<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _tegra_id(self):
 """Try to detect the id of aarch64 board."""

        board_value = self.detector.get_device_model()
        if 'tx1' in board_value:
            return JETSON_TX1
        elif 'quill' in board_value:
            return JETSON_TX2
        elif 'xavier' in board_value:
            return JETSON_XAVIER
        elif 'nano' in board_value:
            return JETSON_NANO
        return None