Pig body size measurement system and method

Abstract

The present invention provides a pig body measurement system and method. A first distance sensor capable of moving up and down is provided between a movable rod and a reference plate. The measuring light of the first distance sensor is perpendicular to the ruler rod, and the measuring point of the first distance sensor is located at the measured part of the pig's body surface. A second distance sensor is fixedly provided on the reference plate. The measuring light of the second distance sensor is parallel to the ruler rod, and the measuring point of the second distance sensor is located at the bottom end surface of the movable rod. The measuring method comprises the following steps: adjusting the position of the reference plate so that its upper end surface is against the lowest point of the pig's measured part, placing the lower end surface of the movable rod against the highest point of the pig's measured part, and obtaining the corresponding circumference of the pig's measured part. Using the present invention, the operator only needs to be on one side of the pig to quickly and smoothly measure the chest circumference or abdominal circumference of pigs of any age. This not only greatly simplifies the operation process of measuring the pig's chest circumference or abdominal circumference and reduces the measurement difficulty, but also greatly improves the measurement efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pig body size measurement, and in particular to a pig body size measurement system and method. Background Art

[0002] In the pig farming process, selecting excellent reserve breeding pigs can effectively improve the production performance of the pig farm and improve the economic benefits of the pig farm. The performance measurement of reserve breeding pigs is of great significance to the selection and breeding of reserve pigs. Among them, the measurement of the body size and weight of reserve pigs is one of the most intuitive indicators for evaluating the basic conditions of reserve breeding pigs. At present, the measurement of reserve pigs is usually carried out in a weighing cage. When measuring the chest circumference and abdominal circumference of the pigs, a soft tape measure is mainly used for measurement. During the operation, the tape measure usually needs to be passed through the pig's abdomen and then wrapped back. The disadvantages include extremely inconvenient operation and low efficiency (for pigs aged not less than 6 months, it takes an average of three minutes to measure the waist circumference or abdominal circumference of a pig), and it is also easy to injure the hands or arms of the staff. More importantly, when measuring the chest circumference and abdominal circumference of larger pigs (such as those weighing more than 100 kilograms), it is necessary to operate continuously in multiple positions to complete the measurement. For example, first stand on one side of the pig to place the tape measure, then go to the other side to pull the tape measure, and then wrap it around the pig's back to form a circle to take the reading. The whole process is difficult to measure smoothly, quickly and accurately.

[0003] In the prior art, the pig body measurement instrument disclosed in document CN215909783U includes a movable device mounted on the upper side of a fixed device. The fixed device includes a main measuring scale with a first scale mark on its surface. A secondary measuring scale is mounted on the left side of the main measuring scale and is fixedly connected to the main measuring scale. The movable device includes a movable rod with a movable ring mounted on its lower side, which is slidably connected to the main measuring scale. A movable block is mounted on the surface of the movable rod, with a circular hole on its surface. The movable rod and the circular hole are plugged into each other. An infrared rangefinder is mounted on the side of the movable block. However, this measuring instrument is only suitable for measuring the height and length of pigs. Summary of the Invention

[0004] At least in view of the technical problems mentioned in the background technology, the present invention aims to provide a pig body size measurement system and method.

[0005] The present invention adopts the following technical solutions.

[0006] A pig body size measurement system includes a horizontally arranged reference plate, a ruler rod vertically arranged on the reference plate, a movable rod capable of sliding up and down arranged near the ruler rod, a first distance sensor capable of moving up and down arranged between the movable rod and the reference plate, a measuring light of the first distance sensor perpendicular to the ruler rod, and a measuring point of the first distance sensor located at a measured part of the pig's body surface; a second distance sensor fixedly arranged on the reference plate, a measuring light of the second distance sensor parallel to the ruler rod, and a measuring point of the second distance sensor located at the bottom end surface of the movable rod; the distance sensor is connected to a controller, and when a processing module of the controller executes a program, the following steps are implemented:

[0007] S1, obtain the height value H fed back by the second distance sensor;

[0008] S2, obtaining the number of measurements N fed back by the first distance sensor and the horizontal distance value L corresponding to each measurement point, that is, the distance between the measurement point and the reference line of the first distance sensor;

[0009] S3, calculating the average height difference δH of the measurement light of the first distance sensor at adjacent measurement points according to formula (I);

[0010] δH=H / (N-1)…………(Ⅰ)

[0011] Where N-1 means that the height value H after N measurements is the sum of N-1 height differences. For example, after 20 measurements, 20 measurement points can be obtained, but there are only 19 height differences corresponding to these 20 measurement points.

[0012] S4, calculate the distance S between all adjacent measurement points according to formula (II) k , k = n-1;

[0013]

[0014] Where n represents the nth measurement of the first distance sensor, n-1 represents the n-1th measurement of the first distance sensor, and n ≥ 2 and is an integer; L1 represents the horizontal distance value obtained by the first measurement, that is, the horizontal distance between the first measurement point and the reference line of the first distance sensor; L n-1 Represents the horizontal distance value obtained by the n-1th measurement, that is, the horizontal distance between the n-1th measurement point and the reference line of the first distance sensor;

[0015] ∣L n -L n-1 ∣ represents the difference in horizontal distance between two adjacent measurement points, which can be expressed as δL;

[0016] S5, calculate the circumference of the measured part of the pig according to formula (III),

[0017] S=2*(S1+S2+...+S k )……………(Ⅲ).

[0018] Preferably, the measured part is the chest circumference, abdominal circumference or neck of the pig.

[0019] Preferably, the number of measurements N is not less than 20 times.

[0020] In order to further improve the accuracy of the measurement results and the stability during the measurement process, the first distance sensor is fixedly mounted on the nut of the screw mechanism. The screw of the screw mechanism is parallel to the ruler rod. The screw mechanism drive system adopts a servo motor, and measurement is performed whenever the nut moves to the specified position.

[0021] Furthermore, the servo motor controls the lead screw to rotate at a constant speed, so as to achieve the constant speed movement of the first distance sensor on the nut.

[0022] A measurement method using the aforementioned pig body measurement system comprises the following steps:

[0023] Step 1: Adjust the movable rod to the specified position so that the distance between the movable rod and the reference plate is greater than the height of the pig;

[0024] Step 2: Insert the reference plate below the pig's measured part and adjust the position of the reference plate so that its upper end surface abuts against the lowest point of the pig's measured part;

[0025] Step 3: Adjust the position of the movable rod so that the lower end of the movable rod is close to the highest point of the pig's measured part;

[0026] Step 4: Control the screw mechanism to operate so that the first distance sensor is located at the lower limit position, that is, the position corresponding to the first measurement;

[0027] Step 5: Obtain the height corresponding to the measured part of the pig according to step S1, and obtain the circumference corresponding to the measured part of the pig according to steps S1-S5, such as the pig's chest circumference and abdominal circumference.

[0028] As a preferred solution, during the measurement process, the reference plate is in a horizontal state.

[0029] Another measurement method using the aforementioned pig body measurement system comprises the following steps:

[0030] Step 11, adjust the movable rod to a specified position so that the distance between the movable rod and the reference plate is greater than the height of the pig;

[0031] Step 12: Insert the reference plate below the pig's measured part and place it flat on the ground;

[0032] Step 13, adjust the position of the movable rod so that the lower end surface of the movable rod is close to the highest point of the pig's measured part;

[0033] Step 14: Obtain the pig's body height according to step S1.

[0034] Beneficial effects: By adopting the solution of the present invention, the operator only needs to be on one side of the pig to successfully measure the chest circumference or abdominal circumference of pigs of any age within half a minute. This not only greatly simplifies the operation process of measuring the chest circumference or abdominal circumference of the pig and reduces the measurement difficulty, but also greatly improves the measurement efficiency and the accuracy of the measurement results, fundamentally avoiding the problem of easily injuring the operator's hands or arms in traditional measurement methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the pig body size measurement system in the embodiment (the nut is at the starting position);

[0036] Figure 2 Schematic diagram of the pig body size measurement system in use according to the embodiment;

[0037] Figure 3 for Figure 2 Schematic diagram of the main direction;

[0038] Figure 4 Schematic diagram of the principle of the measurement state in the embodiment. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the embodiments and drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all 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.

[0040] Example 1

[0041] A pig body measurement system, combined with Figures 1 to 4 As shown, it includes a horizontally arranged reference plate 1, a ruler rod 2 is vertically arranged on the reference plate 1, a movable rod 3 that can slide up and down is arranged near the ruler rod 2, and a first distance sensor 4 that can move up and down is arranged between the movable rod 3 and the reference plate 1, the measuring light of the first distance sensor 4 is perpendicular to the ruler rod 2, the measuring point of the first distance sensor 4 is located at the measured part of the pig's body surface, and the first distance sensor 4 is used to obtain the horizontal distance between the reference line of the first distance sensor 4 and the measured part of the pig's body surface; a second distance sensor 5 is fixedly arranged on the reference plate 1, the measuring light of the second distance sensor 5 is parallel to the ruler rod 2, the measuring point of the second distance sensor 5 is located at the bottom end surface of the movable rod 3, and the second distance sensor 5 is used to obtain the vertical distance between the reference plate 1 and the lower end surface of the movable rod 3; the distance sensor is connected to a controller, and the processing module of the controller implements the following steps when executing the program:

[0042] S1, obtaining the height value H fed back by the second distance sensor 5;

[0043] S2, obtaining the number of measurements N and the horizontal distance value L corresponding to each measuring point fed back by the first distance sensor 4, that is, the distance between the measuring point and the reference line of the first distance sensor 4;

[0044] S3, calculating the average height difference δH of the measurement light of the first distance sensor 4 at adjacent measurement points according to formula (I);

[0045] δH=H / (N-1…………(Ⅰ)

[0046] Where N-1 means that the height value H after N measurements is the sum of N-1 height differences;

[0047] S4, calculate the distance S between all adjacent measurement points according to formula (II) k , k = n-1;

[0048]

[0049] Where n represents the nth measurement of the first distance sensor 4, n-1 represents the n-1th measurement of the first distance sensor 4, n ≥ 2 and is an integer; L1 represents the horizontal distance value obtained by the first measurement, that is, the horizontal distance between the first measurement point and the reference line of the first distance sensor 4; L n-1 represents the horizontal distance value obtained by the n-1th measurement, that is, the horizontal distance between the n-1th measurement point and the reference line of the first distance sensor 4;

[0050] S5, calculate the circumference of the measured part of the pig according to formula (III),

[0051] S=2*(S1+S2+...+S k )……………(Ⅲ).

[0052] Among them, the first distance sensor 4 is fixedly mounted on the nut 6 of the screw mechanism, the screw rod 7 of the screw mechanism is parallel to the ruler rod 2, and the screw mechanism driving system adopts a servo motor 8, and measurement is performed whenever the nut 6 moves to a specified position; the servo motor 8 controls the screw rod 7 to rotate at a uniform speed to realize the uniform movement of the first distance sensor 4 on the nut 6.

[0053] During use, the nut 6 moves at a constant speed, driving the first distance sensor 4 to move at a constant speed in the vertical direction, and the horizontal distances corresponding to different measurement points can be measured at different set times. Figure 4As shown in the figure (for the convenience of marking, only eleven measuring points are schematically shown in the figure), when the nut 6 is at the lower limit position, the horizontal distance L1 measured by the first distance sensor 4 is exactly the horizontal distance between the lowest point of the pig's measured part and the reference line of the first distance sensor 4 (indicated by number 9 in the figure); when the nut 6 is at the upper target position (at this time, the lower end face of the movable rod 3 is against the highest point of the pig's measured part), the horizontal distance L 11 It is exactly the horizontal distance between the highest point of the measured part of the pig and the reference line of the first distance sensor 4 (indicated by number 9 in the attached figure); when the nut 6 is located at other measuring positions, the horizontal distances L2 to L 10 .

[0054] During the implementation process, the greater the number of measurements N, the more corresponding measurement points, and the more accurate the measured data. Considering that the surface 10 of the pig's measured part is approximately as follows in the circumferential direction Figure 4 If the circumference of the pig is a circle, the arc length S obtained when measuring on one side is half of the circumference of the pig's measured part. When the circumference of the pig's measured part is divided into several equal parts, each equal part can be regarded as a line segment (the length of the line segment is defined as S k ,like Figure 4 S in 1至 S 11 ), that is, the sum of the lengths of all line segments can be regarded as the perimeter of the measured part. Therefore, combined with the Pythagorean theorem, it is only necessary to measure the difference in the horizontal distance values ​​corresponding to two adjacent measuring points (expressed by δL, such as Figure 4 δL1 to δL 10 ) and the height difference (expressed as δH) corresponding to the two adjacent measuring points, the length of the line segment can be calculated. Before measuring the height difference corresponding to the two adjacent measuring points, a person skilled in the art can pre-set the measurement time based on the speed and distance range of the uniform movement of the nut 6 to ensure that the height difference between any two adjacent measuring points remains consistent as much as possible. This process actually divides the measured height into equal parts so that the height difference between the two adjacent measuring points remains consistent, such as Figure 4 As shown, the height between the 11 measurement points is divided into 10 height intervals.

[0055] A measurement method using the pig body measurement system of this embodiment is used to measure the waist circumference or abdominal circumference of a pig, comprising the following steps:

[0056] Step 1: Adjust the movable rod 3 to the specified position so that the distance between the movable rod 3 and the reference plate 1 is greater than the height of the pig. Figure 1 As shown;

[0057] Step 2: Stand to the side of the pig (left or right), and when the reference plate 1 is in a horizontal state, extend the reference plate 1 below the measured part of the pig, and adjust the position of the reference plate 1 so that its upper end surface is against the lowest point of the measured part of the pig;

[0058] Step 3, adjust the position of the movable rod 3 so that the lower end of the movable rod 3 is close to the high point of the pig's measured part; the state at this time can be referred to Figure 4 As shown;

[0059] Step 4: Control the screw mechanism to operate so that the first distance sensor 4 is located at the lower limit position (the state at this time is also referred to Figure 1 In the middle state, the nut 6 is also at the starting position), that is, the position corresponding to the first measurement;

[0060] Step 5, obtaining the height corresponding to the measured part of the pig according to step S1, and obtaining the circumference corresponding to the measured part of the pig according to steps S1-S5; Figure 2 and Figure 3 This schematically reflects the state of the first distance sensor 4 at a certain moment in the measurement process;

[0061] by Figure 4 For example, the height value H fed back by the second distance sensor 5 can be obtained through step S1; as the first distance sensor 4 moves upward at a uniform speed, the distance between each measuring point and the reference line of the first distance sensor 4 can be collected through step S2, including L1 to L 11 ; The average height difference δH of the measuring light of the first distance sensor 4 at adjacent measuring points can be calculated by step S3; The distance S between all adjacent measuring points can be calculated by step S4 k , including S 1至 S 11 ; Step S5 can be used to calculate the circumference of the pig's measured part, which is equal to S 1至 S 11 When the measured part is the pig's abdomen, the measurement is the pig's abdominal circumference; when the measured part is the pig's waist, the measurement is the pig's waist circumference.

[0062] Example 2

[0063] A measurement method using the pig body measurement system of this embodiment is used to measure pig growth, comprising the following steps:

[0064] Step 11, adjust the movable rod 3 to a specified position so that the distance between the movable rod 3 and the reference plate 1 is greater than the height of the pig;

[0065] Step 12: Extend the reference plate 1 below the measured part of the pig and place it flat on the ground;

[0066] Step 13, adjusting the position of the movable rod 3 so that the lower end surface of the movable rod 3 is close to the highest point of the pig's measured part;

[0067] Step 14: Obtain the pig's body height according to step S1.

[0068] Using the solution in Example 1, the chest circumference or abdominal circumference of pigs of any age can be successfully measured in half a minute, requiring only an operator to stand on one side of the pig. This not only greatly simplifies the operation process and reduces the difficulty of measurement, but also significantly improves measurement efficiency and the accuracy of the measurement results, fundamentally avoiding the problem of operator hand or arm injury in traditional measurement methods. The present invention, by leveraging the nearly symmetrical body shape of pigs and the aforementioned solution, cleverly enables smooth, rapid, and accurate measurement from a single side of the pig, making it convenient and practical.

Claims

1. A pig body measurement system, comprising a horizontally arranged reference plate, a ruler rod vertically arranged on the reference plate, and a movable rod capable of sliding up and down arranged near the ruler rod, characterized in that: A first distance sensor capable of moving up and down is provided between the movable rod and the reference plate. The measuring light of the first distance sensor is perpendicular to the ruler rod, and the measuring point of the first distance sensor is located at the measured part of the pig's body surface. A second distance sensor is fixedly provided on the reference plate. The measuring light of the second distance sensor is parallel to the ruler rod, and the measuring point of the second distance sensor is located at the bottom end surface of the movable rod. The distance sensor is connected to a controller. When the processing module of the controller executes a program, the following steps are implemented: S1, obtain the height value H fed back by the second distance sensor; S2, obtaining the number of measurements N fed back by the first distance sensor and the horizontal distance value L corresponding to each measurement point, that is, the distance between the measurement point and the reference line of the first distance sensor; S3, calculating the average height difference δH of the measurement light of the first distance sensor at adjacent measurement points according to formula (I); δH=H / (N-1)…………(Ⅰ) Where N-1 means that the height value H after N measurements is the sum of N-1 height differences; S4, calculate the distance S between all adjacent measurement points according to formula (II) k , k = n-1; Where n represents the nth measurement of the first distance sensor, n-1 represents the n-1th measurement of the first distance sensor, and n ≥ 2 and is an integer; L1 represents the horizontal distance value obtained by the first measurement, that is, the horizontal distance between the first measurement point and the reference line of the first distance sensor; L n-1 Indicates the horizontal distance value obtained by the n-1th measurement, that is, the horizontal distance between the n-1th measurement point and the first distance sensor baseline; |L n -L n-1 ∣ represents the difference in horizontal distance values ​​between two adjacent measurement points; S5, calculate the circumference of the measured part of the pig according to formula (III), S=2*(S1+S2+...+S k )……………(Ⅲ)。 2. The pig body size measurement system according to claim 1, characterized in that: The measured part is the chest circumference, abdominal circumference or neck of the pig.

3. The pig body measurement system according to claim 2, characterized in that: The number of measurements N is not less than 20 times.

4. The pig body measurement system according to claim 3, characterized in that: The first distance sensor is fixedly mounted on the nut of the screw mechanism. The screw of the screw mechanism is parallel to the ruler rod. The drive system of the screw mechanism adopts a servo motor.

5. A method for measuring the pig body size using the pig body size measurement system according to any one of claims 1 to 4, characterized in that the steps include: Step 1: Adjust the movable rod to the specified position so that the distance between the movable rod and the reference plate is greater than the height of the pig; Step 2: Insert the reference plate below the pig's measured part and adjust the position of the reference plate so that its upper end surface abuts against the lowest point of the pig's measured part; Step 3: Adjust the position of the movable rod so that the lower end of the movable rod is close to the highest point of the pig's measured part; Step 4: Control the screw mechanism to operate so that the first distance sensor is located at the lower limit position, that is, the position corresponding to the first measurement; Step 5: Obtain the height corresponding to the measured part of the pig according to step S1, and obtain the circumference corresponding to the measured part of the pig according to steps S1-S5, including the chest circumference and abdominal circumference of the pig.

6. The measuring method according to claim 5, wherein: During the measurement process, the reference plate is in a horizontal state.

7. A method for measuring the pig body size using the pig body size measurement system according to any one of claims 1 to 4, characterized in that the steps include: Step 11, adjust the movable rod to a specified position so that the distance between the movable rod and the reference plate is greater than the height of the pig; Step 12: Insert the reference plate below the pig's measured part and place it flat on the ground; Step 13, adjust the position of the movable rod so that the lower end surface of the movable rod is close to the highest point of the pig's measured part; Step 14: Obtain the pig's body height according to step S1.

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