This is sometimes referred to as a seat occupancy detector, and the same type of system can also be used to trip a seat belt warning indicator or alarm.
A na-akpọ nke a mgbe ụfọdụ dịka onye nchọpụta nọ n'ime oche, na ụdị usoro ahụ nwekwara ike iji mee njem iji gosi ịdọ aka ná ntị ma ọ bụ mkpu.