CN114551153A - Magnetic latching relay rebound self-recovery application circuit for aerospace - Google Patents
Magnetic latching relay rebound self-recovery application circuit for aerospace Download PDFInfo
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- CN114551153A CN114551153A CN202210126534.3A CN202210126534A CN114551153A CN 114551153 A CN114551153 A CN 114551153A CN 202210126534 A CN202210126534 A CN 202210126534A CN 114551153 A CN114551153 A CN 114551153A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/001—Functional circuits, e.g. logic, sequencing, interlocking circuits
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Abstract
The invention discloses a magnetic latching relay rebound self-recovery application circuit for aerospace, which comprises: a magnetic latching relay drive circuit; a trigger signal circuit; a latch signal circuit; a third backup circuit and a second backup circuit; an interference suppression circuit. Compared with the existing direct control conversion method, the method adopts a method of triggering latch and holding, and avoids the defect that the state of the relay is changed and cannot be automatically recovered due to the jitter or jump caused by external reasons. Compared with the conventional mode of not processing the control signal of the relay, the invention can ensure that the relay can still be quickly recovered even when the relay jumps through the design of jump prevention self-recovery under the condition that the relay receives jump which is not influenced by the outside. Meanwhile, backup redundancy processing is carried out on the fault self-recovery circuit, and the relay can be further ensured to be capable of carrying out quick and effective self-recovery, so that the adaptability and the reliability of the relay in a severe environment are improved.
Description
Technical Field
The invention relates to the technical field of subminiature magnetic latching relays, in particular to a magnetic latching relay rebound self-recovery application circuit for aerospace.
Background
Magnetic latching relay structures in China were first found in the aerospace field. In the aerospace field, in order to ensure the reliability of an electronic circuit system, one circuit module or system is often selected to be subjected to double backup, so that when one system fails, the other backup system can be switched back to increase the reliability of an aerospace electronic system. In which the magnetic latching relay plays a critical role during the back-and-forth selection and switching. How to use the good magnetic latching relay and how to perfectly exert various performances of the good magnetic latching relay is a difficult problem in front of aerospace system designers.
The magnetic latching relay is used as a novel energy-saving component, can act under the excitation of the coil and is always kept at the same position under the non-excitation state, and the power consumption of the coil is low. Like other electromagnetic relays, magnetic latching relays provide automatic turn-on and turn-off of the circuit. The magnetic latching relay has the advantages that the normally closed state or the normally open state of the magnetic latching relay completely depends on the action of permanent magnetic steel, and the switching state of the magnetic latching relay is triggered by pulse electric signals with certain width to complete the switching. With the development and improvement of national defense technology level, the application of the magnetic latching relay in various industries is gradually increased, and more guarantees are provided for the development of national society.
At present, in the field of magnetic latching relay, the main application circuits are: "design of a kind of magnetic latching relay drive circuit", instrument and meter user, 2008 03 th, have disclosed a kind of general drive circuit, the drive circuit that IR2110 is formed in two routes of signal triggering of central control unit output, the drive circuit control is by the lapped H bridge main circuit of MOSFET, realize the magnetic latching relay and switch over each other between two steady states. The method only provides a driving circuit, once the secondary holding relay jumps due to stress or error pulse, the secondary holding relay cannot be recovered, and only the secondary holding relay can resend the instruction and switch back, so that the method is time-consuming and labor-consuming and cannot meet the reliability requirements of systems such as aerospace systems.
The patent application number is CN200910102534.4, the name "an energy-conserving magnetic latching relay circuit", disclose an energy-conserving magnetic latching relay circuit, apply a positive pulse to the coil of the relay at the moment of the relay power-on, drive the relay to change; when the input end is cut off, a reverse pulse is applied to the coil of the relay to drive the relay to recover. However, it only introduces a command control method for a relay, and when the relay abnormally jumps, the relay cannot automatically return.
The patent application number CN201820290520.4, entitled "a magnetic latching relay power-off reset circuit", discloses a magnetic latching relay power-off reset circuit, which comprises a voltage power-off detection circuit, a magnetic latching relay circuit, an energy storage circuit and a drive circuit; the voltage power failure detection circuit, the energy storage circuit and the driving circuit are all connected with the magnetic latching relay circuit; the magnetic latching relay circuit comprises a magnetic latching relay RY1, a second diode D2 and a third diode D3; the anode of the second diode D2 is connected with the No. 1 pin of the magnetic latching relay RY1, the cathode of the second diode D2 is connected with the No. 2 pin of the magnetic latching relay RY1, and the anode of the third diode D3 is connected with the No. 3 pin of the magnetic latching relay RY 1; the energy storage circuit is connected with a No. 2 pin of the magnetic latching relay RY 1. However, it only introduces a power-down reset circuit of the magnetic latching relay, and does not provide a solution for the abnormal jump of the relay when the relay is not powered down.
In summary, the prior art does not provide a method for automatically recovering when the relay has no power failure but has abnormal jump, and the reliability requirements of systems such as aerospace and the like cannot be met.
Disclosure of Invention
The invention aims to provide a magnetic latching relay rebound self-recovery application circuit for aerospace.
The invention provides a magnetic latching relay rebound self-recovery application circuit for aerospace, which comprises: a latch signal circuit for holding a magnetic state of the magnetic latching relay; the control signal circuit adopts a small-capacity capacitor to perform bypass processing on noise influencing a system signal, is used for performing anti-jitter filtering and performs magnetic interference suppression; the three-out-of-two combination logic circuit is used for judging the output state of the magnetic latching relay by combining logic; the three-out-of-two combinational logic circuit is connected with a plurality of magnetic latching electrical appliance circuits.
Preferably, the pulse signal before processing is connected in parallel with a first capacitor, one end of the first capacitor is grounded, and the other end of the first capacitor is connected with a signal input port of the signal shaping processor; the trigger signal is connected with the non-inverting device and is connected with a signal control port of the signal shaping processor; the latch signal and the phase inverter are connected to the latch, the output port of the signal shaping processor is connected with the input end of the latch, the output end of the latch is connected with one end of the second capacitor in parallel, the other end of the second capacitor is grounded, and the processed pulse signal is output.
Preferably, in the trigger signal circuit, when the TRIG signal and the pulse signal before processing are respectively and simultaneously connected to the input terminal of the signal shaping processor, the signal shaping processing module outputs the processed pulse signal.
Preferably, in the latch signal circuit, after the magnetic latching relay sends the action command, the latch latches the action signal of the magnetic latching relay processed by the signal shaping processor, so that the latch continuously outputs the current action command information before the next action command of the magnetic latching relay arrives.
Preferably, in the latch signal circuit, the latch signal is processed by an inverter and then output to the latch.
Preferably, in the control signal circuit, a pulse signal before processing is connected in parallel with a first capacitor, the other end of the first capacitor is grounded, and the other end of the first capacitor is connected with a signal input end of the signal shaping processor; the output end of the latch is connected with one end of the second capacitor in parallel, and the other end of the second capacitor is grounded.
Preferably, the input line of the command pulse signal of the magnetic latching relay is routed separately from the output line.
Preferably, the width of the power line is 1.3-2 mm.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the method of triggering latching and holding is adopted, so that the shaking or jumping of the relay caused by external reasons such as falling, vibration, impact and other severe environments is avoided, and the defect that the state of the relay cannot be automatically recovered due to the change is avoided.
Secondly, the invention avoids using other programming devices because the combined logic gate circuit is adopted to carry out the three-to-two operation of the relay state, thereby reducing the complexity of the circuit design, improving the reliability of the circuit and simultaneously reducing the design cost.
Thirdly, due to the fact that the design of two out of three is adopted, when the magnetic latching relay abnormally jumps or cannot act in the intermediate state, the correctness of the state of the relay can be ensured through two out of three, and the probability of the occurrence of the relay abnormity is greatly reduced after two out of three, so that the reliability of the magnetic latching relay is improved.
Fourthly, backup redundancy processing is carried out on the fault self-recovery magnetic latching relay circuit, and the relay is further ensured to be capable of carrying out quick and effective self-recovery, so that the adaptability and the reliability of the relay in a severe environment are improved.
Drawings
FIG. 1 is a schematic diagram of a magnetic latching relay jump self-recovery circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a two-out-of-three logic of the magnetic latching relay according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the invention provides a magnetic latching relay rebound self-recovery application circuit for aerospace, comprising: the magnetic latching relay drive circuit comprises a trigger signal circuit, a latching signal circuit, a control signal circuit and a three-in-two combination logic circuit, wherein,
the latch signal circuit is used for keeping the magnetic state of the magnetic latching relay;
the control signal circuit adopts a small-capacity capacitor to perform bypass processing on noise influencing a system signal, is used for performing anti-jitter filtering and performs magnetic interference suppression;
the three-out-of-two combinational logic circuit is used for judging the output state of the magnetic latching relay by the combinational logic; the three-out-of-two combinational logic circuit is connected with a plurality of magnetic latching electrical appliance circuits.
Further, the pulse signal before processing is connected with a first capacitor in parallel, one end of the first capacitor is grounded, and the other end of the first capacitor is connected with a Data port of the signal shaping processor; the trigger signal is connected with the non-inverting device and is connected with a Ctrl port of the signal shaping processor; the latch signal and the phase inverter are connected to the latch, the output port of the signal shaping processor is connected with the input end of the latch, the output end of the latch is connected with one end of the second capacitor in parallel, the other end of the second capacitor is grounded, and the processed pulse signal is output.
Further, in the trigger signal circuit, when the TRIG signal and the pulse signal before processing are respectively connected with the input end of the signal shaping processor at the same time, the signal shaping processing module outputs the processed pulse signal.
It will be understood by those skilled in the art that the TRIG control signal response is initiated simultaneously with the sending of an action, i.e. a change or holding of the existing state, command to the magnetic latching relay. The timing at which the control signal of the TRIG is applied to U4, i.e., the signal shaping processing block, is not later than the timing at which the pulse signal before processing is applied to U4. The signal shaping processing module outputs the processed pulse signal only when the TRIG signal and the pulse signal before processing are simultaneously applied to U4. This minimizes the effect of false pulses.
Furthermore, in the latch signal circuit, after the magnetic latching relay sends the action command, the latch latches the action signal of the magnetic latching relay processed by the signal shaping processor, so that the latch continuously outputs the current action command information before the next action command of the magnetic latching relay arrives.
Further, the latch signal is processed by the inverter and then output to the latch.
Those skilled in the art will appreciate that the latched signal OE is processed by U1 and then responds to U3.
Further, in the anti-jitter filter circuit, a pulse signal before processing is connected in parallel with a first capacitor, the other end of the first capacitor is grounded, and the other end of the first capacitor is connected with a signal input end of the signal shaping processor; the output end of the latch is connected with one end of the second capacitor in parallel, and the other end of the second capacitor is grounded.
As can be understood by those skilled in the art, before the pulse signal before processing is applied to the U4, a small-capacity capacitor C1 is connected in parallel, so that one end of the capacitor C1 is grounded, and the other end is connected to the signal input end of the U4, namely the Data end in FIG. 1. As shown in fig. 1, a small capacitance C2 is connected in parallel with the output terminal of the latch U3, such that one end of the capacitance C2 is grounded and the other end is connected to the output terminal of the U3.
Furthermore, an input line and an output line of the command pulse signal of the magnetic latching relay are separately wired, so that the reduction of high-frequency attenuation of the filter caused by coupling between the input line and the output line is avoided; the width of the power line is 1.3-2 mm, so that the loop resistance is reduced, and the power wiring direction and the signal transmission direction are kept consistent to enhance the anti-noise performance; the power line and the signal line are separated, and the signal line is ensured to have a nearest loop path.
Based on the above embodiment, the invention provides a magnetic latching relay rebound self-recovery application circuit for aerospace, which comprises the following steps:
step 1: and preparing a high-quality-grade microminiature magnetic latching relay of an aerospace standard, wherein other driving circuit components are selected as aerospace high-quality-grade components.
Step 2: the pulse signal before processing is connected in parallel with a small-capacity capacitor C1, and one end of the capacitor C1 is grounded and is connected with U4, namely the signal input end of the signal shaping processor, namely the Data end in fig. 1.
And step 3: the TRIG signal is connected to the Ctrl port of U4 through U2, where the TRIG signal is derived from the pulse signal before processing, but arrives at U4 earlier than the pulse signal before processing.
And 4, step 4: the pre-processed pulse signal is processed by the signal shaping processor U4, and then is Output to the latch U3 through the Output port Output.
And 5: the latch signal of the latch is coupled through inverter U1 to latch U3, which controls the latch state of the latch, where the OE signal is also derived from the pre-processed pulse signal.
Step 6: the output signal of latch U3 is connected in parallel with a capacitor C2, such that one end of C2 is connected to the output of latch U3 and the other end is connected to the main ground plane of the system.
And 7: the processed pulse signal directly acts on the magnetic latching relay 1, the magnetic latching relay 2 and the magnetic latching relay 3. Then, the states of the magnetic latching relay 1, the magnetic latching relay 2, and the magnetic latching relay 3 are subjected to an operation of taking two out of three by the combinational logic circuit shown in fig. 2, and the result is output to the final determination response terminal.
As can be understood by those skilled in the art, the method adopted in the embodiment of the invention uses aerospace standard high-quality grade components and aerospace standard subminiature magnetic latching relays to design the driving circuit according to the technical requirements of reliability and stability of an aerospace electronic system. A relay trigger control circuit is introduced, and when a state instruction signal of the relay is sent, a signal TRIG is triggered at the same time to control a signal processing module to respond, so that abnormal signal interference is avoided; a relay latching state circuit is introduced to latch the instruction signal for changing the state of the magnetic latching relay, and when the instruction pulse disappears, a magnetic induction coil in the magnetic latching relay still has certain current to keep the magnetic state of the magnetic latching relay; the control signal of the magnetic latching relay is subjected to anti-jitter filtering, noise influencing a system signal is subjected to bypass processing by adopting a small-capacity capacitor, and peak abnormal pulses are absorbed and converted by utilizing the charge-discharge characteristic of the energy storage of the small capacitor. Meanwhile, due to the electromagnetic field interference characteristic of the relay, the electromagnetic interference of the magnetic latching relay is inhibited by adopting a PCB processing mode of increasing the wire diameter of a power line, separately routing an input wire and an output wire, reducing loop resistance and separately routing the power line and a signal wire; the magnetic latching relays are backed up, three groups of magnetic latching relays in the same state, the same manufacturer and the same batch are connected in parallel, and judgment of two out of three is carried out through combinational logic, so that the reliability of the relays is improved. The present invention has not been described in detail, partly as is known to the person skilled in the art.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A magnetic latching relay rebound self-recovery application circuit for aerospace is characterized by comprising:
a latch signal circuit for holding a magnetic state of the magnetic latching relay;
the control signal circuit adopts a small-capacity capacitor to perform bypass processing on noise influencing a system signal, is used for performing anti-jitter filtering and performs magnetic interference suppression;
the three-out-of-two combination logic circuit is used for judging the output state of the magnetic latching relay by combining logic; the three-out-of-two combinational logic circuit is connected with a plurality of magnetic latching electrical appliance circuits.
2. The magnetic latching relay rebound self-recovery application circuit for aerospace according to claim 1, wherein the pulse signal before processing is connected in parallel with a first capacitor, and one end of the first capacitor is grounded, and the other end is connected with a signal input port of a signal shaping processor; the trigger signal is connected with the non-inverting device and is connected with a signal control port of the signal shaping processor; the latch signal and the phase inverter are connected to the latch, the output port of the signal shaping processor is connected with the input end of the latch, the output end of the latch is connected with one end of the second capacitor in parallel, the other end of the second capacitor is grounded, and the processed pulse signal is output.
3. The magnetic latching relay rebound self-recovery application circuit for aerospace use of claim 1, wherein in the trigger signal circuit, when the TRIG signal and the pulse signal before processing are respectively connected to the input terminal of the signal shaping processor at the same time, the signal shaping processing module outputs the processed pulse signal.
4. The magnetic latching relay rebound self-recovery application circuit for aerospace of claim 1, wherein in the latch signal circuit, after the magnetic latching relay sends the action command, the latch latches the magnetic latching relay action signal processed by the signal shaping processor, so that the latch continuously outputs the current action command information before the next action command of the magnetic latching relay arrives.
5. The magnetic latching relay rebound self-recovery application circuit for aerospace of claim 4, wherein in the latch signal circuit, the latch signal is processed by the inverter and then output to the latch.
6. The magnetic latching relay rebound self-recovery application circuit for aerospace according to claim 1, wherein in the control signal circuit, a pulse signal before processing is connected in parallel with a first capacitor, the other end of the first capacitor is grounded, and the other end of the first capacitor is connected to a signal input terminal of the signal shaping processor; the output end of the latch is connected with one end of the second capacitor in parallel, and the other end of the second capacitor is grounded.
7. The magnetic latching relay rebound self-recovery application circuit for aerospace of claim 1, wherein an input line of the command pulse signal of the magnetic latching relay is routed separately from an output line.
8. The magnetic latching relay rebound self-recovery application circuit for aerospace of claim 1, wherein the width of the power line is between 1.3 and 2 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210126534.3A CN114551153A (en) | 2022-02-10 | 2022-02-10 | Magnetic latching relay rebound self-recovery application circuit for aerospace |
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| CN202210126534.3A CN114551153A (en) | 2022-02-10 | 2022-02-10 | Magnetic latching relay rebound self-recovery application circuit for aerospace |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899438A (en) * | 2014-04-16 | 2014-07-02 | 上海航天电子通讯设备研究所 | Two-of-three ignition device for carrier rocket |
| CN113251873A (en) * | 2021-03-23 | 2021-08-13 | 上海宇航系统工程研究所 | Triple-redundancy control system for initiating explosive devices of carrier rocket |
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2022
- 2022-02-10 CN CN202210126534.3A patent/CN114551153A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899438A (en) * | 2014-04-16 | 2014-07-02 | 上海航天电子通讯设备研究所 | Two-of-three ignition device for carrier rocket |
| CN113251873A (en) * | 2021-03-23 | 2021-08-13 | 上海宇航系统工程研究所 | Triple-redundancy control system for initiating explosive devices of carrier rocket |
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