CN101901089B - Coordinate acquiring device based on variable capacitors - Google Patents

Coordinate acquiring device based on variable capacitors Download PDF

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CN101901089B
CN101901089B CN200910084864A CN200910084864A CN101901089B CN 101901089 B CN101901089 B CN 101901089B CN 200910084864 A CN200910084864 A CN 200910084864A CN 200910084864 A CN200910084864 A CN 200910084864A CN 101901089 B CN101901089 B CN 101901089B
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unit
pressure
pressure sensor
variable capacitance
electrode
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CN200910084864A
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CN101901089A (en
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刘迎建
向国威
宋柏君
王红岗
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汉王科技股份有限公司
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Abstract

The invention relates to a coordinate acquiring device based on variable capacitors, belonging to the field of computer peripheral equipment input. The coordinate acquiring device based on the variable capacitor comprises an amplifying and reshaping unit, a frequency counting unit, a calculating unit, an output data unit and a pressure sensor unit. The pressure sensor unit transmits a pressure signal to the amplifying and reshaping unit for signal amplification, the frequency of the amplified pressure signal is counted in the frequency counting unit, the counting information is sent to the calculating unit for position calculation, and the position information is outputted by the output data unit. The pressure sensor unit comprises at least two pressure sensors, and each pressure sensor comprises an inductor, a fixed capacitor and a variable capacitor. The device accurately measures a touch track by arranging an array of multiple pressure sensors, has simple structure, is convenient for sensing micro force and can rapidly detect the change of pressure and calculate the position of a force point.

Description

基于可变电容的坐标获取装置 Acquisition means based on the coordinates of the variable capacitance

技术领域 FIELD

[0001] 本发明属于计算机的外围设备输入领域,涉及一种坐标获取装置,特别涉及一种基于可变电容的坐标获取装置。 [0001] Peripherals computer FIELD The present invention relates to a coordinate acquiring device, and particularly relates to a variable capacitance based on the coordinate acquisition device.

背景技术 Background technique

[0002] 随着消费电子产品的设计制造水平和用户需求的不断提高,在越来越多的场合需要对各种外界变化的物理量做出测量、控制及响应,其中对于压力的感测就是其中的一种。 [0002] With the increasing user demand for design and manufacturing standards and consumer electronics products, more and more applications need to be made to measure, control and respond to a variety of physical changes in the outside world, which is measured to sense pressure which a. 压感测量有多种技术方案,如压力式触控屏、电阻触控屏、红外式触控屏、电容式触摸屏以及电磁式手写屏等,可以应用在计算机输入设备、电子白板以及手机、PDA、医疗设备等领域,能够实时把压力的变化在显示屏幕上显示出来,以反应使用者操作时的用力情况。 Various techniques sensing pressure measurement schemes, such as a pressure touch screen, resistive touch screen, infrared touch screen, a capacitive touch screen and an electromagnetic screen handwriting like, can be applied to computer input device, whiteboard and mobile phone, PDA field, medical equipment, etc., in real time the change in the pressure is displayed on the display screen, in case where the reaction force of the user operation.

[0003] 专利US4121049公开了一种测量系统,该系统应用电阻应变的原理,把应变片安置在承压面板四个均匀位置,当承压面板在受力时会产生变形。 [0003] Patent No. US4121049 discloses a measurement system, the system works resistance strain application, the four strain gauges arranged in a uniform position pressure panel, when the panel is deformed under pressure when stressed. 因为力的作用点不同而产生的变形也是不一样,从而使应变片产生的信号不同,经过与应变片连接的电路进行处理,计算得到力的作用点的位置。 Because different deformation force generated points is not the same, so that the signal generated by the strain gauge is different through the circuit connected to the strain gauges are processed to obtain the calculated position of the point of force. 该系统虽然已经获取了坐标的位置,但由于测量器件较少,如果用来触控的面板面积较大,则测量存在较大的偏差,精确度较小。 While the system has been acquired positional coordinates, but the measuring device is less, if the touch panel for a large area, there is a big deviation of the measurement accuracy is small.

[0004] 中国专利CN95195866. 6公开了一种电容性传感器,该传感器含有一个具有闭合、连续几何形状的第一导电电极垫和一个第二导电电极的技术方案。 [0004] Chinese Patent No. CN95195866. 6 discloses a capacitive sensor, comprising a sensor which has a closed, conductive electrode pad of the first aspect and a continuous second conductive electrode geometry. 这一种方案也可以通过可变电容来实现坐标的获取,但由于只能测量在限定范围内的面积,对于面积较大的触控板的精确测量比较困难,同时,无法实现受力方向上的更精确的量化测量。 This is a solution acquired coordinates can also be realized by the variable capacitance, but only because the measurement area in the defined range for a large area touchpad is difficult to measure accurately, while the direction of the force can not be achieved more accurate quantitative measurements.

[0005] 专利号为CN87103587的专利中公开了一种压敏技术和器械,是在一个固定电极上分布一个二维阵列的弹性导电电极,在对该装置施加压力时,该电极产生形变从而生成了一系列的动态信号,即得到关于压力变化的情况,这种方法虽然可以采集到较为准确的压力变化情况的信号,但只是对于受力面的局部点进行测量,而无法对受力面的多个点测量,因而无法确定压力点的位置,也不能应用于位移的测量。 [0005] Patent No. CN87103587 discloses a technique and a pressure-sensitive device, a distributed resilient conductive electrode on a two-dimensional array of fixed electrodes, when pressure is applied to the device, this electrode is deformed so as to generate a dynamic range of the signal, i.e. to obtain information on the change in pressure, although this method may be more accurate to capture changes in the pressure signal, but only for topical measured surface stress point, but not on the force receiving surface a plurality of measuring points, and therefore can not determine the position of the pressure points can not be used to measure displacement.

[0006] 还有在专利号为CN02132054. 3的专利中也公开了一种涉及与电容有关的压力测量技术,它包括一基板,在基板上方设置一第一阶悬浮结构及凸块结构,还有一二阶悬浮结构,与基板形成一封闭腔体。 [0006] as well as in Patent No. CN02132054. 3 of the patent discloses also relates to a capacitance-related pressure measurement techniques, which comprises a substrate, a first substrate disposed over the structure and order suspension bump structure, further there is a second order suspension structure, and the substrate is formed a closed chamber. 外界压力改变时,引起位移量的变化来感测电容变量。 When the external pressure change, causing changes in the amount of displacement is sensed variable capacitance. 这种方法敏感性较差,特别是电容差的变化量较小,测量的范围受到一定的限制。 This method is less sensitive, especially the smaller the amount of change in capacitance difference, the range of measurement subject to certain restrictions.

[0007] 因而,目前现有的基于电容的精确压力的技术还不完善,特别是在面积较大和非刚性的表面材料的测量应用方面。 [0007] Thus, based on precise pressure currently available capacitance technology is not perfect, especially in larger measurement applications and non-rigid surface material aspects.

发明内容 SUMMARY

[0008] 本发明提供了一种基于可变电容的坐标获取装置,通过使触控板产生形变来改变可变电容的电容值,经过信号放大后进而计算出产生形变的位置,实现精确的触摸轨迹测量,结构简单,便于感测微力,可快速检测压力的变化以及受力点的位置。 [0008] The present invention provides apparatus for obtaining a capacitance value of the variable capacitance based on the coordinates, to change the variable capacitance generated by the touch panel of the deformation, after the generated signal is amplified and then calculate the position of the deformation, to achieve precise touch trace measurement, simple structure, easy micro force sensing, pressure can be varied and rapid detection of the position of the force point.

[0009] 基于可变电容的坐标获取装置,包含放大整形单元、频率计数单元、计算单元、输出数据单元和压力传感器单元,压力传感器单元将压力信号传递到放大整形单元进行信号放大,放大后的压力信号在频率计数单元中进行频率计数后将计数信息发送到计算单元中进行位置计算,位置信息再通过输出数据单元进行输出。 [0009] Gets the coordinates based on the variable capacitance means comprises amplifying shaping unit, a frequency counting unit, a calculating unit, the output data unit and the pressure sensor unit, the pressure sensor unit is transmitted to the pressure signal shaping means for signal amplification amplification, the amplified after the pressure signal is frequency counting unit counts the frequency count information is transmitted to the position calculation unit calculating position information and then output through data output unit.

[0010] 所述压力传感器单元由至少两个压力传感器组成,每个压力传感器由电感、固定电容和可变电容组成;可变电容由至少一个可变电容单元、触控板和基板组成;可变电容单元以阵列的形式位于基板上,触控板设置在可变电容单元的阵列之上。 [0010] The pressure sensor unit by the at least two pressure sensors, each pressure sensor inductor, variable capacitors and fixed capacitance; variable capacitance of at least one variable capacitive unit, a touch pad and the substrate; together variable capacitor cells positioned in an array on a substrate, a touch panel disposed over the array of the variable capacitance unit.

[0011] 所述可变电容单元的弹性电极上部具有一个传力杆,触控板接触传力杆,传力杆与弹性电极相对,弹性电极、固定电极两端面设置弹性电极引出端子和固定电极引出端子。 [0011] Flexible upper electrode of the variable capacitor unit having a dowel, the dowel contact with the touch panel, the elastic dowel opposing electrode, an elastic electrode, the fixed electrode lead-out electrode both end surfaces of the elastic terminal and the fixed electrode lead terminals.

[0012] 所述弹性电极和电介质之间设置垫片。 Spacer disposed between the [0012] electrode and a dielectric elastic.

[0013] 所述弹性电极与电介质接触的一侧具有多个突起。 [0013] The side of the elastic medium in contact with the electrode having a plurality of projections.

[0014] 所述触控板由柔性材料制成。 The [0014] The touch panel made of flexible material.

[0015] 所述可变电容单元的数量至少为9个。 The number of [0015] variable capacitance unit is at least nine.

[0016] 本发明基于可变电容的坐标获取装置,其有益效果为: [0016] The present invention is a variable capacitance based on the coordinate acquisition device, the beneficial effects:

[0017] I、通过设置多个可变电容单元的阵列和应用低成本高精度的传感器单元,实现精确的触摸轨迹测量,结构简单,便于感测微力,可快速地检测到压力的变化以及计算出受力点的位置。 [0017] I, and by providing an array of low-cost high-precision sensor units use a plurality of variable capacitance elements, touch track accurate measurements, simple structure, easy micro force sensing, can quickly detect the change in pressure and calculating the position of the stress points.

[0018] 2、当用户在一个屏幕或面板上进行书写绘画时,将压力变化测量出来,得到作用点的具体坐标与作用点力。 [0018] 2, when a user to write or draw on the screen of a panel, the pressure change measuring out, particularly to obtain the coordinates of the point of action of the force application point. [0019] 本发明适合应用于计算机输入设备、电子白板、手机、PDA、多媒体交互设备等多种应用领域。 [0019] The present invention is applicable to a variety of applications for computer input device, whiteboard, phone, PDA, multimedia interactive equipment.

附图说明 BRIEF DESCRIPTION

[0020] 图I是本发明的基于可变电容的坐标获取装置的结构框图; [0020] Figure I is a block diagram of the apparatus based on the acquired coordinate variable capacitor according to the invention;

[0021] 图2是本发明的基于可变电容的坐标获取装置中压力传感器原理示意图; [0021] FIG. 2 is acquired based on the coordinates of the variable capacitance device of the present invention in a schematic view of the principle of a pressure sensor;

[0022] 图3是本发明的基于可变电容的坐标获取装置的受力示意图; [0022] FIG. 3 is a schematic view of the variable capacitance based on the acquired device coordinates force to the invention;

[0023] 图4是本发明的基于可变电容的坐标获取装置的俯视示意图; [0023] FIG 4 is acquired based on a variable capacitance device coordinates schematic top view of the present invention;

[0024] 图5是本发明的基于可变电容的坐标获取装置的可变电容单元实施例I的结构示意图; [0024] FIG. 5 is a schematic structural diagram of a variable capacitance unit acquires the variable capacitance device based on the coordinates of the present invention of Example I;

[0025] 图6是本发明的基于可变电容的坐标获取装置的可变电容单元实施例2的结构示意图; [0025] FIG. 6 is a schematic structural diagram of embodiment 2 of the variable capacitance unit acquires the variable capacitance device based on the coordinates of the present invention;

[0026] 图7是本发明的基于可变电容的坐标获取装置的可变电容单元实施例2的弹性电极的仰视结构示意图; [0026] FIG. 7 is a schematic bottom view of the electrode structure of the elastic second embodiment of the variable capacitance unit acquires the variable capacitance device based on the coordinates of the present invention;

[0027] 图8是本发明的基于可变电容的坐标获取装置的计算作用力的示意图。 [0027] FIG. 8 is a schematic diagram of the calculation of the force device based on the acquired coordinate variable capacitor according to the invention.

[0028] 图中:1·压力传感器单元11.压力传感器111.可变电容1110.触控板1111.可变电容单元1112.基板1113.弹性电极1114.电介质1115.固定电极1116.弹性电极引出端子1117.固定电极引出端子1118.垫片1119.传力杆1118' .突起112.固定电容113.电感2.放大整形单元3.频率计数单元4.计算单元5.输出数据单元 [0028] FIG: 1. a pressure sensor 11. The pressure sensor unit 111. The variable capacitance 1110. The variable capacitance touch panel unit 1112. 1111. 1113. Flexible substrate electrode electrically 1115. 1114. 1116. Elastic medium fixed electrode lead-out electrode The fixed electrode terminal lead-out terminal 1117. 1118. 1119. dowel spacer 1118 '. 112. The projection fixed capacitance 113. 2. amplification shaping inductor unit 3. frequency counting unit 4. The computing unit 5. output data unit

具体实施方式[0029] 下面结合附图对本申请的实施方式进行说明。 DETAILED DESCRIPTION [0029] The following embodiments in conjunction with the accompanying drawings of embodiment of the present disclosure will be described.

[0030] 一种基于可变电容的坐标获取的装置,如图I所示,包含放大整形单元2、频率计数单元3、计算单元4、输出数据单元5和压力传感器单元I。 [0030] An apparatus based on the acquired coordinate variable capacitor, as shown in FIG. I, comprising amplifying shaping unit 2, a frequency counting unit 3, the calculation unit 4, the output data unit 5 and the pressure sensor unit I. 压力传感器单元I将压力信号传递到放大整形单元2进行信号放大,放大后的压力信号在频率计数单元3中进行频率计数,并将计数信息发送到计算单元4中进行位置计算,位置信息再通过输出数据单元5进行输出。 The pressure sensor unit I amplifying the pressure signal to the signal amplification shaping unit 2, the amplified pressure signal in the frequency count frequency counting unit 3, and the count information is transmitted to the position calculation unit 4 calculates, by the position information and then output unit 5 outputs data. 各个单元可以由独立的电路元件组成,也可将所有单元集成在集成电路中。 Each unit may be a separate circuit elements, or all units may be integrated in an integrated circuit. 本实施例中采用集成电路实现,所选单片机为STM32F103,则频率计数单元3、计算单元4、输出数 Implemented using an integrated circuit embodiment of the present embodiment, the STM32F103 selected microcontroller, the frequency counting unit 3, 4, the number output unit calculates

据单元5都是集成在单片机上,采集信号与处理数据是通过单片机MCU的IO接口输入和输出的。 According unit 5 is integrated on the single chip, signal acquisition and processing of data by the microcontroller MCU IO interface input and output. 在实际应用中,频率计数单元3往往就是利用单片机中自带的计数器,也可以单独设置计数器。 In practice, a frequency counting unit 3 is often comes with the use of single-chip counter, the counter may be provided separately. 计算单元4为处理器,对由多个压力传感器获得的信号进行处理。 A processor calculating unit 4, the signals obtained by the plurality of pressure sensors is processed. 具体地,计算单元4为由单片机组成的处理单元,如以STM32F103处理器为核心的计算单元。 Specifically, the calculating unit 4 by the processing unit MCU composed STM32F103 computing unit of the processor core. 输出数据单元5为单片机的输出接口。 The output data unit 5 of the output interface of the microcontroller.

[0031] 如图2所示,所述压力传感器单元I由多个压力传感器组成,本实施例中,以一个压力传感器11为例,由电感113、固定电容112和可变电容111组成。 [0031] 2, the pressure sensor unit I consists of a plurality of pressure sensors, in the present embodiment, a pressure sensor 11 to, for example, an inductor 113, fixed capacitor 112 and variable capacitor 111.. 压力传感器11实质上是一个振荡电路,或是类似的可振荡信号的电路。 The pressure sensor 11 is essentially an oscillator circuit, or similar circuit may be the oscillating signal. 本实施例中,电感113、固定电容112和可变电容111并联构成一个振荡电路。 In this embodiment, the inductor 113, fixed capacitor 112 and variable capacitor 111 constitute a parallel oscillating circuit.

[0032] 可变电容111由可变电容单元1111、基板1112和触控板1110组成。 [0032] The variable capacitance 111 variable capacitance unit 1111, a touch panel 1110 and the substrate 1112 composed. 如图3所示,多个可变电容单元位于基板1112上,触控板1110设置在可变电容单元的阵列之上。 3, a plurality of variable capacitive unit located on the substrate 1112, 1110 is provided on the touch panel unit in a variable capacitance array. 触控板1110一般是具有一定形变的平面板,可以是刚性也可以是柔性的。 The touch panel 1110 is generally planar plate having a certain deformation, it may be rigid or may be flexible. 刚性的触控板受外力作用时变形较小,承受力较大,对于坐标的测量误差较大。 Rigid touch pad is less deformed by external force, a greater tolerance for coordinate measurement errors. 柔性触控板局部受力时变形较大,可变电容单元阵列的变化量相对明显,有助于精确测量受力点的位置。 A large deformation, variation of the variable capacitance significantly relative cell array, the position of the force contributes to accurate measurement of local stress points when the flexible touch panel.

[0033] 可变电容单元1111固定在触控板1110的特定位置,本发明实施方式是固定在触控板1110的主要承力面,以等距离阵列分布,阵列的分布数量最少为9个或以上,用以测量触控板1110所承受的压力信息并输出相应的信号,基板1112直到承载和固定的作用。 [0033] The variable capacitance unit 1111 is fixed at a specific position of the touch panel 1110, embodiments of the present invention is fixed to the load-bearing surface of the touch panel 1110, an array of equidistantly distributed, the number of distributed array of a minimum of nine or above, to measure the pressure of the touch panel information is subjected and carries up to 1110 and outputs a signal corresponding to the role of fixing the substrate 1112.

[0034] 如图4所示,当装置处于工作状态时,触控板1110受到不同的压力时,至少一个可变电容单元的电容量发生了变化,引起对应的压力传感器发生变化,使多个压力传感器构成的压力传感器单元I把变化的电路频率信号转化为压力信号传递到放大整形单元2。 [0034] is shown in Figure 4, when the device is in operation, the touch panel 1110 are subjected to different pressures, the at least one variable capacitance element the capacitance changes, causing a corresponding pressure change sensor, a plurality of pressure sensor unit composed of a pressure sensor circuit I changes the signal into a frequency shaping unit 2 is transmitted to the pressure amplifying signals. 如图I所示,放大整形单元2对压力信号进行一个初步放大,过滤掉信号中的噪声后再频率计数单元3中进行频率计数,对频率信号进行计数和统计。 As shown in FIG. I, shaping amplifying unit 2 amplifies a preliminary pressure signal, after filtering out the noise signal frequency counting unit 3 counts the frequency, and the frequency signal counting statistics. 把每一个压力传感器计数所得到的结果先暂存到寄存器,再将计数信息发送到计算单元4中进行位置计算,经过计算单元4的计算和比较,得到每个压力传感器的变化值。 The result of each pressure sensor is counted to obtain the first temporary register, and then count information to the computing unit 4 for calculating the position of, through calculating and comparing the calculated unit 4, to give the change value of each pressure sensor. 其中,由计算单元4进行计算获得的具有变化最大值的压力传感器的位置就是受力位置,或是由计算单元4根据几个不同的压力传感器的输出值进行计算得出受力位置,由输出数据单元5进行输出。 Wherein the position calculation unit 4 by the pressure sensor has a maximum variation is obtained by calculation of the position of force, or the calculating unit 4 calculates the output value of several different pressure sensor location by the force derived from the output 5 outputs data units.

[0035] 所述可变电容单元1111的弹性电极1113上部具有一个传力杆1119,触控板1110接触传力杆1119,传力杆1119与弹性电极1113相对,在弹性电极1113和电介质1114之间设置垫片1118,弹性电极1113、固定电极1115两端面设置弹性电极引出端子1116和固定电极引出端子1117。 [0035] The electrode of the variable capacitor elastic unit 1111 has a upper portion 1113 of the dowel 1119, 1110 in contact with the force-transmitting lever touchpad 1119, 1119 and the elastic dowel opposite electrode 1113, the electrode 1113 and the dielectric elasticity of 1114 provided between the spacer 1118, the resilient electrodes 1113, 1115 end faces the fixed electrode lead-out electrode terminals 1116 provided an elastic and the fixed electrode lead terminal 1117.

[0036] 可变电容单元1111的基本构件是由弹性电极1113、垫片1118、电介质1114和固定电极1115构成,下面在实施例中详细说明。 [0036] The base member 1111 is a variable capacitance element 1113, the spacer 1118, dielectric 1114 and stationary electrode 1115 is made of an elastic electrode, detailed below in the examples. [0037] 在实例一中,如图5所示,传力杆1119是设置在可变电容单元1111、弹性电极1113与触控板1110之间的一个结构件,它可以将触控板1110的受力状态传递到可变电容单元1111的弹性电极1113上。 [0037] In one example, as shown in FIG. 5, the dowel 1119 is provided in the variable capacitance unit 1111, an electrode 1113 and a structural elastic member 1110 between the touch panel, it may be touch panel 1110 force is transmitted to the elastic state variable capacitor electrode 1113 of unit 1111. 弹性电极1113由弹性材料制成,如导电橡胶,具有良好的弹性。 Flexible electrode 1113 is made of an elastic material, such as conductive rubber, having a good elasticity. 为进一步保证精度和减小误差,在弹性电极1113与电介质1114之间设置有垫片1118,由于有垫片1118的存在,弹性电极1113与电介质1114之间,可以产生一些微小的间隙。 To further ensure accuracy and reduce the error between the resilient electrodes 1113 and 1114 is provided with a dielectric spacer 1118, the spacer 1118 because of the presence, between the elastic electrode 1113 and the dielectric 1114, can produce some slight gap. 弹性电极1113产生形变时,可以与电介质1114接触。 Deforms the elastic electrode 1113, 1114 may be in contact with the dielectric. 垫片1118由绝缘材料制成。 Spacer 1118 made of insulating material.

[0038] 当触控板1110上的某点受到压力时,压力通过触控板1110的形变传递到可变电容单元1111的传力杆1119上,在传力杆1119的直接作用下,弹性电极1113发生形变,与电介质1114之间的接触面积也在变化,并且触控板1110所受压力越大,弹性电极1113与电介质1114之间的接触面积也就越大。 [0038] When a point on the touch panel 1110 under pressure, the pressure is transmitted to the dowel 1119 variable capacitance unit 1111 by a deformation of the touch panel 1110, under the direct action of the dowel 1119, the elastic electrode 1113 strain generating area of ​​contact between the dielectric 1114 also changes, and the greater the pressure on the touch panel 1110, the greater the contact area between the elastic electrode 1113 and the dielectric 1114.

[0039] 根据电容的基本原理C= ε (s/d)可知,电容值C分别与介电常数ε、面积s成正t匕,与电介质间的距离d成反比。 [0039] The basic principle of the capacitance C = ε (s / d) can be seen, the capacitance C and the dielectric constant [epsilon], respectively, into the area of ​​s n t dagger, inversely proportional to the distance d between the dielectric. 通常认为空气的介电常数为I或稍大一点。 Typically dielectric constant of air that is I or slightly larger. 在本实施例中,介电常数ε是由电介质22决定的,一般为几百到数千,是一个固定数,在本实施例中假定为1000,d对应的是弹性电极1113和固定电极1115之间的距离,为一个固定值,而变化最大的就是面积S。 In the present embodiment, the dielectric constant ε of the dielectric 22 is determined, typically hundreds to thousands, a fixed number is assumed to be 1000 in the present embodiment, d is the corresponding elastic electrode 1113 and stationary electrode 1115 the distance between the, as a fixed value, the biggest change is the area S.

[0040] 当弹性电极1113与电介质1114没有接触时,两者之间为空气,电容值为Ctl= (s/d)。 [0040] When the elastic electrode 1113 is not in contact with the dielectric 1114, between the air, the capacitance value Ctl = (s / d).

[0041] 当弹性电极1113受到较小压力与电介质1114接触面积较小时,如只有1/10时,由于s 较小,那么C1 = 1000(s/10d) = 100 (s/d) = IOOC00 [0041] When the electrode 1113 by the elastic pressure of the small contact area with the dielectric 1114 is small, such as only 1/10, due to the smaller s, then C1 = 1000 (s / 10d) = 100 (s / d) = IOOC00

[0042] 当弹性电极21受到较大压力与电介质22接触面积较大时,如有全面积的1/2时,那么C2 = 1000 (s/2d) = 500 (s/d) = 500C。 [0042] When the resilient electrodes 21 are subject to greater stress and electrical contact area 22 is larger media such as 1/2 of the total area, then C2 = 1000 (s / 2d) = 500 (s / d) = 500C. = 5C10 = 5C10

[0043] 因而,弹性电极1113与电介质1114之间的接触面积越大,电容变化越大。 [0043] Accordingly, the larger the contact area between the elastic electrode 1113 and the dielectric 1114, the greater the change in capacitance. 相应的,弹性电极1113与固定电极1115之间的电容也就越大。 Accordingly, the capacitance between the resilient electrode and the fixed electrode 1115 1113 greater. 弹性电极1113与固定电极1115分别具有弹性电极引出端子1116和固定电极引出端子1117,可以将相应的电信号接入到电路中去。 Flexible electrodes 1113 and 1115, respectively, the fixed electrode lead-out electrode having a resilient terminal 1116 and the fixed electrode lead terminal 1117 can access to the corresponding electrical signals to the circuit. 本实施例中,为当弹性电极1113与固定电极1115之间的接触面积从最小到最大变化时的电容变化量。 In this embodiment, when the contact area is between the resilient electrodes 1113 and 1115 fixed electrode capacitance variation from minimum to maximum change.

[0044] 作为本发明的第二实施例,如图6所示,可变电容单元1111由弹性电极1113、电介质1114、固定电极1115以及弹性电极引出端子1116和固定电极引出端子1117构成。 [0044] As a second embodiment of the present invention, as shown in Figure 6, the variable capacitance element 1111 of a resilient electrode 1113, a dielectric 1114, stationary electrode 1115 and an elastic electrode lead-out terminals 1116 and 1117 constitute the fixed electrode lead-out terminals. 与第一实施例中不同的是,本实施例中没有垫片1118与传力杆1119。 In the first embodiment except that the shim is not present embodiment, the dowel 1118 and 1119. 如图6所示,在弹性电极1113表面与电介质1114相对的一侧具有多个形状相同、呈阵列排列的突起1118'。 6, 1114 on the side opposite to the surface 1113 of the resilient electrode electrically plurality of media having the same shape, arranged in an array of protrusions 1118 '. 如图7所示,突起1118'与弹性电极1113连为一体,突起1118'与弹性电极1113具有同样的性能,受到触控板1110压力时,能够产生弹性变形。 7, the protrusion 1118 'and the elastic electrode 1113 as a single entity, the protrusion 1118' and the electrode 1113 have the same elastic properties, when subjected to a pressure touch pad 1110 can be elastically deformed. 弹性电极1113直接与触控板1110接触,当受外力使触控板1110产生形变时,形变将通过触控板1110传递到弹性电极1113,并且受力越大,形变越大。 Flexible electrode 1113 in direct contact with the touch panel 1110, when the touch panel 1110 by an external force to deform, the elastic deformation is transmitted to the electrode 1110 through the touch panel 1113, and the greater the force, the greater the deformation.

[0045] 在计算单元4中对压力传感器单元I输出的多个振荡频率信号进行计算。 [0045] calculates a plurality of oscillation frequency signal output from the pressure sensor unit in I calculation unit 4. 计算的过程如下:前述多个振荡频率信号K1〜KN,分别对应触控板1110中相对的多个阵列排列的可变电容单元,即在触控板1110相对垂直的X轴和Y轴方向上,对应有多个可变电容压力单元。 The calculation process is as follows: the plurality of oscillation frequency signal K1~KN, respectively corresponding to the variable capacitance touchpad unit 1110 arranged opposite to the plurality of arrays, i.e., the touch panel 1110 relative to the vertical X axis and the Y-axis direction , corresponding to a plurality of variable capacitance pressure unit.

[0046] 将X轴方向的多个频率信号先发送到频率计数单元3进行频率计数,再送入到计算单元4进行计算,得出X轴方向的差值。 [0046] The plurality of frequency signals transmitted X-axis direction of the first counting unit 3 to the frequency difference between frequency counts, and then fed to the computing unit 4 calculated the X axis direction. 将Y轴方向的多个频率信号采用相同的方法,先发送到频率计数单元3进行频率计数,再送入到计算单元4进行计算,得出Y轴方向的差值。 A plurality of frequency signals Y-axis direction in the same manner, the first frequency is sent to a frequency counting unit counts 3, 4 and then fed to the calculation unit calculates, Y-axis direction obtained difference. 其具体的计算原理如下。 The specific calculation principle as follows.

[0047] 相对垂直的X轴和Y轴构成一个平面直角坐标系,多个可变电容压力传感器所在点即为该平面直角坐标系上的多个固定点XpXfXn, ypyfy。 [0047] relative to the vertical X axis and the Y-axis form a plane rectangular coordinate system, a plurality of variable capacitance pressure sensors is the point where the plurality of fixed points on XpXfXn the plane rectangular coordinate system, ypyfy. . 其中,XpXfXn为χ轴横坐标方向的分力,y轴纵坐标方向上的分力。 Wherein, XpXfXn abscissa axis is a direction component χ, y-axis component in the vertical coordinate direction.

[0048] 当有外力F作用于触控板1110上时,即是作用在由X轴和Y轴构成的平面上,夕卜力F在X轴方向的分力为F (χ),在Y轴方向的分力为F (y),故在X1、X2…Xn点上的分力为F(X1)和F(X2),在y^ynn点上的分力为F(y)和F(y2)。 [0048] When the external force F is applied on the touch panel 1110, i.e., is acting on the plane formed by the X and Y axes, Xi Blake F in the X-axis direction is a component force F ([chi]), in Y axis direction is a component force F (y), so in the X1, X2 ... Xn point on the component force F (the X1) and F (X2), component in the y ^ ynn points is F (Y), and F (y2).

[0049] 如图8所示,图中只画出了四个示意点,实际上在有效范围内的任一点都可以由至少四个点来进行测量。 [0049] As shown in FIG. 8, only schematically shown a four-point, virtually any point within the effective range can be measured by at least four points. [0050] 根据Xl、Xf Xn之间的关系可以得到外力F对应χ轴上的相对位置,其相对位置的计算公式为:F (x) =F(Xi)/(F(X1)+F(X2)+…),同样,根据yi、y^yn之间的关系就可以得到外力F对应在y轴上的相对位置,其相对位置的计算公式为:F(y) =F(Yi)/(F(yi)+F(y2)+…),据此,就可得出外力F作用在触控板1110上的大小及作用点为(F(x),F(y)): [0050] The external force F can be obtained corresponding to the relative position relationship between χ axis of Xl, Xf Xn, its relative position is calculated as: F (x) = F (Xi) / (F (X1) + F ( X2) + ...), similarly, the relationship between the yi, y ^ yn can be obtained corresponding to the relative position of the external force F in the y-axis, the relative position is calculated as: F (y) = F (Yi) / (F (yi) + F (y2) + ...), whereby the size can be obtained and the external force F acts on a point of the touch panel 1110 is (F (x), F (y)):

[0051 ] F (χ) = F (Xi) / (F (X1) +F (X2) +···) [0051] F (χ) = F (Xi) / (F (X1) + F (X2) + ···)

[0052] F(y) =F (y) / (F (Y1) +F (y2) +...) [0052] F (y) = F (y) / (F (Y1) + F (y2) + ...)

[0053] 这样,就根据所得差值得出受力点的信息。 [0053] Thus, the information derived based on the resulting stress points difference. 由以上获得的X轴与Y轴方向的差值,以及在原始状态时的初始值,就可得到触控板1110上外力作用点的位置及大小,并由输出数据单兀5输出。 By the difference X-axis and Y-axis direction obtained above, and an initial value when the original state, can obtain a position and size of the touch panel 1110 on the external force point, and output by the output data unit 5 Wu.

[0054] 本发明结构简单,灵敏度高,具有非常良好的应用价值,适合应用于计算机输入设备、电子白板以及手机、PDA、多媒体交互设备等多种应用领域。 [0054] The present invention is of simple structure, high sensitivity, a very good value, suitable for a variety of applications in computer input devices, and a whiteboard phone, PDA, multimedia interactive equipment.

[0055] 虽然这里只说明了本发明的优选实施例,但其意并非限制本发明的范围、适用性和配置。 [0055] Although described only preferred embodiments of the present invention, but are not intended to limit the scope, applicability, and configuration. 相反,对实施例的详细说明可使本领域技术人员得以实施。 Instead, a detailed description of embodiments of the skilled in the art can be implemented. 应能理解,在不偏离所附权利要求书确定的本发明精神和范围情况下,可对一些细节做适当变更和修改。 It should be understood that the appended claims without departing from the spirit and scope of the present invention is a case where the reading of the specification, can make the appropriate changes and modifications of some details.

Claims (6)

1. 一种基于可变电容的坐标获取装置,包含放大整形单元(2)、频率计数单元(3)、计算单元(4)和输出数据单元(5),其特征在于:还包括压力传感器单元(I),压力传感器单元(I)将压力信号传递到放大整形单元(2)进行信号放大,放大后的压力信号在频率计数单元(3)中进行频率计数后将计数信息发送到计算单元(4)中进行位置计算,位置信息再通过输出数据单元(5)进行输出;所述压力传感器单元(I)由至少两个压力传感器(11)组成,每个压力传感器(11)由电感(113)、固定电容(112)和可变电容(111)组成;可变电容(111)由至少一个可变电容单元(1111)、触控板(1110)和基板(1112)组成;可变电容单元(1111)以阵列的形式位于基板(1112)上,触控板(1110)设置在可变电容单元(1111)的阵列之上。 A variable capacitance based on the coordinate acquisition device, comprising amplifying shaping means (2), a frequency counting unit (3), a calculation unit (4) and data output unit (5), characterized by: further comprising a pressure sensor unit (I), a pressure sensor unit (I) amplifying the pressure signal delivered to the shaping means (2) for signal amplification, the amplified pressure signal after the count information transmission frequency counter to the frequency calculation unit counting unit (3) ( 4) in the position calculation, the position information and then output through data output unit (5); the pressure sensor unit (I) consists of at least two pressure sensors (11), each pressure sensor (11) by the inductor (113 ), fixed capacitance (112) and the variable capacitance (111) composition; variable capacitance (111) by at least one variable capacitive unit (1111), a touchpad (1110) and the substrate (1112) composition; variable capacitance means (1111) of the substrate (1112) in an array on the touch panel (1110) disposed over the array of the variable capacitance means (1111) is.
2.根据权利要求I所述的装置,其特征在于:所述可变电容单元(1111)的弹性电极(1113)上部具有一个传力杆(1119),触控板(1110)接触传力杆(1119),传力杆(1119)与弹性电极(1113)相对,弹性电极(1113)、固定电极(1115)两端面设置弹性电极引出端子(1116)和固定电极引出端子(1117)。 2. The apparatus as claimed in claim I, wherein: the resilient electrode of the variable capacitor unit (1111) to (1113) having a upper portion of the dowel (1119), the touch panel (1110) in contact with the dowel (1119), the dowel (1119) and an elastic electrode (1113) opposing the resilient electrodes (1113), (1115) both end faces of the fixed electrode disposed an elastic electrode lead terminal (1116) and the fixed electrode lead terminal (1117).
3.根据权利要求2所述的装置,其特征在于:所述弹性电极(1113)和电介质(1114)之间设置垫片(1118)。 3. The apparatus according to claim 2, wherein: the spacer is provided (1118) between the resilient electrodes (1113) and dielectric (1114).
4.根据权利要求2所述的装置,其特征在于:所述弹性电极(1113)与电介质(1114)接触的一侧具有多个突起(1118')。 4. The apparatus according to claim 2, wherein: said elastic electrode (1113) and dielectric (1114) having a plurality of projections of the contact side (1118 ').
5.根据权利要求I所述的装置,其特征在于:所述触控板(1110)由柔性材料制成。 5. The apparatus as claimed in claim I, wherein: the touch panel (1110) is made of a flexible material.
6.根据权利要求1-5任一项所述的装置,其特征在于:所述可变电容单元(1111)的数量至少为9个。 6. The apparatus according to any one of claims 1-5, characterized in that: the number of the variable capacitance means (1111) is at least nine.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200950090Y (en) 2006-07-07 2007-09-19 汉王科技股份有限公司 Device for performing vector pressure measurement using capacitance variation
CN101078659A (en) 2006-05-25 2007-11-28 汉王科技股份有限公司 Method and device for measuring vector pressure taking advantage of capacitance change
CN101369180A (en) 2007-08-15 2009-02-18 联想(北京)有限公司 Finger pointing device
CN201465057U (en) 2009-05-25 2010-05-12 汉王科技股份有限公司 Coordinate acquisition device based on variable capacitance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101078659A (en) 2006-05-25 2007-11-28 汉王科技股份有限公司 Method and device for measuring vector pressure taking advantage of capacitance change
CN200950090Y (en) 2006-07-07 2007-09-19 汉王科技股份有限公司 Device for performing vector pressure measurement using capacitance variation
CN101369180A (en) 2007-08-15 2009-02-18 联想(北京)有限公司 Finger pointing device
CN201465057U (en) 2009-05-25 2010-05-12 汉王科技股份有限公司 Coordinate acquisition device based on variable capacitance

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