A portable rapeseed quality nondestructive testing device

Abstract

The utility model discloses a portable rapeseed quality nondestructive testing device, include: light source group, photoelectric sensor, sample cup, display screen, photoelectric converter, treater and power, the light source group includes LED array and light source fixer, the LED array includes a plurality of LED, and a plurality of LED annular symmetry is fixed on the light source fixer, the photoelectric sensor is fixed in the center of the light source fixer, and with same longitudinal axis on the sample cup, the display screen fixed setting is in the shell of device, the treater is fixed below the display screen, the treater is electrically connected between photoelectric converter, the photoelectric converter fixed setting is in the device bottom, the power provides power support for light source group, photoelectric sensor, display screen, photoelectric converter and treater through wire.

Description

Technical Field

[0001] This utility model relates to the field of crop quality testing technology, specifically to a portable non-destructive testing device for rapeseed quality. Background Technology

[0002] Rapeseed, the second largest oilseed crop after soybeans, has a significant impact on edible oil supply and the agricultural economy due to its yield and quality. Improving rapeseed yield and quality can provide high-quality raw materials for the food processing industry.

[0003] Currently, the conventional method for evaluating the internal quality indicators of rapeseed is chemical analysis. While this method provides accurate and reliable results, it has several drawbacks: high cost, high skill requirements for operators, long testing time, and different methods for different physicochemical indicators. For example, protein determination requires a Kjeldahl nitrogen analyzer, while glucosinolates and erucic acid require gas chromatography. Therefore, to overcome these limitations, researchers have begun exploring new detection technologies. Near-infrared spectroscopy, as a rapid and non-destructive detection method, has been proven suitable for the quality assessment of grain crops, providing a new technical approach for rapeseed quality testing.

[0004] Although near-infrared spectroscopy has shown some application potential in rapeseed quality testing, several problems still need to be addressed. Existing portable rapeseed internal quality testing instruments mostly use simple integrated core components, lacking efficient and accurate detection capabilities, and making it difficult to achieve rapid, non-destructive on-site testing. These problems limit the widespread application of near-infrared spectroscopy in rapeseed quality testing and urgently require improvement to meet the demands for efficient, accurate, and convenient testing. Utility Model Content

[0005] This invention proposes a portable non-destructive testing device for rapeseed quality, which solves the problem that existing portable rapeseed quality testing devices are unable to achieve rapid and non-destructive on-site testing.

[0006] To solve the above-mentioned technical problems, this utility model provides a portable non-destructive testing device for rapeseed quality, including: a light source group, a photoelectric sensor, a sample cup, a display screen, a photoelectric converter, a processor, and a power supply;

[0007] The light source group includes an LED array and a light source fixture. The LED array includes multiple LEDs, which are symmetrically fixed to the light source fixture in a ring.

[0008] The photoelectric sensor is fixed at the center of the light source holder and is located on the same longitudinal axis as the sample cup;

[0009] The power supply provides power to the light source assembly, photoelectric sensor, display screen, photoelectric converter, and processor via wires.

[0010] Preferably, the LED array comprises a plurality of LEDs, and the tangent between the emission optical axis of each LED and the central axis of the sample cup is 0.3.

[0011] Preferably, the radial distance r from each LED in the LED array to the photoelectric sensor and the axial distance d from each LED to the sample cup satisfy the following relationship:

[0012] rη = dtanθ;

[0013] In the formula, η is the deflection coefficient between the LED's emission optical axis and the central axis of the sample cup; θ is the deflection angle between the LED's emission optical axis and the central axis of the sample cup; 30mm≤r≤80mm.

[0014] Preferably, the power supply is located in a fixed compartment on the bottom plate of the device housing.

[0015] Preferably, the light source holder is funnel-shaped.

[0016] Preferably, a reference plate is provided on the side of the sample cup away from the light source assembly.

[0017] Preferably, the sample cup is provided with sapphire glass on the side closest to the light source assembly.

[0018] Preferably, the device is equipped with a heat dissipation system, and a heat spreader is provided behind the processor.

[0019] Preferably, the display screen is fixedly mounted on the outer casing of the device, and the angle between the display screen and the outer casing of the device is 45° or 135°.

[0020] Preferably, the photoelectric converter is fixed on a PCB circuit board, and the PCB circuit board is also provided with a current amplifier, a filter capacitor, a voltage regulator chip and a transformer circuit, and the PCB circuit board is fixedly disposed at the bottom of the device.

[0021] The advantages of this utility model include at least the following:

[0022] 1. Using optical detection technology, there is no need to physically or chemically damage the rapeseed, and quality testing can be completed without damaging the sample, which is suitable for scenarios where the integrity of the sample needs to be preserved.

[0023] 2. The device has a compact structure, is easy to carry, and is suitable for on-site testing in various scenarios. It can complete the testing of rapeseed quality in a short time and improve testing efficiency.

[0024] 3. Employing high-precision light source groups and photoelectric sensors, it can provide stable light sources and highly sensitive signal acquisition, ensuring the accuracy of detection results. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the device structure according to an embodiment of the present utility model;

[0026] Figure 2 This is a rear cross-sectional view of the device according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the light source assembly according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the PCB circuit board of this utility model;

[0029] Figure 5 This is a schematic diagram of the working process of the device according to an embodiment of the present invention.

[0030] In the diagram: 1-Light source group; 2-Photoelectric sensor; 3-Sample cup; 4-Display screen; 5-Photoelectric converter; 6-Processor; 7-Power supply; 8-LED array; 9-Light source holder; 10-Reference board; 11-Sapphire glass; 12-Heat dissipation system; 13-Heat spreader; 14-PCB circuit board; 15-Current amplifier; 16-Filter capacitor; 17-Voltage regulator chip; 18-Transformer circuit. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figure 1 and Figure 2 As shown in the figure, this utility model embodiment provides a portable non-destructive testing device for rapeseed quality, including: a light source group 1, a photoelectric sensor 2, a sample cup 3, a display screen 4, a photoelectric converter 5, a processor 6, and a power supply 7.

[0033] The light source assembly 1 includes an LED array 8 and a light source holder 9. The LED array 8 comprises multiple LEDs, which are symmetrically fixed to the light source holder 9 in a ring. The light source assembly 1 is used to illuminate the sample cup 3, which is located in the annular protrusion in the middle of the device's top cover and can be inverted. The symmetrical arrangement of multiple LEDs in a ring ensures that the rapeseed in the sample cup receives uniform light, avoiding problems such as light spot splitting and uneven illumination. Fixing the LED array 8 to the light source holder 9 ensures the stability of the light source assembly 1 and prevents the light source position from shifting during movement or use.

[0034] The photoelectric sensor 2 is fixed at the center of the light source holder 9 and is located on the same longitudinal axis as the sample cup 3. The processor 6 is electrically connected to the photoelectric converter 5, which is fixedly installed at the bottom of the device. The photoelectric sensor 2 is used to receive the light signal reflected by the rapeseed and convert it into a voltage signal. The photoelectric converter 5 converts the voltage signal of the photoelectric sensor 2 into a digital signal. The processor 6 receives the digital signal output by the photoelectric converter 5, calculates the quality index value of the rapeseed being tested, and outputs the result to the display screen 4.

[0035] Power supply 7 provides power to light source group 1, photoelectric sensor 2, display screen 4, photoelectric converter 5 and processor 6 through wires.

[0036] This device employs optical detection technology, eliminating the need for physical or chemical damage to the rapeseed. It enables quality testing without harming the sample, making it suitable for scenarios requiring the preservation of sample integrity. By utilizing a high-precision light source assembly and photoelectric sensors, it provides stable light and highly sensitive signal acquisition, ensuring accurate test results. The built-in processor rapidly analyzes and processes the acquired spectral data, providing reliable quality assessment results.

[0037] This compact and portable device is suitable for on-site testing in various settings, including fields, storage facilities, and markets. It can complete rapeseed quality testing in a short time, shortening the testing cycle and improving efficiency. Furthermore, it can simultaneously test multiple quality indicators, avoiding the cumbersome process of using multiple devices for separate testing in traditional methods.

[0038] like Figure 3 As shown, the tangent between the emission axis of each LED in the LED array 8 and the central axis of the sample cup 3 is 0.3.

[0039] Specifically, in this embodiment of the invention, the number of LEDs is set to ten, and the wavelengths of the ten LEDs are 850 nm, 930 nm, 975 nm, 1000 nm, 1090 nm, 1210 nm, 1380 nm, 1450 nm, 1470 nm, and 1550 nm, respectively. The tangent value of the axial offset angle of each LED is 0.3, obtained through Zemax simulation.

[0040] The tangent between the emission axis of each LED and the central axis of the sample cup 3 is 0.3, ensuring that the light intensity of the beam is highest at the center of the sample cup. The high light intensity center helps to improve the signal strength received by the photoelectric sensor, thereby improving the detection sensitivity.

[0041] The radial distance r from each LED in light source group 1 to photoelectric sensor 2 and the axial distance d from each LED to sample cup 3 satisfy the following relationship:

[0042] rη = dtanθ;

[0043] In the formula, η is the deflection coefficient between the emission optical axis of the LED and the central axis of the sample cup 3; θ is the deflection angle between the emission optical axis of the LED and the central axis of the sample cup 3; 30mm≤r≤80mm.

[0044] In this embodiment, r and d are set to 50 mm, the distance from the LED illumination point to the central axis of the light source holder 9 is set to 35 mm, and the distance between the photoelectric sensor 2 and the sample cup 3 is set to 65 mm. This ensures both the compactness of the light source group 1 and the beam focusing effect. By optimizing the structure and layout of the light source group, the overall size and weight of the device are reduced, making it more lightweight and portable. By setting the distance between the photoelectric sensor 2 and the sample cup 3 to 65 mm, it is ensured that the light signal can fully interact with the sample during its propagation from the sample cup 3 to the photoelectric sensor 2, while avoiding signal attenuation caused by excessively long optical paths. This distance setting ensures that the photoelectric sensor 2 receives a signal of sufficient intensity, thereby improving the sensitivity and accuracy of the detection.

[0045] The power supply 7 is located in a fixed compartment on the bottom plate of the device casing.

[0046] Specifically, placing the power supply 7 inside the fixed compartment ensures its secure position within the device, preventing displacement or loosening due to vibration or external forces during movement or use, thus guaranteeing stable operation of the device. Additionally, a main power switch is installed on the side of the device for convenient on / off operation.

[0047] The light source holder 9 is funnel-shaped.

[0048] Specifically, the light source holder 9 is funnel-shaped and fits tightly against the top cover of the device, which in turn is securely attached to the device cabinet via bolts and nuts. The funnel-shaped light source holder 9 effectively focuses the light emitted from the LED array 8 onto the central region of the sample cup 3. This design ensures that the light intensity is highest at the center of the sample cup 3, thereby improving the signal strength and quality received by the photoelectric sensor 2. Compared to traditional planar or cylindrical light source holders, the funnel-shaped structure reduces light scattering and loss during propagation, allowing more light to be concentrated on the sample, thus improving the utilization rate of light energy.

[0049] A reference plate 10 is provided on the side of the sample cup 3 away from the light source group 1.

[0050] Specifically, the reference plate 10 can provide a reference surface with known reflectivity or transmittance. By measuring the optical signal of the reference plate 10, the intensity of the light source group 1 can be calibrated to ensure that the output of the light source remains consistent during each detection. At the same time, the reference plate 10 can be used to compensate for interference from ambient light. By measuring the optical signal of the reference plate 10, the interference of background light can be subtracted, thereby improving the purity and reliability of the detection signal.

[0051] A sapphire glass 11 is provided on the side of the sample cup 3 near the light source group 1.

[0052] Specifically, the sapphire glass 11 has extremely high transmittance, especially in the visible and near-infrared spectral range. This ensures that the light signal emitted by the light source assembly 1 passes efficiently through the sample cup 3, reducing light absorption and scattering, thereby improving the intensity and quality of the detection signal. Furthermore, the refractive index of the sapphire glass 11 is close to that of many liquid and solid samples, reducing light reflection and refraction losses at the sample cup interface, further improving the transmittance of the light signal.

[0053] The device is equipped with multiple heat dissipation systems 12, and a heat spreader 13 is located behind the processor 6.

[0054] Specifically, multiple heat dissipation systems 12 are distributed in different locations inside the device, enabling more comprehensive coverage of heat-generating components such as the light source group 1, photoelectric sensor 2, photoelectric converter 5, and processor 6. This multi-point heat dissipation design can effectively reduce the overall temperature inside the device, ensuring that each component operates within its normal temperature range.

[0055] As a highly efficient heat transfer element, the heat spreader 13 can quickly and evenly distribute the heat generated by the processor 6 over a larger area, thereby improving heat dissipation efficiency. By placing the heat spreader 13 behind the processor 6, heat can be rapidly transferred to the heat dissipation system 12 or other heat dissipation components, further accelerating the heat dissipation speed.

[0056] The display screen 4 is fixedly mounted on the outer casing of the device, and the angle between the display screen 4 and the outer casing of the device is 45° or 135°.

[0057] Specifically, the angled design between the display screen 4 and the outer casing allows users to view test results and the operating interface more intuitively when operating the device, eliminating the need for frequent adjustments to the device's angle or position, thus improving operational convenience and efficiency. A quick-release interface is also located below the display screen 4, simplifying device debugging.

[0058] like Figure 4 As shown, the photoelectric converter 5 is fixed on the PCB circuit board 14. The PCB circuit board 14 is also equipped with a current amplifier 15, a filter capacitor 16, a voltage regulator chip 17 and a transformer circuit 18. The PCB circuit board is fixed to the bottom of the device by bolts.

[0059] Specifically, integrating the photoelectric converter 5, current amplifier 15, filter capacitor 16, voltage regulator chip 17, and transformer circuit 18 onto the same PCB board can significantly reduce the internal wiring complexity and space occupation of the device. This integrated design makes the device more compact, portable, and easy to operate.

[0060] The current amplifier 15 amplifies the weak current signal output by the photoelectric sensor 2 to a level suitable for subsequent processing, thereby improving signal strength and stability and ensuring the accuracy of the detection results. The filter capacitor 16 effectively removes noise and interference from the signal, improving signal purity. The signal amplification circuit composed of the current amplifier 15 and the filter capacitor 16 can achieve noise reduction and signal enhancement. The voltage regulator chip 17 converts the unstable input voltage into a stable 5.0V voltage and provides 1A of current output, providing a stable power supply for the photoelectric converter 5 and other electronic components, ensuring that these components maintain stable performance under different operating conditions and avoiding detection errors caused by power supply voltage fluctuations. The 1.2V transformer circuit 18 can convert the voltage provided by the power supply 7 into a suitable voltage value according to the voltage requirements of different components, thereby improving power utilization and reducing energy waste. By integrating the voltage regulator chip 17 and the transformer circuit 18, the device can achieve efficient power management, ensuring that each component receives the required power support.

[0061] The device in this embodiment employs a variety of high-performance components to achieve efficient and portable rapeseed quality testing. The specific configuration is as follows:

[0062] Photoelectric sensor 2: It adopts an indium gallium arsenide (InGaAs) photodiode, which has high sensitivity and good spectral response characteristics, and can accurately detect the optical signal of the sample.

[0063] Display screen 4: It adopts an LCD display screen, which can clearly and intuitively display the test results, making it convenient for users to view.

[0064] Photoelectric converter 5: Employs the ADS1115 multi-channel analog-to-digital converter, which can efficiently convert the analog signals collected by the photoelectric sensor into digital signals, providing support for subsequent data processing.

[0065] Power Supply 7: It uses five 18650 lithium batteries to provide stable power support and ensure that the device can operate for a long time without an external power source.

[0066] Processor 6: Utilizes a Raspberry Pi 5, boasting powerful data processing capabilities. A power switch for the Raspberry Pi 5 is located next to the display screen 4 for easy user operation.

[0067] Cooling system 12: It adopts two 3007 fans, which are symmetrically arranged on both sides inside the device to achieve efficient axial cooling and ensure the stability of the device during long-term operation.

[0068] Current Amplifier 15: The INA2180 current sensing amplifier is used, which can effectively amplify weak current signals and improve detection accuracy.

[0069] Zener power supply chip 17: The AMS1117 Zener power supply chip is used to ensure a stable voltage for each component and improve the reliability of the device.

[0070] The device measures 240 mm × 200 mm × 210 mm and weighs only 1.8 kg. Its compact design makes it easy to carry while also being user-friendly, meeting the needs for both portability and efficient detection.

[0071] like Figure 5 As shown, the working process of the device in this embodiment of the present invention includes the following steps:

[0072] Step S1: Switch the power and Raspberry Pi switches to supply power to the hardware of the device and processor, initialize the identified I / O interfaces, and start the automatic preheating of the light source group.

[0073] Step S2: Place the rapeseed in the sample cup. The user can choose to preheat, collect reference data, or collect the sample.

[0074] Step S3: Preheat the light source group by illuminating it five times without storing data, depending on the different touch points. Collect spectral data from the reference board; collect reflected light using a photoelectric sensor and convert it into an electrical signal. The data collection results are processed by the PCB circuit board and stored in the processor as reference data. Collect sample spectra, retrieve the spectra from the reference board, and calculate the corresponding absorbance for four groups of ten wavelengths.

[0075]

[0076] In the formula, A is the absorbance of the sample; I a The spectrum of the reference plate; I s This is the sample spectrum.

[0077] Step S4: Calculate the predicted value of rapeseed quality based on the absorbance of the sample and display the result on the LCD screen.

[0078] The layout of this utility model allows the reflected light angles of each channel light source to be consistent, resulting in high intensity while making the device lightweight, small in size, portable, economical, and efficient.

[0079] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. Only preferred embodiments of the present invention are shown, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. As long as the combination of these technical features does not contradict each other, it should be considered as within the scope of this specification.

[0080] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A portable non-destructive testing device for rapeseed quality, characterized in that, include: The light source assembly (1), photoelectric sensor (2), sample cup (3), display screen (4), photoelectric converter (5), processor (6) and power supply (7); The light source group (1) includes an LED array (8) and a light source fixture (9). The LED array (8) includes multiple LEDs, which are fixed in a ring-shaped symmetrical manner on the light source fixture (9). The photoelectric sensor (2) is fixed at the center of the light source holder (9) and is located on the same longitudinal axis as the sample cup (3); The power supply (7) provides power to the light source group (1), photoelectric sensor (2), display screen (4), photoelectric converter (5) and processor (6) through wires.

2. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The tangent between the emission optical axis of each LED in the LED array (8) and the central axis of the sample cup (3) is 0.

3.

3. The portable non-destructive testing device for rapeseed quality according to claim 2, characterized in that: The radial distance r from each LED in the LED array (8) to the photoelectric sensor (2) and the axial distance d from each LED to the sample cup (3) satisfy the following relationship: rη = dtanθ; In the formula, η is the deflection coefficient between the emission optical axis of the LED and the central axis of the sample cup (3); θ is the deflection angle between the emission optical axis of the LED and the central axis of the sample cup (3); 30mm≤r≤80mm.

4. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The power source (7) is located in a fixed compartment on the bottom plate of the device housing.

5. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The light source holder (9) is funnel-shaped.

6. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: A reference plate (10) is provided on the side of the sample cup (3) away from the light source group (1).

7. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The sample cup (3) is provided with sapphire glass (11) on the side near the light source group (1).

8. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The device is equipped with a heat dissipation system (12), and a heat spreader (13) is provided behind the processor (6).

9. A portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The display screen (4) is fixedly mounted on the outer casing of the device, and the angle between the display screen (4) and the outer casing of the device is 45° or 135°.

10. The portable non-destructive testing device for rapeseed quality according to claim 1, characterized in that: The photoelectric converter (5) is fixed on the PCB circuit board (14). The PCB circuit board (14) is also provided with a current amplifier (15), a filter capacitor (16), a voltage regulator chip (17) and a transformer circuit (18). The PCB circuit board (14) is fixedly located at the bottom of the device.

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