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KR-102961495-B1 - System for Monitoring Building Conditions by Using Low-Power Wireless Sensor

KR102961495B1KR 102961495 B1KR102961495 B1KR 102961495B1KR-102961495-B1

Abstract

A building condition monitoring system using low-power wireless sensors is disclosed. The present embodiment provides a building condition monitoring system using low-power wireless sensors, wherein the low-power wireless sensors are activated only at a preset period or upon detection of an external event to enable the efficient collection of sensing data even when the low-power wireless sensors are in sleep mode.

Inventors

  • 오재근
  • 박인준

Assignees

  • 주식회사 코아칩스

Dates

Publication Date
20260507
Application Date
20221216

Claims (13)

  1. A low-power wireless sensor that generates sensing data by sensing the operation of each operating facility within the building; An energy harvester connected to the above-mentioned low-power wireless sensor and converting one or more energy sources among vibration, heat, magnetic field, and induced current into power; A supercap connected to the energy harvester and charging the power; An event detection unit connected to the above-mentioned low-power wireless sensor and generating an event detection signal when an event is detected due to a change in state within the building; and It includes the above-mentioned low-power wireless sensor, the above-mentioned supercapacitor, and a control unit connected to the above-mentioned event detection unit, and The above control unit is, When the event detection signal is generated from the event detection unit and only when the charge amount of the supercapacitor is greater than or equal to a first reference value, the low-power wireless sensor is woken up and the sensing data is transmitted to the central server. Characterized by checking whether the charge amount in the supercapacitor is less than the first reference value, and if the charge amount in the supercapacitor is less than the second reference value, operating the low-power wireless sensor and the event detection unit in a forced sleep mode until the charge amount in the supercapacitor becomes greater than or equal to the first reference value. Building condition monitoring system using low-power wireless sensors.
  2. In paragraph 1, The above event detection unit is, A building condition monitoring system using a low-power wireless sensor characterized by generating an event detection signal when there is entry or movement of a person inside the building.
  3. In paragraph 2, The above event detection unit is, A building condition monitoring system using a low-power wireless sensor, characterized by operating in sleep mode after generating the above-mentioned event detection signal, and then waking up and operating by a preset period, a preset number of times, or a command from the control unit.
  4. In paragraph 1, The above control unit is, A building condition monitoring system using a low-power wireless sensor, characterized by operating in sleep mode at a preset period and waking up when a preset timer set period arrives or when the event detection signal is received more than a preset number of times during a preset period.
  5. In paragraph 1, The above control unit is, A building condition monitoring system using low-power wireless sensors, characterized by checking whether the charge amount in the supercapacitor is greater than or equal to a reference value, and if the check result shows that the charge amount in the supercapacitor is greater than or equal to the reference value, supplying power stored in the supercapacitor to the low-power wireless sensors to sequentially wake up and activate a plurality of low-power wireless sensors in a preset order.
  6. In paragraph 5, The above control unit is, A building condition monitoring system using a low-power wireless sensor, characterized by receiving sensing data from the low-power wireless sensor that has been sequentially woken up, and then turning off the power of the low-power wireless sensor to operate in sleep mode.
  7. In paragraph 5, The above control unit is, A building condition monitoring system using a low-power wireless sensor, characterized by generating aggregated data by aggregating the above sensing data, supplying power stored in the above supercapacitor to a communication module to wake up and activate the above communication module, and then transmitting the above aggregated data to the above central server using the above communication module.
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Description

System for Monitoring Building Conditions by Using Low-Power Wireless Sensor One embodiment of the present invention relates to a building condition monitoring system using a low-power wireless sensor. The following description merely provides background information related to the present embodiment and does not constitute prior art. With the recent advancement of ICT and smart technologies, various technologies are being developed to monitor the operational status of buildings and control their operation based on the monitoring results. In particular, systems that collect information related to building operations using various sensors are being developed. To efficiently manage multiple sensors when collecting information on building operations, research is being conducted on condition monitoring systems that utilize low-power wireless sensors, which do not consume significant power. Low-power wireless sensors minimize power consumption for operation by converting ambient energy into power using energy harvesters or by operating at low power, such as with SAW sensors. Low-power wireless sensors can reduce the burden of maintenance compared to conventional wired sensors. When using low-power wireless sensors, the sensor does not operate continuously but is temporarily activated according to a preset cycle, which can result in the sensing data collection process being somewhat erratic. In particular, when a monitoring server collecting sensing data attempts to check the sensor's status, there is a problem in that it is difficult to immediately verify the sensor's status if the sensor is in idle mode. FIG. 1 is a drawing showing a building condition monitoring system according to the present embodiment. FIG. 2 is a drawing showing a building condition monitoring device according to the present embodiment. FIG. 3 is a flowchart illustrating a building condition monitoring method according to the present embodiment. FIG. 4 is a flowchart illustrating a method for monitoring building conditions according to the amount of supercapacitor charge according to the present embodiment. FIG. 5 is a diagram showing the synchronization of the data transmission cycle of a wireless sensor according to the present embodiment. Hereinafter, the present embodiment will be described in detail with reference to the attached drawings. FIG. 1 is a drawing showing a building condition monitoring system according to the present embodiment. The building condition monitoring system according to the present embodiment targets a building that includes operating facilities that are not in continuous operation. The Building Condition Monitoring System performs energy saving to achieve carbon neutrality by managing building energy using a Building Energy Management System (BEMS). For energy synthesis, the Building Condition Monitoring System powers multiple low-power wireless sensors and communication modules installed within the building using electricity generated through energy harvesting. The building condition monitoring system according to the present embodiment includes a building condition monitoring device (110), an edge device (120), a network (130), and a central server (140). The components included in the building condition monitoring system are not necessarily limited thereto. The building condition monitoring device (110) is equipped with a memory for storing a program or protocol for communicating with a low-power wireless sensor (250) in the building, a microprocessor for executing the program to perform calculations and control, etc. The building condition monitoring device (110) is a variety of devices equipped with a communication device, such as a communication modem, for communicating with various devices or wired/wireless networks, a memory for storing various programs and data, and a microprocessor for executing programs to perform calculations and control. According to at least one embodiment, the memory may be a computer-readable recording/storage medium such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, an optical disk, a magnetic disk, or a Solid State Disk (SSD). According to at least one embodiment, the microprocessor may be programmed to selectively perform one or more operations and functions described in the specification. According to at least one embodiment, the microprocessor may be implemented as hardware, such as an Application Specific Integrated Circuit (ASIC), wholly or partially. When the building condition monitoring device (110) operates in sleep mode, it switches the low-power wireless sensor (250) to an active mode according to a preset period and the reception of an external event detection signal. When the building condition monitoring device (110) operates in active mode, it activates the low-power wireless sensor (250) and receives sensing data collected from the activated low-power wireless sensor (250) and transmits it to the central server (140). The building condit