CMOS active pixel sensors (APS) allow the flexibility of placing signal processing circuitry on the imaging focal plane. The multiresolution CMOS APS can perform block averaging on-chip to eliminate the off-chip software intensive image processing. This 128 x 128 APS array can be read out at any user-defined resolution by configuring a set of digital shift registers. The full resolution frame r...

One of the major goals o f c u m n t robotics research is to create robotic systems which are able to react to sudden changes in the environment and in the tasks the systems perform, Sensors play a critic;; role in detecting the changes in the environment and in transnii!ting the relevant information to the robotic devices. This information must be evaluated in conjunction with the models of th...

The idea behind Active Structural Acoustic Control (ASAC) is to actively influence the dynamics of a structure to reduce the radiated sound. In ASAC, the difficulty often lies in finding the relation between the structural vibration and the sound pressure in a certain point. The largest reduction in sound pressure level is not always obtained by reducing the vibration levels of one panel, inter...

Various burst origin scenarios require a host object in the burst error box or near a well-located position. For example, a host galaxy should be present in the standard cosmological models. We present a methodology which evaluates whether the observed detections and nondetections of potential host objects in burst error boxes are consistent with the presence of the host, or whether all the det...

Surface texture is one of the important cues for human beings to identify objects. Haptic texture measurement is necessary for object recognition by touch. This paper presents a novel design of a haptic texture sensor by imitating human active texture perception. A thin polyvinylidene fluoride (PVDF) film is used as the sensitive element to fabricate a high-accuracy, high-speed-response haptic ...

This paper describes an indoor Active Sensor Network, focussing on the implementation aspects of the system, including communication and the application framework. To make the system description more tangible we describe the latest in a series of indoor experiments implemented using ASN. The task is to detect and map motion of people (and robots) in an office space using a network of 12 station...

A n active range sensor is summarised. This sensor can direct its field of view in order to fixate on range features for mobile robot navigation. The image position sensor used has a Gaussian noise characteristic with measurable variance, which makes the sensor particularly amenable to stochastic range feature detection. A geometric analysis of the sensor allows a mathematical model of the sens...

We report the design and test results of a beam monitor developed for online monitoring in hadron therapy. The beam monitor uses eight silicon pixel sensors, Topmetal-II−, as the anode array. Topmetal-II− is a charge sensor designed in a CMOS 0.35 μm technology. Each Topmetal-II− sensor has 72 × 72 pixels and the pixel size is 83 × 83 μm. In our design, the beam passes through the beam monitor ...

This work presents the first held at Liverpool University measurements of pixel sensors with n-type readout implant in the p-type bulk before and after irradiation of samples by 24 GeV protons to doses 7 10 and 1.5 10 protons/cm. A comparison is given for two measurement techniques; one based on the FE-I3 readout chip designed for the ATLAS and the other using the Beetle chip developed for the ...

This paper presents two algorithms for removing the cross-talk effect in CMOS sensor based color-imaging systems. The algorithms work on the Bayer raw data and have low computational complexity. Experimental results on Macbeth color chart and real images demonstrated that both algorithms can effectively eliminate the cross-talk effect and produce better quality images with conventional color in...