Systems, devices, and methods for a two wire detection circuit powered system comprising: an electronic switch circuit configured to sense a pressure level above or below a predetermined value and indicate an open or closed switch condition, wherein the electronic switch circuit provides a contact resistance voltage of about 20 mV in the closed switch condition; and an energy harvester configured to convert 20 mV when the electronic switch circuit is in the closed switch condition to an operating voltage between 3.6 Volts and 5 Volts for the electronic switch circuit to operate without an additional power source.

A sensor including a layer having viscoelastic properties, the layer comprising a void, the void filled with a fluid; and optionally, a more rigid sensing element embedded within the layer. When a force is applied to a surface of the sensor, the shape of the void changes, causing the electrical resistance of the fluid in the void to change. When included, the more rigid sensing element can bear upon the void to cause the electrical resistance of the fluid in the void to change. A direction and intensity of the force can be determined by measuring the change of the electrical resistance of different voids positioned about the sensing element. The layer can be an elastomer, preferably silicone rubber. The fluid can be a conductive liquid, preferably Eutectic Gallium Indium. The sensing element can be plastic and can have a “Joystick” shape. The voids can take the form of channels or microchannels having a predefined pattern and/or shape.

The present invention relates to a flexible pressure sensor using a multi-material 3D-printed microchannel mold, and a method for manufacturing the same, and more particularly, to a flexible pressure sensor having improved flexibility, sensitivity, and stability for use in a wearable device, and a method for manufacturing the same. Further, the present invention relates to a physical sensor for measuring a force applied from the outside, and more particularly, to a multi-directional physical sensor using a multi-layer microchannel array, which may sense all forces applied from the outside in three-dimensional directions such as a perpendicular direction and a parallel direction by applying the multi-layer microchannel array to a body having a three-dimensionally protruding shape.

A vehicle wheel with monitoring device, and a monitoring device, comprising a housing which is arranged rotatably with a rim part of the vehicle wheel, an electronic circuit which is arranged in the housing and is coupled to a load detection device arranged in the housing and having strain gauges for detecting forces acting on the vehicle wheel. In order to create a monitoring device which is easy to install on different vehicle wheels and which can reliably determine the load forces occurring on the vehicle wheel, the housing has two fastening zones which are spaced apart from one another and which are connected to one another via at least one bending strut connected to both fastening zones as a component of the load detection device, at least one pair of strain gauges being arranged on the bending strut between the fastening zones for detecting the bending of the bending strut caused by load forces.

A vehicle wheel with monitoring device, and a monitoring device, comprising a housing which is arranged rotatably with a rim part of the vehicle wheel, an electronic circuit which is arranged in the housing and is coupled to a load detection device arranged in the housing and having strain gauges for detecting forces acting on the vehicle wheel. In order to create a monitoring device which is easy to install on different vehicle wheels and which can reliably determine the load forces occurring on the vehicle wheel, the housing has two fastening zones which are spaced apart from one another and which are connected to one another via at least one bending strut connected to both fastening zones as a component of the load detection device, at least one pair of strain gauges being arranged on the bending strut between the fastening zones for detecting the bending of the bending strut caused by load forces.

An apparatus for measuring normal and shear stress at a surface. The apparatus includes a substrate; and a plurality of sensing units on the substrate. Each sensing unit includes a mechanical transducer having a receiving surface and a sensing surface; and a plurality of normal force sensors between the sensing surface and the substrate.

An apparatus for measuring normal and shear stress at a surface. The apparatus includes a substrate; and a plurality of sensing units on the substrate. Each sensing unit includes a mechanical transducer having a receiving surface and a sensing surface; and a plurality of normal force sensors between the sensing surface and the substrate.

The invention relates to a method of fabricating a conductive fabric by vapor phase polymerization, a multi-pressure sensor for a fiber type, and a multi-pressure measuring method employing the multi-pressure sensor. The method of fabricating a conductive fabric by vapor phase polymerization provides a conductive fabric having a resistance value which changes depending on pressure applied by a user. The multi-pressure measuring method employing the multi-pressure sensor has high resistance to moisture and repeated loading, is manufactured with lower costs than existing pressure sensors, is capable of measuring both dynamic and static pressures using a principle of a piezo-resistive sensor, has a simple circuit configuration, and is strong against a high-frequency disturbance.

The invention relates to a method of fabricating a conductive fabric by vapor phase polymerization, a multi-pressure sensor for a fiber type, and a multi-pressure measuring method employing the multi-pressure sensor. The method of fabricating a conductive fabric by vapor phase polymerization provides a conductive fabric having a resistance value which changes depending on pressure applied by a user. The multi-pressure measuring method employing the multi-pressure sensor has high resistance to moisture and repeated loading, is manufactured with lower costs than existing pressure sensors, is capable of measuring both dynamic and static pressures using a principle of a piezo-resistive sensor, has a simple circuit configuration, and is strong against a high-frequency disturbance.

Systems, devices, and methods for a two wire detection circuit powered system comprising: an electronic switch circuit configured to sense a pressure level above or below a predetermined value and indicate an open or closed switch condition, wherein the electronic switch circuit provides a contact resistance voltage of about 20 mV in the closed switch condition; and an energy harvester configured to convert 20 mV when the electronic switch circuit is in the closed switch condition to an operating voltage between 3.6 Volts and 5 Volts for the electronic switch circuit to operate without an additional power source.