CN218678802U - Power management system applied to occultation detection system - Google Patents

Abstract

The utility model provides a be applied to occultation detection system's power management system, including power pretreatment module, current monitoring module and power conversion module, current monitoring module input is connected to treatment module before the power, current monitoring module output is connected to power conversion module's input, power conversion module's output is connected to occultation detection system and satellite platform respectively. The utility model discloses beneficial effect: the system adopts a highly reliable power supply system with flight experience to complete filtering, monitoring and the like of a power supply, the front end of part of the power supply is provided with a current-limiting resistor, when the current is overlarge, the power supply chip can automatically cut off the power supply, and system faults caused by overlarge current are avoided.

Description

Power management system applied to occultation detection system

Technical Field

The utility model belongs to the technical field of power management equipment, especially, relate to a be applied to occultation detection system's power management system.

Background

In recent years, satellite platforms gradually develop towards miniaturization and high reliability, occultation detection by using small satellite platforms becomes one of hot spots developed at home and abroad, the existing occultation detection system generally adopts a power management system to realize a correlator, rapid capture, a signal processing loop, positioning calculation, orbit determination, occultation observation and the like, but the existing power management system has low reliability, cannot monitor a power supply, has the problem of occultation detection system fault caused by overlarge current, and further greatly influences the work of the occultation detection system.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a be applied to occultation detection system's power management system to solve current power management system reliability low, can't monitor the power, there is the problem because the electric current causes occultation detection system trouble greatly.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a power supply management system applied to a occultation detection system comprises a power supply pretreatment module, a current monitoring module and a power supply conversion module, wherein the input end of the current monitoring module is connected to the power supply pretreatment module, the output end of the current monitoring module is connected to the input end of the power supply conversion module, and the output end of the power supply conversion module is respectively connected to the occultation detection system and a satellite platform;

the power supply conversion module comprises a first path of current conversion unit, a second path of current conversion unit and a third path of current conversion unit, wherein the input ends of the first path of current conversion unit, the second path of current conversion unit and the third path of current conversion unit are all connected to the output end of the current monitoring module, the output end of the first path of current conversion unit is connected to the baseband processing unit through an LDO conversion chip, the output end of the second path of current conversion unit is connected to the interface control unit through the LDO conversion chip, the output end of the second path of current conversion unit is further connected to the satellite platform, and the output end of the third path of current conversion unit is connected to the radio frequency processing unit.

Further, the current monitoring module comprises a sampling resistor, an amplifying chip, a control unit and a load circuit, wherein the sampling resistor is connected with the amplifying chip in parallel, the output end of the sampling resistor is connected to the input end of the control unit and the input end of the power conversion module, the output end of the control unit is connected to the input end of the power conversion module, and the output end of the power conversion module is connected to the load circuit.

Furthermore, the power supply pretreatment module comprises an overcurrent protection unit, a surge suppression unit and a filtering unit, wherein the input end of the surge suppression unit is connected to the overcurrent protection unit, the output end of the surge suppression unit is connected to the input end of the filtering unit, and the output end of the filtering unit is respectively connected to the first path of current conversion unit, the second path of current conversion unit and the third path of current conversion unit.

Further, the overcurrent protection unit comprises a fuse F2, a fuse F4, a resistor R561, a resistor R564 and a resistor R1499, the resistor R561, the resistor R564 and the resistor R1499 are connected in parallel, the input ends of the resistor R561, the resistor R564 and the resistor R1499 are connected with a 12V input power supply, the output ends of the input ends of the resistor R561, the resistor R564 and the resistor R1499 are connected with one end of the fuse F4, the other end of the fuse F4 is connected with the surge suppression unit, one end of the fuse F2 is connected with the 12V input power supply, and the other end of the fuse F2 is connected with the surge suppression unit.

Further, the surge suppression unit comprises a Q1 chip, a capacitor C845, a capacitor C865, a capacitor C866, a capacitor C867, a resistor R565, a resistor R569, a resistor R566, a resistor R659 and a resistor R1301, wherein one ends of the resistor R659 and the resistor R1301 are grounded, the other ends of the resistor R659 and the resistor R1301 are connected with one end of the resistor R659, the other end of the resistor R659 is connected with one end of the resistor R565, one end of the capacitor C865, the Q1 chip G pin and one end of the capacitor C866 respectively, the other end of the resistor R565 is connected with the Q1 chip S pin, the other end of the capacitor C865 is connected with the Q1 chip S pin through the capacitor C845, and the other end of the capacitor C866 is connected with the Q1 chip D through the resistor R566 in sequence.

Furthermore, the first path of current conversion unit is used for converting 12V into 4.0V, 3.3V,1.8V and 1.0V respectively, the first path of current conversion unit comprises a resistor 1416, a resistor 1418, a resistor 1417, a resistor 1420, a second amplification chip, a capacitor C1685, a capacitor C1686, a capacitor C1687, a capacitor C1688, a resistor 1477, a resistor 1478, a resistor 1470, a resistor 1428, a resistor 1436, a resistor 1442, a capacitor C1689, a capacitor C1604, a capacitor C1699, a capacitor C1704, a resistor 1423, a resistor 1425, a resistor 1429, a resistor 1431, a resistor 1437, a resistor 1439, a resistor 1443, a capacitor C1689, a capacitor C1699, a capacitor C1704, a capacitor C1683, a capacitor C1, a resistor 1437, a resistor 1439, a resistor 1443, a capacitor C resistance 1445, capacitance C1681, capacitance C1682, capacitance C1683, capacitance C1684, capacitance C1690, capacitance C1691, capacitance C1692, capacitance C1693, capacitance C1695, capacitance C1696, capacitance C1697, capacitance C1698, capacitance C1700, capacitance C1701, capacitance C1702, capacitance C1703, resistance 1421, resistance 1422, resistance 1424, resistance 1426, resistance 1467, resistance 1430, resistance 1433, resistance 1434, resistance 1438, resistance 1440, resistance 1441, and resistance 1444.

Furthermore, the circuit output end of the second current conversion unit outputs a 5.2V power supply, the output 5.2V power supply is divided into two paths through a divider resistor, one path is converted into a 3.3V power supply through an LDO conversion chip, the 3.3V power supply is used for supplying power to the interface control unit, and the other path is used for supplying power to the satellite platform.

Further, the second current converting unit and the third current converting unit are both used for converting 12V to 5.2V, the circuits of the second current converting unit and the third current converting unit are the same, and the second current converting unit includes a resistor 1480, a resistor 1481, a capacitor C883, a capacitor C884, a capacitor C885, a capacitor C886, a capacitor C890, a resistor 1486, a resistor 1497, a resistor 1498, a chip U127, an inductor, a resistor 1611, a resistor 1612, a resistor 1610, a capacitor C887, a capacitor C889, a capacitor C888, a resistor 1398, a resistor 1399, and a chip U198.

Compared with the prior art, a be applied to occultation detection system's power management system have following advantage:

(1) A be applied to power management system who hides star detecting system, the system adopts highly reliably, has the power supply system of flight experience, accomplishes the filtering of power, control etc. and partial power front end has current-limiting resistance, when the electric current is too big, this power chip can the auto-power-off, avoids because the electric current causes system's trouble greatly.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of the overall structure of an embodiment of the present invention;

fig. 2 is a schematic diagram of a current monitoring module according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of a sampling resistor and an amplifying chip according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an overcurrent protection unit and a surge suppression unit according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a first path current converting unit according to an embodiment of the present invention;

FIG. 6 is an enlarged view A of FIG. 5;

FIG. 7 is an enlarged view of B in FIG. 5;

FIG. 8 is an enlarged view of C in FIG. 5;

fig. 9 is a schematic diagram of a second path current converting unit according to an embodiment of the present invention;

FIG. 10 is an enlarged view of D in FIG. 9;

fig. 11 is an enlarged view of E in fig. 9.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, a power management system applied to a occultation detection system includes a power preprocessing module, a current monitoring module and a power conversion module, wherein an input end of the current monitoring module is connected to the power preprocessing module, an output end of the current monitoring module is connected to an input end of the power conversion module, and an output end of the power conversion module is respectively connected to the occultation detection system and a satellite platform;

the power supply conversion module comprises a first path of current conversion unit, a second path of current conversion unit and a third path of current conversion unit, wherein the input ends of the first path of current conversion unit, the second path of current conversion unit and the third path of current conversion unit are all connected to the output end of the current monitoring module, the output end of the first path of current conversion unit is connected to the baseband processing unit through an LDO conversion chip, the output end of the second path of current conversion unit is connected to the interface control unit through the LDO conversion chip, the output end of the second path of current conversion unit is further connected to the satellite platform, and the output end of the third path of current conversion unit is connected to the radio frequency processing unit.

As shown in fig. 1, which is a connection diagram of a power management module, the power management module mainly comprises an overcurrent protection unit, a surge suppression unit, a filtering unit, a current monitoring module (fig. 2-3), a power conversion module, and the like, the power conversion module mainly comprises two 12V-5.2V circuits, one path of power is supplied to the correlator processing unit (one path is divided into power to the satellite platform for monitoring the correlator), the other path of power is supplied to the radio frequency processing unit, the other path of power is 12V to 4.0V, the other path of power is 12V to 3.3V, the other path of power is 12V to 1.8V, the other path of power is 12V to 1.0V, the overcurrent protection unit is mainly used for protecting the overcurrent of the back-end system (the back-end system refers to load units of 12V to 5V, 3.3V,1.8V and 1.0V), the fuse is fused, the safety of the primary power supply bus can be protected, the surge suppression unit mainly suppresses the surge power supply on the primary power supply bus when the system is powered on, the filtering unit mainly completes filtering of the input power supply and ensures the stability of the input power supply, the current monitoring module is mainly used for monitoring the current of the correlator processing unit, the baseband processing unit and the radio frequency processing unit in the system, when the internal module of the occultation detection system is abnormal, the interface control unit of the occultation detection system can perform power-on and power-off operation on the power supply unit so as to prevent system faults caused by overcurrent, the internal of the satellite platform is provided with a voltage monitoring unit, the system is used for collecting and monitoring the power supply voltage of the interface control unit, when the power supply voltage of the interface control unit is abnormal (the block mainly refers to that telemetering voltage is supplied to a satellite platform in a block diagram, and the power supply voltage of the interface control unit is monitored through the satellite platform), the satellite platform carries out power on and off operation on the whole system, the first path output in figure 1 is 4.0V, and the first path output in total has 4 paths of output.

The utility model relates to an in the preferred embodiment, current monitoring module includes sampling resistor, an amplifier chip, the control unit and load circuit, sampling resistor connects in parallel an amplifier chip respectively, sampling resistor's output is connected to respectively the control unit input, power conversion module input, the control unit output still is connected to power conversion module input, power conversion module output is connected to load circuit. The sampling resistor is a resistor R1406 and a resistor R1407, and the model of the first amplification chip is MAX9938.

As shown in fig. 2-fig. 3, the current monitoring module mainly comprises sampling resistors (R1406, R1407), an amplifying part (MAX 9938), a control unit and a load circuit, wherein a primary power input passes through 0 ohm resistors R1055, R1056, the 0 ohm resistors are connected in series, mainly for disconnecting the part of the circuit from other parts sharing the primary power during a later test, determining the current of the part of the load circuit, so as to set the upper and lower thresholds of the monitoring current, conventionally, the load current is about 0.3A, the sampling voltage is about 0.021V through two parallel 0.14 ohm resistors, after being amplified by a MAX9938 circuit, the 2.1V voltage is input to the control unit (the control unit is an ARM processor, the block of the sampling voltage is output to an ADC pin of the ARM processor after being amplified, the ARM processor is AD-converted into a digital signal for monitoring the voltage, thereby monitoring the power supply), when the rear end load current is changed, the corresponding sampling voltage value is changed when the value is too large or too small, if the set threshold value is exceeded, the control unit turns off the STM chip, thereby preventing the fault system from being damaged (F32 ).

The utility model relates to an in the preferred embodiment, processing module includes overcurrent protection unit, surge suppression unit and filtering unit before the power, the input of surge suppression unit is connected to overcurrent protection unit, the output of surge suppression unit is connected to the filtering unit input, and the filtering unit output is connected to first current conversion unit, second current conversion unit and third current conversion unit all the way respectively.

The utility model relates to an in the preferred embodiment, the overcurrent protection unit includes fuse F2, fuse F4, resistance R561, resistance R564, resistance R1499 three are parallelly connected, resistance R561, resistance R564, resistance R1499 input termination 12V input power, the output termination fuse F4 one end of resistance R561, resistance R564, resistance R1499 input, fuse F4 another termination surge suppression unit, fuse surge F2's a termination 12V input power, another termination suppression unit.

The utility model relates to an in the preferred embodiment, surge suppression unit includes Q1 chip, electric capacity C845, electric capacity C865, electric capacity C866, electric capacity C867, resistance R565, resistance R569, resistance R566, resistance R659, resistance R1301 one end are all grounded, and resistance R659, resistance R1301 other end are all connected resistance R659 one end, and the resistance R659 other end is connected resistance R565 one end, electric capacity C865 one end, Q1 chip G pin, electric capacity C866 one end respectively, and another termination Q1 chip S pin of resistance R565, the electric capacity C865 other end connects Q1 chip S pin through electric capacity C845, and the electric capacity C866 other end loops through resistance R566 and connects Q1 chip D pin.

FIG. 4: overcurrent protection and surge suppression unit circuit (overcurrent protection: a circuit composed of F2F4R561R564R 1499; surge suppression: a circuit composed of Q1 and surrounding resistor-capacitor): overcurrent protection and surge suppression mainly ensure the safety and reliability of an input primary power bus;

f2, F4 are the fuse, this circuit is the design of nonequilibrium parallel connection, wherein the 3 0.5 ohm resistance of F4 front end series-parallel, when normal use, current passes through F2 about 95%, appear the fuse such as maloperation in the use, F4 can regard as the backup to use, normally provide the power supply for rear end load circuit, guarantee the reliability of system, the surge suppression circuit who uses the MOS pipe as the core has been adopted among the power supply circuit, the voltage climbing time when surge suppression circuit is used for prolonging circuit power-on, reduce the instantaneous surge current peak value of power-on, prevent that primary power supply from receiving the abnormal or damage of work of influence, prevent simultaneously that the electric current is too big to damage the fuse in the power-on process.

In a preferred embodiment of the present invention, the first path current converting unit is used for converting 12V into 4.0V, 3.3V,1.8V and 1.0V respectively, the first path of current conversion unit comprises a resistor 1416, a resistor 1418, a resistor 1417, a resistor 1420, a second amplification chip, a capacitor C1685, a capacitor C1686, a capacitor C1687, a capacitor C1688, a resistor 1477, a resistor 1478, a resistor 1470, a resistor 1428, a resistor 1436, a resistor 1442, a capacitor C1689, a capacitor C1604, a capacitor C1699, a capacitor C1704, a resistor 1423, a resistor 1425, a resistor 1429, a resistor 1431, a resistor 1437, a resistor 1439, a resistor 1443, a capacitor C1689, a capacitor C1699, a capacitor C1704, a capacitor C1683, a capacitor C1, a resistor 1437, a resistor 1439, a resistor 1443, a capacitor C resistance 1445, capacitance C1681, capacitance C1682, capacitance C1683, capacitance C1684, capacitance C1690, capacitance C1691, capacitance C1692, capacitance C1693, capacitance C1695, capacitance C1696, capacitance C1697, capacitance C1698, capacitance C1700, capacitance C1701, capacitance C1702, capacitance C1703, resistance 1421, resistance 1422, resistance 1424, resistance 1426, resistance 1467, resistance 1430, resistance 1433, resistance 1434, resistance 1438, resistance 1440, resistance 1441, and resistance 1444.

Fig. 5 to 8:12V to 4.0V, 3.3V,1.8V,1.0V units: the method is characterized in that a high-reliability power chip LTM4644 is adopted, the LTM4644 is a simple and easy-to-use synchronous buck DC-DC converter, 4 paths of power supplies can be output simultaneously, each path of output current reaches 4A, the EN pin of the chip is subjected to voltage division processing through resistors R1478 and R1479, the power supply is enabled in a power-on default mode, an enabling signal is subjected to power-on and power-off control through a resistor R1477, after the 4.0V power supply of a baseband processing unit is powered on, a PGOOD signal of a channel 1 outputs a power supply power-on enabling signal of 1.0V of a control channel 2 through a resistor R1425, a PGOOD signal of the channel 2 controls the power supply power-on enabling of 1.8V of the channel 3 through a resistor R1431, a PGOOD signal of the channel 3 controls the power supply power-on enabling of 3V of the channel 4 through a resistor R1439, and the power chip finishes power supply power-on time sequence control of correlator processing units through power-on enabling signals.

The utility model relates to an in the preferred embodiment, the circuit output end output 5.2V power of second way current conversion unit, the 5.2V power of output falls into two the tunnel through divider resistance, and one way is passed through LDO conversion chip and is converted into the 3.3V power, and the 3.3V power is used for supplying power for interface control unit, gives the satellite platform power supply all the way.

In a preferred embodiment of the present invention, the second current converting unit and the third current converting unit are both used to convert 12V into 5.2V, the circuit of the second current converting unit is the same as that of the third current converting unit, and the second current converting unit includes a resistor 1480, a resistor 1481, a capacitor C883, a capacitor C884, a capacitor C885, a capacitor C886, a capacitor C890, a resistor 1486, a resistor 1497, a resistor 1498, a chip U127, an inductor, a resistor 1611, a resistor 1612, a resistor 1610, a capacitor C887, a capacitor C889, a capacitor C888, a resistor 1398, a resistor 1399, and a chip U198.

Fig. 9 to fig. 11:12V to 5.2V unit: the high-reliability power supply chip TPS62130 of TI company is adopted, the TPS62130 is a simple and easy-to-use synchronous buck DC-DC converter, the output current is up to 3A, the EN pin of the chip is subjected to voltage division processing through resistors R1408 and R1407, the power is on for default enabling, an enabling signal is subjected to power on and power off control through a resistor R1486, the voltage is adjusted through resistors R610 and R612 to output 5.2V, the output end is connected in series and in parallel with resistors R1308 and R1309, the resistance value is 0.05 ohm, current collection is carried out, the current is input to an interface control unit after being put through a chip MAX9938 (LDC chip) to monitor the power supply current, capacitors C883, C884, C885 and C886 are input end power supply filter capacitors, C887, C889 and C888 are output end filter capacitors, and the stability of the power supply is ensured.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a be applied to power management system of occultation detection system, power management system installs to occultation detection system and satellite platform, occultation detection system includes baseband processing unit, interface control unit and radio frequency processing unit, radio frequency processing unit input termination occultation signal, radio frequency processing unit output termination the input of baseband processing unit, baseband processing unit output termination satellite platform which characterized in that: the device comprises a power supply pretreatment module, a current monitoring module and a power supply conversion module, wherein the input end of the current monitoring module is connected to the power supply pretreatment module, the output end of the current monitoring module is connected to the input end of the power supply conversion module, and the output end of the power supply conversion module is respectively connected to a occultation detection system and a satellite platform;

the power supply conversion module comprises a first path of current conversion unit, a second path of current conversion unit and a third path of current conversion unit, wherein the input ends of the first path of current conversion unit, the second path of current conversion unit and the third path of current conversion unit are all connected to the output end of the current monitoring module, the output end of the first path of current conversion unit is connected to the baseband processing unit through an LDO conversion chip, the output end of the second path of current conversion unit is connected to the interface control unit through the LDO conversion chip, the output end of the second path of current conversion unit is further connected to the satellite platform, and the output end of the third path of current conversion unit is connected to the radio frequency processing unit.

2. The power management system applied to the occultation detection system according to claim 1, wherein: the current monitoring module comprises a sampling resistor, an amplifying chip, a control unit and a load circuit, wherein the sampling resistor is connected with the amplifying chip in parallel, the output end of the sampling resistor is connected with the input end of the control unit and the input end of the power conversion module, the output end of the control unit is connected with the input end of the power conversion module, and the output end of the power conversion module is connected with the load circuit.

3. The power management system applied to the occultation detection system according to claim 1, wherein: the power supply pretreatment module comprises an overcurrent protection unit, a surge suppression unit and a filtering unit, wherein the input end of the surge suppression unit is connected to the overcurrent protection unit, the output end of the surge suppression unit is connected to the input end of the filtering unit, and the output end of the filtering unit is respectively connected to the first path of current conversion unit, the second path of current conversion unit and the third path of current conversion unit.

4. The power management system applied to the occultation detection system according to claim 3, wherein: the overcurrent protection unit comprises a fuse F2, a fuse F4, a resistor R561, a resistor R564 and a resistor R1499, the resistor R561, the resistor R564 and the resistor R1499 are connected in parallel, the input ends of the resistor R561, the resistor R564 and the resistor R1499 are connected with a 12V input power supply, the output ends of the input ends of the resistor R561, the resistor R564 and the resistor R1499 are connected with one end of the fuse F4, the other end of the fuse F4 is connected with the surge suppression unit, one end of the fuse F2 is connected with the 12V input power supply, and the other end of the fuse F2 is connected with the surge suppression unit.

5. The power management system applied to the occultation detection system according to claim 3, wherein: the surge suppression unit comprises a Q1 chip, a capacitor C845, a capacitor C865, a capacitor C866, a capacitor C867, a resistor R565, a resistor R569, a resistor R566, a resistor R659 and a resistor R1301, wherein one ends of the resistor R659 and the resistor R1301 are grounded, the other ends of the resistor R659 and the resistor R1301 are connected with one end of the resistor R659, the other end of the resistor R659 is connected with one end of the resistor R565, one end of the capacitor C865, one end of a Q1 chip G pin and one end of the capacitor C866 respectively, the other end of the resistor R565 is connected with a Q1 chip S pin, the other end of the capacitor C865 is connected with the Q1 chip S pin through the capacitor C845, and the other end of the capacitor C866 is connected with a Q1 chip D pin through the resistor R566 sequentially.

6. The power management system applied to the occultation detection system according to claim 1, wherein: the first path of current conversion unit is used for converting 12V into 4.0V, 3.3V,1.8V and 1.0V respectively, the first path of current conversion unit comprises a resistor 1416, a resistor 1418, a resistor 1417, a resistor 1420, a second amplification chip, a capacitor C1685, a capacitor C1686, a capacitor C1687, a capacitor C1688, a resistor 1477, a resistor 1478, a resistor 1470, a resistor 1428, a resistor 1436, a resistor 1442, a capacitor C1689, a capacitor C1604, a capacitor C1699, a capacitor C1704, a resistor 1423, a resistor 1425, a resistor 1429, a resistor 1431, a resistor 1437, a resistor 1439, a resistor 1443, a capacitor C1689, a capacitor C1699, a capacitor C1704, a capacitor C1683, a capacitor C1, a resistor 1437, a resistor 1439, a resistor 1443, a capacitor C resistance 1445, capacitance C1681, capacitance C1682, capacitance C1683, capacitance C1684, capacitance C1690, capacitance C1691, capacitance C1692, capacitance C1693, capacitance C1695, capacitance C1696, capacitance C1697, capacitance C1698, capacitance C1700, capacitance C1701, capacitance C1702, capacitance C1703, resistance 1421, resistance 1422, resistance 1424, resistance 1426, resistance 1467, resistance 1430, resistance 1433, resistance 1434, resistance 1438, resistance 1440, resistance 1441, and resistance 1444.

7. The power management system applied to the occultation detection system according to claim 1, wherein: the output end of the circuit of the second current conversion unit outputs a 5.2V power supply, the output 5.2V power supply is divided into two paths through a divider resistor, one path is converted into a 3.3V power supply through an LDO conversion chip, the 3.3V power supply is used for supplying power to the interface control unit, and the other path is used for supplying power to the satellite platform.

8. The power management system applied to the occultation detection system according to claim 1, wherein: the second current converting unit and the third current converting unit are both used for converting 12V into 5.2V, the circuits of the second current converting unit and the third current converting unit are the same, and the second current converting unit comprises a resistor 1480, a resistor 1481, a capacitor C883, a capacitor C884, a capacitor C885, a capacitor C886, a capacitor C890, a resistor 1486, a resistor 1497, a resistor 1498, a chip U127, an inductor, a resistor 1611, a resistor 1612, a resistor 1610, a capacitor C887, a capacitor C889, a capacitor C888, a resistor 1398, a resistor 1399 and a chip U198.

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