The disclosure is related to a head-mounted display device and an adjusting method thereof. The head-mounted display device is adapted to be worn on a human face and includes a main body, a contact part and at least one airbag. The contact part is disposed on the main body, and the contact part includes a frame and a nose contact portion connected to each other. The airbag is disposed on the nose contact portion of the contact part, and the airbag is inflatable in order to decrease a gap between the nose contact portion and the human face.

A physical quantity measurement device measures a physical quantity of a fluid. The device includes a passage flow channel, a branch flow channel, a flow channel partition portion that separates the passage flow channel and the branch flow channel to have the branch flow channel branch off from the passage flow channel, and a physical quantity detector. The flow channel partition portion has a partition top portion as an upstream-side end that is not exposed through the inflow port.

A physical quantity measurement device measures a physical quantity of a fluid. The device includes a passage flow channel, a branch flow channel, a flow channel partition portion that separates the passage flow channel and the branch flow channel to have the branch flow channel branch off from the passage flow channel, and a physical quantity detector. The flow channel partition portion has a partition top portion as an upstream-side end that is not exposed through the inflow port.

The invention discloses a testing device and method for evaluating effects of CO.sub.2 reaction rate of acid rock plate. The testing device includes an acid fluid conveying unit, a CO.sub.2 conveying unit, a mixing tank, a plate holder, a recycling fluid tank, and a vacuum pump. The mixing tank includes an acid fluid inlet, a CO.sub.2 inlet, and a miscible fluid outlet. The acid fluid inlet is connected with the acid fluid conveying unit, the CO.sub.2 inlet is connected with the CO.sub.2 conveying unit, the miscible fluid outlet is connected with the plate holder, the plate holder is connected with the recycling fluid tank, and the recycling fluid tank is connected to the vacuum pump. The CO.sub.2 conveying unit includes a CO.sub.2 cylinder and a gas booster pump which is connected to the cylinder. The outlet of the pump is connected to the gas inlet of the mixing tank.

The invention discloses a testing device and method for evaluating effects of CO.sub.2 reaction rate of acid rock plate. The testing device includes an acid fluid conveying unit, a CO.sub.2 conveying unit, a mixing tank, a plate holder, a recycling fluid tank, and a vacuum pump. The mixing tank includes an acid fluid inlet, a CO.sub.2 inlet, and a miscible fluid outlet. The acid fluid inlet is connected with the acid fluid conveying unit, the CO.sub.2 inlet is connected with the CO.sub.2 conveying unit, the miscible fluid outlet is connected with the plate holder, the plate holder is connected with the recycling fluid tank, and the recycling fluid tank is connected to the vacuum pump. The CO.sub.2 conveying unit includes a CO.sub.2 cylinder and a gas booster pump which is connected to the cylinder. The outlet of the pump is connected to the gas inlet of the mixing tank.

The physical quantity measurement device includes a passage flow channel, a branch flow channel, and a physical quantity detection unit. A direction along which a pair of opposing surfaces facing each other are arranged is defined as a width direction, and a direction orthogonal both to the width direction and an inflow direction of fluid through an inflow port is defined as a height direction. An inner peripheral surface of the passage flow channel includes a height narrowing surface that narrows the passage flow channel so that a height dimension of the passage flow channel along the height direction is gradually reduced toward the outflow port while reserving a parallel region extending linearly between the inflow port and the outflow port parallel to the inflow direction. The height narrowing surface is not exposed through the inflow port in the inflow direction.

The physical quantity measurement device includes a passage flow channel, a branch flow channel, and a physical quantity detection unit. A direction along which a pair of opposing surfaces facing each other are arranged is defined as a width direction, and a direction orthogonal both to the width direction and an inflow direction of fluid through an inflow port is defined as a height direction. An inner peripheral surface of the passage flow channel includes a height narrowing surface that narrows the passage flow channel so that a height dimension of the passage flow channel along the height direction is gradually reduced toward the outflow port while reserving a parallel region extending linearly between the inflow port and the outflow port parallel to the inflow direction. The height narrowing surface is not exposed through the inflow port in the inflow direction.

An example method includes receiving, by one or more processors and via a sensor, a signal representing operational characteristics of a device included in an aircraft; determining, by the one or more processors and based on the signal, a partial discharge intensity value; receiving, by the one or more processors and via an environmental sensor, at least one environmental measurement of the device; modifying, by the one or more processors and based on the at least one environmental measurement, the partial discharge intensity value to determine a modified partial discharge intensity value; and responsive to determining that the modified partial discharge intensity value satisfies a threshold, outputting an alert signal for the device.

A blower, including a scroll casing, a fan impeller, a motor, and a pressure measuring connector. The scroll casing includes a chamber, an air inlet, and an air outlet. The air inlet and the air outlet communicate with the chamber. The motor is disposed on the scroll casing. A drive end of the motor is inserted into the chamber and is connected to the fan impeller. The pressure measuring connector is disposed on the scroll casing. A channel is disposed in the pressure measuring connection, and the channel communicates with the chamber. The channel includes a first subchannel and a second subchannel. The first subchannel communicates with the second subchannel, and an inner diameter of the first subchannel is larger than an inner diameter of the second subchannel.

A blower, including a scroll casing, a fan impeller, a motor, and a pressure measuring connector. The scroll casing includes a chamber, an air inlet, and an air outlet. The air inlet and the air outlet communicate with the chamber. The motor is disposed on the scroll casing. A drive end of the motor is inserted into the chamber and is connected to the fan impeller. The pressure measuring connector is disposed on the scroll casing. A channel is disposed in the pressure measuring connection, and the channel communicates with the chamber. The channel includes a first subchannel and a second subchannel. The first subchannel communicates with the second subchannel, and an inner diameter of the first subchannel is larger than an inner diameter of the second subchannel.