CN213985404U

CN213985404U - Infrared thermometer with ear temperature and forehead temperature prompting by adopting two sound volumes

Info

Publication number: CN213985404U
Application number: CN202023006558.0U
Authority: CN
Inventors: 曹亮
Original assignee: Famidoc Technology Co ltd
Current assignee: Famidoc Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-17
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses an infrared thermometer with two volume prompts for ear temperature and forehead temperature. Including main control chip, the thermistor circuit, the thermopile circuit, power supply circuit, the function button, the pilot lamp is shaded, LCD display screen and bee calling organ, power supply circuit installs the battery and is connected with main control chip, main control chip respectively with the thermopile circuit, the thermistor circuit, the function button, pilot lamp and LCD display screen are shaded and are connected, main control chip is provided with two PWM outputs, two PWM outputs are connected with the input of bee calling organ through first resistance and second resistance respectively, the resistance value of first resistance is less than the resistance value of second resistance. The utility model discloses when not operating simultaneously to the gentle volume temperature of ear, change the sound size of bee calling organ, satisfy different operations down, the nimble switching of bee calling organ sound avoids sound too big or undersize, provides more comfortable temperature measurement for the user and experiences.

Description

Infrared thermometer with ear temperature and forehead temperature prompting by adopting two sound volumes

Technical Field

The utility model belongs to the technical field of electronic clinical thermometer technique and specifically relates to an infrared clinical thermometer that ear temperature and volume temperature adopted two kinds of volume suggestion.

Background

As is known to all, in daily life, in order to know whether the body temperature is abnormal or not in time, thermometers are prepared, and infrared thermometers are widely and conveniently used. Infrared thermometers operate on the principle of focusing infrared thermal radiation from the body onto a detector that converts the radiation power into an electrical signal that can be displayed in degrees celsius (or fahrenheit) after being compensated for ambient temperature and provides an audible indication of the time of detection.

At present, the infrared thermometers on the market generally integrate ear temperature and forehead temperature into one, and use a buzzer at the same time. However, when the forehead temperature is measured, the operation is far ear operation, so the sound of the buzzer needs to be satisfied that the sound can be heard by human ears, when the ear temperature is detected, the operation is near ear operation, at this time, the sound calibration of the buzzer is harsh, so that the requirements on the sound volume of the buzzer and the sound calibration of the buzzer are different, and the flexible allocation of the sound during two detection works cannot be flexibly satisfied.

Disclosure of Invention

To the not enough of existence among the above-mentioned prior art, the utility model aims to provide an infrared clinical thermometer that ear temperature and volume temperature adopted two kinds of volume suggestions.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an ear temperature and volume temperature adopt infrared clinical thermometer of two kinds of volume suggestions, includes main control chip, thermistor circuit, thermopile circuit, power supply circuit, function button, pilot lamp, LCD display screen and bee calling organ in a poor light, power supply circuit installs the battery and is connected with main control chip, main control chip is connected with thermopile circuit, thermistor circuit, function button, pilot lamp and LCD display screen in a poor light respectively, main control chip is provided with two PWM outputs, two the PWM output is connected with the input of bee calling organ through first resistance and second resistance respectively, the resistance value of first resistance is less than the resistance value of second resistance.

Preferably, the main control chip is an XWIC009 single chip microcomputer, and an 18 terminal pin and a 17 terminal pin of the main control chip are respectively connected with the first resistor and the second resistor.

Preferably, the power supply circuit includes a power supply and a fuse, and one end of the fuse is connected to the power supply and the other end of the fuse outputs power and is grounded through a first diode, a first capacitor and a second capacitor.

Preferably, the thermopile circuit includes a thermopile, an anode of the thermopile is connected to an ACM terminal pin of the main control chip through an eighth resistor, and a cathode of the thermopile is connected to an AIP terminal pin of the main control chip and to an eighth resistor through an eighth capacitor.

Preferably, the thermistor circuit comprises a thermistor, one end of the thermistor is grounded through a fourth resistor and is connected with an AIR terminal pin of the main control chip, the other end of the thermistor is connected with an AIR terminal pin of the main control chip and is connected with an ACM terminal pin of the main control chip through a third resistor, and the fourth resistor is connected with a ninth capacitor in parallel.

Since the technical scheme is used, the utility model discloses it is different to operate warm to ear temperature and volume temperature, changes the sound size of bee calling organ, satisfies different operations down, and the nimble switching of bee calling organ sound avoids sound too big or undersize, provides more comfortable temperature measurement for the user and experiences.

Drawings

Fig. 1 is a schematic diagram of the structural principle of the embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of the main control chip according to an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a power supply circuit according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a thermopile circuit according to an embodiment of the present invention.

Fig. 5 is a schematic circuit diagram of a thermistor circuit according to an embodiment of the present invention.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 to 5, the infrared thermometer provided by this embodiment for prompting ear temperature and forehead temperature with two volume levels includes a main control chip 1, a thermistor circuit 2, a thermopile circuit 3, a power supply circuit 4, a function key 5, a backlight indicator 6, an LCD display 7 and a buzzer 8, the power supply circuit 4 is provided with a battery and is connected with the main control chip 1, the main control chip 1 is respectively connected with the thermopile circuit 3, the thermistor circuit 2, the function key 5, the backlight indicator 6 and the LCD display 7, the main control chip 1 is provided with two PWM output ends, the two PWM output ends are respectively connected with an input end of the buzzer 8 through a first resistor R1 and a second resistor R2, and a resistance value of the first resistor R1 is smaller than a resistance value of the second resistor R2.

Further, the main control chip 1 is an XWIC009 single chip, the circuit structure is shown in fig. 2, and the terminal pin 18 and the terminal pin 17 of the main control chip 1 are respectively connected to the first resistor R1 and the second resistor R2.

Further, the circuit structure of the power circuit 4 is as shown in fig. 3, that is, the power circuit includes a power supply and a fuse F1, one end of the fuse F1 is connected to the power supply BAT, and the other end of the fuse F1 is connected to an output power and is grounded through a first diode D1, a first capacitor C1 and a second capacitor C2.

Further, the circuit structure of the thermopile circuit 3 is as shown in fig. 4, that is, the circuit structure includes a thermopile IR1A, the positive electrode of the thermopile IR1A is connected to the ACM terminal pin of the main control chip 1 through an eighth resistor R8, and the negative electrode of the thermopile IR1A is connected to the AIP terminal pin of the main control chip 1 and is connected to an eighth resistor R8 through an eighth capacitor C8.

Further, the circuit structure of the thermistor circuit 2 is as shown in fig. 5, that is, the thermistor circuit includes a thermistor IR1B, one end of the thermistor IR1B is grounded through a fourth resistor R4 and connected to the AIR terminal pin of the main control chip 1, the other end of the thermistor IR1B is connected to the AIR terminal pin of the main control chip 1 and connected to the ACM terminal pin of the main control chip 1 through a third resistor R3, and a ninth capacitor C9 is connected in parallel to the fourth resistor R4.

To facilitate the more clear examination by the examiner, the following description is made:

according to the blackbody radiation law, all objects higher than absolute zero in nature continuously radiate energy, the magnitude and the distribution of the energy radiated outwards according to the wavelength of the object are closely related to the surface temperature of the object, and the higher the temperature of the object is, the stronger the infrared radiation capability is.

Meanwhile, the infrared thermometer obtains infrared radiation emitted by the body surface or eardrum through the thermopile (namely, an infrared receiving sensor), and the infrared thermometer is matched with the thermistor to measure the temperature of the thermopile and an internal algorithm of the thermometer to calculate and correct the temperature difference, so that the accurate body temperature is finally obtained.

When the specific sound size is regulated and controlled, the function keys 5 (the function keys 5 comprise a power switch, an ear temperature measuring key, a forehead temperature measuring key and the like) connected with the main control chip 1 are used for selecting the measurement of the ear temperature or the forehead temperature, when the main control chip detects that the ear temperature mode is used, the main control chip 1 sets the 18 terminal pins PWM1 of the main control chip 1 as a high-resistance input port, the influence on the 17 terminal pins PWM2 is avoided, the 17 terminal pins PWM2 are used as an output port, PWM pulses are output to drive the buzzer, the resistance value of the second resistor R2 of the loop current limiting resistor is larger than that of the first resistor R1, the driving current is smaller, and therefore, the sound of the buzzer 8 is small.

When detecting to use the forehead temperature mode, set 17 end pin PWM2 as the high resistance input port, avoid causing the influence to 18 end pin PWM1, regard 18 end pin PWM1 as the delivery outlet, output PWM pulse drive bee calling organ 8, because of the resistance value of first resistance R1 is less than second resistance R2, consequently driving current is great, bee calling organ 8 sound is also great, thereby, alright realize the regulation to bee calling organ sound size according to ear temperature detection or forehead temperature detection with the satisfaction, make the user use under two kinds of modes, it is more comfortable.

In addition, the sound intensity of the buzzer 8 can also be adjusted through the duty ratio adjustment of the main control chip 1, the buzzer is connected by using a single resistor, and the PWM duty ratio output of the main control chip 1 is used. Specifically, when the main control chip 1 detects that the ear temperature mode is used, the duty ratio of the PWM high level is adjusted to be low, the effective voltage output by the PWM is reduced, the ear temperature PWM is seen, the driving capability of the PWM is weakened, and therefore the sound of the buzzer 8 is small.

When the main control chip 1 detects that the rated temperature mode is used, the duty ratio of the PWM high level is adjusted to be high, the effective voltage output by the PWM is increased, the driving capability of the PWM is enhanced according to the rated temperature PWM, and therefore the buzzer 8 has loud sound.

Since the output frequencies of the two are consistent, the ear temperature is 1/4 and the forehead temperature is 1/2 in the duty ratio, so that the sound quality is not different and the sound volume is obviously different.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides an infrared clinical thermometer that ear temperature and forehead temperature adopted two kinds of volume suggestions which characterized in that: including main control chip, thermistor circuit, thermopile circuit, power supply circuit, function button, pilot lamp, LCD display screen and bee calling organ in a poor light, power supply circuit installs the battery and is connected with main control chip, main control chip is connected with thermopile circuit, thermistor circuit, function button, pilot lamp and LCD display screen in a poor light respectively, main control chip is provided with two PWM outputs, two the PWM output is connected with the input of bee calling organ through first resistance and second resistance respectively, the resistance value of first resistance is less than the resistance value of second resistance.

2. The infrared thermometer of claim 1, wherein the ear temperature and the forehead temperature are indicated by two volumes: the main control chip is an XWIC009 single chip microcomputer, and 18 terminal pins and 17 terminal pins of the main control chip are respectively connected with the first resistor and the second resistor.

3. The infrared thermometer of claim 2, wherein the ear temperature and the forehead temperature are indicated by two volumes: the power supply circuit comprises a power supply and a fuse, wherein one end of the fuse is connected with the other end of the power supply and outputs power to the ground through a first diode, a first capacitor and a second capacitor.

4. The infrared thermometer of claim 3, wherein the ear temperature and the forehead temperature are indicated by two volumes: the thermopile circuit comprises a thermopile, the anode of the thermopile is connected with the ACM terminal pin of the main control chip through an eighth resistor, and the cathode of the thermopile is connected with the AIP terminal pin of the main control chip and is connected with an eighth resistor through an eighth capacitor.

5. The infrared thermometer with two volume indications for ear temperature and forehead temperature as claimed in claim 4, wherein: the thermistor circuit comprises a thermistor, one end of the thermistor is grounded through a fourth resistor and is connected with an AIR terminal pin of the main control chip, the other end of the thermistor is connected with an AIR terminal pin of the main control chip and is connected with an ACM terminal pin of the main control chip through a third resistor, and the fourth resistor is connected with a ninth capacitor in parallel.