CN110347078B - Mars detector autonomous wake-up control system and method - Google Patents

Abstract

The invention relates to an autonomous wake-up control system and method for a Mars probe. After the fire breaks out, the solar battery array supplies the output power to the heating belt of the battery pack through the dormant power supply branch; as the output power of the solar array gradually increases, the bus voltage increases, and when the wake-up threshold is reached, the power module switch wakes up the circuit to work, and the output power Switch the wake-up signal to the temperature relay; the temperature relay is in the off state; as the output power of the solar cell array increases, the temperature of the battery pack gradually increases, and when the working temperature of the battery pack is reached, the temperature relay is automatically turned on, and the power switch wake-up signal drives the power supply The module switch action, connect the power module to the bus, and cut off the heating belt at the same time; the power module works to generate the working power, and the working power goes through the discharge and bus switch wake-up circuit to generate the discharge switch wake-up signal and the bus switch wake-up signal, which drive the discharge respectively. The switch and bus transfer switch are automatically closed to complete autonomous wake-up.

Description

A Mars probe autonomous wake-up control system and method

technical field

The invention relates to the field of aerospace deep space exploration, in particular to an autonomous wake-up control system for a Mars probe.

Background technique

Deep space exploration is an exploration into the wider solar system and cosmic space on the basis of major achievements in the field of satellites, manned spaceflight and space stations. Mars is one of the planets closest to the earth in the solar system. It belongs to the same terrestrial planet as the earth. It has important scientific significance for exploring the origin of the universe and life and studying the evolution process of the earth.

The thin, dry atmosphere and winds on Mars can lift dust off the surface of Mars, creating dust storms. Considering the strong dust storm, the output power of the solar array is seriously reduced during the fire day. In order to avoid the over-discharge of the battery and reduce the service life of the battery, over-discharge protection of the battery is required, so it is necessary to design a sleep wake-up function. When the capacity of the battery pack is insufficient and the output power of the solar cell array cannot meet the load demand, first cut off part of the load through the power distribution switch, so that the whole device enters the minimum working mode. When the output power of the solar cell array is still insufficient, the detector will be set to sleep. , disconnect all loads, and automatically wake up the detector to work through the autonomous wake-up circuit when the light conditions improve.

At present, my country is carrying out the Mars exploration mission for the first time. The Martian environment is complex. If the temperature is low when it wakes up, it will affect the discharge function of the battery pack, or even fail to discharge. Therefore, the autonomous wake-up technology in the complex environment of Mars is an urgent problem to be solved.

SUMMARY OF THE INVENTION

The technical solutions of the present invention are as follows: the present invention provides an autonomous wake-up control system for a Mars probe. Due to the complex environment of Mars, in order to prevent the battery pack from being over-discharged, the probe enters the sleep mode, and when the light conditions improve, it will wake up the probe to work autonomously. The method is implemented by a very simple analog circuit without software, the control method is simple, the reliability is high, and the engineering implementation is easy.

The technical solution of the present invention is: an autonomous wake-up control system for a Mars probe. The control system includes a solar cell array, an MPPT circuit, a dormant power supply branch, a battery pack, a power module, a heating belt, a temperature relay, and a power module switch to wake up. Circuit, discharge and busbar switch wake-up circuit, power module switch Kd, busbar switch K4, discharge switch K2; heating tape and temperature relay are attached to the battery pack monomer;

One end of the solar array is grounded, the other end is connected to the MPPT circuit and the dormant power supply branch, and the other end of the MPPT circuit is connected to the busbar; one end of the battery pack is grounded, and the other end is connected to the busbar through the discharge switch K2; the busbar switch K4 is a single-ended double-throw switch , its fixed end is connected to the bus, and the moving end can be connected to the dormant power supply circuit or the output end of the bus; the power module switch Kd is also a single-ended double-throw switch, its fixed end is connected to the bus, and the moving end can be connected to the bus. The heating belt can be connected to the power module. The power module is connected to the wake-up circuit of the discharge switch and the bus switch. The bus switch wake-up circuit is used to generate the wake-up signal of the discharge switch and the wake-up signal of the bus switch. The wake-up signal of the discharge switch is connected to the wake-up of the discharge switch K2. Line package, the wake-up line package connected to the discharge switch K2 is connected to the bus through the three-terminal voltage regulator; the bus switch wake-up signal is connected to the wake-up line package of the bus switch K4, and the wake-up line package of the bus switch K4 is connected to the bus through the three-terminal voltage stabilizer Connect to the busbar; one end of the power module switch wake-up circuit is connected to the busbar, and the other end is connected to the temperature relay, which is used to generate the output power module switch wake-up signal to the temperature relay, and the other end of the temperature relay is connected to the power module switch kd wake-up line package, the power module The wake-up line package of switch kd is connected to the bus through a three-terminal voltage regulator.

The power module switch wake-up circuit includes a first wake-up allow switch K1-1, a second wake-up allow switch K1-2, a third wake-up allow switch K1-3, a fourth wake-up allow switch K1-4, voltage regulators W1, W2 , W3, W4, voltage regulator resistors R11, R12, R13, R14, current limiting resistors R21, R22, R23, R24, R25, R26, R27, R28, transistors M1, M2, M3, M4;

One end of the first wake-up permission switch K1-1 is connected to the bus bar through the first voltage regulator tube W1, and the other end is grounded through the voltage regulator resistor R11; the connection point of the first wake-up permission switch K1-1 and the voltage regulator resistor R11 is marked as the first node;

The second wake-up permission switch K1-2, one end is connected to the bus through the second voltage regulator tube W2, and the other end is grounded through the voltage regulator resistor R12; the connection point between the first wake-up permission switch K1-2 and the voltage regulator resistor R12 is marked as the second node ;

One end of the third wake-up permission switch K1-3 is connected to the bus through the third voltage regulator tube W3, and the other end is grounded through the voltage regulator resistor R13; the connection point of the first wake-up permission switch K1-3 and the voltage regulator resistor R13 is marked as the third node;

The third wake-up enable switch K1-4, one end is connected to the bus bar through the fourth voltage regulator W4, and the other end is grounded through the voltage regulator resistor R14; the connection point between the first wake-up permission switch K1-4 and the voltage regulator resistor R14 is marked as the fourth node ;

The bases of the triodes M1 and M3 are grounded through the current limiting resistor R22 and the current limiting resistor R25 respectively; at the same time, the base of the triode M1 is also connected to the first node through the current limiting resistor R21; the base of the triode M3 is also connected through the current limiting resistor R26 The second node; the first node is connected to the second node; the collectors of the transistors M1 and M3 are connected to one end of the temperature relay; the emitter of the transistor M1 is connected to the collector of the transistor M2; the emitter of the transistor M3 is connected to the collector of the transistor M4 ;

The bases of the triodes M2 and M4 are grounded through the current limiting resistor R24 and the current limiting resistor R28 respectively; at the same time, the base of the triode M2 is also connected to the third node through the current limiting resistor R23; the base of the triode M4 is also connected through the current limiting resistor R27 The fourth node; the third node is connected to the fourth node; the emitters of the transistors M2 and M4 are grounded in common.

The Mars probe autonomous wake-up control system further includes diodes D1-1, D1-2, D1-3, D1-4, the positive end of the diode D1-1 is connected to the first node, and the negative end is connected to the resistor R21; the diode D1-2 The positive end of the diode D1-3 is connected to the second node, and the negative end is connected to the resistor R26; the positive end of the diode D1-3 is connected to the third node, and the negative end is connected to the resistor R23; the positive end of the diode D1-4 is connected to the fourth node, and the negative end is connected to the resistor R27.

The discharge and bus switch wake-up circuit includes a first pulse trigger, a diode D2-1, a diode D2-2, a fifth wake-up enable switch K1-5, a sixth wake-up enable switch K1-6, a first drive circuit, a resistor R31, R32, R33, R34;

The input end of the first pulse trigger is connected to the output end of the power supply module, and the output end of the first pulse trigger is divided into two channels, one of which is connected to one end of the fifth wake-up enable switch K1-5 through the diode D2-1, and the fifth wake-up enable switch The other end of K1-5 is connected in parallel with resistors R31 and R32, and the resistors R31 and R32 are connected to the first drive circuit; the other end is connected to one end of the sixth wake-up enable switch K1-6 through diode D2-2, and the sixth wake-up enable switch K1-6 The other end of the resistor R33 and R34 are connected in parallel to the first drive circuit; the first pulse trigger works to generate a pulse signal, and through the first drive circuit, two low-level signals are output, which are respectively used as the discharge switch wake-up signal and the bus switch. wake-up signal.

The discharge and bus switch wake-up circuit also includes a second pulse trigger, diodes D2-3 and D2-4. The second pulse trigger and the first pulse trigger form a redundant backup, and the input end of the second pulse trigger is connected to the first pulse trigger. The first pulse trigger is connected in parallel to the output end of the power module, and the output end is divided into two channels, one is connected in parallel with the diode D2-3 and the diode D2-1, and the fifth wake-up enable switch K1-5; the other is connected through the diode D2-4 and the diode D2-1 D2-2 is connected in parallel with the sixth wake-up enable switch K1-6.

The Mars probe autonomous wake-up control system further includes a second drive circuit, the second drive circuit and the first drive circuit form a redundant backup, the other end of the fifth wake-up permitting switch K1-5 is connected in parallel with resistors R35 and R36 at the same time, and the resistors R35 and R36 are connected in parallel. R35 and R36 are connected to the second drive circuit; the other end of the sixth wake-up permit switch K1-6 is connected to the resistors R37 and R38 in parallel at the same time, and the resistors R37 and R38 are connected to the second drive circuit; the second drive circuit outputs two low-level signals, The two channels of low-level signals are respectively connected in parallel with the two channels of low-level signals output by the first drive circuit to obtain a wake-up signal of the discharge switch and a wake-up signal of the bus switch.

The power module switch wake-up line package Kd is connected to the bus bar through a three-terminal voltage stabilizer.

The wake-up line package of the discharge switch K2 is connected to the bus bar through a three-terminal voltage regulator.

The wake-up line package of the bus switch K4 is connected to the bus through a three-terminal voltage regulator.

The temperature relay is a contact inductive temperature relay in a two-series-two-parallel mode.

Another technical solution of the present invention is: an autonomous wake-up control method for a Mars rover, the method comprising the following steps:

Step 1. After the fire breaks out, the solar cell array provides the output power to the battery pack heating belt through the dormant power supply branch;

Step 2: As the output power of the solar array gradually increases, the bus voltage increases, and after reaching the wake-up threshold, the power module switch wake-up circuit works, and the power switch wake-up signal is output to the temperature relay; the temperature relay is in a disconnected state;

Step 3. As the output power of the solar array increases, the temperature of the battery pack gradually increases. After reaching the working temperature of the battery pack, the temperature relay is automatically turned on, the power switch wake-up signal drives the power module switch kd to act, and the power module is connected to the busbar , at the same time cut off the heating belt;

Step 4: The power module works to generate the working power. The working power passes through the discharge and bus switch wake-up circuit to generate the discharge switch wake-up signal and the bus switch wake-up signal. The discharge switch wake-up signal and the bus switch wake-up signal drive the discharge switch and the bus switch respectively. The switch is automatically closed to complete the autonomous wake-up, and the energy supply of the whole device is normal.

The beneficial effects of the present invention compared with the prior art are:

(1), the present invention adopts the dormant power supply branch circuit and the MPPT circuit, and solves the problem of the solar array power output path of the MPPT circuit when the power module is not powered;

(2) The present invention adopts the MPPT circuit to realize the maximum power point tracking function of the solar cell array. During the work on the surface of Mars, the output power of the solar array will be greatly affected due to the effects of the Martian environment such as temperature, light intensity, atmosphere, dust, etc. The MPPT circuit maximizes the output power of the solar array, reducing the area of the solar array and the storage battery. The depth of discharge reduces the weight of the power supply and prolongs the service life of the battery.

(3), the first pulse trigger and the second pulse trigger of the present invention are retriggerable monostable triggers, which are connected in parallel with high reliability, and the first driving circuit and the second driving circuit adopt double redundant decoding. The output drive circuit is connected in parallel with high reliability, which improves the reliability of the wake-up signal of the discharge switch and the wake-up signal of the bus switch.

(4) In the present invention, the wake-up signal of the bus switch, the wake-up signal of the discharge switch and the wake-up signal of the bus switch use a three-terminal voltage stabilizer to connect the wake-up line package to prevent the bus voltage from increasing at the moment of wake-up, resulting in the overvoltage phenomenon of the relay line package.

(5) The temperature relay of the present invention adopts a high-reliability two-series-two-parallel contact inductive temperature relay, which ensures the working temperature of the battery after the wake-up condition is satisfied.

Description of drawings

Fig. 1 is the circuit diagram of the Mars probe autonomous wake-up control system of the present invention after hibernation;

FIG. 2 is a circuit diagram of the Mars probe autonomous wake-up control system of the present invention after wake-up. .

Detailed ways

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

As shown in FIG. 1, the present invention provides a Mars probe autonomous wake-up control system, which includes a solar cell array 1, an MPPT circuit 2, a dormant power supply branch 3, a battery pack 4, a power module 5, a heating belt 6, Temperature relay 7, power module switch wake-up circuit 8, discharge and bus switch wake-up circuit 11, power module switch Kd, bus switch K4, discharge switch K2; heating belt 6 and temperature relay 7 are attached to the battery pack.

One end of the solar array 1 is grounded, the other end is connected to the MPPT circuit 2 and the dormant power supply branch 3, and the other end of the MPPT circuit 2 is connected to the bus; one end of the battery pack 4 is grounded, and the other end is connected to the bus through the discharge switch K212; the bus switch K413 is Single-ended double-throw switch, its fixed end is connected to the bus, and the moving end can be connected to the sleep power supply circuit 3, or can be connected to the bus output; the power module switch Kd14 is also a single-ended double-throw switch, and its fixed end is connected to the bus. , the moving end can be connected to the heating belt 6, or can be connected to the power module 5. The power module 5 is connected to the discharge and bus switch wake-up circuit 11, and the discharge and bus switch wake-up circuit 11 is used to generate the discharge switch wake-up signal and the bus switch. The wake-up signal, the wake-up signal of the discharge switch is connected to the wake-up line package of the discharge switch K212, and the wake-up line package of the discharge switch K212 is connected to the bus through the three-terminal voltage regulator; the wake-up signal of the bus switch is connected to the wake-up line package of the bus switch K413, and the bus is switched The wake-up line package of the switch K413 is connected to the bus bar through a three-terminal voltage regulator; the power module switch wake-up circuit 8 has one end connected to the bus bar and the other end connected to the temperature relay, which is used to generate the output power module switch wake-up signal to the temperature relay 7, and the temperature relay 7 The other end of the power supply module switch kd14 is connected to the wake-up line package of the power module switch kd14, and the wake-up line package of the power module switch kd14 is connected to the bus bar through a three-terminal voltage regulator.

The power module switch wake-up circuit 8 includes a first wake-up permit switch K1-1, a second wake-up permit switch K1-2, a third wake-up permit switch K1-3, a fourth wake-up permit switch K1-4, a voltage regulator tube W1, W2, W3, W4, voltage regulator resistors R11, R12, R13, R14, current limiting resistors R21, R22, R23, R24, R25, R26, R27, R28, transistors M1, M2, M3, M4;

One end of the first wake-up permission switch K1-1 is connected to the bus bar through the first voltage regulator tube W1, and the other end is grounded through the voltage regulator resistor R11; the connection point of the first wake-up permission switch K1-1 and the voltage regulator resistor R11 is marked as the first node;

The second wake-up permission switch K1-2, one end is connected to the bus through the second voltage regulator tube W2, and the other end is grounded through the voltage regulator resistor R12; the connection point between the first wake-up permission switch K1-2 and the voltage regulator resistor R12 is marked as the second node ;

One end of the third wake-up permission switch K1-3 is connected to the bus through the third voltage regulator tube W3, and the other end is grounded through the voltage regulator resistor R13; the connection point of the first wake-up permission switch K1-3 and the voltage regulator resistor R13 is marked as the third node;

The third wake-up enable switch K1-4, one end is connected to the bus bar through the fourth voltage regulator W4, and the other end is grounded through the voltage regulator resistor R14; the connection point between the first wake-up permission switch K1-4 and the voltage regulator resistor R14 is marked as the fourth node ;

The bases of the triodes M1 and M3 are grounded through the current limiting resistor R22 and the current limiting resistor R25 respectively; at the same time, the base of the triode M1 is also connected to the first node through the current limiting resistor R21; the base of the triode M3 is also connected through the current limiting resistor R26 The second node; the first node is connected to the second node; the collectors of the transistors M1 and M3 are connected to one end of the temperature relay 7 in common; the emitter of the transistor M1 is connected to the collector of the transistor M2; the emitter of the transistor M3 is connected to the collector of the transistor M4 electrode;

The bases of the triodes M2 and M4 are grounded through the current limiting resistor R24 and the current limiting resistor R28 respectively; at the same time, the base of the triode M2 is also connected to the third node through the current limiting resistor R23; the base of the triode M4 is also connected through the current limiting resistor R27 The fourth node; the third node is connected to the fourth node; the emitters of the transistors M2 and M4 are grounded in common.

As a further preferred solution, the power module switch wake-up circuit 8 further includes diodes D1-1, D1-2, D1-3, D1-4, the positive end of the diode D1-1 is connected to the first node, and the negative end is connected to the resistor R21 ; The positive end of the diode D1-2 is connected to the second node, and the negative end is connected to the resistor R26; the positive end of the diode D1-3 is connected to the third node, and the negative end is connected to the resistor R23; the positive end of the diode D1-4 is connected to the fourth node, and the negative end is connected to the fourth node. The terminal is connected to resistor R27.

The discharge and bus switch wake-up circuit 11 includes a first pulse trigger, a diode D2-1, a diode D2-2, a fifth wake-up enable switch K1-5, a sixth wake-up enable switch K1-6, a first drive circuit, Resistors R31, R32, R33, R34;

The input end of the first pulse trigger 9-1 is connected to the output end of the power supply module, and the output end of the first pulse trigger 9-1 is divided into two channels, one of which is connected to one end of the fifth wake-up enable switch K1-5 through the diode D2-1 , the other end of the fifth wake-up allowing switch K1-5 is connected in parallel with resistors R31 and R32, and the resistors R31 and R32 are connected to the first drive circuit 10; Sixth, the other end of the wake-up permit switch K1-6 is connected in parallel with the resistors R33 and R34 to the first drive circuit; the first pulse trigger 9-1 works to generate a pulse signal, and the first drive circuit 10 outputs two low-level signals, As the wake-up signal of the discharge switch and the wake-up signal of the bus switch, respectively.

As a further preferred solution, the discharge and busbar switch wake-up circuit 11 further includes a second pulse trigger, diodes D2-3 and D2-4, a second pulse trigger 9-2 and a first pulse trigger 9-1 To form a redundant backup, the input end of the second pulse trigger 9-2 is connected in parallel with the output end of the first pulse trigger 9-1 to the output end of the power supply module. The fifth wake-up permitting switch K1-5 is connected; the other way is connected to the sixth wake-up permitting switch K1-6 in parallel with the diode D2-2 through the diode D2-4.

As a further preferred solution, the discharge and bus switch wake-up circuit 11 further includes a second drive circuit, the second drive circuit and the first drive circuit form a redundant backup, and the fifth wake-up allows the other ends of the switches K1-5 to be connected in parallel at the same time Connect the resistors R35 and R36, and connect the resistors R35 and R36 to the second drive circuit; the sixth wake-up allows the other end of the switch K1-6 to connect the resistors R37 and R38 in parallel at the same time, and the resistors R37 and R38 connect the second drive circuit; the output of the second drive circuit Two low-level signals are respectively connected in parallel with the two low-level signals output by the first drive circuit to obtain a discharge switch wake-up signal and a bus switch switch wake-up signal.

The working principle of the above-mentioned Mars rover autonomous wake-up control system is as follows:

When the Mars rover sleeps, the power module switch Kd14 is connected to the heating belt 6, the discharge switch K212 is off, the first wake-up permission switch K1-1, the second wake-up permission switch K1-2, the third wake-up permission switch K1-3, The fourth wake-up permitting switch K1-4 is in an on state, the temperature relay 7 is in an off state, and the busbar switch K413 connects the dormant power supply branch 12 to the busbar output.

After the fire breaks out, the output power of the solar array 1 is supplied to the heating belt 6 of the battery pack through the dormant power supply branch 3, and the heating belt 6 is connected to the bus through the switch Kd 14 of the power module. As the output power of the solar array 1 gradually increases, the bus voltage increases. After reaching the wake-up threshold, the power module switch wake-up circuit 8 works, and the power module switch wake-up circuit 8 outputs a low-level signal of the power switch wake-up signal to the temperature relay 7; The output power increases, and the temperature of the battery pack increases gradually. After reaching the working temperature of the battery pack, the temperature relay 7 is automatically turned on. At this time, the low-level signal of the power switch wake-up signal drives the power module switch kd 14 to act, and the power module 5 is connected. At the same time, the heating belt 6 is cut off, the power module 5 works to generate the working power, and the pulse signal is generated by the first pulse trigger and the second pulse trigger, and the first pulse trigger and the second pulse trigger form a two-parallel circuit To increase its reliability, after the pulse signal output is isolated by the isolation diode, it is output to the first drive circuit and the second drive circuit after passing through the fifth wake-up allowing switch K1-5 and the sixth wake-up allowing switch K1-6, and the first drive circuit A dual parallel circuit is formed with the second drive circuit to increase its reliability. The first drive circuit and the second drive circuit work to output a discharge switch wake-up signal and a bus switch wake-up signal. The discharge switch wake-up signal and the bus switch wake-up signal are: The low-level signal drives the discharge switch 12 and the bus switch 13 simultaneously, the discharge switch 12 connects the battery pack 4 to the bus, the bus switch 13 cuts off the dormant power supply branch 3, and the bus voltage is connected to the bus output. The power of the solar cell array 1 is output from the MPPT circuit 2 to the busbar, and at the same time, the battery pack 4 is charged to complete the autonomous wake-up. The energy supply of the whole device is normal, and the inspection and detection tasks can be carried out.

In order to achieve better technical effect, the present invention also adopts the following technology:

(1) The temperature relay adopts a high-reliability two-series-two-parallel contact inductive temperature relay, which ensures the working temperature of the battery after the wake-up condition is met.

(2) The first pulse trigger and the second pulse trigger are retriggerable monostable triggers and are connected in parallel with high reliability, which improves the reliability of pulse generation.

(3) The first drive circuit and the second drive circuit use dual redundant decoding output drive circuits, and are connected in parallel with high reliability, which improves the reliability of the wake-up signal of the discharge switch and the wake-up signal of the bus switch.

(4) The wake-up signal of the power module switch, the wake-up signal of the discharge switch and the wake-up signal of the bus switch switch use a three-terminal voltage stabilizer to connect the wake-up line package to prevent the bus voltage from increasing at the moment of wake-up, resulting in overvoltage of the relay line package.

(5) The discharge switch adopts a magnetic latching relay with high reliability in parallel mode.

(6) The above-mentioned busbar switch adopts magnetic latching relay with high reliability in parallel mode.

(7) The power module switch adopts a high-reliability two-series-two-parallel magnetic latching relay.

(8) In order to meet the complex environment on the surface of Mars and maximize the use of the output power of the solar array, the MPPT circuit adopts the maximum power point tracking technology of the solar cell array.

Based on the above-mentioned Mars probe autonomous wake-up control system, the present invention provides a Mars probe autonomous wake-up control method, the method comprising the following steps:

Step 1. After the fire breaks out, the solar cell array provides the output power to the battery pack heating belt through the dormant power supply branch;

Step 2, as the output power of the solar array increases gradually, the bus voltage increases, and after reaching the wake-up threshold, the power module switch wake-up circuit 8 works, and the power switch wake-up signal is output to the temperature relay 7; the temperature relay 7 is in a disconnected state;

Step 3. As the output power of the solar cell array 1 increases, the temperature of the battery pack increases gradually. After reaching the working temperature of the battery pack, the temperature relay is automatically turned on, and the power switch wake-up signal drives the power module switch 14 to act, and the power module 5 is connected. into the bus, and at the same time cut off the heating belt 6;

Step 4: The power module 5 works to generate the working power. The working power is discharged and the bus switch wake-up circuit 11 generates the discharge switch wake-up signal and the bus switch wake-up signal. The discharge switch wake-up signal and the bus switch wake-up signal drive the discharge switch and the bus switch respectively. The busbar switch is automatically closed to complete the autonomous wake-up, and the energy supply of the whole device is normal.

The Mars probe autonomous wake-up control system adopted in the present invention realizes on-orbit autonomous control in the complex Mars environment, solves the influence of low battery temperature and cannot be effectively charged and discharged after the wake-up condition is satisfied, and solves the problem that the MPPT circuit is not powered when the power module is not powered The problem of the power output path of the solar array ensures that there will be no high-voltage shock when the relay operates at the time of wake-up, and improves the reliability and safety of the Mars probe's on-orbit operation. The structure is simple, the reliability is high, and the engineering implementation is easy. It has very important application value in the field of detection.

Although the content of the present invention has been described in detail through the above embodiments, it should be appreciated that the above description should not be construed as limiting the present invention. Various modifications and alternatives to the present invention will be apparent to those skilled in the art upon reading the foregoing. Accordingly, the scope of protection of the present invention should be defined by the appended claims.

Claims (11)

1. A Mars probe autonomous wake-up control system, characterized in that it comprises a solar cell array (1), an MPPT circuit (2), a dormant power supply branch (3), a battery pack (4), a power module (5), a heating Belt (6), temperature relay (7), power module switch wake-up circuit (8), discharge and bus switch wake-up circuit (11), power module switch Kd, bus switch K4, discharge switch K2; heating belt (6) and the temperature relay (7) attached to the battery pack unit; One end of the solar cell array (1) is grounded, the other end is connected to the MPPT circuit (2) and the dormant power supply branch (3), and the other end of the MPPT circuit (2) is connected to the bus bar; one end of the battery pack (4) is grounded, and the other end is connected to the discharge switch K2(12) is connected to the busbar; the busbar switch K4(13) is a single-ended double-throw switch, its non-moving end is connected to the busbar, and the moving end can be connected to the sleep power supply circuit (3), or can be connected to the busbar output end; power supply The module switch Kd (14) is also a single-ended double-throw switch, its non-moving end is connected to the busbar, and the moving end can be connected to the heating belt (6), or can be connected to the power module (5), which is connected to the discharge With the bus switch wake-up circuit (11), the bus switch wake-up circuit (11) is used to generate the discharge switch wake-up signal and the bus switch wake-up signal, and the discharge switch wake-up signal is connected to the wake-up line package of the discharge switch K2 (12), which is connected to the discharge switch The wake-up line package of the switch K2 (12) is connected to the bus through the three-terminal voltage regulator; the wake-up signal of the bus switch is connected to the wake-up line package of the bus switch K4 (13), and the wake-up line package of the bus switch K4 (13) is connected through the three-terminal voltage regulator. The terminal voltage regulator is connected to the bus bar; the power module switch wake-up circuit (8) is connected to the bus bar at one end and the temperature relay at the other end, and is used to generate an output power module switch wake-up signal to the temperature relay (7), and the other end of the temperature relay (7) One end is connected to the wake-up line package of the power module switch kd (14), and the wake-up line package of the power module switch kd (14) is connected to the bus through a three-terminal voltage stabilizer; After the fire breaks out, the output power of the solar battery array is supplied to the heating belt of the battery pack through the dormant power supply branch; as the output power of the solar array gradually increases, the bus voltage rises, and when the wake-up threshold is reached, the power module switch wake-up circuit (8) works , output the power switch wake-up signal to the temperature relay (7); the temperature relay (7) is in the disconnected state; As the output power of the solar cell array (1) increases, the temperature of the battery pack increases gradually. After reaching the working temperature of the battery pack, the temperature relay is automatically turned on, and the power switch wake-up signal drives the power module switch Kd to act, and the power module (5) Connect the busbar, and cut off the heating belt (6) at the same time; The power supply module (5) works to generate a working power supply, and the working power supply is discharged and the bus switch wake-up circuit (11) generates a discharge switch wake-up signal and a bus switch wake-up signal, and the discharge switch wake-up signal and the bus switch wake-up signal drive the discharge switch respectively. The switch and busbar switch are automatically closed to complete the autonomous wake-up, and the energy supply of the whole device is normal. 2. A Mars probe autonomous wake-up control system according to claim 1, characterized in that the power module switch wake-up circuit (8) comprises a first wake-up permission switch K1-1, a second wake-up permission switch K1-2 , the third wake-up enable switch K1-3, the fourth wake-up enable switch K1-4, voltage regulator tubes W1, W2, W3, W4, voltage regulator resistors R11, R12, R13, R14, current limiting resistors R21, R22, R23, R24, R25, R26, R27, R28, triode M1, M2, M3, M4; One end of the first wake-up permission switch K1-1 is connected to the bus bar through the first voltage regulator tube W1, and the other end is grounded through the voltage regulator resistor R11; the connection point of the first wake-up permission switch K1-1 and the voltage regulator resistor R11 is marked as the first node; The second wake-up permission switch K1-2, one end is connected to the bus through the second voltage regulator tube W2, and the other end is grounded through the voltage regulator resistor R12; the connection point between the first wake-up permission switch K1-2 and the voltage regulator resistor R12 is marked as the second node ; One end of the third wake-up permission switch K1-3 is connected to the bus through the third voltage regulator tube W3, and the other end is grounded through the voltage regulator resistor R13; the connection point of the first wake-up permission switch K1-3 and the voltage regulator resistor R13 is marked as the third node; The third wake-up enable switch K1-4, one end is connected to the bus bar through the fourth voltage regulator W4, and the other end is grounded through the voltage regulator resistor R14; the connection point between the first wake-up permission switch K1-4 and the voltage regulator resistor R14 is marked as the fourth node ; The bases of the triodes M1 and M3 are grounded through the current limiting resistor R22 and the current limiting resistor R25 respectively; at the same time, the base of the triode M1 is also connected to the first node through the current limiting resistor R21; the base of the triode M3 is also connected through the current limiting resistor R26 The second node; the first node is connected to the second node; the collectors of the transistors M1 and M3 are commonly connected to one end of the temperature relay (7); the emitter of the transistor M1 is connected to the collector of the transistor M2; the emitter of the transistor M3 is connected to the transistor M4 the collector; The bases of the triodes M2 and M4 are grounded through the current limiting resistor R24 and the current limiting resistor R28 respectively; at the same time, the base of the triode M2 is also connected to the third node through the current limiting resistor R23; the base of the triode M4 is also connected through the current limiting resistor R27 The fourth node; the third node is connected to the fourth node; the emitters of the transistors M2 and M4 are grounded in common. 3. A Mars probe autonomous wake-up control system according to claim 2, characterized in that it further comprises diodes D1-1, D1-2, D1-3, D1-4, and the positive end of the diode D1-1 is connected to the first A node, the negative end is connected to the resistor R21; the positive end of the diode D1-2 is connected to the second node, and the negative end is connected to the resistor R26; the positive end of the diode D1-3 is connected to the third node, and the negative end is connected to the resistor R23; The positive terminal is connected to the fourth node, and the negative terminal is connected to the resistor R27. 4. A Mars probe autonomous wake-up control system according to claim 1, characterized in that the discharge and bus switch wake-up circuit comprises a first pulse trigger, a diode D2-1, a diode D2-2, a fifth Wake-up enable switch K1-5, sixth wake-up enable switch K1-6, first drive circuit, resistors R31, R32, R33, R34; The input end of the first pulse trigger (9-1) is connected to the output end of the power supply module, and the output end of the first pulse trigger (9-1) is divided into two channels, one of which is connected to the fifth wake-up enable switch K1 through the diode D2-1 One end of -5, the other end of the fifth wake-up permission switch K1-5 is connected in parallel with resistors R31 and R32, and the resistors R31 and R32 are connected to the first drive circuit (10-1); the other way is connected to the sixth wake-up permission through diode D2-2 One end of the switch K1-6, the sixth wake-up allows the other end of the switch K1-6 to connect the resistors R33 and R34 in parallel to the first drive circuit (10-1); the first pulse trigger (9-1) works to generate a pulse signal , through the first drive circuit (10-1), outputs two low-level signals, which are respectively used as the wake-up signal of the discharge switch and the wake-up signal of the bus switch. 5. A Mars probe autonomous wake-up control system according to claim 1, characterized in that the discharge and bus switch wake-up circuit (11) further comprises a second pulse trigger (9-2), a diode D2- 3. D2-4, the second pulse trigger (9-2) and the first pulse trigger (9-1) form a redundant backup, the input end of the second pulse trigger (9-2) and the first pulse trigger (9-1) Connect the output terminal of the power module in parallel, the output terminal is divided into two channels, one is connected in parallel with the diode D2-3 and the diode D2-1 to the fifth wake-up enable switch K1-5; the other is connected through the diode D2-4 and the diode D2-1 D2-2 is connected in parallel with the sixth wake-up enable switch K1-6. 6. A Mars probe autonomous wake-up control system according to claim 1, characterized in that it further comprises a second drive circuit (10-2), and the second drive circuit (10-2) and the first drive circuit constitute redundant For backup, the fifth wake-up allows the other ends of the switches K1-5 to be connected in parallel with resistors R35 and R36 at the same time, and the resistors R35 and R36 are connected to the second drive circuit (10-2); the sixth wake-up allows the other ends of the switches K1-6 to be connected in parallel at the same time The resistors R37 and R38 are connected, and the resistors R37 and R38 are connected to the second driving circuit (10-2); the second driving circuit (10-2) outputs two low-level signals, and the two low-level signals are respectively connected with the first driving circuit The circuit (10-1) outputs two low-level signals in parallel to obtain the wake-up signal of the discharge switch and the wake-up signal of the bus switch. 7 . The Mars probe autonomous wake-up control system according to claim 1 , wherein the power module switch wake-up line package Kd is connected to the bus through a three-terminal voltage stabilizer. 8 . 8 . The Mars probe autonomous wake-up control system according to claim 1 , wherein the wake-up line package of the discharge switch K2 is connected to the bus bar through a three-terminal voltage stabilizer. 9 . 9 . The Mars probe autonomous wake-up control system according to claim 1 , wherein the wake-up line package of the bus switch K4 is connected to the bus through a three-terminal voltage stabilizer. 10 . 10 . The Mars probe autonomous wake-up control system according to claim 1 , wherein the temperature relay ( 7 ) selects a two-series-two-parallel contact inductive temperature relay. 11 . 11. A Mars rover autonomous wake-up control method based on the system of claim 1, the method comprising the steps of: Step 1. After the fire breaks out, the solar cell array provides the output power to the battery pack heating belt through the dormant power supply branch; Step 2: As the output power of the solar array increases gradually, the bus voltage increases, and after reaching the wake-up threshold, the power module switch wake-up circuit (8) works, and outputs the power switch wake-up signal to the temperature relay (7); the temperature relay (7) is disconnected; Step 3: As the output power of the solar cell array (1) increases, the temperature of the battery pack gradually increases. After reaching the working temperature of the battery pack, the temperature relay is automatically turned on, and the power switch wake-up signal drives the power module switch kd (14) to act, Connect the power module (5) to the busbar, and cut off the heating belt (6) at the same time; Step 4: The power supply module (5) works to generate the working power. The working power is discharged and the bus switch wake-up circuit (11) generates the discharge switch wake-up signal and the bus switch wake-up signal. The discharge switch wake-up signal and the bus switch wake-up signal are respectively The drive discharge switch and the bus switch are automatically closed to complete the autonomous wake-up, and the energy supply of the whole device is normal.

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