PATENT CLAIM ANALYSIS

Application Number: 15760355
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["180", "206300"]

Abstract:
A power assist device may include a motor, a motor driving circuit, sensors to output signals in accordance with a rotational speed of the wheel, a memory, and a signal processor. The memory stores information of a parameter defining a transfer function that interrelates a total torque to be input to the vehicle and a rotational speed of the wheel, and an inverse transfer function thereof. Based on the inverse transfer function, the signal processor determines an estimated value of total torque from a detected value of rotational speed of the wheel. Moreover, based on the transfer function, the signal processor updates at least a portion of the information of the parameter so that, for example, an error between a detected value of rotational speed of the wheel and an estimated value of rotational speed of the wheel as determined from the estimated value of total torque is reduced.

Claim (Index 1):
A power assist device for a vehicle which includes a wheel and which is driven by a human force, the power assist device comprising:\n a motor to generate a motor torque; a motor driving circuit to supply an electric power to the motor; a sensor to output a signal which is in accordance with a rotational speed of the wheel; a memory storing information of a parameter defining a transfer function that interrelates a total torque to be input to the vehicle and a rotational speed of the wheel, and an inverse transfer function thereof; and a signal processor connected to the memory and the motor driving circuit, wherein, the signal processor (0) receives the signal which is output from the sensor, and determines a detected value of rotational speed of the wheel, (1) reads information of the parameter from the memory, and, based on the inverse transfer function defined by the parameter, determines an estimated value of total torque from the detected value of rotational speed of the wheel, (2) acquires information representing an operating state of the motor, and, based on the information, determines an estimated value of motor torque that is being generated by the motor, (3) determines an estimated value of human torque based on a value which is obtained by subtracting the estimated value of motor torque from the estimated value of total torque, (4) determines a command value for motor torque based on the estimated value of human torque, and inputs the command value for motor torque to the motor driving circuit, and (5) updates at least a portion of the information of the parameter stored in the memory so that an error between the detected value of rotational speed of the wheel and an estimated value of rotational speed of the wheel that is determined from a given torque value based on the transfer function defined by the parameter is reduced.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 90.0
- Lexical Diversity: 2.43284
- Patent Class: 180.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13424943', '11836410', '14539002', '13995769', '13851308']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7617060685362275
- 35 USC 102 Novelty (BERT): 0.474875517558664
- Combined Prediction Score: 0.7330230134384711
- Mean Citation Score: 186.351782
- Max Citation Score: 197.23466
- Similarity Product: 152.9235374072337

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test