Low-stress light supplement method for henhouse inspection robot

Abstract

The application discloses a low-stress light supplementing method of a chicken house inspection robot. The method comprises the following steps: installing a cool white light source on the inspection robot in the chicken house; and when the inspection robot is used to inspect each cage in the chicken house, the cool white light source is used to irradiate the chickens in each cage passed by the inspection robot in sequence to supplement the light of the chickens with low stress. The method can improve the levels of chicken serum glutamine, chicken superoxide dismutase, chicken corticosterone, chicken follicle stimulating hormone and chicken estradiol of laying hens, thereby effectively improving the stress level of the laying hens under the influence of the inspection robot without affecting the egg production rate, reducing the damage to the poultry body, increasing the yield and achieving better breeding efficiency. The method has the dual advantages of image acquisition quality optimization and animal welfare guarantee, and provides reliable technical support for intensive breeding.

Description

TECHNICAL FIELD

[0001] The application relates to a light supplementing method, relates to the technical field of poultry breeding automation, and in particular to a low-stress light supplementing method of a chicken house inspection robot. BACKGROUND

[0002] Eggs and chicken products are rich in high-quality protein and are indispensable animal protein sources in daily life and are also high-performance substitutes for red meat. Today, the demand for eggs and chicken is increasing, thereby promoting the development of the laying hen industry. Laying hen breeding is a crucial link in the chicken breeding industry, and in order to ensure increased production to meet actual market demand, only an intensive agricultural model can be used. Through large-scale and high-density breeding, the traditional free-range breeding concept is replaced. However, the large-scale and high-density background makes the task of laying hen breeding more difficult, and the breeders have to face larger and more crowded chicken houses than before, which greatly increases the workload of the breeding task. Under this breeding method, a large amount of labor needs to be invested, which is not only time-consuming and labor-intensive, but also different breeders can also affect the efficiency and results of the breeding task. At the same time, due to the increase in breeding density, the traditional method lacking in innovative technology can bring safety hazards to the breeders who work a lot in the chicken house, and the breeders' frequent entry into the chicken house also brings great pressure to the prevention of the epidemic in the chicken house, which greatly promotes the birth and application of the inspection robot technology.

[0003] However, the landing of robot technology in the agricultural scene still faces the scientific problem of animal behavior adaptation. Taking the light supplementing system of the inspection robot as an example, the visual perception module of the existing device mainly relies on visible light or near-infrared spectrum imaging technology, and in order to ensure the quality of image acquisition, an auxiliary light source such as an LED light supplementing lamp needs to be turned on. However, as a light period sensitive poultry, the egg hen has a high sensitivity to the wavelength of 400-700nm in the retina, especially the blue light (450-480nm) and the red light (620-750nm) bands, which may cause a strong stress response. Experimental research shows that when the cold white light (color temperature 6000K) in the chicken house suddenly increases by more than 200lux, the egg hen will show stress characteristics such as pupil contraction, feather erection and increased activity, and the serum cortisol concentration will increase by 15%-22% within 30 minutes, which directly affects the egg production rate and eggshell quality. This phenomenon exposes the technical blind spot in the current development of the inspection robot—most research focuses on the development of basic functions such as simultaneous localization and mapping (SLAM) navigation and mechanical arm control, but ignores the coordination and optimization of livestock welfare and equipment operation. Therefore, it is urgent to solve the problem of stress and egg production rate caused by the influence of the inspection robot. SUMMARY

[0004] In order to solve the problems in the background art, the present application provides a low-stress light supplement method for a henhouse inspection robot. The method is used to optimize the light environment of a laying henhouse, and provides cold white light with a color temperature of 6500K and an illumination intensity of 20 lx to effectively alleviate the adverse reactions such as fright stress caused by the inspection robot during the inspection process, thereby reducing the stress indicators such as superoxide dismutase SOD (Superoxide Dismutase), chicken corticosterone CORT (Chicken Corticosterone), serum glutamine Gln, follicle-stimulating hormone FSH (Follicle-stimulating Hormone), and estradiol E2 (estradiol) in the body of the laying hen, and avoiding the inflammation reaction, oxidative stress and other potential negative effects caused by fright stress to hinder the production performance of the laying hen.

[0005] The technical solutions adopted by the present application are as follows:

[0006] The low-stress light supplement method for the henhouse inspection robot of the present application comprises the following steps:

[0007] The light source of cold white light is installed on the inspection robot, and when the inspection robot is used to inspect each stacked cage in the henhouse, the light source of cold white light is used to irradiate the chickens in each stacked cage passed by the inspection robot in turn to supplement the light for the chickens with low stress.

[0008] The present application aims to supplement the light for the laying hen with a light source of a light color temperature that minimizes the stress of the laying hen, so that the laying hen always maintains the stress level in the case without light supplement interference and does not affect the egg production rate even in the case of light supplement by the inspection robot.

[0009] The color temperature of the light source of cold white light is 5500K-6500K.

[0010] The illumination intensity of the light source of cold white light is 20 lx.

[0011] The light source of cold white light is an incandescent lamp, a light emitting diode (LED) lamp, an organic light emitting diode (OLED) lamp, a quantum LED lamp, or a fluorescent lamp, etc., and is not limited thereto, and other light sources that can achieve the color temperature value can be used; the light source is detachable, and the required light source can be replaced and irradiated to the stacked cage in different actual needs.

[0012] The chickens in each of the stacked chicken cages in the henhouse are all laying hens entering the laying period, specifically 55 weeks old in the laying period; the laying hens are Hy-Line Gray but are not limited thereto, and the laying hens are commercial laying hens but can be extended to all laying birds; the laying period refers to a period from the initial laying period of the laying hens to the period after the peak period but is not limited thereto, and can also be extended to the feeding process of cage laying hens.

[0013] The stress level of the laying hens after irradiation by the cold white light source on the inspection robot is the same as or differs from the stress level without light supplement by the inspection robot by less than a preset stress threshold.

[0014] The laying rate of the laying hens after irradiation by the cold white light source on the inspection robot is the same as or differs from the laying rate without light supplement by the inspection robot by less than a preset laying rate threshold.

[0015] The inspection robot inspects at a uniform speed to monitor the laying hens in each of the stacked chicken cages in real time through the camera on the inspection robot.

[0016] The start time of irradiation by the cold white light source is a preset first time point in the morning and a preset second time point in the afternoon each day, and the duration of each irradiation of each stacked chicken cage is the same.

[0017] The size of each stacked chicken cage in the henhouse is the same.

[0018] The beneficial effects of the present application are:

[0019] 1. The method of the present application uses special color temperature light as the light supplement source of the inspection robot to adjust the hormone secretion of the laying hens such as serum glutamine, superoxide dismutase, corticosterone, chicken follicle stimulating hormone and chicken estradiol level, thereby improving the stress level of the laying hens and maintaining the laying rate, and also achieving the effect of low energy consumption and green energy saving.

[0020] 2. The method of the present application is based on the actual breeding scene and combines real factors to effectively alleviate the damage to poultry caused by stress caused by light supplement, further reduces the stress caused by light supplement to poultry, and improves the animal welfare of poultry breeding.

[0021] In summary, the present application can effectively improve the stress level of the laying hens under the influence of the inspection robot without affecting the laying rate, reduce the damage to the poultry body, and even increase the yield to achieve better breeding efficiency. The method of the present application has the dual advantages of image acquisition quality optimization and animal welfare guarantee, and provides reliable technical support for intensive breeding. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the inspection and light supplement of the inspection robot of the present application;

[0023] Figure 2 is a result graph of different light supplement groups of chicken hormone index levels, wherein, Figure 2 (a) of the above is a result graph of different light supplement groups of chicken serum glutamine Gln hormone index levels, Figure 2 (b) of the above is a result graph of different light supplement groups of chicken superoxide dismutase SOD hormone index levels, Figure 2 (c) of the above is a result graph of different light supplement groups of chicken follicle stimulating hormone FSH hormone index levels, Figure 2 (d) of the above is a result graph of different light supplement groups of chicken estradiol E2 hormone index levels, Figure 2 (e) of the above is a result graph of different light supplement groups of chicken corticosterone CORT hormone index levels, Figure 2 (f) of the above is a result graph of different light supplement groups of chicken peroxidase POD hormone index levels, Figure 2 (g) of the above is a result graph of different light supplement groups of chicken progesterone PROG hormone index levels, Figure 2 (h) of the above is a result graph of different light supplement groups of chicken melatonin hormone index levels, Figure 2 (i) of the above is a result graph of different light supplement groups of chicken luteinizing hormone LH hormone index levels;

[0024] Figure 3 is a schematic diagram of the operation mode of the body temperature sensor of the present application;

[0025] Figure 4 is a body temperature data graph of different light supplement groups of chickens, wherein, Figure 4 (a) of the above is a body temperature data graph of 2700K light supplement group of chickens from 9:30 to 10:30 in the morning, o1, o2, etc. represent the number of 2700K light supplement group of chickens wearing body temperature sensors; Figure 4 (b) of the above is a body temperature data graph of 6500K light supplement group of chickens from 9:30 to 10:30 in the morning;

[0026] Figure 5 is a noise comparison graph of different light supplement groups of chickens, wherein, Figure 5 (a) of the above is a noise graph of 2700K light supplement group of chickens, Figure 5 (b) of the above is a noise graph of 6500K light supplement group of chickens, Figure 5 (c) of the above is a noise graph of the control group of chickens;

[0027] In the figure: 1, inspection robot, 2, light source, 3, computer, 4, camera, 5, microphone, 6, laminated chicken coop, 7, laying hen. DETAILED DESCRIPTION

[0028] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] As shown in the drawings, Figure 1 The application uses a standard henhouse as the breeding environment of the hens 7, and the size of the stacked cages 6 used in the application is 45cm*40cm*42cm. A water line is placed in each stacked cage 6, and the water source is continuous to provide the daily drinking water needs of the hens 7. There is a feeding trough beside each stacked cage 6, and five hens 7 are bred in each stacked cage 6. A feeding cart is started at 6:00, 12:00, 16:00 and 18:00 every day to supplement the feed. A light bulb is installed at the top of the breeding henhouse, and the light intensity is controlled by a light intensity controller to instantly adjust the light intensity and uniformly illuminate the entire cage breeding area. In the application, 36 sets of cage-bred Hy-Line gray hens 7 are selected for experiments of two experimental groups and one parallel control group, with 6 replicates in each group.

[0030] The two experimental groups of the application are designed as follows: 1) the inspection robot 1 uses the light source 2 with a light intensity of 20lx and a light color temperature of 2700K for inspection; 2) the inspection robot 1 uses the light source 2 with a light intensity of 20lx and a light color temperature of 6500K for inspection, i.e. the cold white light source 2 is installed on the inspection robot 1 in the henhouse. When the inspection robot 1 is used to inspect each stacked cage 6 in the henhouse, the cold white light source 2 is used to irradiate the chickens in each stacked cage 6 passed by the inspection robot 1 in turn to perform low-stress light compensation for the chickens. The control group is designed to not perform light compensation when the inspection robot is inspected. The light source 2 is detachable, and the required light source 2 can be replaced in different actual needs, and the stacked cage 6 is irradiated; the stress and light compensation period of the hens 7 includes the entire laying period of poultry, and the laying period refers to a period from the initial laying period to the peak period of the hens 7, but is not limited thereto, and can be extended to the feeding process of the cage-bred hens 7.

[0031] The inspection robot 1 inspects at a uniform speed to monitor the hens 7 in each stacked cage 6 in real time through the camera 4 on the inspection robot 1, which can be specifically 20-25cm / s, and preferably 20cm / s; the running noise of the inspection robot 1 is below 40db, which does not affect the daily diet and sleep of the hens 7, and the image of the hens 7 taken by the camera 4 can be transmitted to the computer 3 for real-time monitoring.

[0032] The application aims to perform low-stress light compensation for the hens 7 by using the light source 2 with the light color temperature that minimizes the stress of the hens 7, so that the hens 7 always maintain the stress level in the case without light compensation interference and do not affect the laying rate even in the case of light compensation by the inspection robot 1.

[0033] The specific implementation process of the application is as follows:

[0034] The light cycle of the experimental group and the control group is set according to the light cycle of the hen house, that is, light:darkness = 16:8 is appropriate, and the light time is appropriately not less than 16h, for example, taking 16:8, the light time can be set to 8:00-24:00, and the dark time can be set to 0:00-8:00 of the next day.

[0035] First, 180 Hy-Line gray laying hens with the same age, similar weight and similar physiological conditions were selected for breeding, 5 laying hens were randomly allocated to each stacked cage, the breeding density was less than 10 / m³, which met the animal welfare requirements, and livestock and poultry breeding white light was used during the period, the room temperature was controlled at 23±1℃, and the relative humidity was controlled at 50%-60%.

[0036] Then the experiment was conducted, experimental group one cw: during the breeding process after the laying hens laid eggs, the inspection robot 1 used the light source 2 of the LED lamp to emit light with a color temperature of 6500 K and an illumination intensity of 20 lx as a supplementary light to irradiate the laying hens for 2-3s every day, the irradiation time points were 10:00 and 16:00 respectively, a remote controller was used to operate the inspection robot 1 to reduce the stress caused by human activities on the laying hens, and the irradiation was continued for 21 days. Experimental group two ww: using the same conditions as experimental group one, the light source 2 of the LED lamp was used to emit 2700 K light as a supplementary light to irradiate the laying hens every day, which was synchronized with experimental group one. The control group ck: the experimental conditions are the same as experimental groups one and two, but the inspection robot 1 only inspects according to the preset route every day during the experiment, and no supplementary light operation is performed to ensure that there is no other variable that may cause stress except the supplementary light factor.

[0037] In the present application, 55-week-old Hy-Line gray laying hens in actual breeding scenes are selected as experimental objects of the experimental group and the control group, and are placed in stacked cages, experimental group one, experimental group two and the control group each have 6 repeated groups, and every two cages of laying hens form a repeated group, and each cage of laying hens has 5 laying hens. LED lamps are arranged above the channel of the breeding area, and other light sources are removed around the breeding area to avoid interference. The breeding area has two parts, and experimental group one, experimental group two and the control group are separated to avoid light source interference. During the experiment, the feed, water, temperature and humidity of the chickens are guaranteed, and the feeding standards of the experimental chickens are unified.

[0038] Then sampling detection is performed, and the sampling stage is set at the end of the entire experimental stage, that is, on the 21st day of the experiment, after the inspection robot 1 is operated for supplementary light (the supplementary light angle is horizontal, and the effective irradiation radius is 20 cm), the collected sample indexes are serum indexes, body temperature and sound.

[0039] Serum index detection, each repeat group of 2 hens 7 to draw blood (control group without light, but in the experimental group one and two at the same time to collect indicators), the experimental group and the control group were respectively grabbed 12 hens 7 to draw blood operation, and timely serum separation operation, detection of serum glutamine Gln, superoxide dismutase SOD, follicle stimulating hormone FSH, estradiol E2, chicken corticosterone CORT, peroxidase POD, progesterone PROG, melatonin and luteinizing hormone LH hormone index, the test results are as follows Figure 2 (a), Figure 2 (b), Figure 2 (c), Figure 2 (d), and Figure 2 (e) shown, after light irradiation, hormone analysis showed that the control group and the 2700K light group had significant differences in the content of serum glutamine Gln, superoxide dismutase SOD, follicle stimulating hormone FSH, estradiol E2, chicken corticosterone CORT, and compared with the 2700K light group, the serum glutamine Gln (P<0.01), superoxide dismutase SOD (P<0.0001), chicken corticosterone CORT (P<0.001) of the 6500K light group were significantly reduced, follicle stimulating hormone FSH had no significant difference, but the content was significantly reduced, which was beneficial to improve the egg laying rate of hens; at the same time, although estradiol E2 had no significant difference, the content was significantly increased. It is proved that 6500K irradiation significantly improves the antioxidant capacity of hens, reduces the peroxidation effect caused by light stress, and at the same time, the increase of estradiol E2 also represents the improvement of the production capacity of hens; there is no significant difference between the 6500K light group and the non-light group in various hormone indexes, which shows that the stress caused by 6500K light group and non-light group to hens is low. At the same time, as shown in Figure 2 (f), Figure 2 (g), Figure 2 (h), and Figure 3 (i), there is no significant difference among the three groups of progesterone PROG, peroxidase POD, melatonin, luteinizing hormone LH, one asterisk in the figure represents that the statistical significance reaches the preset threshold, which usually corresponds to the probability value p-value satisfying p<0.05, that is, rejecting the original hypothesis at the 5% significance level; two asterisks represent high significance, corresponding to p<0.01, rejecting the original hypothesis at the 1% significance level; three asterisks represent extremely high significance, corresponding to p<0.001, rejecting the original hypothesis at the 0.1% significance level; four asterisks represent super high significance, corresponding to p<0.0001, rejecting the original hypothesis at the 0.01% significance level, emphasizing the extremely strong statistical evidence; the ns symbol in the figure represents that the statistical test does not reach the preset significance level, usually p≥0.05, and the original hypothesis cannot be rejected, that is, the effect size or the difference between groups has no statistical significance.

[0040] As shown in Figure 4 , when detecting the body temperature index, the TSic716 digital temperature sensor is used to collect the body temperature information, and the internal integrated radio frequency module RF (Radio Frequency) module of the microcontroller unit MCU (Microcontroller Unit) is used to send signals to the router terminal. The TSic716 digital temperature sensor and the microcontroller unit MCU integrated module are made into a patch and attached to the armpit of the laying hen 7 to collect the body temperature data of the laying hen 7 in real time. The router receives the 2.4 GHz frequency band signal sent by the node radio frequency module RF and sends every 4 temperature signals to the cloud end of the database server through the MQTT protocol. Users can read the body temperature data of the laying hen in real time through the NFC function of mobile devices such as mobile phones, and monitor the body temperature changes of the laying hen. The body temperature intelligent sensing cloud platform on the computer PC end or mobile end has rich functions, including real-time viewing, exporting and visualizing of body temperature data, historical review, early warning, etc. Through the export of the whole temperature report, the poultry body temperature can be traced, and remote users can integrate and analyze the data based on this, summarize the historical laying hen body temperature trend, and take preventive measures in advance if abnormalities are found. The body temperature data of the laying hen 7 is collected 15 minutes before and after the light supplementing of the inspection robot 1, the body temperature change table is obtained, and the significance of the body temperature data is analyzed, and the results are shown in Figure 4 (a) and Figure 4 (b), Figure 4 (a) represents the temperature change range of the 2700K light supplement group, o1, o2, etc. represent the laying hen numbers wearing the body temperature sensor, and the body temperature data in the figure shows that the temperature change fluctuates obviously, indicating that the 2700K light supplement will affect the metabolism of the laying hen to a certain extent; Figure 5 (b) represents the temperature change range of the 6500K light supplement group, w1, w2, etc. represent the laying hen numbers wearing the body temperature sensor, and the body temperature data in the figure is smoother compared with (a), indicating that the 6500K light supplement group has weaker influence on the body temperature change of the laying hen. In addition, t-test analysis is performed on the body temperature data of each minute after light supplement stress of the experimental group and the 6500K control group, and there is no significant difference between groups every minute after light supplement stress occurs.

[0041] When detecting the sound index, the SGC-578 high-sensitivity microphone 5 is installed on the inspection robot 1, and the noise of the laying hen 7 during the light supplement operation of the inspection robot 1 is recorded. The noise is analyzed in the frequency domain and the decibel range using software, and the sound spectrum diagram is obtained, as shown in Figure 5 (a), Figure 5 (b), and ​As shown in (c), the three pictures respectively represent the 2700K light supplement group, the 6500K light supplement group and the non-light supplement group. The results show that under three different experimental conditions, the noise decibel of the control group without light supplement is the lowest, the noise decibel of the 2700K light supplement group is the highest, and the noise decibel of the 6500K light supplement group is between the two, indicating that the stress caused by the 6500K light supplement group to the laying hens 7 is smaller than that of the 2700K light supplement group.

[0042] In the application of actual laying hens 7 breeding, the application uses 6500K blue light component to supplement light for the laying hens 7, which can reduce the secretion of chicken corticosterone CORT of the laying hens 7, reduce the stress level of the laying hens 7, and regulate the secretion of hormones such as serum glutamine Gln and superoxide dismutase SOD, so as to improve the stress level of the laying hens 7, and also maintain the follicle stimulating hormone FSH and estradiol E2 of the laying hens 7, without affecting the egg production rate. The stress level of the laying hens 7 after being irradiated by the cold white light source 2 on the inspection robot 1 is the same as or less than the preset stress threshold value. The egg production rate of the laying hens 7 after being irradiated by the cold white light source 2 on the inspection robot 1 is the same as or less than the preset egg production rate threshold value. In specific implementation, the preset egg production rate threshold value is set to 90%. The application discloses the correlation mechanism between the light supplement color temperature condition and the stress level of the laying hens 7, and by using the special light color temperature as the light supplement source 2, the stress level of the laying hens 7 is significantly reduced, and the egg production rate is not affected.

[0043] In combination with the actual production scene, when the breeder intends to introduce the inspection robot 1 to conduct the henhouse inspection, the light color and light intensity of the light supplement can be adjusted in advance, the ability of the poultry to resist fear stress is increased, the adverse effects of stress on the production and development of the poultry are reduced as much as possible, the light supplement scheme designed by the application is combined with the poultry breeding management, the anti-stress cost is controlled, the secondary stress caused by the inspection robot 1 itself is avoided, and the poultry is also helped to relieve the oxidative stress of the liver and other tissues, and the animal welfare requirement in the poultry breeding process is strengthened. In specific implementation, the application also sets a reasonable light environment, such as light intensity, cycle and the like, and evaluates the indexes for expressing the stress degree of the broiler chicken under stress, such as blood plasma biochemical parameters, sound indexes, egg production, body temperature data and the like. The application provides protection for improving the animal welfare in the poultry breeding stage, gives the stress caused by the light supplement to the laying hens 7 when the current large-scale breeding environment uses the inspection robot 1 but does not pay attention to the light supplement, and gives an improved solution.

[0044] The method can effectively reduce the negative influence of the stress of the laying hens 7 caused by the light supplement operation of the inspection robot 1, improve the levels of antioxidant enzymes and immune compounds, reduce oxidative metabolites, reduce the content of active oxygen products in the body to reduce the stress response of the body, reduce oxidative stress damage, help to improve the stress level of the laying hens 7, and increase industrial economic benefits, by using the color of the light supplement of 6500K.

[0045] The method of the present application is directed to the problem that light supplement in the henhouse inspection can aggravate the stress of the laying hens 7, color temperature-hormone response correlation is carried out, and a light supplement parameter constraint rule is proposed. The light source 2 with a color temperature of 2700K or 6500K and an intensity of 20lx is installed on the side of the inspection robot 1, and the light source 2 is used to perform two fixed-point light supplements (single exposure 2s) at a cruising speed of 20cm / s at 10:00 and 16:00 every day. The enzyme-linked immunosorbent assay (ELISA) is combined with the detection of serum glutamine Gln, superoxide dismutase SOD, and corticosterone CORT, and other stress markers, and follicle stimulating hormone FSH and estradiol E2 to construct a multi-index evaluation system. The experiment shows that, compared with the traditional 2700K warm white light supplement group, the serum glutamine Gln of the 6500K light supplement group decreases by 13.2% (P<0.01), the superoxide dismutase SOD decreases by 23.0% (P<0.0001), and the corticosterone CORT decreases by 33.4% (P<0.001). At the same time, the experiment shows that, compared with the non-light supplement group, the serum glutamine Gln of the 2700K warm white light supplement group increases by 112.1% (P<0.001), the superoxide dismutase SOD increases by 21.8% (P<0.001), the follicle stimulating hormone FSH increases by 27.1% (P<0.01), the estradiol E2 decreases by 35.5% (P<0.05), and the corticosterone CORT increases by 28.6 (P<0.001). There is no significant difference in the hormone indexes between the 6500K light supplement group and the non-light supplement group, which indicates that the light supplement of the 6500K group causes lower stress to the laying hens than the non-light supplement group, effectively improves the stress level and does not affect the egg production rate. The present application has the dual advantages of image acquisition quality optimization and animal welfare guarantee, and provides reliable technical support for intensive breeding.

[0046] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to the embodiments once they know the basic creative concept. Therefore, the present application intends to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0047] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the application can be practiced otherwise than as specifically described.

Claims

1. A low-stress light supplementing method for a henhouse inspection robot, characterized by, The application relates to a cold white light source (2) installed on an inspection robot (1), wherein when the inspection robot (1) is used to inspect each layer type chicken cage (6) in a chicken house, the cold white light source (2) is used to irradiate the chickens in each layer type chicken cage (6) passed by the inspection robot (1) in turn to perform low stress light compensation for the chickens. The color temperature of the cold white light source (2) is 5500K-6500K. The light intensity of the cold white light source (2) is 20 lx. The chickens in each layer type chicken cage (6) in the chicken house are all egg laying hens (7) in an egg laying period. After the egg laying hens (7) are irradiated by the cold white light source (2) on the inspection robot (1), the serum glutamine Gln, superoxide dismutase SOD, chicken corticosterone CORT, follicle stimulating hormone FSH and estradiol E2 of the egg laying hens (7) have no significant difference compared with the case without light compensation by the inspection robot (1), and the stress level and egg laying rate of the egg laying hens (7) have no significant difference. The start time of the irradiation of the cold white light source (2) is a preset first time point in the morning and a preset second time point in the afternoon every day, and the duration of each irradiation of each layer type chicken cage (6) is the same. The cold white light source (2) is an incandescent lamp, a light emitting diode (LED) lamp, an organic light emitting diode (OLED) lamp, a quantum LED lamp or a fluorescent lamp.

2. The low-stress light supplementing method of claim 1, wherein: The stress level of the egg laying hens (7) after irradiation by the cold white light source (2) on the inspection robot (1) is the same as or less than a preset stress threshold compared with the case without light compensation by the inspection robot (1).

3. The low-stress light supplementing method of claim 1, wherein: The egg laying rate of the egg laying hens (7) after irradiation by the cold white light source (2) on the inspection robot (1) is the same as or less than a preset egg laying rate threshold compared with the case without light compensation by the inspection robot (1).

4. The low-stress light supplementing method of claim 1, wherein: The inspection robot (1) is uniformly inspected at a constant speed to monitor the egg laying hens (7) in each layer type chicken cage (6) by a camera (4) on the inspection robot (1) in real time.

5. The low-stress light supplementing method of claim 1, wherein: The size of each layer type chicken cage (6) in the chicken house is the same.

6. The low-stress light supplementing method of claim 1, wherein: ​

Images