초록 ▼

A system, apparatus, and method for determining the distance between two objects using an indirect propagation delay measurement is disclosed. A frequency hopping scheme (such as the Bluetooth™ technology) is used to measure the relative phase offset of the received signal between the various

A system, apparatus, and method for determining the distance between two objects using an indirect propagation delay measurement is disclosed. A frequency hopping scheme (such as the Bluetooth™ technology) is used to measure the relative phase offset of the received signal between the various frequencies. For a given distance between the objects, the phase offset vs. frequency curve is a straight line with the slope dependent upon the measured distance. After the phase of the received signals is detected, the data is plotted on a curve and the slope is calculated. A wireless slave device remains phase locked with another device in a half-duplex communication mode by employing a low-drift phase locked loop employing a voltage controlled crystal oscillator. The phase locked loop further employs a mechanism that provides immunity from transitory phase slip at a time when the loop is opened.

대표청구항 ▼

A system, apparatus, and method for determining the distance between two objects using an indirect propagation delay measurement is disclosed. A frequency hopping scheme (such as the Bluetooth™ technology) is used to measure the relative phase offset of the received signal between the various

A system, apparatus, and method for determining the distance between two objects using an indirect propagation delay measurement is disclosed. A frequency hopping scheme (such as the Bluetooth™ technology) is used to measure the relative phase offset of the received signal between the various frequencies. For a given distance between the objects, the phase offset vs. frequency curve is a straight line with the slope dependent upon the measured distance. After the phase of the received signals is detected, the data is plotted on a curve and the slope is calculated. A wireless slave device remains phase locked with another device in a half-duplex communication mode by employing a low-drift phase locked loop employing a voltage controlled crystal oscillator. The phase locked loop further employs a mechanism that provides immunity from transitory phase slip at a time when the loop is opened. e surface layer comprising a material for increasing a friction coefficient, and wherein the surface layer has a water contact angle greater than or equal to 90°; anda sheet-shaped pressure unit, having an elasticity and in contact with the fixing unit by pressing against the fixing unit, and cantilevered at a first end over the recess portion in the base;wherein when a recording paper onto which a toner image has been transcribed thereon, passes through a nip portion between the sheet-shaped pressure unit and the fixing unit, by pressing and heating, the toner image is fixed onto the recording paper.7. The image forming device of claim 6, wherein the surface layer is formed by PTFE filled with a glass fiber.8. The image forming device of claim 6, wherein the surface layer is formed by PTFE with a graphite.9. The image forming device of claim 6, wherein the surface layer is formed by PTFE with a bronze.10. The image forming device of claim 6, wherein the base includes a step-shape installation fitment into which a second end of the sheet-shaped pressure unit is secured.