CN211918807U - Steering wheel and control circuit thereof, and automobile - Google Patents
Steering wheel and control circuit thereof, and automobile Download PDFInfo
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- CN211918807U CN211918807U CN202020283249.9U CN202020283249U CN211918807U CN 211918807 U CN211918807 U CN 211918807U CN 202020283249 U CN202020283249 U CN 202020283249U CN 211918807 U CN211918807 U CN 211918807U
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Abstract
The utility model provides a steering wheel and control circuit, car thereof. The control circuit comprises a control module, a touch force detection module and a plurality of key modules comprising touch detection units and key vibration units; the touch detection unit is used for detecting the occurrence of touch operation and sending a trigger signal to the control module when the touch operation occurs; the touch force detection module is used for detecting and sending touch force generated by touch operation to the control module; the control module is used for determining a key vibration unit corresponding to touch operation according to the trigger signal and sending a first or second driving signal to the determined key vibration unit according to whether the touch force is smaller than a preset threshold value; the key vibration unit is used for vibrating according to first or second driving signals respectively corresponding to different vibration waveforms. The utility model discloses can divide the touching operation to the touching operation of button into and press the operation to can realize the different vibration feedback to different touching operations.
Description
Technical Field
The utility model relates to the field of automotive technology, in particular to steering wheel and control circuit, car thereof.
Background
The steering wheel is the most important input device of an automobile steering system, specifically, an automobile driver controls automobile steering through the steering wheel so as to realize control of behaviors of advancing, turning, backing and the like of an automobile, and along with the increasing popularity of driving assistance systems and the increasing complexity of information entertainment systems, the traditional steering wheel with a single function cannot meet the requirements of the driver, and the steering wheel slowly integrates some functions which are triggered based on keys and are convenient for the automobile driver to use, such as telephone answering, volume control and the like. The traditional steering wheel key function is realized based on resistance voltage division, a pressed key can be determined according to a fed-back voltage value, but the expandability of the steering wheel key function is not strong, and various vibration feedback of the key cannot be realized.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a steering wheel and control circuit, car in order to overcome the defect that multiple vibration feedback can't be realized to steering wheel button function among the prior art.
The utility model discloses an above-mentioned technical problem is solved through following technical scheme:
a control circuit of a steering wheel comprises a control module, a touch force detection module and a plurality of key modules, wherein the touch force detection module and the key modules are respectively electrically connected with the control module;
the touch detection unit is used for detecting the occurrence of touch operation and sending a trigger signal to the control module when the touch operation occurs;
the touch force detection module is used for detecting and sending the touch force generated by the touch operation to the control module;
the control module is used for determining a key vibration unit corresponding to the touch operation according to the trigger signal, sending a first driving signal to the determined key vibration unit when the touch force is smaller than a preset threshold value, and sending a second driving signal to the determined key vibration unit when the touch force is not smaller than the preset threshold value;
the key vibration unit is used for vibrating according to the first driving signal or the second driving signal;
the first driving signal and the second driving signal correspond to different vibration waveforms respectively.
Preferably, the control module is specifically configured to determine a pressing level corresponding to the touch strength, and determine a second driving signal to be sent according to the determined pressing level;
wherein the second drive signals determined by different pressing levels correspond to different vibration waveforms;
and/or the presence of a gas in the gas,
the control module comprises a digital-to-analog conversion circuit, and the key vibration unit comprises a driving circuit;
the digital-to-analog conversion circuit is used for outputting a vibration waveform;
the driving circuit is used for adjusting the driving capability of the vibration waveform;
and/or the presence of a gas in the gas,
the touch detection unit comprises a capacitance sensor, and the touch force detection module comprises an infrared sensor;
and/or the presence of a gas in the gas,
the key module also comprises a backlight display unit;
the control module is further used for sending a third driving signal to a backlight display unit corresponding to the touch operation according to the trigger signal;
the backlight display unit is used for lighting according to the third driving signal.
Preferably, the control circuit further comprises a hands-off detection module electrically connected with the control module;
the hands-off detection module is used for sending a value-containing signal of the steering wheel to the control module;
the control module is also used for generating an alarm signal when the hand-off event is determined to occur according to the volume value signal.
Preferably, the control circuit further comprises a steering wheel vibration module electrically connected with the control module;
the control module is further used for sending a fourth driving signal to the steering wheel vibration module;
the steering wheel vibration module is used for vibrating according to the fourth driving signal.
Preferably, the control circuit further comprises a temperature detection module and a heating module which are respectively electrically connected with the control module;
the temperature detection module is also used for sending a temperature signal of the steering wheel to the control module;
the control module is used for sending a fifth driving signal to the heating module according to the temperature signal;
the heating module is used for heating according to the fifth driving signal.
Preferably, the control circuit further comprises a steering wheel indicator light module electrically connected with the control module;
the control circuit is also used for sending a sixth driving signal to the steering wheel indicator lamp module;
and the steering wheel indicator lamp module is used for being lightened according to the sixth driving signal.
Preferably, the control module is specifically configured to determine a key module that is touched according to the trigger signal, and determine a sixth driving signal sent to the steering wheel indicator light module according to the determined key module when the touch strength is not less than the preset threshold;
the sixth driving signals determined by different key modules correspond to different signal waveforms, and the signal waveforms are used for determining the color and/or brightness of the lighting of the steering wheel indicator light module.
Preferably, the control module communicates with a central control system of the vehicle including the steering wheel according to a Local Interconnect Network (LIN) protocol;
and/or the presence of a gas in the gas,
the control module supports at least one communication protocol of SPI (Serial Peripheral Interface), IIC (Inter-Integrated Circuit bus) and ISELED (solution for vehicle-mounted LED);
and/or the presence of a gas in the gas,
the control circuit further comprises a power supply module for supplying power to other modules in the control circuit.
A steering wheel comprising a control circuit for a steering wheel as claimed in any one of the preceding claims.
An automobile comprising any of the steering wheels described above.
The utility model discloses an actively advance the effect and lie in: the utility model discloses an aspect detects the button module who takes place touch operation, and on the other hand detects the touching dynamics of touch operation to can divide into touch operation and press down the operation with the touch operation to the button, and can send different drive signals to the button vibration unit that the button module who takes place touch operation includes according to the difference of touch operation, thereby realized the different vibration feedback to different touch operations. And have, the utility model discloses cooperate peripheral circuit on single control module's basis, integrated more functions in finite space, saved development cost, in addition the utility model discloses a on the basis, only need establish an engineering, know and dispose a host system, reduced further software development's the degree of difficulty.
Drawings
Fig. 1 is a block diagram of a control circuit of a steering wheel according to embodiment 1 of the present invention.
Detailed Description
The present invention will be more clearly and completely described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the control circuit of this embodiment includes a control module 1, and a plurality of key modules 2 respectively electrically connected to the control module 1, a touch force detection module 3, a hand-off detection module 4, a steering wheel vibration module 5, a temperature detection module 6, a heating module 7, a steering wheel indicator light module 8, and a power module 9.
In this embodiment, the power module 9 is configured to supply power to other modules (including the control module 1, the key module 2, the touch strength detection module 3, the hands-off detection module 4, the steering wheel vibration module 5, the temperature detection module 6, the heating module 7, the steering wheel indicator light module 8, and the like) in the control circuit of this embodiment, and specifically, the power module 9 may be a DC (Direct Current)/DC power supply, and may be configured to convert a vehicle-mounted high-voltage Direct Current power supply into a low-voltage Direct Current power supply suitable for being used by a steering wheel.
In the present embodiment, the key module 2 may be implemented based on the CapSense (capacitive touch sensing technology), so that the implementation thereof may depend on less peripheral components, and referring to fig. 1, the key module 2 may include a touch detection unit 21, a key vibration unit 22, and a backlight display unit 23, which are respectively electrically connected to the control module 1.
In the present embodiment, the touch detection unit 21 is configured to detect occurrence of a touch operation and send a trigger signal to the control module 1 when the touch operation occurs. Specifically, the touch detection unit 21 may include a capacitance sensor, so that when the capacitance change caused by the finger touching the key is detected and the touched specific key module can be identified, the key vibration unit 22 for implementing the key touch feedback can be identified. Furthermore, in the present embodiment, the touch detection unit 21 may also be electrically connected to the control module 1 via a touch detection connector.
In this embodiment, the touch strength detection module 3 may perform data interaction with the control module 1 through the IIC, and the touch strength detection module 3 is configured to detect and send the touch strength generated by the touch operation to the control module 1. Specifically, the touch strength detection module 3 may include an infrared sensor, so as to detect a small deformation amount generated when the finger touches the key, and further detect a distance change between the key surface and the circuit board, wherein the deformation amount may be used to determine the magnitude of the touch strength.
In this embodiment, the control module 1 may determine the key vibration unit 22 corresponding to the touch operation according to the received trigger signal, that is, determine the key vibration unit 22 included in the key module 2 having the touch operation. In this embodiment, the control module 1 may perform data interaction with the key vibration unit 22 through the IIC, and specifically, the control module 1 is configured to send a first driving signal to the determined key vibration unit 22 when the touch strength is less than a preset threshold, and send a second driving signal to the determined key vibration unit 22 when the touch strength is not less than the preset threshold.
The preset threshold value can be set according to practical application self-definition, when the touch force is smaller than the preset threshold value, the touch operation can be determined to be touch operation, and when the touch force is not smaller than the preset threshold value, the touch operation can be determined to be press operation, so that the specific touch operation is divided into the touch operation which is touched lightly and the press operation which is touched with a certain force. In addition, in the present embodiment, the first driving signal and the second driving signal correspond to different vibration waveforms, respectively, wherein the difference between the vibration waveforms may be embodied in terms of shape, frequency, amplitude, and the like.
In the present embodiment, the key vibration unit 22 is configured to vibrate according to the first drive signal or the second drive signal, so that two-stage vibration feedback based on the touch operation and the press operation can be realized. Specifically, the control module 1 may include a digital-to-analog conversion circuit for outputting a vibration waveform, and the key vibration unit 22 may include a driving circuit (e.g., a Haptic Driver IC) for adjusting a driving capability of the vibration waveform output by the digital-to-analog conversion circuit, so that the present embodiment may customize the vibration waveform for driving the key vibration unit 22 according to actual applications to realize different key vibration handfeels.
Further, in this embodiment, the control module 1 may be specifically configured to determine the touch force, and further, the touch force is not less than a preset threshold, and the corresponding pressing level is determined according to the determined pressing level, and the second driving signal is determined to be specifically sent, wherein the pressing level is divided according to a user-defined setting of an actual application, and the second driving signals determined by different pressing levels correspond to different vibration waveforms, so that multi-level, and finer key vibration feedback can be implemented for key touch, and the experience of a car driver can be improved.
In this embodiment, the control module 1 may be further configured to send a third driving signal to the backlight display unit 23 corresponding to the touch operation according to the trigger signal, that is, the backlight display unit 23 included in the key module 2 where the touch operation occurs. The backlight display unit 23 may be configured to light up according to a third driving signal, wherein the adjusting of the backlight brightness of the backlight display unit 23 may be achieved by adjusting the third driving signal.
In this embodiment, the control module 1 may be further configured to send a fourth driving signal to the steering wheel vibration module 5, and the steering wheel vibration module 5 may be configured to vibrate according to the fourth driving signal to cause the vibration of the steering wheel, so as to distinguish the vibration of the key module 2 caused by the key vibration unit 22. In this embodiment, the fourth driving signal may be a PWM (Pulse Width Modulation) signal, and the steering wheel vibration module 5 may include a vibration motor, and specifically, the control module 1 may output a PWM signal with a certain frequency and amplitude to the vibration motor via the high-side driving chip to drive the vibration motor to vibrate, where the adjustment of the vibration intensity of the steering wheel vibration module 5 may be achieved by adjusting a duty ratio of the PWM signal.
In this embodiment, the Hands-Off Detection (HOD) module 4 may employ a volume Detection chip and may perform data interaction with the control module 1 through the SPI, and specifically, when the Hands-Off Detection module 4 is driven, the volume Detection chip may send a volume signal of a steering wheel (wrapping material) to the control module 1, where the volume signal may be used to indicate a change in volume of the steering wheel caused by a driver holding the steering wheel, and the control module 1 may be further configured to determine whether a Hands-Off event occurs according to the volume signal, that is, whether a driver's Hands leave the steering wheel, and is configured to generate an alarm signal when the Hands-Off event occurs according to the volume signal.
Further, in this embodiment, the control module 1 may also communicate with the central control system of the vehicle including this embodiment according to the LIN protocol, so that the generated alarm signal may be fed back to the central control system of the vehicle, and further an alarm may be implemented at the vehicle side to remind the driver to put his hand back on the steering wheel.
In addition, in the present embodiment, when the central control system detects that the driver does not look straight ahead for a long time based on the technology of eye tracking, etc., a signal may be sent to the control module 1 to trigger the control module 1 to send a fourth driving signal to the steering wheel vibration module 5 to cause the vibration of the steering wheel, so as to remind the driver to put the hand back on the steering wheel.
In this embodiment, the control module 1 may specifically send the fourth driving signal to the steering wheel vibration module 5 directly to cause the steering wheel to vibrate when determining that the hands-off event occurs, so as to remind the driver to put the hands back on the steering wheel.
In this embodiment, the temperature detection module 6 may be configured to send a temperature signal of the steering wheel to the control module 1, and specifically, the temperature detection module 6 may include a pull-up resistor and a thermistor disposed in the steering wheel, so that a temperature value of the steering wheel may be converted into a voltage value corresponding to the temperature value, and sent to the control module 1 in the form of a temperature signal, so that the control module 1 may determine the temperature of the steering wheel according to the voltage value in the temperature signal.
In this embodiment, the control module 1 may be further configured to send a fifth driving signal to the heating module 7 according to the received temperature signal, so as to drive the heating module 7 to heat the steering wheel according to the fifth driving signal. In this embodiment, the heating module 7 may include an electrical heating material (e.g., a thermal resistance wire) disposed in the steering wheel, the fifth driving signal may be a PWM signal, and specifically, the control module 1 may output the PWM signal to the heating module via a high-side driving chip with a large current to drive the heating module to heat, wherein the on-off time of the high-side driving chip may be controlled by adjusting a duty ratio of the PWM signal, so as to adjust the heating speed and the heating temperature of the heating module 7.
In this embodiment, the control module 1 may be further configured to send a sixth driving signal to the steering wheel indicator module 8, so as to drive the steering wheel indicator module 8 to light according to the sixth driving signal, where the steering wheel indicator module 8 may include a light bar that is disposed on the steering wheel and is distinguished from the backlight display unit 23 included in the key module 2, and may further include a light bead that is disposed near the control module 1, and the sixth driving signal that is sent by the control module 1 and has a higher communication frequency and cannot be transmitted in a long distance may become a differential signal that can be transmitted in a long distance after passing through the light bead, and then be transmitted to the light bar. Specifically, the control module 1 may perform data interaction with the steering wheel indicator module 8 according to the ISELED, and the steering wheel indicator module 8 may specifically include a Light bar formed by a three-color LED (Light Emitting Diode), and the color and brightness of the three-color LED may be adjusted by adjusting the sixth driving signal.
In this embodiment, the control module 1 may be specifically configured to determine the key module 2 that is touched according to the trigger signal, for example, a left steering key, a right steering key, a heating key, and the like, and then determine a sixth driving signal sent to the steering wheel indicator module 8 according to the determined key module 2, where the sixth driving signal determined by different key modules corresponds to different signal waveforms, and the adjustment of the color and the brightness of the lighting of the steering wheel indicator module 8 may be implemented by adjusting the signal waveforms. For example, when a left turn button is pressed, the three-color LED may be driven to display green and sequentially lit from right to left to implement a water lamp function. For example, when the right steering key is pressed, the three-color LED may be driven to display green and sequentially lit from left to right to implement the water lamp function. For another example, when the heating key is pressed, the three-color LED can be driven to display orange yellow, and a breathing lamp function of cyclically changing from light to dark and then from dark to light can be realized.
The control circuit of the present embodiment may further include a main connector used as an interface between the steering wheel and the central control system of the vehicle, so as to enable the vehicle-mounted power supply to supply power to the control circuit of the present embodiment and enable the control circuit of the present embodiment to communicate with the central control system of the vehicle, and specifically, in the present embodiment, the hands-off detection module 4, the steering wheel vibration module 5, the temperature detection module 6, the heating module 7, the steering wheel indicator light module 8, and the power supply module 9 may all be connected to the main connector.
This embodiment detects the button module that takes place touch operation on the one hand, and on the other hand detects the touch dynamics of touch operation to can divide into touch operation and press down the operation to the touch operation of button, and can send different drive signals to the button vibration unit that the button module that takes place touch operation includes according to the difference of touch operation, thereby realized the different vibration feedback to different touch operations.
Further, the control circuit integrated level that this embodiment provided is higher, the space to the steering wheel occupies less, thereby can be applicable to the more steering wheel of button module, specifically, this embodiment cooperates peripheral circuit on single control module's basis, the control circuit that has realized collecting touch function, button vibration feedback function, steering wheel heating function, three-color lamp drive function, HOD function and steering wheel vibration function equal an organic whole, can improve the problem that the installation space that can lead to owing to placing air bag etc. in the steering wheel is nervous to bring greatly, more functions have been integrated in the finite space, can also practice thrift development cost. Furthermore, on the basis of the utility model, only need establish an engineering, know and dispose a host system, reduced the degree of difficulty of further software development.
Example 2
The present embodiment provides a steering wheel on the basis of embodiment 1, and specifically, the steering wheel of the present embodiment includes the control circuit of the steering wheel provided in embodiment 1.
On the basis of embodiment 1, the steering wheel of this embodiment avoids occupying its inner space because the integrated level of internal control circuit is higher, in addition, has still integrated touch function, button vibration feedback function, steering wheel heating function, tristimulus lamp drive function, HOD function and steering wheel vibration function etc. are favorable to promoting motorist's experience and feel.
Example 3
The embodiment provides an automobile on the basis of the embodiment 2, and particularly provides a steering wheel in the automobile embodiment 2 of the embodiment.
On the basis of embodiment 2, the automobile of this embodiment is favorable to promoting motorist's experience because the steering wheel has integrateed touch function, button vibration feedback function, steering wheel heating function, tristimulus lamp drive function, HOD function and steering wheel vibration function etc..
Claims (10)
1. A control circuit of a steering wheel is characterized by comprising a control module, a touch force detection module and a plurality of key modules, wherein the touch force detection module and the key modules are respectively electrically connected with the control module;
the touch detection unit is used for detecting the occurrence of touch operation and sending a trigger signal to the control module when the touch operation occurs;
the touch force detection module is used for detecting and sending the touch force generated by the touch operation to the control module;
the control module is used for determining a key vibration unit corresponding to the touch operation according to the trigger signal, sending a first driving signal to the determined key vibration unit when the touch force is smaller than a preset threshold value, and sending a second driving signal to the determined key vibration unit when the touch force is not smaller than the preset threshold value;
the key vibration unit is used for vibrating according to the first driving signal or the second driving signal;
the first driving signal and the second driving signal correspond to different vibration waveforms respectively.
2. The control circuit of the steering wheel according to claim 1, wherein the control module is specifically configured to determine a pressing level corresponding to the touch strength, and determine the transmitted second driving signal according to the determined pressing level;
wherein the second drive signals determined by different pressing levels correspond to different vibration waveforms;
and/or the presence of a gas in the gas,
the control module comprises a digital-to-analog conversion circuit, and the key vibration unit comprises a driving circuit;
the digital-to-analog conversion circuit is used for outputting a vibration waveform;
the driving circuit is used for adjusting the driving capability of the vibration waveform;
and/or the presence of a gas in the gas,
the touch detection unit comprises a capacitance sensor, and the touch force detection module comprises an infrared sensor;
and/or the presence of a gas in the gas,
the key module also comprises a backlight display unit;
the control module is further used for sending a third driving signal to a backlight display unit corresponding to the touch operation according to the trigger signal;
the backlight display unit is used for lighting according to the third driving signal.
3. The control circuit for a steering wheel according to claim 1, wherein the control circuit further comprises a hands-off detection module electrically connected to the control module;
the hands-off detection module is used for sending a value-containing signal of the steering wheel to the control module;
the control module is also used for generating an alarm signal when the hand-off event is determined to occur according to the volume value signal.
4. The control circuit for a steering wheel according to claim 1, wherein the control circuit further comprises a steering wheel vibration module electrically connected to the control module;
the control module is further used for sending a fourth driving signal to the steering wheel vibration module;
the steering wheel vibration module is used for vibrating according to the fourth driving signal.
5. The control circuit of a steering wheel according to claim 1, further comprising a temperature detection module and a heating module electrically connected to the control module, respectively;
the temperature detection module is used for sending a temperature signal of the steering wheel to the control module;
the control module is further used for sending a fifth driving signal to the heating module according to the temperature signal;
the heating module is used for heating according to the fifth driving signal.
6. The control circuit for a steering wheel according to claim 1, wherein the control circuit further comprises a steering wheel indicator light module electrically connected to the control module;
the control circuit is also used for sending a sixth driving signal to the steering wheel indicator lamp module;
and the steering wheel indicator lamp module is used for being lightened according to the sixth driving signal.
7. The control circuit of the steering wheel according to claim 6, wherein the control module is specifically configured to determine a key module that is touched according to the trigger signal, and determine a sixth driving signal sent to the indicator light module of the steering wheel according to the determined key module when the touch strength is not less than the preset threshold;
the sixth driving signals determined by different key modules correspond to different signal waveforms, and the signal waveforms are used for determining the color and/or brightness of the lighting of the steering wheel indicator light module.
8. The control circuit for a steering wheel according to claim 1, wherein the control module communicates with a central control system of a vehicle including the steering wheel according to a LIN protocol;
and/or the presence of a gas in the gas,
the control module supports at least one communication protocol of SPI, IIC and ISELED;
and/or the presence of a gas in the gas,
the control circuit further comprises a power supply module for supplying power to other modules in the control circuit.
9. A steering wheel characterized in that it comprises a control circuit of a steering wheel according to any of claims 1-8.
10. An automobile, characterized in that the automobile comprises a steering wheel according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020283249.9U CN211918807U (en) | 2020-03-09 | 2020-03-09 | Steering wheel and control circuit thereof, and automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020283249.9U CN211918807U (en) | 2020-03-09 | 2020-03-09 | Steering wheel and control circuit thereof, and automobile |
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| CN211918807U true CN211918807U (en) | 2020-11-13 |
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| CN202020283249.9U Active CN211918807U (en) | 2020-03-09 | 2020-03-09 | Steering wheel and control circuit thereof, and automobile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477973A (en) * | 2021-01-13 | 2021-03-12 | 江苏泰协智能科技有限公司 | Automobile steering wheel HOD, heating and vibration three-in-one module |
| CN113873692A (en) * | 2021-02-03 | 2021-12-31 | 江苏泰协智能科技有限公司 | Independent output shutoff protection function two-in-one heating system under fault state |
| CN115140148A (en) * | 2022-06-24 | 2022-10-04 | 东风柳州汽车有限公司 | Touch control type steering wheel |
-
2020
- 2020-03-09 CN CN202020283249.9U patent/CN211918807U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477973A (en) * | 2021-01-13 | 2021-03-12 | 江苏泰协智能科技有限公司 | Automobile steering wheel HOD, heating and vibration three-in-one module |
| CN113873692A (en) * | 2021-02-03 | 2021-12-31 | 江苏泰协智能科技有限公司 | Independent output shutoff protection function two-in-one heating system under fault state |
| CN113873692B (en) * | 2021-02-03 | 2024-04-12 | 江苏佳诚智能科技有限公司 | Independent output and shutdown protection function two-in-one heating system under fault state |
| CN115140148A (en) * | 2022-06-24 | 2022-10-04 | 东风柳州汽车有限公司 | Touch control type steering wheel |
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