WO2020082204A1 - 柔性电子设备及其弯曲速度检测装置 - Google Patents

柔性电子设备及其弯曲速度检测装置 Download PDF

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Publication number
WO2020082204A1
WO2020082204A1 PCT/CN2018/111161 CN2018111161W WO2020082204A1 WO 2020082204 A1 WO2020082204 A1 WO 2020082204A1 CN 2018111161 W CN2018111161 W CN 2018111161W WO 2020082204 A1 WO2020082204 A1 WO 2020082204A1
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WIPO (PCT)
Prior art keywords
coil
bending speed
bending
detection device
flexible
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Application number
PCT/CN2018/111161
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English (en)
French (fr)
Inventor
胡小冬
陶波波
刘占超
Original Assignee
深圳市柔宇科技有限公司
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.)
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Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201880096021.4A priority Critical patent/CN112689765A/zh
Priority to PCT/CN2018/111161 priority patent/WO2020082204A1/zh
Publication of WO2020082204A1 publication Critical patent/WO2020082204A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/66—Devices characterised by the determination of the time taken to traverse a fixed distance using electric or magnetic means

Definitions

  • the present application relates to the technical field of electronic equipment, in particular to a flexible electronic equipment and a bending speed detection device thereof.
  • the present application provides a flexible electronic device and a bending speed detection device thereof, which has a simple structure and can detect the bending speed of the flexible electronic device in real time, quickly and accurately.
  • the present application provides a bending speed detection device that is disposed in a flexible housing.
  • the bending speed detection device includes:
  • a first magnetic member and a second magnetic member which are opposite in polarity and arranged oppositely;
  • the coil is rotatably disposed between the first magnetic member and the second magnetic member, and the coil performs cutting magnetic induction wire movement and generates induced current when rotating;
  • a driving mechanism is fixed in the flexible casing and fixedly connected to the coil, and the driving mechanism is used to drive the coil to rotate when the flexible casing is bent;
  • a detection circuit is electrically connected to the coil and used to detect the induced electromotive force generated on the coil and determine the bending speed of the flexible housing according to the detected induced electromotive force.
  • the present application provides an electronic device, including a flexible housing and the bending speed detection device described in the first aspect.
  • the bending speed detection device of the present application has a simple structure, and can detect the bending speed of the flexible electronic device in real time, quickly and accurately, thereby enhancing the user experience and enriching the functions of the flexible electronic device.
  • FIG. 1 is a schematic diagram of an internal structure of a flexible electronic device of the present application in a non-bending state.
  • FIG. 2 is an enlarged schematic diagram of the structure at the IV shown in FIG. 1.
  • FIG. 3 is a schematic structural diagram of the coil shown in FIG. 2.
  • FIG. 4 is a partial structural schematic view of the fixed terminal and the flexible housing shown in FIG. 3 in a connected state.
  • FIG. 5 is a schematic diagram of the internal structure of the flexible electronic device shown in FIG. 1 in a bent state.
  • FIG. 6 is a schematic structural view of the coil of FIG. 3 from another perspective.
  • FIG. 7 is a schematic diagram of functional modules of the detection circuit of the present application.
  • FIG. 8 is a schematic diagram of the circuit structure of the detection circuit of FIG. 7.
  • FIG. 1 is a schematic diagram of the internal structure of the flexible electronic device 100 of the present application in a non-bending state.
  • the flexible electronic device 100 in the embodiment of the present application may include mobile phones, tablet computers, wearable devices, e-book readers, players, and other electronic products.
  • the flexible electronic device 100 includes at least a flexible casing 10 and a bending speed detection device 20 provided inside the flexible casing 10. It can be understood that the bending speed detection device 20 may be provided at a bendable portion of the flexible housing 10 so as to accurately detect the bending speed of the flexible housing 10.
  • the flexible housing 10 includes first and second opposite ends 11 and 12 and first and second opposite sides 13 and 14.
  • the first and second sides 13 and 14 are located at Between the first end 11 and the second end 12, the bending speed detection device 20 is disposed between the first side 13 and the second side 14.
  • the bending speed detection device 20 includes first and second magnetic members 211 and 212, a coil 22, and a driving mechanism 24 disposed oppositely, wherein the first magnetic member 211 is close to the first side surface 13 is disposed, the second magnetic member 212 is disposed near the second side 14.
  • the polarity of the first magnetic member 211 is opposite to the polarity of the second magnetic member 212.
  • the first magnetic member 211 is an N-type permanent magnet
  • the second magnetic member 212 is an S-type permanent magnet.
  • the first magnetic member 211 is an S-type permanent magnet
  • the second magnetic member 212 is an N-type permanent magnet.
  • a magnetic field is generated between the first magnetic member 211 and the second magnetic member 212, it can be understood that the magnetic induction lines between the first magnetic member 211 and the second magnetic member 212 are from an N-type magnet Come out and enter the S-shaped magnet.
  • the coil 22 is rotatably disposed between the first magnetic member 211 and the second magnetic member 212. When the coil 22 rotates, it cuts the magnetic induction wire and generates an induced current. In this embodiment, when the flexible casing 10 is in a non-bent state, the planes where the coils 22 are located are perpendicular to the first side 13 and the second side 14, respectively.
  • the bending speed detection device 20 further includes a fixed terminal 23 for fixing the coil 22.
  • the extending direction of the fixed terminal 23 is parallel to the plane where the coil 22 is located
  • the coil 22 can be rotatably fixed in the flexible housing 10 through the fixed terminal 23.
  • a first connection portion 231 is provided on an end of the fixed terminal 23 away from the coil 22, and a second connection portion 15 matching the first connection portion 231 is provided on the flexible housing 10 (as shown in FIG. 4 ), The first connection portion 231 is connected to the second connection portion 15 to rotatably fix the coil 22 to the flexible housing 10.
  • first connecting portion 231 may be set as a lock structure, and accordingly, the second connecting portion 15 may be set as a lock hole structure.
  • the first connecting portion 231 may be at least one protrusion provided on the outer surface of the end of the fixed terminal 23, the protrusion including a
  • the fixed terminal 23 is away from the abutting surface 2311 of the end surface 232 of the fixed terminal 23.
  • the second connecting portion 15 may be a receiving hole provided on the flexible housing 10, and the opening of the receiving hole is provided with a resisting wall 151, the protrusion is inserted into the receiving hole, and
  • the coil 22 can be rotatably fixed in the flexible housing 10 by being able to rotate in the receiving hole and the inner surface of the abutting wall 151 by the abutting surface 2311.
  • the first connecting portion 231 may be a circular table provided at the end of the fixed terminal 23, that is, a plurality of the protrusions provided around the outer surface of the end of the fixed terminal 23
  • the round table is formed by integral molding.
  • the first connection portion 231 may also be set as the lock hole structure, and accordingly, the second connection portion 15 may be set as the lock structure.
  • the first connecting portion 231 may be a receiving hole provided on the end surface 232 of the fixed terminal 23, and accordingly, the second connecting portion 15 may be a connecting shaft provided on the flexible housing 10, And the outer surface of the end of the connecting shaft is provided with at least one protrusion or the end of the connecting shaft is provided with the circular table.
  • the driving mechanism 24 is fixed in the flexible casing 10 and fixedly connected to the coil 22, the driving mechanism 24 is used to drive when the flexible casing 10 is bent The coil 22 rotates.
  • the coil 22 includes a first side portion 221 and a second side portion 222 opposite to each other.
  • first side portion 221 is close to the first magnetic member 211
  • second side portion 222 is close to the second magnetic member 212.
  • the driving mechanism 24 includes a first driving member 241 and a second driving member 242, one end of the first driving member 241 is fixedly connected to the first side portion 221 of the coil 22, and the other end faces the flexible housing 10 The direction of the first end 11 extends and is fixed on the flexible housing 10.
  • One end of the second driving member 242 is fixedly connected to the second side portion 222 of the coil 22, and the other end extends toward the second end 12 of the flexible housing 10 and is fixed to the flexible housing 10 .
  • the extending direction of the first driving member 241 is parallel to the extending direction of the second driving member 242, and the extension of the fixed terminal 23
  • the directions are perpendicular to the extending directions of the first driving member 241 and the second driving member 242, respectively.
  • both the first driving member 241 and the second driving member 242 are elastic members, for example, elastic links or springs.
  • the flexible housing 10 is provided with a plurality of limiting posts 16 along the extending direction of the first driving member 241 and the second driving member 242, and the plurality of limiting posts 16 are used to drive the first driving post
  • the member 241 and the second driving member 242 are limited to predetermined positions, respectively, and enable the first driving member 241 and the second driving member 242 to stretch and contract along a preset path.
  • the first driving member 241 and the second driving member 242 elastically deform to drive the coil 22 to rotate in the first direction A1, that is, the coil
  • the first side portion 221 of 22 rotates toward the first end 11 of the flexible housing 10
  • the second side portion 222 of the coil 22 rotates toward the second end 12 of the flexible housing 10, thereby
  • the coil 22 is moved to cut the magnetic induction line.
  • the first driving member 241 and the second driving member 242 respectively restore elastic deformation so that the coil 22 is along the first direction A1
  • the opposite second direction A2 rotates, that is, the first side portion 221 of the coil 22 rotates toward the second end 12 of the flexible housing 10, and the second side portion 222 of the coil 22 faces the flexible
  • the direction of the first end 11 of the housing 10 rotates, so that the coil 22 moves in a cutting magnetic induction line.
  • the fixed terminal 23 includes a first electrode 233 and a second electrode 234, such as a positive electrode and a negative electrode.
  • the first electrode 233 and the second electrode 234 are electrically connected to the two free ends of the coil 22, respectively . It can be understood that other parts of the fixed terminal 23 may use an insulating material, the number of turns of the coil 22 is n, and the value of n is an integer greater than or equal to 1.
  • the bending speed detection device 20 further includes a detection circuit 25 that is electrically connected to the coil 22 for detecting the induced electrical signal generated on the coil 22 and according to the detected
  • the induced electrical signal determines the bending speed of the flexible housing 10.
  • the induced electrical signal includes induced electromotive force or induced current. It can be understood that, as the coil 22 changes the magnetic flux during the process of cutting the magnetic induction line, an induced electromotive force is generated on the coil 22. When the circuit where the coil 22 is located forms a closed loop, an induced current flows in the closed loop.
  • the detection circuit 25 includes a signal adjustment circuit 251, a sampling circuit 252, and a processor 253.
  • the signal adjustment circuit 251 is electrically connected to the coil 22 through the first electrode 233 or the second electrode 234 of the fixed terminal 23 The connection is used to detect the induced electrical signal generated by the coil 22 and adjust the detected induced electrical signal to output an adjusted voltage.
  • the signal adjustment circuit 251 includes an operational amplifier circuit 2511 for detecting the induced electromotive force generated by the coil 22 and amplifying the detected induced electromotive force and outputting an amplified voltage , Where the adjusted voltage is the amplified voltage.
  • the operational amplifier module 2511 includes an operational amplifier A, which includes a forward input terminal +, a reverse input terminal-, and an output terminal Vout, where the reverse input terminal-is connected to all
  • the coil 22 is electrically connected to detect the induced electromotive force generated by the coil 22.
  • the reverse input terminal is electrically connected to the connection terminal G in FIG. 8 through the resistor R1, and the connection terminal G may be connected to the coil through the first electrode 233 or the second electrode 234 of the fixed terminal 23 22 is electrically connected so that the reverse input terminal can detect the induced electromotive force generated by the coil 22.
  • first electrode 233 and the second electrode 234 of the fixed terminal 23 may be electrically connected to both ends of the circuit (not shown) where the coil 22 is located, or the first terminal of the fixed terminal 23 One of the electrode 233 and the second electrode 234 is electrically connected to the circuit where the coil 22 is located, and the other is grounded.
  • the reverse input terminal- is also electrically connected to the output terminal Vout through a resistor R2.
  • the positive input terminal + is electrically connected to the preset input voltage Ui through a resistor R3, and is grounded through a resistor R4.
  • the current through resistor R1 is equal to the current through resistor R2
  • the current through resistor R3 is equal to the current through resistor R4, so there are:
  • Ug is the induced electromotive force generated by the coil 22
  • U1 is the input voltage of the reverse input terminal
  • Uo is the adjusted voltage output by the output terminal Vout
  • Ui is the preset fixed voltage
  • Uref is the The input voltage at the positive input + is the reference voltage.
  • the signal adjustment circuit 251 may include one or more stages of the operational amplification circuit 2511 to ensure the accuracy of the detection result.
  • the signal adjustment circuit 251 may further include a reverse input terminal of the op amp module 2511 and the coil 22 A stabilizing circuit and a filter circuit (not shown) between the output terminals.
  • the stabilizing circuit and the filter circuit are used to stabilize / stabilize the induced electrical signal generated by the coil 22 to output a stable voltage signal.
  • the filter circuit is used to filter the induced electrical signal generated by the coil 22.
  • the signal adjustment circuit 251 may also have other circuit structures and be used to detect the induced current generated on the coil 22 and perform signal conversion and adjustment on the detected induced current. And output the adjustment voltage.
  • the sampling circuit 252 is electrically connected to the output end of the signal adjustment circuit 251, and is used to sample the adjustment voltage output by the signal adjustment circuit 251 and perform AD conversion, and output a corresponding sampling voltage signal.
  • the value of the preset fixed voltage Ui should be set to be greater than The absolute value of the maximum amplitude of the induced electromotive force generated by the coil 22 ensures that the value of the adjustment voltage Uo is always a positive value.
  • the processor 253 is electrically connected to the sampling circuit 252, and is configured to receive the sampling voltage signal output by the sampling circuit 252, and determine the corresponding value of the sampling voltage signal according to the preset correspondence between the voltage and the bending speed Bending speed. It can be understood that, in other embodiments, the sampling circuit 252 may be omitted and integrated in the processor 253.
  • the coil 22 rotates to perform the motion of cutting the magnetic flux.
  • the relationship between the rate of change of the magnetic flux and the area change of the coil 22 is as follows:
  • B is the magnetic field strength
  • ⁇ S is the amount of change in the projected area of the coil 22 in the magnetic field direction before and after the flexible housing 10 is bent.
  • E is the induced electromotive force
  • n is the number of coil turns of the coil 22
  • ⁇ t is the amount of time change before and after the flexible housing 10 is bent.
  • the change in the projected area of the coil 22 can reflect the level of the induced electromotive force E, that is, the induction
  • the electromotive force E is proportional to the rate of change of the projected area of the coil 22.
  • the bending speed of the flexible housing 10 can reflect the level of the induced electromotive force E.
  • the bending speed of the flexible housing 10 is directly proportional to the induced electromotive force E.
  • the bending speed of the flexible housing 10 The faster, the greater the induced electromotive force / current.
  • the correspondence between the voltage and the bending speed may be preset, and the processor 253 may determine the bending speed corresponding to the sampling voltage signal output by the sampling circuit 252 according to the correspondence.
  • the processor 253 is further configured to determine the bending mode of the flexible housing 10 according to the bending speed, wherein the bending mode includes at least a fast bending mode, a normal bending mode, and a slow bending mode .
  • the processor 253 is further configured to determine the operation mode of the flexible electronic device 100 where the bending speed detection device 20 is located, the application program running on the flexible electronic device 100 according to the determined bending mode, The human-computer interaction interface displayed on the flexible electronic device 100 performs corresponding control.
  • the correspondence between multiple operation modes and multiple bending modes of the flexible electronic device 100 may be preset, and the processor may determine the flexible electronic device 100 according to the correspondence and the determined bending mode. The corresponding operating mode.
  • the processor 253 is further configured to generate corresponding prompt information according to the determined bending mode to prompt the bending mode to which the current bending operation belongs.
  • the processor 253 can also record the alarm frequency and number of times in order to trace back the bending problem of the electronic device at a later stage, for example, to provide data guidance on the bending of the flexible electronic device to facilitate tracking and recording The limit value of the bending of electronic equipment, thereby improving and enhancing the reliability of the equipment.
  • the bending speed detection device 20 of the present application has a simple structure, and can detect the bending speed of the flexible electronic device 100 in real time, quickly and accurately, thereby enhancing the user experience and enriching the flexible electronic device 100 Features.

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  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

本申请提供一种柔性电子设备(100)及其弯曲速度检测装置(20)，所述柔性电子设备(100)包括柔性壳体(10)，所述弯曲速度检测装置(20)设置于所述柔性壳体(10)中。所述弯曲速度检测装置(20)包括极性相反且相对设置的第一磁性件(211)和第二磁性件(212)、线圈(22)、驱动机构(24)以及检测电路(25)。所述线圈(22)可旋转地设置于所述第一磁性件(211)和第二磁性件(212)之间，所述线圈(22)在旋转时做切割磁感线运动并产生感应电流。所述驱动机构(24)在所述柔性壳体(10)发生弯曲时驱动所述线圈(22)旋转。所述检测电路(25)用于检测所述线圈(22)上产生的感应电动势，并根据所述感应电动势确定所述柔性壳体(10)的弯曲速度。

Description

柔性电子设备及其弯曲速度检测装置 技术领域
本申请涉及电子设备技术领域，尤其涉及一种柔性电子设备及其弯曲速度检测装置。
背景技术
目前，移动电子设备己广泛应用于日常生活中。其中，用户可以根据不同的使用场景改变柔性电子设备的形态，使柔性电子设备具有便于使用及携带的优点，并深受用户的喜爱。其中，如何检测柔性电子设备的弯曲速度，以便根据检测的弯曲速度进行相关的控制操作，是业界的一个重要课题。
发明内容
本申请提供一种柔性电子设备及其弯曲速度检测装置，结构简单，并可对所在的柔性电子设备的弯曲速度进行实时、快速、准确地检测。
第一方面，本申请提供一种弯曲速度检测装置，所述弯曲速度检测装置设置于柔性壳体中。所述弯曲速度检测装置包括：
极性相反且相对设置的第一磁性件和第二磁性件；
线圈，可旋转地设置于所述第一磁性件和第二磁性件之间，所述线圈在旋转时做切割磁感线运动并产生感应电流；
驱动机构，固定于所述柔性壳体内，并与所述线圈固定连接，所述驱动机构用于在所述柔性壳体发生弯曲时驱动所述线圈旋转；以及
检测电路，与所述线圈电连接，用于检测所述线圈上产生的感应电动势，并根据检测到的所述感应电动势确定所述柔性壳体的弯曲速度。
第二方面，本申请提供一种电子设备，包括柔性壳体以及上述第一方面所述的弯曲速度检测装置。
本申请的弯曲速度检测装置具有简单的结构，并可对所在的柔性电子设备的弯曲速度进行实时、快速、准确地检测，从而可增强用户的使用体验、丰富所述柔性电子设备的功能。
附图说明
为了更清楚地说明本申请实施方式或现有技术中的技术方案，下面将对实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请的柔性电子设备处于非弯曲状态下的内部结构示意图。
图2为图1所示的IV处的结构的放大示意图。
图3为图2所示的线圈的结构示意图。
图4为图3所示的固定端子与柔性壳体处于连接状态的局部结构示意图。
图5为图1所示的柔性电子设备处于弯曲状态下的内部结构示意图。
图6为图3的线圈的另一视角的结构示意图。
图7为本申请的检测电路的功能模块示意图。
图8为图7的检测电路的电路结构示意图。
具体实施方式
下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。
请参阅图1，为本申请的柔性电子设备100处于非弯曲状态下的内部结构示意图。本申请实施例中的所述柔性电子设备100可包括手机、平板电脑、可穿戴设备、电子书阅读器、播放器等电子产品。如图1所示，所述柔性电子设备100至少包括柔性壳体10以及设置于所述柔性壳体10内部的弯曲速度检测装置20。可以理解的是，所述弯曲速度检测装置20可设置于所述柔性壳体10的可弯曲的部位，以便准确地检测所述柔性壳体10的弯曲速度。
在本实施方式中，所述柔性壳体10包括相对的第一端11和第二端12、以及相对的第一侧面13和第二侧面14，所述第一侧面13和第二侧面14位于所述第一端11和第二端12之间，所述弯曲速度检测装置20设置于所述第一侧面13 和第二侧面14之间。
请参阅图2，所述弯曲速度检测装置20包括相对设置的第一磁性件211和第二磁性件212、线圈22以及驱动机构24，其中，所述第一磁性件211靠近所述第一侧面13设置，所述第二磁性件212靠近所述第二侧面14设置。在本实施方式中，所述第一磁性件211的极性与所述第二磁性件212的极性相反。例如，所述第一磁性件211为N型永磁铁，所述第二磁性件212为S型永磁铁。或者，所述第一磁性件211为S型永磁铁，所述第二磁性件212为N型永磁铁。所述第一磁性件211与所述第二磁性件212之间产生磁场，可以理解的是，所述第一磁性件211与所述第二磁性件212之间的磁感线从N型磁铁出来，并进入S型磁铁中。
所述线圈22可旋转地设置于所述第一磁性件211和第二磁性件212之间，所述线圈22在旋转时做切割磁感线运动并产生感应电流。在本实施方式中，在所述柔性壳体10处于非弯曲状态时，所述线圈22所在的平面分别垂直于所述第一侧面13和第二侧面14。
在本实施方式中，所述弯曲速度检测装置20还包括用于固定所述线圈22的固定端子23，如图3所示，所述固定端子23的延伸方向与所述线圈22所在的平面平行，所述线圈22能够通过所述固定端子23可旋转地固定于所述柔性壳体10内。
所述固定端子23远离所述线圈22的一端设有第一连接部231，所述柔性壳体10上设有与所述第一连接部231匹配的第二连接部15(如图4所示)，所述第一连接部231与第二连接部15连接以将所述线圈22可旋转地固定于所述柔性壳体10上。
其中，所述第一连接部231可以设为锁扣结构，相应地，所述第二连接部15可以设为锁孔结构。
在一种实施方式中，如图3-4所示，所述第一连接部231可为设置于所述固定端子23的端部外表面的至少一个凸起，所述凸起包括一垂直于所述固定端子23且远离所述固定端子23的端面232的抵持面2311。所述第二连接部15可为设于所述柔性壳体10上的收容孔，且所述收容孔的开口处设有抵持壁151，所述凸起插入至所述收容孔中，并能够在所述收容孔中转动，以及通过所述抵持面 2311与所述抵持壁151的内表面抵持，从而将所述线圈22可旋转地固定于所述柔性壳体10内。
在另一种实施方式中，所述第一连接部231可为设置于所述固定端子23的端部的圆台，即围绕所述固定端子23的端部外表面设置的多个所述凸起一体成型而形成所述圆台。
可以理解的是，在其他实施方式中，所述第一连接部231也可以设为所述锁孔结构，相应地，所述第二连接部15可以设为所述锁扣结构。例如，所述第一连接部231可为设置于所述固定端子23的端面232的收容孔，相应地，所述第二连接部15可为设于所述柔性壳体10上的连接轴，且所述连接轴的端部外表面设有至少一个所述凸起或所述连接轴的端部设有所述圆台。
请再次参阅图2-3，所述驱动机构24固定于所述柔性壳体10内，并与所述线圈22固定连接，所述驱动机构24用于在所述柔性壳体10发生弯曲时驱动所述线圈22旋转。
具体地，所述线圈22包括相对的第一侧部221和第二侧部222，在所述柔性壳体10处于非弯曲状态时，所述第一侧部221靠近所述第一磁性件211，所述第二侧部222靠近所述第二磁性件212。
所述驱动机构24包括第一驱动件241与第二驱动件242，所述第一驱动件241的一端与所述线圈22的第一侧部221固定连接，另一端向所述柔性壳体10的第一端11的方向延伸并固定于所述柔性壳体10上。所述第二驱动件242的一端与所述线圈22的第二侧部222固定连接，另一端向所述柔性壳体10的第二端12的方向延伸并固定于所述柔性壳体10上。
在本实施方式中，在所述柔性壳体10处于非弯曲状态下时，所述第一驱动件241的延伸方向与所述第二驱动件242的延伸方向平行，所述固定端子23的延伸方向与所述第一驱动件241和第二驱动件242的延伸方向分别垂直。
在本实施方式中，所述第一驱动件241与第二驱动件242均为弹性件，例如，为弹性连杆或弹簧。所述柔性壳体10在沿所述第一驱动件241和第二驱动件242的延伸方向上设置有多个限位柱16，所述多个限位柱16用于将所述第一驱动件241和第二驱动件242分别限制在预设的位置上，并使所述第一驱动件241和第二驱动件242能够沿预设的路径拉伸与收缩。
请参阅图5，当所述柔性壳体10弯曲时，所述第一驱动件241与第二驱动件242分别发生弹性形变以驱动所述线圈22沿第一方向A1旋转，即，所述线圈22的第一侧部221朝所述柔性壳体10的第一端11的方向旋转，所述线圈22的第二侧部222朝所述柔性壳体10的第二端12的方向旋转，从而使所述线圈22做切割磁感线运动。
可以理解的是，当所述柔性壳体10恢复为非弯曲状态时，所述第一驱动件241与第二驱动件242分别恢复弹性形变以使所述线圈22沿与所述第一方向A1相反的第二方向A2旋转，即，所述线圈22的第一侧部221朝所述柔性壳体10的第二端12的方向旋转，所述线圈22的第二侧部222朝所述柔性壳体10的第一端11的方向旋转，从而使所述线圈22做切割磁感线运动。
请参阅图6，所述固定端子23包括第一电极233和第二电极234，例如正极和负极，所述第一电极233和第二电极234分别与所述线圈22的两个自由端电连接。可以理解的是，所述固定端子23的其他部分可采用绝缘材料，所述线圈22的匝数为n，且n的取值为大于或等于1的整数。
请参阅图7，所述弯曲速度检测装置20还包括检测电路25，所述检测电路25与所述线圈22电连接，用于检测所述线圈22上产生的感应电信号，并根据检测到的所述感应电信号确定所述柔性壳体10的弯曲速度。其中，所述感应电信号包括感应电动势或感应电流。可以理解的是，由于所述线圈22在做切割磁感线运动的过程中导致磁通量发生变化，所述线圈22上会产生感应电动势。当所述线圈22所在的电路形成闭合回路时，所述闭合回路中会有感应电流流过。
具体地，所述检测电路25包括信号调整电路251、采样电路252以及处理器253，所述信号调整电路251通过所述固定端子23的第一电极233或第二电极234与所述线圈22电连接，用于检测所述线圈22产生的感应电信号，以及对检测到的所述感应电信号进行调整后，输出一调整电压。
下面以所述信号调整电路251检测所述线圈22上产生的感应电动势为例，对本申请的技术方案进行介绍。
如图8所示，所述信号调整电路251包括运算放大电路2511，所述运算放大电路2511用于检测所述线圈22产生的感应电动势，以及将检测到的感应电动势放大，并输出一放大电压，其中，所述调整电压即为所述放大电压。
具体地，所述运放模块2511包括运算放大器A，所述运算放大器A包括正向输入端+、反向输入端-和输出端Vout，其中，所述反向输入端-通过电阻R1与所述线圈22电连接，以检测所述线圈22产生的感应电动势。具体地，所述反向输入端-通过电阻R1与图8中的连接端G电连接，所述连接端G可通过所述固定端子23的第一电极233或第二电极234与所述线圈22电连接，从而使所述反向输入端-能够检测到所述线圈22产生的感应电动势。可以理解的是，所述固定端子23的第一电极233和第二电极234可与所述线圈22所在的电路(图未示)的两端电连接，或者，所述固定端子23的第一电极233和第二电极234中的其中一个与所述线圈22所在的电路电连接，另一个接地。
所述反向输入端-还通过电阻R2与所述输出端Vout电连接。所述正向输入端+通过电阻R3与预设输入电压Ui电连接，以及通过电阻R4接地。
由运放的“虚断”概念可知，通过电阻R1的电流等于通过电阻R2的电流，通过电阻R3的电流等于通过电阻R4的电流，故有：
(Ug–U1)/R1＝(U1-Uo)/R2      (1)
(Ui–Uref)/R3＝Uref/R4        (2)
其中，Ug为所述线圈22产生的感应电动势，U1为所述反向输入端-的输入电压，Uo为所述输出端Vout输出的调整电压，Ui为预设的固定电压，Uref为所述正向输入端+的输入电压，即参考电压。
其中，所述电阻R1、R2、R3、R4的阻值相等，结合上面的两个公式(1)和(2)可知，所述正向输入端+的输入电压Uref为：Uref＝Ui/2，所述反向输入端-的输入电压U1为：U1＝(Uo+Ug)/2。
由运放的“虚短”概念可知，Uref＝U1，因此，所述输出端Vout输出的调整电压Uo为：Uo＝Ui-Ug。
可以理解的是，为了避免所述线圈22输出的信号过弱而影响检测结果，所述信号调整电路251可包括一级或多级所述运算放大电路2511，以确保检测结果的准确性。
在其他实施方式中，为了避免所述线圈22输出的信号不稳定而影响检测结果，所述信号调整电路251还可包括设置于所述运放模块2511的反向输入端与所述线圈22的输出端之间的稳定电路和滤波电路(图未示)，所述稳定电路和 滤波电路用于对所述线圈22产生的感应电信号进行稳压/稳流，以输出稳定的电压信号。所述滤波电路用于对所述线圈22产生的感应电信号进行滤波处理。
可以理解的是，在其他实施方式中，所述信号调整电路251也可以具有其他电路结构，并用于检测所述线圈22上产生的感应电流，以及对检测到的感应电流进行信号转换以及调整，并输出所述调整电压。
所述采样电路252与所述信号调整电路251的输出端电连接，用于对所述信号调整电路251输出的调整电压进行采样以及进行AD转换，并输出相应的采样电压信号。
可以理解的是，为了避免所述信号调整电路251输出的调整电压Uo为负值而导致所述采样电路252无法采集到电压信号，所述预设的固定电压Ui的取值应设为大于所述线圈22产生的感应电动势的最大幅值的绝对值，以确保所述调整电压Uo的值始终为正值。
所述处理器253与所述采样电路252电连接，用于接收所述采样电路252输出的采样电压信号，并根据电压与弯曲速度之间的预设对应关系，确定所述采样电压信号对应的弯曲速度。可以理解的是，在其他实施方式中，所述采样电路252可省略，并集成于所述处理器253中。
以下将对所述线圈22产生的感应电动势与弯曲速度之间的对应关系进行具体介绍。
在所述柔性壳体10弯曲的过程中，所述线圈22旋转而做切割磁感线运动，磁通量的变化率和所述线圈22的面积变化关系如下：
Figure PCTCN2018111161-appb-000001
其中，
Figure PCTCN2018111161-appb-000002
为磁通量在所述柔性壳体10弯曲前后的变化量，B为磁场强度，ΔS为所述线圈22在磁场方向的投影面积在所述柔性壳体10弯曲前后的变化量。
所述线圈22产生的感应电动势的计算公式如下：
Figure PCTCN2018111161-appb-000003
其中，E为感应电动势，n为所述线圈22的线圈匝数，Δt为所述柔性壳体10弯曲前后的时间变化量。
结合上面的两个公式(3)和(4)可知，
E＝nBΔS/Δt         (5)
由于线圈匝数n以及磁场强度B均为固定值，由上述公式(5)可看出，所述线圈22的投影面积变化的快慢可反映出所述感应电动势E的高低，即，所述感应电动势E与所述线圈22的投影面积的变化率成正比例关系，所述线圈22的投影面积变化越快，所述感应电动势E的幅值越高。而在所述柔性壳体10的弯曲过程中，所述柔性壳体10的弯曲速度越快，所述线圈22的转动速度也越快，使得所述线圈22的投影面积变化亦越快。因此，所述柔性壳体10的弯曲速度能够反映出所述感应电动势E的高低，所述柔性壳体10的弯曲速度与所述感应电动势E成正比例关系，所述柔性壳体10的弯曲速度越快，所述感应电动势/电流越大。
在具体实施例中，可以预先设置电压与弯曲速度之间的对应关系，所述处理器253根据所述对应关系即可确定所述采样电路252输出的采样电压信号对应的弯曲速度。
在一种实施方式中，所述处理器253还用于根据所述弯曲速度确定所述柔性壳体10的弯曲模式，其中，所述弯曲模式至少包括快速弯曲模式、正常弯曲模式、缓慢弯曲模式。
在一种实施方式中，所述处理器253还用于根据确定的弯曲模式对所述弯曲速度检测装置20所在的柔性电子设备100的操作模式、所述柔性电子设备100上运行的应用程序、所述柔性电子设备100上显示的人机交互界面等进行相应的控制。
例如，可预先设定所述柔性电子设备100的多种操作模式与多种弯曲模式的对应关系，所述处理器根据所述对应关系以及确定的弯曲模式即可确定所述柔性电子设备100的相应操作模式。
在一种实施方式中，所述处理器253还用于根据确定的弯曲模式生成相应的提示信息，以提示当前的弯曲操作所属的弯曲模式。
例如，在确定的弯曲模式为快速弯曲模式时，生成报警信息以对当前的弯曲操作进行报警提示，从而避免用户操作不当而造成对所述柔性电子设备100的损坏，以利于对所述柔性电子设备100的可持续使用、提升用户的使用习惯，从而延长所述柔性电子设备100的使用寿命。可以理解的是，所述处理器253还可记录报警频率和次数，以便于后期对电子设备弯曲问题的追溯，例如，对所述柔性 电子设备的弯曲提供数据指导，便于跟踪和记录所述柔性电子设备弯曲的极限值，从而改善和提升设备的可靠性。
本申请的弯曲速度检测装置20具有简单的结构，并可对所在的柔性电子设备100的弯曲速度进行实时、快速、准确地检测，从而可增强用户的使用体验、丰富所述柔性电子设备100的功能。
最后应说明的是，以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (15)

  1. 一种弯曲速度检测装置，设置于柔性壳体中，其特征在于，所述弯曲速度检测装置包括：
    极性相反且相对设置的第一磁性件和第二磁性件；
    线圈，可旋转地设置于所述第一磁性件和第二磁性件之间，所述线圈在旋转时做切割磁感线运动并产生感应电流；
    驱动机构，固定于所述柔性壳体内，并与所述线圈固定连接，所述驱动机构用于在所述柔性壳体发生弯曲时驱动所述线圈旋转；以及
    检测电路，与所述线圈电连接，用于检测所述线圈上产生的感应电信号，并根据检测到的所述感应电信号确定所述柔性壳体的弯曲速度。
  2. 如权利要求1所述的弯曲速度检测装置，其特征在于，所述弯曲速度检测装置还包括用于固定所述线圈的固定端子，所述固定端子的延伸方向与所述线圈所在的平面平行，所述线圈能够通过所述固定端子可旋转地固定于所述柔性壳体内。
  3. 如权利要求2所述的弯曲速度检测装置，其特征在于，所述固定端子远离所述线圈的一端设有第一连接部，所述柔性壳体上设有与所述第一连接部匹配的第二连接部，所述第一连接部与第二连接部连接以将所述线圈可旋转地固定于所述柔性壳体上。
  4. 如权利要求3所述的弯曲速度检测装置，其特征在于，所述第一连接部为设置于所述固定端子的端部外表面的至少一个凸起，所述凸起包括一垂直于所述固定端子且远离所述固定端子的端面的抵持面；所述第二连接部为设于所述柔性壳体上的收容孔，且所述收容孔的开口处设有抵持壁，所述凸起插入至所述收容孔中，并能够在所述收容孔中转动，以及通过所述抵持面与所述抵持壁的内表面抵持，从而将所述线圈可旋转地固定于所述柔性壳体内。
  5. 如权利要求2所述的弯曲速度检测装置，其特征在于，所述柔性壳体包括相对的第一侧面和第二侧面，所述第一磁性件靠近所述第一侧面设置，所述第二磁性件靠近所述第二侧面设置，其中，在所述柔性壳体处于非弯曲状态时，所述线圈所在的平面分别垂直于所述第一侧面和第二侧面。
  6. 如权利要求5所述的弯曲速度检测装置，其特征在于，所述柔性壳体还包括相对的第一端和第二端，所述第一侧面和第二侧面位于所述第一端和第二端之间；
    所述线圈包括相对的第一侧部和第二侧部，在所述柔性壳体处于非弯曲状态时，所述第一侧部靠近所述第一磁性件，所述第二侧部靠近所述第二磁性件；
    所述驱动机构包括第一驱动件与第二驱动件，所述第一驱动件的一端与所述线圈的第一侧部固定连接，另一端向所述柔性壳体的第一端的方向延伸并固定于所述柔性壳体上；所述第二驱动件的一端与所述线圈的第二侧部固定连接，另一端向所述柔性壳体的第二端的方向延伸并固定于所述柔性壳体上；
    当所述柔性壳体弯曲时，所述第一驱动件与第二驱动件分别发生弹性形变以驱动所述线圈沿第一方向旋转，从而使所述线圈做切割磁感线运动。
  7. 如权利要求6所述的弯曲速度检测装置，其特征在于，在所述柔性壳体处于非弯曲状态下时，所述第一驱动件的延伸方向与所述第二驱动件的延伸方向平行，所述固定端子的延伸方向与所述第一驱动件和第二驱动件的延伸方向分别垂直。
  8. 如权利要求6所述的弯曲速度检测装置，其特征在于，所述柔性壳体在沿所述第一驱动件和第二驱动件的延伸方向上设置有多个限位柱，所述多个限位柱用于将所述第一驱动件和第二驱动件分别限制在预设的位置上，并使所述第一驱动件和第二驱动件能够沿预设的路径拉伸与收缩。
  9. 如权利要求2所述的弯曲速度检测装置，其特征在于，所述固定端子包括第一电极和第二电极，所述第一电极和第二电极分别与所述线圈的两个自由端电连接。
  10. 如权利要求9所述的弯曲速度检测装置，其特征在于，所述检测电路包括：
    信号调整电路，通过所述固定端子的第一电极或第二电极与所述线圈电连接，用于检测所述线圈产生的感应电信号，以及对检测到的所述感应电信号进行信号调整后，输出一调整电压；
    采样电路，与所述信号调整电路的输出端电连接，用于对调整后的电压进行采样以及进行AD转换，并输出相应的采样电压信号；以及
    处理器，与所述采样电路电连接，用于接收所述采样电路输出的采样电压信号，并根据电压与弯曲速度之间的预设对应关系，确定所述采样电压信号对应的弯曲速度。
  11. 如权利要求10所述的弯曲速度检测装置，其特征在于，所述感应电信号为感应电动势，所述信号调整电路包括运算放大电路，所述运算放大电路用于检测所述线圈产生的感应电动势，以及将检测到的感应电动势放大，并输出一放大电压。
  12. 如权利要求10所述的弯曲速度检测装置，其特征在于，所述处理器还用于根据所述弯曲速度确定所述柔性壳体的弯曲模式，其中，所述弯曲模式至少包括快速弯曲模式、正常弯曲模式、缓慢弯曲模式。
  13. 如权利要求12所述的弯曲速度检测装置，其特征在于，所述处理器还用于根据确定的弯曲模式，对所述弯曲速度检测装置所在的柔性电子设备的操作模式、所述柔性电子设备上运行的应用程序、或所述柔性电子设备上显示的人机交互界面进行相应的控制。
  14. 如权利要求12所述的弯曲速度检测装置，其特征在于，所述处理器还用于根据确定的弯曲模式生成相应的提示信息，以提示当前的弯曲操作所属的弯曲模式。
  15. 一种柔性电子设备，包括柔性壳体以及如权利要求1-14任意一项所述的弯曲速度检测装置，所述弯曲速度检测装置设置于所述柔性壳体内。
PCT/CN2018/111161 2018-10-22 2018-10-22 柔性电子设备及其弯曲速度检测装置 WO2020082204A1 (zh)

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