CN102566542B - Motor vehicle load safety monitoring system and method thereof - Google Patents

Motor vehicle load safety monitoring system and method thereof Download PDF

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CN102566542B
CN102566542B CN201210003966.1A CN201210003966A CN102566542B CN 102566542 B CN102566542 B CN 102566542B CN 201210003966 A CN201210003966 A CN 201210003966A CN 102566542 B CN102566542 B CN 102566542B
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motor vehicle
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陈得民
沈唯真
罗银生
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BEIJING WILL CREATE TECHNOLOGY CO., LTD.
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BEIJING BEETECH TECHNOLOGY Inc
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Abstract

The invention discloses a motor vehicle load safety monitoring system and a method thereof, and the system includes a sensor and a load information processing platform, wherein the sensor is mounted at a connection part between a vehicle body bearing axle and a vibration damping steel sheet, is used for sensing the vehicle load in a preset acquisition period, and outputs the digital information to the load information processing platform after amplifying, filtering and digitally converting the sensed simulation information in a wireless manner; furthermore, the load information processing platform receives the digital information output by the sensor, performs data processing, acquires the motor vehicle load, and triggers a warning after confirming that the motor vehicle load exceeds the preset load threshold value. By using the motor vehicle load safety monitoring system and the method thereof, the cost for detecting an overload is reduced, and the reliability of motor vehicle driving is improved.

Description

Motor vehicle load safety monitoring system and method
Technical field
The present invention relates to safety monitoring technology, particularly a kind of motor vehicle load safety monitoring system and method.
Background technology
According to statistics, overload is the principal element of motor vehicle generation road traffic traffic accident.Because car body is when surpassing motor vehicle self load, be difficult to accurately control its travel route, the reliability of travelling is low, thereby hides some dangers for for road traffic accident; Further, motor vehicle is when turning, and car body is stressed can be uneven, and when this imbalance surpasses certain threshold value, car body will be turned on one's side; And the overload of motor vehicle will cause serious destruction to road and bridge.
At present, for the overload of motor vehicle, mainly adopt static weighbridge detection method, be the general assembly (TW) of weighing machine motor-car, deduct the weight of this motor vehicle self, obtain the load of this motor vehicle, if the load obtaining exceeds the rated load of this motor vehicle, determine this overload of motor-driven vehicle.But the weighbridge cost of the method setting is higher and settled the impact in geographic position, motor vehicle need to drive to the position that is provided with weighbridge and just can detect, thereby, when motor vehicle original upload load, whether load that can not determine loading overloads, and, travelling to before being provided with the position of weighbridge, may cause the generation of road traffic traffic accident.At present also do not have the overload that a kind of effective method causes in original upload load and driving process motor vehicle to carry out real-time dynamic monitoring.
Summary of the invention
In view of this, fundamental purpose of the present invention is to propose a kind of motor vehicle load safety monitoring system, reduces and detects the cost of overload, the reliability of raising motor-driven vehicle going.
Another object of the present invention is to propose a kind of motor vehicle load safety monitoring method, reduce and detect the cost of overload, the reliability of raising motor-driven vehicle going.
For achieving the above object, the invention provides a kind of motor vehicle load safety monitoring system, this system comprises: sensor and load information processing platform, wherein,
Sensor, be arranged on the junction of car body bearing wheel shaft and vibration damping steel plate, in the collection period setting in advance, perception deadlight load, the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform;
Load information processing platform, the numerical information of receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm.
Further comprise:
Remote monitoring center, the warning message sending by wireless mode for receiving load information processing platform, stores and analyzes.
Described load information processing platform is further used for storing the license plate number information of this motor vehicle, when to remote monitoring center outputting alarm information, and the license plate number information of carrying this motor vehicle.
Described load information processing platform is further used for obtaining the global position system GPS information of this motor vehicle, when to remote monitoring center outputting alarm information, carries this GPS information.
Described sensor comprises: sensitive element unit, data processing unit, communication unit and power supply unit, wherein,
Sensitive element unit, for perception deadlight load, exports the analog information of perception to data processing unit;
Data processing unit, for receiving the analog information of sensitive element unit output, amplifies and filtering and digital conversion export communication unit to after processing;
Communication unit, for sending the numerical information of data processing unit output;
Power supply unit, is used to sensitive element unit, data processing unit and communication unit that operating voltage is provided.
Described communication unit is further used for receiving the acquisition instructions of load information processing platform output, exports sensitive element unit to;
Sensitive element unit, enters duty according to acquisition instructions, and perception deadlight load, after gathering, is placed in dormant state by self.
Described sensor further comprises:
Digital signal processor, is connected with power supply unit by integrated circuit interface circuit or UART Universal Asynchronous Receiver Transmitter interface, the voltage of monitoring power supply unit, power supply unit voltage lower than set in advance voltage threshold time, notice load information processing platform.
Described load information processing platform comprises: interface display unit, GPS positioning unit, the first communication unit, the second communication unit, data processing unit and power supply unit, wherein,
Interface display unit, for showing the installation site information of sensor on motor vehicle, shows warning information and the installation of sensors positional information corresponding to warning information of data processing unit output;
GPS positioning unit, for obtaining the GPS information of motor vehicle, exports data processing unit to;
The first communication unit, the numerical information for the output of receiving sensor communication unit, exports data processing unit to;
The second communication unit, for sending to remote monitoring center by the information of data processing unit output;
Data processing unit, for the numerical information of receiving sensor output, carry out data processing, obtain motor vehicle load, in definite motor vehicle load, surpass after the load threshold value setting in advance, to interface display unit outputting alarm information and installation of sensors positional information corresponding to warning information; The GPS information that receives the output of GPS positioning unit, is carried in warning information, to the second communication unit output;
Power supply unit, is used to interface display unit, GPS positioning unit, the first communication unit, the second communication unit and data processing unit to provide work required voltage.
A motor vehicle load safety monitoring method, the method comprises:
Be arranged on the sensor senses deadlight load of car body bearing wheel shaft and vibration damping steel plate junction, in the collection period setting in advance, the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform;
The numerical information of load information processing platform receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm.
The described sensor that is arranged on car body bearing wheel shaft and vibration damping steel plate junction comprises:
Be arranged on the sensor of car body bearing wheel shaft and car body center, vibration damping steel plate junction, and,
Be arranged on the sensor of car body bearing wheel shaft and vibration damping steel plate junction and centrosymmetric two side positions of car body.
Described triggering alarm comprises:
Generate warning information, this warning information and installation of sensors positional information corresponding to warning information are shown on the display panel of load information processing platform; And/or,
Generate warning information, this warning information and installation of sensors positional information corresponding to warning information are sent to the remote monitoring center setting in advance by wireless network; And/or,
To exceeding the measuring point corresponding to sensor of load threshold value, carry out sound and light alarm.
Described load information processing platform is set up the mapping relations of sensor identification and installation of sensors position in advance, and for the sensor of each installation site, load threshold value corresponding to this installation site is set respectively, the described data processing of carrying out, obtain motor vehicle load, after definite motor vehicle load surpasses the load threshold value setting in advance, comprise:
Receive the numerical information that each sensor is exported in collection period;
According to sensor performance parameter, determine the load that this sensor numerical information is corresponding, as motor vehicle load;
According to this sensor identification inquiry, obtain this sensor load threshold value, if motor vehicle load corresponding to this sensor numerical information surpasses the corresponding load threshold value of this sensor, determine that motor vehicle load surpasses the load threshold value setting in advance.
Described automobile-carried pocket is drawn together: measuring point single load, measuring point average load and comprehensive average load.
As seen from the above technical solutions, a kind of motor vehicle load safety monitoring system provided by the invention and method, this system comprises: sensor and load information processing platform, wherein, sensor, is arranged on the junction of car body bearing wheel shaft and vibration damping steel plate, in the collection period setting in advance, perception deadlight load, amplifies the analog information perceiving, after filtering, digital conversion, by wireless mode, export numerical information to load information processing platform; Load information processing platform, the numerical information of receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm.Like this, utilize common sensor to carry out load safety monitoring, cost is low, can effectively reduce the cost that detects overload; Further, installation of sensors is not subject to the impact in geographic position, easy for installation, load information that can Real-time Obtaining motor vehicle, and when overload, outputting alarm, be convenient to take measures in time, can effectively prevent overload of motor-driven vehicle, thereby avoid the destruction of overload to road, improve the reliability of motor-driven vehicle going.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention motor vehicle load safety monitoring system structural representation.
Fig. 2 is the mounting structure schematic diagram of the invention process ratio sensor on motor vehicle.
Fig. 3 is the structural representation of the invention process ratio sensor.
Fig. 4 is the load information processing platform structure schematic diagram of the embodiment of the present invention.
Fig. 5 is embodiment of the present invention motor vehicle load safety monitoring method schematic flow sheet.
Embodiment
For making the object, 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.
The existing method that detects overload of motor-driven vehicle by weighbridge, the weighbridge cost of setting is higher and be subject to the impact in geographic position, can not meet the demand of Real-Time Monitoring motor vehicle.
Wireless sensor network (WSN based on technology of Internet of things, Wireless Sensor Network) be the wireless network forming by Ad hoc mode with a large amount of static or mobile sensors, sensor is for the information of monitoring target in perception, collection, processing radio sensor network monitoring region, and send to user or remote monitoring center by wireless network, so that user or remote monitoring center are added up, analyzed according to the data message receiving, thereby the running state information of knowing monitoring target is to realize monitoring.Because sensor can transmit the data of collection in real time, and have and build fast, dispose feature easily, and be not vulnerable to the restriction of monitoring of environmental, therefore, in fields such as environmental monitoring, urban traffic control, medical monitoring, warehousing management, automotive electronics, have good application.
In the embodiment of the present invention, consideration is applied to the safety monitoring of motor vehicle load by wireless sensor network technology, junction at car body bearing wheel shaft and vibration damping steel plate, sensor installation, be used for Real-time Collection deadlight load information to carry out the monitoring of automobile safety state, the load information of collection is wirelessly transmitted to load information processing platform, load information processing platform carries out data processing by the load information of each measuring point of car body receiving, by car body, differentiate algorithm, judge whether motor vehicle overloads, whether car body is unbalance and whether each measuring point overflows, if there is extremely, send warning message, like this, can effectively prevent overload of motor-driven vehicle, unbalance accident and the destruction of overload to road of waiting initiation.
Fig. 1 is embodiment of the present invention motor vehicle load safety monitoring system structural representation.Referring to Fig. 1, this system comprises: sensor and load information processing platform, and sensor is connected to load information processing platform by wireless network or wired mode, wherein,
Sensor, be arranged on the junction of car body bearing wheel shaft and vibration damping steel plate, in the collection period setting in advance, perception deadlight load, the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform;
In the embodiment of the present invention, the relative weighbridge of sensor, cost is low, easy for installation, can effectively reduce the cost that detects overload.
Sensor can be power sensor, can be also strain transducer etc.
Preferably, the sensor that is arranged on junction can be for a plurality of, the corresponding measuring point of each sensor, lay respectively at the car body center in the junction of car body bearing wheel shaft and vibration damping steel plate, in order to perception car body centre-line load, and, at junction and centrosymmetric two side positions of car body of car body bearing wheel shaft and vibration damping steel plate, load in order to perceptron motor-car in car body both sides, turning, each sensor is connected to load information processing platform by wireless network or wired mode respectively.
Sensor can, directly by arranging that at measuring point the mode of foil gauge detects, can be also to detect by the mode on its inner integrated strain gage bridge road is installed.
Load information processing platform, the numerical information of receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm.
In the embodiment of the present invention, load information processing platform can be arranged in the pilothouse of motor vehicle.
As previously mentioned, if it is a plurality of being arranged on the sensor of junction, load information processing platform is further the sensor setting sensor identification of installing, and export sensor to, set up the mapping relations of sensor identification and installation of sensors position, and for the sensor of each position, load threshold value corresponding to this position is set respectively.
Triggering alarm can be to generate warning information, this warning information and installation of sensors positional information corresponding to warning information are shown on the display panel of load information processing platform, so that automobile driver is known loaded information, thereby take in real time corresponding measure to avoid overload, also can be that this warning information and installation of sensors positional information corresponding to warning information that generate are sent to the remote monitoring center setting in advance by wireless network, so that remote monitoring center records related overload information, and respective handling measure is monitored and taked to this motor vehicle.
Further, the pre-stored license plate number information that has this motor vehicle of load information processing platform, when to remote monitoring center outputting alarm information, the license plate number information of carrying this motor vehicle.
In practical application, load information processing platform also, for obtaining GPS (GPS, the Global Position System Receiver) information of this motor vehicle, when to remote monitoring center outputting alarm information, carries this GPS information.
This system further comprises:
Remote monitoring center, the warning message, geographic position and the license plate number that for receiving load information processing platform, by wireless mode, send, store and analyze.
Fig. 2 is the mounting structure schematic diagram of the invention process ratio sensor on motor vehicle.Referring to Fig. 2, below the chassis of vehicle body of motor vehicle, be the vibration damping steel plate that bears deadlight load, vibration damping steel plate is arranged on car body bearing wheel shaft, car body bearing wheel shaft is by bearings, and bearing is arranged on wheel center, and sensor is arranged on the junction of car body bearing wheel shaft and vibration damping steel plate.
Fig. 3 is the structural representation of the invention process ratio sensor.Referring to Fig. 3, this sensor comprises: sensitive element unit, data processing unit, communication unit and power supply unit, wherein,
Sensitive element unit, for perception deadlight load, exports the analog information of perception to data processing unit;
In the embodiment of the present invention, sensitive element unit perception measured variable delicately (deadlight load) is also made response.
Data processing unit, for receiving the analog information of sensitive element unit output, amplifies and filtering and digital conversion export communication unit to after processing;
In the embodiment of the present invention, data processing unit is mainly that the numerical information (load information) that sensitive element unit is recorded is carried out acquisition process, for example, amplification, filtering, digital conversion are processed, and the numerical information that processing is obtained sends to load information processing platform by communication unit.
Communication unit, for sending the numerical information of data processing unit output;
In the embodiment of the present invention, communication unit adopts 802.15.4 agreement to carry out the wireless transmission of data.
In practical application, sensor does not need always in running order, responds to and gathers analog information, in order to reduce the power consumption of sensor, preferably, communication unit for receiving the acquisition instructions of load information processing platform output, exports sensitive element unit to further;
In the embodiment of the present invention, communication unit receives the acquisition instructions that load information processing platform issues, for example, start command of acquisition, the acquisition instructions that stops, sampling rate arrange instruction, the instruction of sensor group number and channel number instruction, export sensitive element unit to, so that sensitive element unit carries out corresponding operating according to acquisition instructions.
Sensitive element unit, enters duty according to acquisition instructions, and perception deadlight load, after gathering, is placed in dormant state by self.
Wherein, communication unit comprises: power amplifier and radio-frequency antenna (not shown).
In the embodiment of the present invention, power amplifier is used for solving long-distance transmissions problem, comprises the radio-frequency power amplifier on sendaisle, for example, and the low noise amplifier on HFA3925 and receiving cable, for example, HFA3424.Wherein, radio-frequency power amplifier HFA3925 is used for realizing 2.4GHz transmit signal power enlarging function, and gain amplifier maximum can reach 28dB, and output power maximum can reach 250mW; Low noise amplifier HFA3424 is used for realizing 2.4GHz and receives signal low noise amplification function, and gain amplifier can reach 14dB.
In the embodiment of the present invention, can use the System on Chip/SoC that data processing unit and communication unit are integrated, for example, CC2430 realizes data processing and transfer function, System on Chip/SoC CC2430 comprises direct sequence spread spectrum (DSSS, Direct Sequence Spread Spectrum) radio-frequency (RF) transceiver and small and exquisite efficient 8051 controllers of technical grade of a high-performance 2.4GHz.Like this, can improve handling property and meet and take ZigBee as basic 2.4GHz ISM wave band application is to requirement low-cost, low-power consumption.
The design of CC2430 combines the RAM of 8Kbyte and powerful peripheral module, size only has the encapsulation of 7 * 7mm 48-pin, employing has 0.18 & microm CMOS standard technique of embedded flash memory, can realize digital baseband processor, radio frequency (RF), mimic channel and system storage, and by these Function Integration Mechanisms on same silicon wafer.
Requirement for the execution of protocol stack, network and application software to MCU processing power, 8 8051 controllers that CC2430 comprises enhancement mode industrial standard, operation clock 32MHz.Due to execution time faster with by removing the mode of the bus state being wasted, make CC2430 enhancement mode 8051 kernels of use standard 8051 instruction set, there is the performance of standard 8051 kernels of 8 times.
CC2430 is also integrated for the peripheral hardware of User Defined application.In CC2430, the integrated data confidentiality agreement (AES of an enhancing, Advanced Encryption Standard) coprocessor, to support the operation of (128 key words) AES that IEEE802.15.4MAC safety is required, to realize the least possible microcontroller that takies.
Power supply unit, is used to sensitive element unit, data processing unit and communication unit that operating voltage is provided.
In the embodiment of the present invention, power supply unit can be battery, for realizing the power supply to system active device, can also carry out management of charging and discharging to battery simultaneously.
Preferably, power supply unit can adopt respectively independently power management to sensitive element unit, data processing unit and the communication unit of system, makes it enter dormant state or closes its power supply, thereby total system power consumption is reduced greatly when it is idle.
Further, this sensor also comprises digital signal processor (not shown), by integrated circuit interface circuit (IIC, Integrated Circuit Interface Circuit) or UART Universal Asynchronous Receiver Transmitter (UART, Universal Asynchronous Receiver Transmitter) interface is connected with power supply unit, the voltage of realization to power supply unit, the real-time monitoring of electric current and temperature conditions, prevent that power supply from overcharging and owing the generation of electrical phenomena, power supply unit voltage lower than set in advance voltage threshold time, notice load information processing platform is changed in time battery and is battery charging.
Fig. 4 is the load information processing platform structure schematic diagram of the embodiment of the present invention.Referring to Fig. 4, this load information processing platform comprises: interface display unit, GPS positioning unit, the first communication unit, the second communication unit, data processing unit and power supply unit, wherein,
Interface display unit, for showing the installation site information of sensor on motor vehicle, shows warning information and the installation of sensors positional information corresponding to warning information of data processing unit output;
In the embodiment of the present invention, interface display unit, also for acquisition is set, is the display panel of display switch key on load information processing platform, measuring point arrangenent diagram, measuring point data, measuring point sound and light alarm, threshold value setting, relevant monitoring command set.
GPS positioning unit, for obtaining the GPS information of motor vehicle, exports data processing unit to;
In the embodiment of the present invention, GPS can realize real-time navigation and the location in global range, and GPS is comprised of deep space satellite, ground control system, three parts of subscriber equipment.
The basic fixed position principle of GPS is: every gps satellite is issued its position and time data signal constantly, receiver user can be measured every satellite-signal to the time delay of receiver, according to the speed of signal transmission, can calculate receiver to the distance of different satellites.While collecting the data of at least 4 satellites, just can calculate three-dimensional coordinate, speed and time simultaneously.
Because GPS has Global coverage and the feature such as precision is high, locating speed is fast, real-time is good, antijamming capability is strong, at home and abroad be widely used in recent years, in every field, brought into play great effect, become the information age cannot or a scarce part.
In the embodiment of the present invention, use GSU-38A0GPS module.Be characterized in that volume is little, interface is simple, reliability is strong, can be used for DSP, ARM, Single Chip Microcomputer (SCM) system.By by input voltage 5V input fixed power source pio chip LT1085, export 3.3V voltage to GSU-38A0GPS module chip.
GSU-38A0GPS module has 12 data parallel receive passages, has comprised 8 data bit, 1 start bit, 1 position of rest, without correction bit, and output level is that CMOS level, electric current are 1mA.Communication mode adopts asynchronous serial communication, and the communication speed of acquiescence is 4800baud, and receive frequency is 1575.42 ± 1.0MHz, L1 wave band C/A code.
GSU-38A0GPS module can provide longitude, latitude, speed, highly, world concordant time, frequency and gps satellite orbit information etc.Its maximum feature is: low pressure 3.3V power supply; Working current is not higher than 50mA (containing antenna consumption); High sensitivity-145dBm; Least unit that can output time is 0.01 second.
This GSU-38A0GPS module has the flash storer of 8M, information format can be NMEA-0183 or Binary, adopt ASCII (ASCII, American Standard Code for Information Interchange) code, subsidiary center of antenna frequency is 1575.42MHz, right-hand screw polarization, be more than or equal to-5dB of gain, axis is than being 3dB.
The first communication unit, the numerical information for the output of receiving sensor communication unit, exports data processing unit to;
The second communication unit, for sending to remote monitoring center by the information of data processing unit output;
In the embodiment of the present invention, the second communication unit is that related data in load information processing platform is sent to remote monitoring center by GPRS (General Packet Radio Service) (GPRS, General Packet Radio Service) network.
GPRS is a kind of wireless, packet-switched technology based on gsm system, provides end to end, the wireless IP of wide area connects, and has advantages of real-time online, charging according to quantity, quick login, high-speed transfer, freely switches.The transmission speed of current GSM mobile radio communication is 9.6K byte per second, and GPRS mobile phone transmission speed can reach 115Kbps.
GPRS carries out data transmission in the mode of packet switch, owing to being packet switch, therefore in the utilization factor of Internet resources, compared with circuit switching, be greatly improved, and GPRS can carry out the transmission of voice and data simultaneously, and charging can be added up according to the flow of generation completely.
Data processing unit, for the numerical information of receiving sensor output, carry out data processing, obtain motor vehicle load, in definite motor vehicle load, surpass after the load threshold value setting in advance, to interface display unit outputting alarm information and installation of sensors positional information corresponding to warning information; The GPS information that receives the output of GPS positioning unit, is carried in warning information, to the second communication unit output;
In the embodiment of the present invention, data processing unit can also be when to remote monitoring center outputting alarm information, the license plate number information of carrying this motor vehicle.Preferably, data processing unit adopts the AT89S52 of Atmel company, obtain the data of GPS positioning unit and the first communication unit, according to the sensor performance parameter that sends numerical information, numerical information is carried out to data processing, numerical information is scaled to corresponding deadlight load information, and differentiate algorithm by the inside car body setting in advance, result is shown by Display panel unit, and send to remote monitoring center by the second communication unit.
AT89S52 is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontrollers, there is 8K at system programmable Flash storer, adopt the manufacture of Atmel company high-density nonvolatile memory technology, completely compatible with the instruction of industrial 80C51 product and pin, make AT89S52 provide high flexible, super effective solution for numerous embedded Control application systems.
In addition, AT89S52 can be down to the operation of 0Hz static logic, supports 2 kinds of softwares can select energy-saving mode.Under idle pulley, CPU quits work, and allows RAM, timer/counter, serial ports, interruption to work on; Under power down protection mode, RAM content is saved, and oscillator is frozen, and all work of single-chip microcomputer stop, until next, interrupting or hardware reset.
Car body being differentiated to algorithm below describes.
It is mainly that each measuring point data is processed that car body is differentiated algorithm, judges:
(1) exceed the measuring point of load threshold value;
(2) car body overload;
(3) car body is unbalance, left avertence or right avertence;
Arthmetic statement is as follows:
If always have 4 measuring point A, B, C, D, collection period is t.
Sensor is measured each measuring point data (simulation load information):
A1，A2，...，An；B1，B2，...，Bn；C1，C2，...，Cn；D1，D2，...，Dn。N is natural number.
According to the motor vehicle model of monitoring, obtain the load threshold value of each measuring point, wherein, the load threshold value of each measuring point can be according to motor vehicle model, car body rated load and point position, by Finite Element Method, actual experiment test or automotive designs company, obtain, the load threshold value of establishing measuring point A, B, C, D is respectively Fa, Fb, Fc, Fd:
If An >=Fa or Bn >=Fb or Cn >=Fc or Dn >=Fd, send warning message.
Certainly, in practical application, also can in collection period t, calculate each measuring point data mean value
Figure BDA0000129105010000121
Figure BDA0000129105010000122
wherein, A ‾ = Σ i = 1 n A i n :
If
Figure BDA0000129105010000124
or
Figure BDA0000129105010000125
or
Figure BDA0000129105010000126
or
Figure BDA0000129105010000127
send warning message.
Can also, according to motor vehicle model, calculate car body average load threshold value F:
In collection period t, according to each measuring point mean value calculation, go out deadlight load population mean
Figure BDA0000129105010000131
If
Figure BDA0000129105010000132
send warning message.
Load information processing platform shows each measuring point load value, and further to exceeding the measuring point of load threshold value, carries out sound and light alarm, triggers alarm for sending sound and light alarm.
Power supply unit, is used to interface display unit, GPS positioning unit, the first communication unit, the second communication unit and data processing unit to provide work required voltage.
In above-mentioned example, GPS positioning unit and the second communication unit are not to realize unit required in this invention.
Fig. 5 is embodiment of the present invention motor vehicle load safety monitoring method schematic flow sheet.Referring to Fig. 5,
Step 501, be arranged on the sensor senses deadlight load of car body bearing wheel shaft and vibration damping steel plate junction, in the collection period setting in advance, the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform;
In this step, the sensor that is arranged on car body bearing wheel shaft and vibration damping steel plate junction comprises:
Be arranged on the sensor of car body bearing wheel shaft and car body center, vibration damping steel plate junction, and,
Be arranged on the sensor of car body bearing wheel shaft and vibration damping steel plate junction and centrosymmetric two side positions of car body.
Preferably, when sensor is exported after the analog information perceiving is processed, process in the numerical information obtaining and carry the sensor identification setting in advance.
Further, sensor the collection period time setting in advance then, self is placed in to dormant state, monitoring, from the acquisition of load information processing platform, after receiving acquisition, enters acquisition state.
Step 502, the numerical information of load information processing platform receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm.
In this step, described load information processing platform is arranged in the pilothouse of motor vehicle.
Further, load information processing platform is set up the mapping relations of sensor identification and installation of sensors position in advance, and for the sensor of each installation site, load threshold value corresponding to this installation site is set respectively, carry out data processing, obtain motor vehicle load, after definite motor vehicle load surpasses the load threshold value setting in advance, comprise:
Receive the numerical information that each sensor is exported in collection period;
According to sensor performance parameter, determine the load that this sensor numerical information is corresponding, as motor vehicle load;
In this step, amount of digital information is directly proportional to the size of motor vehicle load, and according to sensor performance parameter, for example, enlargement factor, determines the load that this Sensor Analog Relay System information is corresponding, specifically can, referring to correlation technique document, not repeat them here.
In practical application, automobile-carried pocket is drawn together: measuring point single load, measuring point average load and comprehensive average load.
The corresponding measuring point of each sensor, establishing the analog information that measuring point is numbered the measuring point perception of A is A i, wherein, i is natural number:
Measuring point single load is A i;
Measuring point average load
Figure BDA0000129105010000141
computing formula be:
A ‾ = Σ i = 1 n A i n
In formula, n is the number of times gathering in collection period.
Comprehensive average load
Figure BDA0000129105010000143
computing formula be:
M ‾ = Σ j = 1 k A ‾ j k
In formula, the number that k is measuring point;
it is the measuring point average load of j measuring point.
According to this sensor identification inquiry, obtain this sensor load threshold value, if load corresponding to this Sensor Analog Relay System information surpasses this sensor load threshold value, determine that motor vehicle load surpasses the load threshold value setting in advance.
In this step, if the overload of the load of the sensor senses that install the car body center of the junction of car body bearing wheel shaft and vibration damping steel plate shows car body overload; If the load overload of the sensor senses that centrosymmetric two side positions of the junction of car body bearing wheel shaft and vibration damping steel plate and car body are installed, shows that car body is unbalance.
Load corresponding to this Sensor Analog Relay System information surpasses this sensor load threshold value and comprises:
A i>=F a, or
A ‾ ≥ F ‾ a , Or
M ‾ ≥ F ‾
In formula,
F afor measuring point single load threshold value;
for measuring point average load threshold value;
Figure BDA0000129105010000154
for comprehensive average load threshold value.
In above formula, F a,
Figure BDA0000129105010000155
and
Figure BDA0000129105010000156
can, according to motor vehicle model, car body rated load and point position, by Finite Element Method, actual experiment test or automotive designs company, obtain.
Triggering alarm comprises:
Generate warning information, this warning information and installation of sensors positional information corresponding to warning information are shown on the display panel of load information processing platform; And/or,
Generate warning information, this warning information and installation of sensors positional information corresponding to warning information are sent to the remote monitoring center setting in advance by wireless network; And/or,
To exceeding the measuring point corresponding to sensor of load threshold value, carry out sound and light alarm.
Further, the method also comprises:
The pre-stored license plate number information that has this motor vehicle of load information processing platform, when to remote monitoring center outputting alarm information, the license plate number information of carrying this motor vehicle.
The method can also comprise:
Obtain the GPS information of this motor vehicle, when to remote monitoring center outputting alarm information, carry this GPS information.
Certainly, in practical application, the method can also comprise:
Load information processing platform receives the acquisition of user's input, exports sensor to so that sensor gathers analog information according to acquisition.
Acquisition comprises: start command of acquisition, the acquisition instructions that stops, sampling rate arrange instruction, the instruction of sensor group number and channel number instruction.
From above-mentioned, motor vehicle load safety monitoring system and the method for the embodiment of the present invention, by the junction sensor installation at car body bearing wheel shaft and vibration damping steel plate, perception deadlight load, and the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform; Load information processing platform carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm.Like this, utilize common sensor to carry out load safety monitoring, cost is low, easy for installation, can effectively reduce the cost that detects overload; Further, installation of sensors is not subject to the impact in geographic position, load information that can Real-time Obtaining motor vehicle, and when overload, outputting alarm, is convenient to take measures in time, can effectively prevent overload of motor-driven vehicle, thereby avoided the destruction of overload to road, improved the reliability of motor-driven vehicle going; And installation of sensors is flexible, can be arranged on centrosymmetric two side positions of car body, the load in order to perceptron motor-car in car body both sides, turning, thus can the unbalance accident causing that waits of effectively pre-preventing motor-vehicle.
The foregoing is only preferred embodiment of the present invention, be not intended to limit 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 (8)

1. a motor vehicle load safety monitoring system, is characterized in that, this system comprises: sensor, load information processing platform and remote monitoring center, wherein,
Sensor, be arranged on the junction of car body bearing wheel shaft and vibration damping steel plate, in the collection period setting in advance, perception deadlight load, the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform;
Described sensor comprises: sensitive element unit, data processing unit, communication unit and power supply unit, wherein,
Sensitive element unit, for perception deadlight load, exports the analog information of perception to data processing unit;
Data processing unit, for receiving the analog information of sensitive element unit output, amplifies and filtering and digital conversion export communication unit to after processing;
Communication unit, for sending the numerical information of data processing unit output;
Power supply unit, is used to sensitive element unit, data processing unit and communication unit that operating voltage is provided;
Load information processing platform, the numerical information of receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm;
Described load information processing platform comprises: interface display unit, GPS positioning unit, the first communication unit, the second communication unit, data processing unit and power supply unit, wherein,
Interface display unit, for showing the installation site information of sensor on motor vehicle, shows warning information and the installation of sensors positional information corresponding to warning information of data processing unit output;
GPS positioning unit, for obtaining the GPS information of motor vehicle, exports data processing unit to;
The first communication unit, the numerical information for the output of receiving sensor communication unit, exports data processing unit to;
The second communication unit, for sending to remote monitoring center by the information of data processing unit output;
Data processing unit, numerical information for the output of receiving sensor communication unit, carry out data processing, obtain motor vehicle load, in definite motor vehicle load, surpass after the load threshold value setting in advance, to interface display unit outputting alarm information and installation of sensors positional information corresponding to warning information, and for receiving the GPS information of GPS positioning unit output, be carried in warning information, to the second communication unit output;
Power supply unit, is used to interface display unit, GPS positioning unit, the first communication unit, the second communication unit and data processing unit to provide work required voltage;
Remote monitoring center, the warning message sending by wireless mode for receiving load information processing platform, stores and analyzes.
2. the system as claimed in claim 1, is characterized in that, described load information processing platform is further used for storing the license plate number information of this motor vehicle, when to remote monitoring center outputting alarm information, and the license plate number information of carrying this motor vehicle.
3. the system as claimed in claim 1, is characterized in that, described communication unit is further used for receiving the acquisition instructions of load information processing platform output, exports sensitive element unit to;
Sensitive element unit, enters duty according to acquisition instructions, and perception deadlight load, after gathering, is placed in dormant state by self.
4. the system as claimed in claim 1, is characterized in that, described sensor further comprises:
Digital signal processor, is connected with power supply unit by integrated circuit interface circuit or UART Universal Asynchronous Receiver Transmitter interface, the voltage of monitoring power supply unit, power supply unit voltage lower than set in advance voltage threshold time, notice load information processing platform.
5. a motor vehicle load safety monitoring method, is characterized in that, the method comprises:
Be arranged on the sensor senses deadlight load of car body bearing wheel shaft and vibration damping steel plate junction, in the collection period setting in advance, the analog information perceiving is amplified, after filtering, digital conversion, by wireless mode, exported numerical information to load information processing platform;
The numerical information of load information processing platform receiving sensor output, carries out data processing, obtains motor vehicle load, in definite motor vehicle load, surpasses after the load threshold value setting in advance, and triggers alarm;
Wherein, described load information processing platform is set up the mapping relations of sensor identification and installation of sensors position in advance, and for the sensor of each installation site, load threshold value corresponding to this installation site is set respectively, the described data processing of carrying out, obtain motor vehicle load, after definite motor vehicle load surpasses the load threshold value setting in advance, comprise:
Receive the numerical information that each sensor is exported in collection period;
According to sensor performance parameter, determine the load that this sensor numerical information is corresponding, as motor vehicle load;
According to this sensor identification inquiry, obtain this sensor load threshold value, if motor vehicle load corresponding to this sensor numerical information surpasses the corresponding load threshold value of this sensor, determine that motor vehicle load surpasses the load threshold value setting in advance.
6. method as claimed in claim 5, is characterized in that, described in be arranged on car body bearing wheel shaft and vibration damping steel plate junction sensor comprise:
Be arranged on the sensor of car body bearing wheel shaft and car body center, vibration damping steel plate junction, and,
Be arranged on the sensor of car body bearing wheel shaft and vibration damping steel plate junction and centrosymmetric two side positions of car body.
7. method as claimed in claim 6, is characterized in that, described triggering alarm comprises:
Generate warning information, this warning information and installation of sensors positional information corresponding to warning information are shown on the display panel of load information processing platform; And/or,
Generate warning information, this warning information and installation of sensors positional information corresponding to warning information are sent to the remote monitoring center setting in advance by wireless network; And/or,
To exceeding the measuring point corresponding to sensor of load threshold value, carry out sound and light alarm.
8. method as claimed in claim 5, is characterized in that, described automobile-carried pocket is drawn together: measuring point single load, measuring point average load and comprehensive average load; Wherein, the corresponding measuring point of each sensor, establishing the analog information that measuring point is numbered the measuring point perception of A is A i, wherein, i is natural number:
Measuring point single load is A i;
Measuring point average load
Figure FDA0000408468790000031
computing formula be:
In formula, n is the number of times gathering in collection period;
Comprehensive average load
Figure FDA0000408468790000041
computing formula be:
Figure FDA0000408468790000042
In formula, the number that k is measuring point;
Figure FDA0000408468790000043
it is the measuring point average load of j measuring point.
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