Portable infrared temperature measuring device and infrared temperature measuring method

Abstract

According to the invention, two infrared optical systems are arranged to respectively correspond to a photosensitive infrared detector circuit and a thermosensitive infrared detector circuit; the photoelectric conversion signal is increased and then transmitted to the display instrument by adjusting the infrared detector circuit; whether the temperature is in a normal range is judged, so that the light inlet angle and the type of the infrared detector are converted in the detector; the reason for inaccurate temperature detection can be quickly found; the phenomenon that the detector cannot detect directly after one infrared detection circuit is damaged can be prevented; determining that the detector has no problem but the temperature is still inaccurate; environmental factors and surface factors of an object to be detected can be checked.

Description

Technical Field

[0001] The present invention relates to the field of portable infrared temperature measurement; specifically, it is a portable infrared temperature measurement device and an infrared temperature measurement method. Background Art

[0002] At present, with the development of optical materials and photosensitive detection elements, the measurement range of radiation thermometers has been extended to relatively low temperatures. Infrared detectors were invented under such circumstances to measure the surface temperature of objects. Most current infrared detectors measure temperature using the infrared radiation of objects. Infrared radiation, also known as infrared rays, is invisible light outside the red light. Objects in nature will emit infrared rays of different intensities as long as their temperature is greater than absolute zero. Therefore, if the emissivity of an object is known, only by measuring the infrared radiation of the object to be measured can the temperature of the object be determined through calculation. All infrared temperature measurement devices are made based on this principle. When the temperature of an object is relatively low, the peak of the spectral radiant emittance migrates to the infrared wavelength region with longer wavelengths, and the infrared thermometer works in this infrared wavelength region, so it can measure relatively low temperatures. The advantage of an infrared thermometer is that it is easy to carry for temperature measurement. It consists of an optical system, an infrared detector, a signal processing and amplification part, and a display instrument. The role of the infrared detector in the prior art is to convert the received infrared light signal into an electrical signal. Currently, commonly used infrared detectors include photosensitive infrared detectors and thermosensitive infrared detectors. Among them, the working principle of the photosensitive infrared detector is that the electrons change their motion state after receiving light radiation, causing a change in the properties of the component. The principle of the thermosensitive infrared detector is to utilize the property that the temperature of the thermosensitive element increases after receiving infrared radiation. The factors affecting the temperature measurement of the infrared thermometer include emissivity, field of view, installation distance, spectral range, installation angle, vibration, material and surface characteristics of the object to be measured, etc., as well as environmental factors such as dust, water vapor, and smoke. Among them, the test effect of the portable infrared detector is particularly affected by various factors. When the distance between the detector and the object, the range of infrared light illumination, and the state of the object itself are affected, the temperature detection will deviate. In addition, the electrical conversion of infrared rays by the photosensitive element and thermosensitive element inside the infrared detector may also deviate. How to accurately find the temperature deviation problem of the infrared detector is an urgent problem to be solved in the prior art.

[0003] Technical Solution

[0004] A portable infrared temperature measurement device; it includes an infrared optical system Ι, an infrared optical system Ⅱ, a photosensitive infrared detector circuit, a thermosensitive infrared detector circuit, a shaping part Ι, a shaping part Ⅱ, a display instrument, a temperature controller Ι, a temperature controller Ⅱ, an environmental detection system, and an object surface detection system.

[0005] Furthermore, the infrared optical system Ι consists of an astigmatic window Ι, a beam splitter Ι, a condenser lens Ι, a light adjustment disc Ι, and an angle adjustment device for the beam splitter Ι; the infrared optical system ΙΙ consists of an astigmatic window ΙΙ, a beam splitter ΙΙ, a condenser lens ΙΙ, a light adjustment disc ΙΙ, and an angle adjustment device for the beam splitter ΙΙ; both the infrared optical system Ι and the infrared optical system ΙΙ are arranged in the infrared instrument housing.

[0006] Furthermore, the infrared instrument includes a lower handle housing, an upper support housing, and an infrared receiving port. The lower handle housing is arranged at the lower end of the upper support housing, and the other end of the upper support housing is connected with the infrared receiving port. An infrared optical system conversion system is also arranged inside the infrared instrument; the infrared optical system conversion system controls the conversion between the infrared optical system Ι and the infrared optical system ΙΙ through a button installed on the lower handle housing.

[0007] Furthermore, the astigmatic window Ι, the beam splitter Ι, and the condenser lens Ι are arranged in sequence; the astigmatic window ΙΙ, the beam splitter ΙΙ, and the condenser lens ΙΙ are arranged in sequence; the astigmatic window Ι and the astigmatic window ΙΙ are corresponding to the object to be measured through the infrared receiving port; a distance detection device is also arranged on the infrared receiving port, and the distance detection device detects the distance between the infrared receiving port and the object to be measured.

[0008] Furthermore, a surface cleaning system for the object to be measured is also arranged on the infrared receiving port. The surface cleaning system for the object to be measured includes a signal receiver, a blowing drive device, and a blowing device.

[0009] Furthermore, the radiation emitted by the object to be measured enters the infrared optical system through the receiving port, is first astigmatized through the astigmatic window and then reaches the beam splitter. The beam splitter is made of a material that can transmit infrared energy; infrared rays pass through the beam splitter; while radiation of other wavelengths cannot pass through the beam splitter.

[0010] Furthermore, after passing through the beam splitter, the infrared rays reach the condenser lens for focusing and are transmitted to the infrared detector circuit through the light adjustment of the light adjustment disc.

[0011] Furthermore, the infrared optical system Ι corresponds to a photosensitive infrared detector circuit; the infrared optical system ΙΙ corresponds to a thermosensitive infrared detector circuit.

[0012] Furthermore, the angle adjustment device for the beam splitter adjusts the angle of the beam splitter.

[0013] Further, the photosensitive infrared detector circuit includes a photosensitive resistor RL. The voltage across the photosensitive resistor RL is Ui1. One end of the photosensitive resistor RL is connected to one end of the first switch K1. After the first switch K1 is turned on, a resistor R1 and a resistor R2 are connected in parallel with the photosensitive resistor RL. A wire is connected between the resistor R1 and the resistor R2 and is connected to the first voltage amplification triode Vi1. On the other side of the first voltage amplification triode Vi1, a resistor R3 is also connected in parallel with the resistor R1 and the resistor R2. And at the connection point on the branch of the resistor R3, a wire is connected to the second voltage amplification triode Vi2. A second switch K2 is provided in the circuit between the resistor R3 and the second voltage amplification triode Vi2.

[0014] Further, the thermosensitive infrared detector circuit includes a thermistor RT. The voltage across the thermistor RT is Ui2. One end of the thermistor RT is connected to one end of the first switch K1. After the first switch K1 is turned on, a resistor R1 and a resistor R2 are connected in parallel with the thermistor RT. A wire is connected between the resistor R1 and the resistor R2 and is connected to the first voltage amplification triode Vi1. On the other side of the first voltage amplification triode Vi1, a resistor R3 is also connected in parallel with the resistor R1 and the resistor R2. And at the connection point on the branch of the resistor R3, a wire is connected to the second voltage amplification triode Vi2. A second switch K2 is provided in the circuit between the resistor R3 and the second voltage amplification triode Vi2.

[0015] Further, after the photosensitive infrared detector circuit receives the light passing through the condenser lens Ι and the light modulator disc Ι of the infrared optical system Ι, the optical signal is converted into an electrical signal.

[0016] Further, after the thermosensitive infrared detector circuit receives the light passing through the condenser lens Ⅱ and the light modulator disc Ⅱ of the infrared optical system Ⅱ, the optical signal is converted into an electrical signal.

[0017] Further, the photosensitive infrared detector circuit and the thermosensitive infrared detector circuit are connected to the shaping part, and the shaping part is connected to the display instrument.

[0018] Further, before the radiation line transmitted by the object is received through the infrared receiving port, the distance between the portable infrared temperature measuring device and the object to be measured is detected by the distance detection device first. A standard distance L0 is set in the distance detection device, and the distance detected by the distance detection device is L1. Then, infrared temperature detection is only carried out when 0 ≤ (L0 - L1) / L0 ≤ 0.005. If the above conditions are not met, the position of the portable infrared temperature measuring device is readjusted.

[0019] Further, after the position is adjusted accurately, first, the infrared optical system conversion system controls the infrared optical system Ι to work. After the infrared optical system Ι receives the infrared radiation of the object to be measured, it transmits it to the photosensitive infrared detector circuit.

[0020] Furthermore, the photoresistor RL of the photosensitive infrared detector circuit changes its resistance after receiving infrared rays; consequently, the voltage Ui1 across it changes; the first switch K1 is closed and the second switch K2 is opened, enabling the first voltage amplification triode Vi1 to amplify the detection signal of the voltage Ui1 and display the amplified voltage signal through the shaping section to the display instrument.

[0021] Furthermore, it is determined by the display instrument whether the amplified voltage detection signal can accurately display the object temperature; if it can be accurately displayed, then the next judgment is carried out; if the object temperature cannot be accurately displayed, then on the basis of closing the first switch K1, the second switch K2 is closed again; enabling the first voltage amplification triode Vi1 and the second voltage amplification triode Vi2 to amplify the detection signal of the voltage Ui1 again and display the amplified voltage signal through the shaping section to the display instrument.

[0022] Furthermore, the displayed temperature T1 is compared with the estimated standard temperature T0 of the object to be measured; if it is within a reasonable range, then the temperature is displayed; if the difference from the standard temperature T0 is too large, then the angle of the beam splitter Ι is adjusted by the beam splitter Ι angle adjustment device, thereby adjusting the intensity of the infrared rays entering the photosensitive infrared detector circuit.

[0023] Furthermore, after adjusting the angle of the beam splitter Ι, the temperature displayed by the photosensitive infrared detector circuit is compared with the standard temperature T0 again; if it is within a reasonable range, then the temperature is displayed; if the difference from the standard temperature T0 is too large, then it is converted to the infrared optical system Ⅱ through the infrared optical system conversion system for operation; the infrared rays are converted into electrical signals through the thermosensitive infrared detector circuit and the above process is repeated for the temperature output of the display.

[0024] Furthermore, the temperature T2 output by the thermosensitive infrared detector circuit is compared with the standard temperature T0; if the difference from the standard temperature T0 is too large, then the environmental temperature and the object surface are detected by the environmental detection system and the object surface detection system, and the object surface is cleaned by the object surface cleaning system.

[0025] Furthermore, the temperature controller Ι-Ⅱ always controls the temperature of the infrared detector circuit.

[0026] The present invention sets two infrared optical systems corresponding to a photosensitive infrared detector circuit and a thermosensitive infrared detector circuit respectively; adjusts the infrared detector circuit so that the photoelectric conversion signal is transmitted to the display instrument after increasing; determines whether the temperature is within the normal range, and then converts the light incident angle and the type of infrared detector inside the detector; quickly finds the reason for inaccurate temperature detection; and can prevent the detector from being directly unable to detect after one infrared detection circuit is damaged; after determining that the detector is okay but the temperature is still inaccurate, it can check the environmental factors and the surface factors of the object to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 is a schematic diagram of an infrared instrument.

[0028] Attached Figure 2 is a schematic diagram of infrared optical system Ι.

[0029] Attached Figure 3 is a schematic diagram of infrared optical system Ⅱ.

[0030] Attached Figure 4 is a schematic diagram of a photosensitive infrared detector circuit.

[0031] Attached Figure 5 is a schematic diagram of a thermosensitive infrared detector circuit.

[0032] 1 - infrared instrument; 2 - infrared receiving port; 3 - astigmatic window Ι; 4 - beam splitter Ι; 5 - condenser lens Ι; 6 - tuning disc Ι; 7 - photosensitive infrared detector circuit; 8 - shaping part; 9 - display instrument; 10 - astigmatic window Ⅱ; 11 - beam splitter Ⅱ; 12 - condenser lens Ⅱ; 13 - tuning disc Ⅱ; 14 - thermosensitive infrared detector circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] A portable infrared temperature measuring device; it consists of an infrared optical system Ι, an infrared optical system Ⅱ, a photosensitive infrared detector circuit, a thermosensitive infrared detector circuit, a shaping part Ι, a shaping part Ⅱ, a display instrument, a temperature controller Ι, a temperature controller Ⅱ, an environmental detection system, and an object surface detection system. The infrared optical system Ι includes a diffusing window Ι (3), a beam splitter Ι (4), a condenser lens Ι (5), a light adjusting disc Ι (6), and an angle adjusting device for the beam splitter Ι (4). The infrared optical system Ⅱ includes a diffusing window Ⅱ (10), a beam splitter Ⅱ (11), a condenser lens Ⅱ (12), a light adjusting disc Ⅱ (13), and an angle adjusting device for the beam splitter Ⅱ (11). Both the infrared optical system Ι and the infrared optical system Ⅱ are arranged in the infrared instrument housing. The infrared instrument 1 includes a lower handle housing, an upper support housing, and an infrared receiving port 2. The lower handle housing is arranged at the lower end of the upper support housing, and the other end of the upper support housing is connected with the infrared receiving port. An infrared optical system conversion system is also arranged inside the infrared instrument. The infrared optical system conversion system is controlled by a button installed on the lower handle housing to switch between the infrared optical system Ι and the infrared optical system Ⅱ. The diffusing window Ι (3), the beam splitter Ι (4), and the condenser lens Ι (5) are arranged in sequence. The diffusing window Ⅱ (10), the beam splitter Ⅱ (11), and the condenser lens Ⅱ (12) are arranged in sequence. The diffusing window Ι and the diffusing window Ⅱ face the object to be measured through the infrared receiving port. A distance detection device is also arranged on the infrared receiving port to detect the distance between the infrared receiving port and the object to be measured. A cleaning system for the surface of the object to be measured is also arranged on the infrared receiving port. The cleaning system for the surface of the object to be measured includes a signal receiver, a blowing driving device, and a blowing device. The radiation emitted by the object to be measured enters the infrared optical system through the receiving port, first undergoes diffusion through the diffusing window and then reaches the beam splitter. The beam splitter is made of a material that can transmit infrared energy. The infrared rays pass through the beam splitter, while radiation of other wavelengths cannot pass through the beam splitter. After passing through the beam splitter, the infrared rays reach the condenser lens for focusing and are transmitted to the infrared detector circuit through the light adjustment of the light adjusting disc. The infrared optical system Ι corresponds to the photosensitive infrared detector circuit. The infrared optical system Ⅱ corresponds to the thermosensitive infrared detector circuit. The angle adjusting device for the beam splitter adjusts the angle of the beam splitter. The photosensitive infrared detector circuit 7 includes a photosensitive resistor RL. The voltage at both ends of the photosensitive resistor RL is U i 1. One end is connected to one end of the first switch K1. After the first switch K1 is turned on, a resistor R1 and a resistor R2 are connected in parallel with the photosensitive resistor RL. A wire is connected between the resistor R1 and the resistor R2 and is connected to the first voltage amplification triode Vi 1. On the other side of the first voltage amplification triode Vi 1, a resistor R3 is also connected in parallel with the resistor R1 and the resistor R2. And a wire is connected at the connection point on the branch of the resistor R3 and is connected to the second voltage amplification triode Vi2. A second switch K2 is arranged on the circuit between the resistor R3 and the second voltage amplification triode Vi2;The thermosensitive infrared detector circuit 14 includes a thermistor RT. The voltage across both ends of the thermistor RT is Ui2. One end of the thermistor RT is connected to one end of the first switch K1. After the first switch K1 is turned on, a resistor R1 and a resistor R2 are connected in parallel with the thermistor RT. A wire is connected between the resistor R1 and the resistor R2, and a first voltage amplification triode Vi1 is connected. On the other side of the first voltage amplification triode Vi1, a resistor R3 is also connected in parallel with the resistor R1 and the resistor R2. And at the connection point on the branch of the resistor R3, a wire is connected to a second voltage amplification triode Vi2. A second switch K2 is provided on the circuit between the resistor R3 and the second voltage amplification triode Vi2; the photosensitive infrared detector circuit converts the optical signal into an electrical signal after receiving the light passing through the condenser lens Ι and the light control disc Ι of the infrared optical system Ι. The thermosensitive infrared detector circuit converts the optical signal into an electrical signal after receiving the light passing through the condenser lens Ⅱ and the light control disc Ⅱ of the infrared optical system Ⅱ. The photosensitive infrared detector circuit and the thermosensitive infrared detector circuit are connected to the shaping part, and the shaping part is connected to the display instrument; before the radiation line transmitted by the object is received through the infrared receiving port, the distance between the portable infrared thermometer and the object to be measured is detected by the distance detection device; a standard distance L0 is set in the distance detection device, and the distance detected by the distance detection device is L1. Then, infrared temperature detection is only carried out when 0≤(L0 - L1) / L0≤0.005; if the above conditions are not met, the position of the portable infrared thermometer is readjusted; after the position is adjusted accurately; first, the infrared optical system conversion system controls the infrared optical system Ι to work. After the infrared optical system Ι receives the infrared radiation of the object to be measured, it transmits it to the photosensitive infrared detector circuit. The photosensitive resistor RL of the photosensitive infrared detector circuit changes its resistance after receiving the infrared rays; thus, the voltage Ui1 across its two ends changes; the first switch K1 is closed, and the second switch K2 is opened, so that the first voltage amplification triode Vi1 amplifies the voltage detection signal of the voltage Ui1, and the amplified voltage signal is displayed on the display instrument through the shaping part. It is judged whether the amplified voltage detection signal can accurately display the object temperature through the display instrument; if it can be accurately displayed, the next judgment is carried out; if the object temperature cannot be accurately displayed, the second switch K2 is closed again on the basis of closing the first switch K1; so that the first voltage amplification triode Vi1 and the second voltage amplification triode Vi2 amplify the voltage detection signal of the voltage Ui1 again, and the amplified voltage signal is displayed on the display instrument through the shaping part; the displayed temperature T1 is compared with the estimated standard temperature T0 of the object to be measured. If it is within a reasonable range, the temperature is displayed. If the difference from the standard temperature T0 is too large, the angle of the beam splitter Ι is adjusted by the beam splitter Ι angle adjustment device, so as to adjust the intensity of the infrared rays transmitted into the photosensitive infrared detector circuit;After adjusting the angle of the beam splitter Ι, the temperature displayed by the photosensitive infrared detector circuit is compared with the standard temperature T0 again. If it is within a reasonable range, the temperature is displayed. If the difference from the standard temperature T0 is too large, it is converted by the infrared optical system conversion system to the infrared optical system Ⅱ for operation; the infrared rays are converted into electrical signals through the thermosensitive infrared detector circuit, and the above process is repeated for the temperature output of the display; the temperature T2 output by the thermosensitive infrared detector circuit is compared with the standard temperature T0. If the difference from the standard temperature T0 is too large, the environmental temperature and the object surface are detected through the environmental detection system and the object surface detection system, and the object surface is cleaned through the object surface cleaning system; the temperature controller Ι-Ⅱ always controls the temperature of the infrared detector circuit.

Claims

1. A portable infrared temperature measuring device; including infrared optical system I, infrared optical system II, photosensitive infrared detector circuit, thermal infrared detector circuit, shaping part I, shaping part II, display instrument, temperature controller I, temperature controller II, environment detection system, object surface detection system, infrared optical system I includes astigmatism window I, beam splitter I, condenser I, light adjustment disk I, beam splitter I angle adjustment device; infrared optical system II includes astigmatism window II, beam splitter II, condenser II, light adjustment disk II, beam splitter II angle adjustment device; infrared optical system I and infrared optical system II are both arranged in the infrared instrument housing, and the infrared instrument includes a lower handle housing The infrared instrument is composed of a body, an upper supporting shell and an infrared receiving port. The lower handle shell is arranged at the lower end of the upper supporting shell, and the other end of the upper supporting shell is connected with the infrared receiving port. An infrared optical system conversion system is also arranged inside the infrared instrument; the infrared optical system conversion system converts the infrared optical system I and the infrared optical system II by controlling the button installed on the lower handle shell; the astigmatism window I, the beam splitter I and the condenser I are arranged in sequence; the astigmatism window II, the beam splitter II and the condenser II are arranged in sequence; the astigmatism window I and the astigmatism window II correspond to the object to be measured through the infrared receiving port; a distance detection device is also arranged on the infrared receiving port, and the distance detection device detects the distance between the infrared receiving port and the object to be measured.

2. The portable infrared temperature measuring device according to claim 1, characterized in that: The infrared receiving port is also provided with a surface cleaning system of the object to be tested, and the surface cleaning system of the object to be tested includes a signal receiver, a blowing drive device and a blowing device.

3. The portable infrared temperature measuring device according to claim 2, characterized in that: The radiation emitted by the object to be measured enters the infrared optical system from the receiving port, is first diffused by the diffuser window, and then reaches the beam splitter. The beam splitter is made of a material that can project infrared rays. Infrared rays pass through the beam splitter, while radiation of other wavelengths cannot pass through the beam splitter.

4. The portable infrared temperature measuring device according to claim 3, characterized in that: After passing through the beam splitter, the infrared ray reaches the condenser for focusing and is transmitted to the infrared detector circuit through the dimming of the dimming disk; the infrared optical system I corresponds to the photosensitive infrared detector circuit; the infrared optical system II corresponds to the thermal infrared detector circuit, and the beam splitter angle adjustment device adjusts the angle of the beam splitter.

5. The portable infrared temperature measuring device according to claim 4, characterized in that: The photosensitive infrared detector circuit includes a photoresistor RL, the voltage across the two ends of the photoresistor RL is Ui 1, one end of the photoresistor RL is connected to one end of the first switch K1, after the first switch K1 is turned on, resistors R1 and R2 are connected in parallel with the photoresistor RL, a line connected between the resistors R1 and R2 is connected to a first voltage amplifying transistor Vi 1, a resistor R3 is also connected in parallel with the resistors R1 and R2 on the other side of the first voltage amplifying transistor Vi 1, and a second voltage amplifying transistor Vi2 is connected to a connecting line on the branch of the resistor R3, and a second switch K2 is arranged in the circuit between the resistor R3 and the second voltage amplifying transistor Vi 2.

6. The portable infrared temperature measuring device according to claim 5, characterized in that: The thermistor infrared detector circuit includes a thermistor RT, the voltage across the two ends of the thermistor RT is Ui2, one end is connected to one end of the first switch K1, after the first switch K1 is turned on, resistors R1 and R2 are connected in parallel with the thermistor RT, a line connected between the resistors R1 and R2 is connected to a first voltage amplifying transistor Vi1, a resistor R3 is also connected in parallel with the resistors R1 and R2 on the other side of the first voltage amplifying transistor Vi1, and a second voltage amplifying transistor Vi2 is connected to the connecting line on the branch of the resistor R3, and a second switch K2 is arranged in the circuit between the resistor R3 and the second voltage amplifying transistor Vi2.

7. The temperature measurement method of the portable infrared temperature measurement device according to claims 1-6; characterized in that: The photosensitive infrared detector circuit receives the light from the infrared optical system I through the condenser lens I and the modulation disk I and converts the light signal into an electrical signal. The thermal infrared detector circuit receives the light from the infrared optical system II through the condenser lens II and the modulation disk II and converts the light signal into an electrical signal. The photosensitive infrared detector circuit and the thermal infrared detector circuit are connected to the shaping part, and the shaping part is connected to the display instrument.

8. The temperature measurement method according to claim 7, characterized in that: Before the infrared receiving port receives the radiation transmitted by the object, the distance between the portable infrared temperature measuring device and the object to be measured is first detected by the distance detection device; the standard distance is set as L0 in the distance detection device, and the distance detected by the distance detection device is L1, and the infrared temperature detection is performed only when 0≤(L0-L1) / L0≤0.005; if the above conditions are not met, the position of the portable infrared temperature measuring device is readjusted; after the position is accurately adjusted; firstly, the infrared optical system I is controlled to work by the infrared optical system conversion system, and the infrared optical system I transmits the infrared radiation of the object to be measured to the photosensitive infrared detector circuit after receiving it, and the photoresistor RL of the photosensitive infrared detector circuit changes its resistance after receiving the infrared; thereby the voltage Ui1 at both ends thereof changes; the first switch K1 is closed, and the second switch K2 is opened, so that the first voltage amplifying transistor Vi1 amplifies the detection signal of the voltage Ui1, and displays the amplified voltage signal to the display instrument through the shaping part.

9. The temperature measurement method according to claim 8, characterized in that: The display instrument is used to determine whether the amplified voltage detection signal can accurately display the object temperature; if it can accurately display, the next step of determination is carried out; If the object temperature cannot be accurately displayed, the second switch K2 is closed again on the basis of closing the first switch K1, so that the first voltage amplifying transistor Vi1 and the second voltage amplifying transistor Vi2 amplify the detection signal of the voltage Ui1 again, and display the amplified voltage signal to the display instrument through the shaping part; The displayed temperature T1 is compared with the estimated standard temperature T0 of the object to be measured. If it is within a reasonable range, the temperature is displayed. If the difference with the standard temperature T0 is too large, the angle of the beam splitter 1 is adjusted by the beam splitter 1 angle adjustment device, thereby adjusting the infrared intensity transmitted to the photosensitive infrared detector circuit.

10. The temperature measurement method according to claim 9, characterized in that: After adjusting the angle of the beam splitter 1, the temperature displayed by the photosensitive infrared detector circuit is compared with the standard temperature T0 again. If it is within a reasonable range, the temperature is displayed. If the difference from the standard temperature T0 is too large, the infrared optical system conversion system is converted to the infrared optical system II for operation; the infrared is converted into an electrical signal through the thermal infrared detector circuit, and the above process is repeated to output the display temperature; the temperature output by the thermal infrared detector circuit is T2, which is compared with the standard temperature T0. If the difference from the standard temperature T0 is too large, the environmental temperature and the object surface are detected by the environmental detection system and the object surface detection system, and the object surface is cleaned by the object surface cleaning system; The temperature controller Ι-Ⅱ always controls the temperature of the infrared detector circuit.

Images