Abstract: A grinding device includes a housing unit, a filtering unit, a grinding unit and a sensing unit. The filtering unit is mounted in the housing unit and defines a grinding space therein. The grinding unit includes a blade element rotatably mounted in the grinding space for grinding objects disposed in the grinding space, and a driving element operable to drive rotation of the blade element. The sensing unit is for sensing presence of the objects in the grinding space, and is electrically connected to the driving element to output a control signal thereto to stop rotation of the blade element when sensing that the objects in the grinding space are ground fully into powder so that none of the objects is sensed in the grinding space.

Abstract: A slidable Bluetooth earphone includes a main body having a first body with an accommodating space in which a sound transmission device is mounted, a pair of positioning pieces being oppositely protruded from both lengthwise sides of the first body, a second body being formed at a front end of the first body, a resilient arm being formed at each of opposite sides of the second body in a manner to extend backward to the positioning piece, a flange being formed on a bottom of the resilient arm, and a sliding mechanism being mounted between the first body and the second body; a pressing element, mounted on the first body; and a connector, having a main axis penetrating both sides of the first body.

Abstract: A slidable Bluetooth earphone includes a main body having a first body with an accommodating space in which a sound transmission device is mounted, a pair of positioning pieces being oppositely protruded from both lengthwise sides of the first body, a second body being formed at a front end of the first body, a resilient arm being formed at each of opposite sides of the second body in a manner to extend backward to the positioning piece, a flange being formed on a bottom of the resilient arm, and a sliding mechanism being mounted between the first body and the second body; a pressing element, mounted on the first body; and a connector, having a main axis penetrating both sides of the first body

Abstract: A slidable blue tooth earphone device is shown below. By pressing a button to push an oscillating stick, the oscillating stick is rotated. A first retaining portion of a body is detached from a second retaining portion of a slidable element to let a resilient element push the slidable element to make it movie. Via a damping gear meshed with a rack of the slidable element and a guiding track of the slidable element sliding on a guiding channel of a side plate, the slidable element moves forward stably. Thereby, the slidable element moves forward stably and arrives to a predetermined position speedily. Furthermore, due to this design of the blue tooth device will not be easily detached.

Abstract: In the present invention, a Smith predictor enhanced PID controller, SP-PID, is proposed. A tuning parameter Ksp is devised and the SP-PID controller would be gradually transformed from a PID controller to a Smith predictor as Ksp changes from 0 to 1. Properties of the SP-PID are explored and the design procedure is given to ensure a certain degree of robustness. Simulation results clearly indicate that the SP-PID takes advantage of the SP when small modeling error is encountered and it is gradually detuned to a PID controller, a user-friendly controller, when the model quality degrades. Moreover, the controller and its design procedure can be implemented in current process control computers with virtually no extra hardware cost.

Abstract: In the present invention, a Smith predictor enhanced PID controller, SP-PID, is proposed. A tuning parameter Ksp is devised and the SP-PID controller would be gradually transformed from a PID controller to a Smith predictor as Ksp changes from 0 to 1. Properties of the SP-PID are explored and the design procedure is given to ensure a certain degree of robustness. Simulation results clearly indicate that the SP-PID takes advantage of the SP when small modeling error is encountered and it is gradually detuned to a PID controller, a user-friendly controller, when the model quality degrades. Moreover, the controller and its design procedure can be implemented in current process control computers with virtually no extra hardware cost.