Conveyor with a weighing system for weighing cargoes and weighing method thereof

A weighing method of a conveyor, comprising:

• upon detecting an initial interface of a cargo by a sensor, activating an encoder to start to accumulate at least one recording of the encoder, wherein the cargo is conveyed by a conveyance unit comprising a plurality of conveyance sections connected in cascade, wherein each of the plurality of conveyance sections comprises a frame, and the plurality of conveyance sections comprise a first conveyance section, a second conveyance section, a third conveyance section and a fourth conveyance section;
• inputting multiple weight signals to a register, wherein a weighing module is arranged at a bottom part of the conveyor and comprises a plurality of weighing units connected in cascade, wherein each of the plurality of weighing units is provided with a plurality of load cells, the plurality of weighing units at least comprises a first-level to fourth-level weighing units, and the first-level to fourth-level weighing units are stacked in sequence, wherein
• the first-level weighing unit is located under the first conveyance section and comprises a plurality of first support elements arranged under a first frame of the first conveyance section to support the first frame, wherein there is at least one of the load cells arranged between the first frame and each of the first support elements,
• the second-level weighing unit is arranged under the first conveyance section and the second conveyance section, and comprises a plurality of second support elements respectively arranged under the first frame of the first conveyance section and a second frame of the second conveyance section, a first board is arranged between the first-level weighing unit and the second-level weighing unit, wherein there is at least one of the load cells arranged between the first board and each of the second support elements,
• the third-level weighing unit is arranged under the first conveyance section, the second conveyance section and the third conveyance section, and comprises a plurality of third support elements respectively arranged under the first, the second and a third frames of the first conveyance section, the second conveyance section, and the third conveyance section, a second board is arranged between the second-level weighing unit and the third-level weighing unit, wherein there is at least one of the load cells arranged between the second board and each of the third support elements,
• the fourth-level weighing unit is arranged under the first conveyance section, the second conveyance section, the third conveyance section, and the fourth conveyance section, and comprises a plurality of fourth support elements respectively arranged under the first, the second, the third and a fourth frames of the first conveyance section, the second conveyance section, the third conveyance section, and the fourth conveyance section, a third board is arranged between the third-level weighing unit and the fourth-level weighing unit, wherein there is at least one of the load cells arranged between the third board and each of the fourth support elements;
• upon detecting a final interface of the cargo by the sensor, controlling the encoder to terminate the recording and acquiring a length of the cargo, wherein during a period of acquiring the length of the cargo, each of the load cells of the weighing units successively supplies the weight signal of the multiple weight signals to the register, and the register stores the received weight signal, wherein when a new weight signal is inputted by one of the load cells of the weighing units and greater than an originally stored weight signal, the originally stored weight signal is replaced with the new weight signal;
• and
• outputting one of the multiple weight signals corresponding to the length of the cargo from the register to acquire a weight of the cargo.