초록 ▼

A pneumatic control system, control unit and method of making the same are provided, the system comprising a pneumatic source, a pneumatically operated device that produces an output, and a control unit for interconnecting the source to the device. The control unit has an input interconnected to the

A pneumatic control system, control unit and method of making the same are provided, the system comprising a pneumatic source, a pneumatically operated device that produces an output, and a control unit for interconnecting the source to the device. The control unit has an input interconnected to the source and an output interconnected to the device, the control unit having a set point for selecting a desired output of the device. The control unit has a valve unit for controlling the interconnection between the input and the output thereof so as to regulate the pressure value in the output of the control unit. The control unit has a regulating unit for operating the valve unit to tend to produce an output of the device that corresponds to the selected output of the set point. The regulating unit senses the pressure value in the output of the control unit and operates the valve unit so as to produce a pressure value in the output of the control unit that is substantially equal to the pressure value that will cause the device to produce the selected output.

대표청구항 ▼

In a pneumatic control system comprising a pneumatic source, a pneumatically operated device that produces an output, and a control means for interconnecting said source to said device, said control means having an input means interconnected to said source and an output means interconnected to said

In a pneumatic control system comprising a pneumatic source, a pneumatically operated device that produces an output, and a control means for interconnecting said source to said device, said control means having an input means interconnected to said source and an output means interconnected to said device, said control means having set point means for selecting a desired output of said device, said control means having valve means for controlling the interconnection between said input means and said output means so as to regulate the pressure value in said output means, said control means having regulating means for operating said valve means to tend to produce an outpout of said device that corresponds to said selected output of said set point means, the improvement wherein said regulating means has a silicon transverse voltage strain gauge means that senses said pressure value in said output means and operates said valve means so as to produce a pressure value in said output means that is substantially equal to a pressure value that will cause said device to produce said selected output, said control means comprising a relay means having said input means and said output means, said relay means having a pilot input and a valve unit for interconnecting said input means to said output means in relation to the pressure value in said pilot input at said valve unit, said valve means being interconnected to said source and to said pilot input whereby said regulating means operates said valve means to create said pressure value in said pilot input at said valve unit in relation to the sensed pressure value in said output means, said regulating means also having another silicon transverse voltage strain gauge means that senses the pressure value in said pilot input at said valve unit thereof.