Ground Spectrometer

Abstract

The present invention discloses a ground object spectrometer, comprising a distance sensor and a detection head arranged on the first side of the ground object spectrometer body, an angle sensor and a controller arranged in the ground object spectrometer, and a display screen arranged on the second side; wherein the controller is electrically connected to the distance sensor, the detection head, the angle sensor, and the display screen; the controller can implement the following steps: obtaining the angle information of the ground object spectrometer detected by the angle sensor; obtaining the distance information between the ground object spectrometer body and the measured area detected by the distance sensor; obtaining the spectrum information of the measured area detected by the detection head; calculating the area of ​​the measured area according to the angle information, the distance information, and the field of view of the detection head; and displaying the area and spectrum information of the measured area on the display screen. The area of ​​the measured area and the height information and angle information of the detection can be accurately obtained while detecting.

Description

Technical Field

[0001] The invention relates to the field of spectroscopy, and in particular to a ground object spectrometer. Background Art

[0002] A ground object spectrometer is a photoelectric instrument for measuring the spectrum of ground objects such as vegetation, crops, soil, rocks, and water bodies. It is generally single-channel or multi-channel, and can also be equipped with more channels. The whole machine consists of an optical system and an electronic circuit system. It is small and light, and can be mounted on a tripod for field work or held for measurement. The physical contents measured include brightness, illumination reflectivity, spectral reflectivity, spectral distribution and other items. The ground object spectrometer integrates data measurement, collection, storage and calculation. It is an important instrument for collecting ground object spectral data and an important tool for extracting ground object spectral feature information.

[0003] When using a ground object spectrometer for measurement, it is sometimes necessary to obtain the distance between the ground object spectrometer and the object being tested and the area of ​​the object being tested. Currently, the test distance and the area of ​​the object being tested are generally calculated manually on the market. If more accurate data is required, a ruler and an inclinometer are required to assist in the test, which greatly reduces the test efficiency and data accuracy. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a ground object spectrometer that can accurately obtain the area of ​​the measured area and the detection height information during detection.

[0005] The embodiment of the present invention provides a ground object spectrometer, comprising a ground object spectrometer body, a distance sensor and a detection head arranged on a first side of the ground object spectrometer body, an angle sensor and a controller arranged in the ground object spectrometer, and a display screen arranged on a second side opposite to the first side; wherein the controller is electrically connected to the distance sensor, the detection head, the angle sensor and the display screen; and an executable code is stored in the controller, and the executable code can be executed by the controller to implement the following steps:

[0006] Acquire angle information of the ground object spectrometer detected by the angle sensor;

[0007] Acquire the distance information between the ground object spectrometer body and the measured area detected by the distance measuring sensor;

[0008] Acquiring spectrum information of the measured area detected by the detection head;

[0009] Calculating the area of ​​the measured area according to the angle information, the distance information and the field of view angle of the detection head;

[0010] The area and spectrum information of the measured region are displayed on a display screen.

[0011] Preferably, the angle sensor is a gyroscope sensor.

[0012] Preferably, the distance measuring sensor is an infrared distance measuring sensor.

[0013] Preferably, the area of ​​the measured area is calculated according to the angle information, the distance information and the field of view of the detection head, specifically:

[0014] When the angle information β is 90 degrees, determining whether the distance information is greater than a preset threshold;

[0015] If not, the diameter of the measured area is Y=D+2*X*tan(A / 2);

[0016] If so, the diameter of the measured area is Y=2*X*tan(A / 2);

[0017] Wherein, D is the diameter of the detection head, X is the distance information, and A is the field of view angle of the detection head.

[0018] Preferably, the preset threshold is 2 meters.

[0019] Preferably, when the angle information β is not 90 degrees, the diameter Y of the measured area = h[tan(β+α)-tan(β+α)];

[0020] Among them, h=X*cosβ, α=A / 2.

[0021] Preferably, the ground object spectrometer further comprises a camera arranged on the first side surface; and the display screen also simultaneously displays image information of the measured area captured by the camera.

[0022] In the above embodiment, by adding an angle sensor and a distance sensor, the ground object spectrometer can accurately and quickly obtain the area of ​​the measured area, the height information and the angle information during measurement, which is convenient for subsequent data sorting and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural diagram of a ground object spectrometer provided in an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of a ground object spectrometer provided by an embodiment of the present invention on a first side.

[0025] Figure 3 It is a hardware schematic diagram of the ground object spectrometer provided in an embodiment of the present invention.

[0026] Figure 4This is a working flow chart of the ground object spectrometer provided by an embodiment of the present invention.

[0027] Figure 5 This is a detection schematic diagram of a ground object spectrometer provided in an embodiment of the present invention.

[0028] Figure 6 This is another detection schematic diagram of the ground object spectrometer provided in an embodiment of the present invention.

[0029] Figure 7 It is a schematic diagram of a display interface of the ground object spectrometer provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 4 The embodiment of the present invention provides a ground object spectrometer, comprising a ground object spectrometer body 10, a distance sensor 20 and a detection head 30 arranged on a first side surface 11 of the ground object spectrometer body 10, an angle sensor 40 arranged in the ground object spectrometer, a controller 50, and a display screen 60 arranged on a second side surface 12 opposite to the first side surface 11; wherein the controller 50 is electrically connected to the distance sensor 20, the detection head 30, the angle sensor 40 and the display screen 50; the controller 50 stores executable code, and the executable code can be executed by the controller to implement the following steps:

[0032] S101, obtaining angle information of the ground object spectrometer detected by the angle sensor.

[0033] In this embodiment, the angle sensor 40 may be a gyroscope sensor, which is disposed in the ground object spectrometer body 10 and can measure angle information of the ground object spectrometer body 10 .

[0034] In this embodiment, the model of the gyro sensor may be MC3430, and the measurable angle range thereof is 0-180 degrees. Of course, in other embodiments of the present invention, other models of gyro sensors may also be used according to actual needs, and the present invention does not make specific limitations.

[0035] S102, obtaining distance information between the ground object spectrometer body and the measured area detected by the distance measuring sensor.

[0036] In this embodiment, the ranging sensor 20 may be an infrared ranging sensor, which is fixed on the first side 11 together with the detection head 30. When the detection head 30 sends a detection signal to the measured area, the ranging sensor 20 simultaneously obtains the distance information between the ground object spectrometer and the measured area, wherein the distance information is the straight-line distance information between the ranging sensor 20 and the measured area, not the vertical height of the ground object spectrometer.

[0037] In this embodiment, the model of the infrared distance measuring sensor may be GY-53VL53L1X. Of course, in other embodiments of the present invention, other models of infrared distance measuring sensors may also be used according to actual needs, and the present invention does not make specific limitations.

[0038] S103, acquiring spectrum information of the detected area detected by the detection head.

[0039] In this embodiment, during detection, the detection head 30 may emit detection light of a predetermined wavelength. After the detection light is emitted to the detected area, Mann scattering occurs on the surface of the object in the detected area and returns spectral information.

[0040] Generally speaking, the detection head 30 has a certain field of view angle, that is, its detection range is determined by the field of view angle. The field of view angle can be selected as 1 / 8 / 15 / 25 degrees according to actual needs, and the present invention does not make any specific limitation.

[0041] S104: Calculate the area of ​​the measured area according to the angle information, the distance information and the field of view of the detection head.

[0042] like Figure 5 As shown, in this embodiment, when the angle information β is 90 degrees, it means that the detection direction of the ground object spectrometer is perpendicular to the measured area, and at this time the distance information is equal to the vertical height of the ground object spectrometer.

[0043] Among them, since the detection head 30 itself also has a certain diameter, if the height is relatively low, the influence caused by the diameter of the detection head 30 itself cannot be completely ignored.

[0044] Therefore, when calculating the area of ​​the measured region, it is necessary to first determine whether the distance information is greater than a preset threshold (for example, set to 1 meter).

[0045] If the distance signal is less than the preset threshold, the diameter Y of the measured area is:

[0046] Y = D + 2*X*tan(A / 2);

[0047] If the distance signal is greater than the preset threshold, the diameter Y of the measured area is:

[0048] Y = 2*X*tan(A / 2).

[0049] Here, D is the diameter of the probe head 30 , X is distance information, and A is the field angle of the probe head 30 .

[0050] In this embodiment, if Figure 6 As shown, if the angle information β is not 90 degrees, it means that the detection direction of the ground object spectrometer is tilted at this time, and the measured area is elliptical at this time. Therefore, it is necessary to calculate according to the angle information to obtain the major semi-axis, the minor semi-axis and the vertical height of the ground object spectrometer:

[0051] in, Figure 6 In the equation (a), w is the length of the solid line, z is the length of the dashed line, and z = h[tan(β+α)-tanβ]; α = A / 2.

[0052] w can be calculated using the cosine formula We can also use the properties of right angles to find

[0053] The length of the major semi-axis of the ellipse is set to a, and the length of the minor semi-axis is set to b. Then:

[0054] 2a=h[tan(β+α)-tan(β-α)];

[0055] Line BC is the tangent line between the ellipse and the circle, and line OB is the line connecting the vertex and the tangent edge point.

[0056] The triangle where line OB lies is a right triangle. Given a right-angled side x and an angle α, half the length of line BC is xtanα. The length of line DE is

[0057] A coordinate system is established with the center point of the ellipse as the origin, the major axis as the x-axis, and the minor axis as the y-axis. Then the coordinates of the intersection of line OB and line BC and the point on the ellipse are (az, xtanα).

[0058] From the ellipse equation If we know a and the coordinates of a point on the ellipse (az, xtanα), we can substitute them into the ellipse equation and calculate the value of the minor axis b.

[0059] From this we can see that the area of ​​the ellipse is S = πab.

[0060] S105, displaying the area and spectrum information of the measured region on a display screen.

[0061] In this embodiment, after obtaining the area of ​​the measured area, spectral information and the vertical height of the ground object spectrometer, they can be displayed on the display screen 60, so that the user can obtain the detection results very intuitively, which is convenient for subsequent classification and analysis of the data.

[0062] Furthermore, the ground object spectrometer may further include a camera 70 disposed on the first side surface 11 ; the display screen 60 also simultaneously displays image information of the measured area captured by the camera 70 .

[0063] Among them, Figure 7 As shown, in this embodiment, the display screen 60 displays the image, area, and measurement height and measurement angle of the measured area on the left side, and displays the spectral information on the right side. In this way, the user can obtain a more comprehensive understanding of the detection situation and save it to facilitate subsequent data classification and analysis.

[0064] In summary, in this embodiment, by adding an angle sensor and a distance sensor to the ground object spectrometer, the ground object spectrometer can accurately and quickly obtain the area, measurement height and measurement angle information of the measured area when in use, which is convenient for subsequent data sorting and analysis.

[0065] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0066] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A ground object spectrometer, comprising a ground object spectrometer body, characterized in that: It also includes a distance sensor and a detection head arranged on the first side of the ground object spectrometer body, an angle sensor and a controller arranged in the ground object spectrometer, and a display screen arranged on a second side opposite to the first side; wherein the controller is electrically connected to the distance sensor, the detection head, the angle sensor and the display screen; the controller stores executable code, and the executable code can be executed by the controller to implement the following steps: obtaining angle information β of the ground object spectrometer detected by the angle sensor, wherein the angle information β is the angle between the optical axis of the detection head and the vertical direction; Obtaining distance information x between the ground object spectrometer body and the measured area detected by the distance measuring sensor, wherein the distance information x is the distance between the point O where the detection head is located and the center point of the detection beam on the ground; Acquiring spectrum information of the measured area detected by the detection head; The area of ​​the measured area is calculated according to the angle information, the distance information and the field of view of the detection head; wherein, when the angle information β is 0 degrees, it is determined whether the distance information is greater than a preset threshold; if not, the diameter of the measured area is Y=d+2*x*tan(A / 2); if yes, the diameter of the measured area is Y=2*x*tan(A / 2); d is the diameter of the detection head, x is the distance information, and A is the field of view of the detection head; when the angle information β is not 0 degrees, it means that the detection direction of the ground object spectrometer is inclined at this time, and the measured area is elliptical at this time. The major semi-axis, the minor semi-axis and the vertical height of the ground object spectrometer of the measured area are obtained by calculation according to the angle information: Wherein, w is the length of the solid line formed by the vertical projection point of the detection head point O on the ground to the center point D of the projection beam of the detection light on the ground, z is the length of the dotted line formed by the projection point D to the farthest end of the ellipse, and z = h [tan (β + α) - tan β]; α = A / 2; Where h is the distance from the point O where the detector is located to its vertical projection point on the ground; Assume the length of the major semi-axis of the ellipse is set to a, and the length of the minor semi-axis is set to b; then: 2a=h[tan(β+α)-tan(β-α)]; Line BC is the intersection line of the ellipse and the circle whose center is the center point D of the projected beam of the detection light on the ground, and line OB is the line connecting the point O where the detection head is located and the intersection edge point B; The triangle where line OB is located is a right triangle. Given a right-angled side with distance information x and an angle α, half the length of line BC is xtanα; the length of line DE is: E is the center of the ellipse; take the center point E of the ellipse as the origin, the major axis as the x-axis, and the minor axis as the y-axis to establish a coordinate system, then the coordinates of the intersection point B of line OB and line BC are (az, xtanα); From the ellipse equation Given a and the coordinates of a point on the ellipse (az, xtanα), substitute into the ellipse equation to calculate the value of the minor axis b; the area of ​​the ellipse is S = πab; The area and spectrum information of the measured region are displayed on a display screen.

2. The ground object spectrometer according to claim 1, characterized in that: The angle sensor is a gyroscope sensor.

3. The ground object spectrometer according to claim 1, characterized in that: The distance measuring sensor is an infrared distance measuring sensor.

4. The ground object spectrometer according to claim 1, characterized in that: The preset threshold is 2 meters.

5. The ground object spectrometer according to claim 1, characterized in that: The ground object spectrometer also includes a camera arranged on the first side; the display screen also simultaneously displays image information of the measured area captured by the camera.

Images