CN113075876B - Wearable device, physical pointer calibration method, electronic device and storage medium - Google Patents
Wearable device, physical pointer calibration method, electronic device and storage medium Download PDFInfo
- Publication number
- CN113075876B CN113075876B CN202110352233.8A CN202110352233A CN113075876B CN 113075876 B CN113075876 B CN 113075876B CN 202110352233 A CN202110352233 A CN 202110352233A CN 113075876 B CN113075876 B CN 113075876B
- Authority
- CN
- China
- Prior art keywords
- physical pointer
- magnetic field
- geomagnetic sensor
- pointer
- physical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation
- G04G7/005—Synchronisation provided with arrangements to prevent synchronisation by interfering signals
Abstract
The present disclosure provides a wearable device, a physical pointer calibration method, an electronic device, and a storage medium, the wearable device including: a physical pointer, the physical pointer having magnetism; the geomagnetic sensor is used for acquiring magnetic field data; and the controller is used for acquiring the magnetic field data acquired by the geomagnetic sensor and determining the current position of the physical pointer according to the magnetic field data. By arranging the physical pointer with magnetism and the geomagnetic sensor for acquiring the magnetic field data, the controller can acquire the magnetic field data acquired by the geomagnetic sensor and determine the current position of the physical pointer according to the magnetic field data, so that the current position of the physical pointer can be objectively and accurately determined.
Description
Technical Field
The disclosure relates to the technical field of wearable devices, and in particular relates to a wearable device, a physical pointer calibration method, an electronic device and a storage medium.
Background
With the improvement of living standards and the improvement of scientific technology, more and more wearable devices integrate the functions of watches, especially the structures and functions of physical pointers of watches, and such wearable devices may have inconsistent time indicated by the pointers and standard time due to violent movement and the like in the use process, and this situation requires the calibration of the pointers, but the wearable devices in the related art can only determine the positions of the physical pointers through the subjective judgment of the user, so that the calibration accuracy is low and the efficiency is not high.
Disclosure of Invention
To overcome at least one of the problems in the related art, the present disclosure provides a wearable device, a physical pointer calibration method, an electronic device, and a storage medium.
In a first aspect, a wearable device is provided, comprising: a physical pointer, the physical pointer having magnetism; the geomagnetic sensor is used for acquiring magnetic field data; and the controller is used for acquiring the magnetic field data acquired by the geomagnetic sensor and determining the current position of the physical pointer according to the magnetic field data.
In some embodiments, the wearable device may have a dial. The physical pointer may be provided on a dial, and the geomagnetic sensor may be provided on the back of the dial.
In some embodiments, a distance between the geomagnetic sensor and the center of the dial plate is less than a length of the physical pointer.
In some embodiments, the number of the geomagnetic sensors is one.
In some embodiments of the disclosure, the controller is to:
according to the magnetic field data, determining the reference time for rotating the physical pointer from the current position to the reference position corresponding to the geomagnetic sensor;
and determining the current position of the physical pointer according to the reference time and the reference position.
In some embodiments of the present disclosure, the controller is to determine the reference time based at least in part on magnetic field strength values in the magnetic field data.
For example, the controller may determine a time corresponding to a data having a maximum intensity value or meeting a first intensity requirement in the magnetic field data as a reference time corresponding to the reference position.
In some embodiments, the number of the geomagnetic sensors is multiple, and the multiple geomagnetic sensors may be symmetrically distributed with respect to the center of the dial.
In some embodiments, the at least one geomagnetic sensor is four geomagnetic sensors located at vertex positions of a rectangle centered on the center of the dial.
In some embodiments, the plurality of geomagnetic sensors are equidistant from a center of the dial plate.
In some embodiments, the controller is configured to obtain the current position of the physical pointer based on the magnetic field data collected by the plurality of geomagnetic sensors and a specific algorithm.
In some embodiments of the disclosure, the controller is to: in response to determining to perform automatic pointer calibration, activating the geomagnetic sensor.
Some embodiments of the present disclosure further include: a timer for the time-piece of the electronic device,
the controller is further configured to: and controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor in response to the determination of automatic pointer calibration, and controlling the timer to start timing.
In some embodiments of the present disclosure, the controller is further configured to:
acquiring standard time, and determining the target position of the physical pointer according to the standard time;
and controlling the physical pointer to rotate to the target position according to the current position.
In some embodiments of the present disclosure, the wearable device further has a clock unit; the controller is used for acquiring the standard time from the clock unit.
In some embodiments of the present disclosure, the controller is further configured to:
in response to receiving a calibration instruction or determining that a calibration period is met, determining to perform an automatic pointer calibration, or controlling the wearable device to enter an automatic calibration mode.
In some embodiments of the present disclosure, the controller is further configured to control the physical pointer to stop rotating in a timing mode and rotate to a reference position corresponding to the geomagnetic sensor in a calibration mode in response to determining to perform automatic pointer calibration.
In some embodiments of the present disclosure, the physical hands include an hour hand, a minute hand, and a second hand.
In some embodiments, the hour, minute and second hands increase in length and decrease in width in sequence.
In some embodiments, the controller is configured to sequentially control the hour hand, the minute hand, and the second hand to rotate from current positions to reference positions corresponding to the geomagnetic sensor in a specific order, to determine current positions of the hour hand, the minute hand, and the second hand, and to control the hour hand, the minute hand, and the second hand to rotate to target positions in synchronization.
In some embodiments, the upper surface of each pointer is provided with a shielding layer to prevent mutual interference between the magnetic fields of the pointers.
In some embodiments of the present disclosure, the controller is further configured to:
an alert prompt is made in response to the magnetic field data meeting a second intensity requirement.
In a third aspect, a method for calibrating a physical pointer is provided, the method comprising:
controlling the physical pointer to rotate from the current position to a reference position corresponding to the geomagnetic sensor;
acquiring magnetic field data acquired by the geomagnetic sensor in the rotation process of the physical pointer;
determining a current position of the physical pointer based on the magnetic field data.
In some embodiments of the present disclosure, the determining the current position of the physical pointer from the magnetic field data comprises:
according to the magnetic field data, determining the reference time for rotating the physical pointer from the current position to the reference position corresponding to the geomagnetic sensor;
and determining the current position of the physical pointer according to the reference time and the reference position.
Some embodiments of the present disclosure further include:
responsive to determining to perform automatic pointer calibration, activating the geomagnetic sensor, and/or
In response to determining to perform the auto hand calibration, a timer is controlled to begin timing.
Some embodiments of the present disclosure further include:
acquiring standard time, and determining the target position of the physical pointer according to the standard time;
and controlling the physical pointer to rotate to the target position according to the current position.
In some embodiments of the present disclosure, the controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor includes:
sequentially controlling the hour hand, the minute hand and the second hand to rotate the reference positions corresponding to the geomagnetic sensor from the current positions according to a specific sequence;
the controlling the physical pointer to rotate to the destination position includes:
and controlling the hour hand, the minute hand and the second hand to synchronously rotate to a target position.
In some embodiments of the disclosure, the obtaining the standard time includes:
and acquiring the standard time from a clock unit.
In some embodiments of the present disclosure, the controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor includes:
and controlling the physical pointer to rotate from the current position to a reference position corresponding to the geomagnetic sensor in a calibration mode, wherein the rotation speed of the physical pointer in the calibration mode is different from the rotation speed of the physical pointer in a timing mode.
Some embodiments of the present disclosure further include:
and responding to the magnetic field data meeting the second strength requirement, and performing alarm prompt.
In a third aspect, an electronic device is provided, which comprises a memory for storing computer instructions executable on a processor, and a processor for, when executing the computer instructions, calibrating a physical pointer according to the second aspect.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of the second aspect.
The wearable device in the embodiment of the disclosure can enable the controller to acquire the magnetic field data acquired by the geomagnetic sensor and determine the current position of the physical pointer according to the magnetic field data by setting the magnetic physical pointer and the geomagnetic sensor for acquiring the magnetic field data, so that the current position of the physical pointer can be objectively and accurately determined.
Drawings
Fig. 1 is a circuit schematic diagram of a wearable device shown in an exemplary embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a wearable device shown in an exemplary embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a preset angle of rotation of a physical pointer according to an exemplary embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a wearable device shown in another exemplary embodiment of the present disclosure;
FIG. 5 is a flowchart illustrating a physical pointer calibration method according to an exemplary embodiment of the present disclosure;
fig. 6 is a block diagram of an electronic device shown in an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
At least one embodiment of the present disclosure provides a wearable device, which may be a hybrid pointer watch, with both physical pointers and an electronic display. Referring to fig. 1 and 2, examples of structural schematic diagrams of a wearable device are shown, including: a physical pointer 101, the physical pointer 101 having magnetism; a geomagnetic sensor 102 configured to acquire magnetic field data; a controller 103, configured to acquire the magnetic field data acquired by the geomagnetic sensor 102, and determine the current position of the physical pointer 101 according to the magnetic field data.
The wearable device can be an intelligent bracelet provided with a physical pointer, an intelligent watch and the like and comprises a wearable device main body and a wrist strap. The physical pointer 101 is provided to a wearable apparatus main body and is visible from the outside, for example, the wearable apparatus main body has a dial 105, and the physical pointer 101 is provided on the dial 105 of the wearable apparatus main body. The physical pointer 101 has magnetism, for example, the physical pointer 101 may be a permanent magnet, an electromagnet, a superconducting magnet, or the like, and the magnetism of the physical pointer 101 may be weak magnetism, and the embodiment of the present disclosure does not limit the implementation of the physical pointer.
The physical pointer 101 may be timed by rotating, and different positions in the rotating process may correspond to different times; the geomagnetic sensor 102 is arranged in the wearable device body, and can acquire magnetic field data in an environment where the geomagnetic sensor is located, for example, magnetic field data under the combined action of the magnetic field of the earth and the magnetic field of the physical pointer 101, because the position of the geomagnetic sensor 102 on the earth does not move greatly, the change of the magnetic field data acquired by the geomagnetic sensor 102 is mainly caused by the magnetic field of the physical pointer 101, and therefore it can be known that the magnetic field data of the geomagnetic sensor 102 and the relative position of the geomagnetic sensor and the physical pointer 101 are associated, and in order to ensure that the geomagnetic sensor 102 acquires effective magnetic field data, the distance between the geomagnetic sensor 102 and the center of the dial plate can be smaller than the length of the physical pointer; the controller 103 is provided in the wearable device main body and electrically connected to the geomagnetic sensor 102, and the controller 103 may be a dedicated controller 103 for acquiring magnetic field data collected by the geomagnetic sensor 102, or may be a main controller 103 of the wearable device. In addition, other electrical components such as a battery and a mainboard are arranged in the wearable equipment main body.
The wearable device in the embodiment of the present disclosure, by providing the physical pointer 101 with magnetism and the geomagnetic sensor 102 for acquiring magnetic field data, can enable the controller 103 to acquire the magnetic field data acquired by the geomagnetic sensor 102, and determine the current position of the physical pointer 101 according to the magnetic field data, so that the current position of the physical pointer 101 can be objectively and accurately determined, and the determined current position can be used as a basis when the physical pointer 101 is calibrated, thereby improving the accuracy and efficiency of calibration, and avoiding the problems of low calibration accuracy and efficiency caused by subjective judgment.
In some embodiments of the present disclosure, the controller 103 is configured to: according to the magnetic field data, determining the reference time for rotating the physical pointer 101 from the current position to the reference position corresponding to the geomagnetic sensor 102; determining the current position of the physical pointer 101 according to the reference time and the reference position.
A movement 104 composed of a stepping motor and/or a gear driving mechanism and the like is arranged in the wearable device main body, and the movement 104 can drive the physical pointer 101 to rotate; the controller 103 is electrically connected with the movement 104, and can control the movement 104 to drive the physical pointer 101 to rotate, so that the angle, direction and speed of rotation of the physical pointer 101 can be accurately controlled. In some embodiments, a timer may also be provided in the wearable device body for recording the time taken for the rotation of the physical pointer 101. Alternatively, the controller 103 may record the time that the clock in the wearable device body passes during the rotation of the physical pointer 101, which is not limited by the embodiment of the present disclosure.
In the embodiment of the present disclosure, the number of the geomagnetic sensors may be one, and the reference position may correspond to the geomagnetic sensors, for example, the reference position may be a facing position of the geomagnetic sensors, or the reference position may be a position near the facing position of the geomagnetic sensors, which is not limited in the embodiment of the present disclosure. The controller 103 may determine the reference position in a variety of ways. For example, the wearable device stores information of a reference position locally or at a network side, and the controller 103 may obtain the pre-stored information of the reference position, or the controller 103 may determine the reference position by analyzing magnetic field data acquired by the geomagnetic sensor, or the controller 103 may determine the reference position by combining other factors, which is not limited in this disclosure.
In some embodiments, the controller 103 may control the physical pointer 101 to rotate from the current actual position to a reference position corresponding to the geomagnetic sensor 102 after determining that the actual position of the physical pointer needs to be calibrated automatically or for other reasons, and control the timer to start timing, wherein the reference position may be passed by the physical pointer 101 during the rotation process, for example, the controller 103 may control the physical pointer to rotate by one turn, or may control the physical pointer to rotate to a fixed position, or may control the physical pointer to continuously rotate and collect magnetic field data in real time until the physical pointer passes the reference position based on the magnetic field data, which is not limited by the embodiments of the present disclosure.
In addition, the geomagnetic sensor 102 may be constantly in an operating state, may be in the same operating mode, or may be switched between different operating modes, and at this time, the controller 103 may control the operating mode of the geomagnetic sensor 102, for example, to switch between a detection azimuth mode and a pointer calibration mode, or to switch between another mode and a pointer calibration mode. In some embodiments, the geomagnetic sensor 102 may be activated only after determining that automatic pointer calibration is required or other situations that require determining the actual position of the physical pointer exist, and enter a sleep or off state after determining the position of the physical pointer, which is not limited by the embodiments of the present disclosure.
In some embodiments, the timing operation and the operation of acquiring the magnetic field data may be performed simultaneously, and optionally, the magnetic field data may be plotted with respect to the timing result for statistics, but the embodiment of the present disclosure does not limit this.
Referring to an example in fig. 3, the geomagnetic sensor is set at a position corresponding to 12 o' clock, and the physical pointer rotates clockwise from the current actual position to a reference position corresponding to the geomagnetic sensor by an angle 107, wherein, when the physical pointer 101 is controlled to rotate from the current position to the reference position, the physical pointer 101 may be controlled to rotate by 360 °, i.e., by an angle 106, to ensure that the physical pointer 101 passes through the reference position during the rotation process. In this case, the controller 103 may determine a time corresponding to the data with the maximum intensity value in the acquired magnetic field data as a reference time when the physical pointer 101 is located at the reference position. For example, the determination may be performed based on the timing result and a statistical result of the magnetic field data (for example, a curve of the magnetic field data with respect to the timing result) collected by the geomagnetic sensor 102, and the timing result of the point at which the magnetic field data is strongest is determined as the reference time; the reference time is then derived by comparing the starting time of the physical pointer 101 at the current position.
In another example, when the physical pointer 101 is controlled to rotate from the current position to the reference position, the rotation angle of the physical pointer 101 may be controlled to be less than 360 °, and the rotation end point may be the reference position corresponding to the geomagnetic sensor 102, that is, the rotation angle of the physical pointer is the angle 107, or may be another position after passing through the reference position corresponding to the geomagnetic sensor 102. Whether the physical pointer 101 passes through a reference position corresponding to the geomagnetic sensor 102 may be determined based on the magnetic field data collected by the geomagnetic sensor 102. Alternatively, the strength of the magnetic field data collected by the magnetic sensor 102 when the physical pointer 101 rotates to the reference position is recorded in advance, and then, when the physical pointer 101 is controlled to rotate, whether the physical pointer 101 passes through the position corresponding to the geomagnetic sensor 102 is determined according to whether the magnetic field data collected by the geomagnetic sensor 102 reaches the recorded strength. In this case, the controller 103 may determine a time corresponding to data meeting the first strength requirement in the magnetic field data as a reference time when the physical pointer 101 is located at the reference position, and then compare a starting time when the physical pointer 101 is located at the current position to obtain a reference time, where the magnetic field data reaches the recorded strength, that is, meets the first strength requirement.
In the disclosed embodiment, the controller 103 determines the reference time based at least in part on the magnetic field strength values in the magnetic field data.
In one example, the physical hands 101 include an hour hand, a minute hand, and a second hand, and the hour hand, the minute hand, and the second hand sequentially increase in length and decrease in width, so that the magnetic field strength of the respective physical hands is different, facilitating determination of the current position of each physical hand, respectively. Alternatively, the controller 103 may sequentially control the hour hand, the minute hand, and the second hand to rotate from the current positions to the reference positions corresponding to the geomagnetic sensor 102 according to a specific sequence, that is, the controller 103 sequentially determines the current positions of the hour hand, the minute hand, and the second hand, so that mutual interference of magnetic fields between different physical hands may be avoided, and thus the accuracy of position determination may be improved. In other examples, the hour, minute and second hands may be controlled to rotate synchronously, where magnetic shielding measures may be taken and/or multiple geomagnetic sensors may be provided to improve the accuracy of the position determination.
When determining the current position of the physical pointer 101, the controller 103 may determine an angle between the current position and the reference position according to the reference time, the reference position, and the rotation speed of the physical pointer 101. For example, the controller 103 may start rotation of the geomagnetic sensor 102, a timer, and a physical pointer calibration mode at the same time after determining to perform pointer auto-calibration, collect magnetic field data after the geomagnetic sensor 102 is started, record a time stamp of the geomagnetic data in a calibration time period after the timer is started, and record a start time stamp as Tb0, recording a time stamp of the reference position (e.g., a time point at which the magnetic field intensity collected by the geomagnetic sensor is maximum) as Tb1, physical pointer from the presentAngular velocity ω of position in calibration modeaRotate 360 deg. and return to current position, and take time of Ta 360/omegaaThus, the physical pointer is at an angular velocity ωaThe time required for the rotation from the reference position to the current position is Δ T ═ Ta-(Tb1-Tb0) The angle θ between the current position and the reference position is ωaΔ T, the controller may determine the current position as an angle θ ω with respect to the reference positionaPosition of Δ T.
In some embodiments of the present disclosure, after determining the current position of the physical pointer 101, the controller 103 is further configured to: acquiring standard time, and determining the target position of the physical pointer 101 according to the standard time; and controlling the physical pointer 101 to rotate to the destination position according to the current position.
The standard time may be a guide time of time calibration, that is, the time calibration aims to adjust the position of the physical pointer 101 to a position indicating the standard time. The standard time may be the standard time of the current time zone, and the physical pointer 101 is controlled to rotate by a specific angle so as to be located at the destination position, where the time indicated by the physical pointer is the standard time.
In some embodiments, a clock unit may be provided in the wearable device, and the clock unit may be provided with a standard time, and the controller may also obtain the standard time from the clock unit. In other embodiments, the information may be obtained from a terminal device in a connection state with the wearable device, or may be obtained directly from a network in a case of connecting to the network, which is not limited in this disclosure.
In some embodiments, the clock Unit, the timer, and the controller 103 may be integrated into a processor of the wearable device, such as a Micro Controller Unit (MCU).
In some embodiments, the angle at which the physical pointer needs to be adjusted may be determined based on the current position of the physical pointer and the destination position, or the angle at which the physical pointer needs to be adjusted, i.e., the angle between the destination position and the reference position, may be determined based on the reference position and the destination position. In addition, with continued reference to fig. 2, the dial 105 of the wearable device body has time scales, the physical pointer 101 uses the center of the dial 105 as a rotation axis, and the position of the physical pointer 101 includes: the position of the physical hands 101 with respect to the time scale of the dial 105. I.e. the current position, the destination position and the reference position in the above steps are all positions relative to the time scale of the dial 105. For example, the reference position may be a 12 o 'clock position, that is, the geomagnetic sensor 102 is provided at the 12 o' clock position of the dial 105.
The controller 103 may determine a calibration angle between the current position and the destination position according to the current position and the destination position, and then control the physical pointer 101 to rotate the calibration angle. For example, the angle between the current position and the reference position in the clockwise direction is 90 °, the angle between the destination position and the reference position in the clockwise direction is 91 °, and the calibration angle in the clockwise direction is 1 °.
In one example, the physical hands 101 include an hour hand, a minute hand, and a second hand, and the controller 103 may control the hour hand, the minute hand, and the second hand to rotate to a target position in synchronization.
In this embodiment, after the current position of the physical pointer 101 is determined, the destination position of the physical pointer 101 is further determined by the standard time, and finally, the physical pointer 101 is controlled to rotate to the destination position according to the current position of the physical pointer 101, so that the time indicated by the physical pointer 101 is consistent with the standard time, and the time calibration is completed. Thereby improving the accuracy and efficiency of the physical pointer 101 calibration.
In some embodiments of the present disclosure, after controlling the physical pointer 101 to rotate to the destination position, the controller 103 may further be configured to: controlling the physical pointer 101 to rotate in a timing mode, and controlling the timer to restart timing; in addition, before controlling the physical pointer 101 to rotate from the current position to the reference position, the controlling may be further configured to: in response to receiving a calibration instruction or determining that a calibration period is met, determining to perform automatic pointer calibration, or controlling the wearable device to enter an automatic calibration mode; after the automatic pointer calibration is determined, the physical pointer 101 is controlled to stop rotating in the timing mode, and to rotate to the reference position corresponding to the geomagnetic sensor in the calibration mode.
The calibration instruction may be an instruction input by a user, for example, an instruction input by the user directly for the wearable device, or an instruction input by the user for the wearable device in a connected state with the wearable device. The calibration period can be preset in advance, that is, the wearable device automatically calibrates every time a calibration period passes.
The wearable device has at least a timekeeping mode and a calibration mode, the timekeeping mode is a normal timekeeping mode, in the timekeeping mode, each physical hand 101 has a corresponding rotation speed, each physical hand 101 rotates at a respective rotation speed, for example, the hour hand rotates 360 ° every 12 hours, the minute hand rotates 360 ° every 60 minutes, the second hand rotates 360 ° every 1 minute, and accordingly the speed of the physical hand 101 in the timekeeping mode can be preset, and in the calibration mode, the above-mentioned operations of determining the current position and the destination position and controlling the physical hand 101 to rotate to the destination position are performed.
The timer performs timing in the above two modes, but the timing result has a different role. In the timing mode, the controller 103 controls the physical pointer 101 to rotate in the timing mode, and the timing result is used for judging whether the calibration period is met, so that when the timing result meets the calibration period or the calibration instruction, the physical pointer 101 is controlled to stop rotating in the timing mode, and the wearable device can be controlled to enter the calibration mode, that is, automatic pointer calibration is determined; after entering the calibration mode, the controller 103 may control the timer to empty the timing result and restart the timing, and the new timing result is used to determine the reference time in cooperation with the magnetic field data, and after the calibration mode is finished, the controller may control the timer to empty the timing result and restart the timing.
In the embodiment, the calibration mode is triggered through the calibration instruction and the calibration period, so that the pointer can be reasonably triggered when the pointer needs to be calibrated, the trigger accuracy of pointer calibration is improved, the timeliness of calibration is guaranteed, and excessive energy loss is avoided. In addition, when the wearable device is switched between the timing mode and the calibration mode, the rotation mode of the physical pointer 101 can be switched, and the timing is restarted when each mode is started, so that the timing result of the timer can be accurately, simply and directly utilized, and the operation accuracy in the two modes is improved.
In some embodiments of the present disclosure, the controller 103 is further configured to: controlling the physical pointer 101 to stop rotating and perform alarm prompting in response to the fact that the magnetic field data meet a second strength requirement; in addition, in response to the magnetic field data not meeting the second strength requirement, the physical pointer 101 is controlled to continue to rotate.
When the second intensity requirement is met, the second intensity requirement may be higher than or equal to a preset intensity threshold, that is, higher than the intensity threshold, it is determined that magnetic field interference exists in the environment where the wearable device is located, and not only normal time calibration cannot be performed, but also normal timing is easily affected. Therefore, the rotation of the physical pointer 101 is stopped, and an alarm prompt is performed to remind the user to carry the wearable device away from the interference magnetic field, and the alarm information in the form of voice or characters can be used for prompting.
In addition, the non-compliance with the second strength requirement may be that the magnetic field data is lower than a preset strength threshold and remains stable for a certain time, that is, after the magnetic field data is lower than the strength threshold for a certain time, the wearable device is determined to have been separated from the magnetic field interference, so that the physical pointer 101 continues to be rotated for time calibration, the magnetic field data of the position where the physical pointer 101 stays may be based on the stable magnetic field data lower than the strength threshold, and the stay time may be removed when calculation is performed according to the rotation time, so as to ensure the accuracy of the calculation.
Referring to fig. 4, in some embodiments of the present disclosure, the number of geomagnetic sensors in the wearable device is multiple, where the multiple geomagnetic sensors may be symmetrically distributed with respect to the center of the dial 105, or the multiple geomagnetic sensors may be equidistant from the center of the dial 105, for example, the multiple geomagnetic sensors may be arranged in a ring around the center of the dial. One end of the physical pointer 101 is fixed at the center of the dial 105, and the rotation timing is performed by taking the center of the dial 105 as an axis, so that the physical pointer 101 is centered on the dial 105 no matter where the physical pointer rotates; the plurality of geomagnetic sensors 102 are uniformly arranged, so that the magnetic field data acquired by each geomagnetic sensor 102 is relatively uniform, and the magnetic field data of the physical pointers 101 located at different positions (for example, when one physical pointer 101 is located at different positions, or when different physical pointers are located at different positions) are accurately acquired; alternatively, when the plurality of geomagnetic sensors 102 are equidistant from the center of the dial 105, the plurality of geomagnetic sensors 102 are centered on the center of the dial 105 similarly to the physical pointer 101, and thus the magnetic field data collected by the physical pointer 101 can be more accurate and reliable.
In one example, the at least one geomagnetic sensor 102 is four geomagnetic sensors 1021, 1022, 1023, and 1024, and the four geomagnetic sensors 1021, 1022, 1023, and 1024 are located at vertex positions of a rectangle centered on the center of the dial. The four geomagnetic sensors can acquire magnetic field data of the physical pointer 101 at different positions, and the magnetic field data acquired by the physical pointer 101 are accurate and reliable; in addition, the number of the geomagnetic sensors 102 is reasonable, so that effective acquisition of magnetic field data can be guaranteed, and waste of energy consumption can be avoided.
Based on the above structure, the controller 103 may be configured to obtain the current position of the physical pointer 101 based on the magnetic field data collected by the plurality of geomagnetic sensors 102 and a specific algorithm.
The specific algorithm may be a machine learning algorithm, which is capable of learning the magnetic field data collected by each geomagnetic sensor 102 at each position of the physical pointer 101 when the physical pointer 101 normally rotates in the timing mode, and when the current position of the physical pointer 101 is determined, the magnetic field data collected by each geomagnetic sensor 102 may be combined according to the learning result of the machine learning algorithm. For example, when the physical pointer 101 is operating normally, the algorithm may be used to record a mapping relationship between the magnetic field data collected by each geomagnetic sensor 102 and the timing result of the timer, that is, the controller 103 corresponds and records the magnetic field data collected by each geomagnetic sensor 102 and the timing result of the timer at the same time in real time. Therefore, when the current position of the physical pointer 101 is determined, information that matches the magnetic field data acquired by each geomagnetic sensor 102 may be searched for in the result of learning or recording, and the position of the physical pointer 101 corresponding to the time in the information may be determined as the current position.
The specific algorithm may also be a preset calculation formula, and the algorithm may be preset in advance, and after the magnetic field data acquired by each geomagnetic sensor is acquired, the magnetic field data is processed according to the preset calculation formula, and the current position of the physical pointer 101 is determined according to the processing result.
For example, in the example shown in fig. 4, the hour hand 1011, minute hand 1012, and second hand 1013 are provided outside the dial 105, and the four geomagnetic sensors 1021, 1022, 1023, and 1024 are provided inside the dial 105, and the hour hand 1011, minute hand 1012, and second hand 1013 may be electromagnets, and thus a magnetic field may be generated by energization or the magnetic field may be turned off by deenergization. Wherein, magnetic field data on X, Y and the three coordinate axis of Z can all be gathered to geomagnetic sensor 1021, 1022, 1023 and 1024, and the X axle can be the straight line that 9 and 3 are located in the dial plate, and the Y axle can be the straight line that 12 and 6 are located in the dial plate, and the Z axle can be the straight line perpendicular to the dial plate, and total magnetic field data can be calculated according to the following formula: t is2＝X2+Y2+Z2And X is the magnetic field intensity of an X axis collected by the geomagnetic sensor, Y is the magnetic field intensity of a Y axis collected by the geomagnetic sensor, Z is the magnetic field intensity of a Z axis collected by the geomagnetic sensor, and T is the total magnetic field intensity. The magnetic field intensity of the X axis collected by the geomagnetic sensor 1021 is X1The magnetic field intensity of the acquired Y axis is Y1The magnetic field intensity of the collected Z axis is Z1Total magnetic field strength of T1(ii) a The magnetic field intensity of the X axis acquired by the geomagnetic sensor 1022 is X2The magnetic field intensity of the acquired Y axis is Y2The magnetic field intensity of the collected Z axis is Z2Total magnetic field strength of T2(ii) a The magnetic field intensity of the X axis collected by the geomagnetic sensor 1023 is X3Of the acquired Y axisMagnetic field intensity of Y3The magnetic field intensity of the collected Z axis is Z3Total magnetic field strength of T3(ii) a The magnetic field intensity of the X axis acquired by the geomagnetic sensor 1024 is X4The magnetic field intensity of the acquired Y axis is Y4The magnetic field intensity of the collected Z axis is Z4Total magnetic field strength of T4. When the hour hand 1011, the minute hand 1012 and the second hand 1013 are in the positions shown in fig. 4, the magnetic fields of the hour hand 1011, the minute hand 1012 and the second hand 1013 may be sequentially turned on to be respectively collected and positioned by four geomagnetic sensors:
when the hour hand 1011 is powered on to generate a magnetic field and the minute hand 1012 and the second hand 1013 are powered off to turn off the magnetic field, the magnetic field data collected by the four geomagnetic sensors are as follows: t is1＝T2＜T3＝T4，X3+X4＝0，Y3＝Y4(ii) a The predetermined calculation formula can obtain the above result and determine the current position of the hour hand 1011 accordingly.
When the minute hand 1012 is powered on to generate a magnetic field, and the hour hand 1011 and the second hand 1013 are powered off to close the magnetic field, the magnetic field data collected by the four geomagnetic sensors are as follows: t is1＝T2＜T3＝T4，X2+X4＝0，Y2+Y40; the predetermined calculation formula can obtain the above result, and accordingly, the current position of the minute hand 1012 is determined.
When the second hand 1013 is powered on to generate a magnetic field and the hour hand 1011 and the minute hand 1012 are powered off to turn off the magnetic field, the magnetic field data collected by the four geomagnetic sensors are as follows: t is1＝T4＜T2＝T3，Y2+Y30; the predetermined calculation formula can obtain the above result and accordingly determine the current position of the second hand 1013.
At least one embodiment of the present disclosure provides a calibration method of a physical pointer, please refer to fig. 5, which illustrates a flow of the method, including steps S501 to S503.
In step S501, the physical pointer is controlled to rotate from the current position to a reference position corresponding to the geomagnetic sensor;
in step S502, magnetic field data acquired by the geomagnetic sensor in the rotation process of the physical pointer is acquired;
in step S503, the current position of the physical pointer is determined according to the magnetic field data.
In some embodiments of the present disclosure, the determining the current position of the physical pointer from the magnetic field data includes: according to the magnetic field data, determining the reference time for rotating the physical pointer from the current position to the reference position corresponding to the geomagnetic sensor; and determining the current position of the physical pointer according to the reference time and the reference position.
Some embodiments of the present disclosure further include: responsive to determining to perform automatic pointer calibration, activating the geomagnetic sensor, and/or
In response to determining to perform the auto hand calibration, a timer is controlled to begin timing.
Some embodiments of the present disclosure further comprise: acquiring standard time, and determining the target position of the physical pointer according to the standard time; and controlling the physical pointer to rotate to the target position according to the current position.
In some embodiments of the present disclosure, the controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor includes: sequentially controlling the hour hand, the minute hand and the second hand to rotate the reference positions corresponding to the geomagnetic sensor from the current positions according to a specific sequence; the controlling the physical pointer to rotate to the destination position includes: and controlling the hour hand, the minute hand and the second hand to synchronously rotate to a target position.
In some embodiments of the disclosure, the obtaining the standard time includes: the standard time is obtained from the clock unit.
In some embodiments of the present disclosure, the controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor includes: and controlling the physical pointer to rotate from the current position to a reference position corresponding to the geomagnetic sensor in a calibration mode, wherein the rotation speed of the physical pointer in the calibration mode is different from the rotation speed of the physical pointer in a timing mode.
Some embodiments of the present disclosure further include: and responding to the magnetic field data meeting the second strength requirement, and performing alarm prompt.
In one embodiment of the present disclosure, the geomagnetic sensor is disposed on the back of the 12 o 'clock position of the time scale on the dial, that is, the 12 o' clock position is a reference position; after the wearable device is connected with the terminal device in a matching mode, the time of the wearable device is synchronized to be standard time of the terminal device, and then the physical pointer of the wearable device runs according to a timing mode to perform timing.
When the wearable device encounters an abnormal scene in the using process, the display time of the physical pointer is abnormal, and at the moment, the wearable device is manually started or automatically started by a user; after the calibration mode is started, aiming at each physical pointer, the following steps are respectively carried out: the controller 103 may simultaneously start rotation of the geomagnetic sensor 102, the timer, and the physical pointer calibration mode, collect magnetic field data after the geomagnetic sensor 102 is started, record a timestamp of the geomagnetic data in the calibration time period after the timer is started, and record the initial timestamp as Tb0, recording the time stamp of the position of the reference position 12 (for example, the time point of the maximum magnetic field intensity collected by the geomagnetic sensor) as TbAngular velocity ω of a physical pointer in a calibration mode from a current positionaRotate 360 deg. and return to current position, and take time of Ta 360/omegaaThus, the physical pointer is at an angular velocity ωaThe time required for rotating from the reference position 12 point position to the current position is Ta-(Tb1-Tb0) The included angle theta between the current position and the position of the reference position 12 is omegaaΔ T, the controller may determine the current position as an angle θ ω with respect to the position of the reference position 12 pointaPosition of Δ T; after the included angle θ between each physical pointer and the 12-point reference position is determined according to the above steps, the controller may obtain the standard time from the clock unit, determine the target position according to the standard time, that is, determine the included angle α between the target position and the 12-point reference position, and further determine the angle that the physical pointer needs to rotate according to the included angle θ and the included angle αAnd after controlling the physical pointer to rotate by the angle, completing calibration. After the calibration is completed, the wearable device immediately exits the calibration mode and continues to perform regular timing in the timing mode.
Referring to fig. 6, in a third aspect, an electronic device is provided, where the electronic device includes a memory and a processor, the memory is used for storing computer instructions executable on the processor, and the processor is used for executing the computer instructions based on the physical pointer calibration method according to the second aspect.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of the second aspect.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (21)
1. A wearable device, comprising:
a physical pointer, the physical pointer having magnetism;
the geomagnetic sensor is used for acquiring magnetic field data;
a timer;
and the controller is used for controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor, controlling the timer to start timing, acquiring the magnetic field data acquired by the geomagnetic sensor, and determining the current position of the physical pointer according to the magnetic field data and the timing result of the timer.
2. The wearable device of claim 1, wherein the controller is to:
according to the magnetic field data, determining the reference time for rotating the physical pointer from the current position to the reference position corresponding to the geomagnetic sensor;
and determining the current position of the physical pointer according to the reference time and the reference position.
3. The wearable device of claim 2, wherein the controller is to determine the reference time based at least in part on a magnetic field strength value in the magnetic field data.
4. The wearable device of any of claims 1-3, wherein the controller is to: in response to determining to perform automatic pointer calibration, activating the geomagnetic sensor.
5. The wearable device of any of claims 1-3, wherein the controller is to: and controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor in response to the determination of automatic pointer calibration, and controlling the timer to start timing.
6. The wearable device of any of claims 1-3, wherein the controller is further configured to:
acquiring standard time, and determining the target position of the physical pointer according to the standard time;
and controlling the physical pointer to rotate to the target position according to the current position.
7. The wearable device of claim 6, further having a clock unit; the controller is used for acquiring the standard time from the clock unit.
8. The wearable device of any of claims 1-3, wherein the controller is further configured to:
in response to receiving a calibration instruction or determining that a calibration period is met, determining to perform an automatic pointer calibration, or controlling the wearable device to enter an automatic calibration mode.
9. The wearable device according to any of claims 1-3, wherein the controller is further configured to control the physical pointer to stop rotating in a timing mode and to rotate in a calibration mode to a reference position corresponding to the geomagnetic sensor in response to determining to perform automatic pointer calibration.
10. The wearable device according to any of claims 1-3, wherein the physical hands include an hour hand, a minute hand, and a second hand;
the controller is configured to sequentially control the hour hand, the minute hand, and the second hand to rotate from current positions to reference positions corresponding to the geomagnetic sensor in a specific order, to determine current positions of the hour hand, the minute hand, and the second hand, and to control the hour hand, the minute hand, and the second hand to synchronously rotate to a target position.
11. The wearable device of any of claims 1-3, wherein the controller is further configured to:
an alert prompt is made in response to the magnetic field data meeting a second intensity requirement.
12. A method of calibrating a physical pointer, the method comprising:
controlling the physical pointer to rotate from the current position to a reference position corresponding to the geomagnetic sensor, and controlling a timer to start timing;
acquiring magnetic field data acquired by the geomagnetic sensor in the rotation process of the physical pointer;
and determining the current position of the physical pointer according to the magnetic field data and the timing result of the timer.
13. The method of calibrating a physical pointer of claim 12 wherein said determining a current position of said physical pointer from said magnetic field data comprises:
according to the magnetic field data, determining the reference time for rotating the physical pointer from the current position to the reference position corresponding to the geomagnetic sensor;
and determining the current position of the physical pointer according to the reference time and the reference position.
14. The method for calibrating a physical pointer according to claim 12 or 13, further comprising:
responsive to determining to perform automatic pointer calibration, activating the geomagnetic sensor, and/or
In response to determining to perform the auto hand calibration, a timer is controlled to begin timing.
15. The method for calibrating a physical pointer according to claim 12 or 13, further comprising:
acquiring standard time, and determining the target position of the physical pointer according to the standard time;
and controlling the physical pointer to rotate to the target position according to the current position.
16. The method for calibrating a physical pointer according to claim 15, wherein the controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor comprises:
sequentially controlling the hour hand, the minute hand and the second hand to rotate the reference positions corresponding to the geomagnetic sensor from the current positions according to a specific sequence;
the controlling the physical pointer to rotate to the destination position includes:
and controlling the hour hand, the minute hand and the second hand to synchronously rotate to a target position.
17. The method for calibrating a physical pointer according to claim 15, wherein said obtaining a standard time comprises:
and acquiring the standard time from a clock unit.
18. The method for calibrating a physical pointer according to claim 12 or 13, wherein the controlling the physical pointer to rotate from the current position to the reference position corresponding to the geomagnetic sensor comprises:
and controlling the physical pointer to rotate from the current position to a reference position corresponding to the geomagnetic sensor in a calibration mode, wherein the rotation speed of the physical pointer in the calibration mode is different from the rotation speed of the physical pointer in a timing mode.
19. The method for calibrating a physical pointer according to claim 12 or 13, further comprising:
and responding to the magnetic field data meeting the second strength requirement, and performing alarm prompt.
20. An electronic device, comprising a physical pointer, at least one geomagnetic sensor, and a processor, wherein the processor is configured to execute computer instructions to implement the method for calibrating a physical pointer according to any one of claims 12 to 19.
21. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 12 to 19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352233.8A CN113075876B (en) | 2021-03-31 | 2021-03-31 | Wearable device, physical pointer calibration method, electronic device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352233.8A CN113075876B (en) | 2021-03-31 | 2021-03-31 | Wearable device, physical pointer calibration method, electronic device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113075876A CN113075876A (en) | 2021-07-06 |
| CN113075876B true CN113075876B (en) | 2022-06-10 |
Family
ID=76614547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110352233.8A Active CN113075876B (en) | 2021-03-31 | 2021-03-31 | Wearable device, physical pointer calibration method, electronic device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113075876B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197509A (en) * | 1996-05-24 | 1998-10-28 | 精工爱普生株式会社 | Position detector, encoder board, position detecting method, timer and electronic device |
| JP2007212354A (en) * | 2006-02-10 | 2007-08-23 | Seiko Instruments Inc | Watch hand position detector and watch having same |
| CN202837849U (en) * | 2011-10-27 | 2013-03-27 | 王维毅 | Clock with calibration function |
| CN104717356A (en) * | 2013-12-17 | 2015-06-17 | Lg电子株式会社 | Mobile terminal and controlling method thereof |
| CN104898598A (en) * | 2015-04-03 | 2015-09-09 | 深圳市前海安测信息技术有限公司 | Wearable device and method for evaluating direction of attacker |
| CN106354006A (en) * | 2016-11-30 | 2017-01-25 | 珠海市魅族科技有限公司 | Pointer-type timekeeper, timing control method and timing control device |
| CN108398874A (en) * | 2018-03-22 | 2018-08-14 | 深圳市伯尼智能科技有限公司 | A kind of method, apparatus when watch hand school and wrist-watch |
| CN109164696A (en) * | 2018-09-29 | 2019-01-08 | 深圳智芯数据服务有限公司 | A kind of clock pointers localization method, calibration method, equipment and readable storage medium storing program for executing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6759631B2 (en) * | 2016-03-07 | 2020-09-23 | セイコーエプソン株式会社 | Electronic clock |
| CN106066597A (en) * | 2016-08-09 | 2016-11-02 | 西安高泰电子科技有限公司 | A kind of fast-type pays respects to multifunctional intellectual wrist-watch and the control method of timing orientation |
| 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 |
-
2021
- 2021-03-31 CN CN202110352233.8A patent/CN113075876B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197509A (en) * | 1996-05-24 | 1998-10-28 | 精工爱普生株式会社 | Position detector, encoder board, position detecting method, timer and electronic device |
| JP2007212354A (en) * | 2006-02-10 | 2007-08-23 | Seiko Instruments Inc | Watch hand position detector and watch having same |
| CN202837849U (en) * | 2011-10-27 | 2013-03-27 | 王维毅 | Clock with calibration function |
| CN104717356A (en) * | 2013-12-17 | 2015-06-17 | Lg电子株式会社 | Mobile terminal and controlling method thereof |
| CN104898598A (en) * | 2015-04-03 | 2015-09-09 | 深圳市前海安测信息技术有限公司 | Wearable device and method for evaluating direction of attacker |
| CN106354006A (en) * | 2016-11-30 | 2017-01-25 | 珠海市魅族科技有限公司 | Pointer-type timekeeper, timing control method and timing control device |
| CN108398874A (en) * | 2018-03-22 | 2018-08-14 | 深圳市伯尼智能科技有限公司 | A kind of method, apparatus when watch hand school and wrist-watch |
| CN109164696A (en) * | 2018-09-29 | 2019-01-08 | 深圳智芯数据服务有限公司 | A kind of clock pointers localization method, calibration method, equipment and readable storage medium storing program for executing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113075876A (en) | 2021-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110462529B (en) | Analog electronic timepiece system and analog electronic timepiece | |
| EP1553469A1 (en) | Time correction system, time correction designating unit, pointer type clock, and method for correcting time | |
| US9022643B2 (en) | Analog electronic timepiece with fast-setting hands | |
| EP2548085B1 (en) | Analog quartz timepiece and method for providing time-correction of the same | |
| CN103970005B (en) | Analog electronic clock | |
| EP3373082A1 (en) | Time display device, electronic timepiece and time display control method | |
| US9367041B2 (en) | Method for displaying a trend over a timing operation and associated timepiece | |
| CN113075876B (en) | Wearable device, physical pointer calibration method, electronic device and storage medium | |
| JP6780292B2 (en) | Electronic clock | |
| US9989925B2 (en) | Analog type watch and time set method | |
| JP6874457B2 (en) | Information display methods, systems, programs, and information display devices | |
| JP2011122952A (en) | Analog electronic timepiece | |
| EP1634128B1 (en) | Method for compensating disturbances due to a plurality of step motors in an electronic compass | |
| JP6977283B2 (en) | Information display method, system, program, and information display device | |
| JP2020128958A (en) | Electronic watch | |
| US20180275612A1 (en) | Electronic timepiece | |
| CN113075875B (en) | Wearable device, physical pointer control method, electronic device, and storage medium | |
| CN214409590U (en) | Wearable device | |
| US20080056072A1 (en) | Daylight saving time adjustment method and timepiece employing the method | |
| JP2014077802A (en) | Analog electronic timepiece | |
| JP2019158341A (en) | Satellite radio wave receiver, electronic clock, and method for controlling notification of radio wave reception | |
| JP3123096B2 (en) | Stopwatch device | |
| JP2011027516A (en) | Electronic azimuth meter | |
| JP6011142B2 (en) | Electronic compass | |
| JP2019020268A (en) | Clock, clock system, and control method for clock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |