초록 ▼

An analog scanner for the control of various industrial, agricultural and domestic operations and processes comprising at least two pairs of probes utilized for measuring a physical property of a medium therebetween including at least a pair of control signal sources, at least a pair of reference le

An analog scanner for the control of various industrial, agricultural and domestic operations and processes comprising at least two pairs of probes utilized for measuring a physical property of a medium therebetween including at least a pair of control signal sources, at least a pair of reference level controllers, at least a pair of sensor selectors, and at least a pair of control actuators. A timing mechanism including a counter is connected to the signal sources for selectively energizing one of the signal sources associated with a particular position of the counter in sequence with the other of the sources. Each pair of sensor selectors senses the physical property of the medium between its probes and develops a voltage proportionate to the value of the physical property of the medium between the probes.

대표청구항 ▼

An analog scanner for at least two pairs of probes utilized for measuring a physical property of a medium therebetween comprising: a power supply, at least a pair of control signal sources, at least a pair of reference level controllers, at least a pair of sensor selectors, at least a pair of contro

An analog scanner for at least two pairs of probes utilized for measuring a physical property of a medium therebetween comprising: a power supply, at least a pair of control signal sources, at least a pair of reference level controllers, at least a pair of sensor selectors, at least a pair of control actuators, means for connecting said signal sources, reference level controllers, sensor selectors and control actuators to said power supply for energization thereof, a timing mechanism, a counter connected to said timing mechanism for movement through a counting cycle, means for connecting said counter to said pair of signal sources for selectively energizing one of the signal sources associated with a particular position of said counter in sequence with the other of said sources, the signals from said one of said signal sources enabling an associate one of the pairs of level controllers, sensor selectors, and controller actuators, each of said sensor selectors comprising a pair of probes, said enabled sensor selector senses the physical property of the medium between said probes and develops a voltage across said pair of probes proportionate to a value of the physical property of the medium between said probes, said associated level controller sensing at least a portion of the voltage appearing across said pair of probes and transmitting signals to a voltage comparator when energized by a particular voltage appearing across said probes, said associated controller actuator upon enabling thereof providing a signal for implementing a given control function, and a voltage comparator regulator means energized by said power source and connected to receive signals from said probes and said associated level controller for comparing analog values of signals from the probes with signals from said associated level controller and generating signals responsive to conditions of the medium sensed, said generated signals determining the energization of said one of said signal sources.