Sensor control apparatus and image apparatus

An image forming apparatus, comprising:

• a sensor control apparatus;
• a container configured to receive a sheet;
• an image forming unit configured to form an image on the sheet;
• and
• a conveyor configured to convey the sheet from the container to the image forming unit through a conveyance path,
• the sensor control apparatus including:
• a control unit;
• and
• a plurality of sensors connected in series to the control unit,
• the plurality of sensors each including:
• a detector configured to perform a detection operation based on a first voltage applied from the control unit;
• a first switch provided on an application path for applying a voltage, which extends from the control unit to the detector;
• a second switch provided on a supply path for supplying the voltage applied from the control unit to a sensor connected in a subsequent stage;
• and
• a conduction control unit configured to:
• bring the first switch into conduction and cut off the second switch in a case where the voltage on the application path is the first voltage;
• and
• cut off the first switch and bring the second switch into conduction in a case where the voltage on the application path is a second voltage, which is different from the first voltage,
• the control unit being configured to cause a sensor in a first stage to perform the detection operation by applying the first voltage to the sensor in the first stage, and then cause a sensor in a second stage to perform the detection operation by applying the second voltage and then applying the first voltage,
• the plurality of sensors being arranged on the conveyance path at predetermined intervals, and being configured to detect the sheet.