A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CONCRETE VIBRATOR WITH IDLING MODE
Provided is a concrete vibrator capable of automatically changing the rotational speed of a motor depending on the state of a vibrating tube and suitably avoiding overheating of the motor and a failure due to the motor overheating.Under control of control means 8, the concrete vibrator is operated in a normal mode in which a motor 2 is supplied with driving power having a frequency that can make the motor 2 rotate at a rotational speed suitable for an air bubble removing process, or in an idling mode in which the motor 2 is supplied with driving power having a frequency that can make the motor 2 rotate at a rotational speed lower than the rotational speed in the normal mode. The control means 8 measures, per unit of time, a value of a current that is input to the control means 8 or the motor 2 to record the value in a memory, compares a latest current value to a reference value calculated on the basis of a past measurement value, and further compares an absolute value of the comparison value to a threshold to grasp the state of the vibrating tube so that an operation mode is suitably switched.
CONCRETE VIBRATOR WITH IDLING MODE
Provided is a concrete vibrator capable of automatically changing the rotational speed of a motor depending on the state of a vibrating tube and suitably avoiding overheating of the motor and a failure due to the motor overheating.Under control of control means 8, the concrete vibrator is operated in a normal mode in which a motor 2 is supplied with driving power having a frequency that can make the motor 2 rotate at a rotational speed suitable for an air bubble removing process, or in an idling mode in which the motor 2 is supplied with driving power having a frequency that can make the motor 2 rotate at a rotational speed lower than the rotational speed in the normal mode. The control means 8 measures, per unit of time, a value of a current that is input to the control means 8 or the motor 2 to record the value in a memory, compares a latest current value to a reference value calculated on the basis of a past measurement value, and further compares an absolute value of the comparison value to a threshold to grasp the state of the vibrating tube so that an operation mode is suitably switched.
CONCRETE VIBRATOR WITH IDLING MODE
BETONRÜTTLER MIT LEERLAUFMODUS
VIBRATEUR DE BÉTON À MODE DE RALENTI
SUZUKI SADAHISA (author) / UEDA SHINJI (author) / USHIJIMA HIROTAKA (author) / YAMASHITA KAZUHIRO (author) / SUZUKI MASAKI (author) / ANDO TOMOKAZU (author)
2021-02-03
Patent
Electronic Resource
English