CN201505128U - Medical Grade Infrared Thermometer - Google Patents

Abstract

The utility model relates to a medical-grade infrared thermometer, which comprises sequentially connected optical devices, photoelectric detectors, signal amplifiers, and signal processors, one output end of the signal processor is connected to a display, and the other of the signal processor The two output ends are connected to the first laser generator and the second laser generator that emit light beams at a converging angle. The utility model provides a medical-grade infrared thermometer capable of providing accurate distance reference standards, more accurate measurement results, and more convenient use by operators.

Description

Medical Grade Infrared Thermometer

technical field

The utility model relates to medical equipment, in particular to an infrared thermometer.

Background technique

Infrared temperature measurement technology has been widely used in the industrial field due to its non-contact characteristics, and it has been widely used in human body temperature measurement in recent years. Existing infrared thermometers are of various varieties, with similar functions, and the structural components are composed of optical system, photoelectric detector, signal amplifier, signal processing, display output and other parts.

The difference between normal human body temperature and abnormal human body temperature is only a few degrees. Infrared thermometers used for human body temperature measurement have certain requirements for accuracy, and ordinary infrared thermometers used for industrial measurement cannot meet the requirements. As a result, a higher-precision infrared thermometer specially used to measure human body temperature has been produced.

Since the distance has a direct impact on the test results, the operator is required to ensure that the patient's accurate body temperature can be tested at the optimal distance prescription, otherwise, the test result data will have different degrees of artificial deviation, resulting in false clinical data and misleading clinical diagnosis. result. At present, the infrared thermometers used for human body temperature measurement require the operator to keep a certain distance during the test, but there is no reference or test method for the distance. Indicates the site to be tested, not the distance to be tested. In view of this, how to provide an accurate distance reference for the operator, reduce the requirements for the operator, and overcome the false measurement results caused by the distance deviation are problems to be solved.

Contents of the invention

In order to solve the problems that the existing infrared thermometers cannot provide accurate distance reference, there are false measurement results caused by distance deviation, and the operator is not convenient to use, the utility model provides an accurate distance reference, measurement The result is more accurate and the operator is more convenient to use the medical grade infrared thermometer.

The utility model adopts the following technical solutions:

Medical-grade infrared thermometer, including sequentially connected optical devices, photodetectors, signal amplifiers, and signal processors, one output end of the signal processor is connected to the display, and the other two output ends of the signal processor are connected to the transmitter A first laser generator and a second laser generator whose light beams form a converging angle.

Further, the first laser generator and the second laser generator are placed at an angle.

The technical idea of the utility model is: connect two laser generators whose emitting light beams form a converging angle at the output end of the signal processor, and the converging point of the emitting light beams indicates the best test distance. In this way, as long as the operator moves the infrared thermometer with his hand, when the light spots projected by the two emitted beams on the human body overlap, it indicates the optimal detection distance required by the device, and at the same time, the light spot also indicates the test site. . In this way, since an accurate distance reference is provided, the operator is more convenient to use.

The working principle is as follows: the optical device concentrates the infrared rays radiated from the measured part to the receiving window of the photodetector of the detection element, and limits the infrared rays entering the instrument within a fixed range; the photodetector converts the received infrared signals into electrical signals , the input signal amplifier; the signal amplifier amplifies the input electrical signal, and after obtaining the electrical signal that the signal processor can identify and process, the input signal processor analyzes and processes the signal; the signal processor analyzes the input electrical signal, process, get the final temperature data, and send it to the display for display; at the same time, the signal processor controls the first laser generator and the second laser generator to issue the best distance indicating light before the test, guiding the operator to control the test distance at the minimum. Good condition and test site.

The beneficial effects of the utility model are: it can provide an accurate distance reference, the temperature measurement result is more accurate, and the operator is more convenient to use.

Description of drawings

Fig. 1 is a structural block diagram of the utility model.

Fig. 2 is a working principle diagram of the first laser generator and the second laser generator.

Detailed ways

Referring to Figure 1-2: a medical-grade infrared thermometer, including an optical device, a photodetector, a signal amplifier, and a signal processor connected in sequence, one output end of the signal processor is connected to a display, and the other end of the signal processor The two output ends are connected to the first laser generator 1 and the second laser generator 2 that emit light beams at a converging angle.

The first laser generator 1 and the second laser generator 2 described in this embodiment are placed at an angle to generate two emission beams at a converging angle.

In this embodiment, the output end of the signal processor is connected to two laser generators whose emission beams form a converging angle, and the confluence of the emission beams indicates the optimal test distance. In this way, as long as the operator moves the infrared thermometer with his hand, when the light spots projected on the surface 3 of the measured body coincide by the two emitted beams, it indicates the optimal detection distance required by the device, and at the same time, the light spot also indicates the test site. In this way, since an accurate distance reference is provided, the operator is more convenient to use.

The working principle of this device is as follows: the optical device concentrates the infrared rays radiated from the measured part to the receiving window of the photodetector of the detection element, and limits the infrared rays entering the instrument within a fixed range; the photodetector converts the received infrared signals to The input signal amplifier is an electrical signal; the signal amplifier amplifies the input electrical signal, and after obtaining the electrical signal that the signal processor can identify and process, the input signal processor analyzes and processes the signal; the signal processor amplifies the input electrical signal Analyze and process to obtain the final temperature data, and send it to the display for display; at the same time, the signal processor controls the first laser generator 1 and the second laser generator 2 to issue the best distance indicating light before the test, guiding the operator to place The test distance is controlled in the best state and the test site.

The measurement results of infrared thermometers are affected by many factors, the main one is the uncertainty of the emissivity of the measured object, and it is not easy to measure the actual temperature of the measured object; The fixed setting is 0.95, and the emissivity of the human body is generally between 0.93 and 0.96 due to individual differences. Therefore, the method of fixing the emissivity fundamentally causes deviations in the measurement results. In order to overcome the influence of emissivity differences caused by individual differences on the measurement results, this embodiment adopts the multi-radiance average algorithm, that is, first assigns the emissivity within the infrared radiation range of the human body to the detection results to obtain multiple results, and then A plurality of results are averaged to finally give a measurement result, and the accuracy of the result is better than that of the existing infrared thermometer for human body.

Claims (2)

1. medical grade infrared radiation thermometer, comprise the Optical devices, photodetector, signal amplifier, the signal processor that are linked in sequence, an outfan of described signal processor connects display, it is characterized in that: two outfans in addition of described signal processor connect first laser generator and second laser generator that the emission light beam becomes to converge angle.

2. medical grade infrared radiation thermometer as claimed in claim 1 is characterized in that: described first laser generator becomes angle to place with second laser generator.

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