Temperature measuring equipment with polynomeal synthesis

Claim 2

Apparatus for measuring temperature with a high degree of accuracy, comprising: a. non-linear temperature sensing means having a given set of characteristics, for providing an output signal indicative of the sensed temperature, and b. cascade accumulation means including memory means for storing the number indications determined by the given set of characteristics of said temperature sensing means, and responsive to the output signal of said temperature sensing means for repetitive cascade accumulation of said stored number indications to provide an accurate indication of the measured temperature, said cascade accumulation means comprising at least one memory means and at least one register means and a device capable of receiving and storing digital information and said cascade accumulation means operative to effect one cascade accumulation in a manner such that the content of said memory means is added to the content of said register means and the content of said register means is added to the content of said device.

Claim 3

Apparatus as claimed in claim 1, wherein there is further included means for varying the number indications stored at said memory means dUring repetitive cascade accumulations.

Claim 4

Apparatus as claimed in claim 1, wherein there is further included means for controlling the execution of said cascade accumulation during repetitive cascade accumulations.

Claim 5

Apparatus as claimed in claim 1, further including means for generating pulses, wherein said one cascade accumulation is executed corresponding to each pulse, and there is further included means for detecting the coincidence of the content of said device with the signal derived from said temperature sensing means, and a count means for counting each of the pulses until the above-mentioned coincidence is detected.

Claim 6

Apparatus as claimed in claim 1, further including means for generating pulses, wherein said one cascade accumulation is executed corresponding to each pulse and there is further included means for detecting the coincidence of the content of said device with the signal derived from said temperature sensing means and applying the above-mentioned pulse to a second cascade accumulation means until said coincidence is detected, said second cascade accumulation means comprising at least one memory means and at least one register means and a device capable of receiving and storing digital information and said second cascade accumulation means operative to effect one cascade accumulation in a manner such that the content of said memory means of said second cascade accumulation means is added to the content of said register means of said second cascade accumulation means and the content of said register means of said second cascade accumulation means is added to the content of said device of said second cascade accumulation means and above-mentioned one cascade accumulation of said second cascade accumulation means is executed corresponding to each of said applied pulses.

Claim 7

Apparatus as claimed in claim 1, wherein said device is a counter.

Claim 8

Apparatus as claimed in claim 1, wherein said temperature sensing means provides its output signal in the form of a plurality of pulses and applies these pulses to said cascade accumulation means, and said cascade accumulation is executed a number of times coresponding to the change of the content of said device at every pulse applied.

Claim 9

Apparatus as claimed in claim 7, wherein there is further included means for applying pulses corresponding in number to the content of said device to a second cascade accumulation means comprising at least one memory means and at least one register means and a device capable of receiving and storing digital information and said second cascade accumulation means operative to effect one cascade accumulation in a manner such that the content of said memory means of said second cascade accumulation means is added to the content of said register means of said second cascade accumulation means and the content of said register means of said second cascade accumulation means is added to the content of said device of said second cascade accumulation means and said one cascade accumulation of said second cascade accumulation means is executed corresponding to each of said pulses applied to said second cascade accumulation means.

Claim 10

Apparatus as claimed in claim 7, wherein said device is a counter.

Claim 11

Apparatus as claimed in claim 7, wherein said temperature sensing means comprises a platinum and platinum rhodium alloy thermocouple, and there is further included means for generating a number of output pulses corresponding exponentially to the output of said thermocouple, thereby to compensate the characteristics of the low temperature region of said thermocouple.

Claim 12

Apparatus as claimed in claim 1, wherein said register and said device are memories and said cascade accumulation means comprises at least first, second and third memories and at least first and second adders and means for reading out substantially simultaneously the contents of all of said memories and applying the contents of said first and second memories to said first adder, and applying the Content of said third memory and the output of said first adder to said second adder.

Claim 13

Apparatus as claimed in claim 1, wherein said temperature sensing means comprises a thermocouple and there is further included means for maintaining a second temperature sensing means in equilibrium with the temperature of reference junction of said thermocouple, thereby to compensate for the variation of the reference temperature of said thermocouple.

Claim 14

Apparatus for measuring temperature with a high degree of accuracy, comprising: a. non-linear temperature sensing means having a given set of characteristics for providing a number of pulses representing the output signal of the temperature sensor; and b. cascade accumulation means including memory means for storing the number indications determined by the given set of characteristics and having N stages, said cascade accumulation means repetitively cascade accumulating the memorized contents of said memory means to provide an output from the Nth stage indicative of t of the following equation: E a + bt + ct2 + + xtN where a, b, c, -x are constants determined by the set of characteristics of said temperature sensing means and E the number of pulses representing the output signal of the temperature sensor, and t represents the temperature sensed.

Claim 15

Apparatus for measuring temperature with a high degree of accuracy, comprising: a. non-linear temperature sensing means having a given set of characteristics for providing a number of pulses representing the output signal of the temperature sensor; and b. cascade accumulation means including memory means for storing the number indications determined by the given set of characteristics and having N stages, said cascade accumulation means repetitively cascade accumulating the memorized contents of said memory means to provide an output from the Nth stage indicative of t of the following equation: E a + bt + ct2 + + xtN where a, b, c, -x are constants determined by the set of characteristics of said temperature sensing means and E the number of pulses representing the output signal of the temperature sensor, and t represents the temperature sensed.