Patent ID: 11940320
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A method comprising:
determining, by a first load sensor, a first estimated value of a load applied to the first load sensor at a first time;
determining, by the first load sensor, a second measured value indicative of a load applied to the first load sensor at a second time, wherein the second time follows the first time;
calculating, by the first load sensor, a second estimated value of the load applied to the first load sensor at the second time, wherein the second estimated value is calculated based at least in part on the first estimated value;
calculating, by the first load sensor, a first error based at least in part on a difference between the second measured value and the second estimated value;
determining, by the first load sensor, that an absolute value of the first error is at least a first multiple of a predetermined threshold;
in response to determining that the absolute value of the first error is at least the first multiple of the predetermined threshold,
transmitting, by the first load sensor, at least a first set of bits to a computer system over one or more networks, wherein the first set of bits represents the first multiple of the predetermined threshold,
wherein the first set of bits is encoded using a binary code having a first digit, a second digit, a first number of digits in series and a last digit in series, and
wherein the first digit is a one,
wherein the second digit is a one if the first error is positive and a zero if the first error is negative,
wherein the first multiple equals a base of two to a first exponent,
wherein the number of digits between the second digit and the last digit is an integer equal to the first exponent, and
wherein the last digit is a one; and

calculating, by the computer system, a change in the load applied to the first load sensor based at least in part on the first set of bits; and
identifying, by the computer system, an item based at least in part on the change in load applied to the first load sensor.