CN111653064B - Safety early warning system and method for high-altitude installation object - Google Patents
Safety early warning system and method for high-altitude installation object Download PDFInfo
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- CN111653064B CN111653064B CN202010543944.9A CN202010543944A CN111653064B CN 111653064 B CN111653064 B CN 111653064B CN 202010543944 A CN202010543944 A CN 202010543944A CN 111653064 B CN111653064 B CN 111653064B
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P2015/0862—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values being provided with particular means being integrated into a MEMS accelerometer structure for providing particular additional functionalities to those of a spring mass system
Abstract
The invention discloses a safety early warning system and a method for high-altitude installation objects, wherein in the safety early warning system, a monitoring sensor module comprises an MEMS (micro electro mechanical system) triaxial acceleration sensor and an absolute pressure sensor, an early warning module comprises a field early warning module and a remote early warning module, and the remote early warning module comprises a communication module and a remote early warning monitoring platform; the monitoring sensor module, the field early warning module, the safety evaluation module and the energy management module are integrally packaged and fixed on an overhead installation object; the safety evaluation module judges the installation state of the high-altitude installation object according to the received monitoring data, sends an alarm instruction to the field early warning module when the high-altitude installation object inclines, moves or falls off, sends early warning information to the remote early warning monitoring platform through the communication module, and the field early warning module gives an alarm. According to the technical scheme, early warning information is provided for personnel around the high-altitude installation object and maintenance personnel, and the safety and the maintenance timeliness of the high-altitude installation object are improved.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a safety early warning system and a safety early warning method for high-altitude installation objects.
Background
At present, various high-altitude installation objects have the risks of inclination, movement or falling off. The existing high-altitude installation object cannot provide early warning under the condition of inclination, movement or falling, and the early warning provided for surrounding people has the condition of inclination, movement or falling and the early warning provided for maintenance personnel possibly has risks, so that the potential safety hazard and the untimely maintenance condition exist. The existing technology cannot solve the problems well by predicting that the inclination, the movement or the falling is possible or monitoring that the inclination, the movement or the falling is possible, and providing early warning in the inclination, the movement or the falling process.
Disclosure of Invention
Aiming at the problems, the invention provides a safety early warning system and a safety early warning method for high-altitude installation objects, wherein the installation state of the high-altitude installation objects is monitored by the cooperation of an MEMS (micro electro mechanical system) triaxial acceleration sensor and an absolute pressure sensor, and when the situation that the MEMS triaxial acceleration sensor and the absolute pressure sensor are in the inclined, moving or falling state is judged, an alarm instruction is sent to a field early warning module to give an alarm, early warning signals are provided for personnel around the high-altitude installation objects and maintenance personnel, and the safety and the maintenance timeliness of the high-altitude installation objects are improved.
In order to achieve the above object, the present invention provides a safety early warning system for high-altitude installation objects, comprising: the system comprises a monitoring sensor module, a safety evaluation module, an early warning module and an energy management module; the monitoring sensor module comprises an MEMS triaxial acceleration sensor and an absolute pressure sensor, the early warning module comprises a field early warning module and a remote early warning module, and the remote early warning module comprises a communication module and a remote early warning monitoring platform; the MEMS triaxial acceleration sensor and the absolute pressure sensor are respectively connected with the safety evaluation module, the safety evaluation module is respectively connected with the on-site early warning module and the communication module, and the communication module is connected with the remote early warning monitoring platform through wireless communication; the energy management module supplies power to the monitoring sensor module, the field early warning module, the safety evaluation module and the energy management module, and the monitoring sensor module, the field early warning module, the safety evaluation module, the communication module and the energy management module are integrally packaged and fixed on a high-altitude installation object; the safety evaluation module judges the installation state of the high-altitude installation object according to the received monitoring data of the MEMS triaxial acceleration sensor and the absolute pressure sensor, sends an alarm instruction to the field early warning module when the high-altitude installation object inclines, moves or falls off, sends early warning information to the remote early warning monitoring platform through the communication module, and the field early warning module gives an alarm according to the alarm instruction.
In the above technical solution, preferably, the safety assessment module includes a voltage measurement module, an analog-to-digital conversion module, and an MCU microprocessor calculation module, an input end of the voltage measurement module is connected to the MEMS triaxial acceleration sensor and the absolute pressure sensor, an output end of the voltage measurement module is connected to an input end of the analog-to-digital conversion module, an output end of the analog-to-digital conversion module is connected to the MCU microprocessor calculation module, the analog-to-digital conversion module converts an analog voltage value output by the sensor into a digital voltage value to be sent to the MCU microprocessor module, the MCU microprocessor calculation module is respectively connected to the field early warning module and the communication module, and the voltage measurement module is also respectively connected to the field early warning module and the communication module. In the above technical solution, preferably, the voltage measurement module calculates and judges analog voltage values transmitted from the MEMS triaxial acceleration sensor and the absolute pressure sensor, calculates an average value, an effective value, and a standard deviation of the analog voltage values, compares the average value, the effective value, and the standard deviation with a set threshold, and sends an alarm instruction to the on-site early warning module and the remote early warning monitoring platform; and the MCU microprocessor calculation module calculates and judges digital quantity voltage values transmitted by the MEMS triaxial acceleration sensor and the absolute pressure sensor, compares the digital quantity voltage values with preset change thresholds respectively, judges that the MEMS triaxial acceleration sensor or the absolute pressure sensor is in an inclined state, a moving state or a falling state if the voltage value variation is larger than the corresponding preset change threshold, and sends an alarm instruction to the field early warning module and the remote early warning monitoring platform.
In the above technical solution, preferably, if only the voltage value variation of the MEMS triaxial acceleration sensor exceeds a preset variation threshold, a first early warning state is triggered, if only the voltage value variation of the absolute pressure sensor exceeds the preset variation threshold, a second early warning state is triggered, if the voltage value variation of the MEMS triaxial acceleration sensor and the voltage value variation of the absolute pressure sensor both exceed respective preset variation thresholds, a third early warning state is triggered, wherein each early warning state has a first-level early warning, a second-level early warning and a third-level early warning according to a difference of a limit value.
In the above technical solution, preferably, the MCU microprocessor computing module sends different alarm instructions to the field early warning module according to the early warning states triggered by the MEMS triaxial acceleration sensor and/or the absolute pressure sensor, and the field early warning module sends different alarm signals according to different alarm instructions.
In the above technical scheme, preferably, the on-site early warning module includes an LED lamp and a buzzer, and when the on-site early warning module receives the alarm instruction sent by the MCU microprocessor computing module, the LED lamp is turned on and the buzzer sounds, and for different alarm instructions, the lighting mode of the LED lamp and/or the sounding mode of the buzzer are different.
In the above technical solution, preferably, the MCU microprocessor computing module further sends all the received raw data and analysis results of the digital voltage values of the MEMS triaxial acceleration sensor and the absolute pressure sensor to the remote early warning monitoring platform through the communication module; or, the original data and the analysis data of which the voltage value variation is greater than the corresponding preset variation threshold value are sent to the remote early warning monitoring platform through the communication module or stored in a built-in storage of the MCU microprocessor computing module; or the original data and the analysis result of which the digital quantity voltage value variation is larger than the corresponding preset variation threshold value are sent to the remote early warning monitoring platform through the communication module or stored in the built-in storage of the MCU microprocessor calculation module.
In the above technical solution, preferably, a plurality of absolute pressure sensors are disposed on the same high-altitude installation object or a plurality of different high-altitude installation objects to form a spatial detection array structure in combination.
The invention also provides a safety early warning method for high-altitude installation objects, which is applied to the safety early warning system in any one of the technical schemes and comprises the following steps: acquiring voltage values of an MEMS triaxial acceleration sensor and an absolute pressure sensor; calculating and analyzing voltage values of the MEMS triaxial acceleration sensor and the absolute pressure sensor; if the voltage value variation of the MEMS triaxial acceleration sensor and/or the absolute pressure sensor is larger than a preset variation threshold, determining that an overhead installation object where the MEMS triaxial acceleration sensor and the absolute pressure sensor are located is in an inclined, moving or falling state; sending an alarm instruction to a field early warning module when the high-altitude installation object is judged to be in an inclined, moving or falling state, and sending early warning information to a remote early warning monitoring platform through a communication module; and the field alarm module sends out an alarm signal according to the alarm instruction.
In the foregoing technical solution, preferably, when determining whether a voltage value variation of the MEMS triaxial acceleration sensor and/or the absolute pressure sensor is greater than a preset variation threshold:
according to the received voltage values of the MEMS triaxial acceleration sensor and the absolute pressure sensor, effective values, average values and standard deviations of analog quantity voltage values representing acceleration, displacement and absolute pressure can be obtained through calculation of a voltage measurement module, and effective values, average values, standard deviations and FFT spectrums of digital quantity voltage values can also be obtained through calculation of an MCU microprocessor calculation module; when the effective value, the average value, the standard deviation and the FFT frequency spectrum of the voltage values representing the acceleration, the displacement and the absolute pressure exceed respective preset thresholds or any one of the effective value, the average value, the standard deviation and the FFT frequency spectrum exceeds the respective preset threshold, the voltage value variation of the corresponding MEMS triaxial acceleration sensor or the corresponding absolute pressure sensor is judged to exceed a preset variation threshold; if the voltage value variation of the MEMS triaxial acceleration sensor exceeds a preset variation threshold, triggering a first early warning state, if the voltage value variation of the absolute pressure sensor exceeds the preset variation threshold, triggering a second early warning state, and if the voltage value variations of the MEMS triaxial acceleration sensor and the absolute pressure sensor exceed respective preset variation thresholds, triggering a third early warning state, wherein each early warning state has a first-stage early warning, a second-stage early warning and a third-stage early warning according to different limit values; and sending different alarm instructions to the field early warning module according to the early warning states triggered by the MEMS triaxial acceleration sensor and/or the absolute pressure sensor and different early warning levels in each early warning state.
Compared with the prior art, the invention has the beneficial effects that: the installation state of the high-altitude installation object is monitored through the cooperation of the MEMS triaxial acceleration sensor and the absolute pressure sensor, when the situation that the MEMS triaxial acceleration sensor and the absolute pressure sensor are in an inclined, moving or falling state is judged, an alarm instruction is sent to the field early warning module to give an alarm, early warning signals are provided for personnel around the high-altitude installation object and maintenance personnel, and the safety and the maintenance timeliness of the high-altitude installation object are improved.
Drawings
Fig. 1 is a block diagram schematically illustrating a safety warning system for high-altitude installations according to an embodiment of the present invention;
FIG. 2 is a block diagram of a security assessment module according to an embodiment of the present invention;
FIG. 3 is a block diagram schematically illustrating the structure of a computing module of an MCU microprocessor according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a safety early warning method for high-altitude installation objects according to an embodiment of the present invention.
In the drawings, the correspondence between each component and the reference numeral is:
11, an MEMS triaxial acceleration sensor, 12, an absolute pressure sensor, 2, a safety evaluation module, 21, a voltage measurement module, 22, an analog-to-digital conversion module, 23, an MCU microprocessor calculation module, 31, a field early warning module, 32, a communication module, 33, a remote early warning monitoring platform and 4, an energy management module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1, the safety precaution system for high-altitude installation object provided by the invention comprises: the system comprises a monitoring sensor module, a safety evaluation module, an early warning module and an energy management module; the monitoring sensor module comprises an MEMS triaxial acceleration sensor 11 and an absolute pressure sensor 12, the early warning module comprises a field early warning module 31 and a remote early warning module, and the remote early warning module comprises a communication module 32 and a remote early warning monitoring platform 33; the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 are respectively connected with the safety evaluation module 2, the safety evaluation module 2 is respectively connected with the on-site early warning module 31 and the communication module 32, and the communication module 32 is connected with the remote early warning monitoring platform 33 through wireless communication; the energy management module 4 supplies power to the monitoring sensor module, the field early warning module 31, the safety evaluation module 2 and the energy management module 4, and the monitoring sensor module, the field early warning module 31, the safety evaluation module 2, the energy management module 4 and the communication module 32 are integrally packaged and fixed on a high-altitude installation object; the safety evaluation module 2 judges the installation state of the high-altitude installation object according to the received monitoring data of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12, sends an alarm instruction to the field early warning module 31 when the high-altitude installation object inclines, moves or falls off, sends early warning information to the remote early warning monitoring platform 33 through the communication module 32, and the field early warning module 31 gives an alarm according to the alarm instruction.
In the embodiment, the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 are fixedly mounted on the high-altitude mounting object, whether the output voltage value variation of the two sensors exceeds a preset variation threshold value is judged according to the monitored output voltage values of the two sensors, so that whether the high-altitude mounting object inclines, moves or falls is judged, an alarm signal is sent out through the field early warning module 31 when the high-altitude mounting object inclines, moves or falls, early warning signals are provided for personnel around the high-altitude mounting object and maintenance personnel, and the safety and the maintenance timeliness of the high-altitude mounting object are improved.
Wherein, in order to prevent the sensor itself from falling the safe risk that leads to, with the integrative encapsulation of monitoring sensor module, on-the-spot early warning module 31, safety assessment module 2 and energy management module 4 for a slice sheet structure, sheet structure has enough big surface area and the weight of light as far as possible, and the sheet structure is attached to be fixed in the high altitude installation thing, reduces the risk that the sheet structure of integrative encapsulation falls.
Specifically, through built-in MEMS triaxial acceleration sensor 11 and absolute pressure sensor 12, if the monitoring sensor module takes place the high altitude and falls and incline, phenomenons such as removal, MEMS triaxial acceleration sensor 11's triaxial gesture can change, absolute pressure sensor 12's surface pressure can change, lead to its output voltage value to change, thereby play and judge that there is the high altitude that monitoring sensor module place high altitude installation thing falls and incline, the risk of removal, then provide the early warning for personnel around through built-in LED light and buzzer, provide the early warning for the maintenance monitoring personnel of remote early warning monitoring platform 33 through built-in communication module 32, realize the function of the early warning that falls.
The MEMS triaxial acceleration sensor 11 is used for measuring three-directional vibration acceleration of high-altitude installation and three-axial posture change, and whether the sensor is inclined or loosened and displaced is determined according to the three-axial posture change. The MEMS triaxial acceleration sensor 11 can sense X, Y, Z acceleration in three directions, if the sensor is fixed on a high-altitude installation structure, the attitude of the sensor is unchanged, and the reciprocating vibration in three directions at the position X, Y, Z of the sensor is measured. If high altitude installation thing takes place to incline, remove, fall or the sensor itself drops, the gesture of sensor changes, X, Y, Z axle's position can take place to rotate, to MEMS triaxial acceleration sensor 11, if do not have under the condition of vibration, in X, Y, Z direction, rotate 90 degrees along the pivot, the acceleration value of output can change, from 0 change to 1 g, the pivot rotates 180 degrees, the acceleration of output can change from 0 to 2 g, monitor through the baseline skew to the output acceleration value, can perceive whether the sensor is in the rotation state, a gyroscope's effect has been played, through the reciprocal vibration size or the gesture change to MEMS triaxial acceleration sensor 11, judge that the sensor is in the slope, remove or the state of falling.
The absolute pressure sensor 12 can measure an absolute air pressure value P of a position where an overhead installation object where the sensor is located, and can be used for assisting in determining whether the sensor falls off or not through the change of the absolute pressure value P; meanwhile, the consistency of the installation height can be determined according to the absolute pressure P, and the accuracy of centimeter level can be achieved. If the sensor is in the unmovable position, the measured air pressure can not change, if the high-altitude installation object falls or the sensor drops, the measured pressure can change, and the sensor is judged to be in a falling state according to the change of the measured pressure.
As shown in fig. 2, in the above embodiment, preferably, the safety evaluation module 2 includes a voltage measurement module 21, an analog-to-digital conversion module 22, and an MCU microprocessor calculation module 23, an input end of the voltage measurement module 21 is connected to the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12, an output end of the voltage measurement module 21 is connected to an input end of the analog-to-digital conversion module 22, an output end of the analog-to-digital conversion module 22 is connected to the MCU microprocessor calculation module 23, the analog-to-digital conversion module 22 converts an analog voltage value output by the voltage measurement module 21 into a digital voltage value and transmits the digital voltage value to the MCU microprocessor module, the MCU microprocessor calculation module 23 is respectively connected to the field early warning module 31 and the communication module, and the voltage measurement module 21 is also respectively connected to the field early warning module 31 and the communication module 32.
In the above embodiment, preferably, the voltage measuring module 21 calculates and judges the analog quantity voltage value voltage measuring module 21 of the outputs of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12, calculates an average value, an effective value, and a standard deviation of the analog quantity voltage value, compares the average value, the effective value, and the standard deviation with a set threshold, and sends an alarm instruction to the on-site early warning module 31 and the remote early warning monitoring platform 33; the MCU microprocessor calculation module 23 calculates and judges the digital voltage values transmitted from the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12, and compares the digital voltage values with a preset change threshold, and if the voltage value variation is greater than the corresponding preset change threshold, determines that the MEMS triaxial acceleration sensor 11 or the absolute pressure sensor 12 is in an inclined, moving or falling state, and sends an alarm instruction to the field early warning module 31 and the remote early warning monitoring platform 33.
Specifically, if the high-altitude installation object falls or the sensor falls, the output voltage value changes sharply, and the voltage value change amount of the high-altitude installation object and the sensor exceeds a preset change threshold value, so that the falling condition of the high-altitude installation object or the sensor can be judged.
Specifically, if the high-altitude installation object tilts or moves, the voltage value output by the MEMS acceleration sensor 11 changes correspondingly, and if the voltage value change exceeds a preset change threshold, it can be determined that the high-altitude installation object tilts or moves.
The voltage measuring module 21 analyzes the analog voltage value output by the sensor in time domain, integration, etc. to obtain the effective value, the average value, the standard deviation of the acceleration signal and the absolute pressure signal, and the effective value, the average value, and the standard deviation of the vibration displacement after integration, and if the variation of these parameters exceeds a certain threshold, it determines whether the inclination, movement, or falling-off condition occurs.
The MCU microprocessor calculating module 23 performs time domain or spectrum analysis on the digital value converted by the analog-to-digital conversion module 22 to determine whether the inclination, movement, or falling-off occurs. The analog-to-digital conversion module 22 quantizes the analog voltage value on the time axis and the amplitude axis according to the sampling frequency and the AD precision to form a digital acceleration signal and an absolute pressure signal. The MCU microprocessor module can perform time domain, integration and spectrum analysis on the acceleration signal and the absolute pressure signal of digital quantity to obtain parameters such as effective value, average value, standard deviation, FFT spectrum and the like of the signals; whether the inclination, movement or falling-off state occurs is judged by judging whether the variation of parameters such as effective values, average values, standard deviations, FFT spectrums and vibration displacement effective values, average values, standard deviations, FFT spectrums after integration of the acceleration signals and the absolute pressure signals exceed a certain threshold value. Meanwhile, the MCU microprocessor calculation module 23 stores the input digital voltage raw data and the corresponding calculation results, and transmits the raw data and the analysis results to the remote early warning monitoring platform 33 through the communication module 32, or directly derives the stored data from the sensors after the sensors and the high-altitude installation object fall off, and the stored data can store the state information of the sensors in the last period of time.
The safety early warning system for the high-altitude installation object, the analog-to-digital conversion module 22 and the MCU micro-processing calculation module 23 can be turned on or turned off according to the requirement of energy management.
Specifically, the calculation principle of each parameter is as follows:
effective value:
average value:
standard deviation:
FFT spectrum:
based on the parameters obtained by the voltage measuring module 21 or the MCU microprocessor calculating module 23, there are two ways to determine whether the sensor is in a tilted, moving or falling state:
the method comprises the following steps: the effective value and the standard deviation of the acceleration signal of the MEMS triaxial acceleration sensor 11 or the effective value and the standard deviation of the displacement signal after integration are changed and exceed the respective preset threshold values, and the high-altitude installation object is judged to be in an overlarge vibration state, so that potential safety hazards exist;
the second is as follows: the average value and the effective value of the acceleration signal of the MEMS triaxial acceleration sensor 11 or the average value and the effective value of the displacement signal after integration change and exceed the respective preset threshold values, and the high-altitude installation object is judged to be in an inclined or moving state;
the third is: the effective value, the average value and the standard deviation of the absolute pressure sensor 12 change and exceed the respective preset thresholds, and the acceleration and displacement signals of the MEMS triaxial acceleration sensor 11 do not exceed the thresholds, so that the high-altitude installation object is judged to be in the environment with continuously changed air pressure;
the fourth step is: the average value and the effective value of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 change and exceed the respective preset threshold values, and the high-altitude installation object or the sensor system is judged to be in a falling state;
the fifth step is: and the average value and the effective value of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 are changed and exceed the respective preset threshold values, and the high-altitude installation object or the sensor system is judged to be in a falling state.
In the implementation process, a person skilled in the art determines to select one of the above determination manners according to the type of the high-altitude installation object fixed by the sensor, or determines whether the high-altitude installation object and the sensor are in an inclined, moving or falling state according to whether one or more specific parameters exceed respective preset thresholds, and whether the high-altitude installation object and the sensor fall off together or the sensor falls off separately, which is not described herein again.
In the above embodiment, preferably, if only the voltage value variation of the MEMS triaxial acceleration sensor 11 exceeds a preset variation threshold, a first warning state is triggered, if only the voltage value variation of the absolute pressure sensor 12 exceeds the preset variation threshold, a second warning state is triggered, and if the voltage value variations of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 both exceed their respective preset variation thresholds, a third warning state is triggered, where each warning state has a primary warning, a secondary warning, and a tertiary warning according to a difference in limit values.
In the above embodiment, preferably, the voltage measurement module 21 or the MCU microprocessor calculation module 23 sends different alarm instructions to the on-site early warning module 31 according to the early warning states triggered by the MEMS triaxial acceleration sensor 11 and/or the absolute pressure sensor 12, and the on-site early warning module 31 sends different alarm signals according to different alarm instructions. Preferably, the on-site early warning module 31 includes an LED lamp and a buzzer, when the on-site early warning module 31 receives the alarm instruction sent by the MCU microprocessor calculation module 23, the LED lamp is turned on, and the buzzer sounds, and for different alarm instructions, the lighting mode of the LED lamp and/or the sounding mode of the buzzer are different.
For example, if only trigger first early warning state, then the LED lamp flashes the yellow light, and bee calling organ sends out and is interrupted the buzz, if only trigger second early warning state, then only the LED lamp flashes the blue light, if trigger third early warning state, then the LED lamp flashes the red light, and bee calling organ sends incessant buzz, is corresponding to different early warning grades, and the LED lamp can change flicker frequency or normal bright state.
As shown in fig. 3, in the above embodiment, preferably, the MCU microprocessor computing module 23 further sends all the received raw data and analysis results of the voltage values of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 to the remote early warning monitoring platform 33 through the communication module 32 or stores them in a built-in storage module of the MCU microprocessor computing module 23; or, the original data and the analysis data of which the voltage value variation is greater than the corresponding preset variation threshold are sent to the remote early warning monitoring platform 33 through the communication module 32 or stored in a built-in storage module of the MCU microprocessor calculation module 23.
In the above embodiment, the communication module 32 is a wireless communication module, and specifically includes a WIFI communication module, a bluetooth communication module, a 4G communication module, a 5G communication module, a ZigBee communication module, an NB-IOT communication module, or a Lora communication module.
Through the remote early warning detection platform, an instruction can be sent to the MCU microprocessor calculation module 23 through the communication module 32 so as to set parameters such as sampling frequency, start time, end time, a trigger sampling mode, FFT analysis point number and the like. The remote early warning monitoring platform 33 can also continuously perform scene training by using a neural network algorithm, so that the state of the sensor is judged by using the neural network.
In the above embodiment, it is preferable that a plurality of absolute pressure sensors 12 are provided on the same overhead installation or on a plurality of different overhead installations to combine to form a spatial detection array structure. By utilizing the height information converted by the air pressure information of the absolute pressure sensor 12, combining a height position system when the sensor system is installed and a space detection array structure formed between adjacent sensors, the detection data of different absolute pressure sensors 12 are comprehensively processed, so that false alarms can be obviously reduced, and the reliability of prediction is improved.
As shown in fig. 4, the present invention further provides a safety precaution method for high-altitude installation objects, which is applied to the safety precaution system in any one of the above embodiments, and includes: acquiring voltage values of an MEMS triaxial acceleration sensor 11 and an absolute pressure sensor 12; calculating and analyzing voltage values of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12; if the voltage value variation of the MEMS triaxial acceleration sensor 11 and/or the absolute pressure sensor 12 is larger than a preset variation threshold, determining that the high-altitude installation object where the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 are located is in an inclined, moving or falling state or the sensors are in a falling state; when the high-altitude installation object is judged to be in an inclined, moving or falling state or the sensor is in a falling state, an alarm instruction is sent to the field early warning module 31, and early warning information is sent to the remote early warning monitoring platform 33 through the communication module 32; and the field alarm module sends out an alarm signal according to the alarm instruction.
In the above embodiment, preferably, when determining whether the voltage value variation of the MEMS triaxial acceleration sensor 11 and/or the absolute pressure sensor 12 is greater than the preset variation threshold:
according to the received voltage values of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12, the effective value, the average value and the standard deviation of the analog quantity voltage values representing the vibration acceleration, the displacement and the absolute pressure can be obtained through calculation of the voltage measuring module 21, and the effective value, the average value, the standard deviation and the FFT frequency spectrum of the digital quantity voltage values can also be obtained through calculation of the MCU microprocessor calculating module 23; when the effective value, the average value, the standard deviation and the FFT frequency spectrum of the voltage values representing the vibration acceleration, the displacement and the absolute pressure exceed the respective preset threshold or any one of the effective value, the average value, the standard deviation and the FFT frequency spectrum exceeds the respective preset threshold, judging that the change quantity of the output voltage value of the corresponding MEMS triaxial acceleration sensor 11 or absolute pressure sensor 12 exceeds the preset change threshold; if the voltage value variation of the MEMS triaxial acceleration sensor 11 exceeds a preset variation threshold, triggering a first early warning state, if the voltage value variation of the absolute pressure sensor 12 exceeds a preset variation threshold, triggering a second early warning state, and if the voltage value variations of the MEMS triaxial acceleration sensor 11 and the absolute pressure sensor 12 both exceed respective preset variation thresholds, triggering a third early warning state; meanwhile, each early warning state has primary early warning, secondary early warning and tertiary early warning according to different limit values; according to the early warning states triggered by the MEMS triaxial acceleration sensor 11 and/or the absolute pressure sensor 12 and different early warning levels in each early warning state, different warning instructions are sent to the field early warning module 31 according to different early warning states.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The safety early warning system for the high-altitude installation object is characterized by comprising: the system comprises a monitoring sensor module, a safety evaluation module, an early warning module and an energy management module;
the monitoring sensor module comprises an MEMS triaxial acceleration sensor and an absolute pressure sensor, the early warning module comprises a field early warning module and a remote early warning module, and the remote early warning module comprises a communication module and a remote early warning monitoring platform;
the MEMS triaxial acceleration sensor and the absolute pressure sensor are respectively connected with the safety evaluation module, the safety evaluation module is respectively connected with the on-site early warning module and the communication module, and the communication module is connected with the remote early warning monitoring platform through wireless communication;
the energy management module supplies power to the monitoring sensor module, the field early warning module, the safety evaluation module and the energy management module, and the monitoring sensor module, the field early warning module, the safety evaluation module, the communication module and the energy management module are integrally packaged into a sheet structure and are attached and fixed to a high-altitude installation object;
the safety evaluation module judges the installation state of the high-altitude installation object according to the received monitoring data of the MEMS triaxial acceleration sensor and the absolute pressure sensor, sends an alarm instruction to the field early warning module when the high-altitude installation object inclines, moves or falls off, and sends early warning information to the remote early warning monitoring platform through the communication module, and the field early warning module gives an alarm according to the alarm instruction;
a plurality of absolute pressure sensors are arranged on the same high-altitude installation object or a plurality of different high-altitude installation objects to form a space detection array structure in a combined mode;
the safety evaluation module comprises a voltage measurement module, an analog-to-digital conversion module and an MCU (microprogrammed control unit) microprocessor calculation module, wherein the input end of the voltage measurement module is connected with the MEMS triaxial acceleration sensor and the absolute pressure sensor, the output end of the voltage measurement module is connected with the input end of the analog-to-digital conversion module, the output end of the analog-to-digital conversion module is connected with the MCU microprocessor calculation module, the analog-to-digital conversion module converts an analog quantity voltage value output by the sensor into a digital quantity voltage value to be sent to the MCU microprocessor calculation module, the MCU microprocessor calculation module is respectively connected with the field early warning module and the communication module, and the voltage measurement module is also respectively connected with the field early warning module and the communication module;
the voltage measurement module calculates and judges analog quantity voltage values transmitted by the MEMS triaxial acceleration sensor and the absolute pressure sensor, calculates an average value, an effective value and a standard deviation of the analog quantity voltage values, compares the average value, the effective value and the standard deviation with a set threshold value, and sends an alarm instruction to the field early warning module and the remote early warning monitoring platform;
the MCU microprocessor calculation module calculates and judges digital quantity voltage values transmitted by the MEMS triaxial acceleration sensor and the absolute pressure sensor, calculates an average value, an effective value, a standard deviation and a vibration frequency value of the digital quantity voltage values, compares the digital quantity voltage values with a preset change threshold value respectively, judges that the MEMS triaxial acceleration sensor or the absolute pressure sensor is in an inclined, moving or falling state if the voltage value variation is larger than the corresponding preset change threshold value, and sends an alarm instruction to the field early warning module and the remote early warning monitoring platform;
if the voltage value variation of the MEMS triaxial acceleration sensor exceeds a preset variation threshold, triggering a first early warning state, if the voltage value variation of the absolute pressure sensor exceeds the preset variation threshold, triggering a second early warning state, and if the voltage value variations of the MEMS triaxial acceleration sensor and the absolute pressure sensor exceed respective preset variation thresholds, triggering a third early warning state, wherein each early warning state has primary early warning and secondary early warning according to different limit values;
the MCU microprocessor computing module sends different alarm instructions to the field early warning module according to the early warning states triggered by the MEMS triaxial acceleration sensor and/or the absolute pressure sensor, and the field early warning module sends different alarm signals according to different alarm instructions.
2. The safety early warning system for high-altitude installations according to claim 1, characterized in that the field early warning module comprises an LED lamp and a buzzer, the LED lamp is on and the buzzer sounds when the field early warning module receives the alarm instruction sent by the MCU microprocessor computing module, and the lighting mode of the LED lamp and/or the sounding mode of the buzzer are different for different alarm instructions.
3. The safety early warning system for high-altitude installations according to claim 1, characterized in that the MCU microprocessor computing module further transmits the received raw data and analysis results of the digital magnitude voltage values of the MEMS triaxial acceleration sensor and the absolute pressure sensor to the remote early warning monitoring platform through the communication module or stores them in a built-in memory of the MCU microprocessor computing module; or the like, or, alternatively,
and sending the original data and the analysis result of which the digital quantity voltage value variation is larger than the corresponding preset variation threshold value to the remote early warning monitoring platform through the communication module or storing the original data and the analysis result in the built-in storage of the MCU microprocessor calculation module.
4. A safety early warning method for high-altitude installation objects, which is applied to the safety early warning system as claimed in any one of claims 1 to 3, and is characterized by comprising the following steps:
acquiring voltage values of an MEMS triaxial acceleration sensor and an absolute pressure sensor;
calculating and analyzing voltage values of the MEMS triaxial acceleration sensor and the absolute pressure sensor;
if the voltage value variation of the MEMS triaxial acceleration sensor and/or the absolute pressure sensor is larger than a preset variation threshold, determining that an overhead installation object where the MEMS triaxial acceleration sensor and the absolute pressure sensor are located is in an inclined, moving or falling state;
sending an alarm instruction to a field early warning module when the high-altitude installation object is judged to be in an inclined, moving or falling state, and sending early warning information to a remote early warning monitoring platform through a communication module;
the field alarm module sends out an alarm signal according to the alarm instruction;
when judging whether the voltage value variation of the MEMS triaxial acceleration sensor and/or the absolute pressure sensor is larger than a preset variation threshold value:
according to the received voltage values of the MEMS triaxial acceleration sensor and the absolute pressure sensor, the effective value, the average value and the standard deviation of the analog quantity voltage value can be obtained through calculation of a voltage measurement module, and the effective value, the average value, the standard deviation and the FFT frequency spectrum of the digital quantity voltage value can also be obtained through calculation of an MCU microprocessor calculation module;
when the effective value, the average value, the standard deviation and the FFT frequency spectrum of the voltage value exceed respective preset thresholds or any one exceeds the respective preset threshold, judging that the voltage value variation of the corresponding MEMS triaxial acceleration sensor or the corresponding absolute pressure sensor exceeds a preset variation threshold;
if the voltage value variation of the MEMS triaxial acceleration sensor exceeds a preset variation threshold, triggering a first early warning state, if the voltage value variation of the absolute pressure sensor exceeds the preset variation threshold, triggering a second early warning state, and if the voltage value variations of the MEMS triaxial acceleration sensor and the absolute pressure sensor exceed respective preset variation thresholds, triggering a third early warning state, wherein each early warning state has a first-stage early warning, a second-stage early warning and a third-stage early warning according to different limit values;
and sending different alarm instructions to the field early warning module according to the early warning states triggered by the MEMS triaxial acceleration sensor and/or the absolute pressure sensor and different early warning levels in each early warning state.
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