CN101835178B - Method for realizing remote wireless monitoring and wireless monitoring device - Google Patents
Method for realizing remote wireless monitoring and wireless monitoring device Download PDFInfo
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Abstract
The invention discloses a method for realizing remote wireless monitoring and a wireless monitoring device. The method comprises the following steps of: sensing and acquiring an analog sensing signal in real time; filtering the acquired analog sensing signal according to a preset filtering strategy; when a first triggering signal is received, outputting the acquired analog sensing signal for analog-to-digital (A/D) conversion to form a digital sampling signal, sending the digital sampling signal through a wireless communication module, performing timing at the same time, and at a set sampling time, generating and outputting a second triggering signal; and when the second triggering signal is received or no triggering signal is received, comparing a level value of the acquired analog sensing signal with a preset level threshold, and if the level value of the acquired analog sensing signal is more than the preset level threshold, triggering and outputting the first triggering signal. Through the method and the device, the related information of an emergency can be acquired in time and the working time of the wireless monitoring device can be ensured.
Description
Technical field
The present invention relates to wireless sensor network long-distance wireless monitoring technology, particularly a kind of method and wireless monitoring device of realizing long-distance wireless monitoring.
Background technology
Obtaining relevant Monitoring Data by engineering structure, rotating machinery, environment etc. are carried out long-term remote online monitoring, for structural design provides design considerations, is the important application and development direction of wireless sensor network technology.Wherein, for random some accident that occurs in the long term monitoring process, be again the emphasis of on-line monitoring, the Monitoring Data when obtaining the accident generation has great importance in practice.For example, the heavy construction structure is carried out long-term remote online monitoring to monitor the accidents such as typhoon, earthquake to obtain Monitoring Data, analyze it to the impact of engineering structure generation and railway, bridge monitored obtain Monitoring Data, with the research train by the time on the impact of its structure, for subsequent analysis, design and improvement provide reference; In addition, building is carried out temperature monitoring, can be when the accidents such as fire occur the Real-time Obtaining Monitoring Data, carry out and alarm, to reduce loss.
Fig. 1 is the structural representation of existing wireless monitoring device.Referring to Fig. 1, this wireless monitoring device is a wireless sensor network node, comprising: transducer, mould/number (A/D, Analog/Digital) conversion module, CPU module, wireless communication module and power module, wherein,
Transducer is used for thing to be collected is carried out perception, obtains the simulation perceptual signal, exports the A/D conversion module to;
In practical application, thing to be collected can be engineering mechanical device, can be also building, can also be the object that railroad bridge etc. need to be monitored.
The A/D conversion module is used for the simulation perceptual signal that receives is carried out the A/D conversion, forms digital sampled signal, exports the CPU module to;
The CPU module is used for according to the Processing Algorithm that sets in advance, the digital sampled signal of input being processed, being calculated, and obtains the relevant physical quantity of sampled signal, exports wireless communication module to;
In practical application, Processing Algorithm can arrange as required, and for example, for accidents such as monitoring typhoon, earthquakes, Processing Algorithm can be acceleration calculation algorithm and vibration amplitude computational algorithm etc., and relevant physical quantity is acceleration or vibration amplitude; And for accidents such as temperature monitorings, Processing Algorithm can be the temperature computation algorithm, and relevant physical quantity is the temperature amplitude.
Wireless communication module is used for that the information exchange of CPU module output is crossed wireless mode and is sent to monitoring center, so that the staff of monitoring center makes a concrete analysis of, judges according to the information of obtaining;
In practical application, after the staff of monitoring center obtains relevant information, for example, and for acceleration or vibration amplitude, can analyzed vortex, intensity and the duration of the accident such as earthquake; For accidents such as temperature monitorings, can judge whether to occur fire alarm, in order in time take measures.
Power module is used to transducer, A/D conversion module, CPU module and wireless communication module to provide work required operating voltage.
In practical application, when wireless monitoring device was in running order, A/D conversion module wherein, CPU module and wireless communication module all needed to consume larger energy, and power consumption is larger; And the transducer that needs voltage to drive for a part is because it is in acquisition state always, power consumption is also larger, and power module uses battery that power supply is provided usually, due to finite energy, make the wireless monitoring device operating time shorter, need often to change battery.in order to improve the operating time of wireless monitoring device, in prior art, Innovative method is by each node of wireless monitoring device is set, for example, transducer, the A/D conversion module, the CPU module, wireless communication module is in deep sleep state in the dormancy period of setting, resting state comprises that module is in "on" position but does not work, be that holding state and the working power of cutting off module make module be in off-position, thing to be collected is not sampled and processed, and in the wake-up period of setting, wake each node up and enter operating state, gather Monitoring Data, process and transmit, waking up herein comprises: for being in "on" position but idle module, this module directly enters operating state, and for the module that is in off-position, the working power of being responsible for this module of conducting makes it enter operating state, dormancy period and wake-up period hocket.Like this, the dormancy period of setting is longer, wake-up period is shorter, and the average energy consumption of device is just lower, and battery also just can be worked the longer time, thereby has effectively extended the operating time of wireless monitoring device.
but above-mentioned by setting dormancy period, wake-up period extends the method for wireless monitoring device operating time, because the dormancy period of setting is generally minute even hour rank, like this, when node is in resting state, must miss the unexpected incidents of random generation, and catch less than to the Monitoring Data in the significant accident process of monitoring target, thereby, can not in time obtain the relevant information of accident in the very first time that accident occurs, for example, earthquake intensity information or fire alarm information, for instance, for accidents such as earthquakes, its duration may be only several seconds to tens seconds, if dormancy period is set as minute, when earthquake occurs, wireless monitoring device may be in resting state, thereby can not obtain relevant seismic monitoring data.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that realizes long-distance wireless monitoring, can in time obtain the relevant information of accident, and can ensure the operating time of wireless monitoring device.
Another object of the present invention is to provide a kind of wireless monitoring device, can in time obtain the relevant information of accident, and can ensure the operating time of wireless monitoring device.
For achieving the above object, the method for long-distance wireless monitoring provided by the invention, the method comprises:
The transducer real-time perception is obtained the simulation perceptual signal;
Filtration module carries out filtering according to predefined filtering strategies to the simulation perceptual signal that obtains, when receiving the first triggering signal, export the simulation perceptual signal that obtains to the A/D conversion module, when receiving the second triggering signal or not receiving triggering signal, export the simulation perceptual signal that obtains to comparator;
The A/D conversion module carries out the A/D conversion with the simulation perceptual signal of filtering, forms digital sampled signal;
Comparator compares simulation perceptual signal level value and the predefined level threshold of filtering, if simulation perceptual signal level value is greater than predefined level threshold, to CPU module output triggering signal;
The CPU module receives the triggering signal of comparator output, to filtration module output the first triggering signal, receive the digital sampled signal of A/D conversion module output, send by wireless communication module, and carry out timing, the sampling time that arranges then, generate also to filtration module output the second triggering signal.
The step of the digital sampled signal of described reception A/D conversion module output further comprises:
The CPU module is processed the digital sampled signal that receives according to the Processing Algorithm that sets in advance, obtain the relevant physical quantity of sampled signal, if be defined as accident, carry out the described step that sends by wireless communication module, otherwise, to filtration module output the second triggering signal.
Further comprise: if the CPU module is defined as accident, to A/D conversion module output the 3rd triggering signal;
The A/D conversion module improves sample rate according in advance setting under the control of the 3rd triggering signal, the simulation perceptual signal of filtering is carried out the A/D conversion, forms digital sampled signal.
The time and the monitoring application requirements that continue according to accident arrange the described sampling time.
A kind of method that realizes long-distance wireless monitoring, the method comprises:
Transducer real-time perception in the wake-up period that sets in advance is obtained the simulation perceptual signal, stops perception in the dormancy period that sets in advance;
Filtration module carries out filtering according to predefined filtering strategies to the simulation perceptual signal that obtains, when receiving the first triggering signal, export the simulation perceptual signal that obtains to the A/D conversion module, when receiving the second triggering signal or not receiving triggering signal, export the simulation perceptual signal that obtains to comparator;
The A/D conversion module carries out the A/D conversion with the simulation perceptual signal of filtering, forms digital sampled signal;
Comparator compares simulation perceptual signal level value and the predefined level threshold of filtering, if simulation perceptual signal level value is greater than predefined level threshold, to CPU module output triggering signal;
The CPU module, is controlled transducer and is carried out real-time perception in wake-up period according to the wake-up period and the dormancy period that set in advance, in dormancy period, controls transducer and stops perception; Receive the triggering signal of comparator output, to filtration module output the first triggering signal, receive the digital sampled signal of A/D conversion module output, send by wireless communication module, and carry out timing, the sampling time that arranges then, generate also to filtration module output the second triggering signal.
A kind of wireless monitoring device, this device comprises: transducer, filtration module, comparator, A/D conversion module, CPU module, wireless communication module and power module, wherein,
Transducer is used for thing to be collected is carried out perception, obtains the simulation perceptual signal, exports filtration module to;
Filtration module, be used for the simulation perceptual signal of transducer output is carried out filtering according to predefined filtering strategies, after receiving the first triggering signal, export the simulation perceptual signal of filtering to the A/D conversion module, after receiving the second triggering signal, export the simulation perceptual signal of filtering to comparator;
Comparator, the simulation perceptual signal for the module output that accepts filter compares with predefined level threshold, when simulating the perceptual signal level value greater than predefined level threshold, to CPU module output triggering signal;
The A/D conversion module is used for the simulation perceptual signal that receives is carried out the A/D conversion, forms digital sampled signal, exports the CPU module to;
The CPU module is used for receiving the triggering signal that comparator is exported, to filtration module output the first triggering signal; Receive the digital sampled signal of A/D conversion module output, export wireless communication module to, and carry out timing, the sampling time that arranges then, to filtration module output the second triggering signal;
Wireless communication module is used for that the information exchange of CPU module output is crossed wireless mode and sends;
Power module is used to transducer, filtration module, comparator, A/D conversion module, CPU module and wireless communication module to provide work required operating voltage.
Described filtration module is high pass filter or band pass filter, described device further comprises: adder, be used for the simulation perceptual signal of transducer output is carried out add operation, the level value of simulation perceptual signal is drawn high predefined level value and exported filtration module to.
Described CPU module is further used for after the digital sampled signal that receives the output of A/D conversion module, according to the Processing Algorithm that sets in advance, the digital sampled signal of input is processed, obtain the relevant physical quantity of sampled signal, determine whether accident, if be defined as accident, execution exports the flow process of wireless communication module to, otherwise, to filtration module output the second triggering signal.
Described CPU module is further used for after being defined as accident, to A/D conversion module output the 3rd triggering signal;
The A/D conversion module improves sample rate according in advance setting under the control of the 3rd triggering signal, the simulation perceptual signal of filtering is carried out the A/D conversion, forms digital sampled signal.
Further comprise: digital adjustable potentiometer, according to the level threshold parameter that the CPU module sets in advance, the level threshold that adjusts the output to comparator is magnitude of voltage corresponding to level threshold parameter that the CPU module arranges.
Further comprise: catch period controller, be used for receiving the first triggering signal of CPU module output, wake A/D conversion module, CPU module and wireless communication module up and enter mode of operation, receive the second triggering signal of CPU module output, A/D conversion module, CPU module and wireless communication module are placed in resting state.
A kind of wireless monitoring device, this device comprises: transducer, filtration module, comparator, A/D conversion module, CPU module, wireless communication module and power module, wherein,
Transducer is used in the wake-up period that sets in advance, thing to be collected being carried out real-time perception under the control of CPU module, obtains the simulation perceptual signal, exports filtration module to, stops perception in the dormancy period that sets in advance;
Filtration module, be used for the simulation perceptual signal of transducer output is carried out filtering according to predefined filtering strategies, after receiving the first triggering signal, export the simulation perceptual signal of filtering to the A/D conversion module, after receiving the second triggering signal, export the simulation perceptual signal of filtering to comparator;
Comparator, the simulation perceptual signal for the module output that accepts filter compares with predefined level threshold, when simulating the perceptual signal level value greater than predefined level threshold, to CPU module output triggering signal;
The A/D conversion module is used for the simulation perceptual signal that receives is carried out the A/D conversion, forms digital sampled signal, exports the CPU module to;
The CPU module is used for according to the wake-up period and the dormancy period that set in advance, in wake-up period, controls transducer and carries out real-time perception, in dormancy period, controls transducer and stops perception; Receive the triggering signal of comparator output, to filtration module output the first triggering signal; Receive the digital sampled signal of A/D conversion module output, export wireless communication module to, and carry out timing, the sampling time that arranges then, to filtration module output the second triggering signal;
Wireless communication module is used for that the information exchange of CPU module output is crossed wireless mode and sends;
Power module is used to transducer, filtration module, comparator, A/D conversion module, CPU module and wireless communication module to provide work required operating voltage.
Further comprise the switch that is arranged between power module and transducer, described CPU module is in wake-up period, switch between turn-on power module and transducer carries out real-time perception to control transducer, in dormancy period, the switch between power cutoff module and transducer stops perception to control transducer.
As seen from the above technical solutions, a kind of method and wireless monitoring device of realizing long-distance wireless monitoring provided by the invention, the transducer real-time perception is obtained the simulation perceptual signal; Filtration module carries out filtering according to predefined filtering strategies to the simulation perceptual signal that obtains, when receiving the first triggering signal, export the simulation perceptual signal that obtains to the A/D conversion module, when receiving the second triggering signal or not receiving triggering signal, export the simulation perceptual signal that obtains to comparator; The A/D conversion module carries out the A/D conversion with the simulation perceptual signal of filtering, forms digital sampled signal; Comparator compares simulation perceptual signal level value and the predefined level threshold of filtering, if simulation perceptual signal level value is greater than predefined level threshold, to CPU module output triggering signal; The CPU module receives the triggering signal of comparator output, to filtration module output the first triggering signal, receive the digital sampled signal of A/D conversion module output, send by wireless communication module, and carry out timing, the sampling time that arranges then, generate also to filtration module output the second triggering signal.Like this, by comparator being set to have determined whether accident, before accident occurs, A/D conversion module, CPU module and wireless communication module are not worked, can effectively reduce the power consumption of wireless monitoring device, simultaneously, whether comparator can occur in the Real-Time Monitoring accident, avoided leak the monitoring to accident, can in time obtain the relevant information of accident, and the sampling time is different from the mode that existing dormancy period, wake-up period circulate successively, greatly reduce the power consumption of whole device, ensured the operating time of wireless monitoring device.
Description of drawings
Fig. 1 is the structural representation of existing wireless monitoring device.
Fig. 2 is embodiment of the present invention wireless monitoring device structural representation.
Fig. 3 is the method flow schematic diagram that the embodiment of the present invention realizes long-distance wireless monitoring.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
In the embodiment of the present invention, by comparator is set, to simulate perceptual signal and predefined level threshold compares, if simulation perceptual signal level value is greater than predefined level threshold, triggering to the simulation perceptual signal sample, process, calculating and wireless transmission, if simulation perceptual signal level value is not more than predefined level threshold, do not process, reduced due to the simulation perceptual signal is sampled, processes, calculating and the required power consumption of wireless transmission; And, to the simulation perceptual signal sample, process, duration of calculating and wireless transmission is set to the time that accident continues, greatly reduce the time of device work, thereby extended the operating time of wireless monitoring device.
Fig. 2 is embodiment of the present invention wireless monitoring device structural representation.Referring to Fig. 2, this wireless monitoring device comprises: transducer, filtration module, comparator, A/D conversion module, CPU module, wireless communication module, catch period controller and power module, wherein,
Transducer is used in real time thing to be collected being carried out perception, obtains the simulation perceptual signal, exports filtration module to;
In practical application, gathering thing can be engineering mechanical device, can be also building, can also be the monitoring targets such as railroad bridge.
Transducer involving vibrations transducer, temperature sensor, air velocity transducer, strain transducer, light sensor, torque sensor etc., be configured according to actual needs the detecting sensor of perception accident or be used for the transducer of perception monitor signal, the transducer of perception accident can be the transducer of perception monitor signal, can be also independent detecting sensor.For example, the object of monitoring for needs is the situation of earthquake, can configure vibrating sensor, in order to the monitor earthquake accident; Object for the needs monitoring is typhoon, can configure vibrating sensor or air velocity transducer.
Filtration module, be used for the simulation perceptual signal of transducer output is carried out filtering according to predefined filtering strategies, when receiving the first triggering signal, export the simulation perceptual signal of filtering to the A/D conversion module, when receiving the second triggering signal or not receiving triggering signal, export the simulation perceptual signal of filtering to comparator;
In the present embodiment, predefined filtering strategies is determined according to the sensor senses object of configuration, for example, sensor senses object for configuration is the situation of earthquake, due to the concentration of energy of earthquake in low-frequency range, therefore, filtering strategies just can be low-pass filtering, be about to filtration module and be designed to low pass filter, in order to the simulation perceptual signal beyond low frequency is carried out filtering, to reduce the workload of follow-up comparison and calculating, reduce the power consumption of wireless monitoring device, simultaneously, reduce interference and the impact of other non-monitoring targets, improved the accuracy of monitoring.For example, when the health status of monitoring large scale structure, the structural response that the monitor earthquake accident produces is important, and knocks or high frequency response that other situations such as electromagnetic interference produce is lost interest in artificial, thereby, can be set to low pass filter by filtration module.Certainly, in practical application, also filtration module is set to high pass filter or band pass filter as required, and to being set to the situation of high pass or band pass filter, adder can be set, the simulation perceptual signal of transducer output is carried out add operation, the level value of simulation perceptual signal is drawn high predefined level value and exported filtration module to, so that the level of the simulation perceptual signal of filtration module filtering output is positive level, thereby simplify the design of follow-up comparator.
In practical application, during for the filtration module initialization, at this moment, do not receive any triggering signal, the default setting simulation perceptual signal that will obtain exports comparator to.
Comparator, the simulation perceptual signal for the module output that accepts filter compares with predefined level threshold, if simulation perceptual signal level value is exported triggering signal greater than predefined level threshold to the CPU module, otherwise, do not deal with; Certainly, level value also can be set less than predefined level threshold, to CPU output triggering signal, their essence is difference not.
In the present embodiment, predefined level threshold can arrange according to experience or known technological means according to aforesaid acquisition target, does not repeat them here.
Triggering signal can be predefined high or low level signal.
The A/D conversion module is used for the simulation perceptual signal that receives is carried out the A/D conversion, forms digital sampled signal, exports the CPU module to;
The CPU module be used for to receive the triggering signal of comparator output, to filtration module and catch period controller output the first triggering signal.Receive the digital sampled signal of A/D conversion module output, export wireless communication module to, and carry out timing, the sampling time that arranges then, to filtration module and catch period controller output the second triggering signal.
Interference due to other factors such as environment, the simulation perceptual signal that may make comparator receive triggers CPU module output the first triggering signal greater than predefined level threshold, the simulation perceptual signal is gathered, processes and sends by wireless communication module, cause the increase of wireless monitoring device power consumption and precision lower.Thereby, in the present embodiment, the CPU module is after the digital sampled signal that receives the output of A/D conversion module, according to the Processing Algorithm that sets in advance, the digital sampled signal of input is processed, obtain the relevant physical quantity of sampled signal, determine whether accident, if be defined as accident, execution exports the flow process of wireless communication module to, and follow-up receive the digital sampled signal of A/D conversion module output after, no longer process, directly exporting digital sampled signal to wireless communication module sends to reduce the power consumption that the CPU module is processed; Otherwise, export the simulation perceptual signal of filtering to comparator to filtration module output the second triggering signal to control filtration module, reduce the power consumption of A/D conversion module and CPU module.
Certainly, in practical application, in order further to reduce the power consumption of wireless monitoring device, the A/D conversion module also can carry out the A/D conversion to the simulation perceptual signal that receives according to different sampling policies.Like this, the CPU module is further after being defined as accident, to A/D conversion module output the 3rd triggering signal;
If the A/D conversion module does not receive the 3rd triggering signal, sample and the A/D conversion according to the first sampling policy that sets in advance, form digital sampled signal, export the CPU module to, the first sampling policy can be low sampling rate and shorter sampling period, like this, can reduce the sampling number in the first sampling policy, namely reduce the hits before accident occurs, thereby reduce the power consumption that gathers.And after receiving the 3rd triggering signal, sample and the A/D conversion according to the second sampling policy that sets in advance, form digital sampled signal, export the CPU module to, the second sampling policy can be high sampling rate and long sampling period, like this, can guarantee to obtain the accuracy of accident relevant information and enough amount of information.Arranging specifically of the first sampling policy and the second sampling policy can arrange according to actual needs, do not repeat them here.
In the present embodiment, can determine whether to have occured accident according to the feature of accident.For example, in temperature monitoring system, the accident that monitoring is concerned about is fire or the temperature accident that rises sharply, the feature of accident is that temperature continues to raise, not in the same time the temperature value that relatively collects of CPU module, if temperature value meets the rule of sustainable growth within the time that arranges, can determine to have occured accident, carry out the flow process that exports wireless communication module to; During if there is interference sample signals such as electromagnetic interference, owing to not meeting the rule of sustainable growth within the time that arranges, can be judged to be wrong report, to filtration module output the second triggering signal.in vibration monitor system, the accident that monitoring is concerned about is typhoon, earthquake etc., the feature of accident be gather complete cycle signal maximum and mean value, if the maximum that receives and mean value are all greater than the normal value that sets in advance, can be defined as having occured to cause the accident of structure generation large deformation, after the CPU module is determined the accident of needs to have occurred, the CPU module will be controlled each relevant portion of wireless monitoring device, begin to improve the continuous intensive image data of sample rate and process, analysis and calculation, exporting wireless communication module to sends, perhaps be stored in built-in memory.Certainly, also can confirm to send alarm signal after the accident that needing to occur.If the CPU module is judged to be the false triggering event, continue to wait for accident.
In practical application, Processing Algorithm can arrange as required, and for example, for accidents such as monitoring typhoon, earthquakes, Processing Algorithm can be acceleration calculation algorithm and vibration amplitude computational algorithm etc., and relevant physical quantity is acceleration or vibration amplitude; And for accidents such as temperature monitorings, Processing Algorithm can be the temperature computation algorithm, and relevant physical quantity is the temperature amplitude.
in the present embodiment, sampling time can be according to the characteristic of monitoring target, it is the time that accident continues, and/or, the monitoring application requirements arranges, for example, it is the situation of earthquake for monitoring target, the time that continues due to earthquake was generally several seconds zero point to tens seconds, thereby, it is 60 seconds or 120 seconds that sampling time can be set, like this, can carry out complete monitoring to earthquake conditions, after arriving the sampling time of setting, wireless monitoring device comes back to initial condition, situation about hocketing with respect to existing rest period and awake period, can greatly reduce power consumption.Certainly, also can according to actual needs, for example, because seismic frequency is generally several hertz to several hertz of zero points, also can be set to several complete earthquake periods the sampling time.In addition, sampling time can also judge whether accident is complete according to the relevant physical quantity characteristic value of the sampled signal of calculating, if the physical quantity characteristic value is less than the physical quantity eigenvalue threshold that sets in advance, wireless monitoring device comes back to initial condition.
Wireless communication module is used for that the information exchange of CPU module output is crossed wireless mode and sends;
In practical application, the CPU module can not processed the digital signal that receives, wireless communication module is crossed wireless mode with the information exchange of CPU module output and is sent to monitoring center, the staff who waits until monitoring center makes a concrete analysis of, processes, judges according to the information of obtaining, to reduce the power consumption of CPU module, extend its working life, after the staff of monitoring center obtains relevant information and processes, for example, for acceleration or vibration amplitude, can analyzed vortex, intensity and the duration of the accident such as earthquake; For accidents such as temperature monitorings, can judge whether to occur fire alarm, in order in time take measures.
Catch period controller, be used for receiving the first triggering signal of CPU module output, wake A/D conversion module, CPU module and wireless communication module up and enter mode of operation, receive the second triggering signal of CPU module output, A/D conversion module, CPU module and wireless communication module are placed in resting state;
In the present embodiment, institute it should be noted that catching period controller is not the requisite module of the present invention, is in order further to reduce the power consumption of wireless monitoring device, to control the operating state of each module to reduce power consumption by catching period controller.Certainly, catch period controller and also can be used for controlling the operating state of comparator and filtration module, but due in practical application, the power consumption when comparator and filtration module work is extremely low, can consider.
Power module is used to transducer, filtration module, comparator, A/D conversion module, CPU module, catches period controller and wireless communication module provides work required operating voltage.
by as seen above-mentioned, the wireless monitoring device of the embodiment of the present invention, by comparator being set and catching period controller, before accident occurs, catch period controller with the A/D conversion module, CPU module and wireless communication module are placed in resting state, make transducer, filtration module and comparator enter mode of operation, like this, can effectively reduce the power consumption of wireless monitoring device, can the Real-Time Monitoring accident whether occur simultaneously, avoided leak the monitoring to accident, and when accident occurs, in time wake the A/D conversion module up, CPU module and wireless communication module, make it to enter mode of operation, gather, obtain the relevant information of accident, because the characteristic parameter of sampling time according to each monitoring target arranges, after the sampling time, wireless monitoring device enters the dormancy monitoring, like this, not only can in time obtain the relevant information of accident, can also greatly reduce the power consumption of whole device, ensured the operating time of wireless monitoring device.
In above-mentioned wireless monitoring device, in comparator, predefined level threshold can be changed according to actual needs, to adapt to dissimilar monitoring target.Like this, wireless monitoring device further comprises: digital adjustable potentiometer, regulate self resistance according to the level threshold parameter that the CPU module arranges, and the level threshold that adjusts the output to comparator is magnitude of voltage corresponding to level threshold parameter that the CPU module arranges.Therefore, by the digital regulation resistance of regulation voltage output is set, the program control triggering level threshold value that arranges, make comparator more general neatly.One end of comparator be connected adjustable potentiometer and connect, the other end be connected filter circuit with transducer output connects, comparator is exported the interrupting input interface that is connected to the CPU module.
the output voltage of transducer and perception amount are linear, the sensor senses event, output simulation perceptual signal, it is voltage signal, after removing interference by filter circuit, input to comparator, compare with the predefined level threshold of comparator, when the output signal of transducer during greater than the predefined level threshold of comparator, comparator is to the triggering signal of the high or low level of middle fracture output of CPU module, wake the CPU module up by interrupt mode, the CPU module is to filtration module and catch period controller output the first triggering signal, the A/D conversion module carries out the A/D conversion according to the first sampling policy to the simulation perceptual signal that receives, the output digital sampled signal, the CPU module is calculated the digital sampled signal that receives, obtain the relevant physical quantity of sampled signal, if confirm as accident, to A/D conversion module output the 3rd triggering signal, after the A/D conversion module receives the 3rd triggering signal, according to the second sampling policy, the simulation perceptual signal that receives is carried out the A/D conversion, the output digital sampled signal is to the CPU module, the CPU module is exported the digital sampled signal of input to wireless communication module, and the sampling time that arranges then, to filtration module and catch period controller output the second triggering signal and enter park mode to control wireless monitoring device, institute it should be noted that, the CPU module is when park mode, can perception from the triggering signal of comparator.
The below lifts specific embodiment, and wireless monitoring device of the present invention is described.
Embodiment one:
In the present embodiment, transducer serviceability temperature transducer, velocity transducer, charge type vibrating sensor etc., these transducers all have extremely low power consumption or do not need working power to get final product work, and therefore, power module can provide keeps enough energy that the sensor is worked always.For the charge type sensor, need the Design enlargement modulate circuit, change aanalogvoltage output into the physical quantity with perception.The simulation perceptual signal of sensor senses carries out filtering through filtration module, removes and the incoherent signal of accident.Filtration module can be designed on demand by resistance and electric capacity, changes frequency band range by adjusting the capacitance-resistance value, can be designed to low pass, high pass or band pass filter.If filtration module uses high pass or band pass filter, so through needing to use adder to move filtered simulation perceptual signal to a stable positive voltage value place after high pass or band pass filter, to prevent negative voltage.The numeral adjustable potentiometer is connected with the CPU module, the CPU module is generally the microprocessors such as single-chip microcomputer of low-power consumption, by CPU module controls level threshold parameter, an input pin of level threshold access comparator, the another one input pin access transducer of comparator is through nursing one's health filtered output voltage signal, when sensor sensing arrives the accident output voltage greater than level threshold, the high or low warning pulse of comparator output, wake CPU module and correlation module thereof up and enter operating state, the output voltage signal of transducer is analyzed, calculated.
Embodiment two:
Transducer uses thermocouple sensor, strain transducer, power sensor, this class transducer usually needs driving voltage or provides power supply to work, for such transducer, if transducer is worked always, its power consumption is also larger, has reduced the operating time of wireless monitoring device.Thereby, in the present embodiment, for the not high accident of some requirement of real-times, in order further to extend the time of wireless monitoring device work, can between power module and transducer, switch be set, for example, the metal-oxide-semiconductor switch is by the CPU module or catch the break-make that period controller is controlled the metal-oxide-semiconductor switch.Catch period controller and be further used for controlling according to the wake-up period that sets in advance and dormancy period the break-make of metal-oxide-semiconductor switch, at dormancy period, turn-off the metal-oxide-semiconductor switch, power path between the module of cutting off the electricity supply and transducer is placed in resting state with A/D conversion module, CPU module and wireless communication module simultaneously; At wake-up period, conducting metal-oxide-semiconductor switch, the power path between turn-on power module and transducer, the CPU module is carried out to filtration module and catches the flow process that period controller is exported the first triggering signal after the triggering signal that receives comparator output.If the CPU module determines not have accident to occur, enter dormancy period in wake-up period; Occur if the CPU module defines accident in wake-up period, carry out to the flow process of A/D conversion module output the 3rd triggering signal.Like this, due in wake-up period, A/D conversion module in wireless monitoring device, CPU module and wireless communication module are also only just worked when being defined as accident, be in the situation of mode of operation with respect to existing wireless monitoring device in whole wake-up period, can extend its operating time.In practical application, can the dormancy period setting is shorter, not leak as far as possible accident.For example, come monitor temperature with thermocouple sensor, if the operating current of thermocouple sensor and filter circuit is 20mA, battery capacity is 2Ah, the shortest time of thermocouple sensor working stability is 10mS, and it is 10S that dormancy period can be set, and wake-up period is 20mS, like this, this wireless monitoring device can be worked more than 3 years.In practical application, if when wake-up period begins, determine not have accident to occur, also can enter immediately dormancy period.
Certainly, make module be in off-position to reduce the situation of power consumption for the working power of cutting off module, also can arrange by the CPU module between corresponding module and power module or catch the metal-oxide-semiconductor switch that period controller is controlled, do not repeat them here.
Wireless monitoring device in above-described embodiment two is identical with the structure of Fig. 2, does not repeat them here, and different from Fig. 2 is, the performed concrete function of transducer wherein and CPU module is different:
Transducer is used in the wake-up period that sets in advance, thing to be collected being carried out real-time perception under the control of CPU module, obtains the simulation perceptual signal, exports filtration module to, stops perception in the dormancy period that sets in advance;
The CPU module is used for according to the wake-up period and the dormancy period that set in advance, in wake-up period, controls transducer and carries out real-time perception, in dormancy period, controls transducer and stops perception; Receive the triggering signal of comparator output, to filtration module output the first triggering signal; Receive the digital sampled signal of A/D conversion module output, export wireless communication module to, and carry out timing, the sampling time that arranges then, to filtration module output the second triggering signal.
Below again the method that realizes long-distance wireless monitoring of the embodiment of the present invention is described.
Fig. 3 is the method flow schematic diagram that the embodiment of the present invention realizes long-distance wireless monitoring.Referring to Fig. 3, this flow process comprises:
Step 301, perception are obtained the simulation perceptual signal;
in this step, have extremely low power dissipation or do not need working power to get final product the transducer of work for temperature sensor, velocity transducer, charge type vibrating sensor etc., can continue real-time perception and obtain the simulation perceptual signal, like this, the transducer real-time perception is obtained the simulation perceptual signal, and for thermocouple sensor, strain transducer, the power sensor usually needs driving voltage or just workable transducer of power supply is provided, if with time of wireless monitoring device work as major consideration, namely for the not high accident of some requirement of real-times, for example, for situations such as fire alarms, dormancy period is set to 10S, wake-up period is set to 20mS, if fire alarm occurs in dormancy period, by the time wake-up period then, transducer is started working, perception fire alarm event also sends relevant information by wireless mode, little for the impact that the staff of monitoring center in time takes measures.Thereby, can between the power module of powering and transducer, switch be set, for example, the metal-oxide-semiconductor switch at dormancy period, turn-offs the metal-oxide-semiconductor switch, the power path between the module of cutting off the electricity supply and transducer; At wake-up period, conducting metal-oxide-semiconductor switch, the power path between turn-on power module and transducer namely arranges dormancy period and wake-up period, at dormancy period, stops perception; At wake-up period, carry out perception and obtain the step of simulation perceptual signal, to extend the time of wireless monitoring device work, like this, transducer real-time perception in the wake-up period that sets in advance is obtained the simulation perceptual signal, stops perception in the dormancy period that sets in advance.
Step 302 is carried out filtering according to predefined filtering strategies to the simulation perceptual signal that obtains, if receive the first triggering signal, execution in step 303 is if receive the second triggering signal, execution in step 304;
In this step, filtering strategies is determined according to the transducer acquisition target of configuration, for example, transducer acquisition target for configuration is the situation of earthquake, due to the concentration of energy of earthquake in low-frequency range, therefore, filtering strategies just can be low-pass filtering, in order to the simulation perceptual signal beyond low frequency is carried out filtering, to reduce the workload of follow-up comparison and calculating, reduce the power consumption of wireless monitoring device.
Step 303 is carried out the A/D conversion with the simulation perceptual signal of filtering, forms digital sampled signal, sends by wireless mode;
In this step, after forming digital sampled signal, can process according to the Processing Algorithm that sets in advance, obtain the relevant physical quantity of sampled signal; The physical quantity relevant according to sampled signal and the accident determination strategy that sets in advance determine whether accident, if be defined as accident, produce the 3rd triggering signal, export to control to the A/D conversion module sample rate that improves the A/D conversion module, carry out simultaneously timing, the sampling time that arranges then, generate and export the second triggering signal.
Step 304 compares simulation perceptual signal level value and the predefined level threshold of filtering, if simulation perceptual signal level value greater than predefined level threshold, execution in step 305, otherwise, do not deal with;
Step 305 generates and exports the first triggering signal, carries out timing, the sampling time that arranges then, generate and export the second triggering signal.
In this step, the simulation perceptual signal that the first triggering signal is used for controlling filtering carries out A/D conversion, processing and calculating, obtains the relevant physical quantity of sampled signal etc.; The simulation perceptual signal that the second triggering signal is used for controlling filtering compares, to determine whether to need to carry out A/D conversion, processing and calculating.
The first triggering signal, the second triggering signal and the 3rd triggering signal are generated and are exported by the CPU module, the CPU module is after generating the first triggering signal, each relevant portion with the wake on wireless monitoring device, the beginning image data and process, analysis and calculation, after generating the 3rd triggering signal, notice A/D conversion module improves sample rate and carries out continuous intensive collection, and sends by wireless mode; After generating the second triggering signal, each relevant portion of wireless monitoring device is placed in resting state.
Usually need driving voltage or just workable transducer of power supply is provided for thermocouple sensor etc., the CPU module can also according to the wake-up period and the dormancy period that set in advance, in wake-up period, be controlled transducer and carry out real-time perception, in dormancy period, control transducer and stop perception.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a method that realizes long-distance wireless monitoring, is characterized in that, the method comprises:
The transducer real-time perception is obtained the simulation perceptual signal;
Filtration module carries out filtering according to predefined filtering strategies to the simulation perceptual signal that obtains, when receiving the first triggering signal, export the simulation perceptual signal that obtains to the A/D conversion module, when receiving the second triggering signal or not receiving triggering signal, export the simulation perceptual signal that obtains to comparator;
The A/D conversion module carries out the A/D conversion with the simulation perceptual signal of filtering, forms digital sampled signal;
Comparator compares simulation perceptual signal level value and the predefined level threshold of filtering, if simulation perceptual signal level value is greater than predefined level threshold, to CPU module output triggering signal;
The CPU module receives the triggering signal of comparator output, to filtration module output the first triggering signal, receive the digital sampled signal of A/D conversion module output, send by wireless communication module, and carry out timing, the sampling time that arranges then, generate also to filtration module output the second triggering signal.
2. the method for claim 1, is characterized in that, the step of the digital sampled signal of described reception A/D conversion module output further comprises:
The CPU module is processed the digital sampled signal that receives according to the Processing Algorithm that sets in advance, obtain the relevant physical quantity of sampled signal, if be defined as accident, carry out the described step that sends by wireless communication module, otherwise, to filtration module output the second triggering signal.
3. method as claimed in claim 2, is characterized in that, further comprises: if the CPU module is defined as accident, to A/D conversion module output the 3rd triggering signal;
The A/D conversion module improves sample rate according in advance setting under the control of the 3rd triggering signal, the simulation perceptual signal of filtering is carried out the A/D conversion, forms digital sampled signal.
4. the method for claim 1, is characterized in that, the time and the monitoring application requirements that continue according to accident arrange the described sampling time.
5. a wireless monitoring device, is characterized in that, this device comprises: transducer, filtration module, comparator, A/D conversion module, CPU module, wireless communication module and power module, wherein,
Transducer is used for thing to be collected is carried out perception, obtains the simulation perceptual signal, exports filtration module to;
Filtration module, be used for the simulation perceptual signal of transducer output is carried out filtering according to predefined filtering strategies, after receiving the first triggering signal, export the simulation perceptual signal of filtering to the A/D conversion module, after receiving the second triggering signal, export the simulation perceptual signal of filtering to comparator;
Comparator, the simulation perceptual signal for the module output that accepts filter compares with predefined level threshold, when simulating the perceptual signal level value greater than predefined level threshold, to CPU module output triggering signal;
The A/D conversion module is used for the simulation perceptual signal that receives is carried out the A/D conversion, forms digital sampled signal, exports the CPU module to;
The CPU module is used for receiving the triggering signal that comparator is exported, to filtration module output the first triggering signal; Receive the digital sampled signal of A/D conversion module output, export wireless communication module to, and carry out timing, the sampling time that arranges then, to filtration module output the second triggering signal;
Wireless communication module is used for that the information exchange of CPU module output is crossed wireless mode and sends;
Power module is used to transducer, filtration module, comparator, A/D conversion module, CPU module and wireless communication module to provide work required operating voltage.
6. device as claimed in claim 5, it is characterized in that, described filtration module is high pass filter or band pass filter, described device further comprises: adder, be used for the simulation perceptual signal of transducer output is carried out add operation, the level value of simulation perceptual signal is drawn high predefined level value and exported filtration module to.
7. device as claimed in claim 6, it is characterized in that, described CPU module is further used for after the digital sampled signal that receives the output of A/D conversion module, according to the Processing Algorithm that sets in advance, the digital sampled signal of input is processed, obtained the relevant physical quantity of sampled signal, determine whether accident, if be defined as accident, execution exports the flow process of wireless communication module to, otherwise, to filtration module output the second triggering signal.
8. device as claimed in claim 7, is characterized in that, described CPU module is further used for after being defined as accident, to A/D conversion module output the 3rd triggering signal;
The A/D conversion module improves sample rate according in advance setting under the control of the 3rd triggering signal, the simulation perceptual signal of filtering is carried out the A/D conversion, forms digital sampled signal.
9. device as described in claim 5 to 8 any one, it is characterized in that, further comprise: digital adjustable potentiometer, according to the level threshold parameter that the CPU module sets in advance, the level threshold that adjusts the output to comparator is magnitude of voltage corresponding to level threshold parameter that the CPU module arranges.
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| CN102566542B (en) * | 2012-01-06 | 2014-03-26 | 北京必创科技有限公司 | Motor vehicle load safety monitoring system and method thereof |
| CN102740427B (en) * | 2012-06-15 | 2014-12-03 | 无锡必创传感科技有限公司 | Method for awakening wireless sensor, wireless sensor and wireless sensor system |
| CN103338477B (en) * | 2013-05-27 | 2016-09-28 | 中国科学院信息工程研究所 | A kind of intrusion target detection method based on road and system |
| CN104406404B (en) * | 2014-11-03 | 2016-07-27 | 中冶长天国际工程有限责任公司 | The maintaining method of a kind of temperature collecting device and attending device |
| CN106886174B (en) * | 2015-12-15 | 2019-03-29 | 航天科工惯性技术有限公司 | Debris flow infrasound signal front end post circuit |
| CN106452956B (en) * | 2016-09-30 | 2019-06-21 | 深圳市吉祥腾达科技有限公司 | A kind of Homeplug dormancy wake-up testing system and test method |
| CN107749157A (en) * | 2017-01-10 | 2018-03-02 | 浙江工业大学义乌科学技术研究院有限公司 | A kind of remote data acquisition system and its power consumption control method |
| CN106949042B (en) * | 2017-03-29 | 2018-05-29 | 深圳信息职业技术学院 | A kind of intelligence control system for air compressor machine |
| JP6930448B2 (en) * | 2018-02-01 | 2021-09-01 | オムロン株式会社 | Data sampling device and data sampling method |
| CN111243252B (en) * | 2018-11-13 | 2021-11-19 | 上海航兢电子科技有限公司 | Ultra-low power consumption wireless switch signal monitoring system |
| CN110672145B (en) * | 2019-09-27 | 2022-04-26 | 上海移为通信技术股份有限公司 | Sensor data acquisition and processing method, device, equipment and storage medium |
| CN111638676B (en) * | 2020-07-01 | 2021-07-16 | 吉林大学 | Energy-saving method applied to data acquisition control energy-saving system for active awakening |
| CN112863237B (en) * | 2021-01-07 | 2022-09-09 | 上海镭芯微电子股份有限公司 | Wireless networking method and system of parking space detection device |
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