Power distribution circuit and satellite

Abstract

The utility model discloses a power distribution circuit and a satellite, and the power distribution circuit is characterized in that the output ends of at least two power distribution state detection modules are connected with a switch control module, and the power distribution state detection modules are used for collecting power distribution state signals of detected equipment and transmitting the collected power distribution state signals to the switch control module; the different power distribution state detection module is used for collecting power distribution state signals of different detected devices; the output end of the switch control module is connected with the control end of the switch module; the switch control module is used for controlling the at least two switch modules to be in a set state when the at least two power distribution state detection signals are in a power distribution off state, and the set state is on or off; the switch module is connected with the power distribution control end of the power distribution state detection module, and the switch module is used for transmitting a power-on conduction signal to the power distribution control end in a set state, and controlling the power-on of the detected equipment. The power distribution circuit provided by the utility model re-powers on the tested devices under the condition that at least two tested devices are powered off.

Description

Technical Field

[0001] This utility model relates to the field of single-unit power distribution technology in space technology, and in particular to a power distribution circuit and a satellite. Background Technology

[0002] In space technology, satellite controllers provide power to individual units within the satellite payload. This individual unit power distribution is primarily achieved using relays controlling MOSFETs. The relays control the MOSFETs' control terminals to turn them on, thereby powering the entire satellite payload.

[0003] During satellite operation, situations may arise where the telemetry, tracking, and command (TT&C) units lose power, and the integrated electronics require a power-off restart. Current technology allows for simultaneous power outages of both the TT&C units and the integrated electronics, which could lead to loss of control of the entire satellite payload and prevent the satellite from functioning properly. Utility Model Content

[0004] This invention provides a power distribution circuit and a satellite to improve the situation where at least two tested units lose power simultaneously, ensuring the normal operation of subsequent satellite functions.

[0005] In a first aspect, the present invention provides a power distribution circuit, comprising: at least two power distribution status detection modules, a switch control module, and at least two switch modules;

[0006] The output terminal of the power distribution status detection module is connected to the switch control module. The power distribution status detection module is used to collect the power distribution status signal of the device under test and send the collected power distribution status signal to the switch control module. Different power distribution status detection modules are used to collect the power distribution status signals of different devices under test.

[0007] The output terminal of the switch control module is connected to the control terminal of the switch module; the switch control module is used to control the switch module to a set state when at least two of the power distribution status signals are in the power distribution off state, the set state being either an on state or an off state;

[0008] The switch module is connected to the power distribution control terminal of the power distribution status detection module. The switch module is used to transmit a power-on signal to the power distribution control terminal of the power distribution status detection module in the set state to control the device under test to be powered on.

[0009] Optionally, the power distribution status detection module further includes: a common terminal and a status transmission terminal;

[0010] The power distribution control terminal of the power distribution status detection module is connected to the power distribution command input terminal of the device under test, and is used to collect the power distribution status signal of the device under test;

[0011] The status transmitting terminal is connected to the input terminal of the switch control module;

[0012] The power distribution status detection module is used to enable or disable the connection between the common terminal and the status sending terminal based on the power distribution status signal.

[0013] The common terminal is connected to the reference voltage.

[0014] Optionally, the power distribution status detection module further includes: a power-on output terminal;

[0015] The power-on output terminal is connected to the power distribution switch of the device under test;

[0016] The power distribution status detection module is used to switch the conduction between the common terminal and the status sending terminal or the power-on output terminal according to the power distribution status signal of the device under test.

[0017] Optionally, the control terminal of the power distribution switch is connected to the power-on output terminal of the power distribution status detection module; the first terminal of the power distribution switch is connected to the power supply, and the second terminal of the power distribution switch is connected to the power supply terminal of the device under test; the power distribution switch is used to control the conduction state of the power distribution switch according to the signal received by the control terminal.

[0018] Optionally, the power distribution status detection module includes: a first coil, a second coil, a first contact terminal, a second contact terminal, and a third contact terminal;

[0019] The power distribution control terminal includes: a power-off command terminal and a power-on command terminal;

[0020] The first end of the first coil and the first end of the second coil are respectively connected to an external power source. The second end of the first coil is connected to the power-off command input terminal of the device under test. The second end of the second coil is connected to the power-on command input terminal of the device under test.

[0021] The first contact terminal is connected to the reference voltage, the second contact terminal is connected to the input terminal of the switch control module, and the third contact terminal is connected to the power-on output terminal of the power distribution status detection module.

[0022] The power distribution status detection module switches the conduction between the first contact terminal and the second contact terminal or the third contact terminal according to the energization status of the first coil and the second coil.

[0023] Optionally, the switch control module includes: a NOR logic circuit;

[0024] The input terminals of the NOR logic circuit are connected one-to-one with the output terminals of the power distribution status detection module; the output terminals of the NOR logic circuit are connected to the control terminals of the switching module.

[0025] The first terminal of the switch module is connected to the power distribution control terminal of the power distribution status detection module, and the second terminal of the switch module is grounded.

[0026] Optionally, the switching module includes: a transistor;

[0027] The collector of the transistor is connected to the power distribution control terminal of the power distribution status detection module, and the emitter of the transistor is grounded.

[0028] Optionally, the device under test includes the satellite's telemetry and control unit and integrated electronics.

[0029] Optionally, the power distribution circuit further includes: a diode;

[0030] The positive terminal of the diode is connected to the output terminal of the switch control module, and the negative terminal of the diode is connected to the control terminal of the switch module.

[0031] Secondly, the present invention provides a satellite, which includes the power distribution circuit described in any one of the embodiments of the present invention.

[0032] This utility model discloses a power distribution circuit and a satellite. The power distribution circuit includes at least two power distribution status monitoring modules that collect power distribution status signals from different devices under test. A switch control module controls the switch module to turn on or off based on the power distribution status signals. The switch module is connected to the power distribution control terminal of the power distribution status detection module. By turning the switch module on or off, the power-on status of the devices under test can be controlled. In the power distribution circuit provided by this utility model embodiment, when at least two devices under test are in a power-off state, the power distribution circuit can control the devices under test to be powered on again, ensuring the normal operation of the satellite. Thus, the power distribution circuit realizes the function of autonomous judgment and autonomous control of the power-on of the devices under test, providing an extra layer of protection for single-unit power supplies in the field of space technology. At the same time, in the backup power supply of data centers or the redundancy design of critical production lines, it can achieve the effect of preventing simultaneous power outages of two single units. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a power distribution circuit provided in an embodiment of the present utility model;

[0035] Figure 2This is a schematic diagram of another power distribution circuit provided in an embodiment of the present utility model;

[0036] Figure 3 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present utility model;

[0037] Figure 4 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present utility model;

[0038] Figure 5 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present utility model;

[0039] Figure 6 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present utility model;

[0040] Figure 7 This is a schematic diagram of the structure of a satellite provided in an embodiment of the present utility model. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Figure 1 This is a schematic diagram of a power distribution circuit provided in an embodiment of the present invention, as shown below. Figure 1As shown, the power distribution circuit includes: at least two power distribution status detection modules 101, a switch control module 102, and at least two switch modules 103; the output terminal of the power distribution status detection module 101 is connected to the switch control module 102, and the power distribution status detection module 101 is used to collect the power distribution status signal of the device under test and send the collected power distribution status signal to the switch control module 102. Different power distribution status detection modules 101 are used to collect the power distribution status signals of different devices under test; the output terminal of the switch control module 102 is connected to the control terminal of the switch module 103; the switch control module 102 is used to control the switch module 103 to a set state when at least two power distribution status signals are in the power distribution off state, and the set state is either in the on state or the off state; the switch module 103 is connected to the power distribution control terminal of the power distribution status detection module 101, and the switch module 103 is used to transmit a power-on signal to the power distribution control terminal of the power distribution status detection module 101 in the set state to control the device under test to power on.

[0044] Specifically, the power distribution circuit provided in this embodiment includes at least two power distribution status detection modules 101. The power distribution status detection module 101 collects the power distribution status signal of the device under test. Optionally, the power distribution status signal includes voltage, current, and power, used to determine whether the device is in a powered-on or powered-off state. For example, when the power distribution status signal is a voltage signal, a first level threshold is set. When the collected power distribution status signal is greater than the preset threshold, it indicates that the device under test is in a powered-on state; when the collected power distribution status signal is less than the preset threshold, it indicates that the device under test is in a powered-off state. The device under test is a satellite, a satellite payload unit, or other single-unit equipment in space technology, such as the satellite's telemetry and control unit and integrated electronics. At least two power distribution status detection modules 101 are set up to collect the power distribution status signals of at least two devices under test.

[0045] The switch control module 102 receives signals from the power distribution status detection module and determines whether the state of the switch module needs to be adjusted according to preset logic operation rules. Specifically, when at least two power distribution status signals are in the power distribution off state, the switch module 103 is controlled to be in the on or off state; for example, the switch module 103 is controlled to be in the on state. The switch module 103 is connected to the power distribution control terminal of the power distribution status detection module 101. According to the instructions of the switch control module, the switch module transmits corresponding control signals to the power distribution control terminal of the power distribution status detection module 101 to place the device under test into a power-on or power-off state. Optionally, the switch module 103 can be a relay, MOSFET, transistor, or other switching element. Further, each power distribution status detection module 101 collects power distribution status signals from at least one device under test, and each switch module 103 is connected to the power distribution control terminal of one power distribution status detection module 101 to control the power-on state of the device under test connected to the power distribution status detection module 101.

[0046] For example, when the power distribution circuit is operating, the power distribution status detection module 101 continuously monitors the power distribution status of the device under test. The switch control module 102 receives the power distribution status signal of the device under test, and when at least two power distribution status signals are in the power distribution off state, it controls the switch module 103 to the corresponding set state. In the set state, the switch module 103 transmits a power-on control signal to the power distribution control terminal of the power distribution status detection module 101, so that the device under test is powered on again.

[0047] This utility model embodiment provides a power distribution circuit in which at least two power distribution status monitoring modules collect power distribution status signals from different devices under test. A switch control module controls the switch module to turn on or off based on the power distribution status signals. The switch module is connected to the power distribution control terminal of the power distribution status detection module. By turning the switch module on or off, the power-on status of the devices under test can be controlled. In the power distribution circuit provided by this utility model embodiment, when at least two devices under test are in a power-off state, the power distribution circuit can control the devices under test to be powered on again, ensuring the normal operation of the satellite. Thus, the power distribution circuit enables the devices under test to autonomously determine and control their power-on, providing an extra layer of protection for single-unit power supplies in the field of space technology. Simultaneously, in data center backup power supplies or critical production line redundancy designs, it can achieve the effect of preventing simultaneous power outages of two single units.

[0048] Based on the above embodiments, Figure 2 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present invention, as shown below. Figure 2As shown, the power distribution status detection module 101 includes: a power distribution control terminal I1, a common terminal I2, and a status transmission terminal I3; the power distribution control terminal I1 of the power distribution status detection module 101 is connected to the power distribution command input terminal of the device under test, and is used to collect the power distribution status signal of the device under test; the status transmission terminal I3 is connected to the input terminal of the switch control module 102; the power distribution status detection module 101 is used to turn on or off the connection between the common terminal I2 and the status transmission terminal I3 according to the power distribution status signal; the common terminal I2 is connected to the reference voltage.

[0049] The power distribution status detection module 101 also includes: a power-on output terminal I4; the power-on output terminal I4 is connected to the power distribution switch 104 of the device under test; the power distribution status detection module 101 is used to switch the conduction between the common terminal I2 and the status sending terminal I3 or the power-on output terminal I4 according to the power distribution status signal of the device under test.

[0050] The power distribution circuit includes: the control terminal of the power distribution switch 104 is connected to the power-on output terminal I4 of the power distribution status detection module 101; the first terminal of the power distribution switch 104 is connected to the power supply, and the second terminal of the power distribution switch 104 is connected to the power supply terminal of the device under test; the power distribution switch 104 is used to control the power distribution switch 104 to a set state according to the signal received by the control terminal.

[0051] Specifically, in the power distribution status detection module 101, the power distribution control terminal I1 is connected to the power distribution command input terminal of the device under test. The power distribution control terminal I1 is used to collect the power distribution status signal of the device under test, that is, to monitor whether the device is in a powered-on or powered-off state. At the same time, the power distribution control terminal I1 is also connected to the output terminal of the switch module 103 to receive the power-on signal of the switch module 103. The common terminal I2 is connected to the reference voltage, which is a stable voltage source to provide a reference voltage. The status transmission terminal I3 is connected to the input terminal of the switch control module 102 and is used to transmit the judgment result of the power distribution status detection module 101 (i.e., whether the device is powered on) to the switch control module 102.

[0052] The power distribution command input terminal of the device under test is used to receive power distribution status signals that control the power-on status of the device under test. In the power distribution status detection module 101, the power distribution control terminal I1 is connected to the power distribution command input terminal of the device under test to receive the corresponding power distribution status signals of the device under test. Based on the received signals, the power distribution status detection module 101 determines whether there should be a connection between the common terminal I2 and the status sending terminal I3.

[0053] For example, when the power distribution status detection module 101 receives a power-off status signal, the common terminal I2 and the status transmitting terminal I3 are connected, and the power distribution status detection module 101 sends a signal to the switch control module 102. The voltage of this signal is a reference voltage, indicating that the device under test is in a power-off state. When the power distribution status detection module 101 receives a power-on status signal, the power distribution status detection module 101 determines that the connection between the common terminal I2 and the status transmitting terminal I3 should be closed, and it no longer sends a signal to the switch control module 102.

[0054] The power-on output terminal I4 of the power distribution status detection module 101 is connected to the power distribution switch 104 of the device under test. The power distribution status detection module 101 includes a status transmitting terminal I3 and a power-on output terminal I4. The power distribution status detection module 101 is used to switch the conduction between the common terminal I2 and the status transmitting terminal I3 or the power-on output terminal I4 according to the power distribution status signal of the device under test.

[0055] The power distribution switch 104 in the power distribution circuit is used to control the power distribution switch 104 to a set state according to the received signal, which is either a conducting state or a closed state. The power distribution switch 104 controls the power supply or de-energization of the device under test according to the received signal. For example, the power distribution status detection module 101 collects the corresponding power distribution status signal of the device under test. According to the power distribution status signal, the power distribution status detection module 101 switches the conduction between the common terminal I2 and the status sending terminal I3 or the power-on output terminal I4: when the power distribution status signal is a power-on status signal, the common terminal I2 and the power-on output terminal I4 are switched to conduction, the power distribution switch 104 receives a signal with a reference voltage, and the power distribution switch 104 controls the device under test to power on normally; when the power distribution status signal is a power-off status signal, the common terminal I2 and the status sending terminal I3 are switched to conduction, and the power distribution status is sent to the switch control module 102 through the status sending terminal I3.

[0056] Based on the above embodiments, Figure 3 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present invention, as shown below. Figure 3As shown, the power distribution status detection module 101 includes: a first coil, a second coil, a first contact terminal, a second contact terminal, and a third contact terminal; the power distribution control terminal I1 of the power distribution status detection module 101 includes: a power-off command terminal and a power-on command terminal; the first terminal I11 of the first coil and the first terminal I21 of the second coil are connected to an external power supply, the second terminal I12 of the first coil is connected to the power-off command input terminal of the device under test, and the second terminal I22 of the second coil is connected to the power-on command input terminal of the device under test; the first contact terminal is connected to a reference voltage, the second contact terminal is connected to the input terminal of the switch control module 102, and the third contact terminal is connected to the power-on output terminal I4 of the power distribution status detection module 101; the power distribution status detection module 101 switches the conduction between the first contact terminal and the second contact terminal or the third contact terminal according to the energization status of the first coil and the second coil.

[0057] Specifically, the power distribution status detection module 101 is a double-coil double-throw relay. Its common terminal I2 is grounded, its power-on output terminal I4 is connected to the power distribution switch 104 to control the power-on of the device under test, and its status transmission terminal I3 is connected to the switch control module 102. The double-coil double-throw relay has two coils. The first coil's first terminal I11 is connected to an external power supply, and its second terminal I12 is connected to the power-off command input terminal of the device under test; the second coil's second terminal I12 is also connected to an external power supply, and its second terminal I22 is connected to the power-on command input terminal of the device under test. The power distribution status detection module 101 switches the conduction between the first contact terminal and either the second or third contact terminal based on the energization status of the first and second coils.

[0058] For example, when a signal is input to the power-off command input terminal of the device under test, the first coil is energized. At this time, the double-throw switch control common terminal I2 of the power distribution status detection module 101 is connected to the status sending terminal I3, and the switch control module 102 receives the status signal of the device under test sent by the power distribution status detection module 101. When a signal is input to the power-on command input terminal of the device under test, the second coil is energized. At this time, the double-throw switch control common terminal I2 of the power distribution status detection module 101 is connected to the power-on output terminal I4, and the power distribution switch 104 receives the signal to control the device under test to power on.

[0059] Based on the above embodiments, the switch control module 102 includes: a NOR logic circuit; the input terminal of the NOR logic circuit is connected to the output terminal of the power distribution status detection module 101 in a one-to-one correspondence; and the output terminal of the NOR logic circuit is connected to the control terminal of the switch module 103.

[0060] Specifically, the characteristics of a NOR logic circuit are: the output is high only when all input signals are low; the output is low as long as at least one input signal is high. For example, when the switch control module 102 is a NOR logic circuit, it outputs a corresponding level signal based on the power-on state of at least two devices under test. When the power distribution of a device under test is in the off state, the signal output by the power distribution status detection module 101 is a low-level signal. That is, when all input signals of the switch control module 102 are low-level signals, meaning at least two devices under test are in a de-energized state, the switch control module 102 outputs a high-level signal. When at least one device under test is in the power distribution open state, the corresponding power distribution status detection module 101 collects and outputs a high-level signal. If at least one input signal received by the control switch module 103 is high-level, then the switch module outputs a low-level signal. When the switch control module 102 is a NOR logic circuit, it can output a low-level signal when at least one device under test is powered on and a high-level signal when all devices under test are de-energized. Correspondingly, the switch module 103 is set to a set state according to the high or low level signal output by the switch control module 102, and the set state is either the on state or the off state.

[0061] Furthermore, when the control terminal of the switch module 103 receives a high-level signal, the switch module 103 is in a conducting state; when the control terminal of the switch module 103 receives a low-level signal, the switch module 103 is in a closed state. When the switch module 103 is conducting, it can control the device under test to power on again. This achieves the goal that when all devices under test are in a closed state, the power distribution circuit provided in this embodiment can power on the devices under test again. It enables the device under test to autonomously determine and control its power-on.

[0062] Based on the above embodiments, Figure 4 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the switch module 103 includes: a first terminal of the switch module 103 connected to the power distribution control terminal of the power distribution status detection module 101, and a second terminal of the switch module 103 grounded. The switch module 103 includes: a transistor; the collector of the transistor is connected to the power distribution control terminal of the power distribution status detection module 101, and the emitter of the transistor is grounded.

[0063] Specifically, the switch module 103 is connected in series between ground and the power distribution control terminal of the power distribution status detection module 101. When the switch module 103 receives the output signal from the switch control module 102, the switch module 103 is turned on, and the power distribution control terminal of the power distribution status detection module 101 is grounded. This enables the switch control module 102 to control the device under test to power on again. For example, the switch module 103 is a transistor, and the collector of the transistor serves as the control terminal of the switch module 103, controlled by the switch control module 102. When the switch control module 102 outputs a high-level signal, the collector and emitter of the transistor in the switch module 103 are connected, the power distribution control terminal of the power distribution status detection module 101 is grounded, and thus the device under test is powered on again. Based on the above embodiments, Figure 5 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the power distribution circuit also includes: diode 105; the positive terminal of diode 105 is connected to the output terminal of switch control module 102, and the negative terminal of diode 105 is connected to the control terminal of switch module 103.

[0064] Specifically, a diode 105 is connected in series between the switch module 103 and the switch control module 102. The diode has unidirectional conductivity. When the switch control module 102 is turned off, if there are inductive components (such as motors, transformers, etc.) in the load, a reverse electromotive force will be generated due to the energy storage characteristics of the inductor. The diode 105 can protect the switch control module 102 and the switch module 103 from the impact of the reverse current.

[0065] Based on the above embodiments, Figure 6 This is a schematic diagram of another power distribution circuit provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the power distribution circuit includes at least two power distribution status detection modules 101. Each power distribution status detection module 101 includes two coils: a first coil collects the power-off command signal from the device under test (DUT), and a second coil collects the power-on command signal from the DUT. The energization status of the first and second coils controls the conduction or de-energization of the common terminal I2, status transmitting terminal I3, and power-on output terminal I4 of the power distribution status detection module 101. The status transmitting terminal I3 is connected to the input terminal of the switch control module 102, which in this embodiment is a NOR gate logic circuit. The power-on output terminal I4 is connected to the power distribution switch 104 of the DUT, which in this embodiment is a switching transistor. In this embodiment, the common terminal I2 is grounded. The output terminal of the switch control module 102, after being connected in series with a diode 105, is connected to the input terminal of the switch module 103. In this embodiment, the switch module 103 is a transistor. The collector of the transistor is connected to the power-on command terminal of the DUT, and the emitter of the transistor is grounded.

[0066] Furthermore, the power distribution circuit in this embodiment also includes a reference circuit 106, which is used to send a reference voltage to the switch control module 102 when the status transmitting terminal I3 is floating. The first terminal of the reference circuit 106 is connected to the status transmitting terminal I3 of the power distribution status detection module 101, and the second terminal of the reference circuit 106 is connected to the input terminal of the switch control module 102.

[0067] For example, in this embodiment of the present invention, when all tested devices are in a power-off state, the first coil of the power distribution status detection module 101 is energized, controlling the common terminal I2 of the power distribution status detection module 101 to conduct with the status transmitting terminal I3. Therefore, all input signals of the switch control module 102 are low-level signals, and the switch control module 102 outputs a high-level signal to the collector of the transistor in the switch module 103. When the transistor in the switch module 103 conducts, the power distribution control terminals of all power distribution status detection modules 101 are grounded. Figure 6 In the first test, the second coil of the power distribution status detection module 101 is grounded at its second terminal I22, energizing the second coil and connecting the common terminal I2 of the module to the power-on output terminal I4. The gate of the switching transistor in the power distribution switch 104 is grounded, turning the transistor on and re-energizing all devices under test. When at least one device under test is energized, the second coil of the power distribution status detection module 101 is energized, connecting the common terminal I2 to the power-on output terminal I4 and grounding the gate of the switching transistor in the power distribution switch 104, turning the transistor on. The device under test is then powered on normally. Due to the reference circuit 106, the input terminal of the switch control module 102 receives at least one high-level signal, therefore, the switch control module 102 outputs a low-level signal. Thus, the switch module 103 is not energized.

[0068] This utility model embodiment provides a power distribution circuit, including at least two power distribution status detection modules. Each power distribution status detection module collects power-off and power-on command signals from the device under test (DUT) via two coils, thereby controlling the connection or disconnection of the common terminal with the status transmitting terminal and the power-on output terminal. The status transmitting terminal is connected to a switch control module, and the power-on output terminal is connected to the power distribution switch of the DUT. Furthermore, the circuit includes a reference circuit for sending a reference voltage to the switch control module when the status transmitting terminal is floating. When all DUTs are in a power-off state, the power distribution status detection module controls the common terminal to connect with the status transmitting terminal, causing the switch control module to output a high-level signal, thereby turning on the switch module and re-powering all DUTs. When at least one DUT is in a power-on state, the power distribution status detection module controls the common terminal to connect with the power-on output terminal, turning on the power distribution switch and powering on the DUTs normally; simultaneously, due to the reference circuit, the switch control module outputs a low-level signal, and the switch module does not connect. The power distribution circuit provided by this utility model embodiment enables power-on when all DUTs are power-off. It enables the tested equipment to autonomously judge and control its power-on, providing an extra layer of protection for the power supply of individual satellite units in the field of space technology.

[0069] Based on the above embodiments, Figure 7 This is a schematic diagram of the structure of a satellite provided in an embodiment of the present invention, as shown below. Figure 7 As shown, satellite 02 includes the power distribution circuit 01 in any of the above embodiments.

[0070] In the satellite of this embodiment, the power distribution circuit can automatically repower the devices under test when it detects that at least two devices are in a power-off state. This ensures the reliable restart of critical equipment in the satellite and the continuity of the system. The automatic power-on function of the power distribution circuit enhances the self-recovery capability of the satellite system. In the space environment, satellites may be affected by various external factors, leading to unexpected power outages. The power distribution circuit can automatically detect this state and attempt to repower the devices, thereby reducing the need for manual intervention and improving the autonomy and reliability of the satellite.

[0071] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0072] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power distribution circuit, characterized by, The utility model relates to a power distribution state detection module, switch control module and switch module, and the switch control module is connected with the switch module. The power distribution state detection module is connected with the switch control module, and the power distribution state detection module is used for collecting the power distribution state signal of the measured equipment and sending the collected power distribution state signal to the switch control module. The switch control module is connected with the control end of the switch module, and the switch control module is used for controlling the switch module to be in the set state when the power distribution state signal is in the power distribution closing state. The switch module is connected with the power distribution control end of the power distribution state detection module, and the switch module is used for transmitting the power-on signal to the power distribution control end of the power distribution state detection module in the set state to control the power-on of the measured equipment. The power distribution state detection module further comprises a common end and a state sending end.

2. The power distribution circuit of claim 1, wherein, The power distribution control end of the power distribution state detection module is connected with the power distribution instruction input end of the measured equipment, and is used for collecting the power distribution state signal of the measured equipment. The state sending end is connected with the input end of the switch control module. The power distribution state detection module is used for switching the conduction between the common end and the state sending end according to the power distribution state signal. The common end is connected with the reference voltage. The power distribution state detection module further comprises a power-on output end.

3. The power distribution circuit of claim 2, wherein, The power-on output end is connected with the power distribution switch of the measured equipment. The power distribution state detection module is used for switching the conduction between the common end and the state sending end or the power-on output end according to the power distribution state signal of the measured equipment. The control end of the power distribution switch is connected with the power-on output end of the power distribution state detection module.

4. The power distribution circuit of claim 3, wherein, The first end of the power distribution switch is connected with the power supply, and the second end of the power distribution switch is connected with the power supply end of the measured equipment.

5. The power distribution circuit of claim 3, wherein, The power distribution state detection module comprises a first coil, a second coil, a first contact end, a second contact end and a third contact end. The power distribution control end comprises a power-off instruction end and a power-on instruction end. The first end of the first coil and the first end of the second coil are respectively connected with the external power supply. The first contact end is connected with the reference voltage, the second contact end is connected with the input end of the switch control module, and the third contact end is connected with the power-on output end of the power distribution state detection module. The power distribution state detection module switches the conduction between the first contact end and the second contact end or the third contact end according to the power-on state of the first coil and the second coil.

6. The power distribution circuit of claim 1, wherein, The switch control module comprises an or non-logic circuit. The input end of the or non-logic circuit is connected with the output end of the power distribution state detection module one by one, and the output end of the or non-logic circuit is connected with the control end of the switch module. The first end of the switch module is connected with the power distribution control end of the power distribution state detection module, and the second end of the switch module is grounded.

7. The power distribution circuit of claim 6, wherein, The switch module comprises a triode. The collector of the triode is connected with the power distribution control end of the power distribution state detection module, and the emitter of the triode is grounded.

8. The power distribution circuit of claim 1, wherein, The measured equipment comprises a satellite's TT&C unit and integrated electronics.

9. The power distribution circuit of claim 1, wherein, The power distribution circuit further comprises a diode. The positive pole of the diode is connected with the output end of the switch control module, and the negative pole of the diode is connected with the control end of the switch module.

10. A satellite, characterized by The satellite comprises the power distribution circuit according to any one of claims 1-9.

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