問78
頻出度★☆☆
IoT デバイスと IoT サーバで構成され, IoT デバイスが計測した外気温を IoT サーバへ送り, IoT サーバからの指示で IoT デバイスが窓を開閉するシステムがある。 このシステムの IoT デバイスに搭載された, 外気温を電気信号に変換する役割をもつものはどれか。
令和8年度 ITパスポート試験 問78
テクノロジ系コンピュータ構成要素 › 入出力デバイス
This question's explanation and your answers so far.
解説
問 78
Incorrectア
An actuator is a component that works in the opposite direction from a sensor; it receives an electrical signal and converts it into physical motion (rotation, movement, etc.). In this question, the driving part that opens and closes the window based on instructions from the IoT server is the actuator, and it does not play the role of converting the outside air temperature into an electrical signal, so it is incorrect.
Incorrectイ
Edge computing refers to a method or concept of performing processing near the terminals or the field (the edge) that generate the data; it is a term, not a component that converts a physical quantity into an electrical signal, so it is incorrect.
Incorrectウ
Carrier aggregation is a mobile-phone communication technology that bundles multiple frequency bands (carriers) together to increase the communication speed; it has nothing to do with the role of converting the outside air temperature into an electrical signal, so it is incorrect.
- エ
正解 The correct answer is “エ Sensor”. A sensor is an element or device that detects physical quantities such as temperature, light, pressure, and sound, or environmental conditions, and converts them into an electrical signal that it outputs. In this question, the IoT device measures the physical quantity of the “outside air temperature” and sends it to the IoT server as an electrical signal, so the component that plays the role of converting the outside air temperature into an electrical signal is the sensor (temperature sensor).
ここがポイント
- A sensor is an input-side component that detects physical quantities such as temperature, light, and pressure, or environmental conditions, and converts them into an electrical signal. Conversely, the output-side component that converts an electrical signal into physical motion is the actuator.
- In an IoT system, keep clear the division of roles between input and output: measure the environment with a sensor → send it to the server → control the equipment with an actuator based on instructions.
用語