Embodiments of the present invention provide a display substrate, a display device, a pressure detection system and a detection method thereof, which relate to the field of display technologies and is able to integrate the ambient pressure testing function in the display substrate for the convenience of being carried by people when going out, wherein the display substrate comprises a base substrate and a pressure sensing structure located on the base substrate configured to test the ambient pressure. The pressure sensing structure comprises a first pressure sensitive electrode and a second pressure sensitive electrode arranged opposite to each other, and a plurality of insulating pillars arranged at intervals between the first pressure sensitive electrode and the second pressure sensitive electrode, wherein the first pressure sensitive electrode is in contact with the base substrate.

An optical reading device for a pointer instrument which has a pointer and a scale face or dial with different degrees of reflectance in each case, includes an illumination device for illuminating the scale face or dial and a plurality of light sensor elements which are arranged in a circular arc about the rotational axis of the pointer in order to detect the light of the illumination device reflected back by the scale face or dial, wherein the illumination device is configured to uniformly illuminate the scale face or dial and each light sensor element is configured with an isosceles triangle outline, where each light sensor element is offset with respect to one another by half of the base width in the circumferential direction of the circular arc.

Pressurized air apparatuses and associated methods are described. According to one aspect, a pressurized air apparatus includes an air input configured to receive pressurized air, a pressure sensor configured to receive the pressurized air from the air input, measure a plurality of different pressures of the pressurized air at a plurality of moments in time, and generate a plurality of signals that are indicative of the different pressures of the pressurized air, processing circuitry configured to receive the signals from the pressure sensor, and process the signals to select one of the signals and disregard others of the signals, and a user interface configured to communicate a value indicative of the pressure of the pressurized air that corresponds to the selected one of the signals to an operator of the pressurized air apparatus.

A pressure measuring device/system that is capable of measuring the pressures of multiple systems in an automobile, including fuel pressure, power steering, engine oil pressure, transmission oil pressure, compression, diesel compression, high pressure oil systems, and diesel fuel pressure, and is capable of displaying and/or recording the measured pressure values. An onboard digital display receives a series of signals from a transducer and displays the series of signals as at least one of a digital needle gauge and a live graph display, and selectively displays the series of signals in a chart with two axes, one for signal and one for time.

Technologies for reducing vehicle door collisions include an in-vehicle compute device configured to determine a proximity between a door of a vehicle and a structure while the door is being opened and activate a door collision avoidance system of the vehicle to slow or restrict the opening of the door in response to a determination that the proximity of the door to the structure is within a proximity threshold. The door collision avoidance system may include one or more electro-magnets, one or more actuators, and/or one or more electro-active polymer devices. The in-vehicle compute device may also control the operation of the door based on a context of the vehicle.

A portable vacuum pressure graphing gauge device enabling users of vacuum systems the ability to see trends of vacuum systems through real time plotting of a pressure vs. time curve on a hand held instrument, enabling them to understand what is going on in their system, or the like. A device may include several graphical modes designed to even more easily interpret vacuum data, and packaging that is rugged and versatile including a magnet, kickstand, wireless connectivity, visual and audible set points, automatic sensor fault detection, and several vacuum pressure measurement units to choose from, or the like.

A water-pressure alarm device can include an inlet that receives water. It can also include a tube in fluid communication with the inlet that reacts based on the pressure of the water within the tube, a link mechanically coupled to the tube, and a movement mechanically coupled to the link. A conductive needle can be mechanically coupled to the movement, such that a reaction by the tube causes the link, movement, and needle to move accordingly. A first electrode is associated with the needle and a second electrode is mounted in a location that acts as a stop for the needle. The first and second electrodes are connected to an alarm that operates when the needle contacts the second electrode. The location of the second electrode can be chosen to correspond to a particular pressure level that would warrant an alarm, such as 100 psi.

A sport-boot pressure monitoring system and method of use. The system includes a left boot sensor having a left flexible fluid-containing bladder shaped to fit between a user's left leg and an interior surface of a left boot worn by the user and a left pressure sense element in pressure-sensing communication with the left flexible fluid-containing bladder, a right boot sensor that is similar to the left one, and a controller to provide a pressure alert if pressure between one of the user's legs and the interior surface of the boot worn on that leg violates a predetermined pressure threshold and to provide a proximity alert if a distance between the left and right boots violates a predetermined proximity threshold.

A system for monitoring tension forces of tendons disposed inside a concrete structure in post-tensioning includes a hydraulic jack coupled to one tendon at one end of the concrete structure to apply the tension force to the tendon by means of the forward movement of a piston; a hydraulic pump connected to the hydraulic jack by means of a hydraulic pressure supply pipe to supply a hydraulic pressure to the hydraulic jack; a digital elongation length measurement sensor disposed on the hydraulic jack to measure the elongation length of the piston; a measurement unit having a data logger adapted to receive and store the elongation length data measured by the digital elongation length measurement sensor and to send the elongation length data to a main server; a digital pressure measurement sensor disposed on the hydraulic pressure supply pipe of the hydraulic pump; and a control module adapted to receive the elongation length data from the data logger or the main server, calculate the tension force, compensate for the coefficient of elasticity of the tendon according to the ratio of the real-time elongation length data to the pressure data, and compensate for the tension force calculated.

A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.