SU1273893A1 - Device for controlling illuminance - Google Patents

Abstract

The invention relates to the field of automatic control of microclimate and, in particular, can be used to control the illumination in greenhouses and greenhouses. The aim of the invention is to simplify the device and increase its reliability. The device contains inverters 1 and 8, timer 2 with a setting input, functional converter 3 illumination - frequency of pulses, elements 4, 4, 7 and 10, reversible counter 6, D-flip-flop 9, controller 11, c 9 actuator 12, 1 il. CO 00 with co

Description

The invention relates to automatic control of the microclimate and, in particular, can be used to control illumination in greenhouses and greenhouses.

The purpose of the invention is to simplify the device and increase the ex? reliability.

The drawing shows a block diagram of a device.

The device comprises a first inverter 1, a timer 2 with a setting input, a light intensity functional converter - pulse frequency, first and third elements 4 and 5, a reversible counter 6, a second element 7, a second inverter 8, a D-trigger 9, a fourth element 10 , regulator 11, actuator 12.

The device operates as follows.

Timer 2, consisting of a stable generator and a frequency divider, generates pulses: duration of daylight coming from the second output and corresponding to the level of normal illumination, and second pulses coming from the first output, determining the operation mode of the reversible counter 6. When the device is turned on, timer 2 generates the pulse of the installation of the D-trigger 9 and the reverse counter 6 in the initial state.

From the third output of timer 2, minute pulses are removed. When signal_ at the third output of timer 2, the reverse counter 6 operates with the summation mode. In this case, at the input of the And 5 element, signal 1 is set, which allows the passage of pulses with a frequency corresponding to natural illumination, to the summing input of the reverse counter 6 from the functional converter 3. At the same time, at the input of the And 5 element, the signal 0 prohibits the recording of pulses into the reverse counter 6 from the functional converter 3, and at the input of the element And signal 1 is set, allowing the passage of pulses with a frequency corresponding to the level of normal illumination, from the first output of the timer 2 n subtracting input of down counter 6. After closure period subtracting the contents down counter 6 characterizes the difference between the natural and normal luminance, i.e., irradiation.

If the natural illumination is greater than normal, the contents of the reverse counter 6 is greater than zero. Additional illumination is not performed at this time, since 5 from the second output of the multi-input element And 0 is input to the D-trigger 9 input. Information is recorded from the D-input to the trigger 9 by sync pulses from the third output tai * 0 measure 2.

If the reversible counter 6 is zeroed during the subtraction period, then signal 15 receives 0 from the first output of the And 7 element to the input of the And 4 element, prohibiting the passage of pulses from timer 2 to the subtracting input of the reversing counter 6.

If the natural illumination is higher than normal during the light of 70 days (signal 1 comes from the second output of timer 2 to the input of element 10), the lamps turn on only after the reversible • counter 6 is reset, since the pulses 75 coming from functional converter 3 , will have a lower frequency than the pulses from the first output of timer 2. The accumulated excess on the reverse counter 6 with 30 time will be exhausted to zero. The signal 1 ”from the output of element 7 through the inverter 1 is fed to the D-input of trigger 9, which, according to the clock pulse at C ~, writes the signal J5 1 to the output. At the output of element And 10, signal 1 is set and controller 11 receives the Turn on lamps command.

Claims (2)

The invention relates to the automatic regulation of the microclimate and, in particular, can be used to control the illumination in greenhouses and greenhouses. The purpose of the invention is to simplify the device and increase erfr reliability. The drawing shows a block diagram of the device. The device contains the first inverter 1, timer 2 with the installation input, functional converter 3 illumination - pulse frequency, first and third elements I 4 and 5, reversible counter 6, second element I 7, second inverter 8, D-flip-flop 9, fourth element I 10, controller 11, actuator 12. The device operates as follows. Timer 2, consisting of a stable oscillator and frequency divider, generates pulses; the duration of the light day, coming from the second output and corresponding to the level of normal illumination, and second pulses from the first output determine the operating mode of the reversing counter 6. When the device is turned on, timer 2 generates a pulse of the D-flip-flop 9 and reversible counter 6 condition. Minute pulses are removed from the third output of timer 2. With signal 1 at the third output of timer 2, the reversible counter 6 operates in the summation mode. At the same time, at the input of element 5, a signal is set that permits the passage of pulses with a frequency corresponding to natural lightness to the summing input of the reversible counter 6 from the functional converter 3. At the same time, the signal O arrives at the input of the element 5, prohibiting the recording of pulses into the reverse counter 6 from the functional converter 3, and at the input of the element I 4 a signal 1 is set, allowing the passage of pulses with a frequency that corresponds to the level of normal illumination, from the first time out pa 2 to the subtracting input of down counter 6. After completion period subtracting the contents of down counter 6 hgarakterizuet difference of between the natural and normal luminance, i.e. irradiance If the natural brightness is more than normal, the contents of the up / down counter 6 are greater than zero. At this time, no highlighting is performed, since the second output of the multi-input element I is received at the input of the D-flip-flop 9. Information from the D-input to the flip-flop 9 is generated by clock pulses from the third output of timer 2. If the reversing counter 6 is reset during the subtraction period then from the first output of the element I 7 to the input of the element I 4 a signal O is received, prohibiting the passage of pulses from timer 2 to the subtractive input of the reversible counter 6. If the natural illumination is higher than normal during the light day (from the second output yes timer 2 to the input element And 10 receives a signal 1), the inclusion of the lamp occurs only after the reversible counter 6 clears, because the pulses coming from the functional converter 3 will have a lower frequency than the pulses from the first timer output 2. The accumulated surplus on the reversible counter 6 will eventually run out to zero. The signal 1 from the output of the element 7 through the inverter 1 is fed to the D input of the trigger 9, which writes a signal 1 at the C input input. At the output of the And 10 element, a signal 1 is set and the On lamp control is sent to the regulator 11. Claims An illumination control device comprising a series-connected timer with a setup input, a first element AND, a reversible counter and a second element AND whose output is connected to the second input of the first element I through a first inverter and a series-connected functional converter illuminance - pulse frequency and the third .I element, connected to the second input of the reversible meter, and the serial circuit from the fourth element I, which is also connected to the second output of the timer, is regulated pa actuator otichayuschee that, with tseyu simplify the device and increase of reliability, further to it 312738934 A second inverter and a D-flip-flop are introduced; the vert and D-flip-flop are connected to the corresponding C input of which is connected to the input to the third input of the first second inverter, to the second input of the And element and to the second input of the fourth and third Element And - input D is triggered by a timer, and the outputs of the second one j Pa are connected to the output of the second element AND