CN117382917B - Unfolding mechanism unlocking control circuit and spacecraft - Google Patents

Unfolding mechanism unlocking control circuit and spacecraft Download PDF

Info

Publication number
CN117382917B
CN117382917B CN202311517939.0A CN202311517939A CN117382917B CN 117382917 B CN117382917 B CN 117382917B CN 202311517939 A CN202311517939 A CN 202311517939A CN 117382917 B CN117382917 B CN 117382917B
Authority
CN
China
Prior art keywords
switch
resistor
control
module
detonation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202311517939.0A
Other languages
Chinese (zh)
Other versions
CN117382917A (en
Inventor
吴敬友
倪家伟
谢霞明
周明中
王亦楠
陈周瑜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Fuchang Space Technology Co ltd
Original Assignee
Suzhou Fuchang Space Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Fuchang Space Technology Co ltd filed Critical Suzhou Fuchang Space Technology Co ltd
Priority to CN202311517939.0A priority Critical patent/CN117382917B/en
Publication of CN117382917A publication Critical patent/CN117382917A/en
Application granted granted Critical
Publication of CN117382917B publication Critical patent/CN117382917B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G1/00—Cosmonautic vehicles
    • B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
    • B64G1/222—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles for deploying structures between a stowed and deployed state

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Air Bags (AREA)

Abstract

The invention discloses an unlocking control circuit of a unfolding mechanism and a spacecraft. The input end of a resistance switching module in the circuit is connected with the positive electrode power supply end, the output end of the resistance switching module is connected with the input end of the detonation switch module, the output end of the detonation switch module is connected with the first end of the bridge wire through a product plug, the second end of the bridge wire is connected with the negative electrode power supply end, the control module is used for controlling the first current limiting unit to be connected between the input end and the output end of the resistance switching module when an unlocking signal is received and the resistance of the bridge wire corresponding to the mechanism to be unfolded is smaller than or equal to a resistance set value, and is also used for controlling the second current limiting unit to be connected between the input end and the output end of the resistance switching module when the resistance of the bridge wire corresponding to the mechanism to be unfolded is larger than the resistance set value, so that the bridge wires with different internal resistances arranged in the circuit are considered, and the compatibility and the reliability of the control circuit are improved.

Description

Unfolding mechanism unlocking control circuit and spacecraft
Technical Field
The invention relates to the technical field of unlocking control of a unfolding mechanism, in particular to an unlocking control circuit of the unfolding mechanism and a spacecraft.
Background
The unlocking control circuit of the unfolding mechanism for the satellite is an important component part of the mechanism such as a satellite unlocking solar sailboard, an antenna, a propulsion pipeline and the like. Whether the deployment mechanism can unlock normally relates to success or failure of satellite launching and whether the satellite can work normally.
The traditional unlocking control circuit has the problem of inconsistent circuit design, and different bridge wires corresponding to different mechanisms to be unfolded have different resistance values, so that the current in the circuit is different. The method comprises the following steps: when the unlocking bridge wire is a initiating explosive device, the internal resistance of the initiating explosive device is small, the current in the circuit is large, the internal resistances of other bridge wires such as a hot knife, a memory alloy, a pin puller and the like are large, and the current in the circuit is relatively small. Different bridge wires in the circuit have different internal resistances, and the current flowing in the circuit also has different magnitudes, so that the compatibility of the control circuit is poor.
Disclosure of Invention
The invention provides an unlocking control circuit of a unfolding mechanism and a spacecraft, which are used for considering bridge wires with different resistance values and improving the compatibility of the control circuit.
According to an aspect of the present invention, there is provided a deployment mechanism unlock control circuit including: the device comprises a control module, at least one bridge wire, a detonation switch module in one-to-one correspondence with the bridge wire, a product plug and a resistance switching module in one-to-one correspondence with the bridge wire, wherein the resistance switching module comprises a first current limiting unit and a second current limiting unit, the resistance value of the first current limiting unit is larger than that of the second current limiting unit, the product plug comprises a first plug group in one-to-one correspondence with the bridge wire, the first plug group comprises a first positive electrode end and a first negative electrode end, and the first positive electrode end and the first negative electrode end of the same first plug group are connected;
the input end of the resistance switching module is connected with the positive electrode power supply end, the output end of the resistance switching module is connected with the input end of the corresponding detonation switch module, and the control end of the resistance switching module is connected with the control module;
The control module is used for controlling the conduction of at least one detonation switch of the detonation switch module corresponding to the mechanism to be unfolded when receiving an unlocking signal of the mechanism to be unfolded;
The first negative end of the first plug group is connected with the first end of the corresponding bridge wire, and the second end of the bridge wire is connected with the negative electrode power supply end;
the bridge wire is arranged in a set distance of the mechanism to be unfolded;
The control module is used for controlling the first current limiting unit to be connected between the input end and the output end of the resistance switching module when the unlocking signal is received and the resistance of the bridge wire corresponding to the mechanism to be unfolded is smaller than or equal to a resistance set value, and controlling the second current limiting unit to be connected between the input end and the output end of the resistance switching module when the resistance of the bridge wire corresponding to the mechanism to be unfolded is larger than the resistance set value.
Optionally, the detonation switch module further comprises a first control switch, a third resistor, a fourth resistor and a fifth resistor;
The first end of the first control switch is connected with the negative electrode power supply end, the second end of the first control switch is connected with the first end of the third resistor, the control end of the first control switch is connected with the control module, and the second end of the third resistor is connected with the first end of the fourth resistor;
The first end of the detonation switch is connected with the output end of the corresponding resistance switching module, the second end of the detonation switch is connected with the first positive electrode end of the corresponding first plug group, and the control end of the detonation switch is connected with the second end of the fourth resistor;
the first end of the fifth resistor is connected with the second end of the third resistor, and the first end of the detonation switch is connected with the second end of the fifth resistor.
Optionally, the detonation switch module comprises at least two detonation switch groups, and the detonation switch groups comprise a first control switch, a third resistor, a fourth resistor, a fifth resistor and the detonation switch;
The first end of the first control switch is connected with the negative electrode power supply end, the second end of the first control switch is connected with the first end of the third resistor, and the control end of the first control switch is connected with the control module;
The second end of the third resistor is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the control end of the detonation switch;
the first end of the fifth resistor is connected with the second end of the third resistor, and the second end of the fifth resistor is connected with the first end of the detonation switch;
the first end of the detonation switch is connected with the output end of the corresponding resistance switching module, and the second end of the detonation switch is connected with the first positive electrode end of the corresponding first plug group;
the control module is used for conducting different numbers of detonating switches according to different unfolding modes of the mechanism to be unfolded.
Optionally, the unfolding mechanism unlocking control circuit further comprises a positive line switch module, wherein the positive line switch module comprises a sixth resistor, a seventh resistor, an eighth resistor, a second control switch and at least one positive line switch;
the first end of the positive line switch is connected with the positive electrode power supply end, and the second end of the positive line switch is connected with the input end of each resistance switching module;
The first end of the sixth resistor is connected with the positive power supply end, the second end of the sixth resistor is connected with the first end of the seventh resistor, the second end of the seventh resistor is connected with the first end of the second control switch, the first end of the eighth resistor is connected with the second end of the sixth resistor, and the control end of the positive switch is connected with the second end of the eighth resistor;
The second end of the second control switch is connected with the negative electrode power supply end, the control end of the second control switch is connected with the control module, and the control module is used for controlling the second control switch to be closed when receiving the unlocking signal so as to enable the positive line switch to be conducted.
Optionally, the unlocking control circuit of the unfolding mechanism further comprises a loop switch module, wherein the loop switch module comprises a ninth resistor, a tenth resistor, an eleventh resistor, a third control switch and at least one loop switch;
The first end of the third control switch is connected with the positive electrode power supply end, the second end of the third control switch is connected with the first end of the ninth resistor, the control end of the third control switch is connected with the control module, and the control module is used for controlling the third control switch to be closed when receiving the unlocking signal so as to conduct the loop switch;
The first end of the loop switch is connected with the negative electrode power supply end, and the second end of the loop switch is connected with the second end of each bridge wire;
the second end of the ninth resistor is connected with the first end of the tenth resistor, and the control end of the loop switch is connected with the second end of the tenth resistor;
The first end of the eleventh resistor is connected with the second end of the ninth resistor, and the second end of the eleventh resistor is connected with the negative electrode power supply end.
Optionally, the detonation switch, the positive line switch and the return line switch are all MOS transistors.
Optionally, the unlocking control circuit of the unfolding mechanism further comprises a flying plug, wherein the flying plug comprises a second plug group corresponding to the first plug group one by one, the second plug group comprises a second positive electrode end and a second negative electrode end, the second positive electrode end is connected with the first positive electrode end of the corresponding first plug group, and the second negative electrode end is connected with the second negative electrode end of the corresponding first plug group;
The flight plug is connected with the control module, and the control module is used for controlling the second positive electrode end and the second negative electrode end of the corresponding second plug group to be connected when the unlocking signal is received.
Optionally, the unlocking control circuit of the unfolding mechanism further comprises electrostatic protection modules corresponding to the bridge wires one by one, wherein the first ends of the electrostatic protection modules are connected with the corresponding first ends of the bridge wires, and the second ends of the electrostatic protection modules are connected with the negative electrode power supply ends.
Optionally, the unlocking control circuit of the unfolding mechanism further comprises a detection circuit corresponding to the first control switch one by one, and the detection circuit comprises a linkage switch synchronous with the state of the first control switch, a twelfth resistor and an impedance detection module;
The first end of the linkage switch is grounded, the second end of the linkage switch is connected with the state quantity detection end of the detection circuit, and the state quantity detection end is used for being connected with the first detection end of the impedance detection module;
The first end of the twelfth resistor is connected with the second end of the linkage switch, and the second end of the twelfth resistor is grounded;
the second detection end of the impedance detection module is grounded.
According to another aspect of the invention, a spacecraft is provided, comprising the deployment mechanism unlocking control circuit.
According to the technical scheme, when the control module receives the unlocking signal and determines that the internal resistance of the bridge wire corresponding to the mechanism to be unfolded is smaller, the control module controls the first current limiting unit with larger resistance to be connected into the circuit and controls the detonation switch to be closed, so that a current flowing path is formed among the first current limiting unit, the detonation switch module, the product plug and the bridge wire, and the bridge wire is accumulated to control the mechanism to be unfolded after current is accumulated. Or when the control module receives the unlocking signal and determines that the internal resistance of the bridge wire corresponding to the mechanism to be unfolded is larger, the second current limiting unit with smaller resistance is controlled to be connected into the circuit, the initiation switch is controlled to be closed, and then a current flowing path is formed among the second current limiting unit, the initiation switch module, the product plug and the bridge wire, and the bridge wire is controlled to be unfolded after current accumulation. The control module selects the corresponding first current limiting unit or second current limiting unit to be connected into the circuit according to the resistance value of the bridge wire corresponding to the mechanism to be unfolded, so that bridge wires with different resistance values arranged in the circuit are met, and the compatibility of the circuit is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of an unlocking control circuit for a deployment mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of another deployment mechanism unlocking control circuit provided by an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of another deployment mechanism unlocking control circuit provided by an embodiment of the present invention;
fig. 4 is a circuit schematic diagram of a detection circuit in an unlocking control circuit of a deployment mechanism according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic circuit diagram of an unlocking control circuit for a deployment mechanism according to an embodiment of the present invention, and referring to fig. 1, the unlocking control circuit for a deployment mechanism includes: the device comprises a control module, at least one bridge wire 1, a detonation switch module 2 corresponding to the bridge wire one by one, a product plug 3 and a resistance switching module 4 corresponding to the bridge wire 1 one by one, wherein the resistance switching module 4 comprises a first current limiting unit R1 and a second current limiting unit R2, the resistance value of the first current limiting unit R1 is larger than that of the second current limiting unit R2, the product plug 3 comprises a first plug group 31 corresponding to the bridge wire 1 one by one, the first plug group 31 comprises a first positive end I < 1+ > and a first negative end I < 1 > -, and the first positive end I < 1+ > and the first negative end I < 1 > -, in the same first plug group 31, are connected;
The input end of the resistance switching module 4 is connected with the positive electrode power supply end V+, the output end of the resistance switching module 4 is connected with the input end of the corresponding detonation switch module 2, and the control end of the resistance switching module 4 is connected with the control module;
The output end of the detonation switch module 2 is electrically connected with the first positive end I1+ of the corresponding first plug group 31, the control end of the detonation switch module 2 is connected with the control module, the detonation switch module 2 comprises at least one detonation switch connected between the input end and the output end of the detonation switch module 2, and the control module is used for controlling the conduction of at least one detonation switch of the detonation switch module 2 corresponding to the mechanism to be unfolded when receiving an unlocking signal of the mechanism to be unfolded;
the first negative electrode end I1-of the first plug group 31 is connected with the first end of the corresponding bridge wire 1, and the second end of the bridge wire 1 is connected with the negative electrode power supply end V-;
The bridge wire 1 is arranged in a set distance of the mechanism to be unfolded;
The control module is used for controlling the first current limiting unit R1 to be connected between the input end and the output end of the resistance switching module 4 when the unlocking signal is received and the resistance of the bridge wire 1 corresponding to the mechanism to be unfolded is determined to be smaller than or equal to a resistance set value, and controlling the second current limiting unit R2 to be connected between the input end and the output end of the resistance switching module 4 when the resistance of the bridge wire 1 corresponding to the mechanism to be unfolded is determined to be larger than the resistance set value.
The mechanism to be deployed may be a solar panel or antenna on a spacecraft, or other movable component. The bridge wire 1 is supported by a high-temperature heating material and mainly plays a role in achieving ignition at an initiation temperature so as to enable the mechanism to be unfolded. The product plug 3 includes a plurality of groups of first plug groups 31, one first plug group 31 corresponds to one bridge wire 1, one bridge wire 1 corresponds to one mechanism to be unfolded, and the product plug 3 in this embodiment may include a plurality of groups of first plug groups 31, so as to realize that the unlocking control circuit of the unfolding mechanism simultaneously controls a plurality of different mechanisms to be unfolded. The first plug group 31 comprises a first positive terminal i1+ and a first negative terminal I1-, the first positive terminal i1+ and the first negative terminal I1-belonging to the same first plug group 31 being electrically connected. The resistance switching module 4 includes two devices with different resistance values, the first current limiting unit R1 has a larger resistance value, which may be a current limiting resistor, and the second current limiting unit R2 has a smaller resistance value, which may be a fuse. The positive electrode power supply end V+ and the negative electrode power supply end V-can be connected with a detonation power supply to supply power to the whole control circuit, wherein the detonation power supply can be a storage battery, when the mechanism to be unfolded is an initiating explosive device, the detonation power supply generally selects the storage battery, the storage battery can provide large instant current, the capability of a satellite discharge switch does not need to be considered, other movable components can select a bus to supply power, and the instant current is small.
The resistance switching module 4 may further include a first switch and a second switch, where the first switch and the first current limiting unit R1 are connected in series between an input end and an output end of the resistance switching module 4, the second switch and the second current limiting unit R2 are connected in series between the input end and the output end of the resistance switching module 4, and the control module is respectively connected with a control end of the first switch and a control end of the second switch, where the control module is configured to control whether the first current limiting unit R1 is connected to the circuit by controlling a conduction state of the first switch, and control whether the second current limiting unit R2 is connected to the circuit by controlling a conduction state of the second switch. The control module controls one of the first current limiting unit R1 and the second current limiting unit R2 to be connected between the input end and the output end of the resistance switching module 4 when receiving the unlocking signal. Alternatively, the resistance switching module 4 may further include a single pole double throw switch, and the control module controls one of the first current limiting unit R1 and the second current limiting unit R2 to be connected to the circuit through the single pole double throw switch.
The operating principle of the unlocking control circuit of the unfolding mechanism is as follows: when the control module receives an unlocking signal of the mechanism to be unfolded, if the resistance value of the bridge wire 1 corresponding to the mechanism to be unfolded is determined to be smaller than or equal to a resistance value set value, the first current limiting unit R1 is controlled to be connected between the input end and the output end of the resistance switching module 4, at least one detonation switch in the detonation switch module 2 is controlled to be closed, and then current flows from the positive electrode power supply end V+ to the negative electrode power supply end V-sequentially through the first current limiting unit R1, the detonation switch module 2 and the first positive electrode end I1+ and the first negative electrode end I1 of the first plug group 31. The bridge wire 1 is subjected to heat accumulation by the current flowing through the bridge wire, and the mechanism to be unfolded can be unfolded after the set temperature is reached. For example, if the bridge wire 1 is an initiating explosive device, the internal resistance is small, and a current limiting resistor is not added, the current in the circuit is too large, and accidents are easy to be caused. In the embodiment, when the internal resistance of the bridge wire 1 corresponding to the mechanism to be expanded is smaller, a current limiting resistor is connected in series in the circuit so as to reduce the current in the circuit, ensure the safe and stable operation of the circuit and improve the reliability of the circuit. When the control module receives an unlocking signal of the mechanism to be unfolded, if the resistance of the bridge wire 1 corresponding to the mechanism to be unfolded is determined to be larger than a resistance value flow set value, the second current limiting unit R2 is controlled to be connected between the input end and the output end of the resistance switching module 4, at least one detonation switch in the detonation switch module 2 is controlled to be closed, and then current flows from the positive electrode power supply end V+ to the negative electrode power supply end V-sequentially through the second current limiting unit R2, the detonation switch module 2 and the first positive electrode end I1+, the first negative electrode end I1-of the first plug group 31, and the bridge wire 1. The bridge wire 1 is subjected to heat accumulation by the current flowing through the bridge wire, and the mechanism to be unfolded can be unfolded after the set temperature is reached. Through the setting of resistance switching module 4 for a exhibition opening mechanism unblock control circuit is compatible different bridge silk 1, and the flexibility is high.
The control module selects the corresponding first current limiting unit or second current limiting unit to be connected into the circuit according to the resistance value of the bridge wire corresponding to the mechanism to be unfolded, so that bridge wires with different resistance values arranged in the circuit are met, and the compatibility of the circuit is improved.
Fig. 2 is a schematic circuit diagram of another unlocking control circuit for a deployment mechanism according to an embodiment of the present invention, referring to fig. 2, optionally, the detonation switch module 2 includes at least two detonation switch groups 21, and the detonation switch groups 21 include a first control switch K1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a detonation switch Q1;
The first end of the first control switch K1 is connected with the negative electrode power supply end V-, the second end of the first control switch K1 is connected with the first end of the third resistor R3, and the control end of the first control switch K1 is connected with the control module;
The second end of the third resistor R3 is connected with the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected with the control end of the detonation switch Q1;
the first end of the fifth resistor R5 is connected with the second end of the third resistor R3, and the second end of the fifth resistor R5 is connected with the first end of the detonating switch Q1;
The first end of the initiation switch Q1 is connected with the output end of the corresponding resistance switching module 4, and the second end of the initiation switch Q1 is connected with the first positive electrode I < 1+ > of the corresponding first plug group 31;
The control module is used for switching on the detonation switches Q1 corresponding to different numbers of the mechanisms to be unfolded according to different unfolding modes of the mechanisms to be unfolded.
The detonation switch Q1 is a MOS tube, specifically a PMOS tube, and the first control switch K1 can be a relay. The detonation switch module 2 may include at least two detonation switch groups 21, and a plurality of detonation switch groups 21 are connected in parallel. When the first control switch K1 is turned off, the control end of the detonation switch Q1 is connected with the positive electrode power supply end V+ through the fourth resistor R4, the fifth resistor R5 and the resistance switching module 4, and the high level output by the positive electrode power supply end V+ controls the detonation switch Q1 to be turned off. When the first control switch K1 is closed, a current flowing path is formed among the positive electrode power supply end V+, the resistance switching module 4, the fifth resistor R5, the third resistor R3, the first control switch K1 and the negative electrode power supply end V-, the third resistor R3 and the fifth resistor R5 form a voltage dividing circuit, and the divided voltage of the third resistor R3 is transmitted to the control end of the initiation switch Q1 to control the initiation switch Q1 to be conducted. When the mechanism to be unfolded comprises a plurality of unfolding modes in the unfolding process, different numbers of the detonation switches Q1 in the detonation switch module 2 can be conducted under different unfolding modes so as to match detonation currents corresponding to different unfolding modes. Meanwhile, when the maximum current bearable by one detonation switch Q1 is larger than the unlocking current, a plurality of detonation switches Q1 in one detonation switch module 2 can be controlled to be simultaneously conducted, so that the effect of shunting is achieved, the MOS tube is prevented from being damaged by large current, and the reliability of a circuit is ensured.
Fig. 3 is a schematic circuit diagram of another unlocking control circuit for a deployment mechanism according to an embodiment of the present invention, and referring to fig. 3, optionally, the detonation switch module 2 further includes a first control switch K1, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;
The first end of the first control switch K1 is connected with the negative electrode power supply end V-, the second end of the first control switch K1 is connected with the first end of the third resistor R3, the control end of the first control switch K1 is connected with the control module, and the second end of the third resistor R3 is connected with the first end of the fourth resistor R4;
The first end of the detonation switch Q1 is connected with the output end of the corresponding resistance switching module 4, the second end of the detonation switch Q1 is connected with the first positive end I < 1+ > of the corresponding first plug group 31, and the control end of the detonation switch Q1 is connected with the second end of the fourth resistor R4;
The first end of the fifth resistor R5 is connected to the second end of the third resistor R3, and the first end of the detonation switch Q1 is connected to the second end of the fifth resistor R5.
The detonation switch module 2 may include one detonation switch Q1 or at least two detonation switches Q2, the at least two detonation switches Q1 being connected in parallel between the input and output of the detonation switch module 2. The control ends of the detonation switches Q1 in the same detonation switch module 2 are identical in access signal, so that the control module can control the detonation switches Q1 to be turned on or turned off simultaneously. When the maximum current bearable by one detonation switch Q1 is larger than the unlocking current, all the detonation switches Q1 in one detonation switch module 2 can be simultaneously controlled to be simultaneously conducted, so that the effect of shunting is achieved, the MOS tube is prevented from being damaged by large current, and the reliability of the circuit is ensured. The unlocking current is the current in the bridge wire 1 corresponding to the mechanism to be unfolded.
The detonation switch module 2 in fig. 2 and the detonation switch module 2 in fig. 3 are different in structure, and correspond to two different structures of the detonation switch module 2 respectively, and a user can select one structure in fig. 2 or fig. 3 according to requirements. The first control switch K1 can be a magnetic latching relay or an electric latching relay, and when the bridge wire 1 is a bridge wire 1 with long power-on time, such as a hot knife and a pin puller, the first control switch K1 selects the magnetic latching relay. When the bridge wire 1 is a bridge wire 1 with short power-on time, such as an initiating explosive device, the first control switch K1 selects an electric holding relay.
With continued reference to fig. 3, optionally, the deployment mechanism unlocking control circuit further includes a positive line switch module 5, where the positive line switch module 5 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second control switch K2, and at least one positive line switch Q2;
the first end of the positive line switch Q2 is connected with the positive power supply end V+, and the second end of the positive line switch Q2 is connected with the input end of each resistance switching module 4;
the first end of the sixth resistor R6 is connected with the positive power supply end V+, the second end of the sixth resistor R6 is connected with the first end of the seventh resistor R7, the second end of the seventh resistor R7 is connected with the first end of the second control switch K2, the first end of the eighth resistor R8 is connected with the second end of the sixth resistor R6, and the control end of the positive switch Q2 is connected with the second end of the eighth resistor R8;
The second end of the second control switch K2 is connected with the negative electrode power supply end V-, the control end of the second control switch K2 is connected with the control module, and the control module is used for controlling the second control switch K2 to be closed when receiving an unlocking signal so as to enable the positive line switch Q2 to be conducted.
Optionally, the second control switch K2 is a relay, and the positive line switch Q2 is a MOS tube, specifically a PMOS tube. The number of the positive line switches Q2 can be multiple, the positive line switches Q2 are connected in parallel, and the number of the positive line switches Q2 is determined by the current of the whole loop bridge wire 1 for one-time initiation. When the second control switch K2 is turned off, the control end of the positive line switch Q2 is connected to the positive electrode power supply end v+ through the eighth resistor R8 and the sixth resistor R6, and the positive electrode power supply end v+ outputs a high level to control the positive line switch Q2 to be turned off. When the second control switch K2 is closed, a current flowing path is formed among the positive electrode power supply end V+, the sixth resistor R6, the seventh resistor R7, the second control switch K2 and the negative electrode power supply end V-, the sixth resistor R6 and the seventh resistor R7 form a voltage dividing circuit, and the voltage divided by the seventh resistor R7 is transmitted to the control end of the positive line switch Q2 to control the positive line switch Q2 to be conducted. When the control module receives the unlocking signal, the positive line switch Q2 and the detonation switch Q1 are controlled to be closed, so that the current flows in the bridge wire 1 to heat, and finally the mechanism to be unfolded is unlocked.
When the positive line switch module 5 is arranged to ensure that the positive line switch Q2 and the initiation switch Q1 are both closed, the structure to be unfolded is unfolded, the misoperation of the mechanism to be unfolded is avoided, and the reliability of circuit control is ensured.
With continued reference to fig. 3, optionally, the deployment mechanism unlocking control circuit further includes a loop switch module 6, where the loop switch module 6 includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, at least one loop switch Q3, and a third control switch K3;
The first end of the third control switch K3 is connected with the positive electrode power supply end V+, the second end of the third control switch K3 is connected with the first end of the ninth resistor R9, the control end of the third control switch K3 is connected with the control module, and the control module is used for controlling the third control switch K3 to be closed when receiving an unlocking signal so as to enable the loop switch Q3 to be conducted;
The first end of the loop switch Q3 is connected with the negative electrode power supply end V-, and the second end of the loop switch Q3 is connected with the second end of each bridge wire 1;
A second end of the ninth resistor R9 is connected with a first end of the tenth resistor R10, and a control end of the loop switch Q3 is connected with a second end of the tenth resistor R10;
the first end of the eleventh resistor R11 is connected to the second end of the ninth resistor R9, and the second end of the eleventh resistor R11 is connected to the negative supply terminal V-.
Optionally, the third control switch K3 is a relay, and the loop switch Q3 is a MOS transistor, specifically an NMOS transistor. The number of the loop switches Q3 may be plural, and the plurality of loop switches Q3 are connected in parallel. When the third control switch K3 is turned off, the control end of the loop switch Q3 is connected to the negative electrode power supply end V-through the tenth resistor R10 and the eleventh resistor R11, and the low-level control loop switch Q3 output by the negative electrode power supply end V-is turned off. When the third control switch K3 is closed, a current flowing path is formed among the positive electrode power supply end V+, the third control switch K3, the ninth resistor R9, the eleventh resistor R11 and the negative electrode power supply end V-, the ninth resistor R9 and the eleventh resistor R11 form a voltage dividing circuit, and the voltage obtained by dividing the eleventh resistor R11 is transmitted to the control end of the loop switch Q3 to control the loop switch Q3 to be conducted. When the control module receives the unlocking signal, the positive line switch Q2, the return line switch Q3 and the corresponding detonating switch Q1 are controlled to be closed, so that the current flows in the bridge wire 1 to heat, and finally the mechanism to be unfolded is unlocked.
After the loop switch module 5 is arranged, when the positive line switch Q2, the loop switch Q3 and the initiation switch Q1 are all closed, the structure to be unfolded is unfolded, misoperation of the mechanism to be unfolded is avoided, and the reliability of circuit control is further guaranteed. Meanwhile, the detonation switch Q1, the positive line switch Q2 and the return line switch Q3 are all MOS tubes, the current carrying capacity of the MOS tubes is high, the current which can flow in the circuit is high, and the applicability of the circuit is improved. Meanwhile, the current bearing capacity of the NMOS tube is larger than that of the PMOS tube, and the NMOS tube is used for simply and reliably designing loop wires, so that when the current in a circuit is larger, the number of the MOS tubes arranged in the loop wire switch module 6 is obviously reduced, and the cost is saved.
With continued reference to fig. 3, the optional deployment mechanism unlocking control circuit further comprises a flying plug 7, wherein the flying plug 7 comprises a second plug group 71 in one-to-one correspondence with the first plug group 31, the second plug group 71 comprises a second positive terminal i2+ and a second negative terminal i2-, the second positive terminal i2+ is connected with the first positive terminal i1+ of the corresponding first plug group 31, and the second negative terminal I2-is connected with the second negative terminal I2 of the corresponding first plug group 31;
the flying plug 7 is connected with a control module, and the control module is used for controlling the second positive terminal I < 2+ > and the second negative terminal I < 2 > -of the corresponding second plug group 71 to be connected when receiving the unlocking signal.
The first positive terminal i1+ comprised in the first plug set 3 is indirectly connected to the first negative terminal I1-via a corresponding second plug set 71. The circuit where the detonation switch module 2 is located is connected with the protection plug 7 in series, so that misoperation of a mechanism to be unfolded can be avoided, the bridge wire 1 is particularly sensitive and easy to perform misoperation, the protection plug 7 is not connected during ground test of other functions, when whether the mechanism to be unfolded can be unfolded normally is tested, the protection plug 7 is connected for testing, the protection plug 7 is pulled out after the testing, and finally the protection plug 7 is inserted before satellite installation.
With continued reference to fig. 3, the optional unlocking control circuit for the unfolding mechanism further comprises electrostatic protection modules 8 corresponding to the bridge wires 1 one by one, wherein a first end of each electrostatic protection module 8 is connected with a first end of the corresponding bridge wire 1, and a second end of each electrostatic protection module 8 is connected with a negative electrode power supply end V-.
The bridge wires 1 are sensitive to electrostatic discharge and may malfunction due to electrostatic discharge, so that the first end of each bridge wire is correspondingly connected to an electrostatic protection module. Optionally, the electrostatic protection module 8 is a resistor with a resistance value of 100kΩ, and the discharging current is connected to the negative electrode power supply terminal V-through the resistor, so that the two ends of the bridge wire 1 are ensured not to cause false ignition due to discharging caused by electrostatic accumulation, and the reliability of the circuit is improved.
Fig. 4 is a circuit schematic diagram of a detection circuit in a deployment mechanism unlocking control circuit according to an embodiment of the present invention, and referring to fig. 3 and 4, optionally, the deployment mechanism unlocking control circuit further includes a detection circuit corresponding to the first control switch K1 one by one, where the detection circuit includes a linkage switch K4 synchronized with the state of the first control switch K1, a twelfth resistor R12, and an impedance detection module 9;
The first end of the linkage switch K4 is grounded GND, the second end of the linkage switch K4 is connected with a state quantity detection end B0 of the detection circuit, and the state quantity detection end B0 is used for being connected with a first detection end of the impedance detection module 9;
the first end of the twelfth resistor R12 is connected with the second end of the linkage switch K4, and the second end of the twelfth resistor R12 is grounded to GND;
The second detection end of the impedance detection module 9 is grounded.
The unfolding mechanism unlocking control circuit can be used in a spacecraft. The linkage switch K4 and the first control switch K1 belong to the same relay, and the switch states of the linkage switch K4 and the first control switch K1 are the same, namely when the first control switch K1 is closed, the linkage switch K4 is also closed; when the first control switch K1 is turned off, the interlock switch K4 is also turned off, and thus, the state of the first control switch K1 can be determined according to the state of the interlock switch K4. If the first control switch K1 is closed, and the interlock switch K4 is also closed, the state quantity detection terminal B0 is shorted to the ground by the interlock switch K4, and the impedance between the state quantity detection terminal B0 and the ground is 0, and the impedance detected by the impedance detection module 9 is 0. When the first control switch K1 is turned on, the interlock switch K4 is also turned on, the impedance between the state quantity detection terminal B0 and the ground is the resistance value of the twelfth resistor R12, and at this time, the impedance detected by the impedance detection module 9 is the resistance value of the twelfth resistor R12. Therefore, the state of the first control switch K1 can be determined by the impedance detected by the impedance detection module 9, so as to detect the state of the first control switch K1 when the spacecraft is not powered on, wherein the impedance detection module 9 can be a multimeter. Optionally, the detection circuit further includes a thirteenth resistor R13 and a voltage detection module 10, a first end of the thirteenth resistor R13 is connected to the preset voltage V0, a second end of the thirteenth resistor R13 is connected to the first end of the twelfth resistor R12, and the voltage detection module 10 is configured to be electrically connected to the state quantity detection end B0. When the spacecraft is powered on, if the impedance is still detected, the impedance may be detected inaccurately, so a thirteenth resistor R13 and a voltage detection module 10 may be set, and when the spacecraft is not powered on, the voltage of the first end of the thirteenth resistor R13 is 0, and at this time, the impedance detection module 9 is used to detect the impedance without being affected. When the spacecraft is electrified, the voltage at the first end of the thirteenth resistor R13 is a preset voltage V0, at this time, the twelfth resistor R12 and the thirteenth resistor R13 form a voltage dividing network, when the first control switch K1 is disconnected, the linkage switch K4 is also disconnected, the voltage detection module 10 is equivalent to be grounded, and the detected voltage is 0. When the first control switch K1 is closed, the interlock switch K4 is also closed, and the voltage detected by the voltage detection module 10 is a voltage division of the twelfth resistor R12 and the thirteenth resistor R13 to the preset voltage V0. Accordingly, the state of the first control switch K1 may be determined according to the voltage value detected by the voltage detection module 10. It should be noted that, when the spacecraft is not powered on, only the impedance detection module 9 is connected to the state quantity detection terminal B0, and when the spacecraft is powered on, only the voltage detection module 10 is connected to the state quantity detection terminal B0, so as to avoid mutual interference between the two. Optionally, the detection circuit further includes a fourteenth resistor R14 and a filter capacitor C, where a first end of the fourteenth resistor R14 is connected to the preset voltage V0, and a second end of the fourteenth resistor R is connected to the first end of the filter capacitor C, and a second end of the filter capacitor C is grounded GND. The fourteenth resistor R14 and the filter capacitor C form a filter network, have a filtering function, and can prevent clutter from interfering the impedance detection module 9 or the voltage detection module 10, thereby affecting the detection accuracy.
Besides the first control switch, the second control switch and the third control switch can be provided with corresponding detection circuits to detect the state of the switch, and the on-off state of the switch can be judged by using the impedance between the state quantity remote measuring point and the ground on the ground measuring interface.
The embodiment of the invention also provides a spacecraft, which comprises the unfolding mechanism unlocking control circuit. The beneficial effects of the spacecraft are the same as those of the unlocking control circuit of the unfolding mechanism, and are not repeated here.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (9)

1. An unlock control circuit for a deployment mechanism, comprising: the device comprises a control module, at least one bridge wire, a detonation switch module in one-to-one correspondence with the bridge wire, a product plug and a resistance switching module in one-to-one correspondence with the bridge wire, wherein the resistance switching module comprises a first current limiting unit and a second current limiting unit, the resistance value of the first current limiting unit is larger than that of the second current limiting unit, the product plug comprises a first plug group in one-to-one correspondence with the bridge wire, the first plug group comprises a first positive electrode end and a first negative electrode end, and the first positive electrode end and the first negative electrode end of the same first plug group are connected;
the input end of the resistance switching module is connected with the positive electrode power supply end, the output end of the resistance switching module is connected with the input end of the corresponding detonation switch module, and the control end of the resistance switching module is connected with the control module;
The control module is used for controlling the conduction of at least one detonation switch of the detonation switch module corresponding to the mechanism to be unfolded when receiving an unlocking signal of the mechanism to be unfolded;
The first negative end of the first plug group is connected with the first end of the corresponding bridge wire, and the second end of the bridge wire is connected with the negative electrode power supply end;
the bridge wire is arranged in a set distance of the mechanism to be unfolded;
The control module is used for controlling the first current limiting unit to be connected between the input end and the output end of the resistance switching module when the unlocking signal is received and the resistance value of the bridge wire corresponding to the mechanism to be unfolded is smaller than or equal to a resistance value set value, and controlling the second current limiting unit to be connected between the input end and the output end of the resistance switching module when the resistance of the bridge wire corresponding to the mechanism to be unfolded is larger than the resistance value set value;
The mechanism to be unfolded comprises a plurality of unfolding modes in the unfolding process, and different numbers of detonation switches in the detonation switch module are conducted under different unfolding modes so as to match detonation currents corresponding to different unfolding modes.
2. The deployment mechanism unlock control circuit of claim 1, wherein said detonation switch module comprises at least two detonation switch groups, said detonation switch groups comprising a first control switch, a third resistor, a fourth resistor, a fifth resistor, and said detonation switch;
The first end of the first control switch is connected with the negative electrode power supply end, the second end of the first control switch is connected with the first end of the third resistor, and the control end of the first control switch is connected with the control module;
The second end of the third resistor is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the control end of the detonation switch;
the first end of the fifth resistor is connected with the second end of the third resistor, and the second end of the fifth resistor is connected with the first end of the detonation switch;
the first end of the detonation switch is connected with the output end of the corresponding resistance switching module, and the second end of the detonation switch is connected with the first positive electrode end of the corresponding first plug group;
the control module is used for conducting different numbers of detonating switches according to different unfolding modes of the mechanism to be unfolded.
3. The deployment mechanism unlock control circuit of claim 1 further comprising a positive switch module comprising a sixth resistor, a seventh resistor, an eighth resistor, a second control switch, and at least one positive switch;
the first end of the positive line switch is connected with the positive electrode power supply end, and the second end of the positive line switch is connected with the input end of each resistance switching module;
The first end of the sixth resistor is connected with the positive power supply end, the second end of the sixth resistor is connected with the first end of the seventh resistor, the second end of the seventh resistor is connected with the first end of the second control switch, the first end of the eighth resistor is connected with the second end of the sixth resistor, and the control end of the positive switch is connected with the second end of the eighth resistor;
The second end of the second control switch is connected with the negative electrode power supply end, the control end of the second control switch is connected with the control module, and the control module is used for controlling the second control switch to be closed when receiving the unlocking signal so as to enable the positive line switch to be conducted.
4. The deployment mechanism unlock control circuit of claim 3, further comprising a loop switch module comprising a ninth resistor, a tenth resistor, an eleventh resistor, a third control switch, and at least one loop switch;
The first end of the third control switch is connected with the positive electrode power supply end, the second end of the third control switch is connected with the first end of the ninth resistor, the control end of the third control switch is connected with the control module, and the control module is used for controlling the third control switch to be closed when receiving the unlocking signal so as to conduct the loop switch;
The first end of the loop switch is connected with the negative electrode power supply end, and the second end of the loop switch is connected with the second end of each bridge wire;
the second end of the ninth resistor is connected with the first end of the tenth resistor, and the control end of the loop switch is connected with the second end of the tenth resistor;
The first end of the eleventh resistor is connected with the second end of the ninth resistor, and the second end of the eleventh resistor is connected with the negative electrode power supply end.
5. The deployment mechanism unlock control circuit of claim 4 wherein said detonation switch, said positive line switch, and said return line switch are all MOS transistors.
6. The deployment mechanism unlock control circuit of claim 1, further comprising a flying plug including a second plug set in one-to-one correspondence with said first plug set, said second plug set including a second positive terminal connected to a first positive terminal of a corresponding said first plug set and a second negative terminal connected to a second negative terminal of a corresponding said first plug set;
The flight plug is connected with the control module, and the control module is used for controlling the second positive electrode end and the second negative electrode end of the corresponding second plug group to be connected when the unlocking signal is received.
7. The deployment mechanism unlock control circuit of claim 1 further comprising an electrostatic protection module in one-to-one correspondence with said bridge wires, a first end of said electrostatic protection module being connected to a corresponding first end of said bridge wires, a second end of said electrostatic protection module being connected to said negative supply end.
8. The deployment mechanism unlock control circuit of claim 2, further comprising a detection circuit in one-to-one correspondence with said first control switch, said detection circuit comprising a ganged switch synchronized with a state of said first control switch, a twelfth resistor, and an impedance detection module;
The first end of the linkage switch is grounded, the second end of the linkage switch is connected with the state quantity detection end of the detection circuit, and the state quantity detection end is used for being connected with the first detection end of the impedance detection module;
The first end of the twelfth resistor is connected with the second end of the linkage switch, and the second end of the twelfth resistor is grounded;
the second detection end of the impedance detection module is grounded.
9. A spacecraft comprising the deployment mechanism unlock control circuit of any of claims 1-8.
CN202311517939.0A 2023-11-15 2023-11-15 Unfolding mechanism unlocking control circuit and spacecraft Active CN117382917B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311517939.0A CN117382917B (en) 2023-11-15 2023-11-15 Unfolding mechanism unlocking control circuit and spacecraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311517939.0A CN117382917B (en) 2023-11-15 2023-11-15 Unfolding mechanism unlocking control circuit and spacecraft

Publications (2)

Publication Number Publication Date
CN117382917A CN117382917A (en) 2024-01-12
CN117382917B true CN117382917B (en) 2024-05-28

Family

ID=89435765

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311517939.0A Active CN117382917B (en) 2023-11-15 2023-11-15 Unfolding mechanism unlocking control circuit and spacecraft

Country Status (1)

Country Link
CN (1) CN117382917B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103997031A (en) * 2014-05-16 2014-08-20 上海微小卫星工程中心 Initiating explosive device control circuit and controller using same
CN111392071A (en) * 2020-03-17 2020-07-10 中国科学院微小卫星创新研究院 Initiating explosive device detonation control system and testing method thereof
CN113479349A (en) * 2021-04-25 2021-10-08 上海空间电源研究所 Solar sailboard unfolding circuit for satellite
CN113746472A (en) * 2021-08-19 2021-12-03 上海卫星工程研究所 Matrix type initiating explosive device driving circuit for deep space probe and control method thereof
CN218506160U (en) * 2022-04-28 2023-02-21 上海空间电源研究所 Unlocking application circuit of satellite detonating device
CN218601423U (en) * 2022-10-27 2023-03-10 苏州馥昶空间技术有限公司 Switch state detection circuit and spacecraft

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10518907B2 (en) * 2016-09-13 2019-12-31 Ensign-Bickford Aerospace & Defense Company Spacecraft device initiation system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103997031A (en) * 2014-05-16 2014-08-20 上海微小卫星工程中心 Initiating explosive device control circuit and controller using same
CN111392071A (en) * 2020-03-17 2020-07-10 中国科学院微小卫星创新研究院 Initiating explosive device detonation control system and testing method thereof
CN113479349A (en) * 2021-04-25 2021-10-08 上海空间电源研究所 Solar sailboard unfolding circuit for satellite
CN113746472A (en) * 2021-08-19 2021-12-03 上海卫星工程研究所 Matrix type initiating explosive device driving circuit for deep space probe and control method thereof
CN218506160U (en) * 2022-04-28 2023-02-21 上海空间电源研究所 Unlocking application circuit of satellite detonating device
CN218601423U (en) * 2022-10-27 2023-03-10 苏州馥昶空间技术有限公司 Switch state detection circuit and spacecraft

Also Published As

Publication number Publication date
CN117382917A (en) 2024-01-12

Similar Documents

Publication Publication Date Title
US11073559B2 (en) Electrical system and method for diagnosing the functionality of power relays in an electrical system
CN205355895U (en) Battery protection circuit
CN111392071B (en) Initiating explosive device detonation control system and testing method thereof
CN110208621B (en) Carrier rocket initiating explosive device path testing system and testing method
CN106468761A (en) A kind of aircraft priming system short-circuit protection circuit and state switching method
CN106523189A (en) Rocket firing control system
CN102608430A (en) Capacitance check and voltage monitoring circuit for use with a circuit protection device
CN117382917B (en) Unfolding mechanism unlocking control circuit and spacecraft
US8327764B2 (en) Pyroelectronic detonator provided with a circuit for shunting an electrothermal bridge
CN111964542A (en) Initiating explosive device detonation circuit, stratospheric airship and nondestructive testing method
CN105301492B (en) A kind of internal fuse protected qualification method in high-voltage capacitor unit
CN217543245U (en) Carrier rocket initiating explosive device resistance test circuit
WO2018158011A1 (en) Control and/or trigger unit, battery cell, cell module, battery, and apparatus
CN106166990A (en) A kind of startup power circuit
CN109546627A (en) A kind of lithium battery group safe charging guard method and its charge protector
CN110783587B (en) Device for improving thermal battery activation loop reliability and thermal battery system
CN212458149U (en) Initiating explosive device detonation circuit and stratospheric airship
CN209462010U (en) A kind of lithium battery group safe charging protection circuit
CN221595685U (en) Electricity testing coded lock based on wireless carrier power supply communication
CN102593803A (en) Systems, methods, and apparatus for preventing electromigration between plasma gun electrodes
CN201765288U (en) Measuring box for electric explosive device
CN113039693A (en) Separating device for an electrochemical energy storage system
CN212012175U (en) Load power supply circuit
CN221487350U (en) Detection protection device for power line, electric connection equipment and electric equipment
CN211830182U (en) Power supply protection circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant