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    • 2. 发明公开
    • Messeinrichtung zur kapazitiven Druckmessung
    • EP1801599A1
    • 2007-06-27
    • EP06025922.3
    • 2006-12-14
    • ATMEL Germany GmbH
    • Moser, HelmutSaile, Thomas
    • G01R27/26G01L9/12H03M1/00
    • G01L9/12G01R27/2605H03M1/0697H03M1/52H03M1/62
    • Die Erfindung betrifft eine Messeinrichtung zur kapazitiven Druck- und/oder Temperaturmessung, insbesondere für Reifendruckkontrollsysteme, mit zumindest einem Sensor, der ein kapazitives Messelement zum Erfassen einer Zustandsgröße aufweist, welches an einem ausgangsseitigen Messknoten des Messelements anliegt, mit zumindest einem nach dem Zweirampenverfahren arbeitenden A/D-Wandler, mit einer Lade-/Entladeschaltung, zum wechselseitigen Aufladen und Entladen des Messelements und zur Erzeugung eines sägezahnartigen Messpotenzials an dem Messknoten als Maß für die Kapazität des Messelements, mit einem Periodenzähler, der die Perioden des Messpotenzials ermittelt, mit einem Taktzähler, der die Takte eines Taktsignals ermittelt, die innerhalb der Dauer zumindest einer Periode des Messpotenzials liegen. Die Erfindung betrifft ein Messverfahren zur kapazitiven Druck- und/oder Temperaturmessung.
    • 传感器具有用于检测状态值的测量元件。 模拟/数字(A / D)转换器根据双斜率法进行操作。 充电/放电电路对测量元件进行充电和放电,并在测量节点处产生锯齿测量电位作为元件电容的量度。 周期计数器确定测量电位的周期,时钟计数器确定位于测量电位持续时间内的时钟信号的周期。 轮胎压力控制系统的电容式压力测量的测量方法还包括独立权利要求。
    • 3. 发明授权
    • A-D converter having nonlinear characteristics
    • A-D转换器具有非线性特性
    • US4110746A
    • 1978-08-29
    • US697897
    • 1976-06-21
    • Hikaru FurukawaMasakazu MitamuraKenji Higuchi
    • Hikaru FurukawaMasakazu MitamuraKenji Higuchi
    • G01D3/02G01D5/249G01R15/00H03M1/00H03K13/02
    • H03M1/62H03M1/52
    • Disclosed is an A-D converter in which a voltage to be measured is subjected to first integration for a certain period of time; a reference voltage of the opposite polarity from the voltage to be measured is subjected to second integration until the integrated value obtained by the first integration returns to a predetermined value; measuring clock pulses are counted by a counter circuit in the period of the second integration; and the voltage to be measured is converted by the count value of the counter circuit into a digital value. In the A-D converter, there are provided a variable frequency divider and a memory having stored therein frequency dividing ratio determining signals for changing the frequency dividing ratio of the variable frequency divider. In the period of the second integration, the measuring clock pulses are supplied to the counter circuit through the variable frequency divider and each time the clock pulse is obtained, the frequency dividing ratio determining signals are each detected from the memory and preset in the variable frequency divider. And each time the number of clock pulses supplied to the counter circuit exceeds a certain number, the address of the memory is stepped by one. As a result of this, the frequency dividing ratio of the variable frequency divider sequentially changes, by which is obtained a digital converted value conforming to a non-linear characteristic of the voltage to be measured.
    • 公开了一种A-D转换器,其中待测电压经过一定时间的第一积分; 将要测量的电压相反极性的参考电压进行第二积分,直到通过第一积分获得的积分值返回到预定值; 测量时钟脉冲在第二次积分期间被计数器电路计数; 并且要测量的电压被计数器电路的计数值转换成数字值。 在A-D转换器中,提供了可变分频器和存储器,其中存储有用于改变可变分频器的分频比的分频比确定信号。 在第二积分期间,通过可变分频器将测量时钟脉冲提供给计数器电路,并且每当得到时钟脉冲时,分频比确定信号各自从存储器检测并以可变频率预设 分隔线 并且每次提供给计数器电路的时钟脉冲的数量超过一定数量时,存储器的地址被加1。 结果,可变分频器的分频比依次变化,由此获得符合待测电压的非线性特性的数字转换值。
    • 6. 发明授权
    • Digital signal linearizer
    • 数字信号线性化
    • US3662163A
    • 1972-05-09
    • US3662163D
    • 1970-08-04
    • GEN ELECTRIC
    • MILLER DAVID EHEIL ROBERT C
    • G06F7/68G06F17/17H03M1/00G06F15/34H03K13/20
    • G06F7/68G06F17/17H03M1/62
    • A digital signal linearizer for obtaining a linear digital output from a non-linear input. The input voltage is a non-linear representation of a quantity, such as temperature as measured by a thermocouple sensor. A voltage controlled oscillator converts the input voltage to a pulse train having a pulse rate which is a linear representation of the input voltage, but like the input voltage, is a non-linear representation of the measured quantity. The pulses are connected through a NAND gate to programmable divided by N frequency divider for fixed repeated intervals. Hence, the number of pulses passed depends directly on the repetition rate of the oscillator output pulses. Since the voltage, and hence pulse rate v. Quantity measured characteristics of the sensor are known, the divider is programmed to provide a division factor n which varies over different segment of the range of interest so that the output pulse count from the divider is linearly related to the quantity being measured.
    • 一种用于从非线性输入获得线性数字输出的数字信号线性化器。 输入电压是由热电偶传感器测量的量的非线性表示,例如温度。 压控振荡器将输入电压转换为具有作为输入电压的线性表示的脉冲速率的脉冲串,但是与输入电压一样,是测量量的非线性表示。 脉冲通过NAND门连接到可编程DIVIDED N分频器,用于固定的重复间隔。 因此,通过的脉冲数取决于振荡器输出脉冲的重复率。 由于电压,因此脉冲速率v。传感器的量测量特性是已知的,所以分频器被编程以提供在感兴趣范围的不同段上变化的分频因子n,使得来自分频器的输出脉冲计数为线性 与被测量相关。
    • 10. 发明授权
    • Analogue to digital conversion device
    • 模拟数字转换设备
    • US09246507B2
    • 2016-01-26
    • US14669052
    • 2015-03-26
    • DENSO CORPORATION
    • Tomohito Terazawa
    • H03M1/60H03M1/14H03M1/62
    • H03M1/146H03M1/502H03M1/60H03M1/62
    • An A/D conversion device has an A/D conversion section including A/D conversion units. Each A/D conversion unit has a pulse delay circuit including delay units connected in daisy chain to form a ring delay line. Each delay unit delays a pulse signal by a delay time corresponding to an input voltage. The A/D conversion section counts the number of pulse signals that passed through the delay units during a period counted from a timing when a start signal is switched to an activation level from a non-activation level at a timing when a sampling signal is received. When each two successive timing signals CKi (i=1, 2, . . . and m) have a same specific period. The each two successive timing signals have a different phase shifted by 1/m of the specific period. Each A/D conversion unit receives the timing signal CK1 as the start signal, and the timing signal CKi+1 (CKm+1=CK1) as the sampling signal.
    • A / D转换装置具有包括A / D转换单元的A / D转换部。 每个A / D转换单元具有脉冲延迟电路,包括以菊花链连接的延迟单元以形成环延迟线。 每个延迟单元将脉冲信号延迟与输入电压对应的延迟时间。 A / D转换部分在从接收到采样信号的定时处的非激活电平切换到启动电平的定时期间计数的周期期间,计数通过延迟单元的脉冲信号的数量 。 当每两个连续定时信号CK i(i = 1,2,...和m)具有相同的特定周期时。 每两个连续的定时信号具有不同的相位移位特定周期的1 / m。 每个A / D转换单元接收定时信号CK1作为起始信号,定时信号CKi + 1(CKm + 1 = CK1)作为采样信号。