In the gate/dairy example, which device is used to detect the identity of a cow?

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Multiple Choice

In the gate/dairy example, which device is used to detect the identity of a cow?

The core idea here is identifying the animal as it interacts with the gate, not just sensing that something is there. In a dairy gate setup, the cow carries a tag that holds a unique ID, and an RF antenna at the gate acts as the reader to retrieve that ID as the cow comes into range. This contactless read lets the system know exactly which cow is present, so it can log attendance or decide whether to open the gate. Why this is the right choice: an RF antenna paired with the cow’s RFID tag provides a unique, verifiable identity. The other options don’t supply that identifying information. Light sensors can tell that a cow is at the gate or in a particular position, but they can’t distinguish which cow it is. Pneumatic arms are simply gate actuators that move the barrier; they don’t identify anyone. A movement sensor in the pendant could track activity, but it doesn’t reliably convey a unique ID to the gate system, so it can’t be used to identify the cow on its own. So reading the cow’s RFID tag with an RF antenna is the mechanism that detects which cow is at the gate.

The core idea here is identifying the animal as it interacts with the gate, not just sensing that something is there. In a dairy gate setup, the cow carries a tag that holds a unique ID, and an RF antenna at the gate acts as the reader to retrieve that ID as the cow comes into range. This contactless read lets the system know exactly which cow is present, so it can log attendance or decide whether to open the gate.

Why this is the right choice: an RF antenna paired with the cow’s RFID tag provides a unique, verifiable identity. The other options don’t supply that identifying information. Light sensors can tell that a cow is at the gate or in a particular position, but they can’t distinguish which cow it is. Pneumatic arms are simply gate actuators that move the barrier; they don’t identify anyone. A movement sensor in the pendant could track activity, but it doesn’t reliably convey a unique ID to the gate system, so it can’t be used to identify the cow on its own.

So reading the cow’s RFID tag with an RF antenna is the mechanism that detects which cow is at the gate.

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