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In a method and system for monitoring the posture of a user during the use of a training apparatus, sensors are attached to the body of the user and possibly to specific locations of the training apparatus for acquiring specific kinematic parameters. The measurement data acquired by these sensors is

In a method and system for monitoring the posture of a user during the use of a training apparatus, sensors are attached to the body of the user and possibly to specific locations of the training apparatus for acquiring specific kinematic parameters. The measurement data acquired by these sensors is analyzed in an evaluating unit in order to detect a faulty motion or posture of the user during the use of the training apparatus and to emit a corresponding acknowledging message to the user or to the training apparatus in this case.

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In a method and system for monitoring the posture of a user during the use of a training apparatus, sensors are attached to the body of the user and possibly to specific locations of the training apparatus for acquiring specific kinematic parameters. The measurement data acquired by these sensors is

In a method and system for monitoring the posture of a user during the use of a training apparatus, sensors are attached to the body of the user and possibly to specific locations of the training apparatus for acquiring specific kinematic parameters. The measurement data acquired by these sensors is analyzed in an evaluating unit in order to detect a faulty motion or posture of the user during the use of the training apparatus and to emit a corresponding acknowledging message to the user or to the training apparatus in this case. fluid molding material in the die without reference to the actual velocity signal. 3. The apparatus as set forth in claim 2, wherein: the reference pressure signal is a first reference voltage; and the reference velocity signal is a second reference voltage. 4. The apparatus as set forth in claim 2, wherein the servo control circuit includes: a velocity feedback isolation circuit responsive to the actual pressure signal for outputting an isolation signal that changes binary state between the first and second parts of the injection cycle; a pressure error circuit responsive to the isolation signal and the pressure signal for outputting a pressure control signal; a velocity error circuit responsive to the isolation signal and the actual velocity signal for outputting a velocity error control signal; and an injection ram control circuit responsive to the velocity error control signal and the pressure control signal for controlling a velocity the fluid molding material is injected into the die and/or a pressure of the fluid molding material. 5. The apparatus as set forth in claim 4, wherein: the isolation signal changes binary state when, during the injection cycle, the actual pressure signal achieves a predetermined relation to a reference pressure signal; and in response to the isolation signal changing state, the pressure control signal changes from a first reference voltage to a voltage related to the actual pressure signal and the velocity error control signal changes from a voltage related to the actual velocity signal to a second reference voltage. 6. The apparatus as set forth in claim 5, wherein at least one of the first and second reference voltages is electrical ground. 7. The apparatus as set forth in claim 4, further including a switched integrator responsive to the velocity error control signal and the isolation signal for outputting a velocity control signal which is mathematically integrally related to the velocity error control signal during the first part of the injection cycle and which is mathematically proportionally related to the velocity error control signal during the second part of the injection cycle. 8. The apparatus as set forth in claim 2, wherein: the injecting means includes an injection ram for injecting the fluid molding material into the die; and the velocity determining means includes a linear potentiometer having a slider arm coupled to the injection ram for movement therewith and a velocity control circuit connected to the linear potentiometer and responsive to movement of the slider arm for outputting the actual velocity signal related to a velocity of the injection ram. 9. An injection molding apparatus comprising a moveable injection ram for urging fluid molding material into a die, the movement of the injection ram being controlled by a software controlled controller and a closed loop servo control circuit which senses movement of the injection ram and a pressure of the fluid molding material in response to the injection ram urging the fluid molding material into the die during an injection cycle, the servo control circuit responsive to the controller for implementing an integral only control mode for controlling a velocity of the injection ram during a first part of the injection cycle under velocity only feedback control and for implementing a porportional only control mode for controlling the pressure the injection ram exerts on the fluid molding material during a second part of the injection cycle, that is contiguous with the first part of the injection cycle, under pressure only feedback control. 10. The apparatus as set forth in claim 9, wherein: during the first part of the injection cycle, the servo control circuit controls the velocity of the injection ram with reference to a reference pressure signal corresponding to zero or substantially zero pressure of the fluid molding material; and during the second part of the injection cycle, the servo con