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:Terms

Last Updated:Aug 11, 2023

This topic describes the terms that are used in LinkVisual.

Term

Description

instance

You can manage resources such as products, devices, and rules on IoT Platform instances. The following two types of instances are supported:

  • Public instance (default): After the IoT Platform service is activated, a public instance is provided by default. Public instances are deployed in Alibaba Cloud classic networks.

  • Enterprise Edition instance: You must purchase Enterprise Edition instances. Enterprise Edition instances are deployed in Alibaba Cloud virtual private clouds (VPCs). You can use an Alibaba Cloud account to purchase multiple Enterprise Edition instances and use the dedicated resources of the instances.

You can use Enterprise Edition instances to connect IP cameras and network video recorders to IoT Platform and process audio and video data.

edge machine of the V series

Link IoT Edge provides edge machines of the V series (LE-V) that have high-performance computing modules to support algorithms of human shape recognition, human trajectory tracking, detection of area intrusion or occupation, and reverse image search.

IP camera

An Internet Protocol (IP) camera is a type of network-connected digital video camera.

NVR

A network video recorder (NVR) is a network-connected device that records videos.

PTZ control

Pan-tilt-zoom (PTZ) control refers to remote control operations that adjust the field of view of a camera. You can pan the camera left or right, tilt the camera up or down, and zoom in or out to capture views from different angles and perspectives.

device certificate

A device certificate consists of a ProductKey, a DeviceName, and a DeviceSecret.

  • A ProductKey is the unique identifier of a product in IoT Platform.

  • A DeviceName is generated by IoT Platform for each device during device registration. You can also upload custom DeviceNames. Each DeviceName must be unique in a product.

  • A DeviceSecret is the private key that is issued by IoT Platform for each device. A DeviceSecret is used together with a DeviceName.

Important

The device certificate is required for device authentication and communication. Keep the device certificate properly for future use.

ProductSecret

A ProductSecret is the private key that is issued by IoT Platform for each product. In most cases, a ProductSecret is used together with a ProductKey for unique-certificate-per-product authentication.

Important

ProductSecrets are required in device authentication. Keep the ProductSecret properly for future use.

TSL model

IoT Platform uses Thing Specification Language (TSL) to describe device features. A TSL model defines the device properties, services, and events. TSL models use the JSON format. You can organize data based on a TSL model and submit the data to IoT Platform.

property

A property is a TSL feature that describes the status of a device, such as the temperature information that is collected by an environmental monitoring device. Properties support the GET and SET request methods. Applications can send requests to retrieve and set properties.

service

A service is a TSL feature that describes the capabilities or methods of a device. The capabilities or methods can be used by external requesters. You can specify the input and output parameters of a service. Compared with properties, services can be invoked by using a command to implement complex business logic. For example, you can invoke a service to perform a specific task.

event

An event is a TSL feature that describes the runtime events of a device. An event contains a notification that requires action or attention. An event may contain multiple output parameters. For example, an event can be a notification that a task is complete, a device fault occurred, or a temperature alert is generated. You can subscribe to or push events.

intelligent alerting

LinkVisual defines the alert events for IP cameras based on vision algorithms. The events include motion detection, illegal parking, and others.

time template

A time template defines time segments within a week for IP cameras to record videos. After a recording plan is associated with the time template, you can associate an IP camera with the recording plan. This way, the IP camera automatically records and uploads videos to IoT Platform based on the conditions that are specified in the recording plan.

recording plan

A recording plan defines the conditions that trigger continuous recording or intelligent alerting-specific recording. After you associate an IP camera with the recording plan, the IP camera automatically records and uploads videos to IoT Platform based on the specified conditions.

  • To create a continuous recording plan, specify the recording plan name and the associated time template.

  • To create an intelligent alerting-specific recording plan, specify the recording plan name, video duration, pre-recorded video duration, alert event type, and associated time template.

For information about terms that are used in IoT Platform, see Terms of IoT Platform. For information about terms that are used in Link IoT Edge, see Terms of Link IoT Edge.