Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a set of electrical switches and a controller configured to determine a calibration value of an operating parameter of the HVAC system based on a plurality of configurations of the set of electrical switches during operation of the HVAC system in a calibration mode, receive a measured value of the operating parameter from a sensor of the HVAC system during the operation of the HVAC system in the calibration mode, and determine a parameter value adjustment for the measured value based on a comparison of the measured value and the calibration value.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a refrigerant circuit configured to circulate a refrigerant to condition an air flow within an air flow conduit and a reheat system fluidly separate from the refrigerant circuit, wherein the reheat system is configured to utilize a waste fluid from a waste heat source to reheat the air flow conditioned by the refrigerant circuit.

Abstract: A method for determining a topology of an Ethernet ring having a plurality of devices includes disabling a first port of a first device of the plurality of devices, detecting a terminated link at a first port of a second device of the plurality of devices, sending a message to a ring topology generator indicating that the first port of the second device is connected to a previous device relative to the second device, and generating the topology of the Ethernet ring based on (1) the message indicating that the first port of the second device is connected to the previous device relative to the second device and (2) an indication that the first device is the previous device relative to the second device.

Abstract: A system and method for controlling surveillance cameras is enclosed. In the system, a surveillance camera system includes surveillance cameras configured as VoIP server endpoints. The surveillance cameras receive messages from client devices such as mobile user devices and computer workstations functioning as VoIP client endpoints. The client devices establish a voice communications channel with the surveillance cameras for receiving and controlling one or more streams of image data sent by the surveillance camera over the voice communications channel to the client device. In a preferred embodiment, the voice communications channel includes a control session based on Session Information Protocol (SIP) and a data channel that is based on Real time transfer protocol (RTP) The data channel preferably operates in half duplex mode, which limits the potential for collisions on the data channel when the surveillance cameras are transmitting their image data to the client devices.

Abstract: Systems and methods to integrate equipment models are described herein. Integration of equipment models can occur responsive to detection of new physical devices.

Abstract: 1. A system includes a unit of building equipment serving a building and including a heating, ventilation, or cooling component and onboard circuitry configured to execute a configuration routine stored on the circuitry which automatically configures parameters of the building equipment based on the signals received from sensors and devices at the building. The system also includes a cloud system communicably connectable to the onboard circuitry and configured to influence the configuration routine.

Abstract: An energy plant includes a plurality of subplants, a high level optimizer, a low level optimizer, and a controller. The plurality of subplants include a cogeneration subplant configured to generate steam and electricity and a chiller subplant electrically coupled to the cogeneration subplant and configured to consume the electricity generated by the cogeneration subplant. The high level optimizer is configured to determine recommended subplant loads for each of the plurality of subplants. The recommended subplant loads include a rate of steam production and a rate of electricity production of the cogeneration subplant and a rate of electricity consumption of the chiller subplant. The low level optimizer is configured to determine recommended equipment setpoints for equipment of the plurality of subplants based on the recommended subplant loads. The controller is configured to operate the equipment of the plurality of subplants based on the recommended equipment setpoints.

Abstract: One implementation of the present disclosure is a system including one or more memory devices having instructions stored thereon, that, when executed by one or more processors, cause the one or more processors to receive a selection including a context and a twin function and generate an operation to monitor a graph based on the context, the operation identifying whether one or more new events are added to the graph, the one or more new events affecting a processing result. The instructions cause the one or more processors to cause the twin function to execute responsive to identifying the one or more new events added to the graph that affect the processing result, execute the twin function based on the one or more new events and the context to generate the processing result.

Abstract: Example implementations include a smoke detector comprising a smoke chamber; an LED that generates light in the smoke chamber; a photodetector configured to detect whether a threshold amount of light is scattered by smoke particles in the smoke chamber; and one or more self-testing components configured to re-direct the light from the LED toward the photodetector for self-testing the LED and the photodetector. Some further implementations include one or more masking self-test components configured external to the smoke chamber to direct light from outside the smoke chamber into the smoke chamber and toward the photodetector for determining whether the smoke detector has been masked. Some further example implementations include a method comprising controlling one or more self-testing components of a smoke detector to re-direct at least a portion of light from an LED toward a photodetector; and determining whether the photodetector causes an alarm trigger in response to the controlling.

Abstract: A method of software gateways of a building, the method including generating a ledger file including a description of a first software gateway, wherein the ledger file further includes first point assignments for the first software gateway and second point assignments for a second software gateway, wherein a first computing system implements the first software gateway and a second computing system implements the second software gateway and communicating the ledger file to the first software gateway and the second software gateway. The method further including managing, by the first software gateway, first points of the first point assignments based on the ledger file and managing, by the second software gateway, second points of the second point assignments based on the ledger file and determining, by the second software gateway, a status of the first software gateway based on the description of the first software gateway of the ledger file.

Abstract: A load balancing method for two compressors. The two compressors are used in a refrigeration system and are driven coaxially by the same driving device. The method comprises the steps of obtaining parameters, determining balance, and controlling start/stop states. The parameters in the step of obtaining parameters are parameters related to the two compressors. The step of determining balance comprises determining, on the basis of the obtained parameters related to the two compressors, whether load is balanced between the two compressors. The step of controlling start/top states comprises controlling the start/stop states of the two compressors according to whether the load is balanced.

Abstract: A building system that operates to receive building data from one or more building systems of the building, wherein at least a portion of the building data is associated with control of the one or more environmental conditions of the building and generate, based on the building data, a plurality of building health scores of the building, wherein an overall building health score is based on a combination of the plurality of building health scores. The building system operates to receive user feedback regarding the plurality of building health scores via one or more user devices, determine whether the user feedback confirms or denies an accuracy of the plurality of health scores, and generate a user interface and cause the user interface to display an indication of whether the user feedback confirms the accuracy of the plurality of building health scores.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a conditioning system configured to condition a return air flow directed through the HVAC system and a control system configured to determine a difference value between an operating parameter value of the return air flow and a sensed operating parameter value of a space serviced by the HVAC system, retrieve a stored target operating parameter value of the space, and operate the HVAC system based on the difference value, the stored target operating parameter value, or both.

Abstract: A system includes a compressor housing having an intake portion and a discharge portion and a rotor disposed in the compressor housing and configured to compress a fluid flowing from the intake portion toward the discharge portion. The rotor includes a body portion and an internal passageway formed within the body portion extending along an axial length of the rotor. The internal passageway is configured to direct a lubricant between the intake portion and the discharge portion of the compressor housing.

Abstract: A system for controlling access to building equipment, the system having one or more memory devices having instructions stored thereon that, when executed cause one or more processors to perform operations. The operations include receiving an access request from a user device to access a device of building equipment, the access request indicating the device to which access is requested and an identity of an entity requesting access. The operations also include selecting an access level of the entity from a plurality of access levels stored in an access profile database based on the access request. The operations further include generating an encrypted access code indicating the access level of the entity, and transmitting the encrypted access code to the user device, the encrypted access code granting access to the device when the encrypted access code is entered via a device interface of the device.

Abstract: Systems and methods are disclosed relating to building management systems with language model-based data structure generation. For example, a method can include receiving a query to select, from a plurality of data sources of a building management system, a selected one or more data sources according to a characteristic indicated by the query in at least one of a natural language representation or a semantic representation. The method can further include applying the query as input to a machine learning model to cause the machine learning model to generate an output indicating the selected one or more data sources, the machine learning model configured using training data comprising sample data and metadata from the plurality of data sources. The method can further include presenting, using at least one of a display device or an audio output device, the output.

Abstract: A method for implementing rules in a complex event processing (CEP) engine is shown. The method includes displaying an interactive diagramming tool to a user on a user interface. The method includes receiving, via the interactive diagramming tool, one or more commands to create a rule. The method includes generating the rule for a complex event processing (CEP) engine based on the received commands. The method includes performing a validation process of the rule and, in response to completion of the validation process, integrating the rule into the CEP engine.

Abstract: A method executable by a building management system includes generating a graphical user interface that includes a bar graph comprising a plurality of bars representing resource consumption values for a plurality of time periods and a line overlaid on the bar graph and representing a baseline or target resource consumption. The method also includes comparing the resource consumption values to the baseline or target resource consumption, adding a first icon aligned with a first bar of the plurality of bars in response to determining that a first resource consumption value represented by the first bar is within a threshold of the baseline or target resource consumption and less than the baseline or target resource consumption, and adding a second icon aligned with the first bar in response to determining that the first resource consumption value exceeds the baseline. The second icon is different than the first icon.

Abstract: An access control system can include a camera that detects an image regarding a subject, a database maintaining information, a facial recognizer that receives the image and identifies a facial feature of the subject based on the received image and the facial information maintained by the database, and a processor to alert security or another user when an authorized user accessing an area of a building is under duress, when an unauthorized user is accessing an area of a building by tailgating after an authorized user, when an authorized user has not provided two-factor authentication, or when an authorized user is in a particular area of the building.

Abstract: A predictive controller for building equipment associated with a building includes one or more processing circuits configured to control electric energy used by the building equipment. The building equipment includes an electric energy using component. The one or more processing circuits are configured to utilize a predictive cost function to determine a first amount of the electric energy supplied from an energy grid source and a second amount of the electric energy supplied from a second energy source to the electric energy using component.