CN211720789U

CN211720789U - Cabin lighting potentiometer circuit and cabin lighting control device

Info

Publication number: CN211720789U
Application number: CN201922106966.4U
Authority: CN
Inventors: 毕炜桐; 李西柱; 段士龙; 杨磊
Original assignee: Shanghai Aviation Electric Co Ltd
Current assignee: Shanghai Aviation Electric Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-10-20
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to a cabin illumination potentiometer circuit, cabin lighting control device include, potentiometer power supply reference unit, first voltage follower, second voltage follower and potentiometer. The utility model has the advantages that: the problem that when a pure hardware circuit is used for adjusting the illumination brightness of the seat cabin, a brightness dimming curve adaptive to human eye perception is configured in a certain interval of the potentiometer supply voltage is effectively solved, and the approximately linear change of the brightness in the interval is avoided.

Description

Cabin lighting potentiometer circuit and cabin lighting control device

Technical Field

The utility model relates to a passenger cabin illumination dimming system, passenger cabin illumination potentiometer circuit, passenger cabin lighting control device.

Background

Currently, in aircraft cockpit lighting dimming systems, the slope of the dimming curve is different from day to night in order to give the driver a comfortable lighting dimming experience during the day and night. Because the surrounding environment at night is dark, human eyes are sensitive to the brightness of the light, and the human eyes can feel large difference due to small brightness change; however, the brightness of the surrounding environment is strong in the daytime, and the human eyes can feel the difference only when the brightness changes greatly. Therefore, the existing illumination dimming curve of the airplane cockpit is more suitable for the sensory experience of human eyes, and the change of the brightness of the lamplight is slower when the potentiometer Rs is adjusted under the condition of low brightness at night; under the condition of high brightness in daytime, the brightness of the lamp changes obviously when the potentiometer Rs is adjusted, so that the dimming curve changes in an exponential form.

However, in the illumination of the aircraft cockpit, the voltage value of the dimming curve is generally adjusted from 0V to the power supply voltage of the potentiometer Rs, and when the potentiometer Rs built by a pure hardware circuit is used for adjusting the brightness, the dimming curve which is more suitable for the sensory experience of human eyes can be configured. However, after the potentiometer Rs is adjusted in a full range in a certain interval of the power supply voltage and the required voltage interval is achieved by configuring the upper and lower divider resistors, the obtained brightness curve is similar to a straight line, which is not in line with the sensory requirements of human eyes and has an unsatisfactory effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cabin illumination potentiometer circuit, cabin lighting control device and method can be through the hardware circuit of pure, and better realization accords with the luminance change curve of people's eye.

In order to realize the purpose, the technical scheme of the utility model is as follows: the output end of the potentiometer power supply reference unit is respectively connected with a first end of the resistor R1 and a first end of the resistor R3, a second end of the resistor R1 is respectively connected with a first end of the resistor R2 and a same-phase end of the first voltage follower, a second end of the resistor R2 is grounded, the output end of the first voltage follower is connected with an upper arm voltage end of the potentiometer, a second end of the resistor R3 is respectively connected with a first end of the resistor R4 and a same-phase end of the second voltage follower, a second end of the resistor R4 is grounded, the output end of the second voltage follower is connected with a lower arm voltage end of the potentiometer, and an adjusting end of the potentiometer is an adjusting voltage output end.

The utility model discloses still provide passenger cabin lighting control device, include, filtering surge treatment circuit, voltage conversion circuit, step-down drive circuit and foretell potentiometer circuit.

As a preferable scheme of the cabin lighting control device, the filtering/surge processing circuit is used for filtering/surge processing the aircraft power supply voltage from the outside, and the voltage conversion circuit is used for converting the aircraft power supply voltage processed by the filtering/surge processing circuit and then supplying the converted aircraft power supply voltage to the potentiometer power supply reference unit.

The utility model also provides a cabin lighting control method, which comprises the following steps,

providing the cabin lighting control device;

the filtering/surge processing circuit is used for filtering/surge processing the aircraft power supply voltage from the outside, and the voltage conversion circuit is used for converting the aircraft power supply voltage processed by the filtering/surge processing circuit and then supplying the converted aircraft power supply voltage to the potentiometer power supply reference unit;

the reference voltage U3 provided by the potentiometer power supply reference unit is divided into two paths, one path is subjected to proportional voltage division through a resistor R1 and a resistor R2 to obtain a voltage value Ua, and the other path is subjected to proportional voltage division through a resistor R3 and a resistor R4 to obtain a voltage value Ub; the voltage values Ua and Ub are used as input signals of non-inverting input terminals of the first voltage follower and the second voltage follower respectively, and the output voltage values Ua1 and Ub1 are used as limiting voltages of two ends of the potentiometer.

Compared with the prior art, the utility model has the technical effects that: by using the potentiometer Rs power supply reference circuit, the voltage proportion distribution and the design method of the voltage follower, the problem that when the illumination brightness of the cabin is adjusted by using a pure hardware circuit is effectively solved, a brightness dimming curve adaptive to human eye perception is configured in a certain section of the potentiometer Rs power supply voltage, and the approximately linear change of the brightness in the section is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a cabin lighting control device according to an embodiment of the present invention.

Fig. 2 is a schematic block diagram of a circuit for changing the dimming voltage interval according to an embodiment of the present invention.

Fig. 3 is a circuit diagram of a potentiometer according to an embodiment of the present invention for limiting voltage.

Fig. 4 is a circuit diagram of a potentiometer according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 3, the normal power supply U of the aircraft processed by the filter and the surge suppressor₁After passing through the voltage conversion circuit, the output voltage is U₂This voltage is used as the supply voltage for the reference circuit to which the potentiometer Rs supplies. The output voltage U of the reference circuit₃One-way pass resistors R1, R₂Carrying out proportional voltage division to obtain a voltage value U_aThe other path is through R₃、R₄Carrying out proportional voltage division to obtain a voltage value U_bThe two voltages are respectively used as the input signals of the same-direction ends of the

voltage followers

1 and 2, and the output voltage value is

As a limiting voltage across the upper and lower ends of the potentiometer Rs. At this time, the process of the present invention,

in which a resistor R is connected in parallel with a potentiometer Rs_xThe resistance value (used for configuring the brightness curve adapted to human eye perception) can be changed according to different human eye perceptions. If the implementation is in 0V-U₃In a certain time interval, the brightness needs to be adjusted₁、R₂、R₃And R₄The resistance value of the U is further changed, and the corresponding proportion distribution is further changed, so that the changed U is finally obtained_a、U_bIs obtained through a voltage follower

Referring to FIG. 4, if two voltage followers are not connected, the resistor R is directly connected to_x1、R_x2Is connected to a potentiometer R_sThe upper and lower ends of the voltage divider are proportionally divided, although corresponding limiting voltage can be obtained

However, when the potentiometer Rs is adjusted, R_xAnd a resistor R_s2The total resistance value of the resistor is changed correspondingly, and then the proportional voltage division is obtained

Also varies, and finally the output voltage U at the regulation end of the potentiometer Rs_XCan be influenced, so that the output voltage U of the end is adjusted by the collecting potentiometer Rs_XAll points formed by the range of the adjusting knob will converge to a straight line and not to an exponential curve.

Because the potentiometer Rs is from 0V-U₃During adjustment, the voltage values at the two ends are fixed, and the formed brightness curve is in accordance with the perception of human eyes. And the voltage value output by the middle voltage follower of the utility model

Is constant, and the brightness curve formed in the voltage interval is equal to the voltage between 0V and U₃The brightness curves formed by the adjustment are approximately consistent, the perception of human eyes on brightness is met, and the flexibility of illumination brightness adjustment during day and night is improved. Therefore, in the reference voltage supplied by the potentiometer Rs, the proportion of the voltage-dividing resistor in front of the voltage follower is changed, and the purpose that the potentiometer Rs can adjust light in different ranges according to an exponential curve can be achieved.

The above description is only intended to illustrate the embodiments of the present invention, and the description is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The cabin lighting potentiometer circuit is characterized by comprising a potentiometer power supply reference unit, a first voltage follower, a second voltage follower and a potentiometer, wherein the output end of the potentiometer power supply reference unit is respectively connected with the first end of a resistor R1 and the first end of a resistor R3, the second end of a resistor R1 is respectively connected with the first end of a resistor R2 and the same-phase end of the first voltage follower, the second end of the resistor R2 is grounded, the output end of the first voltage follower is connected with the upper arm voltage end of the potentiometer, the second end of the resistor R3 is respectively connected with the first end of a resistor R4 and the same-phase end of the second voltage follower, the second end of the resistor R4 is grounded, the output end of the second voltage follower is connected with the lower arm voltage end of the potentiometer, and the adjusting end of the potentiometer is an adjusting voltage output end.

2. The cabin lighting control device comprises a filter/surge processing circuit, a voltage conversion circuit and a voltage reduction driving circuit, and is characterized by further comprising the potentiometer circuit according to claim 1.

3. The cockpit lighting control device of claim 2 wherein said filtering/surge processing circuit is configured to filter/surge process an aircraft power supply voltage from the outside, and said voltage conversion circuit is configured to convert the aircraft power supply voltage processed by the filtering/surge processing circuit and provide the converted aircraft power supply voltage to said potentiometer power supply reference unit.