CN-121995678-A - Electrochromic film control and state acquisition circuit and method for spacecraft

CN121995678ACN 121995678 ACN121995678 ACN 121995678ACN-121995678-A

Abstract

The invention provides an electrochromic film control and state acquisition circuit and method for a spacecraft, comprising a bus protection circuit, a voltage control circuit and a state acquisition circuit, wherein the bus power supply protection circuit is connected with the voltage control circuit, and the state acquisition circuit is connected with the voltage control circuit and acquires a voltage output state. The bus protection circuit is formed by connecting a relay K1 and an asymmetric fuse, the voltage control circuit is connected with the regulating end of the three-terminal voltage-stabilizing tube U1 through a relay K2, the relay K3 is connected with the output stage of the three-terminal voltage-stabilizing tube U1 and the relay K2, the actuation and disconnection of the relay are controlled through external OC instructions to output four voltages, and the state acquisition circuit realizes the monitoring of the positive output voltage and the negative output voltage through the serial voltage division of resistors R5 and R6. The three-terminal voltage regulator is controlled by the switching relay switch to output various voltages, so that the problem of various voltage requirements of electrochromic films is solved.

Inventors

WANG TENG
YAN XIAOMING
ZHANG WEI
WU MEIWEN
JIANG TINGTING

Assignees

上海卫星工程研究所

Dates

Publication Date: 20260508
Application Date: 20260211

Claims (10)

1. The electrochromic film control and state acquisition circuit for the spacecraft is characterized by comprising a bus protection circuit, a voltage control circuit and a state acquisition circuit; The bus power supply protection circuit is connected with the voltage control circuit; the state acquisition circuit is connected with the voltage control circuit and is used for acquiring a voltage output state; The bus protection circuit is characterized in that a first relay is connected with an asymmetric fuse and used for protecting an input bus, a second relay is connected with an adjusting end of a three-terminal voltage-stabilizing tube in the voltage control circuit and connected with an output end of the three-terminal voltage-stabilizing tube and the second relay, and a first sampling resistor and a second sampling resistor are connected in series and divided in the state acquisition circuit to realize monitoring of positive and negative output voltages.
2. The electrochromic film control and status acquisition circuit for a spacecraft of claim 1, wherein the bus protection circuit comprises a first relay, a first fuse, a second fuse, a first current limiting resistor, and a first filter capacitor and a second filter capacitor; the first relay is connected with positive input of a power supply; The first fuse is connected with the first current limiting resistor in series and then connected with the second fuse in parallel, one end of the first fuse and one end of the second fuse are connected with the first relay in series after the first fuse and the second fuse are connected in parallel, and the other end of the first fuse and the other end of the second fuse are connected with the input end of the three-terminal voltage stabilizing tube in series; One end of the first filter capacitor and the second filter capacitor which are connected in series is connected with the input end of the three-terminal voltage stabilizing tube in series, the other end is connected with the negative end of the power supply.
3. The electrochromic film control and status acquisition circuit for a spacecraft of claim 1, wherein the voltage control circuit comprises a three-terminal voltage regulator, a first diode, a second relay, a third relay, a first resistor, a second resistor, a third filter capacitor, a fourth filter capacitor, a fifth filter capacitor, a sixth filter capacitor and a seventh filter capacitor; the three-terminal voltage stabilizing tube is provided with an input end, a voltage regulating end and an output end; the first diode is connected with the input end and the output end of the three-terminal voltage stabilizing tube in parallel; One end of the first resistor is connected with the output end of the three-terminal voltage-stabilizing tube, and the other end of the first resistor is connected with the adjusting end of the three-terminal voltage-stabilizing tube; One end of the second relay is connected with the second resistor and the third resistor, and the other end of the second relay is connected with the negative end of the power supply; The two ends of the second diode are respectively connected with the output end and the regulating end of the three-terminal voltage stabilizing tube after being connected in series with the third filter capacitor, and the other end of the third filter capacitor is connected with the negative end of the power supply; One end of the fourth filter capacitor and one end of the fifth filter capacitor are connected in series and then are connected with the output end of the three-terminal voltage stabilizing tube, the other end is connected with the negative end of the power supply; One end of the sixth filter capacitor and one end of the seventh filter capacitor are connected in series and then are connected with the output end of the three-terminal voltage stabilizing tube, the other end is connected with the negative end of the power supply; and four input nodes of the third relay are respectively connected with the output end of the three-terminal voltage stabilizing tube and the negative end of the power supply.
4. The electrochromic film control and status acquisition circuit for spacecraft of claim 1, wherein the first relay, the second relay and the third relay are all internally provided with change-over switches comprising change-over contacts, normally closed contacts and normally open contacts, the change-over contacts are connected with the normally closed contacts in a default condition, and the change-over contacts are connected with the normally open contacts in an external excitation condition.
5. The electrochromic film control and state acquisition circuit for the spacecraft according to claim 3, wherein the three-terminal voltage stabilizing tube adjusts the output voltage of the output end through the resistance ratio of the resistors connected in series by the adjusting end, the second relay switch realizes the short circuit of a third resistor, influences the series resistance of the voltage adjusting end of the three-terminal voltage stabilizing tube, adjusts the output potential of the three-terminal voltage stabilizing tube, realizes the adjustment of two output voltages, and the two pairs of contacts of the third relay are connected with the output end and a return line of the three-terminal voltage stabilizing tube, so that the direction switching of the output voltage is realized during switching, and the output of the total four voltage is realized.
6. The electrochromic film control and status acquisition circuit for spacecraft according to claim 3, wherein the voltage control circuit controls gear switching of the first relay, the second relay and the third relay through external instructions to complete startup, shutdown, positive first voltage output, positive second voltage output, negative first voltage output and negative second voltage output control of the electrochromic film.
7. The electrochromic film control and status collection circuit for a spacecraft of claim 1, wherein the status collection circuit comprises a first sampling resistor R5 and a second sampling resistor R6, and two ends of the first sampling resistor and the second sampling resistor are respectively connected with the positive output end and the negative output end of the third relay after being connected in series.
8. The electrochromic film control and status acquisition circuit for spacecraft according to claim 7, wherein the telemetry value is R6/(r5+r6) times of the output voltage value in forward output and R5/(r5+r6) times of the output voltage value in reverse output.
9. The electrochromic film control and status acquisition circuit for the spacecraft according to claim 3, wherein the first diode is used for preventing reverse breakdown of the three-terminal voltage regulator, the second diode is an output anti-locking diode, a freewheel path is provided for protecting the three-terminal voltage regulator, the third filter capacitor is a voltage regulator ripple rectifying filter capacitor, and the fourth filter capacitor, the fifth filter capacitor, the sixth filter capacitor and the seventh filter capacitor are used for adjusting voltage ripple output by the three-terminal voltage regulator.
10. An electrochromic film control and state acquisition method for a spacecraft, which is applied to the electrochromic film control and state acquisition circuit for a spacecraft as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps: Step1, controlling a switch of a first relay through an external instruction to realize on-off of a voltage control circuit; step 2, controlling the switch of the second relay through an external instruction to realize the selection of the adjusting resistor, and controlling the switch of the third relay through the external instruction to realize the output reversing; Step 3, under the condition that the second relay is closed, the switching contact is lapped to the normally closed contact, the second resistor is short-circuited, the resistors connected with the regulating end of the three-terminal voltage stabilizing tube are a first resistor and a third resistor, and the first voltage output is realized; when the command controls the switching state of the second relay, the switching contact is lapped to the normally open contact, and the resistance connected with the regulating end of the three-terminal voltage stabilizing tube is a first resistance, a second resistance and a third resistance, so that the second voltage output is realized; when the third relay is controlled to switch states, the switching contact is lapped to the normally open contact, the negative end of the circuit output is connected with the negative end of the power supply, the other switching contact is lapped to the normally closed contact, and the positive end of the circuit output is connected with the negative end of the power supply; And 4, collecting working states of the electrochromic film drive control circuit, namely adopting partial pressure detection of a first sampling resistor R5 and a second sampling resistor R6, respectively calculating partial pressure values of voltage detection points for four-gear output, wherein the telemetering value is R6/(R5+R6) times of the output voltage value in forward output, and is R5/(R5+R6) times of the output voltage value in reverse output.

Description

Electrochromic film control and state acquisition circuit and method for spacecraft Technical Field The invention relates to the field of electrochromic film voltage regulation, in particular to an electrochromic film control and state acquisition circuit and method for a spacecraft. Background Electrochromic films are important application materials for heat control requirements of spacecrafts, and the heat radiation capability under different conditions is realized by adjusting the colors of the films, so that the temperature of the spacecrafts is intelligently adjusted. At present, the electrochromic film is controlled by using a power supply voltage, the voltage is difficult to change, and the controller cannot adjust the voltage according to the color changing requirement. With the high-speed development of the aerospace field, the demand for using electrochromic films as thermal control materials is increasing, the traditional films which change color by means of single power supply voltage cannot meet the thermal control demand, if a variable power supply is used, the variable power supply needs to be heavier, and the use requirements cannot be met for the light weight required by a spacecraft. Patent document CN204068690U discloses a power supply circuit capable of outputting various voltages, and three-terminal voltage stabilizing tubes are adopted to output three different voltages of 5V, 6V and 9V in parallel, so that partial use scenes can be effectively met. However, the disadvantage of this patent document is that the forward and reverse voltage output cannot be realized, the output voltage is fixed, the switching cannot be realized, the regulation cannot be realized, and the redundancy of the resources of the three-terminal voltage regulator is used. Patent document CN203660878U discloses a three-terminal voltage regulator circuit with zero volt regulation, which adopts two three-terminal voltage regulator tubes to realize zero volt regulation of output, and realizes output voltage regulation by adjusting a sliding rheostat, so that a small voltage output scene can be satisfied. However, the disadvantage of this patent document is that the reverse output cannot be achieved, the output voltage cannot be switched by command, and there is an error by manually adjusting the varistor. Patent document CN20770604U discloses a power supply controller for a portable electrochromic device, which adjusts output voltage, the patent includes a power supply module, a voltage regulating module, and a control module, wherein the voltage regulating module uses a framework of a reference voltage source and a power regulating tube, can realize 1.28 v-5 v adjustable voltage output, and can switch output directions. The disadvantage of this patent document is that the controller is too bulky and requires accurate voltage input. Patent document CN220626932U discloses an input voltage adjusting circuit for an electrochromic device, which adjusts the input voltage of the electrochromic device, and realizes the rise and fall of the input voltage through a toggle switch, a linear voltage stabilizing chip and a sliding rheostat, so as to output voltage within the range of ±2.5v. The disadvantage of this patent is that remote command control of the output voltage is not possible and that there is an error condition in which the voltage needs to be adjusted by adjusting the slide rheostat. Patent document CN212905962U discloses a voltage regulating circuit for electrochromic glasses, which uses a control chip, a voltage stabilizing source, a gear potentiometer, a key, a current limiting chip and a voltage stabilizer to realize manual key switching of output voltage gears. The output voltage is regulated through the active key, the current state is indicated by adopting the indicator lamp, and the voltage regulating circuit realizes different access of the potentiometer through the grounding of the pin of the key control chip so as to realize different voltage output. The defects of the patent are that negative voltage cannot be output, the application range is limited, and the circuit content is too complicated to be suitable for the electrochromic film of the spacecraft. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide an electrochromic film control and state acquisition circuit and method for a spacecraft. The electrochromic film control and state acquisition circuit for the spacecraft comprises a bus protection circuit, a voltage control circuit and a state acquisition circuit, wherein the bus protection circuit is connected with the voltage control circuit; The bus power supply protection circuit is connected with the voltage control circuit; the state acquisition circuit is connected with the voltage control circuit and is used for acquiring a voltage output state; The bus protection circuit is characterized in that a first relay is connected with an asymmetric fuse and u