CN113391574A - Control system of vehicle-mounted screen and switching method thereof - Google Patents
Control system of vehicle-mounted screen and switching method thereof Download PDFInfo
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- CN113391574A CN113391574A CN202010175479.8A CN202010175479A CN113391574A CN 113391574 A CN113391574 A CN 113391574A CN 202010175479 A CN202010175479 A CN 202010175479A CN 113391574 A CN113391574 A CN 113391574A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Abstract
A control system of a vehicle-mounted screen and a switching method thereof are provided, the control system of the vehicle-mounted screen comprises a global positioning system, an inertial sensor and a control circuit, the global positioning system detects satellite signals from satellites, the inertial sensor senses vehicle-mounted motion and correspondingly generates motion state values, the control circuit executes a first judgment program or a second judgment program according to the states of the satellite signals, when the first judgment program is executed, the control circuit calculates vehicle-mounted speed according to the satellite signals, and selectively locks the vehicle-mounted screen according to the vehicle speed, when the second judgment program is executed, the control circuit generates a movement signal according to the motion state values, and selectively locks the vehicle-mounted screen according to the movement signal. By utilizing the control system of the vehicle-mounted screen and the switching method thereof, the driving safety can be effectively ensured even under the condition of poor satellite signals.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a control technology of an electronic device for a vehicle, in particular to a vehicle-mounted screen control system and a switching method thereof.
[ background of the invention ]
In order to provide communication between a driver and an intelligent vehicle, the vehicle usually combines various electronic devices for providing various functions, such as: satellite navigation, vehicle condition provision, video playback, instant messaging, and the like. However, diversified functions or interactions often need to be achieved through the in-vehicle screen.
In order to provide better controllability for the vehicular electronic device, the vehicular screen further provides a touch function in addition to the display function, so as to achieve better performance.
[ summary of the invention ]
However, the driver may be distracted when viewing or operating the on-vehicle screen, increasing the chances of a traffic accident occurring. In view of the above, the present invention provides a control system for a vehicle-mounted screen and a switching method thereof, so as to avoid the driver from being distracted by operating or watching the screen when the vehicle-mounted speed is too fast.
In some embodiments, the method for switching the on-vehicle screen includes detecting at least one satellite signal from at least one satellite, executing a first determination procedure or a second determination procedure according to a state of the at least one satellite signal, calculating a vehicle speed according to the at least one satellite signal when the first determination procedure is executed, and selectively locking the on-vehicle screen according to the vehicle speed, and generating a movement signal by using an inertial sensor of the on-vehicle when the second determination procedure is executed, and selectively locking the on-vehicle screen according to the movement signal.
In some embodiments, a control system for an in-vehicle screen includes a global positioning system, an inertial sensor, and a control circuit. The global positioning system is used for detecting at least one satellite signal from at least one satellite. The inertial sensor is used for sensing vehicle-mounted motion and correspondingly generating at least one motion state value. The control circuit is coupled with the global positioning system and the inertial sensor. The control circuit is used for executing a first judgment program or a second judgment program according to the state of at least one satellite signal. When the first judgment program is executed, the control circuit calculates the vehicle-mounted speed according to at least one satellite signal and selectively locks the vehicle-mounted screen according to the vehicle speed. When the second judgment program is executed, the control circuit generates a moving signal according to the at least one motion state value and selectively locks the vehicle-mounted screen according to the moving signal.
In summary, in the control system and the switching method of the vehicle-mounted screen according to any embodiment, the vehicle speed can be detected by different determination procedures according to the vehicle-mounted driving environment and the screen can be automatically locked at a proper time according to the vehicle-mounted driving environment switching determination mechanism, so as to effectively ensure driving safety.
[ description of the drawings ]
Fig. 1 is a block diagram of an on-vehicle screen control system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the in-vehicle screen control system of fig. 1 applied to a vehicle.
Fig. 3 is a flowchart of a method for switching a vehicle-mounted screen according to an embodiment of the present invention.
FIG. 4 is a detailed flowchart of an exemplary step S11-S13 shown in FIG. 3.
Fig. 5 is a detailed flowchart of an exemplary step S122 in fig. 4.
Fig. 6 is a detailed flowchart of an exemplary step S131-132 in fig. 4.
[ detailed description ] embodiments
Referring to fig. 1, in some embodiments, an in-vehicle screen control system 20 includes a global positioning system 21, an inertial sensor 23, and a control circuit 22. The in-vehicle screen control system 20 is connected to a screen 30. The control circuit 22 is coupled to the global positioning system 21, the inertial sensor 23 and the screen 30.
Referring to fig. 2, in some examples, the on-vehicle screen control system 20 may be applied to an on-vehicle. Among these, the vehicle may be a variety of vehicles 10. In an example, the on-board screen control system 20 may be implemented by a vehicle electronic device built into the vehicle 10 itself. In other words, the global positioning system 21, the inertial sensor 23, and the control circuit 22 are disposed on the vehicle 10 itself. For example, the global positioning system 21, the inertial sensor 23 and the control circuit 22 may be implemented by an On Board Unit (OBU) on the vehicle 10. The screen 30 may be a built-in screen on the dashboard or interior of the vehicle 10, as shown in fig. 2.
In other examples, the on-board screen control system 20 may be implemented by a portable electronic device disposed on the vehicle 10. In other words, the gps 21, the inertial sensor 23 and the control circuit 22 are disposed on the portable electronic device. In this case, the screen 30 may be a screen of a portable electronic device or an embedded screen on a dashboard or a built-in of the vehicle 10. For example, the global positioning system 21, the inertial sensor 23, the control circuit 22 and the screen 30 may be corresponding modules of the portable electronic device. In this way, the portable electronic device can be selectively powered by the vehicle 10. In another example, the gps 21, the inertial sensor 23 and the control circuit 22 may be corresponding modules of the portable electronic device, and the screen 30 is an embedded screen of the vehicle 10 itself. Here, the portable electronic device may be electrically connected to the on-board unit of the vehicle 10, so that the portable electronic device can timely generate a control signal to the on-board unit of the vehicle 10 to control the on-board unit to lock the embedded screen of the vehicle 10.
In another example, the on-board screen control system 20 can also be implemented by the vehicle 10 and a portable electronic device disposed on the vehicle 10. In other words, at least one of the global positioning system 21, the inertial sensor 23 and the control circuit 22 is disposed on the portable electronic device, and the rest of the global positioning system 21, the inertial sensor 23 and the control circuit 22 is disposed on the vehicle 10 itself. In this case, the screen 30 may be a screen of a portable electronic device or an embedded screen on a dashboard or a built-in of the vehicle 10. For example, the gps 21 and the control circuit 22 may be corresponding modules of the portable electronic device, and the inertial sensor 23 and the screen 30 are corresponding modules of the vehicle 10. The portable electronic device can be electrically connected to the on-board unit of the vehicle 10 to read the inertial sensor 23 configured in the vehicle 10 and timely lock the embedded screen of the vehicle 10.
The portable electronic device may be, for example, a car navigation device, a smart phone, or a tablet computer, and is not limited to the above examples.
Referring to fig. 3, in the method for switching the on-board screen control System 20, first, a Global Positioning System (GPS) 21 is used to detect at least one satellite signal from at least one satellite (step S10). In some embodiments, the satellite referred to in the present specification may be a GPS satellite in the united states, a GlONASS satellite in russia, a Galileo satellite in the european union, or a beidou satellite in china, and is not limited to the above examples.
Next, the control circuit 22 receives the satellite signal delivered by the global positioning system 21, and executes the first determination procedure or the second determination procedure according to the state of the satellite signal (step S11). For example, the first determining procedure or the second determining procedure is executed according to the information of the NMEA code (National Marine Electronics Association) of the satellite and the validity thereof.
When the control circuit 22 determines that the first determination routine has to be executed, the control circuit 22 calculates the vehicle speed on the vehicle from the satellite signal and selects whether to lock the screen 30 on the vehicle or not according to the vehicle speed (step S12). That is, when the control circuit 22 determines that the vehicle speed is too fast, for example, the vehicle speed exceeds 20km/S, the on-board screen 30 is locked, so as to avoid the danger caused by the driver operating or watching the on-board screen 30 while driving at a high speed. In some embodiments, the state of the satellite signal includes the strength of the satellite signal, the number of satellites received, and the like.
When the control circuit 22 determines that the second determination process has to be executed, the control circuit 22 receives at least one motion state value generated by the inertial sensor 23 on the vehicle, generates a movement signal according to the received motion state value, and selects whether to lock the screen 30 on the vehicle according to the movement signal (step S13). That is, when the satellite signal is not good and the correct or possible misjudgment of the vehicle speed cannot be obtained, the control circuit 22 will adopt the second judgment procedure to judge the vehicle speed by using the information other than the satellite signal to determine whether the screen 30 needs to be locked. In some embodiments, the inertial sensor 23 is configured to sense motion of the vehicle and generate a motion state value in response thereto. Here, the motion state value refers to one or more of values of the motion state of the vehicle measured by the inertial sensor 23.
Thus, the on-board screen control system 20 can avoid the influence of the situation of the high-rise shielding, the climate, the satellite damage, etc., which can not determine the vehicle speed or misdetermine the vehicle speed.
In some embodiments, the state of the satellite signal includes the number of satellites of the satellites from which the global positioning system 21 is able to receive the satellite signal. Referring to fig. 4, in some embodiments of step S11, the control circuit 22 obtains the number of satellites of the satellite according to the state of the satellite signal (step S110). Then, the control circuit 22 determines whether the number of the obtained satellites is larger than a number threshold (step S111). If the number of satellites is greater than the number threshold, the control circuit 22 executes a first determination procedure (step S112). If the number of satellites is not greater than the number threshold, the control circuit 22 executes a second determination procedure (step S113).
In some embodiments, the number of satellites and the number threshold are positive integers. In some embodiments, the quantity threshold is a positive integer greater than 3. In some embodiments, to calculate the onboard 2D position (latitude and longitude) and orbital movement, at least 3 satellites must be received, so the number threshold may be 3. In an exemplary embodiment, in step S111, when the number of satellites is greater than or equal to 3, the control circuit 22 executes the first determination procedure, i.e., proceeds to step S12. In step 111, when the number of satellites is less than 3 (i.e., the situation where the number of satellites is 0-2), the control circuit 22 executes the second determination procedure, i.e., proceeds to step S13. In some embodiments, if the number of satellites is greater than 2, but the state of the satellite signal received by the GPS is invalid, and the number of satellites is still determined to be not greater than 2, the control circuit 22 executes the second determination procedure, and then proceeds to step S131. In some embodiments, to calculate the 3D position (latitude, longitude, and altitude) and the moving state of the vehicle, satellite signals of at least 4 satellites must be received, so the number threshold may be 4.
Reference is continued to fig. 4. In some embodiments of step S12, the control circuit 22 calculates a vehicle speed on-board the vehicle based on the satellite signals (step S121), and the control circuit 22 selectively locks the on-board screen 30 based on the vehicle speed (step S122). In some embodiments, the first determination process in step S121 includes the control circuit 22 calculating the vehicle speed of the vehicle based on Differential navigation positioning technology (Differential GPS) and satellite signals to obtain a more accurate vehicle speed.
In some embodiments of step S13, the control circuit 22 generates a movement signal using the inertial sensor 23 on the vehicle (step S131), and the control circuit 22 selectively locks the screen 30 on the vehicle according to the movement signal (step S132).
In some embodiments, steps S10 to S13 are repeated, that is, the method for switching the car screen is repeatedly performed to determine whether the screen 30 is locked again. For example, after the steps S12 and S13 are performed, the process returns to the step S10 and the following steps. Alternatively, after the steps S12 and S13 are completed, the process returns to the step S10 and the subsequent steps after a certain duration.
Fig. 5 is a detailed flowchart of an exemplary step S122 in fig. 4. Referring to fig. 5, in one embodiment, after the control circuit 22 determines that the first determination process is performed (step S112), it determines whether the vehicle speed is greater than a speed threshold (step S1220). If so, that is, when the vehicle speed is greater than the speed threshold, the control circuit 22 locks the on-vehicle screen 30 (step S1221). If not, that is, when the vehicle speed is not greater than the speed threshold, the control circuit 22 does not lock the on-vehicle screen 30 (step S1222).
In some embodiments, step S100 is returned to after step S1221 and step S1222; i.e. repeatedly cycle confirming the state of the satellite signal. In some embodiments, after steps S1221 and S1222, the screen 30 is maintained in the original state for a duration, and the process returns to step S100, i.e., the state of the satellite signal is confirmed every other duration.
Fig. 6 is a detailed flowchart of an exemplary step S131-132 in fig. 4. Referring to fig. 6, in some embodiments, step 131 further includes the control circuit 22 receiving the first axis acceleration value, the second axis acceleration value, and the third axis acceleration value from the inertial sensor 23 (step S1310). In some embodiments, the inertial sensor 23 is implemented as a three-axis accelerometer (accelerometer sensor). In some embodiments, the first axis acceleration value and the second axis acceleration value are any two of an X axis acceleration value, a Y axis acceleration value, and a Z axis acceleration value. In some embodiments, the first and second axis acceleration values are selected from two of an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis acceleration value, depending on the direction of travel of the vehicle and the direction of travel of the vehicle up and down.
Subsequently, the control circuit 22 performs a gain operation of the first axis acceleration value to obtain a first operation value (step S1311) and the control circuit 22 performs a gain operation of the second axis acceleration value to obtain a second operation value (step S1312). In some embodiments, the gain operation is to make more than four times the gain of the first axis acceleration value or the second axis acceleration value. In some embodiments, the gain operation refers to multiplying the first axis acceleration value or the second axis acceleration value by four. The gain operation is more convenient for subsequent operation and setting of operation.
Next, the control circuit 22 performs a vector operation with the third axis acceleration value, the first operation value and the second operation value to obtain a motion signal (step S1313). In some embodiments, the vector operation is a summation operation of the third axis acceleration value, the first operation value and the second operation value as a vector to obtain the motion signal.
In one example, a represents the third axis acceleration value, b represents the first operation value, and c represents the second operation value, and the sum of the square of a plus the square of b plus the square of c plus the root of the c is the sum of the first and second operation values to obtain the motion signal, which is denoted as the motion signal
Therefore, the operation formula is as follows:
next, in step S1320, the control circuit 22 compares the movement signal with a preset vibration threshold, and when the movement signal is greater than the vibration threshold, the control circuit 22 locks the on-vehicle screen 30 (step S1321). Conversely, when the movement signal is not greater than the vibration threshold, the control circuit 22 does not lock the screen 30 mounted on the vehicle (step S1322). In some embodiments, the vibration threshold may be adjusted as desired.
In some embodiments, locking the in-vehicle screen 30 means disabling one of the touch function of the screen 30, disabling the display function of the screen 30, or some preset display frames of the display screen 30, or disabling both of these functions of the screen 30, so that the screen 30 assumes a locked state. The unlocking of the on-vehicle screen 30 means that various functions (such as a touch function and a display function) of the screen 30 are normally operated, so that the screen 30 is in a normal state. In some embodiments, the unlocking of the screen 30 in steps S122, S132, S1222, and S1322 may be to unlock the current screen 30 (i.e., to switch the operating state of the screen 30 from the locked state to the normal state), or to maintain the unlocking state of the current screen 30 (i.e., to keep the operating state of the screen 30 in the normal state). In some embodiments, the locking of the screen 30 in steps S1221 and S1321 may be to switch the operating state of the screen 30 from the normal state to the locked state until the screen 30 is determined not to be locked in a subsequent cycle, switch the operating state of the screen 30 from the normal state to the locked state for a period of time, or maintain the current locked state of the screen 30.
In some embodiments, the control Circuit 22 can be implemented by a Central Processing Unit (CPU), a system on a chip (soc) chip, a Microcontroller (MCU), an Integrated Circuit (IC), a Microprocessor (Microprocessor), etc., but the invention is not limited thereto.
In some embodiments, the motion state value may be one or more of acceleration, tilt, shock, vibration, rotation, and multiple degree of freedom (DoF) motion values.
In some embodiments, the inertial sensor 23 is implemented by at least one of an accelerometer (accelerometer sensor), a gyroscope (gyrosope), a fiber optic gyroscope, a laser gyroscope, and a micro-electrical (EMES) gyroscope.
It should be noted that, although the steps are described in sequence, the sequence is not a limitation of the present invention, and persons skilled in the art should understand that the execution sequence of the partial steps can be performed simultaneously or exchanged in sequence where reasonable.
The technical disclosure of the present invention is described in the above-mentioned preferred embodiments, but the present invention is not limited thereto, and those skilled in the art should understand that the present invention can be modified and modified without departing from the spirit of the present invention, and therefore, the scope of the present invention should be determined by the appended claims.
Claims (12)
1. A switching method of a vehicle-mounted screen is characterized by comprising the following steps:
detecting at least one satellite signal from at least one satellite;
executing a first judgment program or a second judgment program according to the state of the at least one satellite signal;
when the first judgment program is executed, calculating a vehicle speed of a vehicle according to the at least one satellite signal, and selectively locking a screen of the vehicle according to the vehicle speed; and
when the second judgment program is executed, a movement signal is generated by utilizing the vehicle-mounted inertial sensor, and the vehicle-mounted screen is selectively locked according to the movement signal.
2. The method of claim 1, wherein the step of executing the first determining procedure or the second determining procedure according to the state of the at least one satellite signal comprises:
obtaining the satellite number of the at least one satellite according to the state of the at least one satellite signal;
comparing the number of satellites with a number threshold;
when the number of the satellites is larger than the number threshold value, executing the first judgment program; and
and executing the second judgment program when the number of the satellites is not greater than the number threshold.
3. The method of claim 1, wherein the step of selectively locking the screen on-board the vehicle according to the vehicle speed comprises:
comparing the vehicle speed to a speed threshold;
when the vehicle speed is greater than the speed threshold value, locking the vehicle-mounted screen; and
and when the vehicle speed is not greater than the speed threshold value, the vehicle-mounted screen is not locked.
4. The method for switching the vehicular screen according to claim 1, wherein the step of selectively locking the vehicular screen according to the movement signal comprises:
comparing the moving signal with a vibration threshold value;
when the mobile signal is larger than the vibration threshold value, locking the vehicle-mounted screen; and
and when the movement signal is not greater than the vibration threshold value, the vehicle-mounted screen is not locked.
5. The method for switching between screens of a vehicle as claimed in claim 1, wherein the step of generating the movement signal by the inertial sensor of the vehicle comprises:
receiving a first axis acceleration value, a second axis acceleration value and a third axis acceleration value from the inertial sensor on the vehicle;
performing a gain operation on the first axial acceleration value to obtain a first operation value;
performing a gain operation on the second axis acceleration value to obtain a second operation value; and
and performing vector operation on the third axis acceleration value, the first operation value and the second operation value to obtain the motion signal.
6. The method of claim 1, wherein the vector operation with the third axis acceleration value, the first operation value and the second operation value to obtain the motion signal is performed according to the following formula:
wherein the content of the first and second substances,
represents the motion signal, a represents the third axis acceleration value, b represents the first operation value, and c represents the second operation value.
7. A control system of an on-vehicle screen, comprising:
a global positioning system for detecting at least one satellite signal from at least one satellite;
the inertial sensor is used for sensing vehicle-mounted motion and correspondingly generating at least one motion state value; and
a control circuit, coupled to the gps and the inertial sensor, for executing a first determination procedure or a second determination procedure according to a state of the at least one satellite signal;
when the first judgment program is executed, the control circuit calculates a vehicle speed of the vehicle according to the at least one satellite signal and selectively locks a screen of the vehicle according to the vehicle speed; and when the second judgment program is executed, the control circuit generates a movement signal according to the at least one motion state value and selectively locks the vehicle-mounted screen according to the movement signal.
8. The system of claim 7, wherein the control circuit implements the first determining process or the second determining process according to the state of the at least one satellite signal by:
obtaining the satellite number of the at least one satellite according to the state of the at least one satellite signal;
comparing the number of satellites with a number threshold;
executing the first judgment program when the number of the satellites is larger than the set threshold value; and
and executing the second judgment program when the number of the satellites is not greater than the set threshold value.
9. The control system of claim 7, wherein the control circuit selectively locks the on-board screen according to the vehicle speed by:
comparing the vehicle speed to a speed threshold;
when the vehicle speed is greater than the speed threshold value, locking the vehicle-mounted screen; and
and when the vehicle speed is not greater than the speed threshold value, the vehicle-mounted screen is not locked.
10. The control system of claim 7, wherein the control circuit selectively locks the on-board screen according to the movement signal by performing the following actions:
comparing the moving signal with a vibration threshold value;
when the mobile signal is larger than the vibration threshold value, locking the vehicle-mounted screen; and
and when the movement signal is not greater than the vibration threshold value, the vehicle-mounted screen is not locked.
11. The control system of claim 7, wherein the at least one motion state value comprises: a first axis acceleration value, a second axis acceleration value and a third axis acceleration value, and the control circuit is configured to generate the movement signal according to the at least one motion state value by performing the following operations:
receiving the first axis acceleration value, the second axis acceleration value, and the third axis acceleration value from the inertial sensor on the vehicle;
performing a gain operation on the first axial acceleration value to obtain a first operation value;
performing a gain operation on the second axis acceleration value to obtain a second operation value; and
and performing vector operation on the third axis acceleration value, the first operation value and the second operation value to obtain the motion signal.
12. The control system of claim 11, wherein the control circuit performs the vector operation with the third axis acceleration value, the first operation value and the second operation value to obtain the movement signal by performing the operation according to the following formula:
wherein the content of the first and second substances,
represents the motion signal, a represents the third axis acceleration value, b represents the first operation value, and c represents the second operation value.
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