CN211651850U

CN211651850U - Double-infrared forehead temperature gun

Info

Publication number: CN211651850U
Application number: CN202020551051.4U
Authority: CN
Inventors: 冯涛
Original assignee: Shenzhen Zhongtaihui Technology Co ltd
Current assignee: Shenzhen Zhongtaihui Technology Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-10-09
Anticipated expiration: 2030-04-15

Abstract

The utility model belongs to the technical field of medical appliances technique and specifically relates to a double infrared forehead temperature gun, a first infrared component for measuring forehead temperature, and a second infrared component for measuring forehead distance, the second infrared component comprises an infrared transmitting circuit and an infrared receiving circuit which are connected with a singlechip, and a battery BAT for providing power for the infrared transmitting circuit and the infrared receiving circuit, the infrared transmitting circuit comprises a first infrared tube D1, the infrared receiving circuit comprises a second infrared tube D2 and a first triode Q1, the singlechip is also connected with an external discharge circuit, the external discharge circuit comprises a first amplifier U1, a second triode Q2 and a loudspeaker LS, one group of forehead temperature measurement and another group of forehead distance measurement are realized by arranging two groups of infrared components on the forehead temperature gun, thereby the distance between the handheld forehead temperature gun and the forehead can be measured in an auxiliary manner, the standard of measuring distance is reached, and voice prompt is realized, the accuracy of measuring forehead temperature is guaranteed.

Description

Double-infrared forehead temperature gun

Technical Field

The utility model belongs to the technical field of medical appliances, especially, relate to a double infrared forehead temperature rifle.

Background

The infrared forehead temperature rifle of hand-held type can realize that the non-contact closely measures the human body temperature, under the special circumstances, in order to avoid direct contact human body, prevents cross infection, all needs to use the infrared forehead temperature rifle of hand-held type in many places. The infrared forehead temperature gun is also called as an infrared thermometer, and can accurately measure the temperature of a human body within 1 second. When in use, the probe is only required to be aligned to the forehead, and the button is pressed. The working principle is really simple: when the temperature of the object is higher than "zero", i.e., -273 ℃, the object radiates infrared rays to the outside. The infrared ray probe is used to obtain the infrared ray intensity of different objects, and the temperature data can be displayed on the liquid crystal display through the amplifying circuit and the analog-to-digital conversion circuit.

However, the measurement accuracy of the infrared forehead temperature gun is easily affected by external factors, the external factors mainly comprise two points, one point is temperature, and if the outdoor weather is cold, the temperature measured by the temperature measuring instrument has no reference and is abnormal; the other point is that the forehead distance is measured, if air, water vapor and other shelters in the measuring environment change the radiation curve of an object, so that the temperature measurement is inaccurate, so that when the body temperature is measured, an infrared forehead thermometer is required to be pointed to the upper part of the center of the forehead and the eyebrow center and kept vertical, the distance between a product and the forehead is about 3cm-5cm, otherwise, the measured forehead temperature is not accurate enough, and general measuring personnel can hardly guarantee that the measured distance is within 3cm-5cm, so that errors are caused.

SUMMERY OF THE UTILITY MODEL

When measuring the volume temperature for overcoming among the prior art, infrared volume temperature rifle is not up to standard because handheld distance, and the problem of error appears in the measurement volume temperature that causes, the utility model provides a volume temperature rifle that can the auxiliary measurement volume apart from when measuring the volume temperature avoids by the influence that external factor volume apart from causing, is realized through following scheme:

a double-infrared forehead temperature gun comprises a first infrared assembly used for measuring forehead temperature and a second infrared assembly used for measuring forehead distance, wherein the second infrared assembly comprises an infrared transmitting circuit and an infrared receiving circuit which are connected with a single chip microcomputer, and a battery BAT which provides power for the infrared transmitting circuit and the infrared receiving circuit, the infrared transmitting circuit comprises a first infrared tube D1, the infrared receiving circuit comprises a second infrared tube D2 and a first triode Q1, the battery BAT is connected with the anode of the first infrared tube D1 through a key SW and a first resistor R1 in sequence, the cathode of the first infrared tube D1 is directly grounded, and an infrared transmitting signal connected to the single chip microcomputer is led out between the first resistor R1 and the first infrared tube D1; the base electrode of the first triode Q1 is connected with the cathode of the second infrared tube D2, the collector electrode of the first triode Q1 is connected with the anode of the second infrared tube D2 and then connected with the battery BAT, and the emitter electrode of the first triode Q1 is led out through the filter circuit to be connected with the infrared receiving signal of the single chip microcomputer.

As the utility model relates to a further improvement of two infrared forehead temperature guns, outer discharge circuit is still connected to the singlechip, outer discharge circuit includes first amplifier U1, thyristor and speaker LS, and the singlechip sends audio output signal and sends by speaker LS through thyristor and first amplifier U1 in proper order.

As a further improvement of the dual infrared forehead temperature gun of the utility model, the thyristor adopts a second triode Q2, the model of a first amplifier U1 is LM386, the base of the second triode Q2 is connected with the singlechip to send out audio output signals, the collector of the second triode Q2 is connected with the battery BAT, one path of the emitter of the second triode Q2 is connected with the No. 6 pin of the first amplifier U1, the other path is grounded through a second resistor R2, a third capacitor C3 and a sliding resistor RV in sequence, the slip sheet of the sliding resistor RV is connected with the No. 3 pin of the first amplifier U1, the No. 2 pin and the No. 4 pin of the first amplifier U1 are grounded after short circuit, the No. 7 pin of the first amplifier U1 is grounded through a sixth capacitor C6, a fourth capacitor C4 is connected between the No. 1 pin and the No. 8 pin of the first amplifier U1, the No. 5 pin of the first amplifier U1 is connected with one end of the loudspeaker LS through a fifth capacitor C5, the other end of the loudspeaker LS is connected to ground.

As the utility model relates to a further improvement of two infrared forehead temperature guns, filter circuit adopts pi type filter circuit, and this pi type filter circuit includes first inductance L1 and connects in first inductance L1 front end and grounded first electric capacity C1 and connect in first inductance L1 rear end and grounded second electric capacity C2, and the projecting pole of first triode Q1 draws forth the infrared received signal of access singlechip through first inductance L1.

The utility model discloses a beneficial effect of two infrared forehead temperature guns: through set up two sets of infrared subassemblies on the forehead temperature rifle, a set of volume temperature of measuring, another group measures the volume apart from to can reach the standard of measuring distance through the distance of handheld forehead temperature rifle of auxiliary measurement and forehead when measuring the volume temperature, guarantee to measure the degree of accuracy of volume temperature.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a block diagram of a second novel infrared assembly of the present implementation;

FIG. 3 is a circuit diagram of a second novel infrared assembly of the present implementation;

FIG. 4 is a circuit diagram of the novel external discharge circuit of the present implementation;

in the figure: 1. the infrared transmitter comprises a first infrared component, a second infrared component, a first infrared transmitting circuit, a second infrared receiving circuit, a.

Detailed Description

The present invention will be further described with reference to the following examples, which are only part of the present invention, and these examples are only used to explain the present invention, and do not constitute any limitation to the scope of the present invention.

As shown in the figure, a double infrared forehead temperature gun is provided with a first infrared assembly 1 for measuring forehead temperature and a second infrared assembly 2 for measuring forehead distance, wherein the principle of measuring forehead temperature through the first infrared assembly 1 is well known to those skilled in the art and is not described in detail herein, and the measurement of forehead distance by the second infrared assembly 2 is because the cost of using a laser radar for distance measurement is too high, such as vehicle-mounted radar (ultrasonic technology) distance measurement is very accurate and expensive. But carry out the range finding through infrared transmitting, receiving arrangement and combination singlechip, though the precision is not as good as ultrasonic wave technique, but is enough to the forehead temperature rifle, low cost easily promotes.

In the embodiment, the second infrared assembly 2 includes an infrared transmitting circuit 201 and an infrared receiving circuit 202 connected to the single chip microcomputer, and a battery BAT for supplying power to the infrared transmitting circuit 201 and the infrared receiving circuit 202, the second infrared transmitting circuit 201 includes a first infrared tube D1, the infrared receiving circuit 202 includes a second infrared tube D2 and a first triode Q1, the battery BAT is connected to the anode of the first infrared tube D1 through a key SW and a first resistor R1 in sequence, the cathode of the first infrared tube D1 is grounded, and an infrared transmitting signal connected to the single chip microcomputer is led out between the first resistor R1 and the first infrared tube D1; the base electrode of the first triode Q1 is connected with the cathode of the second infrared tube D2, the collector electrode of the first triode Q1 is connected with the anode of the second infrared tube D2 and then connected with the battery BAT, and the emitter electrode of the first triode Q1 leads out an infrared receiving signal connected with the single chip microcomputer through the filter circuit; the filter circuit adopts a pi-type filter circuit, the pi-type filter circuit comprises a first inductor L1, a first capacitor C1 which is connected to the front end of the first inductor L1 and is grounded, and a second capacitor C2 which is connected to the rear end of the first inductor L1 and is grounded, and an emitting electrode of the first triode Q1 is led out through the first inductor L1 to be connected into an infrared receiving signal of the single chip microcomputer.

The key SW is pressed down, the first infrared tube D1 is conducted, the single chip microcomputer receives a signal of working of the first infrared tube D1, the first infrared tube D1 emits an infrared signal with specific frequency to the forehead, the infrared signal is reflected by the forehead and then received by the second infrared tube D2, the second infrared tube D2 is conducted, the first triode Q1 is conducted, the single chip microcomputer receives a signal of working of the second infrared tube D2, the distance between the forehead and the temperature gun at the moment can be calculated by the single chip microcomputer through the time difference between the received working signal of the first infrared tube D1 and the received working signal of the second infrared tube D2, and a calculation program inside the single chip microcomputer is not specifically described here.

Further, the single chip microcomputer is also connected with an external discharge circuit 3, the external discharge circuit 3 comprises a second triode Q2, a first amplifier U1 with the model number LM386 and a loudspeaker LS, wherein pins No. 1 and No. 8 of the first amplifier U1 are gain control pins, pins No. 2 and No. 3 are input pins, pins No. 4 and No. 6 are power supply pins, pin No. 5 is an output pin, pin No. 7 is a bypass pin, concretely, the base electrode of the second triode Q2 is connected with the single chip microcomputer to send out an audio output signal, the collector electrode of the second triode Q2 is connected with a battery BAT, one path of the emitter electrode of the second triode Q2 is connected with pin No. 6 of the first amplifier U1, the other path is grounded through a second resistor R2, a third capacitor C3 and a sliding resistor RV in sequence, the sliding vane of the sliding resistor RV is connected with pin No. 3 of the first amplifier U1, the pin No. 2 and the pin No. 4 of the first amplifier U1 are grounded after being short, pin No. 7 of the first amplifier U1 is grounded via a sixth capacitor C6, a fourth capacitor C4 is connected between pin No. 1 and pin No. 8 of the first amplifier U1, pin No. 5 of the first amplifier U1 is connected to one end of the speaker LS via a fifth capacitor C5, and the other end of the speaker LS is grounded.

When the forehead distance calculated by the single chip microcomputer meets the standard of measuring forehead temperature of the first infrared assembly 1 within 3cm-5cm, the single chip microcomputer sends a high-level audio output signal, the second triode Q2 is conducted, the audio output signal is amplified by the first amplifier U1 and then sent out by the loudspeaker LS, at the moment, the fact that the proper distance between the ear thermometer and the forehead is reached is determined, and the forehead temperature is measured accurately; wherein the sound level of the loudspeaker LS is adjusted by adjusting the slide of the slide resistor RV. When the forehead distance calculated by the single chip microcomputer is not within 3cm-5cm and does not meet the forehead temperature measuring standard of the first infrared assembly, the single chip microcomputer sends a low-level audio output signal, the second triode Q2 is not conducted, the first amplifier U1 does not work, the loudspeaker LS does not sound, the fact that the proper distance between the ear thermometer and the forehead is not reached at the moment is shown, the forehead temperature measurement is not accurate enough, and the position of the ear thermometer needs to be adjusted again.

The phenomenon that the measurement forehead temperature of the first group of infrared assemblies 1 is inaccurate due to external factors (measurement distance) can be well avoided through the second group of infrared assemblies 2.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. The utility model provides a two infrared forehead temperature guns which characterized in that: the device comprises a first infrared component for measuring the forehead temperature and a second infrared component for measuring the forehead distance, wherein the second infrared component comprises an infrared transmitting circuit and an infrared receiving circuit which are connected with a single chip microcomputer, and a battery BAT for providing power for the infrared transmitting circuit and the infrared receiving circuit, the infrared transmitting circuit comprises a first infrared tube D1, the infrared receiving circuit comprises a second infrared tube D2 and a first triode Q1, the battery BAT is connected with the anode of the first infrared tube D1 through a key SW and a first resistor R1 in sequence, the cathode of the first infrared tube D1 is grounded, and an infrared transmitting signal connected to the single chip microcomputer is led out between the first resistor R1 and the first infrared tube D1; the base electrode of the first triode Q1 is connected with the cathode of the second infrared tube D2, the collector electrode of the first triode Q1 is connected with the anode of the second infrared tube D2 and then connected with the battery BAT, and the emitter electrode of the first triode Q1 is led out through the filter circuit to be connected with the infrared receiving signal of the single chip microcomputer.

2. The dual infrared forehead temperature gun according to claim 1, wherein: the single chip microcomputer is further connected with an external discharge circuit, the external discharge circuit comprises a first amplifier U1, a thyristor and a loudspeaker LS, and audio output signals sent by the single chip microcomputer are sequentially sent out by the loudspeaker LS through the thyristor and the first amplifier U1.

3. The dual infrared forehead temperature gun according to claim 2, wherein: the thyristor adopts a second triode Q2, the model of a first amplifier U1 is LM386, the base of a second triode Q2 is connected with the single chip microcomputer to send out an audio output signal, the collector of the second triode Q2 is connected with the battery BAT, one path of the emitter of the second triode Q2 is connected with the No. 6 pin of the first amplifier U1, the other path of the emitter is grounded through a second resistor R2, a third capacitor C3 and a sliding resistor RV in sequence, the sliding sheet of the sliding resistor RV is connected with the No. 3 pin of the first amplifier U1, the No. 2 pin and the No. 4 pin of the first amplifier U1 are grounded after being short-circuited, the No. 7 pin of the first amplifier U1 is grounded through a sixth capacitor C6, a fourth capacitor C4 is connected between the No. 1 pin and the No. 8 pin of the first amplifier U1, the No. 5 pin of the first amplifier U1 is connected with one end of the loudspeaker LS through a fifth capacitor C5, and the.

4. The dual infrared forehead temperature gun according to any one of claims 1-3, wherein: the filter circuit adopts a pi-type filter circuit, the pi-type filter circuit comprises a first inductor L1, a first capacitor C1 which is connected to the front end of the first inductor L1 and is grounded, and a second capacitor C2 which is connected to the rear end of the first inductor L1 and is grounded, and an emitting electrode of a first triode Q1 is led out through a first inductor L1 to be connected into an infrared receiving signal of the single chip microcomputer.