Low-power-consumption high-resolution infrared moisture meter

Abstract

The low-power-consumption high-resolution infrared moisture meter comprises a main body assembly, and the main body assembly comprises a machine shell, a light source transformer, a fixing plate, a control circuit board, an LED light source, a driving motor, a modulation disc, a filter disc, a detector and a supporting plate. When the device works, light is emitted from the light-transmitting hole in the light-transmitting plate, then is reflected by the reflecting plate and then is emitted to an object to be detected, is reflected to be in contact with the focusing mirror after being contacted, and returns to the detector, so that the result of the moisture content of the material can be obtained; through cooperation of the modulation disc, the filter disc and the driving motor, infrared light with specific wavelength can be alternately emitted to a measured object, and when the filter disc is driven by the motor to rotate at a high speed, infrared light with measurement wavelength and reference wavelength can be alternately emitted to the measured object, so that interference by external light is avoided.

Description

Technical Field

[0001] The utility model relates to an infrared moisture meter, in particular to a low-power consumption and high-resolution infrared moisture meter, belonging to the technical field of infrared moisture meters. Background Art

[0002] An infrared moisture meter is an instrument that uses infrared technology to measure moisture. It is widely used in various situations where the moisture content of materials needs to be measured, such as in agriculture, food, chemicals, pharmaceuticals and other industries.

[0003] The working principle of an infrared moisture meter is based on the absorption characteristics of infrared light. Specifically, different wavelengths of infrared light are absorbed by different components of the material being measured. Water has a strong absorption capacity for infrared light of specific wavelengths. Therefore, by measuring the change in the intensity of these specific wavelengths of infrared light before and after it passes through the material being measured, the moisture content of the material can be inferred.

[0004] During the use of infrared moisture meters, the intensity and stability of the external light source often affect the measurement accuracy of the infrared moisture meter. If the intensity of the external light source changes, it will interfere with the infrared moisture meter's detection of reflected light, resulting in measurement errors. Moreover, if there are light waves in the external light that are close to or overlap with the measurement wavelength, it will also interfere with the measurement results of the infrared moisture meter. Therefore, a low-power and high-resolution infrared moisture meter is proposed. Utility Model Content

[0005] The purpose of the present invention is to provide a low-power consumption and high-resolution infrared moisture meter to solve one of the problems raised in the above background technology.

[0006] The utility model is implemented by the following technical solutions: a low-power consumption and high-resolution infrared moisture meter, comprising a main body assembly, wherein the main body assembly comprises a housing, a light source transformer, a fixing plate, a control circuit board, an LED light source, a driving motor, a modulation disk, a filter disk, a detector and a support plate;

[0007] The fixing plate and the supporting plate are respectively fixedly connected to both sides of the inner wall of the casing, the light source transformer is installed on the upper surface of the control circuit board, the control circuit board is installed on the upper surface of the fixing plate, the LED light source is installed on the lower surface of the fixing plate, the inner bottom wall of the casing is fixedly connected with a vertical plate, the driving motor is installed on one side of the vertical plate, the modulation disk and the filter disk are located at the other end of the vertical plate and fixedly connected to the outer side wall of the output shaft of the driving motor, the detector is installed on the upper surface of the supporting plate, a focusing mirror is provided above the detector, and the focusing mirror is installed on the upper surface of the supporting plate.

[0008] As a further preferred embodiment of the present technical solution: a mounting seat is fixedly connected to the lower surface of the support plate, and a reflective plate is fixedly connected to the interior of the mounting seat.

[0009] As a further preferred embodiment of the present technical solution: a light-transmitting plate is fixedly connected to the lower surface of the fixed plate, light-transmitting holes are provided inside the light-transmitting plate and the vertical plate, and the position of the LED light source corresponds to the position of the light-transmitting hole.

[0010] As a further preferred embodiment of the present technical solution: the reflective plate is inclined at forty-five degrees, and the position of the light-transmitting hole corresponds to the position of the reflective plate.

[0011] As a further preferred embodiment of the present technical solution: the vertical plate is located between the fixed plate and the support plate.

[0012] As a further preferred embodiment of the present technical solution: the position of the light-transmitting hole corresponds to the position of the modulation disk and the position of the filter disk, a lens is mounted on the lower surface of the housing, and the position of the lens corresponds to the position of the reflector.

[0013] As a further preferred embodiment of the present technical solution: an infrared sensor is installed on the lower surface of the housing.

[0014] As a further preferred embodiment of the present technical solution: two top plates are symmetrically fixedly connected to the upper surface of the housing, and two mounting holes are symmetrically provided on the upper surface of the top plates.

[0015] Advantages of this utility model:

[0016] 1. When the utility model is working, light is emitted from the light-transmitting hole on the light-transmitting plate, then passes through the light-transmitting hole on the vertical plate, and passes through the modulation disk and the filter disk in sequence. At this time, the reference light and the measurement light alternately pass through the modulation disk and the retained light beam of the filter disk and hit the reflective plate. Then, after being reflected by the reflective plate, it hits the object to be measured. After contacting, it reflects and contacts the focusing lens and returns to the detector. According to the ratio between the reference signal and the measurement signal, the result of the moisture content of the material can be obtained.

[0017] 2. The utility model can realize the use of infrared light of specific wavelengths to alternately irradiate the object to be measured through the cooperation of the modulation disk, the filter disk and the driving motor. There are different filters on the filter disk, each filter only allows infrared light of a specific wavelength to pass through. When the filter disk is driven by the motor to rotate at high speed, infrared light of the measurement wavelength and the reference wavelength will be alternately irradiated to the object to be measured, thereby avoiding interference from light from the outside world. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the main component structure of the utility model;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] Figure 4 This is a schematic diagram of the optical path of the utility model when it is working.

[0023] In the figure: 101, main assembly; 11, housing; 12, light source transformer; 13, fixing plate; 14, control circuit board; 15, LED light source; 16, light-transmitting hole; 17, drive motor; 18, modulation disk; 19, filter disk; 21, detector; 22, reflector; 23, mounting seat; 24, focusing lens; 26, support plate; 27, vertical plate; 28, light-transmitting plate; 29, lens; 31, top plate; 32, mounting hole; 33, infrared sensor. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example

[0026] See also Figure 1-Figure 4 The utility model provides a technical solution: a low-power consumption and high-resolution infrared moisture meter, comprising a main assembly 101, the main assembly 101 including a housing 11, a light source transformer 12, a fixing plate 13, a control circuit board 14, an LED light source 15, a drive motor 17, a modulation disk 18, a filter disk 19, a detector 21 and a support plate 26;

[0027] The fixing plate 13 and the support plate 26 are respectively fixedly connected to the inner wall of the casing 11 on both sides, the light source transformer 12 is mounted on the upper surface of the control circuit board 14, the control circuit board 14 is mounted on the upper surface of the fixing plate 13, the LED light source 15 is mounted on the lower surface of the fixing plate 13, the inner bottom wall of the casing 11 is fixedly connected to the vertical plate 27, the drive motor 17 is mounted on one side of the vertical plate 27, the modulation disk 18 and the filter disk 19 are located at the other end of the vertical plate 27 and fixedly connected to the outer side wall of the output shaft of the drive motor 17, the detector 21 is mounted on the upper surface of the support plate 26, and a focusing lens 24 is provided above the detector 21, and the focusing lens 24 is mounted on the upper surface of the support plate 26;

[0028] In the infrared moisture meter, through the cooperation of the modulation disk 18, the filter disk 19 and the drive motor 17, it is possible to use infrared light of specific wavelengths to alternately irradiate the object to be measured. There are different filters on the filter disk 19, each of which only allows infrared light of a specific wavelength to pass through. When the filter disk 19 rotates at high speed driven by the motor, infrared light of the measurement wavelength and the reference wavelength will be alternately irradiated onto the object to be measured. The infrared light of the measurement wavelength will be absorbed by the moisture in the material.

[0029] In this embodiment, specifically: the lower surface of the support plate 26 is fixedly connected to the mounting seat 23, and the interior of the mounting seat 23 is fixedly connected to the reflective plate 22. The reflective plate 22 can realize directional reflection of infrared light, thereby changing the path of the infrared light.

[0030] In this embodiment, specifically: a light-transmitting plate 28 is fixedly connected to the lower surface of the fixed plate 13. Light-transmitting holes 16 are formed in the interior of the light-transmitting plate 28 and the vertical plate 27. The position of the LED light source 15 corresponds to the position of the light-transmitting hole 16. The reflective plate 22 is inclined at a 45-degree angle, and the position of the light-transmitting hole 16 corresponds to the position of the reflective plate 22. When the LED light source 15 is working, light is emitted from the light-transmitting hole 16 on the light-transmitting plate 28, then passes through the light-transmitting hole 16 on the vertical plate 27, and sequentially passes through the modulation disk 18 and the filter disk 19. At this time, the infrared light contacts the reflective plate 22 and changes direction, and is emitted toward the object to be measured;

[0031] During operation, the LED light source 15 emits light. At this time, the reference light and the measuring light alternately pass through the light beams retained by the modulation disk 18 and the filter disk 19 and are projected onto the reflector 22. Then, after being reflected by the reflector 22, they are projected onto the object to be measured. First, the reference light is projected onto the object to be measured, and then the measuring light is projected onto the object to be measured. These two time-sequential light energy pulses will be reflected and contact the focusing mirror 24. Under the reflection of the focusing mirror 24, they return to the detector 21 and are then converted into two electrical signals in sequence. The reference signal represents the expected amount of reflected energy, and the measuring signal is partially absorbed by water molecules, so its energy will be attenuated. The two signals are combined to form a ratio. The difference between this ratio and other ratios obtained from samples with different moisture contents is directly proportional to the difference in moisture content between the two. Various factors can adjust this ratio to form the result of measuring the moisture content of the material.

[0032] The signal strength of the two channels is combined into the following equation:

[0033]

[0034] Where Q is the ratio;

[0035] R represents the reference channel of the product beam;

[0036] M represents the measurement channel of the product beam;

[0037] M1 represents the measurement channel of the compensation beam;

[0038] R1 represents the reference channel of the compensation beam.

[0039] In this embodiment, specifically: the vertical plate 27 is located between the fixed plate 13 and the support plate 26, the position of the light-transmitting hole 16 corresponds to the position of the modulation disk 18 and the position of the filter disk 19, and a lens 29 is installed on the lower surface of the casing 11. The position of the lens 29 corresponds to the position of the reflective plate 22. The lens 29 can play a protective role and prevent dust from entering the casing 11.

[0040] In this embodiment, specifically: an infrared sensor 33 is installed on the lower surface of the casing 11, and a control terminal is provided on the outside of the casing 11 for receiving the signal of the detector 21. The infrared sensor 33 is used to detect the material. When the material is detected, the signal is sent to the control terminal, and the control terminal controls the moisture meter to work. When there is no material, the moisture meter automatically goes into sleep mode, thereby reducing the power consumption of the moisture meter. The model of the infrared sensor 33 is: GK152.

[0041] In this embodiment, specifically: two top plates 31 are symmetrically fixedly connected to the upper surface of the housing 11, and two mounting holes 32 are symmetrically opened on the upper surface of the top plates 31. The cooperation between the top plates 31 and the mounting holes 32 facilitates the installation and fixation of the housing 11.

[0042] The working principle or structural principle is that when in use, the housing 11 is installed in the designated position through the cooperation of the top plate 31 and the mounting hole 32, so that the lens 29 is aimed at the material to be tested. During operation, the LED light source 15 emits light, which is emitted from the light-transmitting hole 16 on the light-transmitting plate 28, then passes through the light-transmitting hole 16 on the vertical plate 27, and passes through the modulation disk 18 and the filter disk 19 in sequence. At this time, the reference light and the measurement light alternately pass through the modulation disk 18 and the filter disk 19. The retained light beams are projected onto the reflective plate 22, and then reflected by the reflective plate 22 and projected onto the object to be tested. First, the reference light is projected onto the object to be tested, and then the measurement light is projected onto the object to be tested. These two time-sequential light energy pulses will be reflected and contact the focusing lens 24. Under the reflection of the focusing lens 24, they return to the detector 21 and are then converted into two electrical signals in sequence. The reference signal represents the expected amount of reflected energy, and a part of the measurement signal is absorbed by water molecules, so its energy will be attenuated. The two signals are combined to form a ratio, which is the result of the moisture content of the material.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low-power, high-resolution infrared moisture meter, characterized in that: The invention comprises a main body assembly (101), wherein the main body assembly (101) comprises a housing (11), a light source transformer (12), a fixing plate (13), a control circuit board (14), an LED light source (15), a drive motor (17), a modulation disk (18), a filter disk (19), a detector (21) and a support plate (26); The fixing plate (13) and the supporting plate (26) are respectively fixedly connected to the two sides of the inner wall of the casing (11); the light source transformer (12) is mounted on the upper surface of the control circuit board (14); the control circuit board (14) is mounted on the upper surface of the fixing plate (13); the LED light source (15) is mounted on the lower surface of the fixing plate (13); the inner bottom wall of the casing (11) is fixedly connected with a vertical plate (27); the driving motor (17) is mounted on one side of the vertical plate (27); the modulation disk (18) and the filter disk (19) are located at the other end of the vertical plate (27) and fixedly connected to the outer side wall of the output shaft of the driving motor (17); the detector (21) is mounted on the upper surface of the supporting plate (26); a focusing mirror (24) is provided above the detector (21); and the focusing mirror (24) is mounted on the upper surface of the supporting plate (26).

2. A low-power consumption and high-resolution infrared moisture meter according to claim 1, characterized in that: The lower surface of the support plate (26) is fixedly connected to a mounting seat (23), and the interior of the mounting seat (23) is fixedly connected to a reflective plate (22).

3. A low-power consumption and high-resolution infrared moisture meter according to claim 2, characterized in that: A light-transmitting plate (28) is fixedly connected to the lower surface of the fixed plate (13), and light-transmitting holes (16) are provided inside the light-transmitting plate (28) and the vertical plate (27), and the position of the LED light source (15) corresponds to the position of the light-transmitting hole (16).

4. A low-power consumption and high-resolution infrared moisture meter according to claim 3, characterized in that: The reflecting plate (22) is inclined at forty-five degrees, and the position of the light-transmitting hole (16) corresponds to the position of the reflecting plate (22).

5. A low-power consumption and high-resolution infrared moisture meter according to claim 4, characterized in that: The vertical plate (27) is located between the fixed plate (13) and the support plate (26).

6. A low-power consumption and high-resolution infrared moisture meter according to claim 4, characterized in that: The position of the light-transmitting hole (16) corresponds to the position of the modulation disk (18) and the position of the filter disk (19); a lens (29) is mounted on the lower surface of the housing (11); and the position of the lens (29) corresponds to the position of the reflective plate (22).

7. A low-power consumption and high-resolution infrared moisture meter according to claim 6, characterized in that: An infrared sensor (33) is installed on the lower surface of the housing (11).

8. A low-power consumption and high-resolution infrared moisture meter according to claim 7, characterized in that: Two top plates (31) are symmetrically fixedly connected to the upper surface of the housing (11), and two mounting holes (32) are symmetrically provided on the upper surface of the top plate (31).

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