CN212125289U - Vehicle steering angle detection system - Google Patents
Vehicle steering angle detection system Download PDFInfo
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- CN212125289U CN212125289U CN202020665053.6U CN202020665053U CN212125289U CN 212125289 U CN212125289 U CN 212125289U CN 202020665053 U CN202020665053 U CN 202020665053U CN 212125289 U CN212125289 U CN 212125289U
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Abstract
The embodiment of the utility model provides a relate to automobile-used sensor technical field, disclose a vehicle steering angle detecting system. The vehicle steering angle detection system includes: the device comprises a control unit, an angle detection unit, an input/output unit and a voltage-stabilizing rectification unit; the voltage-stabilizing rectifying unit is used for supplying power to the control unit, the angle detection unit and the input/output unit; the angle detection unit is used for detecting a first rotation angle based on the Hall sensor; the control unit is used for calculating the wheel steering angle of the vehicle according to the first rotation angle and transmitting the wheel steering angle to the input and output unit; the input and output unit is used for outputting the steering angle of the wheels. The embodiment of the utility model provides a technical scheme detects the angle based on hall sensor, can realize real-time detection vehicle wheel steering angle, and its accuracy is higher, and the reliability is stronger.
Description
Technical Field
The embodiment of the utility model provides a relate to automobile-used sensor technical field, especially relate to a vehicle steering angle detecting system.
Background
With the development of society, the living standard of people is continuously improved, and more people choose to drive a car for going out. However, as vehicles are increasing, the driving roads and parking lots become more and more crowded, and this road condition or parking scene is undoubtedly a challenge for some drivers with poor driving skills, psychological quality and memory. Particularly, in the starting or stopping process, the vehicle scratching accident can be caused to happen due to the fact that a driver does not know the steering angle of the vehicle.
In general, the way of estimating the vehicle steering angle by the number of laps of the vehicle steering wheel is not reliable because: the angle measuring and calculating mode requires that a driver must firmly remember the number of turns of the steering wheel when the driver steers the steering wheel; in the event that the driver is not concentrated or has a poor memory ratio, it is difficult to determine the steering angle of the vehicle in this manner. Meanwhile, the driver needs to have a certain experience accumulation for grasping the relationship between the number of turns of the driving wheel and the rotation direction angle of the wheel, and a beginner can hardly determine the relationship between the two. In addition, the corresponding relations between the two wheels of different vehicles are different, so that the same number of turns of the disc is different for the rotation direction angles of the wheels of different vehicles; thus, if a driver changes away from an unfamiliar vehicle, his original experience is often not applicable.
SUMMERY OF THE UTILITY MODEL
The utility model provides a vehicle turns to angle detecting system to realize real-time detection vehicle wheel and turn to angle, its accuracy is higher, and the reliability is stronger.
The embodiment of the utility model provides a vehicle steering angle detecting system, including control unit, angle detecting element, input/output unit and steady voltage rectification unit;
the voltage-stabilizing rectifying unit is used for supplying power to the control unit, the angle detection unit and the input/output unit; the angle detection unit is used for detecting a first rotation angle based on the Hall sensor; the control unit is used for calculating the wheel steering angle of the vehicle according to the first rotation angle and transmitting the wheel steering angle to the input and output unit; the input and output unit is used for outputting the steering angle of the wheels.
Optionally, the hall sensor comprises a two-axis hall sensor or a three-axis hall sensor.
Optionally, the hall sensor comprises a driving wheel, a driven wheel, a magnet and an induction circuit;
the steering gear comprises a driving wheel, a steering gear rotating shaft and a steering gear, wherein the driving wheel is fixed with the steering gear rotating shaft of the vehicle, and the steering gear rotating shaft drives the driving wheel to rotate synchronously; the driven wheel is connected with the driving wheel in a sawtooth meshed mode, the magnet is fixed to one side, facing the sensing circuit, of the driven wheel, and the magnet rotates along with the driven wheel.
Optionally, the hall sensor further comprises a housing, and a mounting hole is formed in the housing;
the shell is fixedly installed with the vehicle through the installation hole.
Optionally, the vehicle steering angle detection system further comprises a connecting wire, and the hall sensor is in communication connection with the control unit through the connecting wire;
the connecting line is used for transmitting the first rotation angle to the control unit in the form of SENT, SPI, IIC, PWM or voltage.
Optionally, the input and output unit comprises a touch display screen.
Optionally, the touch display screen comprises an LCD screen or an OLED display screen.
Optionally, the vehicle steering angle detection system further includes a power supply unit;
the voltage stabilizing and rectifying unit is used for stabilizing the voltage provided by the power supply unit to a preset voltage value.
Optionally, the power supply unit comprises a vehicle power supply or an independent power supply.
Optionally, the vehicle steering angle detection system further comprises a prompting unit, wherein the prompting unit is in communication connection with the control unit;
the control unit is also used for calculating a difference value between the wheel steering angle and a set prompt threshold value and transmitting prompt information to the prompt unit according to the difference value;
the prompting unit is used for receiving prompting information and prompting according to the prompting information.
The embodiment of the utility model provides a vehicle steering angle detecting system includes the control unit, angle detecting element, steady voltage rectification unit and input/output unit, is used for providing the electricity to the control unit, angle detecting element and input/output unit through setting up steady voltage rectification unit; the angle detection unit is used for detecting a first rotation angle based on the Hall sensor; the control unit is used for calculating the wheel steering angle of the vehicle according to the first rotation angle and transmitting the wheel steering angle to the input and output unit; the input and output unit is used for outputting the steering angle of the wheels, can detect the steering angle of the wheels of the vehicle in real time, and is high in accuracy and reliability.
Drawings
Fig. 1 is a block diagram illustrating a vehicle steering angle detection system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a hardware structure of a vehicle steering angle detection system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an angle detection unit in the vehicle steering angle detection system according to the embodiment of the present invention;
fig. 4 is a schematic view of a work flow of the vehicle steering angle detection system according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating another vehicle steering angle detection system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of another vehicle steering angle detection system according to an embodiment of the present invention;
fig. 7 is a schematic view of another work flow of the vehicle steering angle detection system according to the embodiment of the present invention;
wherein, the embodiment of the utility model provides an in, the reference numeral and the characteristic name that corresponds:
10-a vehicle steering angle detection system, 110-a control unit, 120-an angle detection unit, 130-an input and output unit, 140-a voltage-stabilizing rectification unit, 150-a power supply unit and 160-a prompt unit; 121-mounting holes, 112-connecting wires, 151-external power supply interface, 122-driving wheel, 124-driven wheel, 126-magnet and 128-induction circuit; 200-steering gear axis of the vehicle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the utility model provides a vehicle steering angle detecting system, through setting up steady voltage rectification unit and being used for providing the electricity to control unit, angle detection unit and input/output unit; the angle detection unit is used for detecting a first rotation angle based on the Hall sensor; the control unit is used for calculating the wheel steering angle of the vehicle according to the first rotation angle and transmitting the wheel steering angle to the input and output unit; the input and output unit is used for outputting the steering angle of the wheels. The embodiment of the utility model provides a technical scheme detects the angle based on hall sensor, can realize real-time detection vehicle wheel steering angle, and its accuracy is higher, and the reliability is stronger. Meanwhile, the relevant settings can be adjusted according to the requirements, and the device is suitable for vehicles of various models.
The following describes an exemplary vehicle steering angle detection system and its working process according to an embodiment of the present invention with reference to fig. 1 to 7.
Referring to fig. 1 to 7, the vehicle steering angle detection system 10 includes a control unit 110, an angle detection unit 120, an input-output unit 130, and a voltage stabilization rectification unit 140; the voltage-stabilizing rectifying unit 140 is configured to provide power to the control unit 110, the angle detecting unit 120, and the input/output unit 130; the angle detection unit 120 is configured to detect a first rotation angle based on the hall sensor; the control unit 110 is configured to calculate a wheel steering angle of the vehicle according to the first rotation angle, and transmit the wheel steering angle to the input-output unit 130; the input-output unit 130 is used to output a wheel steering angle.
The voltage stabilizing and rectifying unit 140 is used to supply power to other units to ensure their normal operation. The angle detection unit 120 detects a first rotation angle, which has a correlation with the wheel steering angle, based on the hall sensor, and transmits the angle to the control unit 110; the control unit 110 may calculate a wheel steering angle (see below) according to the first rotation angle by using the correlation between the two, and transmit the wheel steering angle to the input/output unit 130; the input-output unit 130 may show the wheel turning angle to a user (driver, or driver). Therefore, a user can intuitively obtain a more accurate wheel steering angle, and the device is higher in reliability and accuracy.
Optionally, the hall sensor comprises a two-axis hall sensor or a three-axis hall sensor.
Therefore, the two-axis/three-axis Hall technology can be used for detecting the steering angle of the wheels of the vehicle in real time, and the precision and the reliability are high.
Optionally, the hall sensor includes a drive wheel 122, a driven wheel 124, a magnet 126, and an inductive circuit 128; the driving wheel 122 is fixed with a steering gear rotating shaft 200 of the vehicle, and the steering gear rotating shaft 200 drives the driving wheel 122 to rotate synchronously; the follower wheel 124 is in saw-toothed engagement with the drive wheel 122, the magnet 126 is fixed to a side of the follower wheel 124 facing the induction circuit 128, and the magnet 126 follows the rotation of the follower wheel 124.
Thus, the angle detecting unit 120 includes a driving wheel 122, a driven wheel 124, a magnet 126 and a sensing circuit 128; is mounted on a steering wheel rotating shaft 200 of the vehicle. Therefore, when the vehicle is in operation, the steering gear rotating shaft 200 drives the driving pulley 122 of the angle detecting unit 120 to rotate, and drives the driven pulley 124 of the angle detecting unit 120 to rotate through transmission between the gears, so that the magnet 126 mounted and fixed on the driven pulley 124 rotates. The Hall IC using the two-axis/three-axis Hall technology can directly detect the rotation angle (i.e., the first rotation angle) of the driven wheel 124 from the change in the magnetic field generated when the magnet 126 rotates, and transmit the rotation angle information to the control unit 110.
Illustratively, the rotation angle information is output in the form of send. The output range of the SENT signal is 0-4095, wherein 0 corresponds to an angle of 0 degree, and 4095 corresponds to an angle of 359.9121 degrees.
The control unit 110 receives the rotation angle information from the angle detection unit 120, monitors the number of rotations, records the current angle digital information and the number of rotations, calculates the steering angle of the vehicle wheel, and transmits the related information to the input/output unit 130. Meanwhile, information of the input-output unit 130 is collected at intervals. The monitoring of the number of rotations is realized by angle digital information transmitted back by the angle detection unit 120, and when the angle digital information jumps from 4095 to 0, the angle digital information is defaulted to be a positive rotation circle and is recorded as n + 1; when the angle digital information jumps from 0 to 4095, the angle digital information defaults to a reverse turn and is recorded as n-1; n is an integer.
In other embodiments, when adopting other forms to transmit above-mentioned turned angle information, still can adopt other modes of recording the number of turns that technical staff in the field can know to record the turned angle condition, the embodiment of the utility model provides an it is no longer repeated here nor is limited.
Optionally, the hall sensor 120 further includes a housing, and the housing is provided with a mounting hole 121; the housing is fixedly mounted to the vehicle through mounting holes 121.
So set up, can make hall sensor 120's fixed mode more firm to be favorable to improving hall sensor 120 to the stability of rotation angle detection, be favorable to ensureing the higher precision of angle detection.
Optionally, the vehicle steering angle detection system 10 further includes a connection line 112, and the hall sensor 120 is communicatively connected to the control unit 110 through the connection line 112; the connection line 112 is used to transmit the first rotation angle to the control unit 110 in the form of SENT, SPI, IIC, PWM or voltage.
Therefore, the angle related information is transmitted in a wired transmission mode, so that the transmission loss is small, and the transmission accuracy is high. Meanwhile, any one of the information transmission modes can be flexibly selected, the flexibility of information transmission is high, and the vehicle-mounted intelligent vehicle can be conveniently suitable for different vehicle types and information transmission protocols.
Alternatively, the input-output unit 130 includes a touch display screen.
Therefore, the user can input information and read the information through the touch display screen, namely information interaction is realized, and the interaction mode is simple.
Alternatively, the touch Display screen includes a Liquid Crystal Display (LCD) screen or an Organic Light Emitting Diode (OLED) Display screen.
Therefore, the rotation angle information including the rotation direction and the rotation angle value can be presented to the user through the liquid crystal display screen or the organic light emitting diode display screen.
In other embodiments, the touch display screen may also be a display screen with a touch function of other types known to those skilled in the art, and the embodiment of the present invention is not limited thereto.
Optionally, the vehicle steering angle detection system 10 further includes a power supply unit 150; the regulated rectifying unit 140 is used for regulating the voltage provided by the power supply unit 150 to a preset voltage value.
In which, by voltage stabilization, the supplied power units (e.g., the control unit 110, the angle detection unit 120, and the input/output unit 130) can be ensured to work normally.
For example, the preset voltage value may be 5V/12V, or other voltage values known to those skilled in the art, and the embodiment of the present invention is not limited thereto.
Alternatively, the power supply unit 150 includes a vehicle power supply or an independent power supply.
Illustratively, the power supply voltage stabilizing and rectifying unit 140 stabilizes the input voltage of the car power supply or the independent power supply at 5V/12V for the control unit 110, the angle detection unit 120, the input/output unit 130, and other power utilization units known to those skilled in the art.
The following takes an LCD touch screen as an input/output unit, and exemplarily illustrates the working principle and the working flow of a vehicle steering angle detecting system 10 provided by an embodiment of the present invention with reference to fig. 1 to 4.
When the vehicle is initially used, the vehicleThe wheel steering angle is in the straight direction (0 degree), and the angle digital information stored in the current control unit is operated through the parameter information in the LCD touch screen operation control unit
And number of turns
Marking the information as 0 degree and storing the information in the control unit; the steering wheel is turned to the end to the left, the parameter information in the control unit is operated through the LCD touch screen, and the angle digital information stored in the current control unit is processed
And lap number information
Rated as maximum angle of left turn of wheel
And storing the data in a control unit; the steering wheel is steered to the right to the end, the parameter information in the control unit is operated through the LCD touch screen, and the angle digital information stored in the current control unit is transmitted to the control unit
And number of turns
Information is calibrated as the maximum angle of right turn
And saved to the control unit. Then, the control unit reads out the stored calibration angle, the related angle digital information and the turn number information and substitutes the information into B, A, N in the following formulas respectively to calculate the relation between the angle digital information unit transmitted back by the angle detection unit and the wheel steering angle during left and right turning
And
wherein different vehicles can be set according to their maximum wheel steering angle
And
the value of (c).
After calibration is completed, the control unit can judge the disc-making direction through angle digital information A1 sent back by the angle detection unit and the monitored number of turns N1 at any time according to a difference value D obtained by the following formula so as to select a corresponding conversion value Cx; when the difference value is negative, selecting
When the difference is positive
Then, obtaining a current angle value through a linear formula, namely the following formula; and transmitted to the LCD touch screen.
Current angle D × Cx
On this basis, the workflow may refer to fig. 4, which may include:
after the vehicle is started, the system automatically detects whether the vehicle is used for the first time.
If yes, entering a calibration interface, calibrating numerical values of 0 degree, the maximum left-turning angle and the maximum right-turning angle, storing the settings, and displaying the current turning angle; and if not, calling the angle data before the vehicle is extinguished, and displaying the angle data as the current wheel angle value.
The system continuously monitors whether input exists or not, when a recalibration requirement is detected, the calibration operation is repeated, otherwise, the calibration interface is not entered; and when the steering is detected, updating the current wheel angle data in real time to a storage unit of the system to be used as the latest wheel angle data before flameout, and displaying the latest wheel angle data. Otherwise, the operation is not carried out, and the current wheel angle value is continuously displayed.
Optionally, with continued reference to fig. 5-7, the vehicle steering angle detection system 10 further includes a prompt unit 160, the prompt unit 160 being in communication with the control unit 110; the control unit 110 is also configured to calculate a difference between the wheel steering angle and a set prompt threshold (hereinafter also simply referred to as "threshold"), and transmit prompt information to the prompt unit 160 according to the difference; the prompting unit 160 is configured to receive the prompting information and perform prompting according to the prompting information.
The prompting mode of the prompting unit 160 may include: sounding at different frequencies. For example, the prompting unit 160 may employ a buzzer; along with the change of the steering angle, the buzzer can make sounds with different frequencies, so that the prompting effect can be enhanced.
The prompt information transmitted by the control unit 110 to the prompt unit 160 can be used to drive the prompt unit 160 to present the working state changing with the change of the steering angle.
For example, the prompting information sent by the control unit 110 to the prompting unit 160 may be a level signal associated with the steering angle, and may include a high level signal or a low level signal. Namely: the level signal sent by the control unit 110 to the prompting unit 160 is determined according to the difference obtained by comparing the current steering angle of the automobile wheels with the set prompting threshold, and when the steering angle of the automobile wheels is not higher than the threshold, a low level signal is sent all the time, and at this time, the buzzer does not make a sound; when the steering angle of the automobile wheels is higher than a threshold value, a high-level signal is intermittently sent, and the buzzer makes a sound intermittently; further, the larger the difference, the smaller the time interval, and the more frequent the sound.
The following takes an LCD touch screen as an input/output unit, and with reference to fig. 5 to 7, the working principle and the working flow of another vehicle steering angle detecting system 10 provided by the embodiment of the present invention are exemplarily described.
The operating principle of the vehicle steering angle detection system 10 is similar to that of the vehicle steering angle detection system 10 based on fig. 1-4 shown above, except that:
and when the current angle value is transmitted to the LCD touch screen, the control unit compares the current angle value with a set prompt threshold theta to obtain a difference value. Wherein, the prompting threshold value theta has two set values which are respectively left-turning
And turn right
When the above difference is negative, θ is
When the difference is positive, θ is
When the voltage is not greater than 0, the control unit sends a low level to the prompting unit all the time, and the prompting unit does not work.
When the angle is larger than 0, the control unit intermittently sends a driving level to the prompting unit by taking the set time S as a unit according to the size of the angle so as to enable the prompting unit to intermittently send out a 'dripping' prompting sound; and, the larger the difference is, the shorter the interval time of the prompting sound is, and the more rapid the sound is.
On this basis, the workflow may refer to fig. 7, which may include:
after the vehicle is started, the system automatically detects whether the vehicle is used for the first time.
If yes, entering a calibration interface, calibrating numerical values of 0 degree, the maximum left-turning angle and the maximum right-turning angle, storing the settings, and displaying the current turning angle; and if not, calling the angle data before the vehicle is extinguished, and displaying the angle data as the current wheel angle value. Meanwhile, whether the angle value exceeds a set prompting threshold value is judged, if yes, a prompting sound is sent out, and otherwise, no operation is carried out.
The system continuously monitors whether input exists or not, and when the requirement for setting the prompt parameters is detected, the system enters a prompt parameter setting interface to set a prompt threshold value
And prompting the unit time S, otherwise, not entering a prompting parameter setting interface. When a recalibration requirement is detected, repeating the calibration operation, otherwise, not entering a calibration interface; and when the steering is detected, updating the current wheel angle data in real time to a storage unit of the system to be used as the latest wheel angle data before flameout, and displaying the latest wheel angle data. Otherwise, the operation is not carried out, the current wheel angle value is continuously displayed, and whether the prompt operation is executed or not is judged.
The embodiment of the utility model provides a reliable, accurate, visual vehicle steering angle detecting system, it has powerful compatibility, makes different drivers also enjoy safe, simple and easy operation on different vehicles; meanwhile, the input and output unit can be used for adjusting relevant parameters according to requirements and transmitting the parameters to the control unit.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A vehicle steering angle detection system is characterized by comprising a control unit, an angle detection unit, an input/output unit and a voltage-stabilizing rectification unit;
the voltage-stabilizing rectifying unit is used for supplying power to the control unit, the angle detection unit and the input/output unit; the angle detection unit is used for detecting a first rotation angle based on the Hall sensor; the control unit is used for calculating the wheel steering angle of the vehicle according to the first rotation angle and transmitting the wheel steering angle to the input and output unit; the input and output unit is used for outputting the steering angle of the wheels.
2. The vehicle steering angle detection system according to claim 1, characterized in that the hall sensor includes a two-axis hall sensor or a three-axis hall sensor.
3. The vehicle steering angle detection system according to claim 2, wherein the hall sensor includes a driving wheel, a driven wheel, a magnet, and an induction circuit;
the steering gear comprises a driving wheel, a steering gear rotating shaft and a steering gear, wherein the driving wheel is fixed with the steering gear rotating shaft of the vehicle, and the steering gear rotating shaft drives the driving wheel to rotate synchronously; the driven wheel is connected with the driving wheel in a sawtooth meshed mode, the magnet is fixed to one side, facing the sensing circuit, of the driven wheel, and the magnet rotates along with the driven wheel.
4. The vehicle steering angle detection system according to claim 3, wherein the hall sensor further comprises a housing, the housing being provided with a mounting hole;
the shell is fixedly installed with the vehicle through the installation hole.
5. The vehicle steering angle detection system according to claim 1, characterized by further comprising a connection line, through which the hall sensor is communicatively connected with the control unit;
the connecting line is used for transmitting the first rotation angle to the control unit in the form of SENT, SPI, IIC, PWM or voltage.
6. The vehicle steering angle detection system according to claim 1, wherein the input-output unit includes a touch display screen.
7. The vehicle steering angle detection system of claim 6, wherein the touch display screen comprises an LCD screen or an OLED display screen.
8. The vehicle steering angle detection system according to claim 1, characterized by further comprising a power supply unit;
the voltage stabilizing and rectifying unit is used for stabilizing the voltage provided by the power supply unit to a preset voltage value.
9. The vehicle steering angle detection system according to claim 8, characterized in that the power supply unit includes a vehicle power supply or an independent power supply.
10. The vehicle steering angle detection system according to claim 1, further comprising a prompting unit that is in communication connection with the control unit;
the control unit is also used for calculating a difference value between the wheel steering angle and a set prompt threshold value and transmitting prompt information to the prompt unit according to the difference value;
the prompting unit is used for receiving prompting information and prompting according to the prompting information.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113548111A (en) * | 2021-08-16 | 2021-10-26 | 合肥工业大学 | Steering wheel steering judgment and corner calculation method for tracked vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113548111A (en) * | 2021-08-16 | 2021-10-26 | 合肥工业大学 | Steering wheel steering judgment and corner calculation method for tracked vehicle |
| CN113548111B (en) * | 2021-08-16 | 2022-04-26 | 合肥工业大学 | Steering wheel steering judgment and corner calculation method for tracked vehicle |
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