A system that combines an integrated circuit, sensors, and a detectable material on a device. The sensors are generally capable of detecting the presence of multiple substrates as well as their orientation relative to each other. In example embodiments, the sensors can also detect the velocity and direction of motion of the detectable material. In an example mode of use, the system is installed in a children's device, such as an interactive book. The detectable material is embedded in each page of the book such that the sensors can determine which page the book is open to the user. The integrated circuit can process the page open information to produce an output, such as a sound from a speaker.

A key control device and a key control method are disclosed. The key control device includes: an encoder circuit including a first output terminal and a second output terminal and configured to output a first voltage signal and a second voltage signal through the first output terminal and the second output terminal respectively, under triggering of a rotational operation; a first interface extension circuit configured to receive the first voltage signal and the second voltage signal, and generate an interrupt signal and voltage state transition data in response to the first voltage signal or the second voltage signal output by the encoder circuit; and a main control circuit configured to determine a rotation direction of the rotation operation according to the interrupt signal and the voltage state transition data.

A key control device and a key control method are disclosed. The key control device includes: an encoder circuit including a first output terminal and a second output terminal and configured to output a first voltage signal and a second voltage signal through the first output terminal and the second output terminal respectively, under triggering of a rotational operation; a first interface extension circuit configured to receive the first voltage signal and the second voltage signal, and generate an interrupt signal and voltage state transition data in response to the first voltage signal or the second voltage signal output by the encoder circuit; and a main control circuit configured to determine a rotation direction of the rotation operation according to the interrupt signal and the voltage state transition data.

Systems and methods for authenticating identification information are disclosed. For example, an Automated Teller Machine (ATM) may comprise a user interface. The user interface may comprise a card reader. The card reader may be configured for card rotation about an axis of a bank card. The user interface may be configured to receive card rotation input from a user. The ATM may comprise at least one memory storing instructions. The ATM may comprise at least one processor configured to execute the instructions to perform operations. The operations may comprise receiving identification information from the user. The operations may comprise receiving the card rotation input. The operations may comprise extracting a card rotation sequence from the card rotation input. When the card rotation sequence is within a predetermined threshold from a stored card rotation sequence corresponding to the identification information, the operations may comprise authenticating the user for an ATM operation.

Systems and methods for authenticating identification information are disclosed. For example, an Automated Teller Machine (ATM) may comprise a user interface. The user interface may comprise a card reader. The card reader may be configured for card rotation about an axis of a bank card. The user interface may be configured to receive card rotation input from a user. The ATM may comprise at least one memory storing instructions. The ATM may comprise at least one processor configured to execute the instructions to perform operations. The operations may comprise receiving identification information from the user. The operations may comprise receiving the card rotation input. The operations may comprise extracting a card rotation sequence from the card rotation input. When the card rotation sequence is within a predetermined threshold from a stored card rotation sequence corresponding to the identification information, the operations may comprise authenticating the user for an ATM operation.

At a time that a position detecting device is initiated, an arithmetic processing unit calculates the absolute position of a rotating shaft at the time of initiation, on the basis of first to third analog signals corresponding to first to third angles of rotation, which are detected respectively by first to third rotational angle detectors. During rotation of the rotating shaft, a current position counter detects a current absolute position of the rotating shaft by counting a number of pulses of forward rotation pulses or reverse rotation pulses, corresponding to the first angle of rotation detected by the first rotational angle detector, taking as a standard a total number of pulses corresponding to the absolute position of the rotating shaft at the time of initiation.

At a time that a position detecting device is initiated, an arithmetic processing unit calculates the absolute position of a rotating shaft at the time of initiation, on the basis of first to third analog signals corresponding to first to third angles of rotation, which are detected respectively by first to third rotational angle detectors. During rotation of the rotating shaft, a current position counter detects a current absolute position of the rotating shaft by counting a number of pulses of forward rotation pulses or reverse rotation pulses, corresponding to the first angle of rotation detected by the first rotational angle detector, taking as a standard a total number of pulses corresponding to the absolute position of the rotating shaft at the time of initiation.

An apparatus and a method provide an output signal indicative of a speed of rotation and/or a direction of movement of a ferromagnetic object. The sensor includes at least one magnetic field sensing element configured to generate a magnetic field signal in response to a magnetic field associated with an object. The sensor includes a detector configured to generate a detector signal having edges occurring in response to a comparison of the magnetic field signal and the threshold signal. The sensor includes an output circuit configured to generate an output signal having a first format when a characteristic of the magnetic field signal is within a first range and having a second format different than the first format when the characteristic of the magnetic field signal is within a second range, different than the first range.

A movement sensor comprises a multi-pole ring magnet, a semiconductor substrate, a first magnetic sensor formed on the semiconductor substrate, and a second magnetic sensor formed on the semiconductor substrate. The first magnetic sensor is configured to produce a first output signal in response to movement of the multi-pole ring magnet, and a centroid of the first and second magnetic sensors are separate and radially aligned on the semiconductor substrate relative to the multi-pole ring magnet. The second magnetic sensor is arranged at a predetermined angle with respect to the first magnetic sensor and is configured to produce a second output signal in response to the movement of the multi-pole ring magnet. The predetermined angle is between 0° and 90° exclusive and is configured to produce a difference in phase between the first and second output signals in response to the movement of the multi-pole ring magnet.

A detection device, a conveyor and an associated method are provided. The detection device includes: an attaching member for fixating the detection device to the conveyor; an axle coupled to the attaching member; a roller rotatably disposed around the axle and abutting against a pedal of the conveyor and being actuated by the pedal in response to a movement of the pedal along a first direction; and a sensor for detecting an operating state of the conveyor by detecting the operating state of the roller.