Abstract: The invention discloses a modulator, a demodulator and a wireless communication system. The wireless communication system comprises a modulator and a demodulator. The modulator is suitable for generating a target linear frequency modulation signal, wherein the target linear frequency modulation signal is a signal of which the frequency is varied linearly over time, wherein the phase of the target linear frequency modulation signal is determined by an initial frequency and a frequency stepping of the target linear frequency modulation signal, and the frequency stepping is determined by the bandwidth of the target linear frequency modulation signal and the spreading factor of the target linear frequency modulation signal. The demodulator is suitable for demodulating the target linear frequency modulation signal. According to the scheme, power consumption can be reduced while long-distance signal transmission is realized.

Abstract: A method and system for monitoring the egg-laying performance of caged laying-hens at laying-hen positions are provided. A plurality of coops are disposed side by side, a conveyor belt is disposed below the plurality of coops, and a machine-vision inspection device having a CCD camera and a lighting device is provided on an output end of the conveyor belt. Eggs laid by the hens fall onto the conveyor belt from the bottom of the coops. After all eggs are laid, the conveyor belt is activated to convey the eggs to the machine-vision inspection device, and the CCD camera is triggered to capture an image of a surface of the conveyor belt carrying the eggs.

Abstract: A lighting experimental system and a lighting experimental method for reducing the ability of the poultry to recognize the red objects are provided, wherein wooden testing box is provided with an opening at the top thereof, a square adjustable light-emitting diode (LED) light source is disposed directly above the opening of the wooden testing box, a first black backdrop is fixedly laid on a surface of each inner wall of four sides of the wooden testing box, a horizontal trough is provided at the bottom of the wooden testing box, a feed box is disposed in the horizontal trough, and the feed box is connected to an electric push rod; two color photographic papers are fixed on an inner wall, directly above the horizontal trough, of the wooden testing box, pressure sensors are disposed between the color photographic papers and the inner wall of the wooden testing box.

Abstract: A lighting experimental system and a lighting experimental method for reducing the ability of the poultry to recognize the red objects are provided, wherein wooden testing box is provided with an opening at the top thereof, a square adjustable light-emitting diode (LED) light source is disposed directly above the opening of the wooden testing box, a first black backdrop is fixedly laid on a surface of each inner wall of four sides of the wooden testing box, a horizontal trough is provided at the bottom of the wooden testing box, a feed box is disposed in the horizontal trough, and the feed box is connected to an electric push rod; two color photographic papers are fixed on an inner wall, directly above the horizontal trough, of the wooden testing box, pressure sensors are disposed between the color photographic papers and the inner wall of the wooden testing box.

Abstract: A method and system for monitoring the egg-laying performance of caged laying-hens at laying-hen positions are provided. A plurality of coops are disposed side by side, a conveyor belt is disposed below the plurality of coops, and a machine-vision inspection device having a CCD camera and a lighting device is provided on an output end of the conveyor belt. Eggs laid by the hens fall onto the conveyor belt from the bottom of the coops. After all eggs are laid, the conveyor belt is activated to convey the eggs to the machine-vision inspection device, and the CCD camera is triggered to capture an image of a surface of the conveyor belt carrying the eggs.

Abstract: The invention discloses a modulator, a demodulator and a wireless communication system. The wireless communication system comprises a modulator and a demodulator. The modulator is suitable for generating a target linear frequency modulation signal, wherein the target linear frequency modulation signal is a signal of which the frequency is varied linearly over time, wherein the phase of the target linear frequency modulation signal is determined by an initial frequency and a frequency stepping of the target linear frequency modulation signal, and the frequency stepping is determined by the bandwidth of the target linear frequency modulation signal and the spreading factor of the target linear frequency modulation signal. The demodulator is suitable for demodulating the target linear frequency modulation signal. According to the scheme, power consumption can be reduced while long-distance signal transmission is realized.