A low cost position sensor and a mobility device using the same are provided. The low cost position sensor comprises a rollable object, a container and a control circuit. The rollable object comprises a specific material. The container has a non-planar inner bottom portion. At least one sensor for detecting coordinates is disposed inside the container. The rollable object is disposed in the container. The sensor can detect the specific material. The control circuit is coupled to the sensor. The sensor detects the specific material to determine a coordinate position of the rollable object, and sends the coordinate position of the rollable object back to the control circuit. The control circuit determines a tilt angle of the container according to the coordinate position of the rollable object.

A level including level vial(s) having enhanced visibility are provided. The level may include a level vial including a material that is attracted to the interface or border of a globule within the level vial which improves visibility of the interface. The level may include a solid level indicator having easy to see end surfaces that are generally vertically oriented when in the level position. The end surfaces of the solid level indicator may allow the user to more easily compare the position of the solid level indicator to indicating lines formed on the level vial. The level may include a level vial including a first liquid and an immiscible second liquid forming a globule with the first material. The globule formed from the second material may improve visibility compared to a typical air bubble.

A level including level vial(s) having enhanced visibility are provided. The level may include a level vial including a material that is attracted to the interface or border of a globule within the level vial which improves visibility of the interface. The level may include a solid level indicator having easy to see end surfaces that are generally vertically oriented when in the level position. The end surfaces of the solid level indicator may allow the user to more easily compare the position of the solid level indicator to indicating lines formed on the level vial. The level may include a level vial including a first liquid and an immiscible second liquid forming a globule with the first material. The globule formed from the second material may improve visibility compared to a typical air bubble.

A tilt sensor for signaling when the tilt sensor is not vertical. The tilt sensor includes a metallic ball that is free to move and capable of resting at a low point when the tilt sensor is vertical. A proximity sensor directed at the low point communicates when the metallic ball has deviated from its position of repose, indicating that the sensor is no longer vertical.

There is disclosed a shoe mounted gradiometer tool. The tool includes an enclosed housing having a convex interior base and a transparent top. A ball is disposed within the enclosed housing. The ball is sized and shaped to roll on the convex interior base. There is a mounting piece connected to the enclosed housing for securing the enclosed housing to an exterior surface of a shoe. The position of the shoe mounted gradiometer tool may be adjusted by placing a fastener through a fastener-receiving hole on the mounting piece. The fastener is loosely connected to a shoe. The orientation of the housing is adjusted by pivoting the housing around the fastener-receiving hole so that a marked level position of the tool corresponds to the lowest position of the convex interior base. The mounting piece is then mounted fixedly to the shoe.

A flexible electronic device includes a flexible electronic circuit and a flexible microfluidic sensor homogeneously integrated into the flexible circuit. The flexible sensor includes a flexible microfluidic structure, a first material, a second material, and an electrode arrangement. At least one of the first and second materials is a fluid. The structure defines at least one microfluidic chamber. The first and second materials are disposed in the chamber. The second material has a physical property and an electrical property different from the first material. The electrode arrangement includes at least one pair of electrodes spaced apart from each other with at least a portion of the at least one chamber located functionally directly therebetween such that at least one electronic property measured across the pair is based on a relationship between the second material and the electrode pair. The relationship is based on a physical condition of the microfluidic structure.

A vehicle sensor device comprising: a weight body housing installed in a body so as to be rotatable around a shaft coupled to the body, a weight body being installed in the weight body housing, a ball assembly for sensing a change in inclination of a vehicle, a sensor housing in which the ball assembly is movably installed, and a sensor lever installed in the sensor housing and rotated by the movement of the ball assembly. The sensor lever is configured to linearly reciprocate, by rotation, a pilot lever provided in a locking device. The sensor lever is installed in the sensor housing to which the ball assembly is coupled. The sensor lever is rotated around a hinge shaft by the movement of the ball assembly according to a change in inclination of the vehicle to linearly reciprocate the pilot lever connected to the sensor lever.

Present disclosure discloses a device (100) for indicating orientation of an object (P). The device (100) includes a housing (14) positioned on the object (P). The housing includes a first and a second light source (LS1, LS2) positioned opposite to a first screen (S1) and a second screen (S2). Further, an enclosure (8) disposed within the housing (14) and a rod structure (101) rotatably disposed within the enclosure (8). The rod structure (101) includes a plurality of rods fixed at one end. A rod (1) in the rod structure is heavier than the other rods and points towards gravity. Furthermore, a roller (7) is positioned between the enclosure (8) and the plurality of rods. The roller (7) in the rod (1) is made of an opaque material to cast a shadow on the first and the second screen. The device enables indication of orientation of the object with simple construction.