A power management circuit for high platform control seat

Abstract

The present application provides a power management circuit for a platform control seat, including a power short-circuit protection unit and at least two brightness adjustment output units. The power short-circuit protection unit includes a power input terminal, and the power short-circuit protection unit is connected to the brightness adjustment output unit. The power short-circuit protection unit is used to cut off the power supply to the brightness adjustment output unit when an abnormal state is detected. The brightness adjustment output unit includes a potentiometer and a first lighting unit, and the brightness adjustment output unit is used to generate different voltage signals through the potentiometer to output different duty cycle frequency signals to achieve brightness adjustment of the first lighting unit. It can effectively improve the safety of the platform control seat and enhance the user experience.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a power management circuit for a high-platform control seat. Background Art

[0002] A high-platform control seat is a seat in an air traffic control center or similar high-level control center. It usually includes components such as a bracket, a main cabinet, an operating table and a display, and is used by air traffic controllers to perform air traffic control work. The design of a high-platform control seat needs to consider factors such as space layout, visual field, contact distance, and equipment maintenance. The existing control seats are difficult to take into account the comfort of the controller in the screen design to ensure that the controller can perform air traffic control tasks efficiently and accurately.

[0003] The LED display screens used in traditional high-platform control seats have a fixed brightness. In an environment that is too bright or too dark, it may cause visual fatigue to the controller, affecting the controller's work efficiency and accuracy. If a short circuit occurs, it may cause instability in the entire system, including power supply interruption, data loss and other problems. This will affect the reliability and stability of the control seat and reduce the controller's ability to control air traffic. Furthermore, it may also cause damage to electronic equipment, causing safety accidents such as fires, posing a threat to the control seat and the controller. Utility Model Content

[0004] In view of the above shortcomings in the prior art, the present application provides a power management circuit for a high platform control seat to solve at least one of the above technical problems, as follows:

[0005] A power management circuit for a high-platform control seat comprises a power short-circuit protection unit and at least two brightness adjustment output units.

[0006] The power short circuit protection unit includes a power input terminal, and the power short circuit protection unit is connected to the brightness adjustment output unit; the power short circuit protection unit is used to cut off the power supply to the brightness adjustment output unit when an abnormal state is detected.

[0007] The brightness adjustment output unit includes a potentiometer and a first lighting unit. The brightness adjustment output unit is used to generate different voltage signals through the potentiometer to output different duty cycle frequency signals to adjust the brightness of the first lighting unit. In practical applications, by setting multiple outputs, different brightness adjustment output units can be applied to different lighting scenes at the same time by using first lighting units of different types or sizes. For example, some first lighting units are ground lights, and some first lighting units are standby lights and / or maintenance lights.

[0008] In some specific embodiments, the power short circuit protection unit includes a detection MOS tube, a first switch element, and a power output terminal, and the power output terminal is connected to the brightness adjustment output unit.

[0009] The detection MOS tube is connected to the power input terminal and the power output terminal respectively, and the first switch is connected to the power input terminal, the detection MOS tube and the power output terminal respectively. The detection MOS tube is used to detect the level of the power output terminal and / or the power input terminal and control the opening and closing of the first switch according to the detection result.

[0010] In some specific embodiments, the power short circuit protection unit further includes a first resistor, a second resistor, a third resistor and a fourth resistor.

[0011] The detection MOS tube is connected to the power input terminal through the first resistor and to the power output terminal through the second resistor. The detection MOS tube is connected in series with the first switch element through the third resistor, and the first switch element is grounded through the fourth resistor.

[0012] In some specific embodiments, the first switch element and the detection MOS tube include a P-type MOS tube. The detection MOS tube is preset with a voltage threshold, and the detection MOS tube is used to control the first switch element to disconnect when the feedback voltage at the power output end is lower than the threshold; and to control the first switch element to establish a connection when the feedback voltage at the power output end is higher than the threshold.

[0013] In practical applications, the detection MOS tube is a P-type MOS tube. The detection MOS tube judges the operation of the circuit by the level returned from the power output end. In the circuit, a high level usually corresponds to a higher voltage value (usually a positive voltage), while a low level corresponds to a lower voltage value (usually zero voltage or a voltage close to zero). When the circuit as a whole works normally, the power output end feeds back its output voltage to the gate of the detection MOS tube through a preset feedback mechanism. When the power output end is in a normal high level state, the gate voltage of the detection MOS tube is lower than the source voltage. In this case, the source and drain of the detection MOS tube are connected; when the gate voltage of the detection MOS tube is higher than the source voltage, the detection MOS tube will be disconnected.

[0014] In practical applications, the first switch is a P-type MOS tube. The first switch is connected to the power input terminal through a voltage divider circuit composed of a third resistor and a fourth resistor. Since the power input terminal is divided by the third resistor and the fourth resistor, the gate voltage in the first switch is at a relatively low level, i.e., a low level. Therefore, when the gate voltage in the first switch is lower than the source voltage, the power supply of the circuit is in a conducting state.

[0015] When a short circuit occurs to the ground at the power output terminal, the voltage detected by the detection MOS tube will change from a high level to a low level, and at this time, the source and drain of the detection MOS tube will be connected. Due to the conduction of the detection MOS tube, the voltage of the first switch element as a P-type MOS tube will change from a low level to a high level, which causes the source and drain of the first switch element to be disconnected. Therefore, when a short circuit occurs in the circuit, the detection MOS tube can detect the abnormality in the power output terminal, and the power supply in the power output terminal can be cut off in time, which will further protect the first switch element and other subsequent circuit parts from damage.

[0016] In some specific embodiments, a fixed brightness adjustment unit is also included. The fixed brightness adjustment unit includes a second lighting unit, a jumper structure, and a plurality of conductive circuits connected to the second lighting unit, each conductive circuit being connected to a resistor of different resistance. The power output end can be selectively connected to one of the conductive circuits through the jumper structure; the second lighting unit is connected to a potentiometer. Furthermore, one end of the jumper structure in the fixed brightness adjustment unit can be directly connected to the power output end, or can be connected to the power output end through a power buck chip. By connecting the power buck chip, the voltage at the power output end can be converted into a working voltage suitable for the fixed brightness adjustment unit.

[0017] In a specific embodiment, three conductive circuits are included, wherein resistors with different resistance values ​​correspond to different brightness levels of the second lighting unit after the conductive circuits are turned on, such as 50%, 75% and 100% brightness levels.

[0018] In some specific embodiments, the brightness adjustment output unit further includes a power step-down chip, a signal generator, an operational amplifier and a second switch.

[0019] The power step-down chip is respectively connected to the power short circuit protection unit, the signal generator and the operational amplifier, the signal generator is connected to the operational amplifier, and the operational amplifier is connected to the first lighting unit through the second switch. The power step-down chip is used to step down the voltage at the power input end and transmit the voltage to the signal generator and the operational amplifier.

[0020] The signal generator is used to generate a fixed frequency signal and input it into the operational amplifier, and the potentiometer is connected to the operational amplifier.

[0021] In some specific embodiments, the operational amplifier includes a non-inverting input pin and an inverting input pin. The power buck chip is connected to the operational amplifier from the non-inverting input pin through a potentiometer, and the signal generator is connected to the operational amplifier from the inverting input pin.

[0022] The operational amplifier is used to output frequency signals with different duty ratios under the adjustment of the potentiometer and input them into the second switch element to adjust the brightness of the first lighting unit.

[0023] In some specific embodiments, a regulating element group and a capacitor are further included, wherein the regulating element group is connected to the power buck chip, one end of the capacitor is connected to the regulating element group and the other end is grounded. The regulating element group and the capacitor are used to regulate the current and voltage in the power buck chip.

[0024] In some specific embodiments, a fifth resistor is further included, and the power buck chip is connected to the potentiometer via the fifth resistor.

[0025] In some specific embodiments, the second switch element includes an N-type MOS tube, the drain of which is connected to the cathode of the first lighting unit and the source of which is grounded, wherein the N-type MOS tube is used to light up the first lighting unit when turned on.

[0026] In practical applications, the signal generator is usually a PWM (Pulse Width Modulation) signal controller. A PWM signal is a periodic signal that contains two states, a high level and a low level, in each cycle. The characteristics of the signal are controlled by adjusting the duration / pulse width of the high level state.

[0027] In practical applications, the first lighting unit is an LED lighting lamp, and the second switch is an N-type MOS tube, whose drain is connected to the negative electrode of the LED lamp and the source is grounded. When the second switch is turned on, the LED lamp lights up, and when the second switch is turned off, the LED lamp goes out. Since the PWM signal periodically controls the conduction and disconnection of the second switch, the brightness of the LED lamp changes with the duty cycle of the PWM signal. The larger the duty cycle, the higher the brightness of the LED lamp; the smaller the duty cycle, the lower the brightness of the LED.

[0028] In some specific embodiments, the brightness adjustment output unit further includes a light emitting diode and / or a fuse, and the first lighting unit and / or the fuse are connected to the light emitting diode in the current outflow direction. In practical applications, the light emitting diode can be an indicator light, and the working condition of the circuit can be further inferred by the light emitting condition of the light emitting diode.

[0029] Beneficial effects: The present application provides a power management circuit for a platform control seat. By arranging interconnected power short-circuit protection units and brightness adjustment output units in the platform control seat, the platform control seat can quickly disconnect the power connection when a circuit abnormality is identified, thereby protecting the circuit and improving the overall system stability and service life of the platform control seat. It simplifies the circuit design and can effectively allocate and manage the power supply of the circuit; the lighting intensity of the first lighting unit can be steplessly adjusted to reduce the visual fatigue of the controller during work, which can effectively improve the controller's work efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the specific module connection structure in this application;

[0032] Figure 2 It is a simplified schematic diagram of the power short circuit protection unit in this application;

[0033] Figure 3 A simplified schematic diagram of a brightness adjustment output unit in this application;

[0034] Figure 4 is a simplified schematic diagram of a fixed brightness adjustment unit in this application;

[0035] Figure 5 This is a simplified schematic diagram of the overall module connection in this application;

[0036] Figure 6 A circuit diagram showing the connection relationship between the power short circuit protection unit and the brightness fixed adjustment output unit in this application;

[0037] Figure 7 A circuit diagram of a power short circuit protection unit of the present application;

[0038] Fig. 8A A circuit diagram of a brightness adjustment output unit of a standby lamp of the present application;

[0039] Figure 8B A circuit diagram of a brightness fixed adjustment unit for a standby lamp of the present application;

[0040] Fig.9A A circuit diagram of a brightness adjustment output unit of a maintenance lamp of the present application;

[0041] Fig. 9B This is a circuit diagram of a brightness fixed adjustment unit for a maintenance lamp of the present application.

[0042] The figure numbers are as follows: 1-power short-circuit protection unit; 11-power input terminal; 12-detection MOS tube; 13-first switch element; 14-power output terminal; 2-brightness adjustment output unit; 21-potentiometer; 22-first lighting unit; 23-power step-down chip; 24-signal generator; 25-operational amplifier; 26-second switch element; 27-light-emitting diode; 28-fuse; 3-brightness fixed adjustment unit; 31-second lighting unit; 32-jumper structure; 4-adjustment element group; 41-first resistor; 42-second resistor; 43-third resistor; 44-fourth resistor; 45-fifth resistor; 46-sixth resistor; 47-seventh resistor; 48-eighth resistor; 49-ninth resistor; 50-tenth resistor. DETAILED DESCRIPTION

[0043] The concept, specific structure and technical effects of the present application will be clearly and completely described below in combination with the embodiments and drawings to fully understand the purpose, features and effects of the present application.

[0044] Hereinafter, various embodiments of the present application will be described more fully. The present application may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present application to the specific embodiments disclosed herein, but the present application should be understood to cover all adjustments, equivalents and / or alternatives within the spirit and scope of the various embodiments of the present application.

[0045] Hereinafter, the term "include" or "may include" used in various embodiments of the present application indicates the presence of a disclosed function, operation, or element, and does not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present application, the terms "include", "have", and their cognates are intended only to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components, or a combination of the foregoing or the possibility of adding one or more features, numbers, steps, operations, elements, components, or a combination of the foregoing.

[0046] In various embodiments of the present application, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed at the same time. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0047] The expressions (such as "first", "second", etc.) used in the various embodiments of the present application may modify the various constituent elements in the various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present application, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0048] It should be noted that in this application, unless otherwise clearly specified and defined, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present application, a person of ordinary skill in the art should understand that the terms indicating orientation or positional relationship herein are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] The terms used in the various embodiments of the application are only used to describe the purpose of specific embodiments and are not intended to limit the various embodiments of the application. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meanings commonly understood by ordinary technicians in the field of the various embodiments of the application. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in the various embodiments of the application.

[0051] Example

[0052] This embodiment provides a power management circuit for a high platform control seat, and the specific scheme is as follows:

[0053] A power management circuit for a high platform control seat includes: a power short circuit protection unit 1 and at least two brightness adjustment output units 2. The connection relationship is as follows Figure 5 shown.

[0054] The power short circuit protection unit 1 includes a power input terminal 11, and the power short circuit protection unit 1 is connected to the brightness adjustment output unit 2; the power short circuit protection unit 1 is used to cut off the power supply of the brightness adjustment output unit 2 when an abnormal state is detected, such as Figure 2 and Figure 7 shown.

[0055] The brightness adjustment output unit 2 includes a potentiometer 21 and a first lighting unit 22. The brightness adjustment output unit 2 is used to generate different voltage signals through the potentiometer 21 to output different duty cycle frequency signals so as to adjust the brightness of the first lighting unit 22. Figure 1 , Figure 3 and Figure 6 In practical applications, different brightness adjustment output units can be applied to different lighting scenes by using first lighting units of different types or sizes. For example, some first lighting units are ground lights, and some first lighting units are standby lights and / or maintenance lights. Figure 5 shown.

[0056] In some specific embodiments, the power short circuit protection unit 1 includes a detection MOS tube 12 , a first switch element 13 , and a power output terminal 14 , and the power output terminal 14 is connected to the brightness adjustment output unit 2 .

[0057] The detection MOS transistor 12 is respectively connected to the power input terminal 11 and the power output terminal 14, and the first switch element 13 is respectively connected to the power input terminal 11, the detection MOS transistor 12 and the power output terminal 14. The detection MOS transistor 12 is used to detect the level of the power output terminal 14 and / or the power input terminal 11 and control the opening and closing of the first switch element 13 according to the detection result.

[0058] In some specific embodiments, the power short circuit protection unit 1 further includes a first resistor 41, a second resistor 42, a third resistor 43 and a fourth resistor 44. The connection relationship between the components is as follows: Figure 2 shown.

[0059] The detection MOS tube 12 is connected to the power input terminal 11 through the first resistor 41 and to the power output terminal 14 through the second resistor 42. The detection MOS tube 12 is connected in series with the first switch element 13 through the third resistor 43, and the first switch element 13 is grounded through the fourth resistor 44.

[0060] In some specific embodiments, the first switch element 13 and the detection MOS transistor 12 include a P-type MOS transistor. The detection MOS transistor 12 is preset with a voltage threshold, and the detection MOS transistor 12 is used to control the first switch key to disconnect when the feedback voltage of the power output terminal 14 is lower than the threshold; and control the first switch element 13 to establish a connection when the feedback voltage of the power output terminal 14 is higher than the threshold.

[0061] In practical applications, the detection MOS tube 12 determines the operation of the circuit by the level returned from the power output terminal 14. In the circuit, a high level usually corresponds to a higher voltage value (usually a positive voltage), while a low level corresponds to a lower voltage value (usually a zero voltage or a voltage close to zero). When the circuit as a whole works normally, the power output terminal 14 feeds back its output voltage to the gate of the detection MOS tube 12 through a preset feedback mechanism. When the power output terminal 14 is in a normal high level state, the gate voltage of the detection MOS tube 12 is lower than the source voltage. In this case, the source and drain of the detection MOS tube 12 are connected; when the gate voltage of the detection MOS tube 12 is higher than the source voltage, the detection MOS tube 12 will be disconnected.

[0062] In practical applications, the first switch element 13 is a P-type MOS tube. The first switch element 13 is connected to the power input terminal 11 through a voltage divider circuit composed of a third resistor 43 and a fourth resistor 44. Since the power input terminal 11 is divided by the third resistor 43 and the fourth resistor 44, the gate voltage in the first switch element 13 is a relatively low level, that is, a low level. Therefore, when the gate voltage in the first switch element 13 is lower than the source voltage, the power supply of the circuit is in a conducting state.

[0063] When the power output terminal 14 is short-circuited to the ground, the voltage detected by the detection MOS tube 12 will change from a high level to a low level, and at this time, the source and drain of the detection MOS tube 12 will be connected. Due to the conduction of the detection MOS tube 12, the voltage of the first switch element 13, which is a P-type MOS tube, will change from a low level to a high level, which causes the source and drain of the first switch element 13 to be disconnected. Therefore, when a short circuit occurs in the circuit, the detection MOS tube 12 can detect the abnormality in the power output terminal 14, and the power in the power output terminal 14 can be cut off in time, which will further protect the first switch element 13 and other subsequent circuit parts from damage.

[0064] In some specific embodiments, a brightness fixed adjustment unit 3 is also included, such as Figure 4As shown. The brightness fixed adjustment unit 3 includes a second lighting unit 31, a jumper structure 32, and a plurality of conductive circuits connected to the second lighting unit 31, each conductive circuit being connected to resistors of different resistance values. The power output terminal 14 can be selectively connected to one of the conductive circuits through the jumper structure 32; the second lighting unit 31 is connected to the potentiometer 21. In a specific embodiment, three conductive circuits are included, wherein resistors of different resistance values ​​correspond to different brightness levels of the second lighting unit 31 after the conductive circuit is turned on, such as a brightness value of 50%, a brightness value of 75%, and a brightness value of 100%. The jumper structure 32 can be a jumper cap, through which the electric energy in the power output terminal 14 flows into the second lighting unit 31 through different resistors, so as to control the brightness of the second lighting unit 31 to change between several preset levels. It should be noted that the present embodiment does not limit the number and specific values ​​of the brightness levels. In practical applications, the levels can be set and adjusted as needed.

[0065] In an actual application process, the first lighting unit 22 and the second lighting unit 31 are connected to the potentiometer 21 together, so the first lighting unit 22 and the second lighting unit 31 can realize a stepless adjustment mode for the lighting brightness under the adjustment of the potentiometer 21; at the same time, since the second lighting unit 31 is also connected to the jumper structure 32 through the first lighting unit 22, the first lighting unit 22 and the second lighting unit 31 can also realize a fixed level adjustment mode for the lighting brightness under the adjustment of the jumper structure 32. This dual brightness adjustment mode can be well applied to the situation where the first lighting unit 22 and the second lighting unit 31 are a kind of backup lamp, such as Fig. 8A and Figure 8B shown.

[0066] In an actual application, the lighting unit can also be a maintenance lamp. As an emergency lamp, the maintenance lamp has fewer lighting and brightness adjustment requirements than the ground lamp and the backup lamp. In one embodiment, the first lighting unit 22 and the second lighting unit 31 are maintenance lamps. The two lighting units can be connected to the potentiometer 21 or the jumper structure 32, and one of the two brightness adjustment modes can be used, which can further simplify the connection structure of the circuit in this application, such as Fig.9A and Fig. 9B shown.

[0067] In some specific embodiments, the brightness adjustment output unit 2 further includes a power buck chip 23, a signal generator 24, an operational amplifier 25 and a second switch 26. The connection relationship between the components is as follows: Figure 3 shown.

[0068] The power step-down chip 23 is connected to the power output terminal 14, the signal generator 24 and the operational amplifier 25 respectively, the signal generator 24 is connected to the operational amplifier 25, and the operational amplifier 25 is connected to the first lighting unit 22 through the second switch 26. The power step-down chip 23 is used to step down the current provided by the power output terminal 14 and transmit the current to the signal generator 24 and the operational amplifier 25.

[0069] The signal generator 24 is used to generate a fixed frequency signal and input it into the operational amplifier 25. The potentiometer 21 is connected to the operational amplifier 25. In some specific embodiments, the operational amplifier 25 includes a non-inverting input pin, i.e. Figure 6 The third pin shown is the inverting input pin. Figure 6 The power buck chip 23 is connected to the operational amplifier 25 from the non-inverting input pin through the potentiometer 21, and the signal generator 24 is connected to the operational amplifier 25 from the inverting input pin.

[0070] The operational amplifier 25 is used to output frequency signals with different duty ratios under the adjustment of the potentiometer 21 and input them into the second switch element 26 to adjust the brightness of the first lighting unit 22 .

[0071] In some specific embodiments, the regulating element group 4 and the capacitor are further included. The regulating element group 4 is connected to the power buck chip 23. One end of the capacitor is connected to the regulating element group 4 and the other end is grounded. The regulating element group 4 and the capacitor are used to regulate the current and voltage in the power buck chip 23.

[0072] In some specific embodiments, a fifth resistor 45 is further included, and the power buck chip 23 is connected to the potentiometer 21 via the fifth resistor 45 .

[0073] In some specific embodiments, the second switch 26 includes an N-type MOS tube, the drain of which is connected to the cathode of the first lighting unit 22 and the source of which is grounded. The N-type MOS tube is used to light up the first lighting unit 22 when it is turned on.

[0074] In practical applications, the signal generator 24 is usually a PWM signal controller. A PWM signal is a periodic signal that contains two states, a high level and a low level, in each period. The characteristics of the signal are controlled by adjusting the duration / pulse width of the high level state.

[0075] In practical applications, the first lighting unit 22 is an LED lighting lamp, and the second switch 26 is an N-type MOS tube, whose drain is connected to the cathode of the LED lamp and whose source is grounded. When the second switch 26 is turned on, the LED lamp lights up, and when the second switch 26 is turned off, the LED lamp turns off.

[0076] The brightness of the LED light changes with the duty cycle of the PWM signal. The larger the duty cycle, the higher the brightness of the LED light; the smaller the duty cycle, the lower the brightness of the LED.

[0077] Specifically, when the duty cycle of the PWM signal increases, it means that within a PWM cycle, the high level time becomes longer and the low level time becomes shorter. For lighting equipment such as LED lamps, when the level is high, the LED lamp is powered on and emits light, while during the low level period, the LED lamp does not emit light or emits light weakly. Therefore, the duty cycle of the PWM signal actually means that the longer the LED lamp is powered on and emits light per unit time, the higher the average brightness of the LED lamp; when the duty cycle of the PWM signal decreases, the LED lamp is powered on and emits light during the in-position time, which leads to a decrease in the average brightness of the LED lamp. By adjusting the duty cycle of the PWM signal to control the brightness of the first lighting unit 22, stepless dimming can be achieved, and the first lighting unit 22 has the advantages of high light adjustment accuracy and fast response speed. In practical applications, there can be multiple brightness adjustment output units 2 used in different scenes at the same time, and the LED lamp used can be a ground lamp, a bull's eye spotlight, a spare lamp or a maintenance lamp, etc.

[0078] In a specific embodiment, a 12V power supply is inputted into the brightness adjustment output unit 2 from the power output terminal 14, and is reduced to 5V by the power step-down chip 23, so as to provide a stable working voltage for the signal generator 24 and the operational amplifier 25. Furthermore, the signal generator 24 generates a fixed frequency signal through the adjustment of the peripheral adjustment element group 4, namely the sixth resistor 46, the seventh resistor 47 and the capacitor, and inputs this signal to the second pin, namely the inverting input pin, of the operational amplifier 25. At the same time, the potentiometer 21 can generate a voltage signal within a certain range through the voltage division of the fifth resistor 45 and the eighth resistor 48, and input this voltage signal to the third pin, namely the non-inverting input pin, of the operational amplifier 25.

[0079] The operational amplifier 25 performs internal processing on the input frequency signal and voltage signal, and outputs frequency signals with different duty cycles to the gate of the second switch element 26 after the processing.

[0080] Furthermore, by adjusting the position of the potentiometer 21, the voltage value input to the non-reverse pin can be changed to change the duty cycle frequency signal output by the operational amplifier 25. The conduction time of the second switch 26 is further controlled by this changed duty cycle frequency signal to achieve the adjustment of the brightness of the first lighting unit 22.

[0081] In practical applications, the potentiometer 21 can be manually adjusted by a user, or the potentiometer 21 can be further connected to a light sensor to sense the external light intensity and then automatically adjust the brightness of the first lighting unit 22 based on preset rules.

[0082] In some specific embodiments, the brightness adjustment output unit 2 further includes a light emitting diode 27 and / or a fuse 28, and the first lighting unit 22 and / or the fuse 28 are connected to the light emitting diode 27 in the current outflow direction. In practical applications, the light emitting diode 27 can be an indicator light to indicate the working status of the high platform control seat, and play multiple roles such as indication, lighting, fault prompting, and beautification.

[0083] It should be noted that, in practical applications, a tenth resistor 50 for adjusting the stable voltage may be connected in series between the light emitting diode 27 and the first lighting unit 22; a ninth resistor 49 and a diode may be connected in series between the power output terminal 14 and the power step-down chip 23. In practical applications, more voltage adjustment components may be included, such as Figure 5 and Figure 6 As shown, a grounded capacitor can also be set between the connected components in the circuit to help filter high-frequency noise and interference in the circuit, ensure stable and reliable operation of the circuit, absorb and release charges to a certain extent, and reduce crosstalk and mutual influence between signals.

[0084] This embodiment provides a power management circuit for a high-platform control seat. By setting an interconnected power short-circuit protection unit and at least two brightness adjustment output units in the high-platform control seat, it is possible to increase the backup plan for lighting and improve the safety protection capability of the high-platform control seat circuit. The circuit design is further simplified, which can effectively improve the overall system stability and service life of the high-platform control seat; the lighting intensity of the first lighting unit can be adjusted steplessly and at a fixed level, which can reduce the visual fatigue of the controller during work and effectively improve the work efficiency and accuracy of the controller, i.e., the user.

[0085] The above is a specific description of the preferred implementation of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A power management circuit for a high platform control seat, characterized in that: include: A power short circuit protection unit, and at least two brightness adjustment output units; The power short circuit protection unit comprises a power input terminal, and the power short circuit protection unit is connected to the brightness adjustment output unit; The power short circuit protection unit is used to cut off the power supply to the brightness adjustment output unit when an abnormal state is detected; The brightness adjustment output unit includes a potentiometer and a first lighting unit. The brightness adjustment output unit is used to generate different voltage signals through the potentiometer to output different duty cycle frequency signals so as to adjust the brightness of the first lighting unit.

2. A power management circuit for a high platform control seat according to claim 1, characterized in that: The power short circuit protection unit comprises a detection MOS tube, a first switch element, and a power output end, and the power output end is connected to the brightness adjustment output unit; The detection MOS tube is respectively connected to the power input end and the power output end, and the first switch is respectively connected to the power input end, the detection MOS tube and the power output end; The detection MOS tube is used to detect the level of the power output terminal and / or the power input terminal and control the opening and closing of the first switch element according to the detection result.

3. A power management circuit for a high platform control seat according to claim 2, characterized in that: The power short circuit protection unit further includes a first resistor, a second resistor, a third resistor and a fourth resistor; The detection MOS tube is connected to the power input end through the first resistor and connected to the power output end through the second resistor; The detection MOS tube is connected in series with the first switch element through the third resistor; The first switch element is grounded through the fourth resistor.

4. A power management circuit for a high platform control seat according to claim 2, characterized in that: The first switch element and the detection MOS tube include P-type MOS tubes; The detection MOS tube is preset with a voltage threshold, and the detection MOS tube is used to control the first switch key to disconnect when the feedback voltage at the power output end is lower than the threshold; and to control the first switch element to establish a connection when the feedback voltage at the power output end is higher than the threshold.

5. The power management circuit for a high platform control seat according to claim 2, characterized in that: Also includes a brightness fixed adjustment unit; The fixed brightness adjustment unit comprises a second lighting unit, a jumper structure, and a plurality of conductive circuits connected to the second lighting unit, each of the conductive circuits being connected to a resistor with a different resistance value; the power supply output end can be selectively connected to one of the conductive circuits through the jumper structure; The second lighting unit is connected to the potentiometer.

6. The power management circuit for a high platform control seat according to claim 1, characterized in that: The brightness adjustment output unit also includes a power buck chip, a signal generator, an operational amplifier and a second switch; The power step-down chip is respectively connected to the power short-circuit protection unit, the signal generator and the operational amplifier, the signal generator is connected to the operational amplifier, and the operational amplifier is connected to the first lighting unit through the second switch; The signal generator is used to generate a fixed frequency signal and input the fixed frequency signal into the operational amplifier; the potentiometer is connected to the operational amplifier.

7. A power management circuit for a high platform control seat according to claim 6, characterized in that: The operational amplifier comprises a non-inverting input pin and an inverting input pin; The power step-down chip is connected to the operational amplifier from the non-inverting input pin through the potentiometer, and the signal generator is connected to the operational amplifier from the inverting input pin; The operational amplifier is used for outputting the frequency signal with different duty ratios under the adjustment of the potentiometer and inputting it into the second switch element, so as to adjust the brightness of the first lighting unit.

8. The power management circuit for a high platform control seat according to claim 6, characterized in that: It also includes a regulating element group and a capacitor, wherein the regulating element group is connected to the power buck chip, and one end of the capacitor is connected to the regulating element group and the other end is grounded; The regulating element group and the capacitor are used to regulate the current and voltage in the power buck chip.

9. The power management circuit for a high platform control seat according to claim 6, characterized in that: It also includes a fifth resistor, and the power supply step-down chip is connected to the potentiometer via the fifth resistor.

10. The power management circuit for a high platform control seat according to claim 6, characterized in that: The second switch element comprises an N-type MOS tube, the drain of the N-type MOS tube is connected to the cathode of the first lighting unit, and the source of the N-type MOS tube is grounded; The N-type MOS tube is used to light up the first lighting unit when it is turned on.

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