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公开(公告)号：US4914593A
公开(公告)日：1990-04-03
申请号：US204386
申请日：1988-06-09
CPC分类号： G01S7/52006 , E02F3/847 , E02F5/14 , E02F9/2025 , G01S15/88 , G01S2007/52012
摘要： A method and apparatus for automatically controlling the depth of earth grading for utilization with a grader or paver is disclosed. The method includes determination of time taken for an acoustic pulse to travel from a transducer to a reference surface and back, with this value being used to calibrate a microprocessor-controlled distance-measuring device. As the grader moves over a surface to be graded, the distance to the reference surface is constantly detected by a repeated emission and detection of such acoustic pulses. The timing of the echoed pulses is converted to addresses in a look-up table which contains control words symbolizing commands to be given to hydraulic rams carried by the grader. By implementing these commands, the depth of the blade relative to the reference surface is constantly updated, compensating for variations with the height of the reference surface. A thermistor is provided to automatically compensate for temeprature variations as the grading takes place. Displays are provided for the operator of the vehicle to show what type of adjustments are being made to the blade, and whether the height of the reference surface is outside the range of sensitivity of the follower. The follower is automatically calibrated for a given blade depth by repeated incrementation of a delay time variable until a zero adjustment command is generated for the blade control.
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公开(公告)号：US5235511A
公开(公告)日：1993-08-10
申请号：US497982
申请日：1990-03-23
CPC分类号： E02F9/2045 , E02F3/847 , E02F5/14 , G01S15/88 , G01S7/52006 , G01S2007/52012
摘要： A method and apparatus for automatically controlling the depth of earth grading for utilization with a grader or paver is disclosed. The method includes determination of time taken for an acoustic pulse to travel from a transducer to a reference surface and back, with this value being used to calibrate a microprocessor-controlled distance-measuring device. As the grader moves over a surface to be graded, the distance to the reference surface is constantly detected by a repeated emission and detection of such acoustic pulses. The timing of the echoed pulses is converted to addresses in a look-up table which contains control words symbolizing commands to be given to hydraulic rams carried by the grader. By implementing these commands, the depth of the blade relative to the reference surface is constantly updated, compensating for variations with the height of the reference surface. A thermistor is provided to automatically compensate for temperature variations as the grading takes place. Displays are provided for the operator of the vehicle to show what type of adjustments are being made to the blade, and whether the height of the reference surface is outside the range of sensitivity of the follower. The follower is automatically calibrated for a given blade depth by repeated incrementation of a delay time variable until a zero adjustment command is generated for the blade control.
摘要翻译： 公开了一种用于自动控制用于平地机或摊铺机利用的地面分级深度的方法和装置。 该方法包括确定声学脉冲从换能器行进到参考表面和背部的时间，该值用于校准微处理器控制的距离测量装置。 当平地机在待分级的表面上移动时，通过重复发射和检测这种声学脉冲来不断地检测到参考表面的距离。 回波脉冲的定时被转换成查找表中的地址，该查找表中包含指示给分级机承载的液压柱头的命令的控制字。 通过实施这些命令，刀片相对于参考表面的深度不断更新，补偿参考表面高度的变化。 提供热敏电阻以自动补偿随着分级发生的温度变化。 为车辆的操作者提供显示器，以示出对刀片进行什么类型的调整，以及参考表面的高度是否在跟随器的灵敏度范围之外。 通过重复增加延迟时间变量，对于给定的叶片深度，自动校准跟随器，直到为叶片控制产生零调整命令。
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公开(公告)号：US5184293A
公开(公告)日：1993-02-02
申请号：US497981
申请日：1990-03-23
CPC分类号： E02F9/2045 , E02F3/847 , E02F5/14 , G01S15/88 , G01S7/52006 , G01S2007/52012
摘要： A method and apparatus for automatically controlling the depth of earth grading for utilization with a grader or paver is disclosed. The method includes determination of time taken for an acoustic pulse to travel from a transducer to a reference surface and back, with this value being used to calibrate a microprocessor-controlled distance-measuring device. As the grader moves over a surface to be graded, the distance to the reference surface is constantly detected by a repeated emission and detection of such acoustic pulses. The timing of the echoed pulses is converted to addresses in a look-up table which contains control words symbolizing commands to be given to hydraulic rams carried by the grader. By implementing these commands, the depth of the blade relative to the reference surface is constantly updated, compensating for variations with the height of the reference surface. A thermistor is provided to automatically compensate for temperature variations as the grading takes place. Displays are provided for the operator of the vehicle to show what type of adjustments are being made to the blade, and whether the height of the reference surface is outside the range of sensitivity of the follower. The follower is automatically calibrated for a given blade depth by repeated incrementaion of a delay time variable until a zero adjustment command is generated for the blade control.
摘要翻译： 公开了一种用于自动控制用于平地机或摊铺机利用的地面分级深度的方法和装置。 该方法包括确定声学脉冲从换能器行进到参考表面和背部的时间，该值用于校准微处理器控制的距离测量装置。 当平地机在待分级的表面上移动时，通过重复发射和检测这种声学脉冲来不断地检测到参考表面的距离。 回波脉冲的定时被转换成查找表中的地址，该查找表中包含指示给分级机承载的液压柱头的命令的控制字。 通过实施这些命令，刀片相对于参考表面的深度不断更新，补偿参考表面高度的变化。 提供热敏电阻以自动补偿随着分级发生的温度变化。 为车辆的操作者提供显示器，以示出对刀片进行什么类型的调整，以及参考表面的高度是否在跟随器的灵敏度范围之外。 通过延迟时间变量的重复增量自动校准给定的叶片深度，直到为叶片控制产生零调整命令。
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公开(公告)号：US4924374A
公开(公告)日：1990-05-08
申请号：US204541
申请日：1988-06-09
CPC分类号： G01S7/52006 , E02F3/847 , E02F5/14 , G01S15/88 , G01S2007/52012
摘要： A method and apparatus for automaticlly controlling the position of a tool carried by a machine, which in the preferred embodiment may be the blade of a grader or paver for leveling a surface at a chosen depth. The method includes determination of time taken for an acoustic pulse to travel from a transducer to a reference surface and back, with this value being used to calibrate a microprocessor-controlled distance-measuring device. As the grader moves over a surface to be graded, the distance to the reference surface is constantly detected by a repeated emission and detection of such acoustic pulses. The timing of the echoed pulses is converted to addresses in a look-up table which contains control words symbolizing commands to be given to hydraulic rams carried by the grader. By implementing these commands, the depth of the blade relative to the reference surface is constantly updated, compensating for variations with the height of the reference surface. A thermistor is provided to automatically compensate for temperature variations as the grading takes place. Displays are provided for the operator of the vehicle to show what type of adjustments are being made to the blade, and whether the height of the reference surface is outside the range of sensitivity of the follower. The follower is automatically calibrated for a given blade depth by repeated incrementation of a delay time variable until a zero adjustment command is generated for the blade control.
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公开(公告)号：US4918608A
公开(公告)日：1990-04-17
申请号：US204508
申请日：1988-06-09
CPC分类号： E02F5/14 , E02F3/847 , G01S15/88 , G01S7/52006 , G01S2007/52012
摘要： A method and apparatus for automatically controlling the depth of earth grading for utilization with a grader or paver is disclosed. The method includes determination of time taken for an acoustic pulse to travel from a transducer to a reference surface and back, with this value being used to calibrate a microprocessor-controlled distance-measuring device. As the grader moves over a surface to be graded, the distance to the reference surface is constantly detected by a repeated emission and detection of such acoustic pulses. The timing of the echoed pulses is converted to addresses in a look-up table which contains control words symbolizing commands to be given to hydraulic rams carried by the grader. By implementing these commands, the depth of the blade relative to the reference surface is constantly updated, compensating for variations with the height of the reference surface. A thermistor is provided to automatically compensate for temperature variations as the grading takes place. Displays are provided for the operator of the vehicle to show what type of adjustments are being made to the blade, and whether the height of the reference surface is outside the range of sensitivity of the follower. The follower is automatically calibrated for a given blade depth by repeated incrementation of a delay time variable until a zero adjustment command is generated for the blade control.
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