US 12,140,423 B2
Transport device having at least one chain
Christoph Krank, Ichikawa (JP); and Christoph Klör, Wenden (DE)
Assigned to Bühler Gmbh, Reichshof (DE)
Appl. No. 17/998,074
Filed by BÜHLER GMBH, Reischshof (DE)
PCT Filed Apr. 22, 2021, PCT No. PCT/EP2021/060470
§ 371(c)(1), (2) Date Nov. 7, 2022,
PCT Pub. No. WO2021/224012, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 20173731 (EP), filed on May 8, 2020.
Prior Publication US 2023/0175829 A1, Jun. 8, 2023
Int. Cl. B65G 17/00 (2006.01); G01B 7/04 (2006.01); G05B 19/4155 (2006.01)
CPC G01B 7/042 (2013.01) [B65G 17/00 (2013.01); G05B 19/4155 (2013.01); B65G 2203/0283 (2013.01); B65G 2207/48 (2013.01); G05B 2219/34013 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A transport device, having
a. at least one chain, to which measuring marks are attached,
b. an electric drive system having an electric drive for driving the at least one chain, comprising a servo motor and a position sensor, the position sensor being an absolute encoder,
c. a plant control unit,
d. a measuring sensor for detecting the measuring marks, with a switching frequency of greater than 2000/s,
wherein
the plant control unit comprises a first input for receiving measurement data from the measuring sensor and a second input for receiving position data from the position sensor
and wherein the plant control unit is designed,
to receive the measurement data from the measuring sensor and the position data from the position sensor,
to mutually correlate said measurement data and said position data correctly with respect to time,
to determine therefrom lengths between the measurement marks and
to generate a signal which provides information about the quality of the chain,
wherein the transport device comprises a processor unit for data preprocessing, which serves as an input card for the plant control unit and which has an input for the measurement data detected by the measuring sensor and an output for passing the measurement data on to the plant control unit, having an oversampling function for determining a subclock in the event of a signal change at the input, and the plant control unit being designed to allocate a servo position actual value corresponding to a position of the electric drive in the event of a signal change with temporal accuracy.