Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for fetching and guarding delivered packages using robots. One of the methods includes: determining a characteristic of a package at a first location; determining a risk score for the package at the first location; determining, using the risk score and the characteristic of the package, to perform an action for the package; in response to determining to perform the action for the package, assigning a robot to perform the action; and deploying the robot to perform the action.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for sensor timing correlation. One of the methods includes obtaining (i) first sensor data from a first sensor and (ii) second sensor data from a second sensor; detecting a representation of an object in both the first sensor data and the second sensor data; determining a predicted physical distance between a first representation of the object in the first sensor data and a second representation of the object in the second sensor data; determining a timing offset between the different sensors using the predicted physical distance between the first representation of the object and the second representation of the object; and adjusting, using the timing offset, subsequent data from the first sensor or the second sensor.

Abstract: A monitoring system that is configured to monitor a property is disclosed. The monitoring system includes a sensor that is configured to generate sensor data that indicates an attribute of the property; a floor sensor that is configured to generate floor sensor data that indicates an amount of pressure applied to a portion of a floor of the property; and a monitor control unit. The monitor control unit is configured to receive, from the sensor, the sensor data; receive, from the floor sensor, the floor sensor data; analyze the sensor data and the floor sensor data; and based on analyzing the sensor data and the floor sensor data, perform a monitoring system action.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, are described for implementing a smart security fastener. The smart security fastener includes a body configured to be installed at a property; and a head that is supported by the body. The head has circuitry that includes: a micro-processor that generates control signals; and a radio device that is coupled to the micro-processor. The radio device is operable to: i) transmit data to a property monitoring system based on the control signals, where the data indicates an installation status of the smart security fastener; and ii) receive a command from the property monitoring system that indicates authorization to uninstall the smart security fastener. The circuitry also includes a power source that powers each of the micro-processor and the radio device.

Abstract: A device for detecting and alleviating flooding and blocked storm sewers includes a manhole cover coupled to a float body. The device also includes a canister having a drain hole and a valve. The device also includes multiple guides that can catch onto part of a sewer. The device is configured such that when water flows into the canister, the manhole cover, float body, and guides rise and the valve is opened.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for object detection. One of the methods includes determining, using first sensor data, a detection result on whether to trigger an event alerting a presence of an object in a target area by executing one or more models; determining, using second sensor data, a ground truth for the event that indicates whether an object is present in the target area; determining a difference value by comparing the detection result and the ground truth; adjusting at least one parameter of the one or more models in response to determining that the difference value does not satisfy the one or more threshold criteria; and determining a new detection result on whether to trigger a second event by executing the one or more models with adjusted parameters using new first sensor data.

Abstract: A power connection for a smart lock device including a strike plate that is mounted to a door frame, the strike plate having one or more spring contacts in a recessed portion of the strike plate, a back portion of the strike plate that is connected to a power source, wherein the one or more spring contacts in the recessed portion of the strike plate are connected to the power source via an electrical wiring, and a smart lock device that is mounted to a door, the smart lock device including a deadbolt that is configured to extend from a side portion of the door, where the one or more spring contacts in the recessed portion of the strike plate are configured to align with one or more conductive segments of the deadbolt.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for drones. In some implementations, a method may include obtaining an image of an electrical device; determining a power source of the electrical device based on the image of the electrical device; determining whether the power source of the electrical device is capable of charging a drone based on the image of the electrical device; and based on determining that the power source of the electrical device is capable of charging the drone based on the image of the electrical device, charging the drone with the power source.

Abstract: Methods, systems, and apparatus for drone landing ground station. A method includes determining that a drone is landing on a ground station, based on determining that the drone is landing on the ground station, determining a magnetic field to generate at a first magnetic component at a first position in the ground station and an opposing magnetic polar at a second magnetic component at a second position in the ground station, and generating the magnetic field at the first magnetic component and the opposing magnetic field at the second magnetic component.

Abstract: Methods and systems for image-based abnormal event detection are disclosed. An example method includes obtaining a sequential set of images captured by a camera; generating a set of observed features for each of the images; generating a set of predicted features based on a portion of the sets of observed features that excludes the set of observed features for a last image in the sequential set of images; determining that a difference between the set of predicted features and the set of observed features for the last image in the sequential set of images satisfies abnormal event criteria; and in response to determining that the difference between the set of predicted features and the set of observed features for the last image in the sequential set of images satisfies abnormal event criteria, classifying the set of sequential images as showing an abnormal event.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for real-motion prediction. One of the methods includes: providing, as an input to a machine learning model, image frames of a scene for which the image frames were captured over a period of time; obtaining, as an output from the machine learning model, a temporally aggregated optical flow signature that includes a two-dimensional (2D) motion vector for a plurality of locations in the image frames of the scene; detecting, using the temporally aggregated optical flow signature, a real-motion event by comparing a magnitude of each 2D motion vector with a threshold; and performing an action for the real-motion event in response to detecting the real-motion event.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for robot navigation. One of the methods includes obtaining one or more images of an area from a robot; detecting two or more lines within the one or more images; identifying at least two of the two or more lines as vanishing lines; determining, using the vanishing lines, a correction maneuver; and controlling the robot to implement the correction maneuver.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining that current data captured at a current location of a drone satisfies localization adjustment criteria; in response to determining that the current data captured at the current location of the drone satisfies the localization adjustment criteria, identifying previously captured image data; determining a previous expected location of the drone based on both an expected change in location of the drone and a first previous location determined from other image data captured before the previously captured image data; determining a location difference between the previous expected location of the drone and a second previous location determined from the previously captured image data; and determining the current location of the drone based on the location difference.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for consolidation of alerts using a similarity criterion. One of the methods includes: receiving, from a sensor at a property for which a first action in a sequence of actions was detected by a second sensor at the property, data that identifies a second action at the property; determining whether the second action satisfies a similarity criterion for an action in the sequence of actions that define an event at the property; and in response to determining that the second action satisfies the similarity criterion for the action in the sequence of actions that define the event at the property, performing an event operation for the event at the property.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for emphasizing a portion of audio data. In some implementations, a method may include determining that a first person is wearing a hearing aid, determining, from images captured by a camera, that a second person is speaking to the first person, determining an audio stream for an environment in which the first person is located, determining whether more than one sound stream is encoded in the audio stream, based on determining that more than one sound stream is encoded in audio data, identifying a portion of captured sounds that corresponds to the second person speaking to the first person, and providing, to the hearing aid, audio data that increases a volume of the portion of captured sounds relative to other portions of the captured sounds.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for a mobile docking station. In some implementations, a method for a mobile docking station includes receiving a service request from a first user; determining assignment details based on the service request; determining a plurality of devices to send to a location based on the assignment details; deploying the plurality of devices to the location; receiving data from a first device of the plurality of devices; based on the data, scheduling a pickup of the first device; and deploying a second device for the pickup of the first device.

Abstract: Systems and techniques are described for using thermal imaging to configure and/or augment temperature regulation operations within a property. In some implementations, a computing device obtains a thermal image of a region of a property. The thermal image identifies at least a surface within the region. A surface temperature of the surface is determined. An ambient temperature for the region is determined based at least on the surface temperature. The one or more temperature controls for the region are adjusted based at least on the ambient temperature.

Abstract: Methods, systems, and apparatus for ground plane filtering of video events are disclosed. A method includes obtaining a first set of images of a scene from a camera; determining a ground plane from the first set of images of the scene; obtaining a second set of images of the scene after the first set of images of the scene is obtained; determining that movement shown by a group of pixels in the second set of images of the scene satisfies motion criteria; determining that the ground plane corresponds with at least a portion of the group of pixels; and in response to determining that movement shown by the group of pixels in the second set of images of the scene satisfies motion criteria, and that the ground plane corresponds with at least a portion of the group of pixels, classifying the group of pixels as showing ground plane based motion.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for generating rules for a monitoring system. In some implementations, a method includes presenting a virtual model of a monitoring system of a property; obtaining action data from a computer generated avatar in the virtual model; generating a security rule for the monitoring system using the action data from the computer generated avatar in the virtual model; and providing, to the monitoring system, the security rule to cause the monitoring system to generate, using the security rule and sensor data from the property received by the monitoring system, a security alert.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for generating a placement of a camera. In some implementations, maintaining monitoring information of a property; generating a virtual model of a property; determining an initial placement location for a virtual camera in the virtual model; obtaining image data generated in the virtual model from the virtual camera placed at the initial placement location; analyzing the image data; determining, using the analysis of the image data, whether to identify an updated placement location; and providing the placement location for a physical camera at the property to a device using a result of the determination whether to identify the updated placement location.