Time sequence control circuit, safety detection method thereof and rocket launch system
By designing a timing control circuit in the rocket launch system, and utilizing the power supply module and monitoring module to monitor the protection resistor in real time when the switch is off, the problem of the inability to test and monitor the timing control of pyrotechnics in advance is solved, thus improving the safety of the rocket launch system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING GALAXY POWER EQUIP TECH CO LTD
- Filing Date
- 2023-07-27
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the timing control fault monitoring of rocket-launched pyrotechnics cannot be tested in advance or monitored in real time, which poses certain risks.
Design a timing control circuit, including a power supply module, a control module, and a monitoring module. By monitoring the electrical signal of the protection resistor when the power bus switch is open, the operating status of the control module can be detected in real time, and the current can be limited to prevent explosion in case of accidental activation.
It enables safe detection of timing control circuits without closing the power bus switch, improving safety performance. It can monitor and prevent explosions caused by accidental engagement in real time, thus enhancing the safety of rocket launch systems.
Smart Images
Figure CN117055384B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rocket launch technology, and more specifically, to a timing control circuit, its safety detection method, and a rocket launch system. Background Technology
[0002] Igniters, detonators, non-electric detonation systems, explosive bolts, and separation devices are all classified as pyrotechnics, essential components for generating propulsion during rocket launch. Timing control is crucial for pyrotechnics; problems with timing control can lead to serious hazards.
[0003] To ensure the safety of timing control, existing technologies typically employ the setting of timing control fault test items. However, this test item not only requires an additional test procedure, but can also only be tested after the timing bus switch is closed, making it impossible to test in advance or monitor in real time, thus still posing certain risks. Summary of the Invention
[0004] This application addresses the shortcomings of existing methods by proposing a timing control circuit, its safety detection method, and a rocket launch system. This solution aims to address the technical problem that in the prior art, timing control fault monitoring of rocket-launched pyrotechnics cannot be tested in advance or monitored in real time, thus leaving certain risks in the timing control of pyrotechnics.
[0005] In a first aspect, embodiments of this application provide a timing control circuit, including:
[0006] The power module includes a power supply, a first power bus with a first switch and a second power bus with a second switch, which are electrically connected to the power supply.
[0007] The control module includes multiple timing control relays, each of which is electrically connected to the first power bus, the second power bus, and a timing load. The timing load performs a corresponding action when the timing control relay is energized and the current supplied to the timing load is greater than or equal to the safe current.
[0008] The monitoring module includes a first protective resistor connected in parallel across the first switch, a second protective resistor connected in parallel across the second switch, and a monitor. The monitor is used to monitor the electrical signals across the first and / or second protective resistors during the safety detection process, and to determine whether the control module is in normal working condition based on the electrical signals. During the safety detection process, both the first and second switches are open, and the first and second protective resistors ensure that when the timing control relay accidentally engages during the safety detection process, the current supplied to the timing load is less than the safe current.
[0009] Optionally, the resistance value of the first protective resistor is equal to the resistance value of the second protective resistor.
[0010] Optionally, when the monitor is used to monitor the electrical signal across the first protective resistor, the monitoring module further includes a third protective resistor and a fourth protective resistor. The third protective resistor is electrically connected to one end of the first protective resistor and the monitor, and the fourth protective resistor is electrically connected to the other end of the first protective resistor and the monitor; and / or
[0011] When the monitor is used to monitor the electrical signals across the second protection resistor, the monitoring module further includes a fifth protection resistor and a sixth protection resistor. The fifth protection resistor is electrically connected to one end of the second protection resistor and the monitor, and the sixth protection resistor is electrically connected to the other end of the second protection resistor and the monitor.
[0012] Optionally, the voltage difference between the first power bus and the second power bus is 30V; the first protection resistor is 15kΩ; the second protection resistor is 15kΩ; the third protection resistor is 10kΩ; the fourth protection resistor is 10kΩ; the fifth protection resistor is 10kΩ; and the sixth protection resistor is 10kΩ.
[0013] Optionally, the timing control circuit further includes: a controller, which is electrically connected to the first switch, the second switch, and each of the timing control relays, and is configured to provide a first switch signal to the first switch to control whether the first switch is turned on, provide a second switch signal to the second switch to control whether the second switch is turned on, and provide a timing control signal to each of the timing control relays to control whether each of the timing control relays is engaged.
[0014] Optionally, the monitor is specifically configured to collect the voltage across the first protective resistor and / or the second protective resistor in real time, and determine whether the control module is in normal working condition based on the collected voltage across the first protective resistor and / or the second protective resistor.
[0015] Secondly, embodiments of this application provide a rocket launch system, including the aforementioned timing control circuit, wherein the timing load is a pyrotechnic product.
[0016] Thirdly, embodiments of this application provide a security detection method for a timing control circuit, which monitors the control module in the aforementioned timing control circuit. The security detection method includes:
[0017] Start the power supply to power on the first power bus and the second power bus, and control the first switch, the second switch and each timing control relay to be in the off state;
[0018] Collect the electrical signals across the first and / or second protective resistors;
[0019] The control module is determined to be in normal working condition based on the collected electrical signals across the first and / or second protection resistors.
[0020] If the control module is in normal working condition, it controls the first switch and the second switch to close, and controls each of the timing control relays to engage according to a preset timing sequence;
[0021] If the control module is in an abnormal working state, troubleshooting should be performed on the control module.
[0022] Optionally, the electrical signals across the first protective resistor and / or the second protective resistor are acquired, including: real-time acquisition of the voltage across the first protective resistor and / or the second protective resistor.
[0023] Optionally, determining whether the control module is in normal working condition based on the collected electrical signals across the first and / or second protection resistors includes:
[0024] If only the voltage across the first protective resistor is collected, and the collected voltage across the first protective resistor is 0V, then it is determined that all the timing control relays are in the closed state, and the control module is in normal working state; otherwise, the control module is in abnormal working state.
[0025] If only the voltage across the second protective resistor is collected, and the collected voltage across the second protective resistor is 0V, then it is determined that all the timing control relays are in the closed state, and the control module is in normal working state; otherwise, the control module is in abnormal working state.
[0026] If the voltage across the first and second protective resistors is measured, and both voltages are 0V, then it is determined that all the timing control relays are in a closed state, and the control module is in normal working condition. Otherwise, the control module is in an abnormal working state.
[0027] The beneficial technical effects of the technical solutions provided in this application include:
[0028] The timing control circuit, its safety detection method, and rocket launch system provided in this application embodiment can perform safety detection on the control module when the first and second switches on the power bus are open. Compared with the prior art, which requires the first and second switches to be closed for safety detection, the safety performance is higher. Furthermore, it can monitor the electrical signals across the first and / or second protection resistors in real time during the safety detection process, thus providing better monitoring results. At the same time, even if the timing control relay is mistakenly activated during the safety detection process (the control module is in an abnormal working state), the current supplied to the timing load is less than the safe current, and the timing load will not take action. For example, if the timing load is a pyrotechnic device, an explosion will not occur even if the timing control relay is mistakenly activated during the safety detection process, thereby improving the safety performance of the timing control circuit.
[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description
[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:
[0031] Figure 1 This is a schematic diagram of the structure of the first timing control circuit provided in the embodiments of this application;
[0032] Figure 2 This is a schematic diagram of the structure of a second timing control circuit provided in an embodiment of this application;
[0033] Figure 3 This is a schematic diagram of the structure of the third timing control circuit provided in the embodiments of this application;
[0034] Figure 4This is a schematic diagram of the structure of the fourth timing control circuit provided in the embodiments of this application;
[0035] Figure 5 This is a schematic diagram of the structure of the fifth timing control circuit provided in the embodiments of this application;
[0036] Figure 6 This is a schematic diagram of the sixth timing control circuit provided in the embodiments of this application;
[0037] Figure 7 A schematic diagram of the structure of the seventh timing control circuit provided in the embodiments of this application;
[0038] Figure 8 A schematic diagram of the framework of a rocket launch system provided in this application embodiment;
[0039] Figure 9 This is a flowchart illustrating another security detection method for timing control circuits provided in an embodiment of this application.
[0040] Figure label:
[0041] 10 - Power module; U - Power supply; L1 - First power bus; K1 - First switch; L2 - Second power bus; K2 - Second switch;
[0042] 20 - Control module; KA1~KAn - Timing control relays;
[0043] 30 - Monitoring module; 301 - Monitor; R1 - First protection resistor; R2 - Second protection resistor; R3 - Third protection resistor; R4 - Fourth protection resistor; R5 - Fifth protection resistor; R6 - Sixth protection resistor;
[0044] 40 - Load modules; P1~Pn - Sequential loads;
[0045] 50-Controller;
[0046] 100 - Timing control circuit; 1000 - Rocket launch system. Detailed Implementation
[0047] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.
[0048] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude implementations of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by this art. It should be understood that when we say an element is “connected” or “coupled” to another element, the element may be directly connected or coupled to the other element, or it may mean that the element and the other element are connected through an intermediate element. Furthermore, “connected” or “coupled” as used herein may include wireless connection or wireless coupling. The term “and / or” as used herein means at least one of the items defined by the term; for example, “A and / or B” may be implemented as “A,” or as “B,” or as “A and B.”
[0049] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0050] Pyrotechnic devices are essential for generating power during rocket launch, and timing control is crucial for them; problems with timing control can lead to serious hazards. To ensure the safety of timing control, existing technologies typically employ timing control fault tests to rule out erroneous activation of timing control relays. However, this test not only requires an additional testing procedure but can also only be performed after the timing bus switch is closed, making pre-testing and real-time monitoring impossible, thus still posing certain risks.
[0051] The timing control circuit, its safety detection method, and rocket launch system provided in this application are intended to solve the above-mentioned technical problems of the prior art.
[0052] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.
[0053] like Figures 1 to 6 As shown, this embodiment provides a timing control circuit for controlling a timing load. The timing control circuit provided in this embodiment includes a power supply module 10, a control module 20, and a monitoring module 30.
[0054] The power module 10 includes a power supply U, a first power bus L1 with a first switch K1 and a second power bus L2 with a second switch K2, which are electrically connected to the power supply U.
[0055] Control module 20 includes multiple timing control relays, each of which is electrically connected to the first power bus L1, the second power bus L2, and the timing load, respectively. Specifically, Figures 1 to 6 In the timing control circuit shown, there are n timing control relays in the control module 20, namely, timing control relays KA1 to Kaan; this is because the timing control circuit needs to control n timing loads, namely, timing loads P1 to Pn.
[0056] The monitoring module 30 includes a first protective resistor R1 connected in parallel across the first switch K1, a second protective resistor R2 connected in parallel across the second switch K2, and a monitor 301. The monitor 301 is used to monitor the electrical signals across the first protective resistor R1 and / or the second protective resistor R2 during the safety detection process, and to determine whether the control module 20 is in normal working condition based on the electrical signals. During the safety detection process, both the first switch K1 and the second switch K2 are open. The first protective resistor R1 and the second protective resistor R2 ensure that when the timing control relay is accidentally activated during the safety detection process, the current supplied to the timing load is less than the safe current.
[0057] It should be noted that the control module 20 and the timing load are both located after the first switch K1 and the second switch K2, so that the power supply to the control module 20 is controlled by the closing or opening of the first switch K1 and the second switch K2.
[0058] The monitoring module 30 in the timing control circuit provided in this embodiment, by setting protective resistors in parallel across the two ends of the two switches, can monitor the electrical signals across the first protective resistor R1 and / or the second protective resistor R2 in real time during the safety detection process, thus achieving better monitoring results. Furthermore, it can perform safety detection on the control module 20 even when the first switch K1 and the second switch K2 on the power bus are open, which is safer than the prior art where the first switch K1 and the second switch K2 need to be closed for safety detection. Simultaneously, even if the timing control relay is mistakenly activated during the safety detection process (the control module 20 is in an abnormal operating state), the current supplied to the timing load is less than the safe current due to the setting of the first and second protective resistors R1 and R2, preventing the timing load from operating. For example, if the timing load is a pyrotechnic device, an explosion will not occur even if the timing control relay is mistakenly activated during the safety detection process, thereby improving the safety performance of the timing control circuit.
[0059] Optionally, in the timing control circuit provided in this embodiment, the first protection resistor R1 and the second protection resistor R2 have the same resistance value. This provides a better protection effect.
[0060] Optionally, in the timing control circuit provided in this embodiment, when the monitor 301 is used to monitor the electrical signal across the first protective resistor R1, the monitoring module 30 further includes a third protective resistor R3 and a fourth protective resistor R4. The third protective resistor R3 is electrically connected to one end of the first protective resistor R1 and the monitor 301, and the fourth protective resistor R4 is electrically connected to the other end of the first protective resistor R1 and the monitor 301. Setting the third protective resistor R3 and the fourth protective resistor R4 can prevent excessive current flowing into the monitor 301, thus providing protection and monitoring. The function of the monitor 301; and / or when the monitor 301 is used to monitor the electrical signal across the second protective resistor R2, the monitoring module 30 further includes a fifth protective resistor R5 and a sixth protective resistor R6. The fifth protective resistor R5 is electrically connected to one end of the second protective resistor R2 and the monitor 301, and the sixth protective resistor R6 is electrically connected to the other end of the second protective resistor R2 and the monitor 301. Setting the fifth protective resistor R5 and the sixth protective resistor R6 can prevent the current flowing into the monitor 301 from being too large, thus protecting the monitor 301.
[0061] Based on various scenarios involving monitoring the first protection resistor R1 and / or the second protection resistor R2, as well as whether to set the third protection resistor R3 and the fourth protection resistor R4, and whether to set the fifth protection resistor R5 and the sixth protection resistor R6, the timing control circuit provided in this embodiment has a variety of different scenarios, which will be described in detail below.
[0062] In the first optional embodiment, such as Figure 1 As shown, the monitor 301 is only used to monitor the electrical signal across the first protection resistor R1.
[0063] In a second alternative embodiment, such as Figure 2 As shown, the monitor 301 is only used to monitor the electrical signal across the second protection resistor R2.
[0064] In a third alternative embodiment, such as Figure 3As shown, the monitor 301 is used to monitor the electrical signals across the first protective resistor R1 and the second protective resistor R2. By monitoring the electrical signals across both the first and second protective resistors R1 and R2, if the resistance values of the first and second protective resistors R1 and R2 are the same, and the monitor 301 detects a difference between the signals across the first and second protective resistors R1 and R2, it can be determined that either the first or second protective resistor R1 has failed. Therefore, it can promptly detect whether the first or second protective resistor R1 has failed, improving the accuracy of safety detection results.
[0065] In a fourth alternative embodiment, such as Figure 4 As shown, the monitor 301 is only used to monitor the electrical signal across the first protective resistor R1. The monitoring module 30 also includes a third protective resistor R3 and a fourth protective resistor R4. The third protective resistor R3 is electrically connected to one end of the first protective resistor R1 and the monitor 301, and the fourth protective resistor R4 is electrically connected to the other end of the first protective resistor R1 and the monitor 301. The third protective resistor R3 and the fourth protective resistor R4 can prevent excessive current from flowing into the monitor 301 when the first protective resistor R1 fails, thus protecting the monitor 301.
[0066] In a fifth alternative embodiment, such as Figure 5 As shown, the monitor 301 is only used to monitor the electrical signal across the second protective resistor R2. The monitoring module 30 also includes a fifth protective resistor R5 and a sixth protective resistor R6. The fifth protective resistor R5 is electrically connected to one end of the second protective resistor R2 and the monitor 301, and the sixth protective resistor R6 is electrically connected to the other end of the second protective resistor R2 and the monitor 301. The fifth protective resistor R5 and the sixth protective resistor R6 can prevent excessive current from flowing into the monitor 301 when the second protective resistor R2 fails, thus protecting the monitor 301.
[0067] In the sixth alternative embodiment, such as Figure 6As shown, the monitor 301 is used to monitor the electrical signals across the first protective resistor R1 and the second protective resistor R2. The monitoring module 30 also includes a third protective resistor R3, a fourth protective resistor R4, a fifth protective resistor R5, and a sixth protective resistor R6. The third protective resistor R3 is electrically connected to one end of the first protective resistor R1 and the monitor 301. The fourth protective resistor R4 is electrically connected to the other end of the first protective resistor R1 and the monitor 301. The fifth protective resistor R5 is electrically connected to one end of the second protective resistor R2 and the monitor 301. The sixth protective resistor R6 is electrically connected to the other end of the second protective resistor R2 and the monitor 301. The third, fourth, fifth, and sixth protective resistors R3, R4, R5, and R6 can prevent excessive current from flowing into the monitor 301, thus protecting the monitor 301.
[0068] Specifically, such as Figures 1 to 6 As shown, in the timing control circuit provided in this embodiment, the monitor 301 is specifically configured to collect the voltage across the first protection resistor R1 and / or the second protection resistor R2 in real time, and determine whether the control module 20 is in normal working condition based on the collected voltage across the first protection resistor R1 and / or the second protection resistor R2.
[0069] like Figures 1 to 6 As shown, the power supply U has a voltage of 20V to 30V, the first protection resistor R1 is 15kΩ, and the second protection resistor R2 is 15kΩ. Taking a pyrotechnic device as the sequential load, the safe current is typically about 50mA. Using the voltage difference of 30V and both the first and second protection resistors R1 and R2 being 15kΩ, if the sequential control relay malfunctions and closes, the circuit current (the current supplied to the pyrotechnic device) is approximately 10mA. Even if either the first protection resistor R1 or the second protection resistor R2 fails, the circuit current is approximately 20mA, both less than the safe current of the pyrotechnic device, thus ensuring its safety.
[0070] like Figures 4 to 6 As shown, the third protection resistor R3 is 10kΩ; the fourth protection resistor R4 is 10kΩ; the fifth protection resistor R5 is 10kΩ; and the sixth protection resistor R6 is 10kΩ.
[0071] like Figure 7 As shown, the timing control circuit provided in this embodiment also includes a controller 50. The controller 50 is electrically connected to the first switch K1, the second switch K2 and each timing control relay, and is configured to provide a first switch K1 signal to the first switch K1 to control whether the first switch K1 is turned on, provide a second switch K2 signal to the second switch K2 to control whether the second switch K2 is turned on, and provide timing control signals to each timing control relay to control whether each timing control relay is engaged.
[0072] Specifically, the controller 50 can be a field-programmable gate array (FPGA).
[0073] Based on the same inventive concept, embodiments of this application also provide a rocket launch system, such as... Figure 8 As shown, the rocket launch system 1000 provided in this embodiment includes any of the timing control circuits 100 in the above embodiments, and has the beneficial effects of the timing control circuits 100 in the above embodiments, which will not be described again here.
[0074] like Figure 8 As shown, the rocket launch system 1000 provided in this embodiment also includes timing loads P1 to Pn, which are specifically pyrotechnics.
[0075] like Figure 8 As shown, in the rocket launch system 1000 provided in this embodiment, the pyrotechnics (timing loads P1 to Pn) and the control module 20 in the timing control circuit 100 are located at the rocket end, while the monitor 301 in the timing control circuit 100 is located at the ground end, so that the staff can stay away from the danger (pyrotechnics) during the safety inspection process.
[0076] Based on the same inventive concept, this application also provides a security detection method for a timing control circuit, used to monitor the control module 20 in the timing control circuit of the above embodiment, such as... Figure 1-6 as well as Figure 9 As shown, the security detection method provided in this embodiment includes:
[0077] S1: Start the power supply, power on the first power bus L1 and the second power bus L2, and control the first switch K1, the second switch K2 and each timing control relay to be in the open state.
[0078] S2: Collect the electrical signals across the first protective resistor R1 and / or the second protective resistor R2.
[0079] S3: Determine whether the control module 20 is in normal working condition based on the electrical signals collected across the first protection resistor R1 and / or the second protection resistor R2.
[0080] S4: If the control module 20 is in normal working condition, it controls the first switch K1 and the second switch K2 to close, and controls each timing control relay to engage according to the preset timing sequence.
[0081] S5: If the control module 20 is in an abnormal working state, troubleshoot the control module 20.
[0082] It should be noted that troubleshooting the control module 20 mainly involves confirming whether any timing control relays have malfunctioned. If malfunction occurs, they should be reset or replaced to eliminate the possibility of malfunction. Furthermore, after troubleshooting, a safety test should be performed again until the test results confirm that the control module 20 is in normal working condition.
[0083] The safety detection method provided in this embodiment can perform safety detection on the control module 20 when the first switch K1 and the second switch K2 on the power bus are open. Compared with the existing technology, which requires the first switch K1 and the second switch K2 to be closed for safety detection, the safety performance is higher. Furthermore, it can monitor the electrical signals across the first protection resistor R1 and / or the second protection resistor R2 in real time during the safety detection process, thus improving the monitoring effect. At the same time, even if the timing control relay is mistakenly activated during the safety detection process (the control module 20 is in an abnormal working state), if the current supplied to the timing load is less than the safe current, the timing load will not take action. For example, if the timing load is a pyrotechnic product, an explosion will not occur even if the timing control relay is mistakenly activated during the safety detection process, thereby improving the safety performance of the timing control circuit.
[0084] Optionally, in the safety detection method provided in this embodiment, step S2 includes: real-time acquisition of the voltage across the first protective resistor R1 and / or the second protective resistor R2. By acquiring the voltage across the first protective resistor R1 and / or the second protective resistor R2, not only is the structure of the monitor 301 simple, but the monitoring is also more convenient.
[0085] Optionally, in the security detection method provided in this embodiment, step S3 may vary depending on the type of electrical signal collected. Specifically:
[0086] Please refer to Figure 1 and Figure 4 If only the voltage across the first protective resistor R1 is collected, then step S3 includes: if the collected voltage across the first protective resistor R1 is 0V, then it is determined that all timing control relays are in the closed state, and the control module 20 is in normal working state at this time; otherwise, the control module 20 is in abnormal working state.
[0087] Please refer to Figure 2 and Figure 5 If only the voltage across the second protection resistor R2 is collected, then step S3 includes: if the collected voltage across the second protection resistor R2 is 0V, then it is determined that all timing control relays are in the closed state, and the control module 20 is in normal working state at this time; otherwise, the control module 20 is in abnormal working state.
[0088] Please refer to Figure 3 and Figure 6If the voltage across the first protective resistor R1 and the second protective resistor R2 is collected, then step S3 includes: if the voltage across the first protective resistor R1 and the second protective resistor R2 is 0V, then it is determined that each timing control relay is in the closed state, and the control module 20 is in normal working state at this time; otherwise, the control module 20 is in abnormal working state.
[0089] by Figure 4 Taking the timing control circuit shown as an example, if the timing control relays do not malfunction during the safety detection process, then no current flows through the first protection resistor R1, meaning the voltage across the first protection resistor R1 is 0V. Based on this, it is determined that none of the timing control relays have malfunctioned, meaning the control module 20 is in normal working condition. If the timing control relays malfunction during the safety detection process, then current flows through the first protection resistor R1, and the voltage across the first protection resistor R1 is not zero. If the resistance values of the first protection resistor R1 and the second protection resistor R2 are equal, and the resistance is very small and negligible when the timing control relays malfunction, then the voltage across the first protection resistor R1 is approximately half the difference between the voltage on the first power bus L1 and the voltage on the second power bus L2.
[0090] Specifically, whether or not a third protection resistor R3 and a fourth protection resistor R4 are provided, and whether or not a fifth protection resistor R5 and a sixth protection resistor R6 are provided, does not affect the principle of the safety detection method provided in this embodiment. Therefore, please refer to... Figures 4 to 6 The principle of the safety detection method provided in this application embodiment is explained. If the voltage of the power supply U is 30V, and the first protective resistor R1 and the second protective resistor R2 are both 15kΩ, during the safety detection process, if accidental activation occurs, the circuit current will be approximately 30V / 30kΩ = 1mA. This circuit current is much smaller than the safe current of the pyrotechnic device (approximately 50mA), and the voltage across the first protective resistor R1 will be approximately 15V, thus determining that the control module 20 is in an abnormal operating state. If no accidental activation occurs, the voltage across the first protective resistor R1 and / or the second protective resistor R2 will be 0V, thus determining that the control module 20 is in a normal operating state.
[0091] For details, please refer to Figure 5If the power supply U is 30V, and both the first protective resistor R1 and the second protective resistor R2 are 15kΩ, during the safety detection process, if accidental activation occurs, the circuit current will be approximately 30V / 30kΩ = 1mA. This circuit current is much smaller than the safe current of the pyrotechnic device (approximately 50mA), and the voltage across the second protective resistor R2 will be approximately 15V. Therefore, it can be determined that the control module 20 is in an abnormal operating state. If no accidental activation occurs, the voltage across the second protective resistor R2 will be 0V, thus determining that the control module 20 is in a normal operating state.
[0092] For details, please refer to Figure 6 If the power supply U is 30V, and both the first protective resistor R1 and the second protective resistor R2 are 15kΩ, during the safety detection process, if accidental activation occurs, the circuit current will be approximately 30V / 30kΩ = 1mA. This circuit current is much smaller than the safe current of the pyrotechnic device (approximately 50mA), and the voltage across both the first and second protective resistors R1 and R2 will be approximately 15V. Therefore, it can be determined that the control module 20 is in an abnormal operating state. If no accidental activation occurs, the voltage across both the first and second protective resistors R1 and R2 will be 0V, thus determining that the control module 20 is in a normal operating state. Furthermore, if the first protective resistor R1 is damaged and short-circuited, the voltage across the first protective resistor R1 will be 0V, but the voltage across the second protective resistor R2 will be 30V. This indicates that not only has the timing control relay in the control module 20 malfunctioned, but also that the first protective resistor R1 has failed. This allows for timely replacement of the first protective resistor R1 and timely troubleshooting of the control module 20.
[0093] By applying the embodiments of this application, at least the following beneficial effects can be achieved:
[0094] 1) The timing control circuit, its safety detection method, and rocket launch system provided in this application embodiment can perform safety detection on the control module when the first and second switches on the power bus are open. Compared with the prior art, which requires the first and second switches to be closed for safety detection, the safety performance is higher. Furthermore, it can monitor the electrical signals across the first and / or second protection resistors in real time during the safety detection process, thus achieving better monitoring results. At the same time, even if the timing control relay is mistakenly activated during the safety detection process (the control module is in an abnormal working state), if the current supplied to the timing load is less than the safe current, the timing load will not take action. For example, if the timing load is a pyrotechnic product, an explosion will not occur even if the timing control relay is mistakenly activated during the safety detection process, thereby improving the safety performance of the timing control circuit.
[0095] 2) The timing control circuit, its safety detection method, and rocket launch system provided in this application embodiment include a third protection resistor and a fourth protection resistor, and / or a fifth protection resistor and a sixth protection resistor, so that the current flowing to the monitor is small when the control module sends a fault, thereby protecting the monitor.
[0096] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.
[0097] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0098] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown sequentially according to the arrows, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application, the steps in each process can be executed in other orders as required. Moreover, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on the actual implementation scenario. Some or all of these sub-steps or stages may be executed at the same time or at different times. In scenarios where the execution times are different, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application does not limit this.
[0099] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.
Claims
1. A timing control circuit, characterized by comprising: include: The power module includes a power supply, a first power bus with a first switch and a second power bus with a second switch, which are electrically connected to the power supply. The control module includes multiple timing control relays, each of which is electrically connected to the first power bus, the second power bus, and a timing load. The timing load performs a corresponding action when the timing control relay is energized and the current supplied to the timing load is greater than or equal to the safe current. The monitoring module includes a first protective resistor connected in parallel across the first switch, a second protective resistor connected in parallel across the second switch, and a monitor. The monitor is used to monitor the electrical signals across the first and / or second protective resistors during the safety detection process, and to determine whether the control module is in normal working condition based on the electrical signals. During the safety detection process, both the first and second switches are open, and the first and second protective resistors ensure that when the timing control relay accidentally engages during the safety detection process, the current supplied to the timing load is less than the safe current.
2. The timing control circuit of claim 1, wherein, The resistance value of the first protective resistor is equal to the resistance value of the second protective resistor.
3. The timing control circuit according to claim 2, characterized in that, When the monitor is used to monitor the electrical signal across the first protective resistor, the monitoring module further includes a third protective resistor and a fourth protective resistor. The third protective resistor is electrically connected to one end of the first protective resistor and the monitor, and the fourth protective resistor is electrically connected to the other end of the first protective resistor and the monitor. and / or When the monitor is used to monitor the electrical signals across the second protection resistor, the monitoring module further includes a fifth protection resistor and a sixth protection resistor. The fifth protection resistor is electrically connected to one end of the second protection resistor and the monitor, and the sixth protection resistor is electrically connected to the other end of the second protection resistor and the monitor.
4. The timing control circuit according to claim 3, characterized in that, The voltage difference between the first power bus and the second power bus is 30V; The first protection resistor is 15kΩ; the second protection resistor is 15kΩ; The third protection resistor is 10kΩ; the fourth protection resistor is 10kΩ; The fifth protection resistor is 10kΩ; the sixth protection resistor is 10kΩ.
5. The method of any one of claims 1-4, wherein the method further comprises administering to the subject an effective amount of a second therapeutic agent.
4. The timing control circuit of any one of claims 1-3, wherein the timing control circuit is configured to: The timing control circuit further includes: The controller is electrically connected to the first switch, the second switch, and each of the timing control relays, and is configured to provide a first switch signal to the first switch to control whether the first switch is turned on, provide a second switch signal to the second switch to control whether the second switch is turned on, and provide timing control signals to each of the timing control relays to control whether each of the timing control relays is engaged.
6. The timing control circuit according to claim 5, characterized in that, The monitor is specifically configured to collect the voltage across the first protective resistor and / or the second protective resistor in real time, and determine whether the control module is in normal working condition based on the collected voltage across the first protective resistor and / or the second protective resistor.
7. A rocket launch system characterized by, Including claim 1 The timing control circuit according to any one of the 6, wherein the timing load is a pyrotechnic product.
8. A safety detection method of a timing control circuit, the timing control circuit being any one of the timing control circuits of claims 1 6, the method comprising monitoring the control module of the timing control circuit, wherein The security detection method includes: Start the power supply to power on the first power bus and the second power bus, and control the first switch, the second switch and each timing control relay to be in the off state; Collect the electrical signals across the first and / or second protective resistors; The control module is determined to be in normal working condition based on the collected electrical signals across the first and / or second protection resistors. If the control module is in normal working condition, it controls the first switch and the second switch to close, and controls each of the timing control relays to engage according to a preset timing sequence; If the control module is in an abnormal working state, troubleshooting should be performed on the control module.
9. The security detection method of claim 8, wherein, Acquire the electrical signals across the first and / or second protective resistors, including: The voltage across the first protective resistor and / or the second protective resistor is collected in real time.
10. The security detection method according to claim 9, characterized in that, Determining whether the control module is in normal working condition based on the collected electrical signals across the first and / or second protection resistors includes: If only the voltage across the first protective resistor is collected, and the collected voltage across the first protective resistor is 0V, then it is determined that all the timing control relays are in the open state, and the control module is in normal working state; otherwise, the control module is in abnormal working state. If only the voltage across the second protective resistor is collected, and the collected voltage across the second protective resistor is 0V, then it is determined that all the timing control relays are in the open state, and the control module is in normal working state; otherwise, the control module is in abnormal working state. If the voltage across the first and second protective resistors is measured, and both voltages are 0V, then it is determined that all the timing control relays are in the open state, and the control module is in normal working condition. Otherwise, the control module is in abnormal working condition.