CN2245764Y

CN2245764Y - Feeler for infrared thermometer

Info

Publication number: CN2245764Y
Application number: CN 95227167
Authority: CN
Inventors: 张振昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-14
Filing date: 1995-12-14
Publication date: 1997-01-22
Anticipated expiration: 2005-12-14

Abstract

The utility model relates to a probe for an infrared thermometer. Due to the reason of a probe, the traditional infrared thermometers have the problem of low measuring accuracy. The probe of the utility model comprises a shell and a light guiding pipe which is provided with a long light guiding path; the inner pipe wall of the light guiding pipe is attached with a layer of golden ultramicron film; the extreme end of the light guiding path of the light guiding pipe is provided with an infrared sensor. As only infrared ray released by the inner ear of a human body which is relatively parallel to the infrared sensor can inject directly, and inclined infrared ray can be absorbed by the golden ultramicron film on the inner wall of the light guiding pipe, so good temperature measuring accuracy is achieved.

Description

The probe of infra-red thermometer

The utility model is relevant for a kind of probe structure of infrared thermometer.

Infrared thermometer is a kind of medical measurer that can record patient temperature rapidly.Because medical circle early knows the inner ear temperature near human body temperature, therefore can effectively show the temperature of human body by the infrared ray that human body eardrum and adjacent tissue pass out.So record the infrared ray that human body is sent with infrared sensor, and, express body temperature, the people is read easily with digital form through circuit conversion.More traditional clinical thermometer, infrared thermometer have quick measurement and the characteristics that are easy to read temperature value.Existing many at present hospital clinic adopt.Yet, present existing infrared thermometer, big and photoconductive tube itself is according to the relation of material and structure and the influence of contact environment because of complicated volume on its probe design, and produces the infrared rays of different amounts and then the whole degree of accuracy of measuring of influence.As No. 144981 " probe of infrared thermometer constitutes " patented claim of TaiWan, China, the structure fabrication complexity is promptly arranged, the big noise of volume is many, carries difficult shortcoming.See also shown in Figure 1, because of its infrared sensor 17 near probe mouth place, make the oblique angle that enters of oblique wave (clutter) big, and easily make this infrared sensor 17 receive incorrect signals and influence temperature.Moreover its probe 18 is a cone, isolates and the contacting of infrared sensor 17 though it is provided with ring chamber cave 19 in inside.But this probe 18 still has the phenomenon of induction body temperature or environment temperature and causes temperature survey inaccurate.Be the shortcoming of case before the more detailed explanation, now with sketch explanation as after.See also Fig. 2.It is the sketch of key diagram 1 shortcoming.As shown in Figure 2: the photoconductive tube 20 of probe 18 inside of this preceding case is shorter, very easily makes oblique wave inject the refraction wave that is produced and influences the accuracy of infrared sensor 17 sensings.And peripheral temperature is sent the infrared ray that equals body temperature with non-by probe 18 conduction own, therefore should preceding case have degree of accuracy not enough in the measurement of temperature, and make complexity, the big noise of volume be many, carry the shortcoming of inconvenience, so this shortcoming is the purpose of inventor institute desire improvement.

Therefore: the purpose of this utility model is to provide a kind of probe that can improve the infrared thermometer measurement accuracy.

Design of the present utility model, infrared sensor is moved toward in, make the same temperature of cold junction and circuit board, can absorb the oblique infrared ray of injecting by golden ultrafine particle film, therefore the sensing that makes infrared sensor can obtain preferable accuracy only to the infrared induction of direct projection in parallel on thermometric.

The probe of infrared thermometer of the present utility model, comprise housing, be positioned at the photoconductive tube of described housing and at the infrared sensor of described photoconductive tube path least significant end, it is characterized in that described photoconductive tube is the funnel-form metallic object, on described photoconductive tube inwall, adhere to one deck gold ultrafine particle film.

For understanding the purpose of this utility model, feature and effect, now by following specific embodiment, and conjunction with figs., the utility model is described in detail, illustrate as the back:

Fig. 1 is the structure cutaway view of conventional probe.

Fig. 2 is the explanation sketch of Fig. 1.

Fig. 3 is the utility model outward appearance floor map.

Fig. 4 is this probe structure cut-open view.

Fig. 5 is the explanation sketch of Fig. 4.

Fig. 6 is that golden ultrafine particle film transmittance closes curve synoptic diagram.

See also Fig. 3, Fig. 3 is the utility model outward appearance floor map.As shown in Figure 3: the utility model include one can ccontaining temperature conversion circuit penholder body 8 and the probe 1 of front end, constitute outer body, wherein the ccontaining electronic circuit of 8 energy of this penholder body is enforceable circuit (traditional circuit).Now do not give unnecessary details in detail.This penholder body 8 is provided with a display 2, a button 3 and power switch 4, in order to cooperate with aforesaid circuit, shows and digital maintenance with the numeral that opens and closes control, temperature value as circuit.

See also Fig. 4.Fig. 4 is the utility model probe structure cut-open view.As shown in the figure: this part is the improved emphasis of the utility model, the shell 12 of this probe 1 is a plastic material, it can avoid heat conduction (being space 9) with contacting in heat insulation mode of this photoconductive tube 16, because the effect in space can be blocked shell and conduct to photoconductive tube because of the heat that contacts duct, this is a heat-blocking action.This photoconductive tube 16 also become a funnelform metal solid (but material with the metal of plated film all can), this photoconductive tube 16 has long leaded light path, on inner tubal wall, be attached with one deck gold ultrafine particle film 15, the most last just relative with an infrared sensor 10 that surrounded by metal level 7 in these photoconductive tube 16 paths, infrared ray can be injected via the through hole 11 of this metal level 7.In addition, in these photoconductive tube 16 front ends and this shell 12 anterior appropriate locations, be provided with a dustproof diaphragm 14, should dustproof diaphragm 14 can prevent that the dirt thing from entering in the path of photoconductive tube 16 covers the infrared ray of injecting, avoid photoconductive tube ineffective, and can do suitably cleaning from outside dirt thing by cleanout tool or alcohol to these dustproof diaphragm 14 outside facial masks.The infrared ray that is disengaged when the human body inner ear; can directly inject when being relative level with this infrared sensor 10; can absorb (as shown in Figure 5) by the golden ultrafine particle film 15 of photoconductive tube 16 inside pipe walls for oblique infrared ray; this photoconductive tube 16 is that the metal solid thermal conduction rate is more slow again, and this infrared sensor 10 has metal level 7 to surround protection.Therefore the sensing of this infrared sensor 10 only to the infrared induction of direct projection in parallel, therefore can obtain preferable accuracy on thermometric.

See also Fig. 6, Fig. 6 is golden ultrafine particle film transmittance relation curve synoptic diagram.This graph of a relation is taken from ultramicron material technology one book, wherein the ultrafine metal particle of classes such as gold is formed film, suitably control the adhesion amount of unit area, be regardless of air pressure, evaporation source temperature, adhere to conditions such as time making, can get transmittance necessarily, phase shape reflected light is more little, and this ultra micron reaches 500g/cm when above with film, can get 90% big absorptivity.And that the characteristic of golden ultrafine particle film is an absorptivity is big, and the absorptivity wavelength interdependence from visual to the infrared light field is few.

Brought forward is described, and the utility model has improvement really with creative, and the probe of more preceding case has higher accuracy, proposes utility application in accordance with the law.

Claims

1. the probe of an infrared thermometer, comprise housing, be positioned at the photoconductive tube of described housing and at the infrared sensor of described photoconductive tube path least significant end, it is characterized in that described photoconductive tube is the funnel-form metallic object, on described photoconductive tube inwall, adhere to one deck gold ultrafine particle film.

2. probe as claimed in claim 1 is characterized in that, described photoconductive tube front end is provided with a dustproof diaphragm in described shell front portion.