72 results about "Dark period" patented technology

The present invention describes an optical distance measuring device having a pulsed radiation source that is implemented to transmit, in a temporally contiguous radiation pulse period, a radiation pulse having a pulse duration t_p that is shorter than the radiation pulse period, and to transmit no radiation pulse in a temporally contiguous dark period. Further, the optical distance measuring device includes a detector for detecting different amounts of radiation in two overlapping detection periods during the radiation pulse period to capture reflections of the radiation pulse at an object surface and a background radiation and/or in two overlapping detection periods during the dark period to capture background radiation. The optical distance measuring device further includes an evaluator determining a signal depending on a distance of the optical distance measuring device to an object based on the detected amount of radiation. Further, the present invention provides a method for optical distance measurement and for multiple sampling.

Unwanted signal components in time-division multiplexed (TDM) systems may lead to crosstalk and noise if these pulses overlap with signal pulses from an interrogated sensor. The crosstalk and noise are dominated by interference between the signal pulses from the interrogated sensor and the unwanted signal components and can be greatly reduced by suppressing this interference signal. The unwanted signal components may include overlapping pulses originating from different sets of interrogation pulses (repetition periods). Modulating the phase or frequency between the repetition periods so that the unwanted interference signal does not appear at frequencies from which the phase of the interrogated sensor is demodulated suppresses this interference. Other unwanted signal components include leakage light during dark periods of the duty cycle of an interrogation signal. Modulating the phase difference between the interrogation signal and the leakage light suppresses the interference between the leakage light and the interrogation signal.

The disclosed plant cultivation method and lighting device can repel insects while also controlling the flowering reaction or avoiding delaying the flowering of short-day plants such as chrysanthemums. Said method uses illumination from a plurality of light sources, each of which emits light having a peak wavelength in the red-to-green region. Each light source goes through a synchronized or independent flashing pattern in which the emission intensity changes cyclically, each cycle consisting of a bright period with a prescribed width and a dark period with a prescribed width, the dark period having a lower time-average brightness than the light period. The duty cycle of the flashing pattern, as defined by formula (1), is at most 50%. (1) Duty cycle = width of bright period / (width of bright period + width of dark period) 100% In at least part of the region illuminated by a plurality of light sources, the combination of the illumination patterns from said plurality of light sources produces an insect-repelling effect.

The invention discloses a method for regulating and controlling the flowering period of a potted flowering peach, belonging to the technical field of flower culture. The method comprises the following steps of: selecting a potted flowering peach plant with full flower buds; refrigerating at 4-6 DEG C for 3-8 weeks to break the dormancy of the flower buds; and then carrying out flower forcing treatment. A flower forcing treatment method comprises the following steps of: placing under the sun for 12-14 hours every day at the illumination intensity of 3000-8000 lx; and placing in the dark for 10-12 hours every day, wherein the temperature during an illumination period is 20-25 DEG C, the temperature during the dark period is 8-13 DEG C, and the relative humidity is 65-85 percent. The potted flowering peach can be viewed and admired when the flower forcing treatment is continued till a flower bud is in bud or in bloom. The method can ensure that the potted flowering peach flowers 1-2 months in advance and has proper flower and leaf proportion, thereby greatly enhancing the ornamental value and the commodity value of the flowering peach.

The invention discloses a high-concentration sewage treatment method. The method includes the steps: firstly, using an electrochemical oxidation method for pretreatment of sewage to obtain pretreated sewage; and secondly, adjusting the pH (potential of hydrogen) value of the pretreated sewage to range from 7.0 to 9.0, inoculating microalgae into the sewage, and subjecting the sewage to microalgaebiological treatment so as to purify the sewage, wherein the microalgae biological treatment operating conditions include: the temperature ranges from 25 DEG C to 30 DEG C, the light dark period is 12:12, the illumination intensity ranges from 40001ux to 60001ux, and the steps include aerating or mechanically stirring and continuously culturing for ten to twenty days. By the high-concentration sewage treatment method, sewage treatment cost is reduced, pollutant removal efficiency is improved. Further, the high-concentration sewage treatment method is wide in sewage treatment range, free of secondary pollution and flexible and controllable in operation mode, and environment-enhancing energy is realized.

The invention discloses a method for improving the quality of foliage vegetables by utilizing short-term continuous illumination. The method comprises a step of continuously illuminating vegetables for 2 to 5 days before the vegetables are harvested so as to increase the accumulation of soluble sugar and vitamin C (Vc) nutrient substance inside the vegetables and reduce the content of nitrate, wherein the vegetables can be soilless cultivated or soil cultivated vegetables. The continuous illumination is that: the illumination process is continuously performed and no alternation of a light period and a dark period exists; and a mode that an artificial light source provides the continuous illumination or the natural illumination is utilized in the daytime and the artificial light source is adopted for light supplement at night can be adopted. The artificial light source is the traditional electric light source, and is preferably one or a combination of more of a high-pressure sodium lamp, a fluorescent lamp, a filament lamp, a red light-emitting diode (LED) light source and a red and blue LED combined light source. The illumination intensity in the method is not lower than 100mu mol.m<-2>.s<-1>. In the method, the simple continuous illumination is utilized to realize the short-term quality regulation and control of the foliage vegetables, change the ingredient content of vegetables sold on the market, increase the accumulation of the soluble sugar and the Vc nutrient substance which are useful to human bodies, and reduce the content of the nitrate at the same time; and the method is simple and has reliable results.

The present invention provides a cultivation method for illuminating plants at night or in a lightless environment. For the illumination, the exit light has an emission peak wavelength in the green to red region and flashes with a flashing pattern of prescribed light period duration and dark period duration. For the flashing, the duty cycle given by formula (1) is 50% or less, wherein the formula (1) is duty factor (%)=light period duration/(light period duration + dark period duration) x 100. Also provided is a cultivation method that controls the blooming of short-day plants such as chrysanthemums while providing insect-screening effects such as mothproofing.

Applicant has disclosed a method for controlling on and off times for streetlights by synchronizing these intervals to recent local daylight conditions without any human intervention. The preferred method comprises: sensing, via a photocell, when dusk and dawn occurs; and then, timing or counting the dusk and dawn times per 24-hour cycle, recording that dusk and dawn data, calculating the average dusk-to-dawn interval for a plurality of preceding 24-hour cycles; predicting, the next dusk time; and turning on the streetlight for a preselected percentage of the calculated average dusk-to-dawn interval. Future “on” time periods are repeatedly calculated as a percentage of the dark periods determined on one or several immediately prior nights, and so varies with the seasons. Unlike the prior art, Applicant's streetlight control does not require field programming or field inputs from the installer or time knowledge. It also does not require any external or internal precision clock or calendar.

The invention discloses a method for controlling the flowering period of potted rhododendrons. In November of each year, potted rhododendron plants with full flower buds are selected and refrigerated at 4-6°C for 5-10 weeks to break the dormancy of their flower buds; after the dormancy is broken, the rhododendron plants need to be placed in 10 days of environmental transition at 18-20°C during the day and 8-12°C at night to promote the recovery of the root system from the dormant state to absorb water as soon as possible; Described flower forcing treatment is 10~12 hours of light every day, light intensity 5000~8000lx, 12~14 hours of darkness every day, temperature 22~25 ℃ during light period, temperature 10~14 ℃ during dark period, relative humidity is 50%~70%. The method of the invention can make the potted Rhododendron bloom in January to February (meeting the flower appreciation during New Year's Day and Spring Festival), and the proportion of flowers and leaves is appropriate, and has high ornamental value and commodity value.

The invention discloses a method for increasing the germination rate of Hypericum ascyron seeds. The method comprises the following steps: preparing mature Hypericum ascyron fruits, naturally drying in the shade, removing shells, and removing impurities by virtue of an air blast method, so as to pick out pure seeds; soaking the seeds in a 1% sodium hypochlorite solution for 15-20 minutes, flushing the seeds with clean water, and airing the surface moisture of the seeds; soaking the aired seeds in a 0.1mM-0.3mM gibberellins solution for 20-24 hours, taking out the seeds, flushing the seeds with clean water, and carrying out wet preservation on the seeds at 2-5 DEG C for 3-4 weeks; and after the wet preservation, carrying out germination accelerating on the seeds in an incubator, wherein the temperature is 15 DEG C, the light-dark period is that 12-hour illumination and 12-hour dark are alternate, and the culturing time is 25-30 days. By virtue of the method, the germination rate of the Hypericum ascyron seeds can be substantially increased, the artificial breeding difficulty is reduced, and the large-scale planting of Hypericum ascyron is realized.

The invention discloses an application of ethyl myristate as a sex attractant for luring loxostege sticticalis. Furthermore, the invention provides a sex attractant for luring loxostege sticticalis, wherein loxostege sticticalis is taken as an active component of the sex attractant. The sex attractant, combined with a gas chromatography-mass spectrometer (GC-MS), a gas chromatography-electroantennogram measuring system (GC-EAD) and series behavior tests, carries out a chemical identification for sex pheromones of loxostege sticticalis population in China, and implements a field luring test for male moths. Research results show that by taking the ethyl myristate as a sex attractant for luring the release of female moths of loxostege sticticalis, the female moths, in a dark period of the 3rd day after eclosion, are under a calling state, and sexual glands stretch out of tail ends of the abdomens to release sex pheromones so as to attract the male moths to mate. The research achievement will provide a theoretical basis for the application of sex pheromone in insects monitor, prevention and control of loxostege sticticalis in China, so as to effectively prevent disaster caused by loxostege sticticalis on the husbandry in Northern China.

The invention belongs to the technical field of plant culture, and relates to a method for regulating the flowering period of calothea zebrina, 90 days before the expected flowering are taken as an induced flowering period, illumination time is kept for 10 hours every day in the induced flowering period, and the illumination intensity in the light period is kept between 15000lux and 20000lux, the dark period is 14 hours each day, and the calothea zebrina is uninterruptedly treated for 90 days; in addition, the calothea zebrina is irrigated with a mixed liquor composed of 7200 times of micronutrient fertilizer with the trade name of STEM and 1000 times of potassium dihydrogen phosphate with EC equal to 1.0-1.5 each week during the induced flowering period, the temperature is kept at 22-28 DEG C by day and 21-23 DEG C at night, and the humidity is always kept between 75% and 85%. The method can cause the calothea zebrina to flower out of season.

A scanner unit includes, a CIS module having a light source unit, and a CIS which receives reflected light which is emitted in the light source unit; a carriage motor which is provided in the vicinity of the CIS module, and operates along with heat when reading out using the CIS module; a determination unit which determines whether or not dark period measurement data read out using the CIS module in a dark period is in a predetermined range of a reference dark period which is set corresponding to a temperature of the carriage motor; and a control unit which controls the carriage motor so as to limits an operation of the carriage motor in read processing, when the dark period measurement data is not in the range of the reference dark period.

The invention discloses an air-conditioning system of a closed artificial light plant factory. The air-conditioning system comprises an artificial light source, an artificial light source heat reclaiming device, a timing controller and a heat reclamation air-conditioning unit; the timing controller controls on and off of the artificial light source, the artificial light source is turned off at daytime to form a dark period of plant growth, and the artificial light source is turned on at night to form a light period of plant growth; the artificial light source heat reclaiming device absorbs the heat of the artificial light source, then the heat is absorbed by the heat reclamation air-conditioning unit, and the heat is supplied to the plant factory through an air treatment unit; and the heat reclamation air-conditioning unit and the air treatment unit are controlled by the controller. The timing controller controls the artificial light source to be turned on and off alternately at daytime and night, so that cold load at daytime is reduced, cold load at nigh is increased, the utilization rate of the air-conditioning unit is improved, the installed capacity is reduced and the initial investment is reduced.

The invention discloses a green fluorescent material for an alternating current - light-emitting diode (AC-LED) and a preparation method thereof. A constitution general formula of the green fluorescent material is (M1-x-yIxEuy) Al2O4, wherein the x is larger than 0 and smaller than or equal to 0.04, and the y is larger than 0 and smaller than or equal to 0.05. In a compound processing of the fluorescent material, H3BO3 and rare earth elements are added in combination mode, half-mixed-phase Sr4Al14O25 of a SrAl2O4 material can be effectively restrained, and luminous intensity is obviously improved. Appropriate afterglow of the fluorescent material is matched with alternating current driving LED chips to pack white light LEDs. By means of the afterglow of the fluorescent material, a dark period of the alternating current LED between two times of continuous lightening is offset, and the problem of sparking of the alternating current LED is eliminated.

A walking cane is provided having an elongated length, a handle grip, a forward-directed illumination source, and an ambient light sensor. The device provides a cane-user with forward illumination during twilight and dark periods, whereby the ambient light sensor operably energizes the light source when in an appropriate operational mode. A secondary mode allows the user to manually operate or deactivate the light source by hand controls, wherein each option is selectable from a three-way switch at the base of the handle grip. The length of the cane may be adjustable and its structure may take on an ergonomic shape, while the lower distal end is capped with a cane ferrule.

The invention discloses a method for regulating the flowering period of golden flower maranta. The dark period is 14 hours each day, the light period is 10 hours each day, and the treatment lasts 90 days continuously; in the induced flowering period, the temperature is kept at 26-28 DEG C by day and 24-25 DEG C at night, the humidity is kept at 75-85% by day and about 90% at night, and the illumination intensity is kept at 18000-20000lux in the light period; in the first month of the induced flowering period, mixed aqueous solution prepared from 0.4g/L phosphate fertilizer, 0.2g/L potassium fertilizer and No.1 Peters with EC equal to 1.5 is watered in potting soil, once every 5-6 days, after the short-day treatment is carried out for 90 days, another mixed aqueous solution prepared from 0.1g/L phosphate fertilizer, 0.15g/L potassium fertilizer and No.1 Peters with EC equal to 0.5-0.8 is watered in the potting soil, once every 5-6 days, the temperature is kept at 23-25 DEG C by day and 20-22 DEG C at night, which lasts 45 days.

The invention discloses a red illumination method for prompting the mating and oviposition of artificially bred dichocrocis punctiferalis. The method specifically includes the following steps that: temperature in an insectary is controlled in a range of 24 to 26 DEC C, and relative humidity in the insectary is controlled in a range of 40 to 60%, and a common fluorescent lamp is adopted to provide a light source, so that the alternation of day and light can be controlled, and the ratio of the illumination duration of the day to the illumination duration of the light is 15:9; 15% sucrose water is provided for supplementing nutrition for the adults, an apple wrapped with medical gauze is suspended at the top of a cage so as to provide a place for the oviposition of the females; the gauze can be taken off regularly, so that ovums can be obtained; the interior of the insectary is regularly disinfected and is kept ventilating; and in the dark period of a light cycle, a red fluorescent lamp is adopted as a light source, and the fluorescent lamp is suspended right above the cage by 10cm, and the illumination intensity of the four corners of the bottom of the cage is not lower than 2lux assuredly, and illumination time lasts for 9 hours assuredly, namely, red illumination is always provided in the dark period. According to the method, red illumination is provided in the breading period of the adults so as to simulate the natural spectrum at dusk and dawn, and therefore, the dichocrocis punctiferalis can be promoted to mate and oviposit, and breeding effects can be improved. The method is worthy of promotion and use.

The invention relates to a cluster-type segment propagation method of potato test-tube plantlets. The method comprises the following steps: preparing a simplified MS culture medium, adding agar powder and sucrose in the amounts of 6 g/liter and 30 g/liter respectively, and adjusting the pH value to 5.8; packaging the resulting culture medium in a culture bottle respectively and sterilizing for 20 minutes in an autoclave at 121 DEG C; taking all the test-tube plantlets of another culture bottle, cutting off the plantlets at the same time by using a pair of sterilized scissors according to the internode positions of the plantlets, and transferring to the prepared culture bottle, wherein each bottle of plantlets is distributed in four new culture bottles and the stem segments in each culture bottle are 1.3 to 1.5 times of the plantlets; laying out the stem segments transferred to the new culture bottles; placing the sealed culture bottles in an incubator house for culture under such conditions that the temperature is in the range of 20 DEG C to 22 DEG C, the illumination period is 16 hours, the dark period is 8 hours and the culture period is 22 to 25 days; and repeating the previous steps until the desired yield is obtained.

Strawberries are available year-around from production in the field or from controlled environments (e.g. high and low tunnel culture and greenhouse). Diversity of production conditions results in challenges in controlling diseases before, during, and after harvest. Fungicides, traditionally used to control diseases, have limitations. UV-C irradiation followed by a dark period was used to kill two major pathogens of strawberry, Botrytis cinerea and Colletotrichum acutatum. The UV-C irradiation and dark period was followed by repopulation with beneficial biocontrol microorganisms. The 4 hr dark period prevented activation of a light-dependent UV-C damage repair mechanism in the pathogens. This combination protocol makes it possible to use a lower dose of UV-C for reduction and/or elimination of pathogens. A mobile treatment apparatus was designed to provide the appropriately timed UV-C doses, dark period, and sprayable doses of biocontrol microorganisms. The UV-C dose and repeated exposure did not affect pollen germination or cause chlorophyll degradation in strawberry leaves.

The invention provides a method for producing natural carotenoids by culturing of Scenedesmus obliquus New which is newly domesticated scenedesmus obliquus. The method includes that yellow serofluid pretreatment, pH adjustment, adding of rich-selenium culture (obtained from 'the world selenium city' Enshi), sterilization and lateral lighting culture with red-light lamp tubes on two sides are performed; carotenoid induction is carried out through methyl jasmonate, top-lighting blue light 7600lux in light-dark period of 21h:3h, temperature stimulation at 32-37 DEG C, nitrogen starvation, glucoseand xylose; algae cell low-temperature high-pressure homogenization wall breaking or ultrasonic-assisted extraction of carotenoids is performed to prepare a dried product of rich-selenium carotenoids. In consumption of per gram of scenedesmus obliquus in dry weight, 123.12mg of the dried product of Scenecarotenoid which is novel rich-selenium natural carotenoids can be obtained. The method is remarkably helpful to production of novel products of rich-selenium natural carotenoids, and a promising development prospect and an extremely high market value are achieved.

The invention relates to a tobacco cultivation method based on the light environment. The method comprises the following steps of step (1), disinfection of tobacco seeds; step (2), tobacco seed culture; step (3), transplanting; step (4), dark period culture; step (5), lighting treatment; step (6), nutrient solution adjustment; step (7), topping and branch removing. Compared with traditional fluorescent lamp spectrum, the method increases the yield of tobacco leaves by at least 35% when other growth conditions are maintained and the light intensity is the same. The method covers the whole process of the tobacco leaves from planting to harvesting in a plant factory, the whole process is carried out indoors, the tobacco leaves are completely unaffected by the external environment, and continuous production can be achieved throughout the year. The method can make tobacco plants thrive and develop rapidly, and the root system is sound and developed.

The invention relates to an evaluation method and an evaluation device for the shapes of surfaces, wherein the evaluation method comprises the steps of irradiating a pattern with a periodic bright-and-dark period on the first surface of an object to be evaluated; receiving the light-receiving pattern reflected by the first surface; averaging the area of the above pattern on the first surface corresponding to the bright-and-dark period so as to detect the deflection of the pattern within the bright-and-dark period.

The invention discloses a method for restraining plant vain growth through an LED lamp. The method is implemented by using the LED red light to carry out multipoint interruption to the dark period of the plant growth every 1 to 4 hours; the used light intensity is 10 to 200 Mu mol/m<2>*s<-1>, and the lighting time is 5 to 20 minutes. The method for restraining plant vain growth through the LED red light has the advantages that the problem that young seedling vain growth is easily caused by poor lighting environment and hot and humid environment for growing seedlings in a facility greenhouse is solved; therefore, compared with the conventional method that the vain growth is restrained through a plant growth regulator, the method provided by the invention suits the purpose of develop green organic agriculture on one hand and provides a theoretical basis for the industrialized seedling production and the development of a plant factory on the other hand.

An apparatus for taking moving pictures, a method for taking moving pictures, and a novel pixel sensor array are disclosed. The apparatus includes a rectangular imaging array, a plurality of column processing circuits, and a controller. The rectangular imaging array is characterized by a plurality of rows and columns of UHDR pixel sensors and a plurality of readout lines, and a plurality of row select lines. Each column processing circuit is connected to a corresponding one of the plurality of readout lines. The controller causes the rectangular imaging array to measure a plurality of images of a scene that is illuminated by a pulsating light source characterized by an illumination period and a dark period. Each of the images is generated in a frame period which includes an exposure period and a dead period, the dead period being less than the dark period.