Intelligent fire extinguishing system for machine tool

Abstract

The invention relates to the technical field of industrial safety, in particular to an intelligent machine tool fire extinguishing system which comprises a fire detection module, a data processing module, a fire type recognition module, a fire extinguishing control module, a man-machine interaction module and a power failure guarantee module. Wherein the fire detection module is used for monitoring multi-dimensional data of a working environment of a machine tool in real time; the data processing module is used for identifying different types of fire features; the fire type identification module is used for identifying the specific type of the fire; the fire extinguishing control module automatically selects a corresponding fire extinguishing medium; the man-machine interaction module is used for sending an alarm signal to an operator when a fire disaster occurs; and the power-off guarantee module is used for automatically cutting off a machine tool power supply when a fire occurs. According to the invention, through the technologies of intelligent fire identification, accurate fire source positioning and timely power cut-off, the fire extinguishing efficiency is effectively improved, early fire control is ensured, and secondary disasters are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial safety, and in particular to an intelligent fire extinguishing system for machine tools. Background Art

[0002] With the continuous advancement of industrial manufacturing automation, machine tools have become the core equipment of modern manufacturing. However, since machine tools generate a lot of heat, sparks, dust and oil substances during operation, these factors can easily cause fires. In addition, modern machine tools are often in a high-load, high-speed operation state when working. Once a fire occurs, its rapid spread and the secondary disasters it causes will cause huge damage to personnel safety and production equipment. Therefore, in the working environment of machine tools, equipping with intelligent fire detection and fire extinguishing systems has become the key to ensuring the safety of equipment and personnel.

[0003] There are many problems with the existing machine tool fire detection and extinguishing systems, which are mainly manifested in the following aspects: First, the existing system is not capable of identifying different types of fires and cannot effectively distinguish between electrical fires, oil fires or solid fires, resulting in improper selection of fire extinguishing measures and failure to quickly extinguish the fire; second, most of the existing fire extinguishing systems are passive responses, lacking accurate positioning of the fire location and targeted fire extinguishing functions, and the fire extinguishing effect is poor; finally, the traditional system fails to cut off the power supply of the machine tool in time when a fire occurs, which is prone to electrical failures or secondary fires. Therefore, an intelligent machine tool fire extinguishing system is urgently needed to solve the above problems. Summary of the invention

[0004] Based on the above objectives, the present invention provides an intelligent fire extinguishing system for machine tools.

[0005] An intelligent fire extinguishing system for machine tools, comprising a fire detection module, a data processing module, a fire type identification module, a fire extinguishing control module, a human-computer interaction module and a power failure protection module; wherein:

[0006] Fire detection module: used to monitor the multi-dimensional data of temperature, smoke and flame in the working environment of the machine tool in real time through a variety of sensors, including temperature sensors, photoelectric sensors and gas sensors;

[0007] Data processing module: connected to the fire detection module, used to receive and analyze the multi-dimensional data collected by the fire detection module, identify different types of fire characteristics, and generate preliminary fire judgment results;

[0008] Fire type identification module: connected to the data processing module, based on the preset fire feature library, conducts in-depth analysis of the preliminary fire judgment results to identify the specific types of fires, including electrical fires, oil fires and solid fires;

[0009] Fire extinguishing control module: connected to the fire type identification module, automatically selects the corresponding fire extinguishing medium according to the identified fire type, the fire extinguishing medium includes dry powder fire extinguishing agent, carbon dioxide fire extinguishing agent and water-based fire extinguishing agent, and realizes fixed-point fire extinguishing through injection control;

[0010] Human-computer interaction module: connected to the fire extinguishing control module, used to send an alarm signal to the operator when a fire occurs, and provide real-time feedback information of the fire extinguishing process, so that the operator can manually intervene in the fire extinguishing process according to the feedback information;

[0011] Power-off protection module: used to automatically cut off the power supply of the machine tool when a fire occurs to prevent the occurrence of a secondary fire.

[0012] Optionally, the fire detection module includes a temperature monitoring unit, a smoke monitoring unit and a flame monitoring unit; wherein:

[0013] Temperature monitoring unit: used to install the temperature sensor near the heat source in the working environment of the machine tool, using infrared temperature measurement technology to monitor temperature changes in real time in a non-contact manner. The temperature sensor can also collect temperature data in the environment at preset time intervals and transmit the temperature data to the data processing module through wired or wireless communication;

[0014] Smoke monitoring unit: used to distribute gas sensors in predetermined areas within the working environment of the machine tool, especially in places where air circulation is poor or smoke is easy to accumulate; the gas sensor continuously collects the concentration values ​​of smoke particles and harmful gases in the ambient air through electrochemical or semiconductor detection methods; the gas sensor specifically samples the gas concentration at a predetermined frequency and transmits the sampled data to the data processing module;

[0015] Flame monitoring unit: used to install the photoelectric sensor above the working area of ​​the machine tool, and adopt spectral analysis technology to monitor the flame by sensing the changes in the light intensity and wavelength released by the flame. It can monitor the changes in the light signal in real time and transmit the light intensity data in the form of digital signals to the data processing module.

[0016] Optionally, the data processing module includes a data receiving unit, a data preprocessing unit, a data analysis unit and a fire judgment unit; wherein:

[0017] Data receiving unit: used to receive multi-dimensional data transmitted by the fire detection module through wired or wireless means, including temperature changes, gas concentration and light intensity signals;

[0018] Data preprocessing unit: used to preprocess the received multi-dimensional data, clean up invalid data through noise filtering and outlier removal operations, and standardize the data to unify the data dimension;

[0019] Data analysis unit: after receiving the pre-processed data, it dynamically analyzes the changing trends of temperature, smoke density and flame signal according to the preset safety threshold and historical data, and when the data fluctuation exceeds the preset threshold and shows abnormality, it marks the data as fire characteristics and transmits it to the fire judgment unit;

[0020] Fire judgment unit: Based on the abnormal data provided by the data analysis unit, the probability of fire occurrence is evaluated. When the abnormal data reaches the predetermined fire characteristic threshold, the fire occurrence is confirmed and a preliminary fire judgment result is generated.

[0021] Optionally, the data analysis unit specifically includes:

[0022] Data initialization: After receiving the pre-processed multi-dimensional data, the initial state of temperature, smoke concentration and flame signal is recorded first, and a safety threshold is set for each signal to determine whether there is an abnormality later;

[0023] Dynamic data monitoring: Receive the current data from the fire detection module in real time, including the current temperature, smoke concentration and light intensity, and monitor the changes in the current data, especially the change range of these data per unit time, to determine whether the data is changing rapidly;

[0024] Trend analysis: Analyze the changing trend of data and evaluate whether the current data changes beyond the safe range in combination with the changing pattern of historical data; if the temperature shows a rapid rise, the smoke concentration increases significantly, or the flame signal increases sharply, it will be marked as abnormal;

[0025] Abnormal data marking: When the change of one or more data exceeds the set safety threshold, the corresponding data will be marked as fire characteristic data;

[0026] Transfer to the fire judgment unit: All fire characteristic data marked as abnormal are transferred to the fire judgment unit.

[0027] Optionally, the fire judgment unit specifically includes:

[0028] Receiving abnormal data: The fire judgment unit first receives the abnormal data transmitted by the data analysis unit, including the mark values ​​of abnormal temperature, abnormal smoke density and abnormal flame signal;

[0029] Determine the abnormal weight: Set different weights according to the importance of each abnormal data. Suppose the weights of temperature, smoke and flame signals are w and w respectively. T 、w C and w L , the sum of weights is 1;

[0030] Calculate the abnormal probability of each feature: Calculate the probability of fire occurrence for each abnormal data exceeding the limit, assuming that the current value of each data is x T 、x C 、x L , the corresponding preset safety threshold is T max , C max and L max, , then the abnormal probability of each data is calculated according to the following formula: Among them, P T , P C and P L They represent the abnormal degree of temperature, smoke density and flame signal respectively, and the value varies between 0 and 1;

[0031] Calculation of comprehensive fire probability: The abnormal probability of each feature is weighted and summed according to the weight to calculate the comprehensive probability of fire occurrence P fire ; The formula is: P fire =w T ·P T +w C ·P C +w L ·P L , where P fire Represents the comprehensive probability value of fire. The closer the value is to 1, the higher the possibility of fire.

[0032] Fire probability threshold judgment: The calculated fire comprehensive probability is compared with the preset fire confirmation threshold P threshold For comparison, if P fire ≥P threshold , it is confirmed that a fire has occurred.

[0033] Optionally, the fire type identification module includes a feature matching unit, a type analysis unit and a type output unit; wherein:

[0034] Feature matching unit: used to receive the preliminary fire judgment result generated by the fire judgment unit, and match the multi-dimensional fire feature data in the result with the preset fire feature library. During the matching, multiple parameters such as temperature abnormality, smoke concentration characteristics and flame light intensity are compared to find the type that is closest to the current fire feature;

[0035] Type analysis unit: used to confirm the fire type based on the combination and intensity of each fire feature after the feature matching unit completes the preliminary matching. Specifically, when the temperature fluctuates significantly and the smoke concentration is high, it is judged as a solid fire; when the smoke is accompanied by oil and gas components, it is judged as an oil fire; when the flame signal and current fluctuations are abnormal, it is judged as an electrical fire.

[0036] Type output unit: used to output the fire type result to the fire extinguishing control module of the system after the type analysis unit confirms the fire type, so as to trigger the fire extinguishing measures of the corresponding type of fire.

[0037] Optionally, the fire extinguishing control module includes a fire extinguishing medium selection unit, an injection control unit and a fixed-point fire extinguishing unit; wherein:

[0038] Fire extinguishing medium selection unit: used to automatically select suitable fire extinguishing materials from the preset fire extinguishing media according to the fire type results provided by the fire type identification module. Specifically, when a solid fire is identified, a water-based fire extinguishing agent is selected for fire extinguishing; when an oil fire is identified, a carbon dioxide fire extinguishing agent is selected; when an electrical fire is identified, a dry powder fire extinguishing agent is selected;

[0039] Spray control unit: used to adjust spray parameters, including spray velocity, angle and range, according to the location of the fire and the spread of the fire, to ensure that the fire extinguishing medium can accurately cover the fire source area;

[0040] Fixed-point fire extinguishing unit: used to locate the specific location of the fire, and to spray the fire extinguishing medium to the fire source area through the fire extinguishing nozzles or nozzles set around the working area of ​​the machine tool to achieve fixed-point fire extinguishing.

[0041] Optionally, the fixed-point fire extinguishing unit specifically includes:

[0042] Receive fire source location data: Receive real-time data from the fire detection module and data processing module, including temperature anomaly location, smoke concentration distribution and flame signal intensity;

[0043] Calculate the center of the fire source: Determine the center of the fire source by weighting the abnormal data detected by each sensor;

[0044] Determine the spray direction and angle: Calculate the spray direction and angle based on the center position coordinates of the fire source and the current position coordinates of the fire extinguishing nozzle;

[0045] Adjusting the spray parameters: After determining the spray direction and angle, the fixed-point fire extinguishing unit adjusts the spray parameters, including the spray flow rate and pressure, according to the distance from the fire source to the nozzle and the intensity of the fire.

[0046] Optionally, the human-computer interaction module includes an alarm unit, a feedback display unit and a manual intervention unit; wherein:

[0047] Alarm unit: used to send an alarm signal to the operator immediately after the fire judgment unit confirms the occurrence of a fire. The alarm signal is sent in a variety of ways, including sound and light alarms, vibration prompts, or alarms sent to remote terminals;

[0048] Feedback display unit: During the fire extinguishing process, it is used to provide the operator with real-time information on the working status of the fire extinguishing system. Specifically, the screen displays various parameters during the fire extinguishing process, including the spray status of the fire extinguishing medium, the change in the location of the fire source, the temperature change trend, and the information on the fire extinguishing effect. The feedback display unit can also present the real-time data of each sensor, including the current temperature, smoke concentration, and flame intensity.

[0049] Manual intervention unit: It is used to provide the operator with the ability to manually intervene in the fire extinguishing process in an emergency. When the automatic fire extinguishing system cannot effectively control the fire, the operator can adjust the fire extinguishing operation through the manual control interface, including changing the injection flow rate, adjusting the injection direction or changing the selection of the fire extinguishing medium.

[0050] Optionally, the power failure protection module includes a fire monitoring unit, a power failure control unit and a power supply cut-off unit; wherein:

[0051] Fire signal receiving unit: used to monitor the fire occurrence signal provided by the fire judgment unit in real time. Once the fire judgment unit confirms the occurrence of a fire, it will immediately trigger a power-off operation;

[0052] Power-off control unit: connected to the fire monitoring unit, used to automatically start the power-off process after receiving the fire confirmation signal, by controlling the power circuit breaker or relay device to switch it to the disconnected state, to ensure that the power supply of the machine tool is immediately interrupted when a fire occurs;

[0053] Power cut-off unit: directly connected to the power-off control unit, used to perform the physical disconnection operation of the power supply, and completely cut off the main power supply and auxiliary power supply of the machine tool through an electrical switch or circuit breaker to ensure that the machine tool no longer has any power supply when a fire occurs.

[0054] Beneficial effects of the present invention:

[0055] The present invention, by introducing intelligent fire identification and control technology, can effectively solve the deficiencies of existing machine tool fire extinguishing systems in fire type identification. Through real-time monitoring and analysis of multi-dimensional fire characteristic data, the system can accurately distinguish between electrical fires, oil fires and solid fires, and quickly select appropriate fire extinguishing measures according to the fire type. This technology greatly improves the fire extinguishing efficiency, reduces the problem of improper fire extinguishing caused by misjudgment, and ensures that the fire can be controlled at an early stage, thereby avoiding greater losses caused by the spread of the fire.

[0056] The present invention greatly improves the accuracy and effect of fire extinguishing by accurately locating the fire source and implementing targeted fire extinguishing. At the same time, it promptly cuts off the power supply of the machine tool when a fire occurs to prevent secondary fires or other secondary disasters caused by electrical failures, thereby enhancing the safety and reliability of the entire system. This technical design significantly improves the safety protection capability of the machine tool in a high-risk working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 A schematic diagram of an intelligent fire extinguishing system for machine tools according to an embodiment of the present invention;

[0059] Figure 2 Schematic diagram of a data processing module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0061] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0062] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0063] like Figure 1-Figure 2 As shown, a machine tool intelligent fire extinguishing system includes a fire detection module, a data processing module, a fire type identification module, a fire extinguishing control module, a human-computer interaction module and a power failure protection module; wherein:

[0064] Fire detection module: used to monitor the multi-dimensional data of temperature, smoke and flame in the working environment of the machine tool in real time through a variety of sensors, including temperature sensors, photoelectric sensors and gas sensors;

[0065] Data processing module: connected to the fire detection module, used to receive and analyze the multi-dimensional data collected by the fire detection module, identify different types of fire characteristics, and generate preliminary fire judgment results;

[0066] Fire type identification module: connected to the data processing module, based on the preset fire feature library, conducts in-depth analysis of the preliminary fire judgment results to identify the specific types of fires, including electrical fires, oil fires and solid fires;

[0067] Fire extinguishing control module: connected to the fire type identification module, automatically selects the corresponding fire extinguishing medium according to the identified fire type. The fire extinguishing medium includes dry powder fire extinguishing agent, carbon dioxide fire extinguishing agent and water-based fire extinguishing agent, and realizes fixed-point fire extinguishing through injection control;

[0068] Human-computer interaction module: connected to the fire extinguishing control module, used to send an alarm signal to the operator when a fire occurs, and provide real-time feedback information of the fire extinguishing process, so that the operator can manually intervene in the fire extinguishing process according to the feedback information;

[0069] Power-off protection module: used to automatically cut off the power supply of the machine tool when a fire occurs to prevent the occurrence of a secondary fire.

[0070] The fire detection module includes a temperature monitoring unit, a smoke monitoring unit and a flame monitoring unit; wherein:

[0071] Temperature monitoring unit: used to install the temperature sensor near the heat source in the working environment of the machine tool, using infrared temperature measurement technology to monitor temperature changes in real time in a non-contact manner. The temperature sensor can also collect temperature data in the environment at preset time intervals and transmit the temperature data to the data processing module through wired or wireless communication to ensure timely detection of high temperature or abnormal temperature fluctuations;

[0072] Smoke monitoring unit: used to distribute gas sensors in predetermined areas within the working environment of the machine tool, especially in places where air circulation is poor or smoke is prone to accumulate; the gas sensor continuously collects the concentration values ​​of smoke particles and harmful gases in the ambient air through electrochemical or semiconductor detection methods; the gas sensor specifically samples the gas concentration at a predetermined frequency and transmits the sampled data to the data processing module to ensure that an early warning is generated when the concentration exceeds the threshold;

[0073] Flame monitoring unit: used to install the photoelectric sensor above the working area of ​​the machine tool, adopt spectral analysis technology, and monitor the flame by sensing the light intensity and wavelength changes released by the flame. It can monitor the changes of the light signal in real time and transmit the light intensity data in the form of digital signals to the data processing module for further analysis of whether there is a flame; through the combination of temperature monitoring unit, smoke monitoring unit and flame monitoring unit, it can comprehensively monitor the key fire characteristic data in the working environment of the machine tool. The monitoring data of these units ensure that the subsequent processing modules can quickly respond to different types of fire hazards.

[0074] The data processing module includes a data receiving unit, a data preprocessing unit, a data analysis unit and a fire judgment unit; wherein:

[0075] Data receiving unit: used to receive multi-dimensional data transmitted by the fire detection module through wired or wireless means, including temperature changes, gas concentration and light intensity signals;

[0076] Data preprocessing unit: used to preprocess the received multi-dimensional data, clean up invalid data through noise filtering and outlier removal operations, and standardize the data to unify the data dimension;

[0077] Data analysis unit: after receiving the pre-processed data, it dynamically analyzes the changing trends of temperature, smoke density and flame signal according to the preset safety threshold and historical data, and when the data fluctuation exceeds the preset threshold and shows abnormality, it marks the data as fire characteristics and transmits it to the fire judgment unit;

[0078] Fire judgment unit: Based on the abnormal data provided by the data analysis unit, the probability of fire occurrence is evaluated. When the abnormal data reaches the predetermined fire characteristic threshold, the fire occurrence is confirmed, a preliminary fire judgment result is generated, and the result is transmitted to the fire type identification module for subsequent fire type classification processing.

[0079] The data analysis unit specifically includes:

[0080] Data initialization: After receiving the pre-processed multi-dimensional data, the initial state of temperature, smoke concentration and flame signal is recorded first, and safety thresholds are set for each signal. These thresholds are set based on historical data and experience data, and are used to determine whether there are abnormalities in the future;

[0081] Dynamic data monitoring: Receive the current data from the fire detection module in real time, including the current temperature, smoke concentration and light intensity, and monitor the changes in the current data, especially the change range of these data per unit time, to determine whether the data is changing rapidly;

[0082] Trend analysis: Analyze the changing trend of data and evaluate whether the current data changes beyond the safe range in combination with the changing pattern of historical data; if the temperature shows a rapid rise, the smoke concentration increases significantly, or the flame signal increases sharply, it will be marked as abnormal;

[0083] Abnormal data marking: When the change of one or more data exceeds the set safety threshold, the corresponding data will be marked as fire characteristic data;

[0084] Transfer to the fire judgment unit: All fire feature data marked as abnormal are transferred to the fire judgment unit, including the current status and abnormality of each data, so that the fire judgment unit can further confirm and process the fire.

[0085] The calculation steps for dynamic analysis and marking fire characteristic data are as follows:

[0086] Step S1: After receiving the pre-processed data, data initialization is first performed to record the temperature value T0, smoke concentration value C0 and light intensity value L0 in the initial state, and set the safety thresholds of each signal to T max , C max and L max ,These thresholds are determined based on historical data models and have reference basis in actual operations;

[0087] Step S2: Receive sensor data in real time and generate a data set at the current time t, which includes the current temperature value T(t), the current smoke concentration C(t) and the current light intensity L(t); for each data item, calculate its rate of change, the formula is: The rate of change is used to determine the speed and trend of data changes;

[0088] Step S3: Based on the change rate of the current data and the trend analysis formula in the historical data, calculate whether there is an obvious increase or fluctuation abnormality in each data; the specific judgment conditions are as follows:

[0089] If the temperature change rate ΔT>ΔT max , it indicates that the temperature rises sharply;

[0090] If the smoke concentration change rate ΔC>ΔC max , it indicates that the smoke concentration has increased abnormally;

[0091] If the light intensity change rate ΔL>ΔL max , indicating that the flame signal is abnormally enhanced; among them, ΔT max , ΔC max and ΔL max The safety change rate thresholds preset for the system are set according to the typical fire data change trends in the historical data model;

[0092] Step S4: When the change rate of any parameter exceeds the preset change rate threshold, that is, ΔT, ΔC or ΔL exceeds its respective threshold, the system marks the data as fire characteristic data and generates a marking signal. The specific marking formula is: M T =1 if ΔT>ΔT max ;M C =1 if ΔC>ΔC max ;M L =1 if ΔL>ΔL max ; Among them, M T 、M C 、M L They are fire marks for temperature, smoke and flame signals respectively. If any value is 1, it means that the corresponding data has shown fire characteristics.

[0093] The fire judgment unit specifically includes:

[0094] Receiving abnormal data: The fire judgment unit first receives the abnormal data transmitted by the data analysis unit. The data includes the mark values ​​of temperature abnormality, smoke density abnormality and flame signal abnormality. Each mark value reflects that the actual situation monitored by the sensor exceeds the preset safety threshold;

[0095] Determine the abnormal weight: Set different weights according to the importance of each abnormal data. Suppose the weights of temperature, smoke and flame signals are w and w respectively. T 、w C and w L ,These weight values ​​can be set according to the commonness and impact of fire types in different environments, and the sum of the weights is 1;

[0096] Calculate the abnormal probability of each feature: Calculate the probability of fire occurrence for each abnormal data exceeding the limit, assuming that the current value of each data is x T 、x C 、x L , the corresponding preset safety threshold is T max , C max and L max, , then the abnormal probability of each data is calculated according to the following formula: Among them, P T , P C and P L They represent the abnormal degree of temperature, smoke density and flame signal respectively, and the value varies between 0 and 1;

[0097] Calculation of comprehensive fire probability: The abnormal probability of each feature is weighted and summed according to the weight to calculate the comprehensive probability of fire occurrence P fire ; The formula is: P fire =w T ·P T +wC ·P C +w L ·P L , where P fire Represents the comprehensive probability value of fire. The closer the value is to 1, the higher the possibility of fire.

[0098] Fire probability threshold judgment: The calculated fire comprehensive probability is compared with the preset fire confirmation threshold P threshold For comparison, if P fire ≥P threshold When the fire has occurred, the fire judgment unit generates a preliminary fire judgment result and transmits the result to the fire type identification module; if P fire If the threshold is not reached, the system continues to monitor and process subsequent data changes; through weight setting and weighted calculation of various abnormal data, the fire judgment unit can accurately assess the probability of fire and make a quick judgment when it exceeds the set fire threshold, providing an important basis for subsequent fire extinguishing measures.

[0099] The fire type recognition module includes a feature matching unit, a type analysis unit and a type output unit; wherein:

[0100] Feature matching unit: used to receive the preliminary fire judgment result generated by the fire judgment unit, and match the multi-dimensional fire feature data in the result with the preset fire feature library. During the matching, multiple parameters such as temperature abnormality, smoke concentration characteristics and flame light intensity are compared to find the type that is closest to the current fire feature;

[0101] Type analysis unit: used to confirm the fire type based on the combination and intensity of each fire feature after the feature matching unit completes the preliminary matching. Specifically, when the temperature fluctuates significantly and the smoke concentration is high, it is judged as a solid fire; when the smoke is accompanied by oil and gas components, it is judged as an oil fire; when the flame signal and current fluctuations are abnormal, it is judged as an electrical fire.

[0102] Type output unit: After the type analysis unit confirms the fire type, it is used to output the fire type result to the system's fire extinguishing control module to trigger fire extinguishing measures for the corresponding type of fire. This unit ensures that the output of the fire type is accurate and provides clear fire category information to the fire extinguishing control module so that it can select the appropriate fire extinguishing medium.

[0103] The fire extinguishing control module includes a fire extinguishing medium selection unit, an injection control unit and a fixed-point fire extinguishing unit; wherein:

[0104] Fire extinguishing medium selection unit: used to automatically select suitable fire extinguishing materials from preset fire extinguishing media according to the fire type results provided by the fire type identification module. Specifically, when a solid fire is identified, a water-based fire extinguishing agent is selected for fire extinguishing; when an oil fire is identified, a carbon dioxide fire extinguishing agent is selected; when an electrical fire is identified, a dry powder fire extinguishing agent is selected. The fire extinguishing medium selection unit ensures that the selection of the fire extinguishing medium matches the characteristics of the fire type to avoid the use of inappropriate fire extinguishing materials;

[0105] Spray control unit: used to adjust spray parameters, including spray flow rate, angle and range, according to the location and spread of the fire, to ensure that the fire extinguishing medium can accurately cover the fire source area; the spray control unit performs this task through an electric control valve or pressure control system to ensure that the fire extinguishing process is efficient and waste-free;

[0106] Fixed-point fire extinguishing unit: used to lock the specific location of the fire, and spray the fire extinguishing medium to the fire source area through the fire extinguishing nozzles or nozzles set around the working area of ​​the machine tool to achieve fixed-point fire extinguishing; the fixed-point fire extinguishing unit ensures that the fire extinguishing medium only acts on the fire source, reducing interference with the equipment and operating environment, while maximizing the fire extinguishing effect; through the coordinated work of the fire extinguishing medium selection unit, the injection control unit and the fixed-point fire extinguishing unit in the fire extinguishing control module, it can automatically select the appropriate fire extinguishing medium according to the identified fire type, and carry out fixed-point fire extinguishing in the fire area through precise injection control, ensuring that the fire extinguishing process is efficient and accurate, and can effectively avoid fire extinguishing misoperation, reduce equipment damage and personal injury.

[0107] The fixed-point fire extinguishing unit specifically includes:

[0108] Receive fire source location data: Receive real-time data from the fire detection module and data processing module, including temperature anomaly location, smoke concentration distribution and flame signal intensity;

[0109] Calculate the center position of the fire source: Determine the center position of the fire source by weighted calculation of the abnormal data detected by each sensor; let the fire source data position detected by the i-th sensor be x i ,y i ,z i , whose signal strength is w i , then the center coordinates of the fire source are: Among them, x center ,y center 、z center are the horizontal, vertical and height coordinates of the center of the fire source, respectively, i represents the signal strength of the i-th sensor, x i ,y i ,z iare the lateral, longitudinal and height positions corresponding to the i-th sensor respectively;

[0110] Determine the spray direction and angle: Calculate the spray direction and angle based on the center coordinates of the fire source and the current position coordinates of the fire extinguishing nozzle; let the current position of the nozzle be x nozzle ,y nozzle 、z nozzle , then the calculation formula for the horizontal angle θ and vertical angle φ of the injection direction is: Among them, θ is the horizontal spray angle of the nozzle, φ is the vertical spray angle of the nozzle, and x nozzle, y nozzle, z nozzle is the horizontal, vertical and height coordinates of the current position of the nozzle;

[0111] Adjusting the spraying parameters: After determining the spraying direction and angle, the fixed-point fire extinguishing unit adjusts the spraying parameters, including the spraying flow rate and pressure, according to the distance from the fire source to the nozzle and the intensity of the fire, to ensure that the fire extinguishing medium can effectively cover the fire source area; through the fire source position data processing, spraying angle calculation and spraying parameter adjustment of the fixed-point fire extinguishing unit, the system can accurately lock the fire source position and perform fixed-point fire extinguishing operations, ensuring that the fire extinguishing medium effectively covers the fire source, reducing the risk of fire spread, and improving fire extinguishing efficiency.

[0112] The human-computer interaction module includes an alarm unit, a feedback display unit and a manual intervention unit; wherein:

[0113] Alarm unit: used to send an alarm signal to the operator immediately after the fire judgment unit confirms the occurrence of a fire. The alarm signal is sent in a variety of ways, including sound and light alarms, vibration prompts, or alarms sent to remote terminals. The sound and light alarm sends obvious sound and visual prompts through the speaker and flash light on the machine tool operation panel to ensure that the operator can detect the occurrence of a fire in time;

[0114] Feedback display unit: During the fire extinguishing process, it is used to provide the operator with real-time information on the working status of the fire extinguishing system. Specifically, the screen displays various parameters during the fire extinguishing process, including the spraying status of the fire extinguishing medium, the change in the location of the fire source, the temperature change trend, and the information on the fire extinguishing effect. The feedback display unit can also present the real-time data of each sensor, including the current temperature, smoke concentration, and flame intensity, to help the operator fully understand the fire extinguishing situation.

[0115] Manual intervention unit: used to provide the operator with the ability to manually intervene in the fire extinguishing process in an emergency. When the automatic fire extinguishing system cannot effectively control the fire, the operator can adjust the fire extinguishing operation through the manual control interface, including changing the injection flow rate, adjusting the injection direction or changing the selection of the fire extinguishing medium; the manual intervention unit is synchronized with the automatic control part of the system to ensure that the manual operation is effectively executed within the system, further improving the safety and controllability of fire extinguishing; through the alarm unit, feedback display unit and manual intervention unit in the human-computer interaction module, the system can promptly notify the operator when a fire occurs and provide real-time feedback information on the fire extinguishing process, so that the operator can control the progress of the fire extinguishing; if necessary, the operator can also adjust the fire extinguishing operation through the manual intervention unit to ensure the flexibility and accuracy of the fire extinguishing process and improve the overall effectiveness of fire extinguishing.

[0116] The power failure protection module includes a fire monitoring unit, a power failure control unit and a power supply cut-off unit; wherein:

[0117] Fire signal receiving unit: used to monitor the fire occurrence signal provided by the fire judgment unit in real time. Once the fire judgment unit confirms the occurrence of a fire, it will immediately trigger a power-off operation;

[0118] Power-off control unit: connected to the fire monitoring unit, used to automatically start the power-off process after receiving the fire confirmation signal, by controlling the power circuit breaker or relay device to switch it to the disconnected state, to ensure that the power supply of the machine tool is immediately interrupted when a fire occurs, thereby preventing the electrical system from causing a secondary fire due to a short circuit or overload caused by the fire;

[0119] Power cut-off unit: directly connected to the power off control unit, used to perform the physical disconnection operation of the power supply, completely cut off the main power supply and auxiliary power supply of the machine tool through an electrical switch or circuit breaker to ensure that the machine tool no longer has any power supply when a fire occurs. The operational reliability of the power cut-off unit is crucial to avoid the power supply automatically restoring after a fire, causing the risk of secondary disasters.

[0120] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0121] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A machine tool intelligent fire extinguishing system, characterized in that: It includes fire detection module, data processing module, fire type identification module, fire extinguishing control module, human-computer interaction module and power failure protection module; among which: Fire detection module: used to monitor the multi-dimensional data of temperature, smoke and flame in the working environment of the machine tool in real time through a variety of sensors, including temperature sensors, photoelectric sensors and gas sensors; Data processing module: connected to the fire detection module, used to receive and analyze the multi-dimensional data collected by the fire detection module, identify different types of fire characteristics, and generate preliminary fire judgment results; Fire type identification module: connected to the data processing module, based on the preset fire feature library, conducts in-depth analysis of the preliminary fire judgment results to identify the specific types of fires, including electrical fires, oil fires and solid fires; Fire extinguishing control module: connected to the fire type identification module, automatically selects the corresponding fire extinguishing medium according to the identified fire type, the fire extinguishing medium includes dry powder fire extinguishing agent, carbon dioxide fire extinguishing agent and water-based fire extinguishing agent, and realizes fixed-point fire extinguishing through injection control; Human-computer interaction module: connected to the fire extinguishing control module, used to send an alarm signal to the operator when a fire occurs, and provide real-time feedback information of the fire extinguishing process, so that the operator can manually intervene in the fire extinguishing process according to the feedback information; Power-off protection module: used to automatically cut off the power supply of the machine tool when a fire occurs to prevent the occurrence of a secondary fire.

2. The intelligent fire extinguishing system for machine tools according to claim 1, characterized in that: The fire detection module includes a temperature monitoring unit, a smoke monitoring unit and a flame monitoring unit; wherein: Temperature monitoring unit: used to install the temperature sensor near the heat source in the working environment of the machine tool, using infrared temperature measurement technology to monitor temperature changes in real time in a non-contact manner. The temperature sensor can also collect temperature data in the environment at preset time intervals and transmit the temperature data to the data processing module through wired or wireless communication; Smoke monitoring unit: used to distribute gas sensors in predetermined areas within the working environment of the machine tool, especially in places where air circulation is poor or smoke is easy to accumulate; the gas sensor continuously collects the concentration values ​​of smoke particles and harmful gases in the ambient air through electrochemical or semiconductor detection methods; the gas sensor specifically samples the gas concentration at a predetermined frequency and transmits the sampled data to the data processing module; Flame monitoring unit: used to install the photoelectric sensor above the working area of ​​the machine tool, and adopt spectral analysis technology to monitor the flame by sensing the changes in the light intensity and wavelength released by the flame. It can monitor the changes in the light signal in real time and transmit the light intensity data in the form of digital signals to the data processing module.

3. The intelligent fire extinguishing system for machine tools according to claim 1, characterized in that: The data processing module includes a data receiving unit, a data preprocessing unit, a data analysis unit and a fire judgment unit; wherein: Data receiving unit: used to receive multi-dimensional data transmitted by the fire detection module through wired or wireless means, including temperature changes, gas concentration and light intensity signals; Data preprocessing unit: used to preprocess the received multi-dimensional data, clean up invalid data through noise filtering and outlier removal operations, and standardize the data to unify the data dimension; Data analysis unit: after receiving the pre-processed data, it dynamically analyzes the changing trends of temperature, smoke density and flame signal according to the preset safety threshold and historical data, and when the data fluctuation exceeds the preset threshold and shows abnormality, it marks the data as fire characteristics and transmits it to the fire judgment unit; Fire judgment unit: Based on the abnormal data provided by the data analysis unit, the probability of fire occurrence is evaluated. When the abnormal data reaches the predetermined fire characteristic threshold, the fire occurrence is confirmed and a preliminary fire judgment result is generated.

4. The intelligent fire extinguishing system for machine tools according to claim 3, characterized in that: The data analysis unit specifically includes: Data initialization: After receiving the pre-processed multi-dimensional data, the initial state of temperature, smoke concentration and flame signal is recorded first, and a safety threshold is set for each signal to determine whether there is an abnormality later; Dynamic data monitoring: Receive the current data from the fire detection module in real time, including the current temperature, smoke concentration and light intensity, and monitor the changes in the current data, especially the change range of these data per unit time, to determine whether the data is changing rapidly; Trend analysis: Analyze the changing trend of data and evaluate whether the current data changes beyond the safe range in combination with the changing pattern of historical data. If the temperature shows a rapid rise, the smoke concentration increases significantly, or the flame signal increases sharply, it will be marked as abnormal. Abnormal data marking: When the change of one or more data exceeds the set safety threshold, the corresponding data will be marked as fire characteristic data; Transfer to the fire judgment unit: All fire characteristic data marked as abnormal are transferred to the fire judgment unit.

5. The intelligent fire extinguishing system for machine tools according to claim 4, characterized in that: The fire judgment unit specifically includes: Receiving abnormal data: The fire judgment unit first receives the abnormal data transmitted by the data analysis unit, including the mark values ​​of abnormal temperature, abnormal smoke density and abnormal flame signal; Determine the abnormal weight: Set different weights according to the importance of each abnormal data. Suppose the weights of temperature, smoke and flame signals are w and w respectively. T 、w C and w L , the sum of weights is 1; Calculate the abnormal probability of each feature: Calculate the probability of fire occurrence for each abnormal data exceeding the limit, assuming that the current value of each data is x T 、x C 、x L , the corresponding preset safety threshold is T max , C max and L max, , then the abnormal probability of each data is calculated according to the following formula: Among them, P T , P C and P L They represent the abnormal degree of temperature, smoke density and flame signal respectively, and the value varies between 0 and 1; Calculation of comprehensive fire probability: The abnormal probability of each feature is weighted and summed according to the weight to calculate the comprehensive probability of fire occurrence P fire ; The formula is: P fire =w T ·P T +w C ·P C +w L ·P L , where P fire Represents the comprehensive probability value of fire. The closer the value is to 1, the higher the possibility of fire. Fire probability threshold judgment: The calculated fire comprehensive probability is compared with the preset fire confirmation threshold P threshold For comparison, if P fire ≥P threshold , it is confirmed that a fire has occurred.

6. The intelligent fire extinguishing system for machine tools according to claim 1, characterized in that: The fire type identification module includes a feature matching unit, a type analysis unit and a type output unit; wherein: Feature matching unit: used to receive the preliminary fire judgment result generated by the fire judgment unit, and match the multi-dimensional fire feature data in the result with the preset fire feature library. During the matching, multiple parameters such as temperature abnormality, smoke concentration characteristics and flame light intensity are compared to find the type that is closest to the current fire feature; Type analysis unit: used to confirm the fire type based on the combination and intensity of each fire feature after the feature matching unit completes the preliminary matching. Specifically, when the temperature fluctuates significantly and the smoke concentration is high, it is judged as a solid fire; when the smoke is accompanied by oil and gas components, it is judged as an oil fire; when the flame signal and current fluctuations are abnormal, it is judged as an electrical fire. Type output unit: used to output the fire type result to the fire extinguishing control module of the system after the type analysis unit confirms the fire type, so as to trigger the fire extinguishing measures of the corresponding type of fire.

7. The intelligent fire extinguishing system for machine tools according to claim 1, characterized in that: The fire extinguishing control module includes a fire extinguishing medium selection unit, an injection control unit and a fixed-point fire extinguishing unit; wherein: Fire extinguishing medium selection unit: used to automatically select suitable fire extinguishing materials from the preset fire extinguishing media according to the fire type results provided by the fire type identification module. Specifically, when a solid fire is identified, a water-based fire extinguishing agent is selected for fire extinguishing; when an oil fire is identified, a carbon dioxide fire extinguishing agent is selected; when an electrical fire is identified, a dry powder fire extinguishing agent is selected; Spray control unit: used to adjust spray parameters, including spray velocity, angle and range, according to the location of the fire and the spread of the fire, to ensure that the fire extinguishing medium can accurately cover the fire source area; Fixed-point fire extinguishing unit: used to locate the specific location of the fire, and to spray the fire extinguishing medium to the fire source area through the fire extinguishing nozzles or nozzles set around the working area of ​​the machine tool to achieve fixed-point fire extinguishing.

8. The intelligent fire extinguishing system for machine tools according to claim 7, characterized in that: The fixed-point fire extinguishing unit specifically includes: Receive fire source location data: Receive real-time data from the fire detection module and data processing module, including temperature anomaly location, smoke concentration distribution and flame signal intensity; Calculate the center of the fire source: Determine the center of the fire source by weighting the abnormal data detected by each sensor; Determine the spray direction and angle: Calculate the spray direction and angle based on the center position coordinates of the fire source and the current position coordinates of the fire extinguishing nozzle; Adjusting the spray parameters: After determining the spray direction and angle, the fixed-point fire extinguishing unit adjusts the spray parameters, including the spray flow rate and pressure, according to the distance from the fire source to the nozzle and the intensity of the fire.

9. The intelligent fire extinguishing system for machine tools according to claim 1, characterized in that: The human-computer interaction module includes an alarm unit, a feedback display unit and a manual intervention unit; wherein: Alarm unit: used to send an alarm signal to the operator immediately after the fire judgment unit confirms the occurrence of a fire. The alarm signal is sent in a variety of ways, including sound and light alarms, vibration prompts, or alarms sent to remote terminals; Feedback display unit: During the fire extinguishing process, it is used to provide the operator with real-time information on the working status of the fire extinguishing system. Specifically, the screen displays various parameters during the fire extinguishing process, including the spray status of the fire extinguishing medium, the change in the location of the fire source, the temperature change trend, and the information on the fire extinguishing effect. The feedback display unit can also present the real-time data of each sensor, including the current temperature, smoke concentration, and flame intensity. Manual intervention unit: It is used to provide the operator with the ability to manually intervene in the fire extinguishing process in an emergency. When the automatic fire extinguishing system cannot effectively control the fire, the operator can adjust the fire extinguishing operation through the manual control interface, including changing the injection flow rate, adjusting the injection direction or changing the selection of the fire extinguishing medium.

10. The intelligent fire extinguishing system for machine tools according to claim 1, characterized in that: The power failure protection module includes a fire monitoring unit, a power failure control unit and a power supply cut-off unit; wherein: Fire signal receiving unit: used to monitor the fire occurrence signal provided by the fire judgment unit in real time. Once the fire judgment unit confirms the occurrence of a fire, it will immediately trigger a power-off operation; Power-off control unit: connected to the fire monitoring unit, used to automatically start the power-off process after receiving the fire confirmation signal, by controlling the power circuit breaker or relay device to switch it to the disconnected state, to ensure that the power supply of the machine tool is immediately interrupted when a fire occurs; Power cut-off unit: directly connected to the power-off control unit, used to perform the physical disconnection operation of the power supply, and completely cut off the main power supply and auxiliary power supply of the machine tool through an electrical switch or circuit breaker to ensure that the machine tool no longer has any power supply when a fire occurs.

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