CN104134311B - Traffic accident monitoring alarm device and method - Google Patents
Traffic accident monitoring alarm device and method Download PDFInfo
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- CN104134311B CN104134311B CN201410369805.3A CN201410369805A CN104134311B CN 104134311 B CN104134311 B CN 104134311B CN 201410369805 A CN201410369805 A CN 201410369805A CN 104134311 B CN104134311 B CN 104134311B
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Abstract
The invention provides a traffic accident monitoring alarm device and method. The traffic accident monitoring alarm device comprises a microcontroller, a first acceleration sensor, a second acceleration sensor and a communication module. The first acceleration sensor and the second acceleration sensor are used for acquiring a first acceleration value and a second acceleration value respectively. A first set value is set in the first acceleration sensor, and a second set value is set in the microcontroller. The traffic accident monitoring alarm method includes the steps that the first acceleration value of a guardrail is acquired through a first acceleration detection mode and compared with the first set value, when the first acceleration value is larger than or equal to the first set value, the second acceleration value is acquired after a second acceleration detection mode is started and compared with the second set value, and when the second acceleration value is larger than or equal to the second set value, traffic accident signals are transmitted. Traffic accidents can be preliminarily judged in time, alarm information is sent to a monitoring center, batteries supply power, power supply along highways is achieved, and power consumption is reduced by the adoption of a trigger mode.
Description
Technical field
The invention belongs to detection of electrons and alarm technique field, more particularly to a kind of vehicle accident monitoring alarm and its
Alarm method.
Background technology
The continuous 10 years ranking the first in the world of China's road fatalities, average death toll daily there are about 300
People, fatality rate reaches 17%, and than the 2% of developed country nearly 9 times are higher by.After vehicle accident occurs, particularly remote mountain areas and province
Where national highway is meagrely-populated, common guardrail does not have shock detection and warning function, when guardrail is clashed into, work
Personnel are difficult to obtain message in time.Due to can not in time find vehicle accident, report to the police in time, in time rescue, traffic accident fatality rate
Higher, statistics shows only 14.3% that rescue personnel reached in 60 minutes, there are about 60% and dies from and wait for rescue on the way.Collision
After guardrail accident often causes vehicle accident, highway protecting plate collision accident to occur, especially meet secondary vehicle accident and occur
When often cause traffic congestion, generally traffic control personnel can only passively obtain the warning message of accident.Cause at accident
Reason personnel cannot rapidly arrive to be taken in incident area before scene cannot not arrived at yet and warn other traffic participants to note peace
Full method.
At present, generally vehicle accident is monitored using video monitoring on expressway, but due to high cost, is difficult to realize system-wide
Section is covered.Therefore need to design a kind of vehicle accident monitoring alarm, realize that system-wide section is covered with rational cost, judge to send out
Make trouble thus the order of severity, realize long-range monitoring vehicle accident (particularly remote mountain areas and save national highway), so as to relevant department and
When make a response, so as to fast and accurately reach accident spot, prevent second accident from occurring, realize and alarm, in time rescue,
Reduce vehicle accident fatality rate purpose.
Due to needing to install a large amount of cables using wired power supply in Highways ', cost is too high, it has not been convenient to later maintenance.By
Big in highway dust, solaode plate surface can cover thick dust, cause solar panels efficiency to reduce, and it requires
Jing often carries out clean and maintenance, causes maintenance cost too high, solar powered mode also unsuitable for, it is therefore desirable to select a kind of confession
Electric convenient monitoring device, while in order that power supply has longer confession electric life, needing monitoring device to be low-power consumption.
The content of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of vehicle accident monitoring, alarming dress
Put and its alarm method, real-time monitoring can be carried out to rail collision and in time to Surveillance center's transmission alarm signal, while real
The now low-power consumption of whole monitoring process.
For achieving the above object and other related purposes, the present invention provides a kind of vehicle accident monitoring alarm, including：
First acceleration transducer, is arranged on the guardrail of the highway section that need to be monitored, for monitor guardrail collision when
The acceleration of vibration, and obtain the first accekeration；
Second acceleration transducer, is arranged on the guardrail of the highway section that need to be monitored, for monitor guardrail collision when
The acceleration of vibration, and obtain the second accekeration；
Microcontroller, is connected respectively with first acceleration transducer and the second acceleration transducer, is suitable to first
Setting value is set in the first acceleration transducer, and starts second acceleration transducer or by second acceleration
Sensor is standby, and the second setting value is provided with the microcontroller, and is suitable to second accekeration and described second
Setting value compares；
Communication module, is connected with the microcontroller, is suitable to receive the control signal of the microcontroller, by microcontroller
Start or close；
Wherein, first acceleration transducer is suitable to compare the first accekeration with first setting value, and
When first accekeration is more than first setting value, triggers the microcontroller and enter working condition, and cause the micro-control
Device processed starts the second acceleration transducer；First setting value as triggers threshold value, and the first acceleration transducer produces one and touches
Pulse is sent out, microcontroller is waken up and is entered working condition, the acceleration transducer of microprocessor controls second work, into sampling mould
Formula, that is, start the second acceleration transducer；
When the second accekeration is more than second setting value, the microcontroller judges vehicle accident, starts
Communication module, and control signal is sent to communication module, make the communication module send warning message；
Power consumption of the power consumption of first acceleration transducer less than second acceleration transducer.
Because existing acceleration transducer, measurement range low in energy consumption are narrower, sample rate is slightly slow, and measurement range width
Power consumption is high, sample rate is fast, general power consumption is that several microamperes of acceleration transducer its detection range is usually within 8g,
Power consumption is within more than 100 microamperes of acceleration transducer its detection range is 200g, and common rail collision accident its acceleration
Spend for a few to tens of microamperes, therefore only with an acceleration transducer can not take into account low-power consumption and compared with Wide measuring range
Require, so the first narrow acceleration transducer of low-power consumption detection range and a detection range width work(used in the present invention
The second higher acceleration transducer of consumption, holding state of the microcontroller in low-power consumption, the first acceleration transducer is located always
In opening, the second acceleration transducer is in holding state, and communication module is in power-off closed mode, is so constantly in
Only first acceleration transducer of working condition, first acceleration transducer plays Trigger Function, and triggering microcontroller works,
The acceleration transducer of microprocessor controls second works or standby, and communication module is also to need to trigger ability energization work, so
The power consumption of monitoring device system can be substantially reduced, device work is divided into standby mode and alarm mode both of which, standby mould
Formula monitoring collision occurs, and alarm mode processes collision warning, because collision is the event of very low probability, when standby mode works
Between more than more than 99%, as long as ensureing the super low-power consumption of standby mode, can just reduce overall power, when in use can entirely
Device is arranged on guardrail.
As preferred：The microcontroller is further adapted for when the first accekeration is detected, is controlled second acceleration and is passed
Sensor and microcontroller are standby, control the communication module and are in power-off closed mode；Open in second acceleration transducer
During beginning work, control the communication module and be in power-off closed mode；After the warning message sends, the communication mould is controlled
Block power-off, second acceleration transducer is standby, the work of the first acceleration transducer, and the microcontroller is standby.
Be in off-position during communication module normality, consumption electric energy that can be minimum, carry out signal transmitting do not carry out plus
Velocity measuring is urgent, therefore the startup that can just be powered after triggering below, and postponing transmitting in several seconds affects little, and the second acceleration
Sensor is in holding state, rather than off-position, is because after the first acceleration transducer is triggered, and needs by micro-control
Device processed wakes up the second acceleration transducer and immediately enters mode of operation, in case time delay causes measurement inaccurate.
As preferred：First acceleration transducer and the second acceleration transducer are capacitance acceleration transducer.
First acceleration transducer can be replaced with vibrating sensor, and its collision is judged by the way of measurement guardrail acceleration
Situation, it is also possible to realized by way of displacement.
As preferred：Also include power supply, Voltage stabilizing module and switch element, the power supply Jing Voltage stabilizing modules and the microcontroller
Device connects, and the switch element is connected between the power supply and the communication module, the switch element also with the micro-control
Device connection processed.Microcontroller sends control signal to switch element, controls the energization and power-off of communication module, and switch element can be adopted
Use field effect transistor.
By triggering mode, low-power consumption is solved the problems, such as, whole device can work more than 5 years in battery power supply mode, adopt
Powered with battery, overcome that electric lines of force power supply cost is high, the deficiency that later maintenance is inconvenient and solar powered, solved in public affairs
Curb line power difficulty a difficult problem, reduces cost.
As preferred：The power supply is composed in parallel by lithium battery and complex capacitance, the communication module be ZIGBEE,
WIFI, RF433M or GPRS module, using radio communication.
The present invention also provides a kind of vehicle accident alarming method by monitoring, comprises the following steps：
Step one：The acceleration of guardrail vibration is obtained in real time using the first acceleration detection pattern, and obtains the first acceleration
Angle value；
Step 2：The first accekeration obtained in step one is compared with default first setting value；If first
Accekeration is more than or equal to the first setting value, then into step 3, if the first accekeration is less than the first setting value, return step
Rapid one；
Step 3：The acceleration vibrated using the second acceleration detection pattern acquiring guardrail, and obtain the second accekeration；
Step 4：Second accekeration is compared with default second setting value；If second acceleration
Value is more than or equal to the second setting value, then be judged to vehicle accident, into step 5, if the second accekeration is less than the second setting
It is worth, then return to step one；
Step 5：Vehicle accident signal is sent, rail collision signal stops the second acceleration detection pattern after sending
Vehicle accident signal is sent with stopping；
Wherein, carried out using the first acceleration transducer in the first acceleration detection pattern, second acceleration
Carried out using the second acceleration transducer in detection pattern, and the power consumption of first acceleration transducer adds less than described second
The power consumption of velocity sensor.
As preferred：Carry out step for the moment, stop the second acceleration detection pattern and stop sending vehicle accident letter
Number.
As preferred：In the step 2, the first setting value is 6g.
G in 6g represents acceleration of gravity, and 6g represents 6 times of gravity acceleration values.
As preferred：In the step 3, the company that the second acceleration transducer is measured to the acceleration that guardrail vibrates
The continuous sampling time is at least 1 second.
As preferred：In the step 4, at least continuous 10 milliseconds of the second accekeration is more than the second setting value, then sentence
It is set to and there occurs vehicle accident.
Above-mentioned measurement process needs continuously to measure the accekeration in a period of time, is joined by continuous acceleration
Count to be judged and compared, rather than only test the value of a time point, it is to avoid instantaneous value affects measurement result.
In the step 5, send and waited for a period of time after vehicle accident signal, stop the second acceleration detection mould
Formula and stopping send vehicle accident signal.
Wait for a period of time to ensure sending for vehicle accident signal, stop the second acceleration detection pattern and stopping
Vehicle accident signal is sent, power consumption can be reduced so as under being operated in the low power consumpting state of the first acceleration detection pattern.
As preferred：Second setting value is more than first setting value, and second setting value is 25g.
First setting value is 6g, and the second setting value is the result drawn according to substantial amounts of sampling experimental for 25g, different
Sensor may have fluctuation in this value, but its detection method is identical.
General power consumption is that several microamperes of acceleration transducer its detection range is usually within 8g, and power consumption is micro- more than 100
The acceleration transducer of peace its detection range is within 200g, therefore the first acceleration detection pattern low-power consumption can be made to work.
As described above, the invention has the beneficial effects as follows：1st, vibration, the position of guardrail when colliding are monitored using acceleration transducer
The damaged condition of the features such as shifting, indirect monitoring vehicle accident collision severity and guardrail.By the apparatus and method energy and
When principium identification is carried out to vehicle accident and to Surveillance center warning message is sent simultaneously, so that relevant departments are located in time
Reason and rescue, so as to avoid the accident because can not in time find the people life property loss that accident and rescue are caused not in time from sending out
It is raw.2nd, by triggering mode, low-power consumption is solved the problems, such as, whole device can work more than 5 years in battery power supply mode, is adopted
Battery is powered, and solves a difficult problem for difficulty of powering in Highways ', reduces cost.3rd, by radio communication, cable modem is solved
Letter mode needs a difficult problem for independent wiring, reduces cost.
Description of the drawings
Fig. 1 is the electrical schematic diagram of the embodiment 1 provided in technical scheme；
Fig. 2 is the flow chart of the embodiment 2 provided in technical scheme.
Piece mark explanation
1 microcontroller
2 batteries
3 first acceleration transducers
4 second acceleration transducers
5 communication modules
6 Voltage stabilizing modules
7 switch elements
Specific embodiment
Hereinafter embodiments of the present invention are illustrated by particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands easily other advantages and effect of the present invention.
Embodiment 1
As shown in figure 1, the present invention provides a kind of vehicle accident monitoring alarm, including：
First acceleration transducer 3, is arranged on the guardrail of the highway section that need to be monitored, for detecting guardrail in collision
The acceleration of vibration, and obtain the first accekeration；
Second acceleration transducer 4, is arranged on the guardrail of the highway section that need to be monitored, for detecting guardrail in collision
The acceleration of vibration, and obtain the second accekeration；
Microcontroller 1, is connected respectively with the first acceleration transducer 3 and the second acceleration transducer 4, is suitable to be set first
Definite value is set in the first acceleration transducer 3, and starts the second acceleration transducer 4 or by the second acceleration transducer 4
It is standby, and the second setting value is provided with microcontroller 1, and be suitable to second accekeration and the second setting value ratio
Compared with；
Communication module 5, is connected with the microcontroller 1, is suitable to receive the control signal of the microcontroller 1, by micro-control
Device processed 1 starts or closes；
Wherein, first acceleration transducer 3 is suitable to compare the first accekeration with the first setting value, and first
When acceleration transducer 3 judges that the first accekeration is more than the first setting value, the first setting value as triggers threshold value, and first adds
Velocity sensor 3 produces a trigger pulse, wakes up microcontroller 1 and enters working condition, and causes the control of microcontroller 1 second
Acceleration transducer 4 works, and into sampling configuration, that is, starts the second acceleration transducer 4；
When the second accekeration is more than the second setting value, microcontroller 1 judges vehicle accident, starts communication module
5, and control signal is sent to communication module 5, make communication module 5 send warning message；
Power consumption of the power consumption of the first acceleration transducer 3 less than the second acceleration transducer 4.
The microcontroller 1 is further adapted for when the first accekeration is detected, the first acceleration transducer 3 of control works, the
Two acceleration transducers 4 and microcontroller 1 are standby, and control communication module 5 is in power-off closed mode；In second acceleration
When sensor 4 is started working, control the communication module 5 and be in power-off closed mode；After judging to occur vehicle accident, start
Communication module 5, sends warning message；After the warning message sends, the power-off of communication module 5, second acceleration are controlled
Sensor 4 is standby, and the first acceleration transducer 3 works, and the microcontroller 1 is standby.
Also include power supply 2, Voltage stabilizing module 6 and switch element 7, power supply 2 connects microcontroller 1 Jing after Voltage stabilizing module 6, switchs
Unit 7 is connected between communication module 5 and voltage stabilizing chip microcontroller 1, switch element 7 also with microcontroller 1, microcontroller 1
Control signal can be sent to switch element 7, the energization and power-off of communication module 5 is controlled, power supply 2 by lithium battery and complex capacitance simultaneously
Joint group into.Voltage stabilizing module 6 adopts TPS78233 type voltage stabilizing chips, this example breaker in middle unit 7 to select field effect transistor (MOSFET), its
Model CSD25302Q2.
Power consumption of the power consumption of first acceleration transducer 3 less than second acceleration transducer 4.Communicate in this example
Module 5 is GPRS and the antenna being attached thereto and SIM, can be in other embodiments ZIGBEE, WIFI, RF433M etc.
Wireless communication mode, the model of the first acceleration transducer 3 is adopted using ADXL362, the model of the second acceleration transducer 4
ADXL375, microcontroller 1 be single-chip microcomputer (MCU), model EFM32G222FX.
The working method of the vehicle accident monitoring alarm is：First acceleration transducer 3 is constantly in working condition,
The real-time monitoring of first acceleration transducer 3 simultaneously obtains the first accekeration of guardrail, by the first accekeration for obtaining with it is default
The first setting value in the first acceleration transducer 3 compares, and the first setting value is to be set to first by MCU in initialization
Acceleration transducer 3, if the first accekeration is less than the first setting value, the first acceleration transducer 3 proceeds monitoring；
If the first accekeration is more than or equal to the first setting value, the first acceleration transducer 3 produces collision interrupt signal to MCU, MCU inspections
Normal mode of operation is entered from standby mode when measuring collision interrupt number, and starts the second acceleration sensing in holding state
Device 4, carries out the measurement of accekeration, and microcontroller 1 is communicated by spi bus with the second acceleration transducer 4, the second acceleration
The second accekeration for measuring is sent to microcontroller 1 by sensor 4, microcontroller 1 by second accekeration with it is default
Second setting value is compared；If the second accekeration is less than the second setting value, the first acceleration transducer 3 proceeds prison
Survey, do not perform other actions；If second accekeration is more than or equal to the second setting value, it is judged to vehicle accident, microcontroller
Device 1 outputs control signals to switch element 7, makes communication module 5 be powered, that is, start GPRS, SIM, antenna and be powered, and sends and reports to the police
Information, it is standby that warning message sends the power-off of rear communication module 5, the second acceleration transducer 4 and microcontroller 1, carries out next
Secondary monitoring.Wherein the second setting value is the marginal value for determining whether vehicle accident, is drawn by many experiments, the first setting
Value is generally several acceleration of gravitys.
Because existing acceleration transducer, measurement range low in energy consumption are narrower, sample rate is slightly slow, and measurement range width
Power consumption is high, sample rate is fast, general power consumption is that several microamperes of acceleration transducer its detection range is usually within 8g,
Power consumption is within more than 100 microamperes of acceleration transducer its detection range is 200g, and common rail collision accident its acceleration
Spend for a few to tens of microamperes, therefore only with an acceleration transducer can not take into account low-power consumption and compared with Wide measuring range
Require, so the first narrow acceleration transducer 3 of low-power consumption detection range and a detection range width used in the present invention
The second higher acceleration transducer 4 of power consumption, holding state of the microcontroller 1 in low-power consumption, the first acceleration transducer 3 one
Directly it is in opening, the second acceleration transducer 4 is in holding state, communication module 5 is in power-off closed mode, such one
Straight in running order only the first acceleration transducer 3, first acceleration transducer, 3 Trigger Functions trigger micro-control
The acceleration transducer 4 of device processed 1 and second works, and communication module 5 is also to need to trigger ability energization work, so can be dropped significantly
The power consumption of low monitoring device system, the first acceleration transducer 3 is used as collision trigger switch, and the second acceleration transducer 4 is used as
Data sampling, by triggering mode, solves the problems, such as low-power consumption, and whole device can work more than 5 years in battery power supply mode,
Powered using battery, overcome that electric lines of force power supply cost is high, the deficiency that later maintenance is inconvenient and solar powered, solved
Highways ' power difficulty a difficult problem, reduces cost.
Device work is divided into standby mode and alarm mode both of which, and standby mode monitoring collision occurs, alarm mode
Collision warning is processed, because collision is the event of very low probability, the standby mode working time is more than more than 99%, as long as ensureing
The super low-power consumption of standby mode, can just reduce overall power, and whole device can be arranged on guardrail when in use.
Wherein the second acceleration transducer 4 represents that the internal sample circuit of the second acceleration transducer 4 stops in holding state
Only work, but analog circuit keeps power supply, its purpose is to be preferably minimized power consumption, while can when enabling signal is received
Quickly recover to normal operating conditions.
Wherein microcontroller 1 represents that the only a small amount of circuit in the inside of microcontroller 1 (such as interrupts and wakes up electricity in holding state
Road etc.) power supply and normal operating conditions, other most of peripheral module power cutoffs are kept, its objective is to drop to power consumption most
It is low, while normal operating conditions can be quickly recovered to when enabling signal is received.
Be in off-position during 5 normality of communication module, consumption electric energy that can be minimum, carry out signal transmitting do not carry out plus
Velocity measuring is urgent, therefore the startup that can just be powered after triggering below, and postponing transmitting in several seconds affects little, and the second acceleration
Sensor 4 is in holding state, rather than off-position is because after the first acceleration transducer 3 is triggered, and needs wake-up the
Two acceleration transducers 4 immediately enter mode of operation, in case time delay causes measurement inaccurate.
The first acceleration transducer 3 is capacitance acceleration transducer of the detection range less than 8g described in this example, described
Second acceleration transducer 4 is capacitance acceleration transducer of the detection range within 200g, wherein as trigger switch
First acceleration transducer 3, it would however also be possible to employ vibrating sensor etc..Its collision is judged by the way of measurement guardrail acceleration
Situation, it is also possible to realized by way of displacement, simply the equipment of displacement measurement costly, and there is presently no energy
Enough elements to measure.
Embodiment 2
As shown in Fig. 2 the present invention also provides a kind of vehicle accident alarming method by monitoring, comprise the following steps：
Step one：The acceleration of guardrail is obtained in real time using the first acceleration detection pattern, and obtains the first accekeration；
Step 2：The first accekeration obtained in step one is compared with default first setting value；This first
Setting value is 6g, if the first accekeration is more than or equal to the first setting value, into step 3, if the first accekeration is less than the
One setting value, then return to step one；
Step 3：Using the acceleration of the second acceleration detection pattern acquiring guardrail, and obtain the second accekeration；
Step 4：Second accekeration is compared with default second setting value；Second setting value in this example
For 25g, if second accekeration is more than or equal to the second setting value, it is judged to vehicle accident, into step 5, if second
Accekeration is less than the second setting value, then return to step one；
Step 5：Vehicle accident signal is sent, rail collision signal stops the second acceleration detection pattern after sending
Vehicle accident signal is sent with stopping, step one is then back to, proceeds monitoring；
Wherein, carried out using the first acceleration transducer in the first acceleration detection pattern, second acceleration
Carried out using the second acceleration transducer in detection pattern, and the power consumption of first acceleration transducer adds less than described second
The power consumption of velocity sensor.
The accekeration detection range of the first acceleration detection pattern is less than or equal to 8g, the second acceleration detection mould in this example
The accekeration detection range of formula is less than or equal to 200g, naturally it is also possible to expand higher detection range to, and general power consumption is several
The acceleration transducer of individual microampere its detection range is usually within 8g, and power consumption is in its inspection of more than 100 microamperes of acceleration transducer
It is that the bigger usual power consumption of detection range is higher, therefore can make the low work(of the first acceleration detection pattern within 200g to survey scope
Work consuming is made.
Carry out step for the moment, worked always using the low-power consumption of the first acceleration detection pattern, and stop described second and add
The big power consumption of velocity measuring pattern and transmission vehicle accident signal.
G in 6g represents acceleration of gravity, and 6g represents 6 times of gravity acceleration values, and the first setting value is 6g, the second setting value
It is the result drawn according to substantial amounts of sampling experimental for 25g, different sensors may have fluctuation in this value, but
Its detection method is identical.
Second acceleration detection pattern is at least 1 second to the continuous sampling time that the acceleration of guardrail is measured, this
Example is preferably 1 second, by being analyzed to 1 second sampled data, if at least continuous more than 10 milliseconds of the second acceleration
Angle value is more than the second setting value, then be judged to there occurs vehicle accident.Above-mentioned measurement process is needed to the acceleration in a period of time
Angle value is continuously measured, and is judged by continuous acceleration parameter and is compared, rather than only tests a time point
Value, it is to avoid transient pulse it is too high and affect measurement result, cause erroneous judgement.
In step 5, send and waited for a period of time after vehicle accident signal, stop the second acceleration detection pattern and
Stop sending vehicle accident signal.
Wait for a period of time to ensure sending for vehicle accident signal, stop the second acceleration detection pattern and stopping
Vehicle accident signal is sent, power consumption can be reduced so as under being operated in the low power consumpting state of the first acceleration detection pattern.
As described above, the invention has the beneficial effects as follows：1st, vibration, the position of guardrail when colliding are monitored using acceleration transducer
The damaged condition of the features such as shifting, indirect monitoring vehicle accident collision severity and guardrail.By the apparatus and method energy and
When principium identification is carried out to vehicle accident and to Surveillance center warning message is sent simultaneously, so that relevant departments are located in time
Reason and rescue, so as to avoid the accident because can not in time find the people life property loss that accident and rescue are caused not in time from sending out
It is raw.2nd, by triggering mode, low-power consumption is solved the problems, such as, whole device can work more than 5 years in battery power supply mode, can be with
Extend battery life, powered using battery, solve a difficult problem for difficulty of powering in Highways ', reduces cost.3rd, by wireless
Communication, solving wired communication mode needs a difficult problem for independent wiring, reduces cost.
The principle and its effect of above-described embodiment only illustrative present invention, it is any ripe not for the present invention is limited
Know the personage of this technology all can carry out modifications and changes under the spirit and the scope without prejudice to the present invention to above-described embodiment.Cause
This, such as those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (8)
1. a kind of vehicle accident monitoring alarm, it is characterised in that include：
First acceleration transducer, is arranged on the guardrail of the highway section that need to be monitored, for detecting that guardrail vibrates in collision
Acceleration, and obtain the first accekeration；
Second acceleration transducer, is arranged on the guardrail of the highway section that need to be monitored, for detecting that guardrail vibrates in collision
Acceleration, and obtain the second accekeration；
Microcontroller, is connected respectively with first acceleration transducer and the second acceleration transducer, is suitable to the first setting
Value is set in the first acceleration transducer, and starts second acceleration transducer or by second acceleration sensing
Device is standby, and the second setting value is provided with the microcontroller, and is suitable to second accekeration and the described second setting
Value compares；
Communication module, is connected with the microcontroller, is suitable to receive the control signal of the microcontroller, is started by microcontroller
Or close；
Wherein, first acceleration transducer is suitable to compare the first accekeration with first setting value, and first
When accekeration is more than first setting value, triggers the microcontroller and enter working condition, and cause the microcontroller
Start the second acceleration transducer；
When the second accekeration is more than second setting value, the microcontroller judges vehicle accident, starts communication
Module, and control signal is sent to communication module, make the communication module send warning message；
Power consumption of the power consumption of first acceleration transducer less than second acceleration transducer；
The microcontroller is further adapted for when the first accekeration is detected, controls second acceleration transducer and microcontroller
It is standby, control the communication module and be in power-off closed mode；When second acceleration transducer is started working, institute is controlled
Communication module is stated in power-off closed mode；After the warning message sends, the control communication module power-off, described second
Acceleration transducer is standby, the work of the first acceleration transducer, and the microcontroller is standby.
2. vehicle accident monitoring alarm according to claim 1, it is characterised in that：Also include power supply, Voltage stabilizing module
And switch element, the power supply Jing Voltage stabilizing modules are connected with the microcontroller, the switch element be connected to the power supply with
Between the communication module, the switch element is also connected with the microcontroller.
3. vehicle accident monitoring alarm according to claim 2, it is characterised in that：The power supply is by lithium battery and again
Close electric capacity to compose in parallel, the communication module is ZIGBEE, WIFI, RF433 or GPRS module.
4. the vehicle accident monitoring that a kind of vehicle accident monitoring alarm based on described in any one of claims 1 to 3 is realized
Alarm method, it is characterised in that comprise the following steps：
Step one：The acceleration of guardrail vibration is obtained in real time using the first acceleration detection pattern, and obtains the first accekeration；
Step 2：The first accekeration obtained in step one is compared with default first setting value；If first accelerates
Angle value is more than or equal to the first setting value, then into step 3, if the first accekeration is less than the first setting value, return to step
One；
Step 3：The acceleration vibrated using the second acceleration detection pattern acquiring guardrail, and obtain the second accekeration；
Step 4：Second accekeration is compared with default second setting value；If second accekeration is big
In equal to the second setting value, then it is judged to vehicle accident, into step 5, if the second accekeration is less than the second setting value,
Return to step one；
Step 5：Vehicle accident signal is sent, vehicle accident signal stops the second acceleration detection pattern and stops after sending
Only send vehicle accident signal；
Wherein, carried out using the first acceleration transducer in the first acceleration detection pattern, second acceleration detection
Carried out using the second acceleration transducer in pattern, and the power consumption of first acceleration transducer is less than second acceleration
The power consumption of sensor；The microcontroller is further adapted for when the first accekeration is detected, controls second acceleration transducer
It is standby with microcontroller, control the communication module and be in power-off closed mode；Start work in second acceleration transducer
When making, control the communication module and be in power-off closed mode；After the warning message sends, control the communication module and break
Electricity, second acceleration transducer is standby, the work of the first acceleration transducer, and the microcontroller is standby.
5. vehicle accident alarming method by monitoring according to claim 4, it is characterised in that：Carry out step for the moment, stop institute
State the second acceleration detection pattern and stop sending vehicle accident signal.
6. vehicle accident alarming method by monitoring according to claim 4, it is characterised in that：In the step 3, second adds
Velocity sensor is at least 1 second to the continuous sampling time that the acceleration that guardrail vibrates is measured.
7. vehicle accident alarming method by monitoring according to claim 4, it is characterised in that：In the step 4, at least connect
The second continuous 10 milliseconds accekeration is more than the second setting value, then be judged to there occurs vehicle accident.
8. vehicle accident alarming method by monitoring according to claim 4, it is characterised in that：Second setting value is more than institute
The first setting value is stated, the first setting value is 6g, and second setting value is 25g.
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| CN106292991A (en) * | 2015-06-01 | 2017-01-04 | 中兴通讯股份有限公司 | A kind of method and device reducing terminal unit power consumption |
| CN105862626A (en) * | 2016-05-31 | 2016-08-17 | 上海市政工程设计研究总院（集团）有限公司 | Steel barrier adopting adjoined distribution type optical fiber sensing technique and use method of steel barrier |
| CN106740631B (en) * | 2017-01-12 | 2019-04-19 | 深圳市元征科技股份有限公司 | Vehicle collision detection method and device based on acceleration transducer |
| CN107945508A (en) * | 2017-11-02 | 2018-04-20 | 深圳佳比泰智能照明股份有限公司 | The monitoring method and system of a kind of highway |
| CN107911479A (en) * | 2017-12-07 | 2018-04-13 | 江西省交通运输科学研究院有限公司 | A kind of traffic safety facilities condition checkout gear and its detection method |
| CN109068291A (en) * | 2018-07-21 | 2018-12-21 | 芜湖英特杰智能科技有限公司 | A kind of emergency method of the vehicle traffic accident emergency system based on Zigbee module |
| CN108717787A (en) * | 2018-07-21 | 2018-10-30 | 芜湖英特杰智能科技有限公司 | A kind of vehicle traffic accident emergency system based on Zigbee module |
| DE102020106237B4 (en) | 2020-03-09 | 2022-05-12 | Audi Aktiengesellschaft | Accidental damage detection system with low-energy real-time signal processing |
| CN112710866A (en) * | 2020-12-15 | 2021-04-27 | 神华铁路装备有限责任公司 | Swing bolster acceleration monitoring device and system and 25t axle weight aluminum alloy coal hopper car |
| CN112572489A (en) * | 2020-12-15 | 2021-03-30 | 神华铁路装备有限责任公司 | Vehicle body acceleration monitoring device and system and 25t axle load aluminum alloy coal hopper car |
| CN112697271A (en) * | 2020-12-15 | 2021-04-23 | 神华铁路装备有限责任公司 | Vehicle vibration monitoring equipment, method and system and railway wagon |
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