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  • 2021-06-04 00:36:21

    The set of balance calibration system debugging work contents include:

    Six connecting rod (1) parallel mechanism of reset subsystem (structure, measurement and control) and the alignment of laser displacement meter reset measurement subsystem;

    (2) laser tracker to load the initial positioning subsystem debugging;

    (3) a complete set of system of alignment.

    1 6 connecting rod parallel mechanism reset subsystem and reset and laser displacement measurement subsystem of alignment

    Because of the reason of mechanical connection and processing size error, six degrees of freedom of the real axis games have certain error, need calibration experiment platform motion accuracy. Mechanism in the process of actual operation, there are multiple error sources, the six-freedom parallel mechanism reset subsystem kinematics model of kinematic parameters in the control system of Pnom Preal inconsistent to its actual value and institution actual position deviation from the nominal value of the terminal, namely creal indicates cnom, driver error.

    (1) the kinematics calibration

    Leica laser tracker was adopted to realize six degrees of freedom posture information of the moving platform in the test, the actual measurement point distribution is as follows:

    (2) and laser displacement meter reset alignment measurement subsystem

    In under the condition of not adding force, platform arbitrary walk a Angle and position deviation value, testing the effectiveness of the reset logic. Software with a laser displacement meter data calculating load deformation of six degrees of freedom deviation value, planning the platform to reset the loading head position to meet within the error range. The final debugging results, the reset time and indicators, meet the requirements.

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    导航触摸屏校准软件,可以根据需要改名,谢谢使用
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    eGalaxTouch是一款电子触摸屏驱动程序,电子触摸屏幕有时候是需要校准一下才能准确获取坐标点,这款软件可以帮助我们校准触摸屏参数,推荐有需要的用户下载使用。

    校准方法:

    1:下载、安装eGalaxTouch、Android板子连接液晶屏、触摸屏放在Android液晶屏上面、触摸屏USB模块连接PC主机;

    下载后解压直接安装(全部“next”),但是最好不要安装在虚拟机上面,因为下面连接usb接口触摸屏的时候需要安装驱动,win7系统会自动查找,我装的虚拟机wen7安装失败;

    2:双击运行:

    5f5212bd6db58eb2d410cc977a80b3d8.gif

    软件截图1

    3:出现以下界面:

    5f5212bd6db58eb2d410cc977a80b3d8.gif

    软件截图2

    4:连接触摸屏usb接口到PC主机,出现以下界面:

    5f5212bd6db58eb2d410cc977a80b3d8.gif

    软件截图3

    5:单击”工具=》4点校准=》点击屏幕上依次出现的4个点“:

    5f5212bd6db58eb2d410cc977a80b3d8.gif

    软件截图4

    6:OK;

    电阻屏测试方法:

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    触摸屏的线性在此页中罗列以供参考和故障排除的目的。

    2.四点校准

    在触摸屏准确地工作之前它需要校准。当用户感到准确度不够时,可以重新做校准。

    按下此按钮,会弹出校准窗口,引导用户做4点校准。

    当屏幕出现闪烁的X符号时,请准确的按在X符号处,直到X符号不再闪烁时再松开。依照屏幕提示依次点击4处X符号。此外,在窗口底部有一个时间条。请在时间进度条完成之前点击X符号,如果在这期间一直没有点击,校准任务会自动终止。

    3.清除和校准

    按下此按键,将清除25点校准后获得的线性参数,并重新进行4点校准。因为25点校准数据清除之后,4点校准数据将失效,因此它需要重新做四点校准。

    4.线性设置

    线性校准(25或9点)功能是用来补偿触摸屏的线性关系。线性校准完成后,触摸屏的线性将直观的显示在线性曲线窗口。

    按下此按钮,会弹出校准窗口,引导用户做25点校准。

    当屏幕出现闪烁的X符号时,请准确的按在X符号处,直到X符号不再闪烁时再松开。依照屏幕提示依次点击25处X符号。此外,在窗口底部有一个时间条。请在时间进度条完成之前点击X符号,如果在这期间一直没有点击,校准任务会自动终止。

    5.制定测试

    这个功能是用于准确性和性能检查。在触摸屏映射到接触系统,一个新窗口在这个位置会打开如下,用户按“清除”键清除窗口,按“退出”键终止测试。

    展开全文
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  • Devices with absolute axes are those that send positioning data for an axis in a device-specific coordinate range, defined by a minimum and a maximum value.Compare this to relative devices (e.g....

    Devices with absolute axes are those that send positioning data for an axis in a device-specific coordinate range, defined by a minimum and a maximum value.

    Compare this to relative devices (e.g. a mouse) that can only detect directional data, not positional data.

    libinput supports three types of devices with absolute axes:

    multi-touch screens

    single-touch screens

    Touchpads are technically absolute devices but libinput converts the axis values to directional motion and posts events as relative events. Touchpads do not count as absolute devices in libinput.

    For all absolute devices in libinput, the default unit for x/y coordinates is in mm off the top left corner on the device, or more specifically off the device's sensor. If the device is physically rotated from its natural position and this rotation was communicated to libinput (e.g. by setting the device left-handed), the coordinate origin is the top left corner of in the current rotation.

    Handling of absolute coordinates

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    An absolute device that does not provide a valid resolution is considered buggy and must be fixed in the kernel. Some touchpad devices do not provide resolution, those devices are correctly handled within libinput (touchpads are not absolute devices, as mentioned above).

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    ⎛⎝⎜cosθsinθ0−sinθcosθ0xoffyoff1⎞⎠⎟⎛⎝⎜xy1⎞⎠⎟

    θ is the rotation angle. The offsets xoff and yoff are specified in device dimensions, i.e. a value of 1 equals one device width or height. Note that rotation applies to the device's origin, rotation usually requires an offset to move the coordinates back into the original range.

    The most common matrices are:

    90 degree clockwise: ⎛⎝⎜010−100101⎞⎠⎟

    180 degree clockwise: ⎛⎝⎜−1000−10111⎞⎠⎟

    270 degree clockwise: ⎛⎝⎜0−10100011⎞⎠⎟

    reflection along y axis: ⎛⎝⎜−110000101⎞⎠⎟

    See Wikipedia's Transformation Matrix article for more information on the matrix maths. See libinput_device_config_calibration_get_default_matrix() for how these matrices must be supplied to libinput.

    Once applied, any x and y axis value has the calibration applied before it is made available to the caller. libinput does not provide access to the raw coordinates before the calibration is applied.

    Why x/y coordinates are not normalized

    x/y are not given in normalized coordinates ([0..1]) for one simple reason: the aspect ratio of virtually all current devices is something other than 1:1. A normalized axes thus is only useful to determine that the stylus is e.g. at 78% from the left, 34% from the top of the device. Without knowing the per-axis resolution, these numbers are meaningless. Worse, calculation based on previous coordinates is simply wrong: a movement from 0/0 to 50%/50% is not a 45% degree line.

    This could be alleviated by providing resolution and information about the aspect ratio to the caller. Which shifts processing and likely errors into the caller for little benefit. Providing the x/y axes in mm from the outset removes these errors.

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    Devices with absolute axes are those that send positioning data for an axis in a device-specific coordinate range, defined by a minimum and a maximum value.

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    For all absolute devices in libinput, the default unit for x/y coordinates is in mm off the top left corner on the device, or more specifically off the device's sensor. If the device is physically rotated from its natural position and this rotation was communicated to libinput (e.g. by setting the device left-handed), the coordinate origin is the top left corner of in the current rotation.

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    libinput's API only provides the call to map into a single coordinate range. If the coordinate range has an offset, the compositor is responsible for applying that offset after the mapping. For example, if the device is mapped to the right of two outputs, add the output offset to the transformed coordinate.

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    270 degree clockwise: ⎛⎝⎜0−10100011⎞⎠⎟

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    See Wikipedia's Transformation Matrix article for more information on the matrix maths. See libinput_device_config_calibration_get_default_matrix() for how these matrices must be supplied to libinput.

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    展开全文
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