CN104134311A - Traffic accident monitoring alarm device and method - Google Patents
Traffic accident monitoring alarm device and method Download PDFInfo
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- CN104134311A CN104134311A CN201410369805.3A CN201410369805A CN104134311A CN 104134311 A CN104134311 A CN 104134311A CN 201410369805 A CN201410369805 A CN 201410369805A CN 104134311 A CN104134311 A CN 104134311A
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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, particularly a kind of traffic hazard monitoring alarm and alarm method thereof.
Background technology
Continuous 10 years rank the first in the world of China's road fatalities, on average every day, death toll approximately had 300 people, and fatal rate reaches 17%, exceeds nearly 9 times than 2% of developed country.After traffic hazard occurs, particularly remote mountain areas and the province meagrely-populated place of national highway, common guardrail does not have to clash into and detects and warning function, and in the time that guardrail is clashed into, staff is difficult to obtain in time message.Owing to can not finding in time traffic hazard, report to the police in time, rescue in time, traffic accident fatal rate is higher, and what statistics showed that rescue personnel arrived in 60 minutes only has 14.3%, approximately has 60% to die from and wait for rescue on the way.Collision guardrail accident tends to cause traffic hazard, after highway protecting plate collision accident occurs, especially meets when secondary traffic hazard occurs and tends to cause traffic congestion, and generally traffic control personnel can only passively obtain the warning message of accident.Cause accident treatment personnel cannot arrive at rapidly before scene cannot not arrived at yet and in incident area, take to warn the safety-conscious way of other traffic participants.
At present, on expressway, conventionally adopt video monitoring monitoring traffic hazard, but because cost is high, be difficult to realize system-wide section and cover.Therefore need to design a kind of traffic hazard monitoring alarm, realizing system-wide section with rational cost covers, the order of severity that judgement has an accident, realize remote monitoring traffic hazard (particularly remote mountain areas and province's national highway), so that relevant department makes a response in time, thereby arrive accident spot fast and accurately, prevent that second accident from occurring, realization and alarm, rescue in time, reduce traffic hazard fatal rate object.
Owing to adopting wired power supply that a large amount of cables need to be installed at Highways ', cost is too high, inconvenient later maintenance.Because highway dust is large, solar panel surface can cover upper thick dust, cause solar panels Efficiency Decreasing, so require often to carry out clean and maintenance, cause maintenance cost too high, solar powered mode is also not too applicable, therefore needs to select the one monitoring device easily of powering, in order to make power supply have the long electric life that supplies, needing monitoring device is low-power consumption simultaneously.
Summary of the invention
The deficiencies in the prior art in view of the above, the object of the present invention is to provide a kind of traffic hazard monitoring alarm and alarm method thereof, can carry out Real-Time Monitoring, also send alerting signal to Surveillance center in time rail collision, realize the low-power consumption of whole observation process simultaneously.
For achieving the above object and other relevant objects, the invention provides a kind of traffic hazard monitoring alarm, comprising:
The first acceleration transducer, is arranged on the guardrail of the highway section that needs monitoring, for monitoring the acceleration of guardrail vibration in the time colliding, and obtains the first accekeration;
The second acceleration transducer, is arranged on the guardrail of the highway section that needs monitoring, for monitoring the acceleration of guardrail vibration in the time colliding, and obtains the second accekeration;
Microcontroller, be connected with described the first acceleration transducer and the second acceleration transducer respectively, be suitable for the first setting value to be set in the first acceleration transducer, and start described the second acceleration transducer or by described the second acceleration transducer standby, and in described microcontroller, be provided with the second setting value, and be suitable for described the second accekeration and described the second setting value comparison;
Communication module, is connected with described microcontroller, is suitable for accepting the control signal of described microcontroller, is started or close by microcontroller;
Wherein, described the first acceleration transducer is suitable for the first accekeration and described the first setting value comparison, and in the time that the first accekeration is greater than described the first setting value, triggers described microcontroller and enter duty, and make described microcontroller start the second acceleration transducer; The first setting value is trigger gate limit value, and the first acceleration transducer produces a trigger pulse, wakes microcontroller up and enters duty, and microprocessor controls the second acceleration transducer work, enters sampling pattern, starts the second acceleration transducer;
In the time that the second accekeration is greater than described the second setting value, there is traffic hazard in described microcontroller judgement, starts communication module, and send control signal to communication module, makes described communication module send warning message;
The power consumption of described the first acceleration transducer is less than the power consumption of described the second acceleration transducer.
Due to existing acceleration transducer, measurement range low in energy consumption is narrower, sample rate is slightly slow, and the wide power consumption of measurement range is high, it is fast that sample rate is wanted, its sensing range of acceleration transducer that general power consumption is several microamperes is generally in 8g, power consumption is in 200g its sensing range of acceleration transducer of more than 100 microamperes, and common its acceleration of rail collision accident be a few to tens of microamperes not etc., therefore only can not take into account low-power consumption with an acceleration transducer and compared with the requirement of Wide measuring range, so use the first acceleration transducer and second acceleration transducer that the wide power consumption of sensing range is higher that low-power consumption sensing range is narrow in the present invention, the holding state of microcontroller in low-power consumption, the first acceleration transducer is always in opening, the second acceleration transducer is in holding state, communication module is in power-off closed condition, so always in running order only have the first acceleration transducer, this first acceleration transducer plays Trigger Function, the work of triggering microcontroller, microprocessor controls the second acceleration transducer work or standby, communication module is also to need to trigger the work of just switching on, so can greatly reduce the power consumption of monitoring device system, device work is divided into standby mode and two kinds of patterns of alarm mode, standby mode monitoring collision occurs, alarm mode is processed collision warning, because collision is the event of very low probability, the standby mode working time exceedes more than 99%, as long as ensure the super low-power consumption of standby mode, just can reduce overall power, whole device can be arranged on guardrail in use.
As preferably: described microcontroller is also suitable for, in the time detecting the first accekeration, controlling described the second acceleration transducer and microcontroller standby, controls described communication module in power-off closed condition; In the time that described the second acceleration transducer is started working, control described communication module in power-off closed condition; After described warning message sends, control described communication module power-off, described the second acceleration transducer standby, the first acceleration transducer work, and described microcontroller standby.
When communication module normality in off-position, consumption electric energy that can be minimum, carrying out signal transmitting, not carry out acceleration detection urgent, therefore after can triggering in the back, just energising starts, and postpone transmitting impact in several seconds little, and the second acceleration transducer is in holding state, instead of off-position, because after the first acceleration transducer triggers, need to wake the second acceleration transducer up by microcontroller and enter immediately mode of operation, in order to avoid time delay causes measurement inaccurate.
As preferably: described the first acceleration transducer and the second acceleration transducer are capacitance acceleration transducer.Described the first acceleration transducer can replace with vibration transducer, adopts the mode of measuring guardrail acceleration to judge its collision situation, also can realize by the mode of displacement.
As preferably: also comprise power supply, Voltage stabilizing module and switch element, described power supply is connected with described microcontroller through Voltage stabilizing module, and described switch element is connected between described power supply and described communication module, and described switch element is also connected with described microcontroller.Microcontroller sends and controls signal to switch element, controls energising and the power-off of communication module, and switch element can adopt field effect transistor.
By triggering mode, solve low-power consumption problem, whole device can be worked more than 5 years in powered battery mode, adopt powered battery, overcome the deficiency that line of electric force power supply cost is high, later maintenance is inconvenient and solar powered, solved in the Highways ' difficult difficult problem of powering, reduced costs.
As preferably: described power supply is composed in parallel by lithium battery and complex capacitance, and described communication module is ZIGBEE, WIFI, RF433M or GPRS module, adopt radio communication.
The present invention also provides a kind of traffic hazard alarming method by monitoring, comprises the following steps:
Step 1: adopt the acceleration of the first acceleration detection pattern Real-time Obtaining guardrail vibration, and obtain the first accekeration;
Step 2: the first accekeration obtaining in step 1 and the first default setting value are compared; If the first accekeration is more than or equal to the first setting value, enter step 3, if the first accekeration is less than the first setting value, return to step 1;
Step 3: the second acceleration detection pattern of employing is obtained the acceleration of guardrail vibration, and obtains the second accekeration;
Step 4: described the second accekeration and the second default setting value are compared; If described the second accekeration is more than or equal to the second setting value, be judged to be traffic hazard, enter step 5, if the second accekeration is less than the second setting value, return to step 1;
Step 5: send traffic hazard signal, stop described the second acceleration detection pattern after rail collision signal sends and stop sending traffic hazard signal;
Wherein, in described the first acceleration detection pattern, adopt the first acceleration transducer to carry out, in described the second acceleration detection pattern, adopt the second acceleration transducer to carry out, and the power consumption of described the first acceleration transducer is less than the power consumption of described the second acceleration transducer.
As preferably: while carrying out step 1, stop described the second acceleration detection pattern and stop sending traffic hazard signal.
As preferably: in described step 2, the first setting value is 6g.
G in 6g represents acceleration of gravity, and 6g represents 6 times of gravity acceleration value.
As preferably: in described step 3, the continuous sampling time that the second acceleration transducer is measured the acceleration of guardrail vibration was at least for 1 second.
As preferably: in described step 4, second accekeration of at least continuous 10 milliseconds is greater than the second setting value, is judged to be to have occurred traffic hazard.
Above-mentioned measuring process need to be carried out continuous coverage to the accekeration in a period of time, is judged and is compared, instead of only test the value of a time point by continuous acceleration parameter, avoids instantaneous value to affect measurement result.
In described step 5, after transmission traffic hazard signal, wait for a period of time, stop described the second acceleration detection pattern and stop sending traffic hazard signal.
Wait for a period of time to ensure sending of traffic hazard signal, stop described the second acceleration detection pattern and stop sending traffic hazard signal, can reduce power consumption, make under its low power consumpting state that is operated in the first acceleration detection pattern.
As preferably: described the second setting value is greater than described the first setting value, and described the second setting value is 25g.
The first setting value is 6g, and the second setting value is that 25g is the result drawing according to a large amount of sampling experimentals, and different sensors may have fluctuation in this value, but its detection method is identical.
Its sensing range of acceleration transducer that general power consumption is several microamperes is generally in 8g, and power consumption is in 200g its sensing range of acceleration transducer of more than 100 microamperes, therefore can make the first acceleration detection pattern low-power consumption work.
As mentioned above, the invention has the beneficial effects as follows: the feature such as vibration, displacement of guardrail while 1, utilizing acceleration transducer monitoring collision, the damaged condition of fierce degree and guardrail is collided in indirect monitoring traffic hazard.Can carry out principium identification and send warning message to Surveillance center simultaneously traffic hazard timely by these apparatus and method, so that relevant departments process in time and rescue, thereby avoid the people life property loss's who causes not in time because of discovery accident in time and rescue accident to occur.2, by triggering mode, solve low-power consumption problem, whole device can be worked more than 5 years in powered battery mode, adopts powered battery, has solved in the Highways ' difficult difficult problem of powering, and reduces costs.3, by radio communication, solve the difficult problem that wire communication mode needs independent wiring, reduce costs.
Brief description of the drawings
The electrical schematic diagram that Fig. 1 is the embodiment 1 that provides in technical scheme of the present invention;
The process flow diagram that Fig. 2 is the embodiment 2 that provides in technical scheme of the present invention.
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
Embodiment
By particular specific embodiment explanation embodiments of the present invention, person skilled in the art scholar can understand other advantages of the present invention and effect easily by the disclosed content of this instructions below.
Embodiment 1
As shown in Figure 1, the invention provides a kind of traffic hazard monitoring alarm, comprising:
The first acceleration transducer 3, is arranged on the guardrail of the highway section that needs monitoring, for detection of the acceleration of guardrail vibration in the time colliding, and obtains the first accekeration;
The second acceleration transducer 4, is arranged on the guardrail of the highway section that needs monitoring, for detection of the acceleration of guardrail vibration in the time colliding, and obtains the second accekeration;
Microcontroller 1, be connected with the first acceleration transducer 3 and the second acceleration transducer 4 respectively, be suitable for the first setting value to be set in the first acceleration transducer 3, and start the second acceleration transducer 4 or by the second acceleration transducer 4 standbies, and in microcontroller 1, be provided with the second setting value, and be suitable for described the second accekeration and described the second setting value comparison;
Communication module 5, is connected with described microcontroller 1, is suitable for accepting the control signal of described microcontroller 1, is started or closes by microcontroller 1;
Wherein, described the first acceleration transducer 3 is suitable for the first accekeration and the first setting value comparison, and in the time that the first acceleration transducer 3 judges that the first accekeration is greater than the first setting value, the first setting value is trigger gate limit value, the first acceleration transducer 3 produces a trigger pulse, wakes microcontroller 1 up and enters duty, and make microcontroller 1 control the second acceleration transducer 4 to work, enter sampling pattern, start the second acceleration transducer 4;
In the time that the second accekeration is greater than the second setting value, there is traffic hazard in microcontroller 1 judgement, starts communication module 5, and send control signal to communication module 5, makes communication module 5 send warning message;
The power consumption of the first acceleration transducer 3 is less than the power consumption of the second acceleration transducer 4.
Described microcontroller 1 is also suitable in the time detecting the first accekeration, controls the first acceleration transducer 3 and works, and the second acceleration transducer 4 and microcontroller 1 standby, control communication module 5 in power-off closed condition; In the time that described the second acceleration transducer 4 is started working, control described communication module 5 in power-off closed condition; When judgement occurs, after traffic hazard, to start communication module 5, send warning message; After described warning message sends, control communication module 5 power-off, described the second acceleration transducer 4 standbies, the first acceleration transducer 3 is worked, and 1 standby of described microcontroller.
Also comprise power supply 2, Voltage stabilizing module 6 and switch element 7, power supply 2 connects microcontroller 1 after Voltage stabilizing module 6, switch element 7 is connected between communication module 5 and voltage stabilizing chip microcontroller 1, switch element 7 also with microcontroller 1, microcontroller 1 can send and control signal to switch element 7, controls energising and the power-off of communication module 5, and power supply 2 is composed in parallel by lithium battery and complex capacitance.Voltage stabilizing module 6 adopts TPS78233 type voltage stabilizing chip, and in this example, switch element 7 is selected field effect transistor (MOSFET), and its model is CSD25302Q2.
The power consumption of described the first acceleration transducer 3 is less than the power consumption of described the second acceleration transducer 4.In this example, communication module 5 is GPRS and the antenna being attached thereto and SIM card, can be the wireless communication modes such as ZIGBEE, WIFI, RF433M in other embodiments, the first acceleration transducer 3 models adopt ADXL362, the second acceleration transducer 4 models to adopt ADXL375, microcontroller 1 is single-chip microcomputer (MCU), and model is EFM32G222FX.
The working method of this traffic hazard monitoring alarm is: the first acceleration transducer 3 is always in running order, the first acceleration transducer 3 Real-Time Monitorings also obtain the first accekeration of guardrail, by the first accekeration obtaining be preset in the first setting value comparison in the first acceleration transducer 3, the first setting value is set to the first acceleration transducer 3 by MCU in the time of initialization, if the first accekeration is less than the first setting value, the first acceleration transducer 3 is proceeded monitoring; If the first accekeration is more than or equal to the first setting value, the first acceleration transducer 3 produces collision look-at-me to MCU, MCU enters normal mode of operation from standby mode when collision interrupt number detected, and second acceleration transducer 4 of startup in holding state, carry out the measurement of accekeration, microcontroller 1 is communicated by letter with the second acceleration transducer 4 by spi bus, the second accekeration recording is sent to microcontroller 1 by the second acceleration transducer 4, and microcontroller 1 compares this second accekeration and the second default setting value; If the second accekeration is less than the second setting value, the first acceleration transducer 3 is proceeded monitoring, does not carry out other actions; If this second accekeration is more than or equal to the second setting value, be judged to be traffic hazard, microcontroller 1 outputs control signals to switch element 7, communication module 5 is switched on, start GPRS, SIM card, antenna energising, send warning message, warning message sends rear communication module 5 power-off, the second acceleration transducer 4 and the equal standby of microcontroller 1, carries out monitoring next time.Wherein the second setting value is to determine whether it is the critical value of traffic hazard, is drawn by many experiments, and the first setting value is generally several acceleration of gravity.
Due to existing acceleration transducer, measurement range low in energy consumption is narrower, sample rate is slightly slow, and the wide power consumption of measurement range is high, it is fast that sample rate is wanted, its sensing range of acceleration transducer that general power consumption is several microamperes is generally in 8g, power consumption is in 200g its sensing range of acceleration transducer of more than 100 microamperes, and common its acceleration of rail collision accident be a few to tens of microamperes not etc., therefore only can not take into account low-power consumption with an acceleration transducer and compared with the requirement of Wide measuring range, so use the first acceleration transducer 3 and second acceleration transducer 4 that the wide power consumption of sensing range is higher that low-power consumption sensing range is narrow in the present invention, the holding state of microcontroller 1 in low-power consumption, the first acceleration transducer 3 is always in opening, the second acceleration transducer 4 is in holding state, communication module 5 is in power-off closed condition, so always in running order only have the first acceleration transducer 3, 3 Trigger Functions of this first acceleration transducer, triggering microcontroller 1 and the second acceleration transducer 4 works, communication module 5 is also to need to trigger the work of just switching on, so can greatly reduce the power consumption of monitoring device system, the first acceleration transducer 3 is as collision trigger switch, the second acceleration transducer 4 is as data sampling, pass through triggering mode, solve low-power consumption problem, whole device can be worked more than 5 years in powered battery mode, adopt powered battery, overcome line of electric force power supply cost high, later maintenance inconvenience and solar powered deficiency, solve in the Highways ' difficult difficult problem of powering, reduce costs.
Device work is divided into standby mode and two kinds of patterns of alarm mode, standby mode monitoring collision occurs, alarm mode is processed collision warning, because collision is the event of very low probability, the standby mode working time exceedes more than 99%, as long as ensure the super low-power consumption of standby mode, just can reduce overall power, whole device can be arranged on guardrail in use.
Wherein the second acceleration transducer 4 represents that in holding state the inner sample circuit of the second acceleration transducer 4 quits work, but mimic channel keeps power supply, its objective is for power consumption is dropped to minimumly, simultaneously in the time receiving enabling signal, can quickly recover to normal operating conditions.
Wherein microcontroller 1 represents that in holding state microcontroller 1 inside only has a small amount of circuit (such as interrupting wake-up circuit etc.) to keep power supply and normal operating conditions, other most of peripheral module power cutoff, its objective is power consumption to be dropped to minimum, simultaneously in the time receiving enabling signal, can quickly recover to normal operating conditions.
When communication module 5 normality in off-position, consumption electric energy that can be minimum, carrying out signal transmitting, not carry out acceleration detection urgent, therefore after can triggering in the back, just energising starts, and postpone transmitting impact in several seconds little, and the second acceleration transducer 4 is in holding state, instead of off-position, because after the first acceleration transducer 3 triggers, need to wake the second acceleration transducer 4 up and enter immediately mode of operation, in order to avoid time delay causes measurement inaccurate.
The first acceleration transducer 3 described in this example is less than the capacitance acceleration transducer of 8g for sensing range, described the second acceleration transducer 4 is the capacitance acceleration transducer of sensing range in 200g, wherein, as the first acceleration transducer 3 of trigger switch, also can adopt vibration transducer etc.Adopt the mode of measuring guardrail acceleration to judge its collision situation, also can realize by the mode of displacement, the just comparison in equipment costliness of displacement measurement, and the current element that also there is no the measurement of can being used for.
Embodiment 2
As shown in Figure 2, the present invention also provides a kind of traffic hazard alarming method by monitoring, comprises the following steps:
Step 1: adopt the acceleration of the first acceleration detection pattern Real-time Obtaining guardrail, and obtain the first accekeration;
Step 2: the first accekeration obtaining in step 1 and the first default setting value are compared; This first setting value is 6g, if the first accekeration is more than or equal to the first setting value, enters step 3, if the first accekeration is less than the first setting value, returns to step 1;
Step 3: the second acceleration detection pattern of employing is obtained the acceleration of guardrail, and obtains the second accekeration;
Step 4: described the second accekeration and the second default setting value are compared; In this example, the second setting value is 25g, if described the second accekeration is more than or equal to the second setting value, is judged to be traffic hazard, enters step 5, if the second accekeration is less than the second setting value, returns to step 1;
Step 5: send traffic hazard signal, stop described the second acceleration detection pattern after rail collision signal sends and stop sending traffic hazard signal, then return to step 1, proceed monitoring;
Wherein, in described the first acceleration detection pattern, adopt the first acceleration transducer to carry out, in described the second acceleration detection pattern, adopt the second acceleration transducer to carry out, and the power consumption of described the first acceleration transducer is less than the power consumption of described the second acceleration transducer.
The accekeration sensing range of the first acceleration detection pattern is less than or equal to 8g, in this example, the accekeration sensing range of the second acceleration detection pattern is less than or equal to 200g, can certainly expand higher sensing range to, its sensing range of acceleration transducer that general power consumption is several microamperes is generally in 8g, power consumption is in 200g its sensing range of acceleration transducer of more than 100 microamperes, the common power consumption that sensing range is larger is higher, therefore can make the first acceleration detection pattern low-power consumption work.
While carrying out step 1, utilize the low-power consumption of the first acceleration detection pattern to work always, and stop the large power consumption of described the second acceleration detection pattern and transmission traffic hazard signal.
G in 6g represents acceleration of gravity, 6g represents 6 times of gravity acceleration value, and the first setting value is 6g, and the second setting value is that 25g is the result drawing according to a large amount of sampling experimentals, different sensors may have fluctuation in this value, but its detection method is identical.
The continuous sampling time that the second acceleration detection pattern is measured the acceleration of guardrail was at least for 1 second, this example was preferably for 1 second, by to 1 second sampled data analyze, if have at least continuous 10 milliseconds of second above accekerations to be greater than the second setting value, be judged to be to have occurred traffic hazard.Above-mentioned measuring process need to be carried out continuous coverage to the accekeration in a period of time, is judged and is compared, instead of only test the value of a time point by continuous acceleration parameter, avoids transient pulse too high and affect measurement result, causes erroneous judgement.
In step 5, after transmission traffic hazard signal, wait for a period of time, stop described the second acceleration detection pattern and stop sending traffic hazard signal.
Wait for a period of time to ensure sending of traffic hazard signal, stop described the second acceleration detection pattern and stop sending traffic hazard signal, can reduce power consumption, make under its low power consumpting state that is operated in the first acceleration detection pattern.
As mentioned above, the invention has the beneficial effects as follows: the feature such as vibration, displacement of guardrail while 1, utilizing acceleration transducer monitoring collision, the damaged condition of fierce degree and guardrail is collided in indirect monitoring traffic hazard.Can carry out principium identification and send warning message to Surveillance center simultaneously traffic hazard timely by these apparatus and method, so that relevant departments process in time and rescue, thereby avoid the people life property loss's who causes not in time because of discovery accident in time and rescue accident to occur.2, by triggering mode, solve low-power consumption problem, whole device can be worked more than 5 years in powered battery mode, can extending battery life, adopt powered battery, solve in the Highways ' difficult difficult problem of powering, reduce costs.3, by radio communication, solve the difficult problem that wire communication mode needs independent wiring, reduce costs.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention, any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (9)
1. a traffic hazard monitoring alarm, is characterized in that, comprising:
The first acceleration transducer, is arranged on the guardrail of the highway section that needs monitoring, for detection of the acceleration of guardrail vibration in the time colliding, and obtains the first accekeration;
The second acceleration transducer, is arranged on the guardrail of the highway section that needs monitoring, for detection of the acceleration of guardrail vibration in the time colliding, and obtains the second accekeration;
Microcontroller, be connected with described the first acceleration transducer and the second acceleration transducer respectively, be suitable for the first setting value to be set in the first acceleration transducer, and start described the second acceleration transducer or by described the second acceleration transducer standby, and in described microcontroller, be provided with the second setting value, and be suitable for described the second accekeration and described the second setting value comparison;
Communication module, is connected with described microcontroller, is suitable for accepting the control signal of described microcontroller, is started or close by microcontroller;
Wherein, described the first acceleration transducer is suitable for the first accekeration and described the first setting value comparison, and in the time that the first accekeration is greater than described the first setting value, triggers described microcontroller and enter duty, and make described microcontroller start the second acceleration transducer;
In the time that the second accekeration is greater than described the second setting value, there is traffic hazard in described microcontroller judgement, starts communication module, and send control signal to communication module, makes described communication module send warning message;
The power consumption of described the first acceleration transducer is less than the power consumption of described the second acceleration transducer.
2. traffic hazard monitoring alarm according to claim 1, it is characterized in that: described microcontroller is also suitable in the time detecting the first accekeration, control described the second acceleration transducer and microcontroller standby, control described communication module in power-off closed condition; In the time that described the second acceleration transducer is started working, control described communication module in power-off closed condition; After described warning message sends, control described communication module power-off, described the second acceleration transducer standby, the first acceleration transducer work, and described microcontroller standby.
3. traffic hazard monitoring alarm according to claim 1 and 2, it is characterized in that: also comprise power supply, Voltage stabilizing module and switch element, described power supply is connected with described microcontroller through Voltage stabilizing module, described switch element is connected between described power supply and described communication module, and described switch element is also connected with described microcontroller.
4. traffic hazard monitoring alarm according to claim 3, is characterized in that: described power supply is composed in parallel by lithium battery and complex capacitance, and described communication module is ZIGBEE, WIFI, RF433 or GPRS module.
5. a traffic hazard alarming method by monitoring, is characterized in that, comprises the following steps:
Step 1: adopt the acceleration of the first acceleration detection pattern Real-time Obtaining guardrail vibration, and obtain the first accekeration;
Step 2: the first accekeration obtaining in step 1 and the first default setting value are compared; If the first accekeration is more than or equal to the first setting value, enter step 3, if the first accekeration is less than the first setting value, return to step 1;
Step 3: the second acceleration detection pattern of employing is obtained the acceleration of guardrail vibration, and obtains the second accekeration;
Step 4: described the second accekeration and the second default setting value are compared; If described the second accekeration is more than or equal to the second setting value, be judged to be traffic hazard, enter step 5, if the second accekeration is less than the second setting value, return to step 1;
Step 5: send traffic hazard signal, stop described the second acceleration detection pattern after traffic hazard signal sends and stop sending traffic hazard signal;
Wherein, in described the first acceleration detection pattern, adopt the first acceleration transducer to carry out, in described the second acceleration detection pattern, adopt the second acceleration transducer to carry out, and the power consumption of described the first acceleration transducer is less than the power consumption of described the second acceleration transducer.
6. traffic hazard alarming method by monitoring according to claim 5, is characterized in that: while carrying out step 1, stop described the second acceleration detection pattern and stop sending traffic hazard signal.
7. traffic hazard alarming method by monitoring according to claim 5, is characterized in that: in described step 3, the continuous sampling time that the second acceleration transducer is measured the acceleration of guardrail vibration was at least for 1 second.
8. traffic hazard alarming method by monitoring according to claim 5, is characterized in that: in described step 4, second accekeration of at least continuous 10 milliseconds is greater than the second setting value, is judged to be to have occurred traffic hazard.
9. traffic hazard alarming method by monitoring according to claim 5, is characterized in that: described the second setting value is greater than described the first setting value, and the first setting value is 6g, and described the second setting value is 25g.
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| 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 |
| CN106200862A (en) * | 2015-01-15 | 2016-12-07 | 联发科技股份有限公司 | Power saving method and mobile electronic device |
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| CN106200862A (en) * | 2015-01-15 | 2016-12-07 | 联发科技股份有限公司 | Power saving method and mobile electronic device |
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| 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 |
| CN106740631A (en) * | 2017-01-12 | 2017-05-31 | 深圳市元征科技股份有限公司 | Vehicle collision detection method and device based on acceleration transducer |
| WO2019085285A1 (en) * | 2017-11-02 | 2019-05-09 | 深圳佳比泰智能照明股份有限公司 | Monitoring method and system for highway |
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| 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 |
| 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 |
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