Abstract:
Die Erfindung betrifft ein Verfahren zum Überprüfen eines zeitdiskreten Signalwerts eines Sensors auf Fehlerfreiheit, wobei der Signalwert des Sensors durch zwei unterschiedliche Auswerteeinrichtungen einer Elektronik in einen ersten Messwert und einen zweiten Messwert umgewandelt wird, wobei die ersten und zweiten Messwerte von der Elektronik zu einer Steuerung übertragen und durch die Steuerung aus dem ersten Messwert ein erstes Steuersignal und parallel dazu aus dem zweiten Messwert ein zweites Steuersignal berechnet wird, wobei die Steuerung einen Vergleicher umfasst, welcher das erste Steuersignal und das zweite Steuersignal zur Überprüfung ihrer Identität vergleicht.
Abstract:
The invention relates to a drive unit for automatically actuating a vehicle door, especially the tailgate of a motor vehicle. The inventive drive unit (4) can be connected to the vehicle door (1) or a transmission device (6) via an output shaft (5), said transmission device (6) performing a pivoting movement that corresponds to the pivoting movement of the vehicle door (1). The drive unit (4) comprises at least one first sensor unit (7) that can be connected to an electronic evaluation unit (21) and detects the respective angular position of the vehicle door (1). The aim of the invention is to make use of the advantages of an incremental measurement of the position of the vehicle door (1) without having to wait for the vehicle door (1) to reach its final position to be able to recalibrate following a power outage. Said aim is achieved by dividing the entire pivot angle (alpha) of the vehicle door (1) into at least three successive zones (pivot angle ranges) (alpha1-alpha4), the individual pivot angle ranges (alpha1-alpha4) being determined by a first sensor unit (7) that detects absolute values. The pivot angle of the vehicle door within the individual zones (alpha1-alpha4) is then detected with the aid of a second sensor unit (8) which encompasses at least one incremental measuring transducer.
Abstract:
Aufgabe der Erfindung ist es, eine weitere Vereinfachung und Kostenreduktion für das fehlersichere Erfassen der Messwerte (25) in der Steuereinheit (18) zu ermöglichen. Dabei soll die Fehlersicherheit des Systems nicht reduziert werden. Eine Einrichtung (10) zum fehlersicheren Erfassen von Messwerten (25) in einer Steuereinheit (18) weist einen Geber (11) zum Erfassen von Messsignalen auf. Es sind unabhängig voneinander arbeitende Auswerteeinrichtungen (14,15) zum redundanten Ermitteln von Messwerten (25) aus den Messsignalen des Gebers (11) vorgesehen. Darüber hinaus erfolgt das Übermitteln der Daten an die Steuereinheit mittels fehlersicherer Übermittlungseinrichtungen. Gemäß der Erfindung ist eine erste Auswerteeinrichtung (14) zum Ermitteln eines Messwertes (25) und eine zweite Auswerteeinrichtung (15) zum Ermitteln eines groben Vergleichswertes (27) geringerer Genauigkeit vorgesehen. Darüber hinaus ist eine Einrichtung (10) zum Feststellen der Fehlerfreiheit des Messwertes (25) durch Überprüfen mit dem Vergleichswert (27) vorgesehen.
Abstract:
A control system for positioning a control valve is disclosed. The control system employs first and second control loops, and a plug and seat valve assembly. The first control loop monitors a position or variable of the valve or device being controlled and compares it to a provided setpoint to generate a setpoint for the plug and seat valve. The second control loop compares the measured position of the plug and seat valve to the second setpoint to generate a correction signal to accurately position the plug and seat valve. By employing first and second control loops, the accuracy and responsivenes to which the control valve is positioned is improved.
Abstract:
An automatic ultrasonic wire bonder employs a compliant motion servo (17, 119, 238, 200) on its Z axis drive to maintain a known, constant and steady force applied by the bonding tool (13) to the wire. The tool is resiliently mounted to a carriage (15) that is driven by a force control servo (17, 119, 238, 200). During bonding, the tool is pressed against the wire, and effects of variations in tool tip Z axis position caused by vibration, wire deformation during bonding and other factors of the equipment are minimized by a servo that precisely controls and maintains a fixed position of the carriage relative to the wire to thereby maintain a preselected force between the bonding tool tip and the wire.
Abstract:
The number of signal lines is decreased between a machine tool (1) and a numerical controller (3), and the present position of a mechanical moving portion is correctly recognized at all times on the side of the numerical controller (3). Position detecting means (12) produces a detection signal whenever the mechanical moving portion has moved a predetermined amount, and serial data generating means (16, 17, 18, 19) generate serial data that represent the present position of the mechanical moving portion and the like. Switching means (13) sends out either the detection signal or the serial data onto the same signal line that connects the machine tool (1) and the numerical controller (3) together. Follow-up means (21, 22) reproduce the detection signal produced by the position detecting means (12) while the serial data are being produced, and control means (31, 20) send the detection signal reproduced by the follow-up means (21, 22) to the numerical controller (3) immediately after the serial data have been produced.
Abstract:
Positionssteller, mit einem Aktor (13) und mit einem Steuerungsgerät (14), wobei der Aktor (13) einen Elektromotor (15), einen vom Elektromotor (15) translatorisch verlagerbaren Steller (19) und mehrere Sensoren (20, 21) umfasst, wobei der Aktor (13) und das Steuerungsgerät (14) miteinander gekoppelt sind und Daten austauschen, und wobei in den Aktor (13) eine Auswerteeinrichtung (22) integriert ist, die von allen Sensoren (20, 21) des Aktors (13) Messdaten empfängt, auswertet und an das Steuerungsgerät (14) weiterleitet.
Abstract:
The invention relates to a method for the control and regulation of position deviations of tappets in servoelectric presses. The aim of the invention is especially to influence the position deviations of a tappet during the passage through the lower reversal point in such a way that the depth of immersion and the tilting position of the tappet can be controlled or regulated.
Abstract:
The present invention preferably employs non-contact, small-displacement, capacitive sensors (124, 128, 130, 131, 132) to determine Abbe errors due to the pitch (20), yaw (22), or roll (18) of a near linear mechanical stage (56, 58) that are not indicated by an on-axis position indicator, such as a linear scale encoder or laser interferometer. The system is calibrated against a precise reference standard so the corrections depend only on sensing small changes in the sensor readings and not on absolute accuracy of the sensor readings. Although the present invention is preferred for use in split-axis positioning systems (50) with inertially separated stages (56, 58), the invention can be employed in typical split-axis or stacked stage systems to reduce their manufacturing costs.
Abstract:
A positioning system for moving a device over an xy-plane has a drive mechanism with pivotable arms for moving a carriage over the xy-plane by driving it from one side. This drive mechanism allows the system to be made narrow along the other side.