Summary of the invention
One object of the present invention, is to provide a kind of condition checkout gear for balanced car with two wheels newly.
Condition checkout gear for balanced car with two wheels of the present invention, comprising:
First pressure transducer, described first pressure transducer is arranged on the first tire of this balanced car with two wheels, for measuring the pressure of the first tire;
Second pressure transducer, described second pressure transducer is arranged on the second tire of this balanced car with two wheels, for measuring the pressure of the second tire;
The signal processor be connected with the second pressure transducer with described first pressure transducer, for carrying out data processing to the pressure data of the first tire measured and the pressure data of the second tire;
The first wireless transceiver be connected with signal processor, for the pressure data of the pressure data and the second tire that send the first tire after described signal processor processes;
The second wireless transceiver matched with described first wireless transceiver, for receiving described in the first wireless transceiver sends the pressure data of the first tire after treatment and the pressure data of the second tire;
The central control unit be connected with the second wireless transceiver, for the pressure data of the first tire after treatment described in receiving and the pressure data of the second tire, and according to the change value of pressure of the first tire under previous state and current state and the change value of pressure of the second tire, determine the running status that this balanced car with two wheels is current.
Another object of the present invention, is the condition detection method providing a kind of balanced car with two wheels.
Condition detection method for balanced car with two wheels of the present invention, comprises the following steps:
A, measures the first state pressure value of two tires of this balanced car with two wheels under laststate respectively;
B, measures the current state force value of described two tires under current state respectively, and according to described first state pressure value and current state force value, calculates the pressure variety of two tires under laststate and current state;
C, according to the pressure variety of described two tires, judges the running status of this balanced car with two wheels.
Preferably, in described step a, state when this balanced car with two wheels is unloaded is set as the first state;
In described step b, state when driver being stood on balanced car with two wheels is set as current state;
In described step c, comprise and judge that driver drives the step of attitude, this step comprises:
Determine that driver to weigh value in the standard that standard is driven under attitude;
Compared with value of pressure variety and this standard being weighed, determine that whether the driving attitude of driver is correct.
Preferably, in described step c, comprise and judge pavement behavior determining step in driving, this step comprises:
When this pressure variety is greater than 5% of the mean value of the first state pressure value of these two tires, judge that the road conditions under current state are rugged and rough road surface.
Preferably, in described step c, comprise and judge to turn to condition adjudgement step in driving, this step comprises:
When the pressure variety of a described tire is negative value, and the pressure variety of another tire be on the occasion of time, judge that current state is turn condition.
Preferably, in described step c, comprise and judge free falling body state step in driving, this step comprises:
When this pressure variety equal adding of the car body weight of this balanced car with two wheels and load weight and time, judge that current state is free falling body state.
Preferably, in described step c, comprise and judge whether this balanced car with two wheels is in the step of unmanned state, this step comprises:
When this pressure variety equals the load weight of this balanced car with two wheels, judge that current state is unmanned state.
Another object of the present invention, is to provide a kind of method of weighing to the load-carrying of balanced car with two wheels.
Method of weighing to the load-carrying of balanced car with two wheels of the present invention, comprises the following steps:
A, for two tires of balanced car with two wheels set the first parameter P1 to be calibrated and the second parameter P2 respectively, and these two tire force value Fs1 separately, Fs2 when measuring unloaded;
B, is separately positioned on the loads that two pieces of quality are M1 for the position that driver's both feet are trampled on balanced car with two wheels, and measures now these two tire force value Fe1 separately, Fe2;
C, be separately positioned on by the loads that two pieces of quality are M2 for the position that driver's both feet are trampled on balanced car with two wheels, and measure now these two tire force value Fe3 separately, Fe4, wherein said M2 and M1 is different;
D, determines P1, P2 according to following equation:
2M1=P1 × (Fe1-Fs1)+P2 × (Fe2-Fs2), and
2M2=P1×(Fe3-Fs1)+P2×(Fe4-Fs2);
E, when this balanced car with two wheels is under load condition, calculates load-carrying L according to following formula:
L=P1×ΔF1+P2×ΔF2,
Wherein, the pressure variety of these two tires under Δ F1, Δ F2 are respectively load condition and under light condition.
Condition checkout gear for balanced car with two wheels of the present invention and method, according to the tyre pressure sensor be arranged in the tire of left and right, calculate the change of tire pressure, and then obtain the running status of system.The state that control system can be judged according to this, the controling parameters of adjustment balance in real time, or safety traffic prompting is sent to driver, thus ensure that the handling of vehicle operates in optimum state.
Embodiment
Below with reference to the accompanying drawings and embodiment, the composition of the condition checkout gear for balanced car with two wheels of the present invention and method, step are described in more detail.
In general, feature of the present invention, be to utilize the variable quantity of the force value measured by pressure transducer under different conditions be arranged on balanced car with two wheels two tires, judge the state of balanced car with two wheels, such as driver drives attitude whether normal, pavement state, steering state, free falling body state or unmanned state etc.Central control unit in balanced car with two wheels judges according to above state further, can propose corresponding suggestion to driver, or directly controls balanced car with two wheels.
As shown in Figure 2, it is the composition schematic diagram of the condition checkout gear for balanced car with two wheels of the present invention, composition graphs 1, particularly, this is used for the condition checkout gear of balanced car with two wheels, comprise: the first pressure transducer 116, this first pressure transducer 116 is arranged on the first tire 21 of this balanced car with two wheels 20, for measuring the pressure of the first tire 21; Second pressure transducer 118, second pressure transducer 118 is arranged on the second tire 22 of this balanced car with two wheels 20, for measuring the pressure of the second tire 22; The signal processor 120 be connected with the second pressure transducer 118 with the first pressure transducer 116, for carrying out data processing to the pressure data of the first tire 21 measured and the pressure data of the second tire 22; The first wireless transceiver 130 be connected with signal processor 120, for sending the pressure data of the first tire 21 after signal processor 120 processes and the pressure data of the second tire 22; The second wireless transceiver 210 matched with the first wireless transceiver 130, for receiving described in the first wireless transceiver 130 sends the pressure data of the first tire 21 after treatment and the pressure data of the second tire 22; The central control unit 220 be connected with the second wireless transceiver 210, for the pressure data of the pressure data and the second tire 22 that receive the first tire 21 after treatment, and according to the change value of pressure of the first tire 21 under previous state and current state and the change value of pressure of the second tire 22, determine the running status that this balanced car with two wheels 20 is current.
First pressure transducer 116, second pressure transducer 118, signal processor 120 and the first wireless transceiver 130 be composition signals collecting end 100 jointly.Second wireless transceiver 210 and central control unit 220 composition Signal reception and end for process 200 jointly.Particularly, described first pressure transducer 116 and the second pressure transducer 118 all adopt the conventional pressure transducer that can detect the tire pressure of balanced car with two wheels; Signal processor 120 adopts conventional signal handling equipment, such as, and the process processed the transducing signal that the first pressure transducer 116 and the second pressure transducer 118 export is same as the prior art, comprises the signal transacting step that analog to digital conversion, filtering, amplification etc. are conventional.First wireless transceiver 130 and the second wireless transceiver 210 adopt conventional wireless transmitting device.Central control unit 220, as control module, for receiving the signal that the second wireless transceiver 210 sends, and carries out running status judgement according to these signals and controls the running status of balanced car with two wheels further.For the present invention, the tire pressure of the first tire 21 that central control unit 220 can detect according to the first pressure transducer 116 and the second pressure transducer 118 and the second tire 22, judges the running status of balanced car with two wheels.This by following to the description of the condition detection method for balanced car with two wheels of the present invention in be described in detail.
As shown in Figure 3, be the process flow diagram of the condition detection method for balanced car with two wheels utilizing said apparatus.The method comprising the steps of S100-S300.In the step s 100, the first state pressure value of two tires of this balanced car with two wheels under laststate is measured respectively; In step s 200, measure the current state force value of described two tires under current state respectively, and according to above-mentioned first state pressure value and current state force value, calculate the pressure variety of two tires under laststate and current state; In step S300, according to the pressure variety of described two tires, judge the running status of this balanced car with two wheels.Below further combined with accompanying drawing 1,2,3, each step is described in more detail.
Step S100.In this step, utilize the first pressure transducer 116 and the second pressure transducer 118, the first tire 21 of balanced car with two wheels under laststate 20 and the force value of the second tire 22 are measured.After measurement after signal processing unit 120 processes, be transported in central control unit 220 by the first wireless transceiver 130, second wireless transceiver 210.
Step S200.In this step, utilize the first pressure transducer 116 and the second pressure transducer 118, the first tire 21 of balanced car with two wheels under current state 20 and the force value of the second tire 22 are measured.Similarly, after measurement after signal processing unit 120 processes, be transported in central control unit 220 by the first wireless transceiver 130, second wireless transceiver 210.
Step S300.In this step, by the change value of pressure of current state compared to laststate, judge the running status of balanced car with two wheels.After judging running status, central control unit can send prompting according to actual conditions, or carries out control adjustment to the running status of balanced car with two wheels.
Above-mentioned motion state judges the pavement state judgement, steering state judgement, free falling body state judgement, unmanned state judgement etc. that can comprise the driving pose discrimination of driver, current driving.Below in conjunction with each embodiment, the method that above each state judges is described in detail.
embodiment 1, drives attitude and judges.
In this embodiment, can pressure variety be utilized, the driving attitude correctness of driver is judged.This is because, in the process of driver, owing to driving the incorrect of attitude, such as pin steps on the difference of position and the difference of double-legged assigner's body weight, likely cause the front and back pressure change difference of two tires greatly, this can cause easily occurring the accidents such as rollover when turning, and is unfavorable for traffic safety.By the present invention, can work as drive attitude incorrect time, driver is reminded, allows its adjustment standing place or bipod reasonable distribution body weight.Particularly:
In step 100, state during this balanced car with two wheels zero load is set as the first state;
In step 200, state when driver being stood on balanced car with two wheels is set as current state;
In step 300, comprise and judge that driver drives the step of attitude, this step comprises: (1) determines that driver to weigh value in the standard that standard is driven under attitude; (2), compared with value of pressure variety and this standard being weighed, determine that whether the driving attitude of driver is correct.This standard value of weighing refers to the weight of the driver when correctly standing.Such as, to weigh 1/10 of value if pressure variety has exceeded this standard, be then judged as that the driving attitude of driver is incorrect, now central controller sends prompting, reminds driver to line up, or bipod reasonable distribution body weight.
embodiment 2, pavement behavior judges.
In this embodiment, according to pressure variety, road conditions can be judged.When balanced car with two wheels travels on the road surface of different road conditions, such as flat road surface and rugged road surface, two pressure transducers 116 and 118 be arranged in tire 21,22 can collect the pressure change brought on different road surface.Amplitude as periodically variable in tire pressure in flat road surface is less, get rid of tyre temperature to the impact of pressure, tire pressure change is less than 5% of tire average gas pressure, and rugged and rough road surface is up sail time, pressure transducer can collect the spike force value changed greatly, get rid of tyre temperature to the impact of pressure, tire pressure change is between the 5%-10% of tire average gas pressure, indivedual larger tire pressure change of jolting can exceed 10% of tire average gas pressure, but this spike force value half the time is all very short, majority is less than 0.5s, therefore, the amplitude that can be changed by force value and duration and identifiable design flat road surface and rugged and rough road surface.Identify travel on rugged and rough road surface time, now can advise that driver reduces the speed of a motor vehicle or automatically reduces the speed of a motor vehicle to guarantee safe driving.
Therefore, in step 300, can comprise and judge pavement behavior determining step in driving, this step comprises: when this pressure variety is greater than 5% of the mean value of the first state pressure value of two tires, judges that the road conditions under current state are rugged and rough road surface.Thus can propose to slow down accordingly suggestion to driver.Easy understand, in this embodiment, the mensuration of the first state pressure value, carries out after driver gets on the bus.
embodiment 3, steering state judges.
In this embodiment, tire pressure variable quantity can be utilized, vehicle steering state is in the process of moving judged.Particularly, in step 300, can comprise judge drive in turn to condition adjudgement step, this step comprises: when the pressure variety of a described tire is negative value, and the pressure variety of another tire be on the occasion of time, judge that current state is turn condition.
When balanced car with two wheels is when turning, because the center of gravity of balanced car with two wheels is higher, if excessive velocities, under the influence of centrifugal force, turning side wheel likely departs from ground thus causes overturning, in such cases, tyre pressure sensor can detect the pressure change of both sides tire, as wall pressure of turning diminishes and opposite side pressure becomes large, coordinate signal for turn, when central control unit identification is turned, whether the pressure of both sides tire has obvious change, can judge car is to which lopsidedness by tire pressure change, as wall pressure of turning diminishes and opposite side pressure becomes large, then car tilts laterally, as turned, wall pressure change is large and opposite side pressure diminishes, then car tilts to the inside, thus can judge turn not enough or turn excessive, can advise that the sensitivity of driver or the adjustment speed of a motor vehicle and turning is automatically to guarantee safe driving.
embodiment 4, free falling body state judges.
In this embodiment, whether freely falling body can be done to balanced car with two wheels or parabolic motion judges.Determination methods is, in step 300, comprise free falling body state step in judging to drive, this step comprises: when this pressure variety equal adding of the car body weight of this balanced car with two wheels and load weight and time, judge that current state is free falling body state.
Particularly, because balanced car with two wheels is the principle of work according to reversible pendulum system, control servomotor action, thus make vehicle body maintain a dynamic balance state.When the overall center of gravity top rake of driver and vehicle, built-in servo-electric chance in vehicle body produces strength forward, the moment of torsion that one side balance people and car are toppled over forward, another aspect produces the acceleration allowing vehicle advance and balances to maintain car body, on the contrary, when the center of gravity of driver is toward hypsokinesis, also the strength that can produce backward reaches counterbalance effect.When balanced car with two wheels is when doing freely falling body or parabolic motion, the vehicle body attitude that its attitude sensor may detect turns forward, control wheel rotates forward to keep balance by such control module fast, equally, if attitude sensor detects that vehicle body attitude tilts backwards, control wheel rotates backward to keep balance by such control module fast, due to now wheel hanging, namely light condition is in, the rotation forward or backward that wheel is too fast may be caused, thus make car out of trim in the moment of tire ground connection, cause overturn accident occurs.
When balanced car with two wheels is when doing freely falling body or parabolic motion, because tire is in vacant state, now the weight of car and people do not born by tire, tyre pressure sensor can detect that the pressure of two tires diminishes all suddenly, and change value of pressure equals car body weight adds upper load weight of getting on the bus, central control unit is after identifying, impact when can keep or reduce wheel speed to prevent wheel from landing causes out of trim.
embodiment 5, unmanned condition adjudgement.
In this embodiment, comprise whether being that unmanned state judges.Particularly, in step 300, comprise and judge whether this balanced car with two wheels is in the step of unmanned state, this step comprises: when this pressure variety equals the load weight of this balanced car with two wheels, judges that current state is unmanned state.
When balanced car with two wheels in the process of moving, if run into emergency case, driver likely makes and jumps car action, now two wheeler is in unmanned state, be easy to cause the accident, for ensureing safety, need whether onboard on-line checkingi is carried out to people, to be equivalent on car a very large load to unload because people gets off, tyre pressure sensor can detect that the pressure of two tires diminishes all suddenly, and change value of pressure equals load weight on car, if central control unit detects that on car, load disappears a period of time (such as 2s), driver can be judged not onboard, wheel speed can be reduced and stop to ensure safety.
In addition, present invention also offers a kind of method utilizing the load-carrying of said apparatus to balanced car with two wheels to weigh, the method comprises the following steps:
1, for two tires of balanced car with two wheels set the first parameter P1 to be calibrated and the second parameter P2 respectively, and utilize these two tire force value Fs1 separately, Fs2 when measuring unloaded.Composition graphs 2, force value Fs1, Fs2 when utilizing the first pressure transducer 116 and the second pressure transducer 118 to measure zero load, be then transported to central control unit 220 by the first wireless transceiver 130 and the second wireless transceiver 210.
2, similarly, the loads that two pieces of quality are M1 is separately positioned on for the position that driver's both feet are trampled on balanced car with two wheels, and measures now these two tire force value Fe1 separately, Fe2.
3, further, be separately positioned on by the loads that two pieces of quality are M2 for the position that driver's both feet are trampled on balanced car with two wheels, and measure now these two tire force value Fe3 separately, Fe4, the value of wherein said M2 and M1 is different.
4, determine P1, P2 according to following equation:
2M1=P1 × (Fe1-Fs1)+P2 × (Fe2-Fs2), and
2M2=P1×(Fe3-Fs1)+P2×(Fe4-Fs2);
5, when this balanced car with two wheels is under load condition, calculate load-carrying L according to following formula:
L=P1×ΔF1+P2×ΔF2,
Wherein, the pressure variety of these two tires under Δ F1, Δ F2 are respectively load condition and under light condition.
This weight may be used for the controling parameters of adjustment System, makes the handling of vehicle remain on optimum state.
In sum, the condition checkout gear for balanced car with two wheels of the present invention and method, according to the tyre pressure sensor be arranged in the tire of left and right, calculate the change of tire pressure, and then obtain the running status of system.The state that control system can be judged according to this, the controling parameters of adjustment balance in real time, or safety traffic prompting is sent to driver, thus ensure that the handling of vehicle operates in optimum state.