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    • 1. 发明专利
    • Speed calculator of moving unit
    • 移动单元的速度计算器
    • JPS59209005A
    • 1984-11-27
    • JP8272583
    • 1983-05-13
    • Hitachi LtdJapanese National Railways
    • SAIJIYOU TAKASHIGEIKEDA HARUOWATANABE KEIICHIROUASAI YASUO
    • G05D13/62B60L13/03B60L15/00H02P25/06H03L7/06
    • B60L15/005Y02T10/645
    • PURPOSE:To output a speed proportional signal accurately followed by the variation of the speed of a moving unit by employing a phase difference at every prescribed distance period to operate a phase correcting unit at the period of integer times and determining the correction output so that the phase difference at the next correcting time point reduces. CONSTITUTION:A speed calculator 3 calculates a speed TLi by a moving unit position signal at every prescribed distance, and stores it in a register 9. On the other hand, a phase difference input unit 7 inputs a position difference Tp at every prescribed period, writes it in a phase difference register 8, and applies the content of the register 8 to a phase correcting unit 4 at every integer time of the phase difference inputting period. The unit 4 calculates a correction value K from two phase differences Tpi, Tpi-1. When the content TLi of the register 9 is lower than the set value, the speed Ti after correction is calculated by TLi+K, while when higher than the set value, the speed Ti-1 after the previous correction is used, and the speed Ti after the correction is calculated by Ti-1+K.
    • 目的:通过在每个规定的距离周期采用相位差来准确地输出速度比例信号,随后移动单元的速度变化,以在整数倍的周期内操作相位校正单元,并确定校正输出,使得 下一个校正时间点的相位差减小。 构成:速度计算器3通过每个规定距离的移动单元位置信号计算速度TLi,并将其存储在寄存器9中。另一方面,相位差输入单元7在每个规定周期输入位置差Tp, 将其写入相位差寄存器8,并且在相位差输入周期的每整个时间将寄存器8的内容应用于相位校正单元4。 单元4从两个相位差Tpi,Tpi-1计算校正值K. 当寄存器9的内容TLi低于设定值时,通过TLi + K计算校正后的速度Ti,而当高于设定值时,使用先前校正之后的速度Ti-1,并且速度 修正后的Ti由Ti-1 + K计算。
    • 3. 发明专利
    • SPEED OPERATING DEVICE OF MOVING BODY
    • JPS57135363A
    • 1982-08-20
    • JP2004681
    • 1981-02-16
    • JAPAN NATIONAL RAILWAYHITACHI LTD
    • SAIJIYOU TAKASHIGEIKEDA HARUOWATANABE KEIICHIROU
    • G01P3/64G01P3/489
    • PURPOSE:To make an output signal exactly follow a speed of a moving body, by disregarding a signal which is not suitable to the actual state, in a speed operating device used for a control device for controlling the moving body such as a vehicle, etc. by outputting a signal being proportional to its speed. CONSTITUTION:A sine wave signal generated from a position signal of every constant distance of a moving body is compared with a feed-back sine wavs signal, and a phase difference is calculated in a phase difference detecting part 6. In case when the phase difference calculated in this way is fetched 7, the phase difference is calculated by providing band width alpha against a temporary mean phase difference 17 of the phase differences 10-15, approving whether the phase differences 10-16 are within the range of the temporary mean phase difference + or -alpha, disregarding the phase difference 13 which is not suitable to the actual state, and using the residual phase differences 10-12, 14 and 15. In this way, correction 4 is executed by use of the phase differences being suitable to the actual state, and it is possible to obtain a signal following a speed of the moving body more exactly.
    • 4. 发明专利
    • ARITHMETIC OPERATION UNIT FOR SPEED OF MOVING BODY
    • JPS5644307A
    • 1981-04-23
    • JP11936679
    • 1979-09-19
    • HITACHI LTD
    • WATANABE KEIICHIROUASAI YASUO
    • B60L3/08B60L13/03B60L15/20G05D1/02H02P25/06
    • PURPOSE:To make the output signals of a moving body controller follow to a moving body with fidelity by a mechanism wherein a phase difference taking-in portion and a phase correcting portion are operated at a period shorter than a period with which a speed arithmetic portion computes speed, and a plurality of minute correction is conducted within the period of the arithmetic portion. CONSTITUTION:The fixed distance passing time TLi of a moving body is computed every specified time interval by means of a speed arithmetic portion 3, and preceding data are rewritten and memorized to a speed register 9. A phase difference taking-in portion 7 takes in phase difference Tpi at a period shorter than a speed arithmetic period, and puts out the phase difference to a phase correcting portion 4. The correcting portion 4 discriminates the rewriting of computing results during time up to this correction from preceding correction, and uses new speed Ti when the speed Ti is memorized to the register 9 and speed Ti-1 after preceding correction when there is no new speed. The phase difference Tpi is multiplied by gain G and speed Ti' after correction is calculated to ensure that difference is reduced at the next correction, and the speed Ti' is put out to a sine-wave generating portion 5. Accordingly, output signals following the movement of the moving body can be obtained in an improved fidelity.