Abstract: Provided is a sensor module, a method for manufacturing a sensor module, and a blood pressure measurement device with a highly smooth surface and high sensor accuracy. A sensor module 63 includes: a pressure sensor portion 71; a sensor base 72 including a support wall portion 72a with flow holes 72d to 72g formed extending through the support wall portion 72a from one main surface side to the other main surface side, the pressure sensor portion 71 being disposed on the one main surface side of the sensor base 72; a sensor head cover 73 including an opening 73a at a position opposite a sensor 71a and disposed on the one main surface side of the support wall portion 72a of the sensor base 72 with a gap 79 that communicates with the flow holes 72d to 72g and the opening 73a formed therebetween; and a soft portion 74 disposed in the opening 73a that covers the pressure sensor portion 71.

Abstract: Provided is a solenoid valve drive device capable of accurately controlling a hysteresis value of a drive current for driving a solenoid valve. The solenoid valve drive device according to the present invention controls a set value of a hysteresis or a time width of the hysteresis based on a difference between an extreme value of the hysteresis in a peak hold period of a drive current and a set value of the extreme value.

Abstract: Provided is a solenoid valve drive device capable of accurately controlling a hysteresis value of a drive current for driving a solenoid valve. The solenoid valve drive device according to the present invention controls a set value of a hysteresis or a time width of the hysteresis based on a difference between an extreme value of the hysteresis in a peak hold period of a drive current and a set value of the extreme value.

Abstract: Provided is a sensor module, a method for manufacturing a sensor module, and a blood pressure measurement device with a highly smooth surface and high sensor accuracy. A sensor module 63 includes: a pressure sensor portion 71; a sensor base 72 including a support wall portion 72a with flow holes 72d to 72g formed extending through the support wall portion 72a from one main surface side to the other main surface side, the pressure sensor portion 71 being disposed on the one main surface side of the sensor base 72; a sensor head cover 73 including an opening 73a at a position opposite a sensor 71a and disposed on the one main surface side of the support wall portion 72a of the sensor base 72 with a gap 79 that communicates with the flow holes 72d to 72g and the opening 73a formed therebetween; and a soft portion 74 disposed in the opening 73a that covers the pressure sensor portion 71.