Abstract: In one embodiment, a system captures a first frame and a second frame for an environment of an autonomous driving vehicle (ADV) from at least a first and a second cameras mounted on the ADV. The system determines at least two points in the first frame having corresponding points in the second frame. The system determines distance and angle measurement information from the first camera to the at least two points and from the second camera to the corresponding points. The system determines actual positioning angles of the first and second cameras with respect to an orientation of the ADV based on the distance and angle measurement information and pixel information in the first and second frames. The actual positioning angles are used to compensate misalignments in positioning angles for the first and second cameras.

Abstract: In one embodiment, a method for controlling PCIe devices on an autonomous driving system (ADS) of an autonomous driving vehicle (ADV) is disclosed. The method includes scanning PCIe ports of the ADS to discover PCIe device(s) mounted on the ADS. Next, a comparison is performed between a list of the discovered PCIe device(s) and an expected list of PCIe devices for the ADS. Next, an offline PCIe device is determined based on the comparison, the offline PCIe device corresponding to a PCIe device that is present in the expected list of PCIe devices but not in the list of the discovered PCIe devices. Then a device reset command is transmitted to a programmable logic device that manages power for PCIe devices of the ADS to reset the offline PCIe device, wherein the programmable logic device generates a reset control signal for the offline PCIe device to reset the PCIe device.

Abstract: A printed circuit board (PCB) includes one or more signal layers in between a first surface and a second surface, the one or more signal layers including a first signal layer. The PCB includes a connector interface disposed on the first surface and a first signal via electrically coupled to the connector interface. The PCB includes first transmission line disposed at the first signal layer electrically coupling a first location to a second location of the first signal layer and a second signal via disposed at the second location. The PCB includes a power-over-cable circuit disposed on the first surface and electrically coupled to the second signal via and a receiver circuit disposed on the first surface adjacent to the power-over-cable circuit. The PCB includes a second transmission line disposed on the first surface layer electrically coupling the power-over-cable circuit to the receiver circuit.

Abstract: In one embodiment, a printed circuit board (PCB) includes a substrate, one or more signal layers including a first signal layer, a first segment of a transmission line disposed at the first signal layer electrically coupling a first location to a second location, and a first signal via disposed at the second location. The PCB circuit includes a second segment of the transmission line disposed at the first signal layer electrically coupling a third location to a fourth location and a second signal via disposed at the third location. The PCB includes a power-over-cable circuit disposed on a first surface of the substrate and electrically coupled to the first and second signal via, where the first and second segments carry a signal of an image sensor and the first segment carries power from the power-over-cable circuit to the image sensor, where the image sensor is used for an autonomous vehicle.

Abstract: In one embodiment, a system captures a first frame and a second frame for an environment of an autonomous driving vehicle (ADV) from at least a first and a second cameras mounted on the ADV. The system determines at least two points in the first frame having corresponding points in the second frame. The system determines distance and angle measurement information from the first camera to the at least two points and from the second camera to the corresponding points. The system determines actual positioning angles of the first and second cameras with respect to an orientation of the ADV based on the distance and angle measurement information and pixel information in the first and second frames. The actual positioning angles are used to compensate misalignments in positioning angles for the first and second cameras.

Abstract: In one embodiment, a printed circuit board (PCB) includes a substrate, one or more signal layers including a first signal layer, a first segment of a transmission line disposed at the first signal layer electrically coupling a first location to a second location, and a first signal via disposed at the second location. The PCB circuit includes a second segment of the transmission line disposed at the first signal layer electrically coupling a third location to a fourth location and a second signal via disposed at the third location. The PCB includes a power-over-cable circuit disposed on a first surface of the substrate and electrically coupled to the first and second signal via, where the first and second segments carry a signal of an image sensor and the first segment carries power from the power-over-cable circuit to the image sensor, where the image sensor is used for an autonomous vehicle.

Abstract: A printed circuit board includes first and second surfaces, first and second layers, and first and second vias. The first via extends from a first layer to the second surface and includes a first portion that is on a conductive path between the first layer and the second layer and a second portion that is not on the conductive path. A length of the first portion of the first via is greater than that of the second portion of the first via. The second via extends from the second surface to the second layer. The second via includes a first portion that is on the conductive path between the first layer and the second layer and a second portion that is not on the conductive path. A length of the first portion of the second via is greater than that of the second portion of the second via.

Abstract: A method and apparatus for identifying a concrete crack includes: obtaining a crack video, and manually annotating a video image frame by using a label; predicting a future frame and label for the annotated frame by using a spatial displacement convolutional block, propagating the future frame and label, to obtain a synthetic sample, and preprocessing the synthetic sample, to form a crack database; modifying input and output ports of data of a deep learning model for video semantic image segmentation and a parameter, to enable the deep learning model to accept video input, and establishing a concrete crack detection model based on the video output; using a convolutional layer in a trained deep learning model as an initial weight of the concrete crack detection model for migration; inputting the crack database into a migrated concrete crack detection model, and training the concrete crack detection model for crack data.

Abstract: A method and apparatus for identifying a concrete crack includes: obtaining a crack video, and manually annotating a video image frame by using a label; predicting a future frame and label for the annotated frame by using a spatial displacement convolutional block, propagating the future frame and label, to obtain a synthetic sample, and preprocessing the synthetic sample, to form a crack database; modifying input and output ports of data of a deep learning model for video semantic image segmentation and a parameter, to enable the deep learning model to accept video input, and establishing a concrete crack detection model based on the video output; using a convolutional layer in a trained deep learning model as an initial weight of the concrete crack detection model for migration; inputting the crack database into a migrated concrete crack detection model, and training the concrete crack detection model for crack data.

Abstract: Generally, this disclosure provides systems and devices for reduction of crosstalk between routed signals. A system may include a first pair of signal lines and a second pair of signal lines and each of the pairs of signal lines include a positive signal line and a negative signal line to transmit a differential signal. The system may also include an alternating current coupling capacitor (AC cap) associated with each of the positive signal lines and each of the negative signal lines. The system may further include a routing crossover of the positive signal line and the negative signal line of the second pair of signal lines, to decrease signal crosstalk between the first and second pairs of signal lines. The routing crossover may include at least one of the AC caps.

Abstract: Generally, this disclosure provides systems and devices for reduction of crosstalk between routed signals. A system may include a first pair of signal lines and a second pair of signal lines and each of the pairs of signal lines include a positive signal line and a negative signal line to transmit a differential signal. The system may also include an alternating current coupling capacitor (AC cap) associated with each of the positive signal lines and each of the negative signal lines. The system may further include a routing crossover of the positive signal line and the negative signal line of the second pair of signal lines, to decrease signal crosstalk between the first and second pairs of signal lines. The routing crossover may include at least one of the AC caps.