WO2016115648A1 - 一种单表面位置传感器及其定位方法 - Google Patents

一种单表面位置传感器及其定位方法 Download PDF

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Publication number
WO2016115648A1
WO2016115648A1 PCT/CN2015/000091 CN2015000091W WO2016115648A1 WO 2016115648 A1 WO2016115648 A1 WO 2016115648A1 CN 2015000091 W CN2015000091 W CN 2015000091W WO 2016115648 A1 WO2016115648 A1 WO 2016115648A1
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electrode
peak voltage
curve
surface position
position sensor
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PCT/CN2015/000091
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English (en)
French (fr)
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张海霞
师马跃
陈号天
张进鑫
韩梦迪
苏宗明
孟博
程晓亮
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北京大学
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Priority to US15/542,599 priority Critical patent/US10712893B2/en
Publication of WO2016115648A1 publication Critical patent/WO2016115648A1/zh

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    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature

Definitions

  • the invention relates to a single surface position sensor and a positioning method thereof, in particular to a single surface position sensor based on electrostatic induction, belonging to the technical field of sensors.
  • Position sensor is a widely used sensor, its main applications include touch screen, object positioning and displacement measurement control, etc., especially can significantly improve the level of human-computer interaction, with the advantages of convenience and reliability.
  • the existing sensor is a passive sensor, which has high energy consumption, large volume, low resolution and high cost.
  • the present invention proposes a single surface position sensor based on the principle of static electricity and friction.
  • the technical solution adopted by the present invention to solve the technical problem thereof is:
  • a single surface position sensor is provided, characterized in that
  • the sensing electrode is located above the substrate layer.
  • the senor further includes a friction layer
  • the friction layer is located above the substrate layer;
  • the friction layer is located intermediate the sensing electrode.
  • the senor further includes a friction layer
  • the friction layer is located below the substrate layer.
  • the number of the sensing electrodes is one or more.
  • each of the independent sensing electrodes is grounded through the same load resistance; causing at least one contact and separation between the measured object and the friction layer, generating different voltage outputs on the respective load resistors; analyzing each electrode by analyzing The ratio of the voltages determines the position of the object being measured.
  • a method of locating a single surface position sensor suitable for use in the single surface position sensor comprising:
  • the working area of the sensor is divided into a plurality of test points, and each test point is inductively tested in turn to obtain peak voltage data of each electrode corresponding to each test point;
  • the coordinates of the intersection of the curves L 1 and L 2 are determined as the coordinates of the measured position. Further, the working area of the sensor is divided into a plurality of test points, and each test point is inductively tested in turn to obtain peak voltage data of each electrode corresponding to each test point, including:
  • the working area of the sensor is divided into n*n areas in the horizontal and vertical directions, and n 2 test points are inductively tested in turn, and the peak voltages of the four electrodes corresponding to each test point are obtained;
  • the transverse electrode peak voltage ratio and the longitudinal electrode peak voltage ratio corresponding to each test point are calculated.
  • the horizontal fitting curve of each row is fitted, and the peak voltage data of each electrode corresponding to the test points of each column is fitted to each A vertical fit curve for a column, including:
  • the transverse electrode peak voltage ratio data corresponding to each test point of each row is fitted by the set horizontal fitting formula to obtain a horizontal fitting curve of each row;
  • the longitudinal electrode peak voltage ratio data corresponding to each test point of each column is fitted by the set longitudinal fitting formula, and the longitudinal fitting curve of each column is obtained.
  • the point corresponding to the transverse electrode peak voltage ratio of the measured position on each lateral fitting curve is connected to obtain a curve L 1 ; the ratio of the longitudinal electrode peak voltage of the measured position on each longitudinal fitting curve is Corresponding points are connected to obtain a curve L 2 , including:
  • a specified point is determined on each lateral fitting curve, and the specified points on all the horizontal fitting curves are connected or fitted to obtain a possible curve L 1 of the measured position.
  • a specified point is determined on each longitudinal fitting curve, and the specified points on all the longitudinal fitting curves are connected or fitted to obtain a possible curve L 2 of the measured position.
  • the single surface position sensor proposed by the present invention is an active sensor, which reduces energy usage compared to conventional sensors.
  • the single surface position sensor proposed by the present invention can be fabricated as a flexible transparent film, and can be widely applied to portable electronic devices and wearable devices.
  • the single surface position sensor proposed by the invention has simple process and low cost, and is favorable for large-scale production.
  • the simulation positioning method proposed by the invention has high theoretical reliability, good stability, and is not limited by the array density of sensing, and has high resolution.
  • FIG. 1 is a schematic view showing a three-dimensional structure of a single surface position sensor of the present invention
  • Figure 2 is a plan view of a single surface position sensor of the present invention.
  • Figure 3 is a left side view of the single surface position sensor of the present invention.
  • FIG. 4 is a schematic structural view of a two-dimensional single-surface position sensor with a friction layer under the substrate layer according to the present invention
  • FIG. 5 is a schematic structural diagram of a one-dimensional single surface position sensor according to the present invention.
  • FIG. 6 is a flowchart of processing a positioning method of a single surface position sensor according to an embodiment of the present invention.
  • Embodiment 1 As shown in FIG. 1 to FIG. 3, this embodiment provides a single surface position sensor including a substrate layer 1 and a sensing electrode; the sensing electrode 3, the sensing electrode 4, the sensing electrode 5, and the sensing electrode 6 are located on the substrate layer. 1 above.
  • the senor further comprises a friction layer 2; the friction layer 2 is situated above the substrate layer 1; the friction layer 2 is situated intermediate the sensing electrode 3, the sensing electrode 4, the sensing electrode 5 and the sensing electrode 6.
  • the senor further comprises a friction layer 2; the friction layer 2 is located below the substrate layer 1; the sensing electrode 3, the sensing electrode 4, the sensing electrode 5 and the sensing electrode 6 are located above the substrate layer 1.
  • the number of sensing electrodes of the two-dimensional sensor is two or more; the friction layer 2 is located above the substrate layer 1; and the friction layer 2 is located between the sensing electrode 3 and the sensing electrode 4.
  • the substrate layer 1 is made of polyethylene terephthalate (PET) as a substrate material having a square shape and a side length of preferably 80 mm.
  • PET polyethylene terephthalate
  • the friction layer 2 is polydimethylsiloxane (PDMS) having a square shape and a side length of preferably 60 mm.
  • PDMS polydimethylsiloxane
  • the sensing electrode 3, the sensing electrode 4, the sensing electrode 5, and the sensing electrode 6 are indium tin oxide (ITO) films.
  • the length of the film is preferably 60 mm, the width is preferably 5 mm, and the film thickness is preferably 185 nm.
  • the substrate layer is silicon oxide, glass, parylene, polyamide, polyimide, polytetrafluoroethylene, polycarbonate, polydimethylsiloxane, polyethylene terephthalate. Any kind of insulating material of alcohol ester or polyethylene naphthalate.
  • the friction layer is silicon oxide, glass, parylene, polyamide, polyimide, polytetrafluoroethylene, polycarbonate, polydimethylsiloxane, polyethylene terephthalate. Any of alcohol esters and polyethylene naphthalates having a smooth surface or a surface having a micro/nanostructure; the material is susceptible to charge transfer and insulation upon rubbing.
  • the sensing electrode is any one of a metal, an alloy, a conductive metal oxide, an organic conductive material, graphite, and a conductive nano material.
  • the independent sensing electrodes are grounded through the same load resistance; the measured object and the friction layer are at least once contacted and separated, and different voltage outputs are generated on the respective load resistors; the position of the measured object is determined by analyzing the ratio of the respective electrode voltages.
  • the contact separation with a portion of the friction layer 2 by fingers causes different voltage outputs to be generated at the sensing electrode 3, the sensing electrode 4, the sensing electrode 5, and the sensing electrode 6, respectively.
  • the specific position at which the finger and the friction layer 2 are separated by contact can be determined by measuring the value of the voltage and comparing the relative values of the voltages between the four electrodes.
  • the processing flow of the positioning method of the single surface position sensor provided by the embodiment of the present invention is as shown in FIG. 6 , and includes the following steps:
  • Step S610 The working area of the sensor is divided into a plurality of test points, and each test point is inductively tested in turn to obtain peak voltage data of each electrode corresponding to each test point.
  • the working area of the sensor is divided into n*n areas in the horizontal and vertical directions, and n 2 test points (center coordinates (x, y)) are inductively tested in turn, and the peaks of the four electrodes corresponding to each test point are obtained.
  • Voltage The peak voltages of the left and right electrodes are P 1 and P 2 , respectively, and the peak voltages of the upper and lower electrodes are P 3 and P 4 , respectively;
  • the transverse electrode peak voltage ratio and the longitudinal electrode peak voltage ratio corresponding to each test point are calculated.
  • the calculation formula of the lateral electrode peak voltage ratio can be:
  • Step S620 Calculate a peak voltage ratio of the lateral electrodes corresponding to each test point according to the peak voltage data of each electrode corresponding to the test points of each row, and fit a horizontal fitting curve of each row, corresponding to the test points of each column.
  • the peak voltage data of each electrode is calculated, and the vertical electrode peak voltage ratio corresponding to each test point is calculated, and the longitudinal fitting curve of each column is fitted.
  • the transverse electrode peak voltage ratio data corresponding to each test point of each row is fitted by the set horizontal fitting formula, and the horizontal fitting curve of each row is obtained.
  • the longitudinal electrode peak voltage ratio data corresponding to each test point of each column is fitted by the set longitudinal fitting formula, and the longitudinal fitting curve of each column is obtained.
  • Step S630 connecting points corresponding to the ratios of the peak voltages of the lateral electrodes of the measured positions on each horizontal fitting curve to obtain a curve L 1 ; corresponding to the ratio of the peak voltage of the longitudinal electrodes of the measured position on each longitudinal fitting curve The points are connected to obtain the curve L 2 .
  • a specified point is determined on each lateral fitting curve, and the specified points on all the horizontal fitting curves are connected or fitted to obtain a possible curve L 1 of the measured position.
  • a specified point is determined on each longitudinal fitting curve, and the specified points on all the longitudinal fitting curves are connected or fitted to obtain a possible curve L 2 of the measured position.
  • Step S640 the curve L 1 determines coordinates of the measured position coordinates of the intersection of L 2.
  • the single surface position sensor proposed by the invention is an active sensor, which reduces the energy usage compared with the conventional sensor; the single surface position sensor proposed by the invention can be made into a flexible transparent film, which can be widely applied.
  • the portable electronic device and the wearable device; the single surface position sensor proposed by the invention has simple process and low cost, and is favorable for mass production.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

一种单表面位置传感器及其定位方法，包含衬底层（1）和感应电极（3、4、5、6）；该感应电极（3、4、5、6）位于该衬底层（1）上方；传感器还包含摩擦层（2）；摩擦层（2）位于该衬底层（1）上方；摩擦层（2）位于该感应电极（3、4、5、6）中间；各独立的该感应电极（3、4、5、6）通过相同的负载电阻接地；使被测物体与该摩擦层（2）产生至少一次接触和分离，在各个负载电阻上产生不同的电压输出；通过分析各个电极（3、4、5、6）电压的比值确定被测物体的位置；该单表面位置传感器为主动式传感器，相较于传统传感器减少了能量使用；该单表面位置传感器可制作为柔性透明薄膜，可广泛应用于便携式电子设备及可穿戴设备；该单表面位置传感器工艺简单，成本低。

Description

一种单表面位置传感器及其定位方法 技术领域
本发明涉及一种单表面位置传感器及其定位方法，尤其是一种基于静电感应的单表面位置传感器，属于传感器技术领域。
背景技术
位置传感器是一种广泛应用的传感器，其主要应用包括触摸屏、物体定位与位移测量控制等，尤其可显著提高人机交互水平，具有便捷可靠的优点。位置传感器有两大类，包括接触式和接近式，具体根据工作原理又可分为电容式、电磁式、压电式、光电式、差动变压器式、电涡流式等。
现有的传感器为被动式传感器，耗能高、体积大、分辨率低、成本较高。
现有位置传感器多使用基于传感器阵列的数字化定位技术，根据传感器阵列中感受到刺激的传感器位置来确定位置。这种数字化的传感器定位精度受到传感器阵列密度的限制，且并且对传感器工艺提出较高的要求高，成本高。
发明内容
本发明为了减少传感器耗能，提高分辨率以及降低成本，提出一种基于静电与摩擦原理的单表面位置传感器。本发明解决其技术问题所采用的技术方案是：
根据本发明的一方面，提供了一种单表面位置传感器，其特征在于，
包含衬底层和感应电极；
所述感应电极位于所述衬底层上方。
进一步地，所述传感器还包含摩擦层；
所述摩擦层位于所述衬底层上方；
所述摩擦层位于所述感应电极中间。
进一步地，所述传感器还包含摩擦层；
所述摩擦层位于所述衬底层下方。
进一步地，所述感应电极的数量为一个或一个以上。
进一步地，各独立的所述感应电极通过相同的负载电阻接地；使被测物体与所述摩擦层产生至少一次接触和分离，在所述各个负载电阻上产生不同的电压输出；通过分析各个电极电压的比值确定被测物体的位置。
根据本发明的另一方面，提供了一种单表面位置传感器的定位方法，适用于所述的单表面位置传感器，包括：
将传感器的工作区域划分为多个测试点，依次对每个测试点进行感应测试，得到每个测试点对应的各个电极的峰值电压数据；
根据每一行的测试点对应的各个电极的峰值电压数据，拟合出每一行的横向拟合曲线，根据每一列的测试点对应的各个电极的峰值电压数据，拟合出每一列的纵向拟合曲线；
将每条横向拟合曲线上的被测位置的横向电极峰值电压比值对应的点相连或进行拟合，得到曲线L1；将每条纵向拟合曲线上的被测位置的纵向电极峰值电压比值对应的点相连或进行拟合，得到曲线L2；
将所述曲线L1与L2的交点的坐标确定为所述被测位置的坐标。进一步地，所述的将传感器的工作区域划分为多个测试点，依次对每个测试点进行感应测试，得到每个测试点对应的各个电极的峰值电压数据，包括：
将传感器的工作区域按横向和纵向划分为n*n个区域，依次对n2个测试点进行感应测试，得到每个测试点对应的四个电极的峰值电压；
根据每个测试点对应的四个电极的峰值电压，计算出每个测试点对应的横向电极峰值电压比值和纵向电极峰值电压比值。
进一步地，所述根据每一行的测试点对应的各个电极的峰值电压数据，拟合出每一行的横向拟合曲线，根据每一列的测试点对应的各个电极的峰值电压数据，拟合出每一列的纵向拟合曲线，包括：
根据每一行的每个测试点对应的坐标，通过设定的横向拟合公式对每一行的每个测试点对应的横向电极峰值电压比值数据进行拟合，得到每一行的横向拟合曲线；
根据每一列的每个测试点对应的坐标，通过设定的纵向拟合公式对每一列的每个测试点对应的纵向电极峰值电压比值数据进行拟合，得到每一列的纵向拟合曲线。
进一步地，所述将每条横向拟合曲线上的被测位置的横向电极峰值电压比值对应的点相连得到曲线L1；将每条纵向拟合曲线上的被测位置的纵向电极峰值电压比值对应的点相连得到曲线L2，包括：
在单表面位置传感器上按压需要定位的被测位置，得到被测位置对应的四个电极的峰值电压，计算出被测位置对应的横向电极峰值电压比值和纵向电极峰值电压比值；
根据被测位置对应的横向电极峰值电压比值在每条横向拟合曲线上确定一个指定点，将所有横向拟合曲线上的指定点连接起来或进行拟合，得到被测位置的可能曲线L1；
根据被测位置对应的纵向电极峰值电压比值在每条纵向拟合曲线上确定一个指定点，将所有纵向拟合曲线上的指定点连接起来或进行拟合，得到被测位置的可能曲线L2。
本发明的益处为：
1、本发明提出的单表面位置传感器为主动式传感器，相较于传统传感器减少了能量使用。
2、本发明提出的单表面位置传感器可制作为柔性透明薄膜，可广泛应用于便携式电子设备及可穿戴设备。
3、本发明提出的单表面位置传感器工艺简单，成本低，有利于大规模生产。
4、本发明提出的模拟定位方法理论可靠性高，稳定性好，并且不受传感其阵列密度的限制，分辨率高。
附图说明
图1为本发明的单表面位置传感器三维结构示意图；
图2为本发明单表面位置传感器的俯视图；
图3为本发明单表面位置传感器的左视图；
图4为本发明提供的摩擦层位于衬底层下方的二维单表面位置传感器结构示意图；
图5为本发明提供的一维单表面位置传感器结构示意图；
图6为本发明实施例提供的一种单表面位置传感器的定位方法的处理流程图。
具体实施方式
当结合附图考虑时，通过参照下面的详细描述，能够更完整更好地理解本发明以及容易得知其中许多伴随的优点，但此处所说明的附图用来提供对本发明的进一步理解，构成本发明的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定，如图其中：
显然，本领域技术人员基于本发明的宗旨所做的许多修改和变化属于本发明的保护范围。
实施例1：如图1至图3所示，本实施例提供一种单表面位置传感器，包含衬底层1和感应电极；感应电极3、感应电极4、感应电极5和感应电极6位于衬底层1上方。
在优选方案中，传感器还包含摩擦层2；摩擦层2位于衬底层1上方；摩擦层2位于感应电极3、感应电极4、感应电极5和感应电极6中间。
在优选方案中，如图4所示，传感器还包含摩擦层2；摩擦层2位于衬底层1下方；感应电极3、感应电极4、感应电极5和感应电极6位于衬底层1上方。
在优选方案中，如图5所示，二维传感器的感应电极的数量为两个或两个以上；摩擦层2位于衬底层1上方；摩擦层2位于感应电极3、感应电极4之间。
在优选方案中，衬底层1采用聚对苯二甲酸乙二醇酯(PET)作为衬底材料，形状为正方形，边长优选80mm。
在优选方案中，摩擦层2为聚二甲基硅氧烷(PDMS)，形状为正方形，边长优选为60mm。
在优选方案中，感应电极3、感应电极4、感应电极5、感应电极6为氧化铟锡(ITO)薄膜，薄膜的长度优选为60mm，宽度优选为5mm，膜厚优选为185nm。
在优选方案中，衬底层为氧化硅、玻璃、聚对二甲苯，聚酰胺、聚酰亚胺、聚四氟乙烯、聚碳酸酯、聚二甲基硅氧烷、聚对苯二甲酸乙二醇酯、聚萘二甲酸乙二醇酯任意一种绝缘材料。
在优选方案中，摩擦层为氧化硅、玻璃、聚对二甲苯，聚酰胺、聚酰亚胺、聚四氟乙烯、聚碳酸酯、聚二甲基硅氧烷、聚对苯二甲酸乙二醇酯、聚萘二甲酸乙二醇酯其中任意一种具有光滑表面或具有微纳米结构表面的材料；材料容易在摩擦时产生电荷转移且绝缘。
在优选方案中，感应电极为金属、合金、导电金属氧化物、有机导电材料、石墨、导电纳米材料其中任意一种材料。
工作原理：
各独立的感应电极通过相同的负载电阻接地；使被测物体与摩擦层产生至少一次接触和分离，在各个负载电阻上产生不同的电压输出；通过分析各个电极电压的比值确定被测物体的位置；用手指与摩擦层2的一部分进行接触分离，将在感应电极3、感应电极4、感应电极5、感应电极6分别产生不同的电压输出。通过测量该电压的数值并比较四个电极间的电压相对值可以确定手指与摩擦层2接触分离发生的具体位置。
本发明实施例提供的一种单表面位置传感器的定位方法的处理流程如图6所示，包括如下步骤：
步骤S610、将传感器的工作区域划分为多个测试点，依次对每个测试点进行感应测试，得到每个测试点对应的各个电极的峰值电压数据。
将传感器的工作区域按横向和纵向划分为n*n个区域，依次对n2个测试点(中心坐标为(x，y))进行感应测试，得到每个测试点对应的四个电极的峰值电压：左右电极峰值电压分别为P1、P2，上下电极峰值电压分别为P3、P4；
根据每个测试点对应的四个电极的峰值电压，计算出每个测试点对应的横向电极峰值电压比值和纵向电极峰值电压比值。
示例性的，横向电极峰值电压比值的计算公式可以为：
Figure PCTCN2015000091-appb-000001
纵向电极峰值电压比值的计算公式可以为：
Figure PCTCN2015000091-appb-000002
其中，i＝1，2，3，…，n，j＝1，2，3，…，n。
步骤S620、根据每一行的测试点对应的各个电极的峰值电压数据，计算出每个测试点对应的横向电极峰值电压比值，拟合出每一行的横向拟合曲线，根据每一列的测试点对应的各个电极的峰值电压数据，计算出每个测试点对应的纵向电极峰值电压比，拟合出每一列的纵向拟合曲线。
根据每一行的每个测试点对应的坐标，通过设定的横向拟合公式对每一行的每个测试点对应的横向电极峰值电压比值数据进行拟合，得到每一行的横向拟合曲线。示例性的，横向拟合公式为
Figure PCTCN2015000091-appb-000003
i＝1，2，3，…，n，ai、bi和ki为设定的拟合参数。
根据每一列的每个测试点对应的坐标，通过设定的纵向拟合公式对每一列的每个测试点对应的纵向电极峰值电压比值数据进行拟合，得到每一列的纵向拟合曲线。
示例性的，纵向拟合公式为
Figure PCTCN2015000091-appb-000004
i＝1，2，3，…，n，cj、dj及li为设定的拟合参数。
步骤S630、将每条横向拟合曲线上的被测位置的横向电极峰值电压比值对应的点相连，得到曲线L1；将每条纵向拟合曲线上的被测位置的纵向电极峰值电压比值对应的点相连，得到曲线L2。
在单表面位置传感器上按压需要定位的被测位置，得到被测位置对应的四个电极的峰值电压，计算出被测位置对应的横向电极峰值电压比值和纵向电极峰值电压比值。
根据被测位置对应的横向电极峰值电压比值在每条横向拟合曲线上确定一个指定点，将所有横向拟合曲线上的指定点连接起来或进行拟合，得到被测位置的可能曲线L1。
根据被测位置对应的纵向电极峰值电压比值在每条纵向拟合曲线上确定一个指定点，将所有纵向拟合曲线上的指定点连接起来或进行拟合，得到被测位置的可能曲线L2。
步骤S640、将所述曲线L1与L2的交点的坐标确定为所述被测位置的坐标。
本实施例的技术效果为：本发明提出的单表面位置传感器为主动式传感器，相较于传统传感器减少了能量使用；本发明提出的单表面位置传感器可制作为柔性透明薄膜，可广泛应用于便携式电子设备及可穿戴设备；本发明提出的单表面位置传感器工艺简单，成本低，有利于大规模生产。
以上仅是本发明的一个优选实施例，所述具体实施方式只是用于帮助理解本发明的核心思想。应当指出，对于本技术领域的技术人员而言，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也属于本发明权利要求的保护范围。

Claims (9)

  1. 一种单表面位置传感器，其特征在于，
    包含衬底层和感应电极；
    所述感应电极位于所述衬底层上方。
  2. 根据权利要求1所述的单表面位置传感器，其特征在于，
    所述传感器还包含摩擦层；
    所述摩擦层位于所述衬底层上方；
    所述摩擦层位于所述感应电极中间。
  3. 根据权利要求1所述的单表面位置传感器，其特征在于，
    所述传感器还包含摩擦层；
    所述摩擦层位于所述衬底层下方。
  4. 根据权利要求1任意一项中所述的单表面位置传感器，其特征在于，
    所述感应电极的数量为一个或一个以上。
  5. 根据权利要求1-4任意一项中所述的单表面位置传感器，其特征在于，
    各独立的所述感应电极通过相同的负载电阻接地；使被测物体与所述摩擦层产生至少一次接触和分离，在所述各个负载电阻上产生不同的电压输出；通过分析各个电极电压的比值确定被测物体的位置。
  6. 一种单表面位置传感器的定位方法，适用于权利要求1至5所述的单表面位置传感器，其特征在于，包括：
    将传感器的工作区域划分为多个测试点，依次对每个测试点进行感应测试，得到每个测试点对应的各个电极的峰值电压数据；
    根据每一行的测试点对应的各个电极的峰值电压数据，拟合出每一行的横向拟合曲线，根据每一列的测试点对应的各个电极的峰值电压数据，拟合出每一列的纵向拟合曲线；
    将每条横向拟合曲线上的被测位置的横向电极峰值电压比值对应的点相连或进行拟合，得到曲线L1；将每条纵向拟合曲线上的被测位置的纵向电极峰值电压比值对应的点相连或进行拟合，得到曲线L2；
    将所述曲线L1与L2的交点的坐标确定为所述被测位置的坐标。
  7. 根据权利要求6所述的一种单表面位置传感器的定位方法，其特征在于，所述的将传感器的工作区域划分为多个测试点，依次对每个测试点进行感应测试，得到每个测试点对应的各个电极的峰值电压数据，包括：
    将传感器的工作区域按横向和纵向划分为n*n个区域，依次对n2个测试点进行感应测试，得到每个测试点对应的四个电极的峰值电压；
    根据每个测试点对应的四个电极的峰值电压，计算出每个测试点对应的横向电极峰值电压比值和纵向电极峰值电压比值。
  8. 根据权利要求7所述的一种单表面位置传感器的定位方法，其特征在于，所述根据每一行的测试点对应的各个电极的峰值电压数据，拟合出每一行的横向拟合曲线，根据每一列的测试点对应的各个电极的峰值电压数据，拟合出每一列的纵向拟合曲线，包括：
    根据每一行的每个测试点对应的坐标，通过设定的横向拟合公式对每一行的每个测试点对应的横向电极峰值电压比值数据进行拟合，得到每一行的横向拟合曲线；
    根据每一列的每个测试点对应的坐标，通过设定的纵向拟合公式对每一列的每个测试点对应的纵向电极峰值电压比值数据进行拟合，得到每一列的纵向拟合曲线。
  9. 根据权利要求8所述的一种单表面位置传感器的定位方法，其特征在于，所述将每条横向拟合曲线上的被测位置的横向电极峰值电压比值对应的点相连得到曲线L1；将每条纵向拟合曲线上的被测位置的纵向电极峰值电压比值对应的点相连得到曲线L2，包括：
    在单表面位置传感器上按压需要定位的被测位置，得到被测位置对应的四个电极的峰值电压，计算出被测位置对应的横向电极峰值电压比值和纵向电极峰值电压比值；
    根据被测位置对应的横向电极峰值电压比值在每条横向拟合曲线上确定一个指定点，将所有横向拟合曲线上的指定点连接起来或进行拟合，得到被测位置的可能曲线L1；
    根据被测位置对应的纵向电极峰值电压比值在每条纵向拟合曲线上确定一个指定点，将所有纵向拟合曲线上的指定点连接起来或进行拟合，得到被测位置的可能曲线L2。
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