rocking bedIt is one of the commonly used instruments in the laboratory, and in the past, shaking tables often used analog speed regulation（Potentiometer speed regulation）system（Also known asOpen-loop speed control system），The oscillation speed of the simulated speed control system during the operation of the shaker is easily affected by voltage changesThe microcomputer speed control system can no longer meet the needs of modern laboratory experiments. It adopts a closed-loop control method and uses Hall elements or photoelectric elements to collect the oscillation speed of the shaking table. If the power supply voltage increases, the speed will increase with the increase of voltage. At this time, the signal collected by the Hall element or photoelectric element will increase, and this signal will be sent to the microcontroller for comparison with the set speed. The resulting signal voltage difference will be amplified and converted into an analog control signal, which will reduce the motor voltage, resulting in a decrease in the motor operating speed. Ultimately, the speed will be controlled at the set speed, and vice versa. soMicrocomputer speed regulationsystemAlso known as constant speed control system.
Its advantages are:
●The speed does not vary with changes in power supply voltage.
●Has strong overload resistance.
●It can achieve slow start and slow stop functions of the shaking table, protecting the reagent bottles from damage caused by inertia.
●Capable of real-time display of oscillation speed and oscillation time.
