CN106926805B - Tipper lifts operation early warning device that turns on one's side based on tire pressure monitoring - Google Patents
Tipper lifts operation early warning device that turns on one's side based on tire pressure monitoring Download PDFInfo
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- CN106926805B CN106926805B CN201710170146.4A CN201710170146A CN106926805B CN 106926805 B CN106926805 B CN 106926805B CN 201710170146 A CN201710170146 A CN 201710170146A CN 106926805 B CN106926805 B CN 106926805B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/0455—Transmission control of wireless signals
- B60C23/0461—Transmission control of wireless signals externally triggered, e.g. by wireless request signal, magnet or manual switch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0002—Type of accident
- B60R2021/0018—Roll-over
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Abstract
The invention provides a dumper lifting operation side-turning early warning device based on tire pressure monitoring, and particularly relates to the technical field of dumper side-turning prevention early warning devices. The device comprises a tire pressure receiving, analyzing and early warning module, a tire pressure measuring and transmitting module and a low-frequency awakening module, wherein the tire pressure receiving, rollover and early warning module is connected with the low-frequency awakening module, the low-frequency awakening module is connected with the tire pressure measuring and transmitting module through a wireless low-frequency signal, and the tire pressure measuring and transmitting module is connected with the tire pressure receiving, analyzing and early warning module through a wireless radio-frequency signal. The device can be used for preparing judgment of the dangerous condition of side turning of the vehicle body in the unloading and lifting process, and can give an early warning in time when the vehicle is close to side turning, so as to remind a driver of cautious operation or stop lifting operation.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of rollover prevention early warning devices of a dumper, in particular to a rollover early warning device for dumper lifting operation based on tire pressure monitoring.
[ background of the invention ]
The rollover of the automobile is a major traffic safety accident which causes life and property loss. The dump truck is a vehicle which can unload goods by self through hydraulic or mechanical lifting, and is a special vehicle, the dump truck determines that the whole dump truck has the characteristics of high centroid position, relatively large mass and volume, relatively overloaded wheel track and the like due to self structural factors, and when the dump truck is lifted by a lifting cylinder to dump loaded goods, rollover accidents are easy to happen, and the instability risk of the dump truck is higher than that of a common vehicle. When a rollover accident occurs, a driver hardly feels the occurrence of rollover. According to statistics, the automobile rollover accident becomes a serious automobile accident next to the frontal collision, and the dump truck has higher total mass center height than that of a general truck due to self structural factors, so that the rollover risk is higher, and particularly, the rollover possibility is increased due to the rapid change of the load capacity of the dump truck in the lifting operation process.
A special, most harmful failure mode of a dump truck is operational rollover instability during unloading. Because the dumper usually adopts a structure that a frame is separated from a dumper box and an open dumper box, the dumper box has weak rigidity during unloading, and the dumper is more prone to transverse rollover and serious accidents during lifting and unloading operation due to the influences of the physical and chemical properties, weather, roads and working sites of cargos. In recent years, with the increase of the demands of large-tonnage and long-and-high-compartment dumper in the transportation industry, the carriages of heavy dumper manufacturers are made larger. Although heavy-duty vehicle chassis factories and upper-loading production enterprises respectively strengthen the design of the frame, the suspension, the axle, the auxiliary frame, the carriage and other bearing parts for improving the bearing capacity of the respective production parts, the stability of the unloading operation of the dump truck is reduced due to the increase of the integral mass center height of the dump truck.
For the design of the rollover early-warning system of the dump truck, domestic and foreign scholars have a lot of researches. Lateral load transfer rate: the lateral load transfer of the vehicle varies with the roll of the vehicle, and when the roll angle of the vehicle reaches a critical value, the load transfer reaches a maximum value, which directly causes the wheels on one side to lift off the ground and lift. The vehicle is in a critical state of roll instability. A relation between change of transverse load transfer and passenger car rollover is provided in an article which is published in Changchun university school news in 12 months in 2014, namely heavy vehicle modeling research considering transverse load transfer, and an article which is published in Hunan university school news in 5 months in 2013, namely passenger car roll stability analysis based on transverse load transfer, and a theoretical model is provided. However, the dump truck is difficult to obtain transverse load transfer due to the fact that the driving operation environment of the dump truck is severe and the structure of the dump truck is different from that of a passenger car, and even if the rollover warning accuracy in the lifting operation process of the dump truck by using the method in the literature is obtained, the rollover warning accuracy is poor.
In 1990, Rekheja et al developed an early Warning system (Rekheja s. and Piche a.. Development of Directional Stability for obtaining Safety device sae Paper No.902265,1990) for the Directional Stability of heavy vehicles, which judges whether the vehicle is in a rollover dangerous state by comparing whether the lateral acceleration is greater than a set threshold value under the condition of static steering and sends out a Warning signal to the driver, but the method is too simple and the Warning performance is poor. In addition, the rollover early warning system of the dumper designed by the method can only monitor the rollover dangerous condition of the dumper in the running state and cannot early warn the rollover dangerous condition of the dumper in the lifting and unloading working condition. In 2011, according to the structure and the operation characteristics of a dump truck, a dump truck rollover warning device (Xiaxijing, Huxiaming, Chenjie) is designed by Xiaxijing of the industry institute of Huaiyin according to the rollover warning device of the dump truck [ J ].2011, 7: 25-27.), the system estimates the height of the center of mass of the dump truck in real time through the values measured by the load sensors and the side inclination angle sensors at the left side and the right side of the dump truck, reads the side inclination angle of the rollover limit of the dump truck obtained through experiments according to different heights of the center of mass, sets the side inclination angle as the threshold value of the side inclination angle of the dump truck, and gives an alarm if the real-time side inclination angle of the dump truck is larger than. Although the system is used for monitoring the rollover danger of the dump truck during the static lifting and unloading operation, the system has larger system error because the mass center of the vehicle is not accurately obtained by the system through the load sensors at the left side and the right side and the side inclination angle sensor. In addition, the left and right side load sensors are not convenient to install on the dump truck, and after the left and right side load sensors are installed, the left and right side load sensors are easy to damage due to the fact that the dump truck runs in a severe environment, the accuracy of the sensors is also reduced, and the accurate early warning capability of the system is reduced.
In conclusion, compared with a car, a passenger car and the like, the dump truck has the characteristics of high mass center, large geometric dimension, long action response time and small roll stiffness of a suspension system, and particularly has the characteristics that when the dump truck is lifted under the self-unloading vehicle-mounted condition, the truck box is lifted, the mass center is higher, the wheel track is relatively overloaded along with the continuous change of the position of the mass center in the unloading process, and the like, the stability is poor, and the rollover is more easily caused particularly in the lifting operation process. In the prior art, an early warning device with accurate early warning capability is lacked in the lifting process of a dump truck.
[ summary of the invention ]
The invention aims to: the invention provides a dumper lifting operation rollover early warning device based on tire pressure monitoring, which can be used for preparing judgment of rollover danger of a dumper body in the unloading and lifting process, and can give an early warning in time when the dumper body is close to rollover to remind a driver of cautious operation or stopping lifting operation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a tipper lifts operation early warning device that turns on one's side based on tire pressure monitoring, includes tire pressure receiving analysis early warning module, tire pressure measurement transmitting module, low frequency awakens the module up, tire pressure receiving side early warning module with the low frequency awakens the module up and link to each other, the low frequency awakens the module up with the tire pressure measurement transmitting module passes through wireless low frequency signal connection, the tire pressure measurement transmitting module with the tire pressure receiving analysis early warning module is connected through wireless radio frequency signal.
The principle of the invention is as follows: the tire pressure receiving, analyzing and early warning module is started during lifting operation, the tire pressure receiving, analyzing and early warning module sends a wake-up instruction to the low-frequency wake-up module and activates the low-frequency wake-up module, the low-frequency wake-up module transmits a wireless low-frequency wake-up signal to the tire pressure measuring and transmitting module, the tire pressure measuring and transmitting module starts to measure the tire pressure value of each working tire of the dump truck after receiving the wireless low-frequency wake-up signal, the tire pressure values are analyzed to obtain a tire pressure value group and then are transmitted to a tire pressure receiving, analyzing and early warning module in a wireless radio frequency signal mode, the tire pressure receiving, analyzing and early warning module processes the tire pressure value set and obtains the unloading real-time state parameters, and then comparing the real-time state parameters with a built-in preset threshold value to generate early warning signals of different levels, and sending out alarm signals of different levels to the driver according to the early warning signals of different levels.
Preferably, the tire pressure receiving, analyzing and early warning module is installed in the cab. The environment where the dumper is lifted is generally noisy, and the tire pressure receiving, analyzing and early warning module is installed in a cab, so that a driver can conveniently notice an alarm signal. On the other hand, the tire pressure receiving, analyzing and early warning module needs to be started after the dump truck starts lifting operation, is arranged in the cab to facilitate operation, and simultaneously shortens the starting time.
More preferably, the low-frequency wake-up module is installed in the cab. The side turning of the dumper accounts for more than half of the side turning of the dumper during lifting operation, and the time of the lifting operation and the total starting time of the dumper are not one tenth, if the dumper is started. All modules in the tipper lifting operation early warning device that turns on one's side all are in operating condition, can accelerate each module depreciation and ageing speed, reduce working life, also can increase energy consumption and cost, awaken the module through setting up the low frequency, only need the operation tipper lifting operation early warning device that turns on one's side, through arousing the module of awakening the low frequency, the module is awakened to the low frequency and transmits for tire pressure measurement emission module and railway carriage inclination angle sensor through wireless low frequency signal, make both get into operating condition, solution above-mentioned problem that can be fine.
More optimally, the tire pressure receiving, analyzing and early warning module consists of a radio frequency receiver, a microprocessor, an LCD display screen and an alarm device; the radio frequency receiver, the LCD display screen and the alarm device are respectively connected with the microprocessor, and the microprocessor is connected with the low-frequency awakening module; the radio frequency receiver is connected with the tire pressure measuring and transmitting module through a wireless radio frequency signal and is used for receiving the wireless radio frequency signal sent by the tire pressure measuring and transmitting module.
Further preferably, the tire pressure receiving, analyzing and early warning module is further provided with a lifting linkage device, and the lifting linkage device is connected with the microprocessor. The lifting linkage device can directly start a microprocessor in the tire pressure receiving, analyzing and early warning module in a linkage manner after the dump truck executes a lifting command, and the microprocessor activates the low-frequency awakening module so as to start the dump truck lifting operation rollover early warning device, so that the time for running, monitoring, displaying and alarming of the whole system is shortened. Because the dumper executes the lifting command in the early stage within 8-15s when starting to lift, the shaking of the dumper reaches a small peak, and usually, the driver usually pays attention to the fact that more than 80% of people in the lifting operation forget to manually start the dumper lifting operation rollover early-warning device in the time period, so that rollover accidents occur in the early stage. The lifting linkage device is arranged or the self-dumping truck lifting operation side-turning early warning device is automatically started within 0.5S of starting the lifting operation.
Further preferably, the tire pressure measuring and transmitting module is installed in each tire of the dumper.
Preferably, the tire pressure measuring and transmitting module comprises a low-frequency awakening receiver, a tire pressure sensor, an analysis processor, a radio frequency transmitter and a power supply; the low-frequency awakening receiver, the tire pressure sensor, the analysis processor and the radio frequency transmitter are sequentially connected, and the power supply provides power for the components; the low-frequency awakening receiver is connected with the low-frequency awakening module through a wireless low-frequency signal and is used for receiving the wireless low-frequency signal sent by the low-frequency awakening module; the radio frequency transmitter is connected with the tire pressure receiving, analyzing and early warning module through a wireless radio frequency signal and is used for transmitting the wireless radio frequency signal to the tire pressure receiving, analyzing and early warning module.
The system is further optimized and further comprises a wagon box inclination sensing module, wherein the wagon box sensor is formed by connecting a low-frequency awakening receiver, a wagon box inclination angle sensor and a radio frequency transmitter in series, and the low-frequency awakening receiver is connected with the low-frequency awakening module through a wireless low-frequency signal and is used for receiving the wireless low-frequency awakening signal sent by the low-frequency awakening module; the radio frequency transmitter is connected with the tire pressure receiving, analyzing and early warning module through a wireless radio frequency signal and is used for transmitting the wireless radio frequency signal to the tire pressure receiving, analyzing and early warning module.
Further preferably, the carriage inclination angle sensor is a dual-axis inclination angle sensor.
Further preferably, the low frequency wake-up module is installed in the cab.
The working principle and the using method of the further refinement are as follows: in the lifting operation process, the microprocessor sends a wake-up instruction to the low-frequency wake-up module and activates the low-frequency wake-up module, the low-frequency wake-up module respectively and simultaneously transmits a wireless low-frequency wake-up signal to the low-frequency wake-up receiver, the low-frequency wake-up receiver receives the wireless low-frequency wake-up signal and transmits the signal to the tire pressure sensor, the tire pressure sensor starts to measure the tire pressure value of each tire of the dump truck and transmits the tire pressure value to the analysis processor, the analysis processor analyzes a plurality of tire pressure values to obtain a tire pressure value group and then transmits the tire pressure value group to the radio frequency transmitter, and the radio frequency transmitter. After the low-frequency wake-up receiver receives the wireless low-frequency wake-up signal, the wagon box inclination angle sensor transmits a signal, the wagon box inclination angle sensor starts to measure the inclination of the wagon box in the lifting process of the dump truck and transmits the inclination to the radio frequency transmitter, and the radio frequency transmitter transmits the inclination of the wagon box to the radio frequency receiver in a wireless radio frequency signal mode.
The radio frequency receiver receives the tire pressure value group and the inclination of the carriage and transmits the tire pressure value group and the inclination of the carriage to the microprocessor, the microprocessor processes the tire pressure value group and the inclination of the carriage to obtain unloading real-time state parameters, then the real-time state parameters are compared with a built-in preset threshold value to generate early warning signals of different levels, and the microprocessor sends out alarm signals of different levels to the LCD display screen and the alarm device respectively according to the early warning signals of different levels.
In the present invention, the real-time status parameter refers to the real-time LTR value and/or LTCR value and/or car inclination.
The LTR, i.e., the lateral load transfer rate, is the absolute value of the difference between the tire loads on both sides of the vehicle axle divided by the sum of all the tire loads, i.e., LTR ═ G1-G2|/(G1+ G2), G1 is the axle-side tire load, and G2 is the axle-corresponding-side tire load;
LTCR is a lateral load transfer rate, that is, LTCR [ | G1-G2|/(G1+ G2) ]/t, G1 is an axle-side tire load, G2 is a side tire load corresponding to the same axle, and t is a time of load change.
The inclination of the carriage is measured by a carriage inclination angle sensor.
The built-in preset values are obtained by obtaining critical LTR critical values, LTCR critical values and carriage inclination critical values of rollover under various conditions from a large database of rollover occurrence in the lifting process of the dumper, obtaining LTR threshold values, LTCR threshold values and carriage inclination threshold values after completing and adjusting after verifying by using real vehicle load, and writing the threshold values into a tire pressure receiving, analyzing and early warning module (specifically a microprocessor) to obtain built-in preset threshold values. The closer the real-time state parameter is to the built-in preset threshold value, the higher the risk of rollover.
It is understood that the car body tilt angle sensor 42 in this embodiment may be a single-axis sensor or other products of the manufacturer, and the model may be selected from other models, without affecting the purpose of the present invention.
In embodiments 1 to 3 of the present invention, the early warning signals at different levels are ①, where when the real-time status parameter is less than 0.7 × the preset threshold, the warning level G is 0, and belongs to a security level, ②, where the preset threshold is 0.7 × or less, the real-time status parameter is less than 0.8 × the preset threshold, the warning level G is 1, and belongs to a primary warning level, and ③, where the real-time status parameter is greater than or equal to 0.8 × the preset threshold, the warning level G is 2, and belongs to a high-level warning level.
In embodiments 1 to 3 of the present invention, the alarm signals at different levels are: when the alarm level is G-0, the alarm signal is not sent out, the LCD display screen 13 is green, and the alarm device 14 does not make a sound; when the alarm level is G1, the LCD display screen 13 turns yellow and is in a flashing state, and the alarm device 14 sends out a buzzer sound with the frequency of 1 Hz; when the alarm level is G2, the LCD 13 turns red and blinks, and the alarm device 14 sounds a buzzer with an alarm frequency of 2 Hz.
It can be understood that the early warning signals of different levels can also be divided into two levels, four levels, five levels and the like; if the two-stage case is: when the real-time state parameter is less than 0.7 × a preset threshold value, no alarm is given; and when the real-time state parameter is more than or equal to 0.7 × a preset threshold value, alarming. The case of four stages is: the real-time state parameter is less than 0.7 and is less than or equal to 0.7 and less than 0.75; the preset threshold value is not less than 0.75 and is less than 0.85; the real-time state parameter is more than or equal to 0.85 × a preset threshold value; and so on. The above problems of the classification of the reminding and the precision of the reminding are only mentioned, and the implementation of the invention is not influenced.
It will be appreciated that the different levels of alarm signaling may also be performed using other distinctive signals, such as the alarm device 14 being a voice announcement: safety, attention, danger, etc., are matters of use habits only, and do not affect the implementation of the invention.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the dumper lifting operation side-turning early warning device can be used for preparing judgment of the side-turning dangerous situation of a dumper body in the unloading and lifting process in the lifting process of the dumper, and can give an early warning in time when the side-turning is approached so as to remind a driver of cautious operation or stop lifting operation.
2. According to the invention, the tire pressure receiving, analyzing and early warning module and the low-frequency awakening module are connected through wires, the tire pressure measuring and transmitting module, the low-frequency awakening module and the tire pressure receiving, analyzing and early warning module are in a wireless transmission mode, so that system communication becomes simple and convenient, extra wiring outside a driving cab is not needed, the tire pressure measuring and transmitting module is directly connected to the tire of the dump truck, convenience and simplicity are realized, and the influence of motion interference and severe working environment of the dump truck on the monitoring of the sensor is not needed to be worried about. And the device can also output and display the tire pressure value of the tire, so that a driver can better know the tire condition of the dump truck, and the system function is enriched.
3. According to the invention, the low-frequency awakening module is arranged, and only when the dumper lifting operation rollover early warning device needs to be operated, the low-frequency awakening module is excited and transmitted to the tire pressure measuring and transmitting module and the wagon box inclination angle sensor through wireless low-frequency signals, so that the tire pressure measuring and transmitting module and the wagon box inclination angle sensor are enabled to be in a working state, the service life of a system module can be prolonged well, and the energy consumption is reduced.
4. According to the invention, after the dump truck executes the lifting command, the lifting linkage device can directly start the microprocessor in the tire pressure receiving, analyzing and early warning module in a linkage manner, and the microprocessor activates the low-frequency wake-up module so as to start the dump truck lifting operation rollover early warning device, so that the time for running, monitoring, displaying and alarming of the whole system is shortened. The early rollover accident caused by the fact that the dumper is forgotten or started to lift the operation rollover early warning device in a delayed mode by an operator is avoided.
5. When the dump truck unloads goods in the lifting operation, the carriage is lifted, the mass center is lifted, and the stability is reduced; the goods are unloaded continuously, the mass center is changed continuously, and the carriage is easy to incline. According to the invention, the inclination condition of the carriage can be accurately captured in real time through the carriage inclination sensing module, and the inclination condition and other data are mutually verified and assisted, so that the data of inclination of the carriage due to key change in the process of unloading cargos in the unloading process can be more accurately reflected, and the accuracy of the device is improved.
[ description of the drawings ]
Fig. 1 is a schematic structural view of a side-turning early warning device for lifting operation of a dump truck in an embodiment 1 of the invention;
FIG. 2 is a schematic structural view of a side-turning early warning device for lifting operation of a dump truck in an embodiment 2 of the invention;
fig. 3 is a schematic structural view of a rollover warning device for a dump truck in lifting operation in an embodiment 3 of the invention.
In the attached drawing, 1-a tire pressure receiving, analyzing and early warning module, 2-a low-frequency awakening module, 3-a tire pressure measuring and transmitting module, 4-a compartment inclination sensing module, 11-a radio frequency receiver, 12-a microprocessor, 13-an LCD display screen, 14-an alarm device, 31-a low-frequency awakening receiver, 32-a tire pressure sensor, 33-an analyzing processor, 34-a radio frequency transmitter, 35-a power supply, 41-a compartment low-frequency awakening receiver, 42-a compartment inclination angle sensor and 43-a compartment radio frequency transmitter.
[ detailed description ] embodiments
The present invention will be further described with reference to the following examples.
Example 1
Please refer to fig. 1.
A dumper lifting operation rollover early warning device based on tire pressure monitoring comprises a tire pressure receiving, analyzing and early warning module 1, a tire pressure measuring and transmitting module 3 and a low-frequency awakening module 2, wherein the tire pressure receiving, rollover early warning module 1 is connected with the low-frequency awakening module 2, the low-frequency awakening module 2 is connected with the tire pressure measuring and transmitting module 3 through a wireless low-frequency signal, and the tire pressure measuring and transmitting module 3 is connected with the tire pressure receiving, analyzing and early warning module 1 through a wireless radio-frequency signal.
The principle and the using method are as follows: during lifting operation, the tire pressure receiving, analyzing and early warning module 1 is started, the tire pressure receiving, analyzing and early warning module 1 sends a wake-up instruction to the low-frequency wake-up module 2 and activates the low-frequency wake-up module 2, the low-frequency wake-up module 2 transmits a wireless low-frequency wake-up signal to the tire pressure measuring and transmitting module 3, the tire pressure measuring and transmitting module 3 starts to measure the tire pressure value of each working tire of the dump truck after receiving the wireless low-frequency wake-up signal, the tire pressure values are analyzed to obtain a tire pressure value group and then are transmitted to the tire pressure receiving, analyzing and early warning module 1 in a wireless radio frequency signal mode, the tire pressure receiving, analyzing and early warning module 1 processes the tire pressure value set and obtains the unloading real-time state parameters, and then comparing the real-time state parameters with a built-in preset threshold value to generate early warning signals of different levels, and sending out alarm signals of different levels to the driver according to the early warning signals of different levels.
Example 2
Please refer to fig. 1 and fig. 2.
A dumper lifting operation rollover early warning device based on tire pressure monitoring comprises a tire pressure receiving, analyzing and early warning module 1, a tire pressure measuring and transmitting module 3 and a low-frequency awakening module 2; the low-frequency awakening module 2 is installed in the cab.
The tire pressure receiving, analyzing and early warning module 1 is installed in a cab. The tire pressure receiving, analyzing and early warning module 1 consists of a radio frequency receiver 11, a microprocessor 12, an LCD display screen 13 and an alarm device 14; the radio frequency receiver 11, the LCD display screen 13 and the alarm device 14 are respectively connected with the microprocessor 12, and the microprocessor 12 is connected with the low-frequency awakening module 2.
The tire pressure measuring and transmitting module 3 is arranged in each tire of the dumper. The tire pressure measuring and transmitting module 3 consists of a low-frequency awakening receiver 31, a tire pressure sensor 32, an analysis processor 33, a radio frequency transmitter 34 and a power supply 35; the low frequency wake-up receiver 31, the tire pressure sensor 32, the analysis processor 33 and the radio frequency transmitter 34 are connected in sequence, and the power source 35 provides power for the above components, i.e., the low frequency wake-up receiver 31, the tire pressure sensor 32, the analysis processor 33 and the radio frequency transmitter 34.
The microprocessor 12 is connected with the low-frequency wake-up module 2, and the radio frequency receiver 11 is connected with the radio frequency transmitter 34 in the tire pressure measuring and transmitting module 3 through a wireless radio frequency signal and is used for receiving the wireless radio frequency signal sent by the radio frequency transmitter 34. The low-frequency wake-up receiver 31 is connected with the low-frequency wake-up module 2 through a wireless low-frequency signal, and is configured to receive the wireless low-frequency signal sent by the low-frequency wake-up module 2.
Preferably, the tire pressure receiving, analyzing and early warning module 1 further comprises a lifting linkage device 15, and the lifting linkage device 15 is connected with the microprocessor 12. The lifting linkage device 15 is used for transmitting the lifting operation process of the dump truck to the microprocessor in a linkage manner.
The principle and the using method are as follows: the microprocessor 12 is started by the lifting linkage device 15 in linkage in the lifting operation process, the microprocessor 12 sends a wake-up instruction to the low-frequency wake-up module 2 and activates the low-frequency wake-up module 2, the low-frequency wake-up module 2 transmits a wireless low-frequency wake-up signal to the low-frequency wake-up receiver 31, the low-frequency wake-up receiver 31 receives the wireless low-frequency wake-up signal and transmits a signal to the tire pressure sensor 32, the tire pressure sensor 32 starts to measure the tire pressure value of each tire of the dump truck and transmits the tire pressure value to the analysis processor 33, the analysis processor 33 analyzes a plurality of tire pressure values to obtain a tire pressure value set and then transmits the tire pressure value set to the radio frequency transmitter 34, the radio frequency transmitter 34 transmits the tire pressure value set to the radio frequency receiver 11 in a wireless radio frequency signal mode, the radio, then, the real-time state parameters are compared with the built-in preset threshold values to generate early warning signals of different levels, and the microprocessor 12 sends out the alarm signals of different levels to the LCD display screen 13 and the alarm device 14 respectively according to the early warning signals of different levels.
In the present embodiment, the real-time state parameter refers to a real-time LTR value and/or LTCR value, where LTR is a lateral load transfer rate, that is, LTR ═ G1-G2|/(G1+ G2), G1 is an axle-side tire load, and G2 is an axle-corresponding-side tire load;
LTCR is a lateral load transfer rate, that is, LTCR [ | G1-G2|/(G1+ G2) ]/t, G1 is an axle-side tire load, G2 is a side tire load corresponding to the same axle, and t is a time of load change.
Example 3
Please refer to fig. 1, fig. 2 and fig. 3.
The utility model provides a tipper lifts operation early warning device that turns on one's side based on tire pressure monitoring, includes tire pressure receiving analysis early warning module 1, tire pressure measurement emission module 3, low frequency awakens module 2 and railway carriage slope response module 4, and low frequency awakens module 2 and installs in the driver's cabin.
The tire pressure receiving, analyzing and early warning module 1 is installed in a cab. The tire pressure receiving, analyzing and early warning module 1 consists of a radio frequency receiver 11, a microprocessor 12, an LCD display screen 13 and an alarm device 14; the radio frequency receiver 11, the LCD display screen 13 and the alarm device 14 are respectively connected with the microprocessor 12, and the microprocessor 12 is connected with the low-frequency awakening module 2.
The tire pressure measuring and transmitting module 3 is arranged in each tire of the dumper. The tire pressure measuring and transmitting module 3 consists of a low-frequency awakening receiver 31, a tire pressure sensor 32, an analysis processor 33, a radio frequency transmitter 34 and a power supply 35; the low frequency wake-up receiver 31, the tire pressure sensor 32, the analysis processor 33 and the radio frequency transmitter 34 are connected in sequence, and the power source 35 provides power for the above components, i.e., the low frequency wake-up receiver 31, the tire pressure sensor 32, the analysis processor 33 and the radio frequency transmitter 34.
The wagon box sensor 4 is formed by connecting a wagon box low-frequency wake-up receiver 41, a wagon box inclination angle sensor 42 and a wagon box radio frequency transmitter 43 in series. The double-shaft inclination angle sensor is a specific axis sensor produced by Ningbo Marsi electronic technology limited company, the model of the double-shaft inclination angle sensor is BWK216, the output range is 0-5V, and the measuring range is-90 degrees. The carriage inclination angle sensor 3 is horizontally arranged on the lower surface of the self-discharging vehicle carriage 31, the optimized position is arranged on one side of the lower surface of the carriage 31 close to the vehicle head, and the +/-X axis of the carriage inclination angle sensor 3 is parallel to the transverse direction of the self-discharging vehicle carriage 31.
The microprocessor 12 is connected with the low frequency wake-up module 2, and the radio frequency receiver 11 is connected with the radio frequency transmitter 34 and the radio frequency transmitter 43 through wireless radio frequency signals, and is configured to receive the wireless radio frequency signals sent by the radio frequency transmitter 34 and the radio frequency transmitter 43. The low frequency wake-up module 2 is connected to the low frequency wake-up receiver 31 and the low frequency wake-up receiver 41 through wireless low frequency signals, and is configured to receive the wireless low frequency signals sent by the low frequency wake-up module 2 and the low frequency wake-up receiver 41.
The principle and the using method are as follows: in the lifting operation process, the microprocessor 12 sends a wake-up instruction to the low frequency wake-up module 2 and activates the low frequency wake-up module 2, the low frequency wake-up module 2 respectively and simultaneously transmits a wireless low frequency wake-up signal to the low frequency wake-up receiver 31 and the low frequency wake-up receiver 41, the low frequency wake-up receiver 31 transmits a signal to the tire pressure sensor 32 after receiving the wireless low frequency wake-up signal, the tire pressure sensor 32 starts to measure the tire pressure value of each tire of the dump truck and transmits the tire pressure value to the analysis processor 33, the analysis processor 33 analyzes a plurality of tire pressure values to obtain a tire pressure value group and then transmits the tire pressure value group to the radio frequency transmitter 34, and the radio frequency transmitter 34. After the low-frequency wake-up receiver 41 receives the wireless low-frequency wake-up signal, the wagon box inclination angle sensor 42 transmits a signal, the wagon box inclination angle sensor 42 starts to measure the inclination of the wagon box in the lifting process of the dump truck and transmits the measured inclination to the radio frequency transmitter 43, and the radio frequency transmitter 43 transmits the inclination of the wagon box to the radio frequency receiver 11 in a wireless radio frequency signal mode.
The radio frequency receiver 11 receives the tire pressure value group and the inclination of the compartment and transmits the tire pressure value group and the inclination of the compartment to the microprocessor 12, the microprocessor 12 processes the tire pressure value group and the inclination of the compartment to obtain unloading real-time state parameters, then the real-time state parameters are compared with a built-in preset threshold value to generate early warning signals of different levels, and the microprocessor 12 sends the early warning signals of different levels to the LCD display 13 and the warning device 14 respectively according to the early warning signals of different levels.
In this embodiment, the real-time status parameters refer to real-time LTR value, LTCR value, and car inclination.
LTR is the absolute value of the difference between the tire loads on both sides of the vehicle axle divided by the sum of all tire loads, i.e., LTR ═ G1-G2|/(G1+ G2), G1 is the axle-side tire load, and G2 is the same axle-corresponding-side tire load;
LTCR is a change speed of a lateral load transfer rate, that is, | F1-F2|/(F1+ F2) × 1/dt, F1 is a vertical load of a wheel on the outer side of the tire, F2 is a vertical load of a wheel on the inner side of the tire, and dt is a time change.
It is understood that the car body tilt angle sensor 42 in this embodiment may be a single-axis sensor or other products of the manufacturer, and the model may be selected from other models, without affecting the purpose of the present invention.
In embodiments 1 to 3 of the present invention, the early warning signals at different levels are ①, where when the real-time status parameter is less than 0.7 × the preset threshold, the warning level G is 0, and belongs to a security level, ②, where the preset threshold is 0.7 × or less, the real-time status parameter is less than 0.8 × the preset threshold, the warning level G is 1, and belongs to a primary warning level, and ③, where the real-time status parameter is greater than or equal to 0.8 × the preset threshold, the warning level G is 2, and belongs to a high-level warning level.
In embodiments 1 to 3 of the present invention, the alarm signals at different levels are: when the alarm level is G-0, the alarm signal is not sent out, the LCD display screen 13 is green, and the alarm device 14 does not make a sound; when the alarm level is G1, the LCD display screen 13 turns yellow and is in a flashing state, and the alarm device 14 sends out a buzzer sound with the frequency of 1 Hz; when the alarm level is G2, the LCD 13 turns red and blinks, and the alarm device 14 sounds a buzzer with an alarm frequency of 2 Hz.
It can be understood that the early warning signals of different levels can also be divided into two levels, four levels, five levels and the like; if the two-stage case is: when the real-time state parameter is less than 0.7 × a preset threshold value, no alarm is given; and when the real-time state parameter is more than or equal to 0.7 × a preset threshold value, alarming. The case of four stages is: the real-time state parameter is less than 0.7 and is less than or equal to 0.7 and less than 0.75; the preset threshold value is not less than 0.75 and is less than 0.85; the real-time state parameter is more than or equal to 0.85 × a preset threshold value; and so on. The above problems of the classification of the reminding and the precision of the reminding are only mentioned, and the implementation of the invention is not influenced.
It will be appreciated that the different levels of alarm signaling may also be performed using other distinctive signals, such as the alarm device 14 being a voice announcement: safety, attention, danger, etc., are matters of use habits only, and do not affect the implementation of the invention.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (5)
1. A dumper lifting operation rollover early warning device based on tire pressure monitoring is characterized by comprising a tire pressure receiving, analyzing and early warning module, a tire pressure measuring and transmitting module, a low-frequency awakening module and a wagon box inclination sensing module; the tire pressure receiving, analyzing and early warning module consists of a radio frequency receiver, a microprocessor, an LCD display screen, an alarm device and a lifting linkage device, and the tire pressure measuring and transmitting module consists of a carriage low-frequency awakening receiver, a tire pressure sensor, an analyzing processor, a radio frequency transmitter I and a power supply; the wagon box sensor is formed by serially connecting a wagon box low-frequency awakening receiver, a wagon box inclination angle sensor and a radio frequency transmitter II;
during lifting operation, the lifting linkage device can directly start a microprocessor in the tire pressure receiving, analyzing and early warning module in a linkage manner after a dump truck executes a lifting command, the microprocessor sends a wake-up instruction to the low-frequency wake-up module and activates the low-frequency wake-up module, the low-frequency wake-up module respectively and simultaneously transmits wireless low-frequency wake-up signals to the low-frequency wake-up receiver and the carriage low-frequency wake-up receiver, the low-frequency wake-up receiver receives the wireless low-frequency wake-up signals and transmits the signals to the tire pressure sensor, the tire pressure sensor starts to measure the tire pressure value of each tire of the dump truck and transmits the tire pressure value to the analysis processor, the analysis processor analyzes a plurality of tire pressure values to obtain a tire pressure value group and then transmits the; the low-frequency wake-up receiver of the carriage transmits a signal to the carriage inclination angle sensor after receiving the wireless low-frequency wake-up signal, the carriage inclination angle sensor starts to measure the inclination of the carriage in the lifting process of the dump truck and transmits the inclination to the radio frequency transmitter II, and the radio frequency transmitter II transmits the inclination of the carriage to the radio frequency receiver in a wireless radio frequency signal mode;
the radio frequency receiver receives the tire pressure value group and the inclination of the carriage and transmits the tire pressure value group and the inclination of the carriage to the microprocessor, the microprocessor processes the tire pressure value group and the inclination of the carriage to obtain unloading real-time state parameters, then the real-time state parameters are compared with a built-in preset threshold value to generate early warning signals of different levels, and the microprocessor sends out alarm signals of different levels to the LCD display screen and the alarm device respectively according to the early warning signals of different levels.
2. The tire pressure monitoring-based dumper lifting operation rollover warning device according to claim 1, wherein the real-time state parameter refers to real-time LTR value and/or LTCR value and/or car inclination, the LTR is | G1-G2|/(G1+ G2), G1 is axle-side tire load, and G2 is same axle-side tire load; the LTCR [ | G1-G2|/(G1+ G2) ]/t, G1 is an axle-side tire load, G2 is a same axle-corresponding-side tire load, and t is a time of load change; and the inclination of the carriage is measured by a carriage inclination angle sensor.
3. The tire pressure monitoring-based rollover warning device for the dumper during the lifting operation, according to claim 1, is characterized in that the warning signals at different levels are specifically as follows: the real-time state parameter is less than 0.7 and is preset with a threshold value, and the alarm level G is 0 and belongs to a safety level; the preset threshold value 0.7 is less than or equal to the real-time state parameter less than 0.8, the alarm level G is 1, and the alarm level belongs to a primary alarm level; the real-time state parameter is more than or equal to 0.8 × a preset threshold, and the alarm level G is 2, belonging to an advanced alarm level.
4. The tire pressure monitoring-based dumper lifting operation rollover warning device as claimed in claim 1, wherein the wagon box inclination angle sensor is a dual-axis inclination angle sensor.
5. The rollover warning device for the lifting operation of the dump truck based on the tire pressure monitoring as claimed in claim 1, wherein the low frequency wake-up module is installed in a cab, the tire pressure receiving, analyzing and warning module is installed in the cab, and the tire pressure measuring and transmitting module is installed in each tire of the dump truck.
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| CN201710170146.4A CN106926805B (en) | 2017-03-21 | 2017-03-21 | Tipper lifts operation early warning device that turns on one's side based on tire pressure monitoring |
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| CN201710170146.4A CN106926805B (en) | 2017-03-21 | 2017-03-21 | Tipper lifts operation early warning device that turns on one's side based on tire pressure monitoring |
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| CN106926805B true CN106926805B (en) | 2020-06-19 |
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| CN107767490A (en) * | 2017-10-24 | 2018-03-06 | 合肥工业大学 | A kind of method judged for fork truck rollover instability status |
| CN108216594A (en) * | 2017-12-29 | 2018-06-29 | 杭州清本科技有限公司 | Carrier-borne aircraft device for monitoring tyre pressure and system receive terminal |
| CN109532351B (en) * | 2018-11-21 | 2020-05-19 | 上海为彪汽配制造有限公司 | Reminding method and system for tire pressure and side-looking radar of tire |
| CN110823447B (en) * | 2019-11-15 | 2021-10-15 | 武汉杰开科技有限公司 | Storage method of air pressure detection device and related device and system |
| CN113085693B (en) * | 2021-04-28 | 2022-05-03 | 三一汽车制造有限公司 | Dumper rollover prevention system and method based on tire pressure monitoring |
| CN113386647A (en) * | 2021-07-30 | 2021-09-14 | 东风商用车有限公司 | Method, system, vehicle, device and readable storage medium for preventing dump truck from tilting |
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| KR100646464B1 (en) * | 2003-07-29 | 2006-11-14 | 기아자동차주식회사 | An apparatus of Tire presure monitoring system for low air pressure alarm |
| CN204020431U (en) * | 2014-06-03 | 2014-12-17 | 杨为松 | A kind of motor tire management system based on Internet of Things |
| CN204432426U (en) * | 2015-02-10 | 2015-07-01 | 江西凯马百路佳客车有限公司 | Pure electric automobile |
| CN204674465U (en) * | 2015-05-08 | 2015-09-30 | 温州华路交通建设工程有限公司 | A kind of construction machinery and equipment anti-rollover system |
| CN205009891U (en) * | 2015-08-21 | 2016-02-03 | 广州电力机车有限公司 | Electronic round of tipper tyre pressure monitoring system |
| CN105150777B (en) * | 2015-10-28 | 2017-03-22 | 上海泰好电子科技有限公司 | Low-frequency automatic matching method and device for tire pressure monitoring system |
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Effective date of registration: 20180314 Address after: 130000 Dongfeng Street, Changchun automobile economic and Technological Development Zone, Changchun, Changchun, Jilin Applicant after: FAW Jiefang Automotive Co., Ltd. Address before: No. 26, Yufeng District, Liuzhou, the Guangxi Zhuang Autonomous Region, the Guangxi Zhuang Autonomous Region Applicant before: Faw Jiefang Liuzhou Special Automobile Co., Ltd. |
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