CN218584217U

CN218584217U - Electronic thermometer capable of improving measurement accuracy

Info

Publication number: CN218584217U
Application number: CN202222857324.XU
Authority: CN
Inventors: 曹亮
Original assignee: Famidoc Technology Co ltd
Current assignee: Famidoc Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-07
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses an electronic clinical thermometer capable of improving the measurement accuracy. Including the thermometer main part with set up in the probe steel cap of thermometer main part lower extreme department, the thermometer main part embeds there are circuit board and with circuit board electric connection's battery and display screen, the display part of display screen exposes in the outside of thermometer main part, the medial surface department that the thermometer main part is located the probe steel cap is provided with two at least temperature sensor, temperature sensor uses the center pin of thermometer main part to carry out symmetrical arrangement as the symmetry axis, temperature sensor's detection face closely laminates in the medial surface of probe steel cap, temperature sensor and circuit board electric connection. The utility model discloses a plurality of temperature sensor synchronous measurement let the thermometer can improve the sensitivity and the accuracy of temperature measurement at the diversified temperature sensing measurement of temperature measurement in-process, shorten measuring time, avoid the false measured emergence that brings at the non-effective contact in the measurement process.

Description

Electronic thermometer capable of improving measurement accuracy

Technical Field

The utility model belongs to the technical field of the electronic product technique and specifically relates to an electrothermometer that can promote measurement accuracy.

Background

As is well known, an electronic thermometer directly outputs a digital signal by using a temperature sensor to output an electrical signal or converts a current signal (analog signal) into a digital signal that can be recognized by an internally integrated circuit, and then displays the temperature in a digital form through a display (e.g., a liquid crystal, a nixie tube, an LED matrix, etc.). The Temperature sensor NTC (Negative Temperature Coefficient) is a thermistor phenomenon and material having a Negative Temperature Coefficient, in which resistance decreases exponentially with Temperature rise, and is an element for converting a target Temperature value into a corresponding electrical signal.

At present, most of electronic thermometers in the market use an NTC to be placed in a probe steel cap at the front end to measure the temperature of a contact target, when the contact target wrapping performance is not particularly good, for example, when the temperature of an armpit is measured, only part of the steel cap is likely to be wrapped, the temperature of the steel cap is unbalanced, the temperature of the contact part is higher, the temperature of the non-contact part is lower, errors exist in the measured temperature value, and the accuracy cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the above-mentioned prior art, the utility model aims to provide a can promote the electrothermometer of measuring accuracy.

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

the utility model provides a can promote electrothermometer of measurement accuracy, includes the thermometer main part and sets up in the probe steel cap of thermometer main part lower extreme department, the thermometer main part embeds have the circuit board and with circuit board electric connection's battery and display screen, the display part of display screen exposes in the outside of thermometer main part, the medial surface department that the thermometer main part is located the probe steel cap is provided with two at least temperature sensor, temperature sensor uses the center pin of thermometer main part to carry out symmetrical arrangement as the symmetry axis, temperature sensor's detection face closely laminates in the medial surface of probe steel cap, temperature sensor and circuit board electric connection.

Preferably, the temperature sensor preferably employs an NTC thermistor.

Preferably, the integrated temperature detection circuit that has main control chip, quantity and temperature sensor equates on the circuit board, main control chip establishes ties with the display screen, temperature detection circuit includes first resistance and the second resistance of establishing ties each other, first resistance inserts the analog circuit power, second resistance connection temperature sensor, the both ends of second resistance form signal output part respectively and are connected with main control chip, the both ends of second resistance still are respectively through second electric capacity and third electric capacity ground connection.

Preferably, the main control chip is connected with an indicator lamp through a fifth resistor, and the main control chip is connected with a loudspeaker through a sixth resistor.

Since the technical scheme is used, the utility model discloses a plurality of temperature sensor synchronous measurement let the thermometer can improve the sensitivity and the accuracy of temperature measurement at the temperature measurement in-process diversified temperature sensing measurement, shorten measuring time, avoid the non-effective contact in the measurement process and the wrong measuring emergence of bringing.

Drawings

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

Fig. 2 is a schematic diagram of the internal structure at a in fig. 1 according to the embodiment of the present invention.

Fig. 3 is a schematic diagram of a system according to an embodiment of the present invention.

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

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

Fig. 6 is a schematic circuit diagram of a battery power supply module according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 to 6, the electronic thermometer capable of improving measurement accuracy provided in this embodiment includes a thermometer body 1 and a probe steel cap 3 disposed at a lower end of the thermometer body 1, the thermometer body 1 is internally provided with a circuit board (not shown in the figure) and a battery (not shown in the figure) and a display screen 2 electrically connected to the circuit board, a display portion of the display screen 2 is exposed outside the thermometer body 1, the thermometer body 1 is provided with at least two temperature sensors 4 at an inner side surface of the probe steel cap 3, the temperature sensors 4 are symmetrically arranged with a central axis of the thermometer body 1 as a symmetry axis, a detection surface of the temperature sensors 4 is closely attached to the inner side surface of the probe steel cap 3, and the temperature sensors 4 are electrically connected to the circuit board.

The utility model discloses mainly adopt 4 synchronous measurements of a plurality of temperature sensor, let the thermometer can improve the sensitivity and the accuracy of temperature measurement at the diversified temperature sensing measurement of temperature measurement in-process, shorten measuring time, avoid the non-effective contact in the measurement process and the wrong measuring emergence of bringing. Also, the temperature sensor 4 of the present embodiment is an NTC thermistor.

Further, this embodiment the integrated temperature detection circuit who has main control chip, quantity and temperature sensor 4 to equate on the circuit board, main control chip establishes ties with display screen 2, temperature detection circuit includes first resistance R1 and the second resistance R2 of establishing ties each other, first resistance R1 inserts the analog circuit power, temperature sensor 4 is connected to second resistance R2, second resistance R2's both ends form signal output part respectively and are connected with main control chip, second resistance R2's both ends still are respectively through second electric capacity C2 and third electric capacity C3 ground connection. When the thermometer specifically works, each temperature sensor 4 respectively senses the temperature of two or more directions in the steel cap of the thermometer probe, the corresponding temperature is converted into an electric signal, then a main control chip (single chip microcomputer) respectively collects the corresponding electric signals through two ADC paths and converts the electric signals into corresponding target temperatures T1 and T2 through an internal software algorithm (a conventional software algorithm is arranged in each thermometer), and the high value is taken to judge that the target temperature is closer to the direction of a measurement target part by comparing the temperature values of T1 and T2, and the corresponding temperature value is displayed for a user.

Further, this embodiment the main control chip is connected with pilot lamp D1 through fifth resistance R5, the main control chip is connected with speaker BUZ through sixth resistance R6. Thus, the relevant acousto-optic prompt of the work can be given.

The above is only the preferred embodiment of the present invention, and the patent scope of the present invention is not limited thereby, and all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the same way in the patent protection scope of the present invention.

Claims

1. The utility model provides a can promote electronic clinical thermometer of measurement accuracy which characterized in that: including the thermometer main part with set up in the probe steel cap of thermometer main part lower extreme department, the thermometer main part embeds there are circuit board and with circuit board electric connection's battery and display screen, the display part of display screen exposes in the outside of thermometer main part, the medial surface department that the thermometer main part is located the probe steel cap is provided with two at least temperature sensor, temperature sensor uses the center pin of thermometer main part to carry out symmetrical arrangement as the symmetry axis, temperature sensor's detection face closely laminates in the medial surface of probe steel cap, temperature sensor and circuit board electric connection.

2. The electronic thermometer of claim 1, further comprising: the temperature detection circuit that the circuit board is integrated with master control chip, quantity and temperature sensor equates, master control chip establishes ties with the display screen, temperature detection circuit includes first resistance and the second resistance of establishing ties each other, first resistance inserts the analog circuit power, temperature sensor is connected to the second resistance, the both ends of second resistance form signal output part respectively and are connected with master control chip, the both ends of second resistance still are respectively through second electric capacity and third electric capacity ground connection.

3. An electronic thermometer according to claim 2, wherein the electronic thermometer comprises: the main control chip is connected with an indicator lamp through a fifth resistor, and the main control chip is connected with a loudspeaker through a sixth resistor.