Airborne power distribution unit for navigation and retrofit

Abstract

The utility model relates to an airborne power distribution unit for navigation and modification. The airborne power distribution unit comprises a relay, a main chip, a voltage sampling unit and a current sampling unit, the sampling current unit comprises a first resistor, a second resistor and a current follower; one end of the first resistor is electrically connected to a third pin of the relay, one end of the first resistor is electrically connected to an IN + pin of the main chip, and the other end of the first resistor is electrically connected to an IN-pin of the main chip; one end of the second resistor is electrically connected to an OUT pin of the main chip, and the other end of the second resistor is electrically connected to the current follower; the sampling voltage unit comprises a third resistor, a fourth resistor, a fifth resistor and a voltage follower; one end of the third resistor is electrically connected to a third pin of the relay, the other end of the third resistor is electrically connected to one end of the fourth resistor, the other end of the fourth resistor is electrically connected to one end of the fifth resistor, and the other end of the fifth resistor is electrically connected to a fifth pin of the voltage follower.

Description

Technical Field

[0001] The present application relates to the field of aviation electrical systems, and in particular to an onboard power distribution unit for general aviation modification. Background Art

[0002] The onboard power distribution unit is a device used to distribute the electrical energy generated by the generator on the aircraft to different electrical equipment on board. In addition to the distribution function, the onboard power distribution unit also has the functions of controlling the circuit and protecting the circuit. The application of the onboard power distribution unit in general aviation modification is to distribute the electrical energy generated by the aircraft generator to the installed electrical equipment, and while controlling the opening and closing of the electrical equipment, it also plays a role in protecting the electrical equipment and the aircraft power supply.

[0003] The existing onboard power distribution channels cannot detect the power consumption of each power-consuming device in real time, which means that operators cannot timely discover the load status of power-consuming devices through channel data, such as the detection and reporting functions of short circuit, open circuit, or impedance abnormality. Once the power-consuming devices on the aircraft fail, the operators cannot open and close the power-consuming devices in time, making it difficult to ensure the safety of aircraft power distribution. Utility Model Content

[0004] In view of this, the present application proposes an airborne power distribution unit for general aviation modification to solve the above problems.

[0005] According to one aspect of the present application, there is provided an airborne power distribution unit for general aviation modification, comprising: a relay, a main chip, a sampling voltage unit and a sampling current unit; the relay is electrically connected to the main chip, the main chip is electrically connected to the sampling current unit, and the sampling voltage unit is electrically connected to the relay;

[0006] The sampling current unit comprises: a first resistor, a second resistor and a current follower;

[0007] One end of the first resistor is electrically connected to pin 3 of the relay, one end of the first resistor is electrically connected to the IN+ pin of the main chip, and the other end of the first resistor is electrically connected to the IN- pin of the main chip; one end of the second resistor is electrically connected to the OUT pin of the main chip, and the other end of the second resistor is electrically connected to the current follower;

[0008] The sampling voltage unit includes: a third resistor, a fourth resistor, a fifth resistor and a voltage follower; one end of the third resistor is electrically connected to pin 3 of the relay, the other end of the third resistor is electrically connected to one end of the fourth resistor, the other end of the fourth resistor is electrically connected to one end of the fifth resistor, and the other end of the fifth resistor is electrically connected to pin 5 of the voltage follower.

[0009] In a possible implementation, the device further includes: a filtering unit; the filtering unit includes: a sixth resistor, a first capacitor, and a second capacitor;

[0010] One end of the sixth resistor is electrically connected to the other end of the second resistor, and the other end of the sixth resistor is electrically connected to pin 3 of the current follower;

[0011] One end of the sixth resistor is electrically connected to one end of the first capacitor, the other end of the sixth resistor is electrically connected to one end of the second capacitor, the other end of the first capacitor is grounded, and the other end of the second capacitor is grounded.

[0012] In a possible implementation, the device further includes: a third capacitor; one end of the third capacitor is electrically connected to the VS pin of the main chip, and the other end of the third capacitor is grounded.

[0013] In a possible implementation, the device further includes: a fourth capacitor; one end of the fourth capacitor is electrically connected to pin 2 of the current follower, and the other end of the fourth capacitor is grounded.

[0014] In a possible implementation, it also includes: a fifth capacitor; one end of the fifth capacitor is electrically connected to pin 3 of the relay, the other end of the fifth capacitor is electrically connected to pin 4 of the relay, and one end of the fifth capacitor is electrically connected to one end of the third resistor.

[0015] In a possible implementation, one end of the fifth capacitor is electrically connected to pin No. 1 of the output interface, and pin No. 2 of the output interface is electrically connected to one end of the first resistor.

[0016] In a possible implementation, it also includes: a seventh resistor and a diode; one end of the seventh resistor is electrically connected to pin 1 of the output interface, the other end of the seventh resistor is electrically connected to one end of the diode, and the other end of the diode is grounded.

[0017] In a possible implementation, the model of the main chip is INA180.

[0018] Beneficial effects of this application:

[0019] The airborne power distribution unit for general aviation modification of the present application is connected to pin 4 of the relay through the positive pole of the component voltage, and enters the sampling current unit and the sampling voltage unit through pin 3 of the relay after being controlled by the relay. The voltage and current acquisition system can use the current and voltage signals flowing through the loop, wherein the sampling current unit cooperates with the first resistor to sample through the main chip. The sampling voltage unit collects data through the third resistor, the fourth resistor and the fifth resistor in the form of resistance voltage division. After that, the current signal enters the back end through the current follower for related operations, and the voltage signal enters the voltage follower and enters the back end for related operations. Therefore, the implementers in the relevant field can obtain the power consumption data of the airborne channel in real time, thereby improving the safety of the airborne power distribution unit.

[0020] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 A circuit diagram showing an onboard power distribution unit for general aviation modification according to an embodiment of the present application;

[0023] Figure 2 A schematic diagram showing an onboard power distribution unit for general aviation modification according to an embodiment of the present application;

[0024] Figure 3 A communication diagram of a LAN for an onboard power distribution unit modified for general aviation according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0026] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the referred device or element 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.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0029] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0030] like Figure 1 As shown, the airborne power distribution unit for general aviation modification includes: a relay HK1, a main chip U1, a sampling voltage unit and a sampling current unit; the relay HK1 is electrically connected to the main chip U1, the main chip U1 is electrically connected to the sampling current unit, and the sampling voltage unit is electrically connected to the relay HK1; the sampling current unit includes: a first resistor R1, a second resistor R4 and a current follower U21; one end of the first resistor R1 is electrically connected to the No. 3 pin of the relay HK1, one end of the first resistor R1 is electrically connected to the IN+ pin of the main chip U1, and the other end of the first resistor R1 is electrically connected to IN- pin of the main chip U1; one end of the second resistor R4 is electrically connected to the OUT pin of the main chip U1, and the other end of the second resistor R4 is electrically connected to the current follower U21; the sampling voltage unit includes: a third resistor R2, a fourth resistor R5, a fifth resistor R7 and a voltage follower U22; one end of the third resistor R2 is electrically connected to pin 3 of the relay HK1, the other end of the third resistor R2 is electrically connected to one end of the fourth resistor R5, the other end of the fourth resistor R5 is electrically connected to one end of the fifth resistor R7, and the other end of the fifth resistor R7 is electrically connected to pin 5 of the voltage follower U22.

[0031] This embodiment proposes an airborne power distribution unit for general aviation modification, which is connected to pin 4 of relay HK1 through the positive pole of the component voltage, and enters the sampling current unit and the sampling voltage unit through pin 3 of relay HK1 after being controlled by relay HK1. The voltage and current acquisition system can use the current and voltage signals flowing through the loop, wherein the sampling current unit cooperates with the first resistor R1 to sample through the main chip U1. The sampling voltage unit collects data through the third resistor R2, the fourth resistor R5 and the fifth resistor R7 in the form of resistor voltage division. After that, the current signal enters the back end through the current follower U21 for related operations, and the voltage signal enters the voltage follower U22 and enters the back end for related operations. Therefore, the implementation personnel in the relevant field can obtain the power consumption data of the airborne channel in real time, thereby improving the safety of the airborne power distribution unit.

[0032] like Figure 2As shown, the airborne power distribution unit also includes: an interconnected motherboard, a control module, a power distribution module and a load device; the interconnected motherboard receives the electric energy of the aircraft generator, the interconnected motherboard and the control module are connected in a two-way communication manner, and the interconnected motherboard and the load device are connected in a two-way communication manner; the control module and the power distribution module are connected in a communication manner; the control module includes: an auxiliary power supply unit, a signal acquisition and conditioning unit and a central control unit; the output end of the auxiliary power supply unit is connected in a communication manner with the input end of the signal acquisition and conditioning unit, the output end of the auxiliary power supply unit is connected in a communication manner with the input end of the central control unit, and the output end of the signal acquisition unit is connected in a communication manner with the input end of the central control unit; the output end of the auxiliary power supply unit is connected in a communication manner with the input end of the power distribution module, and the center line control unit is connected in a two-way communication manner with the power distribution module. It should also be noted that the signal acquisition unit has an analog quantity conditioner and a discrete quantity conditioner; the analog quantity conditioner transmits an analog quantity signal to the central control unit; the discrete quantity conditioner transmits a discrete quantity signal to the central control unit. It should be further explained that the central control unit has a CPU and peripheral circuits, an external storage circuit and a bus communication circuit; the CPU and peripheral circuits are connected to the external storage circuit in a two-way communication manner; the CPU and peripheral circuits are connected to the bus communication circuit in a two-way communication manner; the bus communication circuit is connected to the power distribution module in a two-way communication manner. It should be further explained that the power distribution module includes a rated power distribution unit, the number of rated power distribution units is more than two, and the rated power distribution unit is connected to the central control unit in a communication manner. It should be further explained that the load equipment includes a host device and other equipment; the host computer is connected to the interconnected motherboard in a two-way communication manner through a communication bus; other equipment is connected to the interconnected motherboard in a two-way communication manner through a communication bus. It should be further explained that it also includes: a lightning protection filter board; a lightning protection filter board is connected to the load equipment in a two-way communication manner, and a lightning protection filter board is connected to the interconnected motherboard in a two-way communication manner. It should be further explained that the communication bus includes: a LAN bus, an RS232 bus, an RS48 bus, an RS422 bus and a GPIB bus.

[0033] In a possible implementation, it also includes: a filtering unit; the filtering unit includes: a sixth resistor R6, a first capacitor C4 and a second capacitor C5; one end of the sixth resistor R6 is electrically connected to the other end of the second resistor R4, and the other end of the sixth resistor R6 is electrically connected to pin 3 of the current follower U21; one end of the sixth resistor R6 is electrically connected to one end of the first capacitor C4, and the other end of the sixth resistor R6 is electrically connected to one end of the second capacitor C5, the other end of the first capacitor C4 is grounded, and the other end of the second capacitor C5 is grounded. In this embodiment, it should be noted that the specific frequency is effectively filtered out, and the required effective current signal is obtained and transmitted to the current follower U21, and the current follower U21 transmits backward, so that the implementers in this field can obtain relatively accurate sampling current data.

[0034] In a possible implementation, it further includes: a third capacitor C2; one end of the third capacitor C2 is electrically connected to the VS pin of the main chip U1, and the other end of the third capacitor C2 is grounded. In this embodiment, it should be noted that a 5V voltage is input to the main chip U1 through the VS pin, and filtered through the third capacitor C2 to prevent the 5V voltage from being transmitted to the main chip U1 and affecting the electrical signal output by the OUT pin of the main chip U1.

[0035] In a possible implementation, it further includes: a fourth capacitor C1; one end of the fourth capacitor C1 is electrically connected to pin 2 of the current follower U21, and the other end of the fourth capacitor C1 is grounded. In this embodiment, it should be noted that the fourth capacitor C1 is provided to filter the current input to the current follower U21.

[0036] In a possible implementation, it also includes: a fifth capacitor C3; one end of the fifth capacitor C3 is electrically connected to pin 3 of relay HK1, the other end of the fifth capacitor C3 is electrically connected to pin 4 of relay HK1, and one end of the fifth capacitor C3 is electrically connected to one end of the third resistor R2. In this embodiment, it should be noted that by setting the fifth capacitor C3, the contacts of relay HK1 are protected, that is, when the contacts are disconnected, the voltage at both ends of the contacts suddenly changes, which will cause sparks and burn the contacts. After setting the fifth capacitor C3, due to the charging and discharging effect of the capacitor, the voltage at both ends of the contacts will not suddenly change, which will avoid sparks.

[0037] In a possible implementation, one end of the fifth capacitor C3 is electrically connected to pin 1 of the output interface, and pin 2 of the output interface is electrically connected to one end of the first resistor R1. In this embodiment, it should be noted that the output interface needs to output voltage, pin 1 of the output interface is the positive pole, and pin 2 of the output interface is the negative pole. The power supply comes in and is controlled by the relay HK1 to go out. It should also be noted that a part of the current is shunted at the output interface to enter the first resistor R1 for current sampling, and the other part of the current is output to protect the main chip U1 from overcurrent.

[0038] In a possible implementation, it further includes: a seventh resistor R3 and a diode LED1; one end of the seventh resistor R3 is electrically connected to pin 1 of the output interface, the other end of the seventh resistor R3 is electrically connected to one end of the diode LED1, and the other end of the diode LED1 is grounded. In this embodiment, it should be noted that the diode LED1 is provided to indicate voltage output through the indicator light.

[0039] In a possible implementation, the model of the main chip U1 is INA180.

[0040] In summary, it should be noted that the airborne power distribution unit designed in this utility model patent according to the requirements of general aviation modification is used to realize the power management of modified equipment. It completes the control of power equipment channels, channel data collection, channel protection, power conditioning and BIT functions. It has the function of adjusting the current time protection curve, and the protection curve can be set according to the load characteristics. The rated value of each output load channel can be programmed according to the use requirements.

[0041] Among them, the power equipment channel can control the connection / disconnection of each lower-level load channel in manual / automatic mode, and the manual mode has a higher priority than the automatic mode. In automatic mode, the bus signal is received; in manual mode, the discrete quantity signal is received to complete the connection / disconnection of the load channel. In automatic mode, the power equipment channel can realize the control of five communication buses including LAN, RS232, RS48, RS422 and GPIB to adapt to the communication control of the host computer with different communication methods. The collection of power equipment channel data can collect the output channel status in real time, including the connection, disconnection, voltage, current, overcurrent protection, short circuit protection, fault and other information of the output channel; at the same time, the hard-line override collection channel can send voltage, trip and other status information to the outside. The power equipment channel has functions such as overcurrent protection, undervoltage protection, overvoltage protection and short circuit protection. When a fault occurs, the switch of the faulty channel can be cut off in time to protect the power equipment and the onboard power distribution unit. Among them, the onboard power distribution unit can set the reverse delay protection, and the overcurrent is I 2 The power conditioning of the power consumption channel has the functions of EMI filtering, voltage surge and spike suppression, which can improve the anti-interference ability of the airborne power distribution unit and avoid the impact on other equipment during operation. The power conditioning of the power consumption channel, the voltage stabilization function can make the input voltage in the range of 18 to 32VDC, and the stable output is 28VDC; the input voltage is in the range of 9 to 36VDC, and the main control module of the airborne power distribution unit can work normally. The BIT function of the power consumption channel, the airborne power distribution unit has power-on self-test, periodic self-test and maintenance self-test, which are used to complete the automatic detection of the software and hardware functions and performance of the airborne power distribution unit, and when a fault is found, it can automatically isolate the fault and issue an alarm.

[0042] like Figure 3As shown, the first end of the LAN terminal board J1 is electrically connected to the cathode of the first LED, the anode of the first LED is electrically connected to one end of the capacitor R15, and the other end of the capacitor R15 is electrically connected to the power supply; wherein the first LED is a data indicator light, the first LED emits yellow light, the first LED transmits a data signal, and flashes yellow light when there is data forwarding. The second end of the LAN terminal board J1 is electrically connected to the cathode of the second LED, the anode of the second LED is electrically connected to one end of the capacitor R21, and the other end of the capacitor R21 is electrically connected to the power supply; wherein the second LED is a physical connection status indicator light, the second LED emits green light, and when the physical connection is complete and the circuit is normal, the second LED lights up. Usually the first LED light and the second LED light are used to observe whether the circuit of the LAN terminal board J1 is activated or unobstructed. The third end of the LAN terminal board J1 is electrically connected to one end of the capacitor C21, and the other end of the capacitor C21 is electrically connected to the RXP end of the transceiver signal line, that is, the RXP end is the positive pole of the receiving end. The fourth end of the LAN terminal board J1 is electrically connected to one end of the capacitor C22, and the other end of the capacitor C22 is electrically connected to the RXN end of the transceiver signal line, that is, the RXN end is the negative pole of the receiving end. The other end of the capacitor C21 is electrically connected to one end of the resistor R13, and the other end of the capacitor C22 is electrically connected to one end of the resistor R14. The other end of the resistor R13 and the other end of the resistor R14 are both electrically connected to one end of the capacitor C20, and the fifth end of the LAN terminal board J1 is electrically connected to one end of the capacitor C20, and the other end of the capacitor C20 is grounded. The sixth end of the LAN terminal board J1 is electrically connected to the TXP end of the transceiver signal line, that is, the TXP end is the positive pole of the transmitting end. The seventh end of the LAN terminal board J1 is electrically connected to the RXP end of the transceiver signal line, that is, the RXN end is the negative pole of the transmitting end. The eighth end of the LAN terminal board J1 is electrically connected to one end of the capacitor C23, and the other end of the capacitor C23 is grounded. The sixth end of the LAN terminal board J1 is electrically connected to one end of the resistor R19, and the other end of the resistor R19 is electrically connected to the power supply. The sixth end of the LAN terminal board J1 is electrically connected to one end of the resistor R18, and the other end of the resistor R18 is electrically connected to the power supply. The eighth end of the LAN terminal board J1 is electrically connected to one end of the resistor R20, and the other end of the resistor R20 is electrically connected to the power supply. The other end of the resistor R18 is electrically connected to the other end of the resistor R19, and the other end of the resistor R19 is electrically connected to the other end of the resistor R20. The ninth end of the LAN terminal board J1 is electrically connected to one end of the capacitor C26, and the other end of the capacitor C26 is grounded.

[0043] It should be noted that although the present application is used as an example to introduce the airborne power distribution unit for general aviation modification as above, those skilled in the art will understand that the present application should not be limited thereto. In fact, the user can flexibly set the parameters according to personal preferences and / or actual application scenarios, as long as they are reasonable.

[0044] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An airborne power distribution unit for general aviation modification, characterized in that: include: A relay, a main chip, a sampling voltage unit and a sampling current unit; the relay is electrically connected to the main chip, the main chip is electrically connected to the sampling current unit, and the sampling voltage unit is electrically connected to the relay; The sampling current unit comprises: a first resistor, a second resistor and a current follower; One end of the first resistor is electrically connected to pin 3 of the relay, one end of the first resistor is electrically connected to the IN+ pin of the main chip, and the other end of the first resistor is electrically connected to the IN- pin of the main chip; one end of the second resistor is electrically connected to the OUT pin of the main chip, and the other end of the second resistor is electrically connected to the current follower; The sampling voltage unit includes: a third resistor, a fourth resistor, a fifth resistor and a voltage follower; one end of the third resistor is electrically connected to pin 3 of the relay, the other end of the third resistor is electrically connected to one end of the fourth resistor, the other end of the fourth resistor is electrically connected to one end of the fifth resistor, and the other end of the fifth resistor is electrically connected to pin 5 of the voltage follower.

2. The airborne power distribution unit for general aviation modification according to claim 1, characterized in that: Also includes: Filter unit; The filtering unit comprises: a sixth resistor, a first capacitor and a second capacitor; One end of the sixth resistor is electrically connected to the other end of the second resistor, and the other end of the sixth resistor is electrically connected to pin 3 of the current follower; One end of the sixth resistor is electrically connected to one end of the first capacitor, the other end of the sixth resistor is electrically connected to one end of the second capacitor, the other end of the first capacitor is grounded, and the other end of the second capacitor is grounded.

3. The airborne power distribution unit for general aviation modification according to claim 1, characterized in that: It also includes: a third capacitor; one end of the third capacitor is electrically connected to the VS pin of the main chip, and the other end of the third capacitor is grounded.

4. The airborne power distribution unit for general aviation modification according to claim 1, characterized in that: It also includes: a fourth capacitor; one end of the fourth capacitor is electrically connected to pin 2 of the current follower, and the other end of the fourth capacitor is grounded.

5. The airborne power distribution unit for general aviation modification according to any one of claims 1 to 4, characterized in that: It also includes: a fifth capacitor; one end of the fifth capacitor is electrically connected to pin 3 of the relay, the other end of the fifth capacitor is electrically connected to pin 4 of the relay, and one end of the fifth capacitor is electrically connected to one end of the third resistor.

6. The airborne power distribution unit for general aviation modification according to claim 5, characterized in that: One end of the fifth capacitor is electrically connected to pin No. 1 of the output interface, and pin No. 2 of the output interface is electrically connected to one end of the first resistor.

7. The airborne power distribution unit for general aviation modification according to claim 6, characterized in that: Also includes: Seventh resistor and diode; One end of the seventh resistor is electrically connected to pin 1 of the output interface, the other end of the seventh resistor is electrically connected to one end of the diode, and the other end of the diode is grounded.

8. The airborne power distribution unit for general aviation modification according to claim 5, characterized in that: The model of the main chip is INA180.

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