Method and system for safety protection based on real-time vibration / acoustic emission monitoring

Abstract

The present invention provides a method and system for performing safety protection based on real-time vibration / acoustic emission monitoring, wherein the method comprises: obtaining structural configuration information and safety level information of a protected device; determining a plurality of candidate monitoring positions located at an external shell of the protected device according to a plurality of structural features; selecting a plurality of real-time monitoring positions from the plurality of candidate monitoring positions, and installing a vibration / acoustic emission monitoring sensor at each real-time monitoring position in close contact with the external shell; prompting the monitoring sensor to establish a communication connection with a monitoring device, and prompting the monitoring device to establish a control signal connection with a protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection; and the monitoring device sends a control instruction to the protection device through the control signal connection to cause the protection device to perform an action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment protection, and more specifically to a method and system for performing safety protection based on real-time vibration / acoustic emission monitoring. Background Art

[0002] At present, various types of equipment are running in various key locations or key scenarios. The safety protection of equipment has always been a very important technical field. For example, in the field of electrical equipment, short circuit protection, overcurrent protection and overload protection are commonly used protection technologies.

[0003] When the electrical equipment in the electrical control circuit is damaged, the load is short-circuited, or the wiring is wrong, a short circuit fault will occur. The instantaneous fault current generated by the short circuit is dozens of times the rated current. The strong electric force generated by the short-circuit current may damage the electrical equipment, generate arcs, and even cause fires. Short-circuit protection requires cutting off the power supply within a very short time after the short-circuit fault occurs. The common method is to connect a fuse or a low-voltage circuit breaker in series in the line.

[0004] When the motor or electrical component exceeds its rated current, the overcurrent is generally smaller than the short-circuit current and is within 6 times the rated current. The possibility of overcurrent in the electrical circuit is greater than short circuit, especially when the motor is frequently started and frequently reversed. In the case of overcurrent, if the current value can return to normal before reaching the maximum allowable temperature rise, the electrical component can still work normally, but the impact current caused by the overcurrent will damage the motor, and the instantaneous electromagnetic torque generated will damage the mechanical transmission components, so the power supply should be cut off in time.

[0005] The motor is in overload state when the running current exceeds the rated current but is less than 1.5 times the rated current. If the motor is overloaded for a long time, the temperature rise of its winding will exceed the allowable value and the insulation will age or be damaged. Overload protection requires instantaneous action without being affected by the short-term overload impact current or short-circuit current of the motor. Thermal relays are usually used as overload protection elements.

[0006] However, current equipment protection solutions usually monitor rapidly changing electrical quantities such as voltage and current, and provide protection at the critical time when the equipment is about to fail or be damaged. At this time, the equipment may have been partially damaged and if the protection solution is delayed for a period of time due to some circumstances, the equipment may have been completely damaged. Moreover, electrical quantities cannot fully reflect mechanical problems, which may lead to equipment damage caused by abnormal mechanical parts. Summary of the invention

[0007] In order to solve the problems in the prior art, the present application proposes a method and system for providing safety protection or real-time safety protection for various types of identification based on real-time vibration / acoustic emission monitoring.

[0008] According to one aspect of the present invention, a method for safety protection based on real-time vibration / acoustic emission monitoring is provided, the method comprising:

[0009] Select a protected device that needs to be protected from multiple devices, and obtain structural configuration information and security level information of the protected device;

[0010] Determine a plurality of structural features of the protected device according to the structural configuration information, and determine a plurality of candidate monitoring positions located at an external shell of the protected device according to the plurality of structural features;

[0011] Selecting a plurality of real-time monitoring positions from the plurality of candidate monitoring positions according to the safety level information, and installing a vibration / acoustic emission monitoring sensor at each real-time monitoring position in close contact with the external shell, so that each of the plurality of vibration / acoustic emission monitoring sensors monitors in real time the vibration / acoustic emission monitoring signal generated by the protected equipment during operation;

[0012] Prompting each vibration / acoustic emission monitoring sensor to establish a communication connection with the monitoring device, so that each vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through the communication connection;

[0013] Prompting the monitoring device to establish a control signal connection with the protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection; and

[0014] The monitoring device performs real-time calculations on the vibration / acoustic emission monitoring signals received from each vibration / acoustic emission monitoring sensor to obtain calculation results. When the calculation results meet predetermined conditions, the monitoring device sends control instructions to the protection device through a control signal connection to enable the protection device to take action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action.

[0015] The predetermined condition is a condition determined through analysis that may cause damage to the protected equipment;

[0016] The predetermined condition includes at least one of the following:

[0017] The amplitude of the vibration / acoustic emission monitoring signal is greater than the amplitude threshold value,

[0018] The energy value of the vibration / acoustic emission monitoring signal is greater than the energy value threshold,

[0019] The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude,

[0020] The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value,

[0021] The effective value of the vibration / acoustic emission monitoring signal is greater than the effective value threshold and

[0022] The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate.

[0023] The predetermined condition is a condition determined through analysis that may cause damage to the protected equipment;

[0024] The predetermined condition includes at least one of the following:

[0025] The amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude corresponding to the current operating parameters of the protected equipment.

[0026] The energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value corresponding to the current operating parameters of the protected equipment.

[0027] The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude corresponding to the current operating parameters of the protected equipment.

[0028] The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value corresponding to the current operating parameters of the protected equipment.

[0029] The effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value corresponding to the current operating parameters of the protected equipment and

[0030] The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate corresponding to the current operating parameters of the protected equipment.

[0031] The predetermined condition is that the vibration / acoustic emission monitoring signal shows a vibration mode or a combination of vibration modes that are not allowed to appear in the protected equipment under the current operating conditions.

[0032] The predetermined condition is that the change relationship of the vibration mode or the combination of vibration modes of the vibration / acoustic emission monitoring signal shows a change relationship that is not allowed under the current operating conditions of the protected equipment.

[0033] According to another aspect of the present invention, a system for safety protection based on real-time vibration / acoustic emission monitoring is provided, the system comprising:

[0034] An acquisition device, used to select a protected device that needs to be protected from multiple devices, and acquire structural configuration information and security level information of the protected device;

[0035] A determining device, configured to determine a plurality of structural features of the protected device according to the structural configuration information, and to determine a plurality of candidate monitoring positions located at an external housing of the protected device according to the plurality of structural features;

[0036] A selection device is used to select a plurality of real-time monitoring positions from the plurality of candidate monitoring positions according to the safety level information, and install a vibration / acoustic emission monitoring sensor at each real-time monitoring position in a manner close to the external shell, so that each of the plurality of vibration / acoustic emission monitoring sensors monitors in real time the vibration / acoustic emission monitoring signal generated by the protected equipment during operation;

[0037] a sending device, used to cause each vibration / acoustic emission monitoring sensor to establish a communication connection with the monitoring device, so that each vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through the communication connection; cause the monitoring device to establish a control signal connection with the protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection; and

[0038] The protection device is used to prompt the monitoring device to perform real-time calculations on the vibration / acoustic emission monitoring signals received from each vibration / acoustic emission monitoring sensor to obtain calculation results. When the calculation results meet predetermined conditions, the monitoring device sends control instructions to the protection device through the control signal connection to enable the protection device to take action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action.

[0039] The predetermined condition is a condition determined through analysis that may cause damage to the protected equipment;

[0040] The predetermined condition includes at least one of the following:

[0041] The amplitude of the vibration / acoustic emission monitoring signal is greater than the amplitude threshold value,

[0042] The energy value of the vibration / acoustic emission monitoring signal is greater than the energy value threshold,

[0043] The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude,

[0044] The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value,

[0045] The effective value of the vibration / acoustic emission monitoring signal is greater than the effective value threshold and

[0046] The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate.

[0047] The predetermined condition is a condition determined through analysis that may cause damage to the protected equipment;

[0048] The predetermined condition includes at least one of the following:

[0049] The amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude corresponding to the current operating parameters of the protected equipment.

[0050] The energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value corresponding to the current operating parameters of the protected equipment.

[0051] The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude corresponding to the current operating parameters of the protected equipment.

[0052] The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value corresponding to the current operating parameters of the protected equipment.

[0053] The effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value corresponding to the current operating parameters of the protected equipment and

[0054] The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate corresponding to the current operating parameters of the protected equipment.

[0055] The predetermined condition is that the vibration / acoustic emission monitoring signal shows a vibration mode or a combination of vibration modes that are not allowed to appear in the protected equipment under the current operating conditions.

[0056] The predetermined condition is that the change relationship of the vibration mode or the combination of vibration modes of the vibration / acoustic emission monitoring signal shows a change relationship that is not allowed under the current operating conditions of the protected equipment.

[0057] According to another aspect of the present invention, a voiceprint signal protection method includes:

[0058] Install a vibration / acoustic emission / sound / ultrasound probe on the housing of the protected equipment, and the probe is connected to the monitoring equipment;

[0059] The monitoring device is connected to the protection device so that the operation of the protected device can be stopped quickly;

[0060] The monitoring device uses a model to calculate and control the monitoring signal; when the given conditions are met, the protection device quickly stops the operation of the protected device.

[0061] The given conditions are: the amplitude, energy value, amplitude square, instantaneous value, effective value, and change speed of the monitoring signal exceeding the threshold value.

[0062] The given conditions are:

[0063] The amplitude, energy value, amplitude square, instantaneous value of energy square, effective value, and change rate of the monitoring signal exceed the threshold values ​​corresponding to the operating parameters of the protected equipment at that time.

[0064] The given conditions are:

[0065] The monitoring signal shows a vibration mode or a combination of vibration modes that are not permitted by the then operating conditions of the protected equipment; or, the changing relationship of the vibration mode or the combination of vibration modes of the monitoring signal shows a changing relationship that is not permitted by the then operating conditions of the protected equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0067] Figure 1 A flowchart of a method for performing safety protection based on real-time vibration / acoustic emission monitoring according to an embodiment of the present invention;

[0068] Figure 2 A flowchart of a method for performing safety protection based on real-time vibration / acoustic emission monitoring according to another embodiment of the present invention;

[0069] Figure 3 It is a schematic diagram of the structure of a system for performing safety protection based on real-time vibration / acoustic emission monitoring according to an embodiment of the present invention. DETAILED DESCRIPTION

[0070] Figure 1 1 is a flow chart of a method 100 for safety protection based on real-time vibration / acoustic emission monitoring according to an embodiment of the present invention. The method 100 starts at step 101 .

[0071] In step 101, a protected device that needs to be protected is selected from multiple devices, and the structural configuration information and safety level information of the protected device are obtained. In the power system, various types of equipment (for example, ordinary equipment, large equipment, important equipment) are used in various key positions, production links, monitoring links, etc. to achieve different functions. Generally, in order to ensure the safe operation of the system, it is necessary to monitor the status of various types of equipment in real time and accurately, and to perform timely and effective safety protection on the equipment based on the monitoring results. This is because when a specific device may fail, it will have a potential adverse effect on system safety. When a specific device fails, it may cause system-level failures and thus cause irreparable losses.

[0072] For example, when security protection is required for a certain device or a specific device among multiple devices, a protection request needs to be generated and sent to the device for security protection. The protection request may include the device name, device location, device identifier, etc. of the requested protected device. In response to the received protection request, the device for security protection extracts the name, location, identifier, etc. of the protected device from the protection request, and selects the protected device that needs security protection from the multiple devices based on the name, location and / or identifier of the protected device.

[0073] Generally, each device (including protected devices, backup devices, main devices, etc.) has attribute information, and the attribute information includes multiple attributes such as: structural configuration information, security level information, device type, device function, production date, last maintenance date, device name, device identifier, etc. For example, the structural configuration information, security level information, etc. of the protected device, backup device, main device, etc. can be determined through the attribute information of each device.

[0074] The structural configuration information is used to indicate or describe configuration information related to the internal or external structure of the device. The structural configuration information includes multiple structural features of the device. For example, multiple structural features of the protected device, the backup device, or the main device can be determined based on the structural configuration information of the protected device, the backup device, or the main device.

[0075] In the present application, each device (e.g., a protected device, a backup device, or a main device) includes multiple structural units. The structural unit may be a device subunit obtained by physically dividing the device into hardware. Alternatively, the structural unit may be a device subunit obtained by logically dividing the device into functions. Any two structural units among the multiple structural units may not have any common parts or intersections with each other, or any two structural units among the multiple structural units may have common parts or intersections.

[0076] Each of the multiple structural features may be feature information or attribute information for describing the structural unit. Typically, each structural unit has an associated structural feature, or a structural feature is configured or set for each structural unit. Each of the multiple structural features includes: the name of the structural unit, the location of the structural unit, the identifier of the structural unit, the importance level of the structural unit, the safety level of the structural unit, the device type of the structural unit, the production date of the structural unit, the maintenance times of the structural unit, the most recent maintenance date of the structural unit, the maintenance times of the structural unit, and the maintenance record of the structural unit.

[0077] In one embodiment, the security level information includes: a high security level and a low security level. Alternatively, the security level information includes: a high security level, a medium security level, or a low security level. When the same device (e.g., a protected device, a backup device, or a main device) is protected, different numbers of monitoring locations can be selected at the device, or different numbers of monitoring sensors can be set, according to different security levels. The higher the security level, the more signal types or locations need to be monitored; and the lower the security level, the fewer signal types or locations need to be monitored.

[0078] To this end, the real-time monitoring positions of the protected equipment with a high security level are more than the real-time monitoring positions of the protected equipment with a low security level; or the candidate monitoring positions of the protected equipment with a high security level are more than the candidate monitoring positions of the protected equipment with a low security level. In addition, the security level information also includes: a high-risk area of ​​the external shell of the protected equipment and a low-risk area of ​​the external shell of the protected equipment.

[0079] In step 102, multiple structural features of the protected device are determined according to the structural configuration information, and multiple candidate monitoring positions located at the external shell of the protected device are determined according to the multiple structural features. The structural configuration information is parsed or read to determine the multiple structural features of the protected device.

[0080] Determining multiple candidate monitoring positions located at the external shell of the protected device based on multiple structural features includes: selecting multiple structural units to be monitored from multiple structural units based on the name and device type of the structural unit. The structural unit to be monitored may be a structural unit that has a significant impact on the normal operation of the protected device. Or the operating state of the structural unit to be monitored can characterize or indicate the operating state of the protected device. To this end, multiple structural units to be monitored can be selected from multiple structural units based on the name and device type of the structural unit. In addition, the number of structural units to be monitored selected from the multiple structural units can be adjusted according to different security levels.

[0081] Subsequently, candidate monitoring positions are determined according to the position of each structural unit to be monitored, thereby obtaining multiple candidate monitoring positions located at the external shell of the protected device. The candidate monitoring position may be the position closest to the structural unit to be monitored, the position closest to the key component of the structural unit to be monitored, etc. In certain specific cases, the candidate monitoring position may be located inside the protected device.

[0082] Determining the candidate monitoring position according to the position of each structural unit to be monitored includes: determining the projection area of ​​each structural unit to be monitored on the external shell of the protected device according to the position and size of each structural unit to be monitored; and determining the candidate monitoring position in the projection area.

[0083] In step 103, a plurality of real-time monitoring positions are selected from the plurality of candidate monitoring positions according to the safety level information, and a vibration / acoustic emission monitoring sensor is installed at each real-time monitoring position in close contact with the external shell, so that each of the plurality of vibration / acoustic emission monitoring sensors can monitor in real time the vibration / acoustic emission monitoring signal generated by the protected equipment during operation.

[0084] As described above, the security level information includes: a high security level and a low security level. Alternatively, the security level information includes: a high security level, a medium security level or a low security level. When the same device (for example, a protected device, a backup device or a main device) is protected, different numbers of monitoring locations can be selected at the device, or different numbers of monitoring sensors can be set according to different security levels. The higher the security level, the more signal types or locations need to be monitored; and the lower the security level, the fewer signal types or locations need to be monitored.

[0085] The real-time monitoring positions of the protected device with a high security level are more than the real-time monitoring positions of the protected device with a low security level; or the candidate monitoring positions of the protected device with a high security level are more than the candidate monitoring positions of the protected device with a low security level. In addition, the security level information may also include: a high-risk area of ​​the external shell of the protected device and a low-risk area of ​​the external shell of the protected device, and the multiple candidate monitoring positions located at the external shell of the protected device determined according to the multiple structural features cannot be located in the high-risk area.

[0086] Selecting multiple real-time monitoring positions from the multiple candidate monitoring positions according to the security level information includes: when the security level information is a high security level, selecting a first number of candidate monitoring positions from the multiple candidate monitoring positions as real-time monitoring positions; when the security level information is a medium security level, selecting a second number of candidate monitoring positions from the multiple candidate monitoring positions as real-time monitoring positions; when the security level information is a low security level, selecting a third number of candidate monitoring positions from the multiple candidate monitoring positions as real-time monitoring positions. The first number is greater than the second number, and the second number is greater than the third number.

[0087] In the technical means of installing the vibration / acoustic emission monitoring sensor in close contact with the external shell at each real-time monitoring position, the vibration / acoustic emission monitoring sensor can be closely attached to the external shell of the protected device at each real-time monitoring position by means of magnetic attraction, adhesion, etc.

[0088] In step 104, each vibration / acoustic emission monitoring sensor is prompted to establish a communication connection with the monitoring device, so that each vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through the communication connection. Wherein each vibration / acoustic emission monitoring sensor establishes a communication connection with the monitoring device, including: each vibration / acoustic emission monitoring sensor establishes a wired communication connection with the monitoring device, or each vibration / acoustic emission monitoring sensor establishes a wireless communication connection with the monitoring device. The wireless communication connection can be a wireless communication connection established according to any suitable wireless communication protocol. In addition, each vibration / acoustic emission monitoring sensor can obtain power by wired means, or each vibration / acoustic emission monitoring sensor can obtain power by photovoltaic means.

[0089] When the protected equipment is in operation, each structural unit may generate different vibration / acoustic emission monitoring signals. To this end, the vibration / acoustic emission monitoring sensor installed in close contact with the external shell at each real-time monitoring position can obtain the vibration / acoustic emission monitoring signal of the structural unit associated with the respective real-time monitoring position in real time. Subsequently, the vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through a wired or wireless communication connection.

[0090] In step 105, the monitoring device is prompted to establish a control signal connection with the protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection. Preferably, an independent / undisturbed control signal connection can be established between the monitoring device and the protection device of the protected device. Such a control signal connection can use a wireless connection method or a wired connection method. Preferably, the protected device can have multiple protection devices. To this end, the monitoring device establishes a control signal connection with each protection device of the protected device. When the monitoring device determines that one or more protection devices among the multiple protector devices need to be controlled to perform a control action based on the received vibration / acoustic emission monitoring signal, a control instruction is sent to the corresponding protection device through the control signal connection. The control instruction is, for example, an instruction to cut off the protected device, an instruction to stop the operation of the protected device, an instruction to stop the power supply to the protected device, an instruction to start the operation of the backup device, etc.

[0091] In step 106, the monitoring device performs real-time calculations on the vibration / acoustic emission monitoring signals received from each vibration / acoustic emission monitoring sensor to obtain calculation results. When the calculation results meet predetermined conditions, the monitoring device sends a control instruction to the protection device through a control signal connection to cause the protection device to take action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action.

[0092] The predetermined condition is a condition determined by analysis that may cause damage to the protected equipment. The predetermined condition includes at least one of the following: the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude, the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value, the square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude square, the instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value, the effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value, and the change speed of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change speed.

[0093] The monitoring device performs real-time calculation on the vibration / acoustic emission monitoring signal received from each vibration / acoustic emission monitoring sensor to obtain the calculation result, including: the monitoring device performs real-time calculation on the vibration / acoustic emission monitoring signal received from each vibration / acoustic emission monitoring sensor to obtain the following calculation results: the amplitude, energy value, amplitude square, instantaneous value of the square of the energy value, effective value or change rate of the monitoring signal. Real-time calculation, for example, includes real-time calculation of the amplitude, energy value, amplitude square, instantaneous value of the square of the energy value, effective value or change rate of the vibration / acoustic emission monitoring signal. In addition, before the vibration / acoustic emission monitoring signal is calculated in real time, noise reduction processing, noise removal processing, filtering processing, etc. can also be performed on the vibration / acoustic emission monitoring signal.

[0094] The predetermined condition is a condition determined by analysis that may cause damage to the protected device. The predetermined condition includes at least one of the following: the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude corresponding to the current operating parameters of the protected device, the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value corresponding to the current operating parameters of the protected device, the square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude square corresponding to the current operating parameters of the protected device, the instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value corresponding to the current operating parameters of the protected device, the effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value corresponding to the current operating parameters of the protected device, and the change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate corresponding to the current operating parameters of the protected device.

[0095] The predetermined condition is: the vibration / acoustic emission monitoring signal shows a vibration mode or a combination of vibration modes that are not allowed to appear under the current operating conditions of the protected equipment. The predetermined condition is: the change relationship of the vibration mode or the combination of vibration modes of the vibration / acoustic emission monitoring signal shows a change relationship that is not allowed under the current operating conditions of the protected equipment.

[0096] The predetermined condition is that the characteristic parameter of vibration / acoustic emission calculated in real time is greater than the characteristic parameter setting value or the change speed of the characteristic parameter is greater than the change speed setting value. The characteristic parameters include one or more of the following: signal-to-noise ratio, ratio of even and odd harmonic amplitudes, frequency complexity, main frequency proportion, fundamental frequency proportion, current correlation, spectrum center of gravity, signal amplitude level, and 50Hz frequency amplitude.

[0097] Wherein, when the calculation result meets the predetermined condition, the monitoring device sends a control instruction to the protection device through the control signal connection to make the protection device take action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action, including: pre-setting a direct cut-off condition (or a direct stop operation condition), a backup cut-off condition (or a backup stop operation condition) and a warning condition, wherein the safety protection requirement of the direct cut-off condition is higher than that of the backup cut-off condition, and the safety protection requirement of the backup cut-off condition is higher than that of the warning condition.

[0098] When the calculation result meets the direct cut-off condition, the monitoring device issues a control instruction for instructing the cut-off of the protected device or for instructing the protected device to stop operating;

[0099] When the calculation result meets the condition of standby removal, if it is detected that the standby equipment has been put into operation or is running, the monitoring device issues a control instruction for instructing the removal of the protected equipment or for instructing the protected equipment to stop running; if it is detected that the standby equipment is in a ready state for commissioning or running, the monitoring device issues a commissioning or running instruction to the standby equipment to prompt the standby equipment to start commissioning or running; after detecting that the standby equipment has completed commissioning or started running, a control instruction for instructing the removal of the protected equipment or for instructing the protected equipment to stop running is issued; if it is detected that the standby equipment is unavailable, cannot be put into operation or cannot run, the monitoring device issues a control instruction for warning to the display device or warning device, and the display device or warning device is used to display the warning, play the warning voice or alarm according to the warning control instruction;

[0100] The standby device and the protected device have the same device type, device function, etc., and the standby device is used to replace the protected device or complete the work of the protected device when the protected device is cut off or stops running.

[0101] When the calculation result meets the warning condition, the monitoring device sends a control instruction for warning to the display device or warning device, and the display device or warning device is used to display the warning, play the warning voice or alarm according to the warning control instruction (corresponding to the existence of backup equipment, the backup equipment is switched on). It also includes when the problem is not serious and only needs to be warned.

[0102] It also includes setting a monitoring channel for monitoring the load conditions of the protected equipment and / or the backup equipment, and calculating in real time whether the backup equipment can bear the load (the whole load) transferred from the protected equipment according to the load conditions of the protection equipment and / or the backup equipment, and judging whether the cut-off condition of the protected equipment is met according to whether the backup equipment can bear the load (the whole load) transferred from the protected equipment. For example, when the backup equipment can bear the load (the whole load) transferred from the protected equipment, it is determined that the protected equipment meets the cut-off condition; when the backup equipment cannot bear the load (the whole load) transferred from the protected equipment, it is determined that the protected equipment does not meet the cut-off condition.

[0103] Figure 2 2 is a flow chart of a method 200 for safety protection based on real-time vibration / acoustic emission monitoring according to another embodiment of the present invention. The method 200 starts from step 201 .

[0104] In step 201, a vibration / acoustic emission / sound / ultrasound probe is installed on the housing of the protected device, and the probe is connected to a monitoring device.

[0105] In step 202, the monitoring device is connected to the protection device so that the operation of the protected device can be stopped quickly.

[0106] In step 203, the monitoring device uses a model to calculate and control the monitoring signal; when a given condition is met, the operation of the protected device is quickly stopped by the protection device.

[0107] The given conditions are: the amplitude, energy value, amplitude square, instantaneous value of energy square, effective value, and change rate of the monitoring signal exceed the threshold value. The given conditions are: the amplitude, energy value, amplitude square, instantaneous value of energy square, effective value, and change rate of the monitoring signal exceed the threshold value corresponding to the operating parameters of the protected device at that time. The given conditions are: the monitoring signal shows a vibration mode or a combination of vibration modes that is not allowed by the operating conditions of the protected device at that time; or, the change relationship of the vibration mode or the combination of vibration modes of the monitoring signal shows a change relationship that is not allowed by the operating conditions of the protected device at that time.

[0108] Figure 3 Schematic diagram of a system 300 for performing safety protection based on real-time vibration / acoustic emission monitoring according to an embodiment of the present invention. The system 300 comprises: an acquisition device 301 , a determination device 302 , a selection device 303 , a sending device 304 and a protection device 305 .

[0109] The acquisition device 301 is used to select a protected device that needs to be protected from multiple devices, and obtain the structural configuration information and safety level information of the protected device. In the power system, various types of equipment (for example, ordinary equipment, large equipment, important equipment) are used in various key positions, production links, monitoring links, etc. to achieve different functions. Usually, in order to ensure the safe operation of the system, it is necessary to monitor the status of various types of equipment in real time and accurately, and to perform timely and effective safety protection on the equipment based on the monitoring results. This is because when a specific device may fail, it will have a potential adverse effect on system safety. When a specific device fails, it may cause a system-level failure and cause irreparable losses.

[0110] For example, when security protection is required for a certain device or a specific device among multiple devices, a protection request needs to be generated and sent to the device for security protection. The protection request may include the device name, device location, device identifier, etc. of the requested protected device. In response to the received protection request, the device for security protection extracts the name, location, identifier, etc. of the protected device from the protection request, and selects the protected device that needs security protection from the multiple devices based on the name, location and / or identifier of the protected device.

[0111] Generally, each device (including protected devices, backup devices, main devices, etc.) has attribute information, and the attribute information includes multiple attributes such as: structural configuration information, security level information, device type, device function, production date, last maintenance date, device name, device identifier, etc. For example, the structural configuration information, security level information, etc. of the protected device, backup device, main device, etc. can be determined through the attribute information of each device.

[0112] The structural configuration information is used to indicate or describe configuration information related to the internal or external structure of the device. The structural configuration information includes multiple structural features of the device. For example, multiple structural features of the protected device, the backup device, or the main device can be determined based on the structural configuration information of the protected device, the backup device, or the main device.

[0113] In the present application, each device (e.g., a protected device, a backup device, or a main device) includes multiple structural units. The structural unit may be a device subunit obtained by physically dividing the device into hardware. Alternatively, the structural unit may be a device subunit obtained by logically dividing the device into functions. Any two structural units among the multiple structural units may not have any common parts or intersections with each other, or any two structural units among the multiple structural units may have common parts or intersections.

[0114] Each of the multiple structural features may be feature information or attribute information for describing the structural unit. Typically, each structural unit has an associated structural feature, or a structural feature is configured or set for each structural unit. Each of the multiple structural features includes: the name of the structural unit, the location of the structural unit, the identifier of the structural unit, the importance level of the structural unit, the safety level of the structural unit, the device type of the structural unit, the production date of the structural unit, the maintenance times of the structural unit, the most recent maintenance date of the structural unit, the maintenance times of the structural unit, and the maintenance record of the structural unit.

[0115] In one embodiment, the security level information includes: a high security level and a low security level. Alternatively, the security level information includes: a high security level, a medium security level, or a low security level. When the same device (e.g., a protected device, a backup device, or a main device) is protected, different numbers of monitoring locations can be selected at the device, or different numbers of monitoring sensors can be set, according to different security levels. The higher the security level, the more signal types or locations need to be monitored; and the lower the security level, the fewer signal types or locations need to be monitored.

[0116] To this end, the real-time monitoring positions of the protected equipment with a high security level are more than the real-time monitoring positions of the protected equipment with a low security level; or the candidate monitoring positions of the protected equipment with a high security level are more than the candidate monitoring positions of the protected equipment with a low security level. In addition, the security level information also includes: a high-risk area of ​​the external shell of the protected equipment and a low-risk area of ​​the external shell of the protected equipment.

[0117] The determining means 302 is used to determine multiple structural features of the protected device according to the structural configuration information, and determine multiple candidate monitoring positions located at the external shell of the protected device according to the multiple structural features. The structural configuration information is parsed or read to determine the multiple structural features of the protected device.

[0118] Determining multiple candidate monitoring positions located at the external shell of the protected device based on multiple structural features includes: selecting multiple structural units to be monitored from multiple structural units based on the name and device type of the structural unit. The structural unit to be monitored may be a structural unit that has a significant impact on the normal operation of the protected device. Or the operating state of the structural unit to be monitored can characterize or indicate the operating state of the protected device. To this end, multiple structural units to be monitored can be selected from multiple structural units based on the name and device type of the structural unit. In addition, the number of structural units to be monitored selected from the multiple structural units can be adjusted according to different security levels.

[0119] Subsequently, candidate monitoring positions are determined according to the position of each structural unit to be monitored, thereby obtaining multiple candidate monitoring positions located at the external shell of the protected device. The candidate monitoring position may be the position closest to the structural unit to be monitored, the position closest to the key component of the structural unit to be monitored, etc. In certain specific cases, the candidate monitoring position may be located inside the protected device.

[0120] Determining the candidate monitoring position according to the position of each structural unit to be monitored includes: determining the projection area of ​​each structural unit to be monitored on the external shell of the protected device according to the position and size of each structural unit to be monitored; and determining the candidate monitoring position in the projection area.

[0121] The selection device 303 is used to select multiple real-time monitoring positions from the multiple candidate monitoring positions according to the safety level information, and install a vibration / acoustic emission monitoring sensor at each real-time monitoring position in a manner close to the external shell, so that each of the multiple vibration / acoustic emission monitoring sensors can monitor in real time the vibration / acoustic emission monitoring signal generated by the protected equipment during operation.

[0122] As described above, the security level information includes: a high security level and a low security level. Alternatively, the security level information includes: a high security level, a medium security level or a low security level. When the same device (for example, a protected device, a backup device or a main device) is protected, different numbers of monitoring locations can be selected at the device, or different numbers of monitoring sensors can be set according to different security levels. The higher the security level, the more signal types or locations need to be monitored; and the lower the security level, the fewer signal types or locations need to be monitored.

[0123] The real-time monitoring positions of the protected device with a high security level are more than the real-time monitoring positions of the protected device with a low security level; or the candidate monitoring positions of the protected device with a high security level are more than the candidate monitoring positions of the protected device with a low security level. In addition, the security level information may also include: a high-risk area of ​​the external shell of the protected device and a low-risk area of ​​the external shell of the protected device, and the multiple candidate monitoring positions located at the external shell of the protected device determined according to the multiple structural features cannot be located in the high-risk area.

[0124] Selecting multiple real-time monitoring positions from the multiple candidate monitoring positions according to the security level information includes: when the security level information is a high security level, selecting a first number of candidate monitoring positions from the multiple candidate monitoring positions as real-time monitoring positions; when the security level information is a medium security level, selecting a second number of candidate monitoring positions from the multiple candidate monitoring positions as real-time monitoring positions; when the security level information is a low security level, selecting a third number of candidate monitoring positions from the multiple candidate monitoring positions as real-time monitoring positions. The first number is greater than the second number, and the second number is greater than the third number.

[0125] In the technical means of installing the vibration / acoustic emission monitoring sensor in close contact with the external shell at each real-time monitoring position, the vibration / acoustic emission monitoring sensor can be closely attached to the external shell of the protected device at each real-time monitoring position by means of magnetic attraction, adhesion, etc.

[0126] The sending device 304 is used to prompt each vibration / acoustic emission monitoring sensor to establish a communication connection with the monitoring device, so that each vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through the communication connection; and to prompt the monitoring device to establish a control signal connection with the protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection.

[0127] Wherein each vibration / acoustic emission monitoring sensor establishes a communication connection with the monitoring device, including: each vibration / acoustic emission monitoring sensor establishes a wired communication connection with the monitoring device, or each vibration / acoustic emission monitoring sensor establishes a wireless communication connection with the monitoring device. The wireless communication connection may be a wireless communication connection established according to any suitable wireless communication protocol. In addition, each vibration / acoustic emission monitoring sensor may obtain power through a wired manner, or each vibration / acoustic emission monitoring sensor may obtain power through a photovoltaic manner.

[0128] When the protected equipment is in operation, each structural unit may generate different vibration / acoustic emission monitoring signals. To this end, the vibration / acoustic emission monitoring sensor installed in close contact with the external shell at each real-time monitoring position can obtain the vibration / acoustic emission monitoring signal of the structural unit associated with the respective real-time monitoring position in real time. Subsequently, the vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through a wired or wireless communication connection.

[0129] Preferably, an independent / undisturbed control signal connection can be established between the monitoring device and the protection device of the protected device. This control signal connection can use a wireless connection method or a wired connection method. Preferably, the protected device can have multiple protection devices. To this end, the monitoring device establishes a control signal connection with each protection device of the protected device. When the monitoring device determines that one or more protection devices among the multiple protector devices need to be controlled to perform a control action based on the received vibration / acoustic emission monitoring signal, a control instruction is sent to the corresponding protection device through the control signal connection. The control instruction is, for example, an instruction to cut off the protected device, an instruction to stop the operation of the protected device, an instruction to stop the power supply to the protected device, an instruction to start the operation of the backup device, etc.

[0130] The protection device 305 is used to prompt the monitoring device to perform real-time calculations on the vibration / acoustic emission monitoring signals received from each vibration / acoustic emission monitoring sensor to obtain calculation results. When the calculation results meet predetermined conditions, the monitoring device sends a control instruction to the protection device through a control signal connection to enable the protection device to take action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action.

[0131] The predetermined condition is a condition determined by analysis that may cause damage to the protected equipment. The predetermined condition includes at least one of the following: the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude, the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value, the square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude square, the instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value, the effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value, and the change speed of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change speed.

[0132] The monitoring device performs real-time calculation on the vibration / acoustic emission monitoring signal received from each vibration / acoustic emission monitoring sensor to obtain the calculation result, including: the monitoring device performs real-time calculation on the vibration / acoustic emission monitoring signal received from each vibration / acoustic emission monitoring sensor to obtain the following calculation results: the amplitude, energy value, amplitude square, instantaneous value of the square of the energy value, effective value or change rate of the monitoring signal. Real-time calculation, for example, includes real-time calculation of the amplitude, energy value, amplitude square, instantaneous value of the square of the energy value, effective value or change rate of the vibration / acoustic emission monitoring signal. In addition, before the vibration / acoustic emission monitoring signal is calculated in real time, noise reduction processing, noise removal processing, filtering processing, etc. can also be performed on the vibration / acoustic emission monitoring signal.

[0133] The predetermined condition is a condition determined by analysis that may cause damage to the protected device. The predetermined condition includes at least one of the following: the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude corresponding to the current operating parameters of the protected device, the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value corresponding to the current operating parameters of the protected device, the square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude square corresponding to the current operating parameters of the protected device, the instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value corresponding to the current operating parameters of the protected device, the effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value corresponding to the current operating parameters of the protected device, and the change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate corresponding to the current operating parameters of the protected device.

[0134] The predetermined condition is: the vibration / acoustic emission monitoring signal shows a vibration mode or a combination of vibration modes that are not allowed to appear under the current operating conditions of the protected equipment. The predetermined condition is: the change relationship of the vibration mode or the combination of vibration modes of the vibration / acoustic emission monitoring signal shows a change relationship that is not allowed under the current operating conditions of the protected equipment.

[0135] The predetermined condition is that the characteristic parameter of vibration / acoustic emission calculated in real time is greater than the characteristic parameter setting value or the change speed of the characteristic parameter is greater than the change speed setting value. The characteristic parameters include one or more of the following: signal-to-noise ratio, ratio of even and odd harmonic amplitudes, frequency complexity, main frequency proportion, fundamental frequency proportion, current correlation, spectrum center of gravity, signal amplitude level, and 50Hz frequency amplitude.

[0136] Wherein, when the calculation result meets the predetermined condition, the monitoring device sends a control instruction to the protection device through the control signal connection to make the protection device take action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action, including: pre-setting a direct cut-off condition (or a direct stop operation condition), a backup cut-off condition (or a backup stop operation condition) and a warning condition, wherein the safety protection requirement of the direct cut-off condition is higher than that of the backup cut-off condition, and the safety protection requirement of the backup cut-off condition is higher than that of the warning condition.

[0137] When the calculation result meets the direct cut-off condition, the monitoring device issues a control instruction for instructing the cut-off of the protected device or for instructing the protected device to stop operating;

[0138] When the calculation result meets the condition of standby removal, if it is detected that the standby equipment has been put into operation or is running, the monitoring device issues a control instruction for instructing the removal of the protected equipment or for instructing the protected equipment to stop running; if it is detected that the standby equipment is in a ready state for commissioning or running, the monitoring device issues a commissioning or running instruction to the standby equipment to prompt the standby equipment to start commissioning or running; after detecting that the standby equipment has completed commissioning or started running, a control instruction for instructing the removal of the protected equipment or for instructing the protected equipment to stop running is issued; if it is detected that the standby equipment is unavailable, cannot be put into operation or cannot run, the monitoring device issues a control instruction for warning to the display device or warning device, and the display device or warning device is used to display the warning, play the warning voice or alarm according to the warning control instruction;

[0139] The standby device and the protected device have the same device type, device function, etc., and the standby device is used to replace the protected device or complete the work of the protected device when the protected device is cut off or stops running.

[0140] When the calculation result meets the warning condition, the monitoring device sends a control instruction for warning to the display device or warning device, and the display device or warning device is used to display the warning, play the warning voice or alarm according to the warning control instruction (corresponding to the existence of backup equipment, the backup equipment is switched on). It also includes when the problem is not serious and only needs to be warned.

[0141] It also includes setting a monitoring channel for monitoring the load conditions of the protected equipment and / or the backup equipment, and calculating in real time whether the backup equipment can bear the load (the whole load) transferred from the protected equipment according to the load conditions of the protection equipment and / or the backup equipment, and judging whether the cut-off condition of the protected equipment is met according to whether the backup equipment can bear the load (the whole load) transferred from the protected equipment. For example, when the backup equipment can bear the load (the whole load) transferred from the protected equipment, it is determined that the protected equipment meets the cut-off condition; when the backup equipment cannot bear the load (the whole load) transferred from the protected equipment, it is determined that the protected equipment does not meet the cut-off condition.

Claims

1. A method for safety protection based on real-time vibration / acoustic emission monitoring, the method comprising: Select a protected device that needs to be protected from multiple devices, and obtain structural configuration information and security level information of the protected device; Determine a plurality of structural features of the protected device according to the structural configuration information, and determine a plurality of candidate monitoring positions located at an external shell of the protected device according to the plurality of structural features; Selecting a plurality of real-time monitoring positions from the plurality of candidate monitoring positions according to the safety level information, and installing a vibration / acoustic emission monitoring sensor at each real-time monitoring position in close contact with the external shell, so that each of the plurality of vibration / acoustic emission monitoring sensors monitors in real time the vibration / acoustic emission monitoring signal generated by the protected equipment during operation; Prompting each vibration / acoustic emission monitoring sensor to establish a communication connection with the monitoring device, so that each vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through the communication connection; Prompting the monitoring device to establish a control signal connection with the protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection; as well as The monitoring device performs real-time calculation on the vibration / acoustic emission monitoring signal received from each vibration / acoustic emission monitoring sensor to obtain a calculation result. When the calculation result meets a predetermined condition, the monitoring device sends a control instruction to the protection device through a control signal connection to enable the protection device to perform an action, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action; The protected equipment includes a plurality of structural units; Each of the plurality of structural features comprises: a name of a structural unit, a position of the structural unit and a device type of the structural unit; Wherein, determining multiple candidate monitoring positions located at the external shell of the protected device according to multiple structural features includes: Selecting a plurality of structural units to be monitored from a plurality of structural units according to the names and device types of the structural units; Determine candidate monitoring positions according to the position of each structural unit to be monitored, thereby obtaining a plurality of candidate monitoring positions located at the external shell of the protected device; Wherein, determining the candidate monitoring position according to the position of each structural unit to be monitored includes: Determine the projection area of ​​each structural unit to be monitored on the external shell of the protected device according to the position and size of each structural unit to be monitored; A candidate monitoring position is determined in the projection area.

2. The method according to claim 1, wherein the predetermined condition is a condition determined by analysis that may cause damage to the protected equipment; The predetermined condition includes at least one of the following: The amplitude of the vibration / acoustic emission monitoring signal is greater than the amplitude threshold value, The energy value of the vibration / acoustic emission monitoring signal is greater than the energy value threshold, The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude, The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value, The effective value of the vibration / acoustic emission monitoring signal is greater than the effective value threshold and The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate.

3. The method according to claim 1, wherein the predetermined condition is a condition determined by analysis that may cause damage to the protected equipment; The predetermined condition includes at least one of the following: The amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude corresponding to the current operating parameters of the protected equipment. The energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value corresponding to the current operating parameters of the protected equipment. The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude corresponding to the current operating parameters of the protected equipment. The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value corresponding to the current operating parameters of the protected equipment. The effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value corresponding to the current operating parameters of the protected equipment and The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate corresponding to the current operating parameters of the protected equipment.

4. The method according to claim 1, wherein the predetermined condition is that the vibration / acoustic emission monitoring signal shows a vibration mode or a combination of vibration modes that are not allowed to appear in the protected equipment under current operating conditions.

5. The method according to claim 1, wherein the predetermined condition is that the change relationship of the vibration mode or the combination of vibration modes of the vibration / acoustic emission monitoring signal shows a change relationship that is not allowed under the current operating conditions of the protected equipment.

6. A system for safety protection based on real-time vibration / acoustic emission monitoring, the system comprising: An acquisition device, used to select a protected device that needs to be protected from multiple devices, and acquire structural configuration information and security level information of the protected device; A determining device, configured to determine a plurality of structural features of the protected device according to the structural configuration information, and to determine a plurality of candidate monitoring positions located at an external housing of the protected device according to the plurality of structural features; A selection device is used to select a plurality of real-time monitoring positions from the plurality of candidate monitoring positions according to the safety level information, and install a vibration / acoustic emission monitoring sensor at each real-time monitoring position in a manner close to the external shell, so that each of the plurality of vibration / acoustic emission monitoring sensors monitors in real time the vibration / acoustic emission monitoring signal generated by the protected equipment during operation; A sending device, used to prompt each vibration / acoustic emission monitoring sensor to establish a communication connection with the monitoring device, so that each vibration / acoustic emission monitoring sensor can send the obtained vibration / acoustic emission monitoring signal to the monitoring device through the communication connection; Prompting the monitoring device to establish a control signal connection with the protection device of the protected device, so that the monitoring device can send a control instruction to the protection device through the control signal connection; as well as A protection device, used to prompt the monitoring device to perform real-time calculations on the vibration / acoustic emission monitoring signals received from each vibration / acoustic emission monitoring sensor to obtain a calculation result. When the calculation result meets a predetermined condition, the monitoring device sends a control instruction to the protection device through a control signal connection to cause the protection device to act, thereby prompting the protection device to perform real-time safety protection on the protected device based on the action; The protected equipment includes a plurality of structural units; Each of the plurality of structural features comprises: a name of a structural unit, a position of the structural unit and a device type of the structural unit; The determining device determines a plurality of candidate monitoring positions located at the external shell of the protected device according to a plurality of structural features, including: The determining device selects a plurality of structural units to be monitored from a plurality of structural units according to the names and device types of the structural units; The determining device determines a candidate monitoring position according to the position of each structural unit to be monitored, thereby obtaining a plurality of candidate monitoring positions located at the external shell of the protected device; The determining device determines the candidate monitoring position according to the position of each structural unit to be monitored, including: The determining device determines the projection area of ​​each structural unit to be monitored on the external shell of the protected device according to the position and size of each structural unit to be monitored; The determining device determines a candidate monitoring position in the projection area.

7. The system according to claim 6, wherein the predetermined condition is a condition determined by analysis that may cause damage to the protected equipment; The predetermined condition includes at least one of the following: The amplitude of the vibration / acoustic emission monitoring signal is greater than the amplitude threshold value, The energy value of the vibration / acoustic emission monitoring signal is greater than the energy value threshold, The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude, The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value, The effective value of the vibration / acoustic emission monitoring signal is greater than the effective value threshold and The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate.

8. The system according to claim 6, wherein the predetermined condition is a condition determined by analysis that may cause damage to the protected equipment; The predetermined condition includes at least one of the following: The amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the amplitude corresponding to the current operating parameters of the protected equipment. The energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the energy value corresponding to the current operating parameters of the protected equipment. The square of the amplitude of the vibration / acoustic emission monitoring signal is greater than the threshold value of the square of the amplitude corresponding to the current operating parameters of the protected equipment. The instantaneous value of the square of the energy value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the instantaneous value of the square of the energy value corresponding to the current operating parameters of the protected equipment. The effective value of the vibration / acoustic emission monitoring signal is greater than the threshold value of the effective value corresponding to the current operating parameters of the protected equipment and The change rate of the vibration / acoustic emission monitoring signal is greater than the threshold value of the change rate corresponding to the current operating parameters of the protected equipment.

9. The system according to claim 6, wherein the predetermined condition is that the vibration / acoustic emission monitoring signal shows a vibration mode or a combination of vibration modes that are not allowed to appear in the protected equipment under current operating conditions.

10. The system according to claim 6, wherein the predetermined condition is that a change relationship of a vibration mode or a combination of vibration modes of a vibration / acoustic emission monitoring signal shows a change relationship that is not allowed under the current operating conditions of the protected equipment.

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