current alarm level according to the concentration range in which the sliding average concentration value is located, and generates an alarm signal according to the current alarm level.

[0061] In step S403, an alarm module performs acoustic alarm and optical alarm according to the alarm signal.

[0062] Further, in some embodiments, the current alarm level is determined according to the concentration interval in which the sliding average concentration value is located, and an alarm signal is generated according to the current alarm level, including: when the sliding average concentration value is in the first concentration interval, the current alarm level is determined to be the first level, and a shutdown instruction is generated according to the first level; when the sliding average concentration value is in the second concentration interval, the current alarm level is determined to be the second level, and a red light warning instruction is generated according to the second level; when the sliding average concentration value is in the third concentration interval, the current alarm level is determined to be the third level, and a yellow light warning instruction is generated according to the third level; wherein the urgency of the first level is greater than the urgency of the second level, and the urgency of the second level is greater than the urgency of the third level.

[0063] Furthermore, in some embodiments, the current alarm level is determined according to the concentration interval in which the sliding average concentration value is located, and an alarm signal is generated according to the current alarm level, and further includes: generating an exhaust signal when the current alarm level is the second level.

[0064] Furthermore, in some embodiments, the high-temperature NMP gas detection and alarm method further includes: performing an exhaust action according to the exhaust signal.

[0065] Furthermore, in some embodiments, the high-temperature NMP gas detection alarm method further includes: uploading multiple cycles of NMP gas data to a preset cloud, and / or, sending an alarm signal to an alarm module, and / or, sending an exhaust signal to an exhaust system.

[0066] Furthermore, in some embodiments, the current alarm level is determined based on the concentration range in which the sliding average concentration value is located, and an alarm signal is generated based on the current alarm level. It also includes: after the communication module receives the encrypted firmware upgrade package, the encrypted firmware upgrade package is decrypted by AES-256, and the remote OTA upgrade is completed based on the decryption result.

[0067] Furthermore, in some embodiments, the high-temperature NMP gas detection and alarm method further includes: displaying the real-time NMP concentration, the sliding average concentration value, and the current alarm level; and supplying power to the acquisition module and the control module.

[0068] It should be noted that the above explanation of the embodiment of the high-temperature NMP gas detection and alarm device is also applicable to the high-temperature NMP gas detection and alarm method of this embodiment, and will not be repeated here.

[0069] According to the high-temperature NMP gas detection and alarm method proposed in an embodiment of the present invention, according to a preset collection cycle, an NMP sensor connected by a high-temperature resistant shielded cable collects NMP gas data of the monitored equipment. Based on a dynamic mean filtering algorithm, a sliding average concentration value is generated based on the NMP gas data collected over multiple cycles, the current alarm level is determined, and a real-time alarm is issued. This solves the problem of large monitoring errors caused by the need for traditional catalytic combustion sensors to be directly exposed to a high-temperature gas environment in related technologies and the problem of being unable to achieve real-time detection due to a split design, thereby improving the accuracy of NMP concentration monitoring and the real-time performance of detection.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0072] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a custom logical function or step of a process, and the scope of the preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of the invention pertain.

[0073] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logic functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0074] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

Claims

1. A high-temperature NMP gas detection and alarm device, characterized in that: include: Acquisition module, alarm module and control module, among which, The acquisition module is used to collect NMP gas data of the equipment to be monitored according to a preset acquisition cycle; a control module, configured to generate a sliding average concentration value based on a preset dynamic mean filtering algorithm and the NMP gas data of multiple cycles collected by the collection module, determine a current alarm level based on a concentration interval within which the sliding average concentration value falls, and generate an alarm signal based on the current alarm level; The alarm module is used to perform acoustic alarm reminders and optical alarm reminders according to the alarm signal.

2. The high-temperature NMP gas detection and alarm device according to claim 1, characterized in that: The control module includes: A data processing unit, configured to generate a sliding average concentration value based on a preset dynamic mean filtering algorithm and the NMP gas data of multiple cycles collected by the collection module; a determining unit, configured to determine, when the sliding average concentration value is in a first concentration interval, the current alarm level as a first level, when the sliding average concentration value is in a second concentration interval, the current alarm level as a second level, and when the sliding average concentration value is in a third concentration interval, the current alarm level as a third level, wherein the urgency of the first level is greater than the urgency of the second level, and the urgency of the second level is greater than the urgency of the third level; The first generating unit is configured to generate a shutdown instruction according to the first level, generate a red light warning instruction according to the second level, and generate a yellow light warning instruction according to the third level.

3. The high-temperature NMP gas detection and alarm device according to claim 2, characterized in that: The control module further includes: The second generating unit is configured to generate an exhaust signal when the current alarm level is the second level.

4. The high-temperature NMP gas detection and alarm device according to claim 3, characterized in that: Also includes: The exhaust system is used to perform exhaust actions according to the exhaust signal.

5. The high-temperature NMP gas detection and alarm device according to claim 4, characterized in that: Also includes: A communication module is used to upload the NMP gas data of the multiple cycles to a preset cloud, and / or send the alarm signal to the alarm module, and / or send the exhaust signal to the exhaust system.

6. The high-temperature NMP gas detection and alarm device according to claim 5, characterized in that: The communication module integrates a 4G wireless transmission module, a 5G wireless transmission module, an RS485 wired communication module and a CAN industrial bus.

7. The high-temperature NMP gas detection and alarm device according to claim 5, characterized in that: The control module further includes: The upgrade unit is used to decrypt the encrypted firmware upgrade package through AES-256 after the communication module receives the encrypted firmware upgrade package, and complete the remote OTA upgrade based on the decryption result.

8. The high-temperature NMP gas detection and alarm device according to claim 3, characterized in that: Also includes: A display module is used to display the real-time NMP concentration, the sliding average concentration value and the current alarm level; a power supply module is used to supply power to the acquisition module and the control module.

9. A high-temperature NMP gas detection and alarm method, characterized in that: A high-temperature NMP gas detection and alarm device according to any one of claims 1 to 8 is used, wherein the method comprises the following steps: The NMP gas data of the equipment to be monitored is collected by the collection module according to a preset collection period; generating, by the control module, a sliding average concentration value based on a preset dynamic mean filtering algorithm according to the NMP gas data of multiple cycles collected by the collection module, determining a current alarm level according to a concentration range in which the sliding average concentration value is located, and generating an alarm signal according to the current alarm level; The alarm module performs acoustic and optical alarm reminders according to the alarm signal.

10. The method according to claim 9, characterized in that The determining of the current alarm level according to the concentration interval in which the sliding average concentration value is located, and generating an alarm signal according to the current alarm level, includes: When the sliding average concentration value is in a first concentration interval, determining that the current alarm level is a first level, and generating a shutdown instruction according to the first level; When the sliding average concentration value is in a second concentration interval, determining that the current alarm level is a second level, and generating a red light warning instruction according to the second level; When the sliding average concentration value is in a third concentration interval, determining that the current alarm level is the third level, and generating a yellow light warning instruction according to the third level; The first level of urgency is greater than the second level of urgency, and the second level of urgency is greater than the third level of urgency.

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