Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1993-03-17
1994-10-04
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374130, G01J 552, G01J 508
Patent
active
053520394
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a temperature and/or temperature difference measuring device.
To make such measurements, it is known to use heat flux sensors which pick up the infrared radiation emitted by an area of the surface of a body, so as to deduce therefrom the temperature of the area and/or temperature differences.
However, these known devices perform poorly when measuring very small temperature differences and they are not easy to use.
The particular aim of the present invention is to remedy these disadvantages and provide a remote temperature and/or temperature difference measuring device which comprises a measuring circuit comprising a sensor of the heat flux emitted by an area of the surface of a body and a housing carrying this measuring circuit.
The remote temperature and/or temperature difference measuring device comprises, according to the present invention, a measuring circuit comprising a sensor of the heat flux emitted by an area of the surface of a body and a portable housing carrying the aforesaid sensor as well as means for marking the explored area.
According to one subject of the invention, the measuring circuit comprises a memory circuit connected to the heat sensor, a storage input unit such as a push button for effecting, at any chosen instant, the storage in this memory circuit of the signal coming from the aforesaid heat sensor, which then constitutes a reference signal, a comparator, one of the inputs of which receives the output signals from the heat sensor and the other input of which is connected to the said memory circuit providing a reference signal, this comparator providing at its output a signal corresponding to the difference between the said reference signal and the signal coming from the heat sensor, as well as signaling means connected to the output of the comparator and providing a signal corresponding to the aforesaid difference.
According to the invention, the said marker means preferably comprise means enabling the said housing to be stationed in a specified position with respect to the surface of the body and may furthermore be adjustable.
In a preferred variant, the said marker means comprise at least two light emitters whose light beams produce on the surface of the body light spots which, only when the housing is in the aforesaid specified position, are in specified positions with respect to one another.
According to the invention, the light emitters can advantageously be arranged on either side of the volume sighted or explored by the heat sensor and emitting light beams inclined with respect to the axis of this volume.
According to the invention, the said light emitters are preferably adjustable and are rotationally connected so as to vary the angle of their axis with respect to the axis of the explored or sighted volume.
According to the invention, at least one of the aforesaid traces preferably coincides with the surface of the said body explored by the heat sensor.
The device according to the invention can furthermore comprise means such that the explored or sighted volume is a cylinder.
In a preferred embodiment, the said housing has an aperture behind which is stationed a reflecting means, the heat sensor being stationed in front of this reflecting means, this reflecting means being such that the explored or sighted volume is cylindrical.
The said housing can also comprise a lateral grip for grasping, to the base of which is connected the aforesaid push button.
The present invention will be better understood on studying a remote temperature and/or temperature difference measuring device described by way of non-limiting example and illustrated by the drawing in which:
FIG. 1 represents a section in elevation of a temperature measuring device according to the present invention;
FIG. 2 shows an exterior view of the temperature measuring device represented in FIG. 1;
FIG. 3 represents a view of the left side of the temperature measuring device represented in FIG. 1;
FIG. 4 represents a view corresponding to FIG. 3, of the temperature measuring device,
REFERENCES:
patent: 3017513 (1962-01-01), Messelt
patent: 4005605 (1977-02-01), Michael
patent: 4030362 (1977-06-01), Dimeff
patent: 4078869 (1978-03-01), Honeycutt
patent: 4315150 (1982-02-01), Darringer et al.
patent: 4636093 (1987-01-01), Nagasaka et al.
patent: 4743122 (1988-05-01), Yamano et al.
patent: 4883364 (1989-11-01), Astheimer
patent: 4904997 (1990-02-01), Chen et al.
patent: 4906105 (1990-03-01), Geake
patent: 4969748 (1990-11-01), Crowley et al.
patent: 5172978 (1992-12-01), Normura et al.
Patent Abstracts of Japan, vol. 5, No. 60 (P-58)(732) Apr. 23, 1981 (Daido Tokushuko K.K.) Feb. 10, 1981 56-14125.
Barral Jean-Pierre
Colomb Francois
Million Bernard
Cuchlinski Jr. William A.
Ortomedic
Worth W. Morris
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