Drexel University

Beijing Sevenstar Electronics Co., Ltd.

Beijing Sevenstar Flow Co., Ltd.

Beijing Aurasky Electronics Co., Ltd.

Di Zhao

Changhua Mou

Michel W Barsoum

Varun Natu

Feng Zhang

Qi Wang

Lei Hu

Xiao Li

Qianyi Su

Maolin Wang

Bowen Deng

Nelson Urdaneta

Zhen Peng

Chen Sui

Zhaoxing Li

Qingli Yang

Provided is pressure sensor, including top cover assembly, upper seat, movable membrane; each of top and bottom of upper seat is provided with opening, top cover assembly seals opening at top of upper seat, movable membrane seals opening at bottom of upper seat; top cover assembly, upper seat, movable membrane form pressure reference chamber, and pressure sensor detects gas pressure on side of movable membrane away from top cover assembly based on state of movable membrane; at least one gas guide passage is formed at top cover assembly, and is configured to connect pressure reference chamber to outside; top cover assembly includes at least one blocking member configured to seal gas guide passage; and blocking member seals gas guide passage after being heated to temperature higher than preset melting temperature to be at least partially melted and being cooled to solidify. Manufacturing method for pressure sensor is further provided.

Pressure sensor with manufacturing efficiency and structure stability

The present disclosure describes a crumpled form of Mxene materials, and methods of making and using these novel compositions.

Anodes crumpled MXene compositions, composites, and devices

The present disclosure describes a crumpled form of MXene materials, and methods of making and using these novel compositions.

Crumpled mesoporous MXene powders synthesized by acid-, base-, or salt-induced crumpling

An apparatus of mass flow controlling for use in an integrated gas delivery system, comprising an input terminal, a sensor unit, an electromagnetic valve, and a control unit. The control unit comprises an A/D converter, a microprocessor, and a valve control circuit. The A/D converter converts a flow rate setting signal inputted by the input terminal into a first digital signal, and converts a flow rate detection signal outputted by the sensor unit into a second digital signal. The microprocessor further comprises a control module and a calculation module. The valve control circuit opens the electromagnetic valve according to the first control signal only, and further regulates an openness of the electromagnetic valve according to the first control signal and the second control signal. It is concluded that response time of the mass flow control apparatus of the present invention is shorten, and control quality is improved.

Method and apparatus of mass flow controlling for use in integrated gas delivery system

A flow meter is disclosed, which composes an operational amplifier, a digital potentiometer, a sensor coil, and fixed resistors R, Rand R. One end of the coil is connected to the non-inverting input terminal of the amplifier, the other end is grounded. The Ris connected between the non-inverting input terminal and the output terminal of the amplifier, the inverting input terminal of the amplifier is connected to one end of Rand R, the other end of Ris connected to the output terminal of the amplifier, and the other end of Ris grounded. The connecting end of Rand the output terminal of the amplifier is connected to the high side of the potentiometer, the grounded end of Ris connected to the low side of the potentiometer, and the inverting input terminal of the amplifier is also connected to the sliding end of the potentiometer.

Flow meter with digital temperature compensation

Growing community of inventors

Beijing, China

Di Zhao