CN109164696A - A kind of clock pointers localization method, calibration method, equipment and readable storage medium storing program for executing - Google Patents
A kind of clock pointers localization method, calibration method, equipment and readable storage medium storing program for executing Download PDFInfo
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- CN109164696A CN109164696A CN201811150324.8A CN201811150324A CN109164696A CN 109164696 A CN109164696 A CN 109164696A CN 201811150324 A CN201811150324 A CN 201811150324A CN 109164696 A CN109164696 A CN 109164696A
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G5/00—Setting, i.e. correcting or changing, the time-indication
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Abstract
The invention discloses a kind of clock pointers localization method, calibration method, equipment and readable storage medium storing program for executing, needle locating method includes: the initial angle that S1. obtains acceleration transducer;S2. the current angular of acceleration transducer is obtained;S3. the position of clock pointers is calculated according to the current angular of acceleration transducer and initial angle, the current angular of the acceleration transducer is the angle for rotating clock and watch and making hour hands corresponding acceleration transducer when being directed toward predeterminated position.Calibration method includes the above method, further includes: the time difference of time and standard time that the position that S4. obtains the clock pointers is directed toward;S5. according to the time difference drive clock pointers directional beacon it is punctual between.The present invention overcomes cumbersome and errors when manual school in the prior art, and larger, automatic correcting time needs the problem of relying on mobile phone.While when realizing clock and watch school using acceleration transducer, whole operation process is filled with interactive and amusement sense, improves the Experience Degree of user.
Description
Technical Field
The invention relates to the field of clock timing, in particular to a clock pointer positioning method, a clock timing method, clock timing equipment and a readable storage medium.
Background
Along with the increase of the technological development of intelligence wearing and people to intelligence wearing product demand and the improvement of requirement, intelligence action pointer type clock and watch has received the favor in market. As a tool for people to master time, the travel time error of the clock directly influences the life and work of people. The existing clock is generally accurate in time running, but no matter how accurate the clock is, after the clock runs for a long time, the clock inevitably suffers from factors such as external vibration, magnetic field, temperature, friction of internal components and the like, and generates deviation with standard time, and at the moment, the time needs to be corrected to accurate time.
In the prior art, for a common pointer type clock, such as a mechanical clock or a quartz clock, manual time correction is generally adopted, and a pointer of the clock can be shifted to return to a correct time point. For an intelligent pointer type clock capable of being connected with a mobile phone, the current pointer position of the clock is generally input into the mobile phone, the mobile phone acquires accurate current time, and the intelligent clock then tracks the pointer to the correct time by calculating the angle difference between the pointer position and the actual time position.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide the pointer type intelligent clock timing method and system based on the acceleration sensor, which are simple and convenient to operate and good in user experience.
The technical scheme adopted by the invention is as follows: an acceleration sensor-based timepiece hand positioning method, in which an acceleration sensor is provided, comprising the steps of:
s1, acquiring an initial angle of an acceleration sensor;
s2, acquiring the current angle of the acceleration sensor;
and S3, calculating the position of the clock pointer according to the current angle and the initial angle of the acceleration sensor, wherein the current angle of the acceleration sensor is the angle of the corresponding acceleration sensor when the clock is rotated to enable the pointer to point at the preset position.
Preferably, the preset position is a position where the clock hand points to the gravity acceleration direction or a position where the clock hand is parallel to the horizontal plane.
Preferably, the step S3 specifically includes:
s31, calculating an inclination angle by utilizing the gravity acceleration component, wherein the inclination angle is an included angle between the X-axis component of the gravity acceleration and a horizontal plane;
and S32, calculating the position of the clock pointer according to the current angle, the initial angle and the inclination angle of the acceleration sensor.
Preferably, the acceleration sensor rotates on an X-Y plane of the timepiece surface following the timepiece, an X-axis direction of the acceleration sensor is parallel to a 3 o ' clock direction of the timepiece, a Y-axis direction of the acceleration sensor is parallel to a 6 o ' clock direction of the timepiece, an initial angle of the acceleration sensor in step S1 is an acceleration sensor angle corresponding to a case where the 6 o ' clock direction and the Y-axis direction overlap, and the preset position is a position where a timepiece hand points to a gravitational acceleration direction.
Preferably, the timepiece hands include an hour hand, a minute hand and a second hand.
An acceleration sensor-based clock timing method comprises the acceleration sensor-based clock pointer positioning method, and the acceleration sensor-based clock timing method further comprises the following steps:
s4, acquiring the time difference between the time pointed by the position of the clock pointer and the standard time;
and S5, driving the clock hands to point to standard time according to the time difference.
Preferably, the step S4 specifically includes the following steps:
s41, acquiring the time pointed by the position of the clock pointer;
s42, acquiring a pointer position corresponding to the standard time;
s43, rotating the clock to enable the second hand of the clock to point to the positions of the hour hand, the minute hand and the second hand corresponding to the standard time in sequence, acquiring the positions of the hour hand, the minute hand and the second hand corresponding to the standard time by the clock by using an acceleration sensor, and taking the time pointed by the positions of the hour hand, the minute hand and the second hand corresponding to the standard time as the standard time;
s44, acquiring the time difference between the time pointed by the position of the clock pointer and the standard time.
An acceleration sensor based timepiece time correction device comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method described above.
A computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform the above-described method.
The invention has the beneficial effects that: the clock pointer positioning method based on the acceleration sensor changes the angle of the acceleration sensor by rotating the clock and obtains the position of the clock pointer by using an algorithm. When the clock pointer is positioned by using the acceleration sensor, the operation process is full of interactivity and entertainment, and the user experience is improved.
The invention has the following beneficial effects: a clock timing method based on an acceleration sensor acquires the time difference between the time pointed by the position of a clock pointer and standard time, and drives the clock pointer to point to the standard time according to the time difference so as to achieve the purpose of timing. The problems that in the prior art, manual time correction is complicated in operation and large in error, and automatic time correction needs to depend on a mobile phone are solved. When the acceleration sensor is used for realizing clock timing, the whole operation process is full of interactivity and entertainment, and the user experience is improved.
The invention can be widely applied to equipment needing time correction, such as clocks, watches and the like.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an intelligent pointer-type timepiece according to the invention;
FIG. 2 is a diagram of an example of single axis tilt detection of an acceleration sensor in the present invention;
FIG. 3 is a graph showing the relationship between the output acceleration and the inclination angle in the single-axis inclination detection according to the present invention;
FIG. 4 is a diagram of an example of the two-axis tilt detection of the acceleration sensor in the present invention;
FIG. 5 is a diagram showing the relationship between the output acceleration and the tilt angle in the biaxial tilt detection in the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1, the acceleration sensor-based timepiece of the invention includes an acceleration sensor, a controller, a gear box, and a timepiece hand.
The controller firstly acquires the initial angle of the acceleration sensor, rotates the clock to enable the clock to point to the preset position and then acquires the current angle of the acceleration sensor, and then calculates the position of the clock pointer according to the current angle and the initial angle of the acceleration sensor. The preset position may be a position pointing vertically downward in the direction of gravitational acceleration, or a position parallel to the horizontal plane. And the controller acquires the time difference between the time pointed by the position of the clock pointer and the standard time, and sends out corresponding pulse waves to drive the gear box by using the time difference, and the gear box is in transmission connection with the clock pointer so as to drive the clock pointer to point to the standard time and finish time correction.
The calculation of the position of the clock hand according to the current angle and the initial angle of the acceleration sensor specifically comprises: calculating an inclination angle by utilizing the gravity acceleration component, wherein the inclination angle is an included angle between the X-axis component of the gravity acceleration and the horizontal plane; and calculating the position of the clock pointer according to the current angle, the initial angle and the inclination angle of the acceleration sensor.
In this embodiment, the controller is an MCU microprocessor or a single chip microcomputer.
In this embodiment, the smart clock is further provided with a key, an indicator light and/or a motor. The user makes the clock enter the timing mode through the button to indicate the user to enter the timing mode through the blinking of the indicator light or the vibration of the motor, and the clock pointer stops moving.
As shown in FIG. 4, the initial angle of the acceleration sensor is that the X-axis direction is parallel to the 3 o 'clock direction of the clock, the Y-axis direction of the acceleration sensor is parallel to the 6 o' clock direction of the clock, the user rotates the clock, the acceleration sensor on the clock rotates along with the X-Y plane of the clock surface, the user rotates the clock to make the second hand point to the gravity acceleration direction, namely the hand is perpendicular to the horizontal plane, and keeps the static state for 3 seconds, the controller obtains the inclination angle α (the inclination angle is the angle between the X-axis component of the gravity acceleration and the horizontal plane) through calculation, converts the current inclination angle into the position of the second hand in the dial after detecting that the inclination angle is stable and unchanged for 3 seconds, and prompts the user to continue to rotate the watch through indicator lamp flashing or motor vibration, and obtains the positions of the minute hand and the.
The principle and algorithm for converting the gravitational acceleration component into the inclination angle are as follows (two schemes of single-axis inclination calculation and double-axis inclination calculation are described):
the uniaxial tilt calculation of the acceleration sensor will be described with reference to fig. 2 and 3. In fig. 2, a single axis (X-axis) rotates by gravity. Since this method uses only a single axis and requires gravitational acceleration, the tilt calculation angle is accurate only when the X-axis of the device is always on the gravitational plane. Any rotation in the other axis will reduce the component of acceleration in the X-axis, and errors will be introduced in the calculation of the tilt angle.
As shown in fig. 2, the projection of the acceleration of gravity on the X-axis will produce an output acceleration Ax equal to the sine of the angle between the X-axis of the accelerometer and the horizontal plane, which is generally a plane orthogonal to the gravity vector, when gravity is the ideal value of 1g, the output acceleration Ax is 1g × sin α.
According to the output acceleration obtained by the above method, the acceleration can be converted into the inclination angle α by using an arcsine function, that is, α ═ arcsin (Ax/g).
As can be seen from FIG. 3, FIG. 3 plots output acceleration (in g) against tilt angle α. near + -90, there is only a small change in output acceleration when there is a large change in tilt angle.
One limitation of single axis tilt detection is that high resolution ADCs (Analog-to-Digital converters) or Digital outputs are required to achieve a wide range of effective tilt angles; another limitation is that single axis measurements cannot provide a 360 measurement because the acceleration produced at an angle of inclination of N is the same as the acceleration produced at an angle of inclination of 180-N. For applications requiring higher resolution or requiring differentiation of tilt angles over a full 360 arc, a second axis, or a second sensor, is required.
The principle of the double-shaft acceleration sensor is as follows: on mutually perpendicular X and Y axes, the X axis output acceleration is proportional to the sine of the tilt angle, and the Y axis output acceleration is proportional to the cosine of the tilt angle. In the tilting process, along with the reduction of the sensitivity of one axis, the sensitivity of the other axis can be increased, so that the continuity of the detection sensitivity in the full tilting angle range is ensured. Even if the third axis has inclination, the inclination angle can be detected according to the relative change rate of the X axis and the Y axis, and the accurate value is ensured to be measured.
The calculation of the biaxial inclination of the acceleration sensor is described with reference to fig. 4 and 5, fig. 4 is an example of the biaxial inclination detection of the acceleration sensor of the present invention, fig. 5 is a graph of the relationship between the output acceleration and the inclination angle in the biaxial inclination detection of the present invention, and as shown in fig. 4, the acceleration sensor rotates in the X-Y plane, the gravity acceleration projection on the X axis generates the output acceleration Ax equal to the sine of the angle between the X axis of the accelerometer and the horizontal plane, the gravity acceleration projection on the Y axis generates the output acceleration Ay equal to the sine of the angle between the X axis of the accelerometer and the horizontal plane, and when the gravity is an ideal value of 1g, the output acceleration Ax is 1g × sin α, and Ay is 1g × cos α.
The tilt angle can be obtained by calculating the arctangent function of the ratio of the X axis and the Y axis, where Ax/Ay is (1g × sin α)/(1g × cos α) tan α, and α arctan (Ax/Ay).
If the operand Ax/Ay is positive, the arctangent function will return the value in the first quadrant; if the operand is negative, the arctan function returns the value in the fourth quadrant. The operand in the second quadrant is negative and therefore the result should be added by 180 ° when calculating the tilt angle in that quadrant. The operand in the third quadrant is a positive value, so 180 should be subtracted from the result when calculating the tilt angle in that quadrant. The exact quadrant in which the tilt angle is located can be determined by the sign of the measured acceleration on each axis. Each quadrant has a different sign combination associated with the x and y axes of acceleration, thus enabling tilt angle measurement throughout a 360 arc.
Since the position of the gravitational acceleration sensor in the timepiece is fixed, rotating the timepiece maintains a resting state for three seconds when the timepiece hands and the gravitational acceleration g coincide (or are at 90 °), i.e. the timepiece hands are perpendicular (or parallel) to the horizontal plane. Obtaining the inclination angle through the angle conversion method, and obtaining the position of the clock pointer in the dial according to the inclination angle: assuming that the initial angle of the acceleration sensor is the position where the positive direction of the X axis points to the dial 12, when the second hand and the gravitational acceleration g coincide, the inclination angle is 30 ° obtained by converting the inclination angle from the gravitational acceleration component, and it is found that the position of the second hand in the dial is 330 ° clockwise, that is, the time pointed by the second hand is 55 seconds, by using the correspondence relationship between the inclination angle and the hand position. In the same way, the positions of the minute hand and the hour hand in the dial can be obtained, so that the time pointed by the minute hand and the hour hand can be obtained.
When the controller calculates the position of the second, minute and hour hands in the dial and the time it is pointing at, the user presses the key again to put the timepiece in the time-calibrated mode. When a user rotates the watch, the second hand automatically traces the hand and is always perpendicular to the horizontal plane, the second hand sequentially points to the hour, minute and second position of standard time and then keeps a standing state for 3 seconds, the controller correspondingly converts the angles of the three hands into time, and the time is stored as the standard time by adding the middle standing time.
And the user presses a key again to calculate the time difference between the time pointed by the pointer and the standard time or calculate the angle difference corresponding to the time difference. For example, if the clock hands are pointing at a time of 55 seconds in minutes a and B and the standard time is 58 seconds in minutes a, the time difference is 3 seconds, and the corresponding angle difference is 18 °. The controller generates PWM pulse waveform according to the time difference (or the angle difference) to drive the gear box. For example, 1 pulse waveform is required to drive for 1 second, and the controller generates 3 pulse waveforms to drive the gearbox. The gear box is in transmission connection with the clock pointer, so that the clock pointer is driven to point to standard time, and time correction is completed.
In the present embodiment, the acceleration sensor may also employ a geomagnetic sensor or a combination of both. When the geomagnetic sensor is used for time correction, the clock can be rotated to the position where the pointer points to the north N for time correction.
The invention also discloses a clock timing device based on the acceleration sensor, which comprises:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the pointer positioning method and the timepiece timing method described above.
The invention also discloses a computer-readable storage medium which stores computer-executable instructions for causing a computer to execute the pointer positioning method and the clock timing method.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. An acceleration sensor-based timepiece hand positioning method, characterized in that an acceleration sensor is provided in the timepiece, the method comprising the steps of:
s1, acquiring an initial angle of an acceleration sensor;
s2, acquiring the current angle of the acceleration sensor;
and S3, calculating the position of the clock pointer according to the current angle and the initial angle of the acceleration sensor, wherein the current angle of the acceleration sensor is the angle of the corresponding acceleration sensor when the clock is rotated to enable the pointer to point at the preset position.
2. The method for positioning the hands of the timepiece based on the acceleration sensor according to claim 1, wherein the preset position is a position where the hands of the timepiece point in the direction of gravitational acceleration or a position where the hands of the timepiece are parallel to a horizontal plane.
3. The method according to claim 1, wherein step S3 specifically includes:
s31, calculating an inclination angle by utilizing the gravity acceleration component, wherein the inclination angle is an included angle between the X-axis component of the gravity acceleration and a horizontal plane;
and S32, calculating the position of the clock pointer according to the current angle, the initial angle and the inclination angle of the acceleration sensor.
4. The method as claimed in claim 1, wherein the acceleration sensor rotates along an X-Y plane of the timepiece surface, the X-axis direction of the acceleration sensor is parallel to the 3 o ' clock direction of the timepiece, the Y-axis direction of the acceleration sensor is parallel to the 6 o ' clock direction of the timepiece, the initial angle of the acceleration sensor in step S1 is the corresponding angle of the acceleration sensor when the 6 o ' clock direction and the Y-axis direction of the timepiece overlap, and the preset position is the position where the hands of the timepiece point to the gravitational acceleration direction.
5. The method for the positioning of the hands of a timepiece based on an acceleration sensor according to claim 1, characterized in that said timepiece hands comprise an hour hand, a minute hand and a second hand.
6. An acceleration sensor-based timepiece time correction method, comprising an acceleration sensor-based timepiece hand positioning method according to any one of claims 1 to 5, the acceleration sensor-based timepiece time correction method further comprising the steps of:
s4, acquiring the time difference between the time pointed by the position of the clock pointer and the standard time;
and S5, driving the clock hands to point to standard time according to the time difference.
7. The acceleration sensor-based clock timing method according to claim 6, wherein the step S4 specifically comprises the steps of:
s41, acquiring the time pointed by the position of the clock pointer;
s42, acquiring a pointer position corresponding to the standard time;
s43, rotating the clock to enable the second hand of the clock to point to the positions of the hour hand, the minute hand and the second hand corresponding to the standard time in sequence, acquiring the positions of the hour hand, the minute hand and the second hand corresponding to the standard time by the clock by using an acceleration sensor, and taking the time pointed by the positions of the hour hand, the minute hand and the second hand corresponding to the standard time as the standard time;
s44, acquiring the time difference between the time pointed by the position of the clock pointer and the standard time.
8. An acceleration sensor based timepiece time correction device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 7.
9. A computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 1 to 7.
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CN110716413A (en) * | 2019-09-18 | 2020-01-21 | 天王电子(深圳)有限公司 | Control circuit, intelligent wrist-watch and wearable equipment of pointer automatic correction |
CN113075876A (en) * | 2021-03-31 | 2021-07-06 | 安徽华米信息科技有限公司 | Wearable device, physical pointer calibration method, electronic device, and storage medium |
CN115826384A (en) * | 2022-11-30 | 2023-03-21 | 河南大学 | Automatic timing device for field geological survey |
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