WO2015170585A1 - Dispositif électronique - Google Patents

Dispositif électronique Download PDF

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Publication number
WO2015170585A1
WO2015170585A1 PCT/JP2015/062118 JP2015062118W WO2015170585A1 WO 2015170585 A1 WO2015170585 A1 WO 2015170585A1 JP 2015062118 W JP2015062118 W JP 2015062118W WO 2015170585 A1 WO2015170585 A1 WO 2015170585A1
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WO
WIPO (PCT)
Prior art keywords
acceleration
angular velocity
electronic device
sensor
velocity sensor
Prior art date
Application number
PCT/JP2015/062118
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English (en)
Japanese (ja)
Inventor
山田　幸光
Original Assignee
アルプス電気株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to JP2016517860A priority Critical patent/JP6268281B2/ja
Publication of WO2015170585A1 publication Critical patent/WO2015170585A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
    • G01C19/5776—Signal processing not specific to any of the devices covered by groups G01C19/5607 - G01C19/5719
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers

Definitions

  • the present invention relates to an electronic device including an acceleration sensor and an angular velocity sensor.
  • Motion sensors that detect the posture and movement of an object have been used in various industrial fields in the past. It has come to be used a lot. For example, in smartphones, tablet PCs, game console controllers, etc., products that are equipped with IC acceleration sensors and angular velocity sensors that realize various convenient functions according to posture and movement have been developed. It attracts attention.
  • Patent Document 1 describes an electronic device including an acceleration sensor and a gyro sensor (angular velocity sensor) as a motion sensor.
  • an angular velocity sensor that has been made into an IC is often a MEMS (micro-electro-mechanical-systems) device in which a minute vibrating body is formed on a semiconductor chip, and the vibration of the vibrating body always occurs when detecting the angular velocity. Yes. Since it is necessary to supply relatively large electric energy to drive the vibrating body, the angular velocity sensor has a problem that the power consumption is several times to ten times that of the acceleration sensor.
  • MEMS micro-electro-mechanical-systems
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide an electronic device that can detect an attitude or the like using an acceleration sensor and an angular velocity sensor while suppressing power consumption.
  • An electronic device is an electronic device equipped with an acceleration sensor and an angular velocity sensor, and whether or not an external force different from gravity is applied to the electronic device based on acceleration detected by the acceleration sensor.
  • the determination unit determines that the external force is not applied and the determination unit determines that the angular velocity is not detected, the determination unit determines that the external force is applied.
  • An angular velocity sensor control unit that controls the angular velocity sensor so as to be in an activated state in which the angular velocity can be detected. According to the electronic device having the above-described configuration, when the determination unit determines that the external force different from gravity is not acting on the electronic device, the angular velocity is set so that the acceleration cannot be detected.
  • the angular velocity sensor Since the sensor is controlled, power consumption in the angular velocity sensor is significantly reduced.
  • the determination unit determines that the external force different from gravity is applied to the electronic device, the angular velocity sensor is in an activated state, and therefore the detection result of the electronic device is used using the detection result of the angular velocity sensor. It becomes possible to accurately detect the posture and the like.
  • the determination unit includes an acceleration in one axial direction detected by the acceleration sensor, or a combined acceleration obtained by combining accelerations in a plurality of axial directions detected by the acceleration sensor and a predetermined threshold value. And determining whether or not the external force is acting on the electronic device based on the comparison result.
  • the determination unit may determine that the external force is acting on the electronic device when the acceleration or the combined acceleration detected by the acceleration sensor exceeds a first acceleration greater than a gravitational acceleration. .
  • the determination unit may be configured to apply the external force to the electronic device when the acceleration or the combined acceleration detected by the acceleration sensor is smaller than a second acceleration smaller than the first acceleration and larger than the gravitational acceleration. If the acceleration or the combined acceleration detected by the acceleration sensor is included in the range from the first acceleration to the second acceleration, the previous determination result may be maintained. According to the above configuration, even when the acceleration or the combined acceleration detected by the acceleration sensor fluctuates slightly with a value close to the first acceleration or the second acceleration, the determination result in the determination unit is frequently obtained. No change. Therefore, a state in which the standby state and the activation state of the acceleration sensor are frequently repeated is less likely to occur.
  • the angular velocity sensor may include a moving body used for detecting the angular velocity.
  • the angular velocity sensor control unit may control the angular velocity sensor so that the moving body moves in the activated state and the moving body stops in the standby state.
  • the electronic device when the determination unit determines that the external force is not acting, the electronic device detects a posture based on an acceleration detection result of the acceleration sensor, and when the external force is acting, When it is determined by the determination unit, it may have a posture detection unit that detects a posture based on the detection result of the angular velocity in the angular velocity sensor.
  • the angular velocity sensor control unit determines in the determination unit that the external force is not acting when the posture detection based on the detection result of the angular velocity in the angular velocity sensor is performed in the posture detection unit.
  • the starting state of the angular velocity sensor may be maintained.
  • the angular velocity sensor is maintained in the activated state regardless of the determination result of the determination unit during the detection of the posture based on the detection result of the angular velocity in the posture detection unit.
  • the detection processing of the posture detection unit is not interrupted by the standby state of the angle sensor.
  • the power consumption can be suppressed by setting the angular velocity sensor to the standby state when the angular velocity detection is unnecessary.
  • FIG. 1 It is a figure which shows the external appearance of the spectacles type electronic device which concerns on this embodiment. It is a figure which shows an example of a structure of the spectacles type electronic device shown in FIG. It is a flowchart for demonstrating the process which controls an angular velocity sensor according to the detection result of an acceleration sensor. It is a flowchart for demonstrating one modification of the process which controls an angular velocity sensor according to the detection result of an acceleration sensor. It is a flowchart for demonstrating another modification of the process which controls an angular velocity sensor according to the detection result of an acceleration sensor.
  • FIG. 1 is a diagram illustrating the appearance of a spectacle-type electronic apparatus according to an embodiment of the invention.
  • the eyeglass-type electronic device shown in FIG. 1 includes a front portion 1 located on the front surface (face) of the head, two temple portions 2 located on the side surface (the temple) of the head, and the front portion 1 and the temple portion. And two connecting portions 3 that connect the two in a foldable manner.
  • the front portion 1 has two rims 4 that hold spectacle lenses and a bridge 5 that connects the two rims 4.
  • the bridge 5 is formed of resin or the like, for example, and a circuit board 6 on which electronic components such as an acceleration sensor 10 and an angular velocity sensor 20 described later are mounted is accommodated in the bridge 5.
  • FIG. 2 is a diagram illustrating an example of an electrical configuration of the eyeglass-type electronic device illustrated in FIG.
  • the eyeglass-type electronic device according to the present embodiment includes an acceleration sensor 10, an angular velocity sensor 20, and a processing unit 30, for example, as shown in FIG.
  • the acceleration sensor 10 is a sensor that detects acceleration acting on the spectacle-type electronic device, and converts, for example, a distance by which a minute mechanism member formed on a semiconductor chip by MEMS technology is displaced against a spring force into an electric signal. By doing so, a signal corresponding to the acceleration is output.
  • the acceleration sensor 10 detects acceleration in a plurality of axial directions (biaxial direction and triaxial direction) orthogonal to each other.
  • the angular velocity sensor 20 is a sensor that detects an angular velocity when the spectacles-type electronic device moves. For example, a minute mechanism member (moving body) formed on a semiconductor chip by MEMS technology is moved, and the mechanism member is rotated by rotation. The detection signal of the angular velocity according to the Coriolis force generated in is output.
  • the acceleration sensor 10 detects angular velocities in a plurality of axial directions (biaxial direction and triaxial direction) orthogonal to each other.
  • the processing unit 30 processes sensor signals respectively output as sensing results from the acceleration sensor 10 and the angular velocity sensor 20, and detects the posture, movement, vibration, and the like of the eyeglass-type electronic device.
  • the processing unit 30 includes, for example, a microcomputer and a dedicated logic circuit.
  • the processing unit 30 includes a sensor signal processing unit 31, a determination unit 32, and an angular velocity sensor control unit 33 as functional processing blocks.
  • the sensor signal processing unit 31 detects the posture, movement, vibration, and the like of the eyeglass-type electronic device based on the acceleration data acquired by the acceleration sensor 10 and the angular velocity data acquired by the angular velocity sensor 20. For example, when the sensor signal processing unit 31 determines in the determination unit 32 described later that no external force is acting on the spectacles-type electronic device, the sensor signal processing unit 31 determines the posture of the spectacles-type electronic device based on the acceleration data acquired by the acceleration sensor 10. When the determination unit 32 determines that an external force is acting on the glasses-type electronic device, the posture of the glasses-type electronic device is detected based on the angular velocity data acquired by the angular velocity sensor 20.
  • the sensor signal processing unit 31 is an example of a posture detection unit in the present invention.
  • the determination unit 32 determines whether or not an external force different from gravity is acting on the spectacle-type electronic device based on the acceleration data acquired by the acceleration sensor 10. For example, the determination unit 32 compares the combined acceleration obtained by combining the accelerations in the plurality of axial directions detected by the acceleration sensor 10 with a predetermined threshold value, and based on the comparison result, the spectacle-type electronic device has a function other than gravity. It is determined whether or not an external force is acting.
  • the angular velocity sensor control unit 33 When the determination unit 32 determines that the external force is not applied to the spectacles type electronic device, the angular velocity sensor control unit 33 is in a standby state where the angular velocity cannot be detected, and the external force is applied to the spectacles type electronic device.
  • the angular velocity sensor 20 When it is determined by the determination unit 32, the angular velocity sensor 20 is controlled so as to be in an activated state in which the angular velocity can be detected. That is, the angular velocity sensor control unit 33 controls the angular velocity sensor 20 so that the moving body used for angular velocity detection is stationary when the angular velocity sensor 20 is in the standby state, and when moving the angular velocity sensor 20 into the activated state, Controls the angular velocity sensor 20 so as to perform a predetermined motion. When the moving body is stationary, the power consumption of the angular velocity sensor 20 is significantly reduced.
  • the sensor signal processing unit 31 of the processing unit 30 can detect the posture of the eyeglass-type electronic device based on the acceleration data acquired by the acceleration sensor 10, and this posture is the direction of the gravitational acceleration indicated by the acceleration data. If a component other than gravitational acceleration is included in the acceleration data, it is difficult to detect a correct posture based only on the acceleration data. That is, when the acceleration data includes a component other than gravitational acceleration, it is necessary to calculate the rotation angle based on the angular velocity data acquired by the angular velocity sensor 20 and detect the posture from this rotation angle. . In other words, if the external force different from gravity is not acting on the spectacle-type electronic device (quasi-static state), the spectacle-type electronic device can be positioned without using the angular velocity sensor 20. It means that it can be detected. Therefore, in the eyeglass-type electronic device according to the present embodiment, when the determination unit 32 determines that no external force is acting on the eyeglass-type electronic device, the angular velocity sensor 20 is set to the standby state.
  • FIG. 3 is a flowchart for explaining processing for controlling the angular velocity sensor 20 in accordance with the detection result of the acceleration sensor 10.
  • the processing shown in FIG. 3 is repeatedly executed at regular intervals, for example.
  • the determination unit 32 acquires acceleration data A in the acceleration sensor 10 (ST10).
  • the determination unit 32 calculates the acceleration data A as the magnitude of the combined vector when combining the plurality of axial acceleration data acquired by the acceleration sensor 10 as a vector.
  • the determination unit 32 compares the acceleration data A with a predetermined threshold value TH (ST20).
  • This threshold value TH is set to a value slightly larger than the gravitational acceleration, for example.
  • the angular velocity sensor control unit 33 activates the angular velocity sensor 20 (ST30). For example, the angular velocity sensor control unit 33 controls the angular velocity sensor 20 so that an internal moving body is driven to perform a predetermined movement.
  • the angular velocity sensor control unit 33 sets the angular velocity sensor 20 in a standby state (ST40). For example, the angular velocity sensor control unit 33 controls the angular velocity sensor 20 so that the internal moving body stops. When the moving body is stationary, the power consumption of the angular velocity sensor 20 is significantly reduced.
  • the eyeglass-type electronic device As described above, according to the eyeglass-type electronic device according to the present embodiment, whether or not an external force different from gravity is applied to the eyeglass-type electronic device is determined based on the acceleration detected by the acceleration sensor 10.
  • the angular velocity sensor 20 enters a standby state, and when it is determined that an external force is acting, the angular velocity sensor 20 is activated.
  • the angular velocity sensor 20 is in the standby state. Compared with a conventional electronic device in which the sensor 20 is always activated, power consumption can be significantly reduced.
  • the angular velocity sensor 20 can be activated and the rotation angle or the like can be calculated from the detection signal of the angular velocity sensor 20. Therefore, it is possible to accurately detect the posture of the eyeglass-type electronic device.
  • FIG. 4 is a flowchart for explaining a modification of the process for controlling the angular velocity sensor 20 according to the detection result of the acceleration sensor 10.
  • the acceleration data A varies with a value close to the threshold value TH.
  • the determination result of the determination unit 32 changes frequently. Therefore, in the process shown in FIG. 4, it is determined whether or not an external force is acting on the eyeglass-type electronic device based on the two threshold values TH1 and TH2.
  • the threshold values TH1 and TH2 are both larger than the gravitational acceleration, and the threshold value TH1 is larger than the threshold value TH2 (TH1> TH2).
  • the determination unit 32 acquires acceleration data A in the acceleration sensor 10 (ST10).
  • the acceleration data A is calculated as the magnitude of the combined vector.
  • the determination unit 32 compares the acceleration data A with the threshold value TH1 (ST15). If determination unit 32 determines that acceleration data A is greater than threshold value TH1, angular velocity sensor control unit 33 activates angular velocity sensor 20 (ST30). For example, the angular velocity sensor control unit 33 controls the angular velocity sensor 20 so that the moving body performs a predetermined movement.
  • the determination unit 32 determines that the acceleration data A is smaller than the threshold value TH1
  • the determination unit 32 compares the acceleration data A with the threshold value TH2 (ST25). If the acceleration data A is smaller than the threshold value TH2, the angular velocity sensor control unit 33 puts the angular velocity sensor 20 in a standby state (ST40). For example, the angular velocity sensor control unit 33 controls the angular velocity sensor 20 so that the internal moving body stops. When the moving body is stationary, the power consumption of the angular velocity sensor 20 is significantly reduced.
  • the angular velocity sensor control unit 33 maintains the state of the angular velocity sensor 20. That is, the angular velocity sensor control unit 33 keeps the angular velocity sensor 20 in the standby state if the angular velocity sensor 20 is in the standby state, and keeps the angular velocity sensor 20 in the activated state if the angular velocity sensor 20 is in the activated state.
  • the acceleration data A fluctuates near the thresholds TH1 and TH2 by determining whether or not an external force is acting on the glasses-type electronic device based on the two thresholds TH1 and TH2.
  • FIG. 5 is a flowchart for explaining another modification of the process of controlling the angular velocity sensor according to the detection result of the acceleration sensor. 3 and 4 described above, when the determination unit 32 determines that the acceleration data A is smaller than the threshold value TH (threshold value TH2), the angular velocity sensor control unit 33 causes the angular velocity sensor 20 to be in the standby state. However, if the angular velocity sensor 20 is in a standby state while the sensor signal processing unit 31 is detecting the posture or the like based on the angular velocity data, the detection processing of the sensor signal processing unit 31 is before the processing result is obtained. There is a possibility of being canceled. Therefore, in the process shown in FIG.
  • step ST35 for determining the use state of the angular velocity data is inserted between step ST25 and step ST40 in the process shown in FIG.
  • the angular velocity sensor control unit 33 determines that the angular velocity data A is smaller than the threshold value TH2 in the determination unit 32 (external force acts on the spectacle-type electronic device). If it is determined that the angular velocity sensor 20 is not in operation, the angular velocity sensor 20 is maintained in the activated state. Thereby, since the angular velocity sensor 20 is maintained in the activated state until the sensor signal processing unit 31 completes the processing using the angular velocity data, it is possible to prevent the processing of the sensor signal processing unit 31 from being stopped unnecessarily.
  • the present invention is not limited to this.
  • only one axial acceleration may be detected by the acceleration sensor.
  • the determination unit may determine whether or not an external force is acting on the electronic device based on a result of comparing the acceleration in one axial direction with a predetermined threshold value.
  • an eyeglass-type electronic device is taken as an example, but the present invention is not limited to this. That is, the present invention can be widely applied to various electronic devices (a mobile phone, a smartphone, a tablet, a notebook computer, a portable game machine, a controller for a game machine, a wearable device) provided with an acceleration sensor and an angular velocity sensor.

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  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Human Computer Interaction (AREA)
  • Telephone Function (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)
  • Gyroscopes (AREA)

Abstract

Le problème décrit par l'invention est de fournir un dispositif électronique qui peut détecter l'attitude et des paramètres similaires en utilisant un capteur d'accélération et un capteur de vitesse angulaire tout en maîtrisant la consommation d'énergie. Selon la solution de l'invention, il est déterminé si une force externe autre que la gravité agit sur un dispositif électronique de type lunettes en fonction du degré d'accélération détecté par un capteur d'accélération (10). S'il est déterminé qu'aucune force extérieure n'agit, un capteur de vitesse angulaire (20) entre dans un état de veille, et s'il est déterminé qu'une force extérieure agit, le capteur de vitesse angulaire (20) entre dans un état actif. Grâce à cette configuration, si le dispositif électronique de type lunettes est entré dans un état de quasi-hibernation et la détection de l'attitude et de paramètres similaires du dispositif électronique de type lunettes en fonction de l'accélération est possible, le capteur de vitesse angulaire (20) entre dans un état de veille, donc la quantité d'énergie consommée peut être réduite considérablement par rapport à un dispositif électronique dans lequel le capteur de vitesse angulaire (20) est toujours dans un état actif.
PCT/JP2015/062118 2014-05-09 2015-04-21 Dispositif électronique WO2015170585A1 (fr)

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JP2014-098184 2014-05-09

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Cited By (2)

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JP6288901B1 (ja) * 2017-07-31 2018-03-07 株式会社石野サーキット 落下検知手段、落下警報手段及び落下通報手段
CN111930230A (zh) * 2020-07-27 2020-11-13 歌尔光学科技有限公司 姿态检测方法、可穿戴设备及计算机可读存储介质

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CN113534500B (zh) * 2020-04-14 2023-01-13 所乐思(深圳)科技有限公司 智能眼镜、监控人体姿态的方法、介质、终端及系统

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