Inspection devices and methods for inspecting an adhesive pattern on a substrate are disclosed. The inspection device includes at least one sensor having a heat sensor head for detecting a pattern of the adhesive bead, and a controller. Reference data representing a desired adhesive pattern is initially provided to a controller. A predetermined tolerance range for the desired adhesive pattern is also provided to the controller. An adhesive bead is discharged onto a substrate from a nozzle. A pattern of the discharged adhesive bead is then detected by the sensor when the substrate moves. Signals representing the detected pattern are received from the sensor at the controller. Finally, the signals representing the detected adhesive pattern are compared to the tolerance range of the desired adhesive pattern.

An optical sensor system including a semiconductor substrate; a self-mixing interferometry (SMI) sensor formed on the semiconductor substrate and including a semiconductor laser having a resonant cavity; and an array of photodetectors formed on the semiconductor substrate. The SMI sensor is configured to generate an SMI signal responsive to a retro-reflection of electromagnetic radiation emitted by the semiconductor laser and received into the resonant cavity. The array of photodetectors is configured to generate a set of angular-resolved scatter signals responsive to a scatter of the electromagnetic radiation emitted by the semiconductor laser.

A compound bow includes a riser, an upper limb, and a lower limb, the upper limb and lower limbs coupled to the riser. The compound bow may include a draw sensor. The compound bow includes a performance module coupled to the riser, the performance module operatively coupled to the draw sensor. A compound bow may include an arrow chronometer assembly. A method may include determining draw weight or length based on measurements of the draw sensor. A method may include determining arrow speed based on measurements of the arrow chronometer assembly.

Disclosed herein is a velocity measuring device to be used in a moving frame to determine the velocity of the moving frame. At least one beam of light is emitted from a site in the moving frame and travels to a mirror disposed in the moving frame and back to the site at which the emission occurred, after which the beam is detected by a detector. By measuring the round trip time of the light beam from emission to detection, a factor gamma can be determined from which the velocity of the moving frame can be computed.

An optical sensor system including a semiconductor substrate; a self-mixing interferometry (SMI) sensor formed on the semiconductor substrate and including a semiconductor laser having a resonant cavity; and an array of photodetectors formed on the semiconductor substrate. The SMI sensor is configured to generate an SMI signal responsive to a retro-reflection of electromagnetic radiation emitted by the semiconductor laser and received into the resonant cavity. The array of photodetectors is configured to generate a set of angular-resolved scatter signals responsive to a scatter of the electromagnetic radiation emitted by the semiconductor laser.

The present disclosure relates to a ballistic projectile velocity measurement apparatus that senses and records the times in which a projectile travels through two vertical planes represented by two sensor gates which are spaced horizontally from each other. The sensor gates each utilize an LED laser that emits a laser light through a diffuser along a diffusion angle into a plurality of laser light sensors to create a wall of laser light, and the sensor gates register a break in the wall of light when a ballistic projectile obstructs the light received by at least one laser light sensor. The ballistics apparatus then determines the velocity of the projectile based on the distance between the two gates and difference in time between the two plane-breaking events.

A compound bow includes a riser, an upper limb, and a lower limb, the upper limb and lower limbs coupled to the riser. The compound bow may include a draw sensor. The compound bow includes a performance module coupled to the riser, the performance module operatively coupled to the draw sensor. A compound bow may include an arrow chronometer assembly. A method may include determining draw weight or length based on measurements of the draw sensor. A method may include determining arrow speed based on measurements of the arrow chronometer assembly.

A scatterer measurement method includes: radiating a first irradiating light that passes through a first space in which a scatterer is present; receiving a first scattered light produced by the first irradiating light being scattered by the scatterer; after the scatterer has moved from the first space to a second space at least partially different from the first space, radiating a second irradiating light that passes through the second space; receiving a second scattered light produced by the second irradiating light being scattered by the scatterer; and calculating a velocity of the scatterer based on a difference between a first point in time at which the first scattered light was received and a second point in time at which the second scattered light was received and a distance that the scatterer moved during a period from the first point in time to the second point in time.

A scatterer measurement method includes: radiating a first irradiating light that passes through a first space in which a scatterer is present; receiving a first scattered light produced by the first irradiating light being scattered by the scatterer; after the scatterer has moved from the first space to a second space at least partially different from the first space, radiating a second irradiating light that passes through the second space; receiving a second scattered light produced by the second irradiating light being scattered by the scatterer; and calculating a velocity of the scatterer based on a difference between a first point in time at which the first scattered light was received and a second point in time at which the second scattered light was received and a distance that the scatterer moved during a period from the first point in time to the second point in time.

A system and method is provided for determining a speed of a belt moving along a transport axis in conveyor oven tunnel. The method includes providing a sensor module, capturing signals, processing the signals, and outputting least one speed estimate. The sensor module is disposed upon the moving belt. The sensor module includes a first optical sensor and a second optical sensor. The optical sensors are spaced apart by a distance D along the transport axis. Capturing signals includes capturing first and second signals from the first and second sensors respectively as they are transported along the belt and within the oven tunnel. Processing the signals includes determining a delay ΔT between the signals. The speed estimate is based upon D divided by ΔT.