CN111289120A - Low-cost fixed-distance infrared temperature measuring device and method - Google Patents
Low-cost fixed-distance infrared temperature measuring device and method Download PDFInfo
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- CN111289120A CN111289120A CN202010238598.3A CN202010238598A CN111289120A CN 111289120 A CN111289120 A CN 111289120A CN 202010238598 A CN202010238598 A CN 202010238598A CN 111289120 A CN111289120 A CN 111289120A
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000009529 body temperature measurement Methods 0.000 claims description 20
- 238000005259 measurement Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 7
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- 238000004861 thermometry Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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Abstract
The invention discloses a low-cost distance infrared temperature measuring device and a method, which are realized by matching an infrared temperature measuring device with a distance compensation method, wherein the infrared temperature measuring device consists of a reflective distance measuring switch, an optical lens, an infrared temperature measuring probe, a sound prompting circuit, a conditioning circuit, a singlechip, a power supply, a communication interface and an LED (light emitting diode) indicator; the optical lens focuses infrared light emitted by a measured object and projects the infrared light to the infrared temperature measuring probe, the conditioning circuit conditions an electric signal emitted by the infrared temperature measuring probe, and outputs an amplified voltage signal and sends the amplified voltage signal to the analog input port of the single chip microcomputer; the distance measuring switch measures whether the object is in the measuring range, and directly connects the output switching value signal to the single chip microcomputer, and the single chip microcomputer carries out temperature compensation according to the measuring signal and a specific distance compensation method.
Description
Technical Field
The invention relates to a low-cost fixed-distance infrared temperature measuring device and method, which are particularly applied to high-precision infrared temperature measurement.
Background
In 1800 years, the british physicist f.w. huxlel investigated various colors from a thermal point of view, and found infrared rays. Infrared is an electromagnetic wave having the same nature as radio waves and visible light. The infrared ray has a wavelength of 0.76 to 1000 μm, and is classified into four types, near infrared, mid-infrared, far infrared, and far infrared, according to the wavelength range, and the position of the infrared ray in the continuous spectrum of the electromagnetic wave is a region between the radio wave and the visible light. In recent years, the infrared thermometer has the advantages of rapid technical development, perfect performance, continuously enhanced functions, continuously increased varieties and continuously expanded application range. Compared with a contact temperature measurement method, the infrared temperature measurement method has the advantages of fast response time, non-contact, safe use, long service life and the like. The non-contact infrared thermometer is composed of three large series of portable (handheld), on-line scanning, various choices and computer software, and each has various models and specifications.
The infrared thermometer consists of an optical system, a photoelectric detector, a signal amplifier, a signal processing part, a display output part and the like. The optical system converges the infrared radiant energy of the target in the field of view, and the size of the field of view is determined by the optical parts of the thermometer and the position of the optical parts. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal is converted into the temperature value of the measured target after passing through an amplifier and a signal processing circuit and being corrected according to an instrument internal therapy algorithm and target emissivity.
The infrared temperature measurement is related to the distance, and under the condition that the infrared radiation intensity is not changed and the receiving angle of the infrared sensor is not changed, the longer the distance from the target is, the lower the temperature is, and a nonlinear relation is presented. Generally, many infrared thermometry devices incorporate a non-contact ranging sensor. However, the measurement accuracy of the non-contact distance measuring sensor is affected by various factors, such as the angle of the reflecting surface of the material. In addition, the high-precision non-contact distance measuring sensor is expensive, and the cost of the temperature measuring device is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-cost fixed-distance infrared temperature measuring device and method.
The technical purpose of the invention is realized by the following technical scheme:
a low-cost distance infrared temperature measurement method is realized by matching an infrared temperature measurement device with a distance compensation method, wherein the infrared temperature measurement device consists of a reflection type distance measurement switch, an optical lens, an infrared temperature measurement probe, a sound prompt circuit, a conditioning circuit, a single chip microcomputer, a power supply, a communication interface and an LED (light emitting diode) indicator; the optical lens focuses infrared light emitted by a measured object and projects the infrared light to the infrared temperature measuring probe, the conditioning circuit conditions an electric signal emitted by the infrared temperature measuring probe, and outputs an amplified voltage signal and sends the amplified voltage signal to the analog input port of the single chip microcomputer; the reflective ranging switch measures whether an object is in a measuring range, a measuring signal of the reflective ranging switch is directly connected to the single chip microcomputer, the single chip microcomputer carries out temperature compensation according to the measuring signal and a specific distance compensation method, the distance compensation method carries out temperature measurement according to the signal change of the reflective ranging switch when the object approaches the temperature measuring device from far to near, and compensation temperature is output through a temperature compensation formula.
The distance compensation method comprises the following specific operation steps:
step 1, a measured object approaches from far to near to a temperature measuring device, and when a signal of a reflective distance measuring switch changes, a single chip sends out a prompt through a sound signal;
step 2, after hearing the prompt sound, the measured object stops moving, the LED lamp starts to flicker, temperature measurement is started, and the single chip microcomputer acquires the voltage value of the conditioning circuit;
step 3, about 1 second, stopping sampling when the temperature signal value of the measured object tends to be stable, and keeping the distance of the measured object;
and 4, temperature compensation calculation, wherein the calculation formula is as follows: t ═ T0+ Δ T, where T is the target temperature, T0The temperature before distance compensation is adopted, and delta T is a compensation difference value;
and 5: and sending the measurement result to the data acquisition equipment through the communication interface.
The compensation difference is calculated by the formula: Δ T ═ f (l, T), where f is the compensation function, l is the distance over which the reflective ranging switch changes, and T is the ambient temperature; the compensation function f was obtained from experimental data using binary linear regression.
The invention also aims to provide a low-cost fixed-distance infrared temperature measuring device which comprises a reflection type distance measuring switch, an optical lens, an infrared temperature measuring probe, a sound prompting circuit, a conditioning circuit, a single chip microcomputer, a power supply, a communication interface and an LED indicator; the optical lens, the infrared temperature measuring probe and the singlechip are sequentially and electrically connected, the reflective distance measuring switch, the sound prompting circuit, the communication interface and the LED indication are all electrically connected with the singlechip, and the power supply supplies power to the whole device; the sound prompt circuit and the LED prompt are used for prompting the distance measurement process.
In summary, compared with the prior art, the beneficial effects of the invention are as follows:
the infrared light emitted by the measured object is focused through the optical lens and projected to the infrared temperature measuring probe, the conditioning circuit conditions the electric signal emitted by the infrared temperature measuring probe, outputs the amplified voltage signal and sends the amplified voltage signal to the analog input port of the single chip microcomputer; whether the reflective ranging switch measures an object in a measuring range or not, a measuring signal of the reflective ranging switch is directly connected into the single chip microcomputer, the single chip microcomputer carries out temperature compensation according to the measuring signal by a specific distance compensation method, the novel infrared temperature measuring device is matched with the distance compensation method, the measuring precision of the temperature measuring device is greatly improved, a high-precision non-contact ranging sensor does not need to be adopted, and the cost of the temperature measuring device is reduced.
Drawings
FIG. 1 is a block diagram of a temperature measuring device according to an embodiment;
FIG. 2 is a schematic diagram of an embodiment of a temperature measuring device.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
A low-cost fixed-distance infrared temperature measuring device is shown in figure 1 and comprises a reflection type distance measuring switch, an optical lens, an infrared temperature measuring probe, a sound prompting circuit, a conditioning circuit, a single chip microcomputer, a power supply, a communication interface and an LED indicator; the optical lens, the infrared temperature measuring probe and the singlechip are sequentially and electrically connected, the reflective distance measuring switch, the sound prompting circuit, the communication interface and the LED indication are all electrically connected with the singlechip, and the power supply supplies power to the whole device; the sound prompt circuit and the LED prompt are used for prompting the distance measurement process.
The optical lens focuses infrared light emitted by a measured object and projects the infrared light to the infrared temperature measuring probe, the conditioning circuit conditions an electric signal emitted by the infrared temperature measuring probe, and outputs an amplified voltage signal and sends the amplified voltage signal to the analog input port of the single chip microcomputer; the reflective ranging switch measures whether an object is in a measuring range, a measuring signal of the reflective ranging switch is directly connected to the single chip microcomputer, the single chip microcomputer carries out temperature compensation according to the measuring signal and a specific distance compensation method, the distance compensation method carries out temperature measurement according to the signal change of the reflective ranging switch when the object approaches the temperature measuring device from far to near, and compensation temperature is output through a temperature compensation formula.
The distance compensation method comprises the following specific operation steps:
step 1, a measured object approaches from far to near to a temperature measuring device, and when a signal of a reflective distance measuring switch changes, a single chip sends out a prompt through a sound signal;
step 2, after hearing the prompt sound, the measured object stops moving, the LED lamp starts to flicker, temperature measurement is started, and the single chip microcomputer acquires the voltage value of the conditioning circuit;
step 3, about 1 second, stopping sampling when the temperature signal value of the measured object tends to be stable, and keeping the distance of the measured object;
and 4, temperature compensation calculation, wherein the calculation formula is as follows: t ═ T0+ Δ T, where T is the target temperature, T0The temperature before distance compensation is adopted, and delta T is a compensation difference value;
the compensation difference is calculated by the formula: Δ T ═ f (l, T), where f is the compensation function, l is the distance over which the reflective ranging switch changes, and T is the ambient temperature; the compensation function f is obtained through experimental data by using binary linear regression;
and 5: and sending the measurement result to the data acquisition equipment through the communication interface.
The specific embodiment is combined as follows:
as shown in FIG. 2, a certain object to be measured is in a container, and non-contact temperature measurement is needed, and the temperature measuring device is handheld and movable. When the temperature measuring device is used for detection, the measuring device moves from far to near, and when a certain distance is reached, the voice prompt keeps the distance and starts to measure the temperature. The LED lamp begins to flicker, after a period of time, the sampling is finished, the temperature measuring device performs compensation calculation in the single chip microcomputer, and sends out the measured temperature to finish the temperature measuring process.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.
Claims (6)
1. A low-cost distance infrared temperature measurement method is characterized in that an infrared temperature measurement device is matched with a distance compensation method to realize the distance measurement, and the infrared temperature measurement device consists of a reflection type distance measurement switch, an optical lens, an infrared temperature measurement probe, a sound prompt circuit, a conditioning circuit, a single chip microcomputer, a power supply, a communication interface and an LED (light emitting diode) indicator; the optical lens focuses infrared light emitted by a measured object and projects the infrared light to the infrared temperature measuring probe, the conditioning circuit conditions an electric signal emitted by the infrared temperature measuring probe, and outputs an amplified voltage signal and sends the amplified voltage signal to the analog input port of the single chip microcomputer; the reflective ranging switch measures whether an object is in a measuring range, a measuring signal of the reflective ranging switch is directly connected to the single chip microcomputer, the single chip microcomputer carries out temperature compensation according to the measuring signal and a specific distance compensation method, the distance compensation method carries out temperature measurement according to the signal change of the reflective ranging switch when the object approaches the temperature measuring device from far to near, and compensation temperature is output through a temperature compensation formula.
2. The method as claimed in claim 1, wherein the distance compensation method comprises the following specific steps:
step 1, a measured object approaches from far to near to a temperature measuring device, and when a signal of a reflective distance measuring switch changes, a single chip sends out a prompt through a sound signal;
step 2, after hearing the prompt sound, the measured object stops moving, the LED lamp starts to flicker, temperature measurement is started, and the single chip microcomputer acquires the voltage value of the conditioning circuit;
step 3, about 1 second, stopping sampling when the temperature signal value of the measured object tends to be stable, and keeping the distance of the measured object;
and 4, temperature compensation calculation, wherein the calculation formula is as follows: t ═ T0+ Δ T, where T is the target temperature, T0The temperature before distance compensation is adopted, and delta T is a compensation difference value;
and 5: and sending the measurement result to the data acquisition equipment through the communication interface.
3. The method of claim 2, wherein the compensation difference is calculated by: Δ T ═ f (l, T), where f is the compensation function, l is the distance over which the reflective ranging switch changes, and T is the ambient temperature; the compensation function f was obtained from experimental data using binary linear regression.
4. The low-cost fixed-distance infrared temperature measurement method according to claim 1, wherein the sound prompt circuit and the LED prompt the distance measurement process, and the power supply supplies power to the whole device.
5. A low-cost fixed-distance infrared temperature measuring device is characterized by comprising a reflection type distance measuring switch, an optical lens, an infrared temperature measuring probe, a sound prompting circuit, a conditioning circuit, a single chip microcomputer, a power supply, a communication interface and an LED (light emitting diode) indicator; the optical lens, the infrared temperature measuring probe and the singlechip are sequentially and electrically connected, the reflective distance measuring switch, the sound prompting circuit, the communication interface and the LED indication are all electrically connected with the singlechip, and the power supply supplies power to the whole device.
6. The infrared temperature measuring device with low cost and distance as claimed in claim 5, wherein the sound prompt circuit and the LED prompt the distance measurement process.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693149A (en) * | 2020-06-23 | 2020-09-22 | 广东小天才科技有限公司 | Temperature measurement method, device, wearable equipment and medium |
| CN112683837A (en) * | 2021-01-26 | 2021-04-20 | 杭州麦乐克科技股份有限公司 | Carbon dioxide concentration detection method based on infrared technology |
| CN112880840A (en) * | 2021-01-14 | 2021-06-01 | 深圳市美思先端电子有限公司 | Standard infrared temperature measuring device and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010230392A (en) * | 2009-03-26 | 2010-10-14 | Toshiba Corp | Human body temperature measuring apparatus and measuring method of the same |
| CN103565422A (en) * | 2013-11-06 | 2014-02-12 | 江苏大学 | Medical infrared thermometer and measurement compensating method of medical infrared thermometer |
| KR20170092024A (en) * | 2016-02-02 | 2017-08-10 | 주식회사 코아리버 | Temperature compensation thermometer and method using a distance measuring seneor |
| CN207528353U (en) * | 2017-12-08 | 2018-06-22 | 东莞市振海电子科技有限公司 | Ensure to measure accurately distance measurement formula temperature measurer |
| CN211527622U (en) * | 2020-03-30 | 2020-09-18 | 杭州麦乐克科技股份有限公司 | Low-cost fixed-distance infrared temperature measuring device |
-
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- 2020-03-30 CN CN202010238598.3A patent/CN111289120A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010230392A (en) * | 2009-03-26 | 2010-10-14 | Toshiba Corp | Human body temperature measuring apparatus and measuring method of the same |
| CN103565422A (en) * | 2013-11-06 | 2014-02-12 | 江苏大学 | Medical infrared thermometer and measurement compensating method of medical infrared thermometer |
| KR20170092024A (en) * | 2016-02-02 | 2017-08-10 | 주식회사 코아리버 | Temperature compensation thermometer and method using a distance measuring seneor |
| CN207528353U (en) * | 2017-12-08 | 2018-06-22 | 东莞市振海电子科技有限公司 | Ensure to measure accurately distance measurement formula temperature measurer |
| CN211527622U (en) * | 2020-03-30 | 2020-09-18 | 杭州麦乐克科技股份有限公司 | Low-cost fixed-distance infrared temperature measuring device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693149A (en) * | 2020-06-23 | 2020-09-22 | 广东小天才科技有限公司 | Temperature measurement method, device, wearable equipment and medium |
| CN112880840A (en) * | 2021-01-14 | 2021-06-01 | 深圳市美思先端电子有限公司 | Standard infrared temperature measuring device and control method thereof |
| CN112683837A (en) * | 2021-01-26 | 2021-04-20 | 杭州麦乐克科技股份有限公司 | Carbon dioxide concentration detection method based on infrared technology |
| CN112683837B (en) * | 2021-01-26 | 2023-07-21 | 杭州麦乐克科技股份有限公司 | Carbon dioxide concentration detection method based on infrared technology |
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