Abstract: A handle device may include a handle upper region, a handle lower region disposed below the handle upper region, and a shaft member configured to penetrate the handle upper region and the handle lower region in a region in which the handle upper region and the handle lower region face each other. A screw thread region provided on an outer surface of the shaft member may be configured to be screw-coupled to the handle upper region and/or the handle lower region at a portion where the shaft member penetrates the handle upper region and the handle lower region. The handle upper region may include an upper concave-convex part, and the handle lower region may include a lower concave-convex part. The lower concave-convex part may have a shape corresponding to the upper concave-convex part so that the handle lower region is able to contact the handle upper region.

Abstract: The present disclosure provides a personal mobility device including a personal mobility device body including a first wheel mounted at a front portion and a second wheel mounted at a rear portion with respect to a longitudinal direction of the personal mobility device body. The personal mobility device may include a steering rod that includes an operable handle, and mountable on any one of steering apparatus connectors at the front portion or the rear portion. A load cell assembly may be provided on each of the steering apparatus connectors, and each including a plurality of load cells. The personal mobility device may enable steering control using a low-cost load cell, and facilitate steering in either direction of the personal mobility device.

Abstract: An apparatus for diagnosing a fault of a load cell includes a power supply unit applying power to an input terminal of a plurality of load cells connected in parallel, each of the plurality of load cells including an input terminal and an output terminal, a fault diagnosis resistor being connected to the output terminal, a voltage measurement unit measuring a voltage applied to the fault diagnosis resistor provided in the output terminal of each of the plurality of load cells, after power is applied thereto, and a controller diagnosing a fault of each of the plurality of load cells based on the measured voltage.

Abstract: A system for determining a state of a power relay assembly includes: a power relay assembly for determining electrical connection states of first and second input-output ports; a relay controller outputting a control signal; a battery management system for determining a connection state of the relay and directing a connection state adjustment of the relay; and a voltage sensor for sensing a voltage of the first input-output port and outputting a state signal. By determining the state of the power relay assembly, it is possible to take quick action against trouble by subdividing and distinguishing a type of abnormality of the power relay assembly, and to prevent a larger problem from occurring by diagnosing relay abnormality in advance and quickly taking a fail safe operation.

Abstract: A system for determining a state of a power relay assembly includes: a power relay assembly for determining electrical connection states of first and second input-output ports; a relay controller outputting a control signal; a battery management system for determining a connection state of the relay and directing a connection state adjustment of the relay; and a voltage sensor for sensing a voltage of the first input-output port and outputting a state signal. By determining the state of the power relay assembly, it is possible to take quick action against trouble by subdividing and distinguishing a type of abnormality of the power relay assembly, and to prevent a larger problem from occurring by diagnosing relay abnormality in advance and quickly taking a fail safe operation.