US4955727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for a non-contact measuring of a temperature of a body
Assignee: Individual
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Filing: 1989-08-22
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Granted: 1990-09-11
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Expires: 2009-08-22
Abstract
Abstract In order to measure the temperature of a body (3) extensively independently of interference radiation (θ U1 ), a sensor (1) is provided wherein the radiation (θ 3 ) of the body (3) is chopped by means of a chopper (5) between the sensor (1) and the body (3). Since extraneous radiation originates predominantly from losses at the sensor (1) as well as from frictional heat of the chopper (5) in case a mechanical chopper (5) is provided, the housing temperature of the sensor (1) is detected for correction purposes on the side of the chopper (5) facing the sensor (1) by means of an additional sensor (13). Around and in the zone of the travel path of the mechanical chopper (5), by means of a third sensor (15), the ambient temperature of the chopper is detected, again for correction purposes.
Inventors
- 👤 Hardy P. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:15
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/08; G01J5/0803; G01J5/0805; G01J5/06; G01J5/064
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
181 words
A temperature measuring apparatus for a non-contact measurement of a temperature of a body, said apparatus comprising: a first temperature sensor means, having an input for receiving heat radiation, for generating an output signal dependent on heat radiation received from a direction towards said body; a heat radiation chopper means, disposed in front of said heat radiation receiving input of said first temperature sensor means located between said body and said first for chopping said heat radiation; and at least one second temperature sensor means arranged in an area adjacent said heat radiation chopper means and said first temperature sensor means, said area being disposed on a same side of said chopper means as said first temperature sensor means; wherein said second temperature sensor means generates a signal dependent on a temperature in said area; and wherein said output signal generated by said first temperature sensor is dependent on a temperature of said body and said signal generated by said second temperature sensor means is used for influencing said output signal to reduce its dependency on said temperature in said area.
Claim 2
Dependent Claim
181 words
A temperature measuring apparatus for a non-contact measurement of a temperature of a body, said apparatus comprising: a first temperature sensor means, having an input for receiving heat radiation, for generating an output signal dependent on heat radiation received from a direction towards said body; a heat radiation chopper means, disposed in front of said heat radiation receiving input of said first temperature sensor means located between said body and said first for chopping said heat radiation; and at least one second temperature sensor means arranged in an area adjacent said heat radiation chopper means and said first temperature sensor means, said area being disposed on a same side of said chopper means as said first temperature sensor means; wherein said second temperature sensor means generates a signal dependent on a temperature in said area; and wherein said output signal generated by said first temperature sensor is dependent on a temperature of said body and said signal generated by said second temperature sensor means is used for influencing said output signal to reduce its dependency on said temperature in said area.
Claim 3
Dependent Claim
32 words
A temperature measuring apparatus according to claim 1, wherein said at least one second temperature sensor means is closely thermally coupled with a housing means for housing said first temperature sensor means.
Claim 4
Dependent Claim
25 words
A temperature measuring apparatus according to claim 1, wherein said at least one second temperature sensor means is closely thermally coupled with said chopper means.
Claim 5
Dependent Claim
39 words
A temperature measuring apparatus according to claim 1, wherein said at least one second temperature sensor means is connected as a controlled variable pick up into a temperature feedback control circuit for feedback controlling a temperature in said area.
Claim 6
Dependent Claim
51 words
A temperature measuring apparatus according to claim 1, further comprising: mechanically moving chopper means included within said chopper means for chopping said heat radiation, and wherein said at least one second temperature sensor means is arranged adjacent to an area of a path of motion of said mechanically moving chopper means.
Claim 7
Dependent Claim
53 words
A temperature measuring apparatus according to claim 1, further comprising: evaluating means connected to receive outputs of at least said first and said at least one second temperature sensor means for evaluating said outputs by performing said influencing operation and providing said output signal which is dependent on said temperature of said body.
Claim 8
Dependent Claim
175 words
A temperature measuring apparatus according to claim 1, wherein: said at least one second temperature sensor means is located adjacent said chopper means; said signal generated by said second temperature sensor means being fed to a first input of a multiplication unit; a signal of an adjustable value being fed to a second input of said multiplication unit; an output signal of said multiplication unit being fed to a first input of a summation unit; an adjustable value signal being fed to a second input of said summation unit; said output signal of said first temperature sensor means being transmitted to a numerator input of a dividing unit; a denominator input of said dividing unit being fed with an output signal of said summation unit; and wherein an output signal of said dividing unit as well as said signal generated by said second temperature sensor means are transmitted to a further summation unit an output of which being connected to be provided as said output signal which is dependent on said temperature of said body.
Claim 9
Dependent Claim
36 words
A measuring apparatus according to claim 7, further comprising: storage means for storing said adjustable value signals, said storage means being connected to said second inputs of said multiplication unit and of said summation unit respectively.
Claim 10
Dependent Claim
37 words
A measuring apparatus according to claim 1, wherein said output signal of said first temperature sensor means is fed to average-value-forming means having an averaging time longer than that of the chopper period of said chopper means.
Claim 11
Dependent Claim
77 words
A temperature measuring apparatus according to claim 1, wherein said output signal of said first temperature sensor means being fed to threshold-value-sensitive means, an output of said threshold-value-sensitive means operatively connecting said output of said first temperature sensor means to be provided as said output signal which is dependent on said temperature of said body after said value of said output signal of said first temperature sensor means crosses a predetermined threshold level of said threshold-value-sensitive means.
Claim 12
Dependent Claim
26 words
A temperature measuring apparatus according to claim 10, wherein said threshold-value-sensitive means is adapted to respond to a predetermined change of input signal per unit time.
Claim 13
Dependent Claim
34 words
A temperature measuring apparatus according to claim 1, wherein said first temperature sensor means generates an output signal dependent on a change of heat radiation per time unit at said input for heat radiation.
Claim 14
Independent Claim
94 words
A method of non-contact measurement of a temperature of a body, comprising the steps of: placing temperature sensor means adjacent to said body and measuring a temperature adjacent said body; providing chopper means for chopping thermal radiation emitted by said body between said body and said temperature sensor means; said chopper means as measuring a temperature of an area, wherein said area is on a same side of said temperature sensor means; and using said additionally measured temperature to evaluate from an output signal of said temperature sensor means said temperature of said body.
Claim 15
Independent Claim
94 words
A method of non-contact measurement of a temperature of a body, comprising the steps of: placing temperature sensor means adjacent to said body and measuring a temperature adjacent said body; providing chopper means for chopping thermal radiation emitted by said body between said body and said temperature sensor means; said chopper means as measuring a temperature of an area, wherein said area is on a same side of said temperature sensor means; and using said additionally measured temperature to evaluate from an output signal of said temperature sensor means said temperature of said body.
Claim 16
Dependent Claim
33 words
A method according to claim 13, wherein said step of measuring said temperature of said area includes the step of: measuring a temperature of a housing means in accordance with said sensor means.
Claim 17
Dependent Claim
40 words
A method according to claim 13, wherein said step of measuring said temperature of said area includes the step of: measuring a temperature in an area adjacent said chopper means resulting from heat generated by operation of said chopper means.
Claim 18
Dependent Claim
23 words
A method according to claim 13, further comprising the step of: feed back controlling said temperature of said area to a predetermined value.
Claim 19
Dependent Claim
55 words
A method according to claim 13, wherein: a mechanically moved chopper means is provided in said chopper means to intermittently interrupt said heat radiation; and wherein the step of measuring said temperature of said area includes the step of measuring a temperature in an area adjacent a travel path of said mechanically moved chopper means.
Claim 20
Dependent Claim
56 words
A method according to claim 13, wherein the step of measuring said temperature of said area includes the step of: measuring a temperature in an area adjacent said chopper means; and wherein a temperature d by said temperature sensor means is corrected as a function of said temperature measured at said area adjacent said chopper means.
Claim 21
Dependent Claim
80 words
A method according to claim 18, further comprising the steps of: multiplying a first signal dependent on said temperature measured at said area by a first coefficient; adding a result of said multiplication to a second coefficient to obtain a second signal; dividing said output signal of said temperature sensor means by said second signal in order to obtain a third signal; and adding said third signal to said first signal to obtain a signal representing temperature of said body.
Claim 22
Dependent Claim
49 words
A method according to claim 19, further comprising the step of: empirically determining said first and second coefficients from at least two measurements at a predetermined body temperature and two values of said temperature measured at said area, adjacent said chopper means, and storing said first and second coefficients.
Claim 23
Dependent Claim
35 words
A method according to claim 13, further comprising the step of: averaging an output signal from said temperature sensor means over a plurality of chopper periods of said chopper means prior to a further evaluation.
Claim 24
Dependent Claim
73 words
A method according to claim 13, further comprising the step of: enlarging a body volume element of which the temperature measurement is representative for its thermal energy content; wherein the step of measuring a temperature adjacent said body by the temperature sensor means is effected in an area of a recess provided in said body, said recess being already in existence in said body or provided therein for the purpose of temperature measurements.
Claim 25
Dependent Claim
53 words
A method according to claim 13, further comprising the step of: moving the body relative to said temperature sensor means; and wherein a chopper period of said chopper means for chopping said thermal radiation is less than a time span during which the recess is within a measuring range of said sensor means.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |