Power-off protection circuit for a gyroscopic orientation device
By designing a power-off protection circuit for the gyro orientation instrument and utilizing components such as a force detection module and a controller, the system ensures that the suspension wire is not subjected to force during power outages, thus solving the problem of damage caused by loose suspension wires and improving the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN CHANGHONG ELECTRONIC CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-04
AI Technical Summary
When the gyroscope is powered off, the suspension wire may not be locked by the locking device, causing the suspension wire to still be under stress. This may be difficult to detect and release in time, potentially leading to damage to the suspension wire.
Design a power failure protection circuit for a gyroscope orientation device, including a controller, a power supply module, a switch module, a force detection module, a power failure protection module, and a protection execution module. The force detection module detects whether the suspension wire is under force, and controls the power supply module and the protection execution module to perform actions when necessary, ensuring that the suspension wire is energized when under force and de-energized when not under force.
This achieves a dual guarantee: power is supplied when the suspension wire is under stress during a power outage, and power is cut off when the suspension wire is not under stress, thus improving the safety and reliability of the gyro orientation instrument.
Smart Images
Figure CN224596212U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gyroscope orientation technology, and in particular to a power failure protection circuit for a gyroscope orientation. Background Technology
[0002] The main function of a gyro-orientation instrument is to autonomously find north based on the principle of Earth's rotation. It does not rely on the Earth's magnetic field and is therefore unaffected by magnetic interference, providing a more accurate and reliable true north reference. Specifically, a gyro-orientation instrument uses a wire to suspend the sensitive part of a gyroscope to find true north. In operation, the wire suspends the sensitive part of the gyroscope and powers a high-speed motor inside. This motor drives the gyroscope rotor, which in turn rotates the sensitive part. Earth's rotation causes the rapidly rotating gyroscope to generate a small precession torque. Furthermore, the rotation of the sensitive part causes the wire to twist, generating a restoring torque. True north is determined by the restoring torque and the precession torque. Therefore, the wire is a very precise component of the gyro-orientation instrument, and it is crucial to ensure that the wire is not subjected to any force when the instrument is powered off.
[0003] The gyroguide is equipped with a locking device that locks the sensitive part of the gyroscope when the power is off, preventing stress on the suspension wire. However, in practice, sometimes the sensitive part of the gyroscope is not locked by the locking device and remains suspended on the suspension wire, causing the wire to continue to be stressed after the power is cut off. However, due to operator negligence, it is difficult to detect that the sensitive part of the gyroscope is not locked after a power outage. Furthermore, even if operators do notice this, the stress on the suspension wire cannot be relieved in time because the gyroguide has already been de-energized. Utility Model Content
[0004] This application provides a power failure protection circuit for a gyroscope orientation instrument to solve the technical problem mentioned in the background art where the sensitive part of the gyroscope is not locked by the locking device after a power failure, resulting in the suspension wire still being under force.
[0005] This application provides a power failure protection circuit for a gyro orientation instrument, applied to the gyro orientation instrument, which includes: a suspension wire, a gyro sensitive part, and a locking device. The power failure protection circuit of the gyro orientation instrument includes: a controller, a power supply module, a switch module, a force detection module, a power failure protection module, and a protection execution module. The switch module and the power failure protection module are both grounded and connected to the power supply module. The force detection module is connected to the first terminal of the controller and the power failure protection module. The second terminal of the controller is connected to the protection execution module. The power supply module is used to supply power to the gyroscope under the control of the switch module; The force detection module is used to detect whether the suspension wire is still under force when the switch module is disconnected and the gyroscope is de-energized, and output the force detection result to the power failure protection module and the controller. The power failure protection module is used to ensure that the power supply module supplies power to the gyroscope when the force detection result indicates that the sling is still under force, and to ensure that the power supply module is de-energized when the force detection result indicates that the sling is not under force. The controller is configured to receive the force detection result through the first terminal, and when the force detection result indicates that the sling is still under force, control the protection execution module to perform a preset action through the second terminal, so that the force detection result changes from indicating that the sling is still under force to indicating that the sling is not under force.
[0006] Optionally, the third terminal of the controller is connected between the switch module and ground; The controller is also used to monitor the switching state of the switching module through the third terminal and obtain the state detection result.
[0007] Optionally, the force detection module includes: a switch assembly and a logic AND gate, wherein the switch assembly is provided with multiple sets of independent limit switches, all of which are connected to the logic AND gate, and the logic AND gate is connected to the first end; The limit switch is used to obtain a positional relationship result by detecting the positional relationship between the locking device and the gyroscope sensitive part, and send the positional relationship result to the logic AND gate; The logical AND gate is used to perform a logical AND operation on multiple positional relationship results to obtain the force detection result.
[0008] Optionally, the power failure protection module includes: a first active switch, wherein the control terminal of the first active switch is connected to the force detection module and grounded, the input terminal is connected to the power supply module, and the output terminal is grounded; The first active switch is used to switch the switch state under the control of the force detection result.
[0009] Optionally, the power supply module includes: a power input terminal, a power output terminal, a second active switch, and a passive switch. The control terminal of the second active switch is connected to the passive switch and the output terminal of the first active switch. The input terminal is connected to the power input terminal, and the output terminal is connected to the power output terminal. The power output terminal is connected to the gyroscope. The passive switch is grounded.
[0010] Optionally, the first active switch is an NPN transistor.
[0011] Optionally, the second active switch is a P-type MOSFET. The power-off protection circuit for the gyroguide provided in this application comprises a controller, a power supply module, a switch module, a force detection module, a power-off protection module, and a protection execution module. The switch module and the power-off protection module are both grounded and connected to the power supply module. The force detection module is connected to the first terminal of the controller and the power-off protection module, and the second terminal of the controller is connected to the protection execution module. Thus, when the switch module controls the power supply module to disconnect, and when the force detection module detects that the suspension wire is still under force, the power-off protection module controls the power supply module to supply power to the suspension wire. The controller then controls the protection execution module to perform a preset action to remove the force from the suspension wire. When the suspension wire is no longer under force, the power-off protection module controls the power supply module to stop supplying power to the suspension wire, ensuring that the suspension wire is de-energized. This provides dual protection: the suspension wire is energized when under force and is not under force when disconnected, improving the safety of the gyroguide. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 A connection block diagram of the power failure protection circuit of a gyroscope orientation device provided in an embodiment of this application; Figure 2 A circuit diagram of a power-off protection circuit for a gyroscope orientation device provided in an embodiment of this application. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.
[0015] In use, a gyroscopic compass suspends the gyro's sensitive section in the air via a suspension wire, which supplies power to a high-speed motor inside the sensitive section. This causes the gyro rotor to rotate, driving the sensitive section to rotate as well. The rotation of the sensitive section, combined with the Earth's rotation, generates a precession torque. Simultaneously, the rotation of the sensitive section also causes the suspension wire to twist, generating a counter-elastic torque. This counter-elastic torque balances the precession torque generated by the Earth's rotation, thus determining true north.
[0016] Therefore, the suspension wire is the core component for determining true north. Since it needs to generate a reverse elastic torque, its design is based on the precise weight and moment of inertia of the gyroscope's sensitive component. The length and curvature of the suspension wire must be extremely precise. Therefore, the wire is only used to suspend the gyroscope's sensitive component, and it must not bear any force when power is off; a locking device is required to secure the gyroscope's sensitive component.
[0017] However, in practice, when the gyroscope is turned off after use, there are cases where the locking device fails to lock the sensitive part of the gyroscope. In addition, there are also cases where the staff is negligent, resulting in the suspension wire still hanging the sensitive part of the gyroscope. Over time, the suspension wire will be stretched and may even break, causing damage to the gyroscope.
[0018] Therefore, in order to solve the technical problems existing in the prior art, this application proposes a power failure protection circuit for a gyroscope orientation instrument. After the power supply module of the suspension wire is de-energized, the circuit controls whether the suspension wire is still energized after the power supply module is about to be de-energized by monitoring the force on the suspension wire. In other words, when the suspension wire is still under force, the circuit ensures that the suspension wire is still energized, and when the suspension wire is not under force, the circuit ensures that the suspension wire is de-energized, so as to avoid the suspension wire still being under force after the power failure.
[0019] The technical solution of this application will now be described with reference to specific embodiments: Figure 1 This is a connection block diagram of the power-off protection circuit of a gyroscope orientation instrument provided in one embodiment of this application. Figure 1 As shown, the power failure protection circuit of the gyroscope includes: a controller 110, a power supply module 120, a switch module 130, a force detection module 140, a power failure protection module 150, and a protection execution module 160. The switch module 130 and the power failure protection module 150 are both grounded and connected to the power supply module 120. The force detection module 140 is connected to the first terminal of the controller 110 and the power failure protection module 150. The second terminal of the controller 110 is connected to the protection execution module 160. The power supply module 120 is used to supply power to the gyroscope under the control of the switch module 130; The force detection module 140 is used to detect whether the suspension wire is still under force when the switch module 130 is disconnected and the gyro orientation device is powered off, and output the force detection result to the power failure protection module 150 and the controller 110. The power failure protection module 150 is used to ensure that the power supply module 120 supplies power to the gyro orientation instrument when the force detection result indicates that the sling is still under force, and to ensure that the power supply module 120 is de-energized when the force detection result indicates that the sling is not under force. The controller 110 is used to receive the force detection result through the first end, and when the force detection result indicates that the sling is still under force, it controls the protection execution module 160 through the second end to perform a preset action so that the force detection result changes from indicating that the sling is still under force to indicating that the sling is not under force.
[0020] In this embodiment, the locking device performs the action of locking or releasing the gyroscope sensitive part by driving the drive motor. When the wire is de-energized but still under force, it indicates that the locking device has not locked the gyroscope sensitive part. At this time, the locking device can be driven by the drive motor to lock the gyroscope sensitive part. Therefore, the protection execution module 160 can be the drive motor. Accordingly, executing the preset action is to drive the drive motor to make the locking device lock the gyroscope sensitive part.
[0021] In this design, the controller 110 can be a microcontroller unit (MCU), the power supply module 120 provides 24V DC power, and the switch module 130 controls the on / off state of the power supply module 120. When the switch module 130 is on, the power supply module 120 supplies 24V DC power to the gyroguide; when the switch module 130 is off, the gyroguide is powered off. In other words, in the prior art, the gyroguide can be powered on and off using only the power supply module 120 and the switch module 130.
[0022] To ensure that the suspension wire is not under stress after the switch module 130 is disconnected, and to ensure that the suspension wire is still energized even if the switch module 130 is disconnected but the suspension wire is still under stress, the working principle of this embodiment is as follows: When the gyroscope is in use, the switch module 130 is turned on, and the power supply module 120 supplies 24V DC power to the gyroscope. When the switch module 130 is turned off, the gyroscope is powered off. At this time, under normal circumstances, the locking device locks the sensitive part of the gyroscope, and there is no force on the suspension wire. The force detection module 140 detects that there is no force on the suspension wire, obtains the corresponding force detection result, and causes the power failure protection module 150 to be turned off, ensuring that the suspension wire is powered off.
[0023] The force detection module 140 can obtain the force detection result by directly detecting the force on the suspension wire, or by detecting whether the locking device locks the sensitive part of the gyroscope. When the locking device locks the sensitive part of the gyroscope, it is equivalent to the suspension wire not being under force; when the locking device does not lock the sensitive part of the gyroscope, it is equivalent to the suspension wire being under force.
[0024] If a fault occurs, the switch module 130 is disconnected. If the wire is still under force, the force detection module 140 detects that the wire is still under force and obtains the corresponding force detection result. Under the action of the force detection result, the power failure protection module 150 controls the power supply module 120 to continue supplying power to the wire to ensure that the wire is still energized when under force. After receiving the force detection result, the first terminal of the controller 110 controls the drive motor to rotate through the second terminal, thereby driving the locking device to lock the sensitive part of the gyroscope.
[0025] When the locking device locks the sensitive part of the gyroscope, the suspension wire is no longer under force. After the force detection module 140 detects that the suspension wire is no longer under force, it obtains the corresponding force detection result. At this time, under the action of the force detection result, the power failure protection module 150 controls the power supply module 120 to stop supplying power to the suspension wire, so that the suspension wire is de-energized and the suspension wire is no longer under force after the power is de-energized.
[0026] When the switch module 130 is on, even if the sling is under stress, it is not necessary to control the power supply module 120 to cut off power via the power-off protection module 150 or to control the protection execution module 160 to execute preset actions via the controller 110. Only when the switch module 130 is off and the sling is still under stress will the power-off protection module 150 control the power supply module 120 to supply power and the controller 110 control the protection execution module 160 to execute preset actions. Therefore, the switch status of the switch module 130 needs to be sent to the power-off protection module 150 and the controller 110. In this case, when the switch module 130 is off, the status detection result of the switch module 130 can be sent to the controller 110 by the operator, or the status detection result of the switch module 130 can be automatically sent to the controller 110 by the switch module 130.
[0027] At this time, as Figure 1 As shown, the third terminal of the controller 110 is connected between the switch module 130 and ground. At this time, the controller 110 is also used to monitor the switching status of the switch module 130 through the third terminal and obtain the status detection result.
[0028] Specifically, when the switch module 130 is turned on, the power supply module 120 provides 24V DC power. At this time, the third terminal of the controller 110 receives a high level corresponding to 24V. When the switch module 130 is turned off, since the third terminal is connected between the switch module 130 and ground, it is equivalent to grounding, and the third terminal receives a low level. Therefore, by receiving high and low levels at the third terminal, the controller 110 can automatically obtain the status detection result of the switch module 130.
[0029] At this time, the controller 110 determines whether to execute the preset action through the second-end control protection execution module 160 based on the status detection result. Thus, when the switch module 130 is turned on, the status detection result received by the controller 110 at the third end is high, indicating that the switch module 130 is turned on. At this time, even if the wire is under stress, the controller 110 will not execute the preset action through the second-end control protection execution module 160. When the switch module 130 is turned on, the status detection result received by the controller 110 at the third end is low, indicating that the switch module 130 is turned off. At this time, if the wire is under stress, the preset action will be executed through the second-end control protection execution module 160. This realizes the automatic detection of the switch status of the switch module 130 and the power-off protection of the wire based on the status detection result of the switch module 130, improving the automation level of the power-off protection circuit of the gyroscope orientation instrument and reducing manual intervention.
[0030] In this embodiment, a controller 110, a power supply module 120, a switch module 130, a force detection module 140, a power failure protection module 150, and a protection execution module 160 are configured. The switch module 130 and the power failure protection module 150 are both grounded and connected to the power supply module 120. The force detection module 140 is connected to the first terminal of the controller 110 and the power failure protection module 150. The second terminal of the controller 110 is connected to the protection execution module 160. Thus, the switch module 130 controls the power supply module 120. When the 0 is disconnected, if the force detection module 140 detects that the suspension wire is still under force, the power-off protection module 150 controls the power supply module 120 to supply power to the suspension wire, and the controller 110 controls the protection execution module 160 to perform a preset action to remove the force from the suspension wire. When the suspension wire is detected to be free of force, the power-off protection module 150 controls the power supply module 120 to stop supplying power to the suspension wire, ensuring that the suspension wire is de-energized. This achieves the dual protection of the suspension wire being energized when under force and being free of force when disconnected, thus improving the safety of the gyroscope orientation instrument.
[0031] Optional, such as Figure 2 As shown, the force detection module 140 includes: a switch assembly 141 and a logic AND gate 142. The switch assembly 141 is provided with multiple sets of independent limit switches. All sets of limit switches are connected to the logic AND gate 142, and the logic AND gate 142 is connected to the first end. The limit switch is used to obtain the positional relationship result by detecting the positional relationship between the locking device and the gyroscope sensitive part, and then send the positional relationship result to the logic AND gate 142; The AND gate 142 is used to perform a logical AND operation on multiple positional relationship results to obtain the force detection result.
[0032] In this embodiment, the locking device is equipped with multiple limit switches. When the locking device locks the gyroscope sensitive part, the contacts of the corresponding limit switches are in contact. At this time, the positional relationship between the locking device and the gyroscope sensitive part is that the limit switch at that position is on. When the locking device does not lock the gyroscope sensitive part, the contacts of the corresponding limit switches are not in contact. At this time, the positional relationship between the locking device and the gyroscope sensitive part is that the limit switch at that position is still off. Therefore, as long as one limit switch is not on, it means that the locking switch has not locked the gyroscope sensitive part, and the suspension wire is still under force.
[0033] Therefore, the limit switch is connected to the AND gate 142. The limit switch sends the position relationship result to the AND gate 142. The AND gate 142 performs a logical AND operation on the received position relationship results and outputs the force detection result. When the position relationship result shows that at least one limit switch is not conducting, the force detection result indicates that the sling is still under force; otherwise, the force detection result indicates that the sling is not under force, thus realizing the detection of whether the sling is under force.
[0034] Optional, such as Figure 2 As shown, the power failure protection module 150 includes: a first active switch 151, the control terminal of the first active switch 151 is connected to the force detection module 140 and grounded, the input terminal is connected to the power supply module 120, and the output terminal is grounded; The first active switch 151 is used to switch the switch state under the control of the force detection result.
[0035] In this embodiment, the first active switch 151 can be an NPN transistor. When the switch module 130 is turned on, the power supply module 120 will supply power to the gyroscope regardless of whether the NPN transistor is turned on or not. When the switch module 130 is turned off, the NPN transistor needs to be turned off when the wire is not under force to ensure that the power supply module 120 does not supply power to the gyroscope. When the wire is under force, the NPN transistor needs to be turned on to ensure that the power supply module 120 supplies power to the gyroscope.
[0036] Therefore, in this embodiment, the base of the NPN transistor is connected to and grounded by the force detection module 140, so that the force detection module 140 outputs the force detection result based on whether the sling is under force, and inputs it to the base of the NPN transistor, making the switching state of the NPN transistor related to whether the sling is under force. Furthermore, the collector of the NPN transistor is connected to the power supply module 120, and the emitter is grounded. When the sling is still under force, the NPN transistor is turned on, achieving the same function as when the switching module 130 is on, allowing the power supply module 120 to supply power. When the sling is not under force, the NPN transistor is turned off, ensuring that the sling is de-energized.
[0037] Optional, such as Figure 2As shown, the power supply module 120 includes: a power input terminal 121, a power output terminal 122, a second active switch 123, and a passive switch 124. The control terminal of the second active switch 123 is connected to the output terminal of the passive switch 124 and the first active switch 151. The input terminal is connected to the power input terminal 121, and the output terminal is connected to the power output terminal. The power output terminal 122 is connected to the gyroscope. The passive switch 124 is grounded.
[0038] In this embodiment, the passive switch 124 can be a mechanical switch, and the second active switch 123 can be a P-type MOSFET. The conduction and disconnection of the P-type MOSFET are controlled by the passive switch 124. When the passive switch 124 is on, the gate of the P-type MOSFET is grounded, and the P-type MOSFET is on. At this time, the power input terminal 121 provides 24V DC power to the power output terminal 122, and the power output terminal 122 supplies power to the gyroscope. When the passive switch 124 is off, the gate of the P-type MOSFET is at a high level, and the P-type MOSFET is off. At this time, the power input terminal 121 stops providing 24V DC power to the power output terminal 122, and the gyroscope is de-energized.
[0039] When the passive switch 124 is open, the gyroscope is de-energized, and the sling is not under any force. If the sling is still under force, the force detection module 140 outputs the corresponding force detection result. At this time, the NPN transistor is turned on. Since the gate of the P-type MOSFET is connected to the collector of the NPN transistor, and the emitter of the NPN transistor is grounded, when the NPN transistor is turned on, it is equivalent to the gate of the P-type MOSFET being grounded. At this time, the power input terminal 121 provides 24V DC power to the power output terminal 122, and the power output terminal 122 supplies power to the gyroscope. This achieves the goal of controlling the P-type MOSFET to turn on when the passive switch 124 is open but the sling is still under force, ensuring that the sling is still energized when under force, and preventing the sling from still being under force when the power is off.
[0040] If the locking device locks the sensitive part of the gyroscope by driving the motor, when the suspension wire is not under force, the force detection module 140 outputs the corresponding force detection result. At this time, the NPN transistor is turned off, causing the second active switch 123 to turn off, thereby causing the power input terminal 121 to stop supplying 24V DC power to the power output terminal 122, and the gyroscope orientation device is de-energized. This realizes that when the passive switch 124 is turned off and the suspension wire is not under force, the second relevant switch is turned off by controlling the NPN transistor to ensure that the power is de-energized when the suspension wire is not under force.
[0041] Combination Figure 2 Here is an overview of how this application works: In operation, when the passive switch 124 is turned on, the gate of the P-type MOSFET is grounded, and the P-type MOSFET is turned on. At this time, the power input terminal 121 provides 24V DC power to the power output terminal 122, the gyroscope is powered on, and the suspension wire suspends the sensitive part of the gyroscope. The suspension wire is energized and subjected to force. At this time, the third terminal EX of the MCU... - SW is at a high level.
[0042] When passive switch 124 is open, the third terminal EX of the MCU... - When SW transitions from high to low, the MCU automatically detects the force detection result received by the first terminal SHSOK. Under normal conditions, the locking device locks the gyroscope's sensitive part, and the hanging wire experiences no force. This indicates that the locking device locks the gyroscope's sensitive part, and all contacts of the limit switches in the switching assembly 141 are in contact. Therefore, the force detection result output by the AND gate 142 is low, causing the NPN transistor to open and preventing the P-type MOSFET from conducting. Furthermore, the passive switch 124 is also open, resulting in a high gate level for the P-type MOSFET. The P-type MOSFET is open, the gyroscope is de-energized, and the hanging wire experiences no force.
[0043] If a malfunction occurs, the wire will be de-energized but still under force, indicating that the locking device has not locked the gyroscope's sensitive part. In this case, at least one limit switch contact in the switching assembly 141 will not be in contact, causing the force detection result output by the AND gate 142 to be high. Therefore, the base of the NPN transistor is high, and the NPN transistor conducts, causing the gate of the P-type MOSFET to be low. Thus, the P-type MOSFET conducts, and the power input terminal 121 provides 24V DC power to the power output terminal 122, energizing the gyroscope. This ensures that if the wire is under force when the passive switch 124 is open, the wire is energized.
[0044] Meanwhile, since the first terminal SHSOK of the MCU is connected to the AND gate 142, it can receive a high-level force detection result. At this time, the third terminal EX of the MCU... - When SW switches from high to low, it indicates that the wire should be de-energized and not under force. However, the force detection result received by the first terminal SHSOK of the MCU is high, indicating that the wire is still under force. Therefore, the MCU controls the drive motor to perform a drive action through the second terminal DJCTRL, so that the locking device locks the sensitive part of the gyroscope to ensure that the wire is not under force.
[0045] After the locking device locks the gyroscope's sensitive part, the force detection result output by the AND gate 142 is low, causing the NPN transistor to disconnect, and the first terminal SHSOK of the MCU receives the low-level force detection result, stopping the drive motor from operating.
[0046] This application utilizes the existing power supply module 120, switch module 130, controller 110, and protection execution module 160, and adds a power failure protection module 150 and a force detection module 140. The force detection module 140 is connected to the controller 110 and the power failure protection module 150, and the power failure protection module 150 is connected to the power supply module 120. The force detection module 140 detects the force on the sling and sends the force detection results to the controller 110 and the power failure protection module 150. Based on the force detection results, the power failure protection module 150 is controlled to control the power supply module 120 to supply power when the switch module 130 is disconnected. The circuit structure is simple and effective, and the cost is low.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A power-off protection circuit for a gyroscopic orientation device, comprising: The method is applied to the gyro orientation instrument, which includes a suspension wire, a gyro sensitive part, and a locking device. The power failure protection circuit of the gyro orientation instrument includes a controller, a power supply module, a switch module, a force detection module, a power failure protection module, and a protection execution module. The switch module and the power failure protection module are both grounded and connected to the power supply module. The force detection module is connected to the first terminal of the controller and the power failure protection module. The second terminal of the controller is connected to the protection execution module. The power supply module is used to supply power to the gyroscope under the control of the switch module; The force detection module is used to detect whether the suspension wire is still under force when the switch module is disconnected and the gyroscope is de-energized, and output the force detection result to the power failure protection module and the controller. The power failure protection module is used to ensure that the power supply module supplies power to the gyroscope when the force detection result indicates that the sling is still under force, and to ensure that the power supply module is de-energized when the force detection result indicates that the sling is not under force. The controller is configured to receive the force detection result through the first terminal, and when the force detection result indicates that the sling is still under force, control the protection execution module to perform a preset action through the second terminal, so that the force detection result changes from indicating that the sling is still under force to indicating that the sling is not under force.
2. The power-off protection circuit for a gyroscopic orientation device according to claim 1, characterized in that The third terminal of the controller is connected between the switch module and ground; The controller is also used to monitor the switching state of the switching module through the third terminal and obtain the state detection result.
3. The power-off protection circuit for a gyroscopic orientation device of claim 1, wherein, The force detection module includes: a switch assembly and a logic AND gate. The switch assembly is provided with multiple sets of independent limit switches. All sets of limit switches are connected to the logic AND gate. The logic AND gate is connected to the first end. The limit switch is used to obtain a positional relationship result by detecting the positional relationship between the locking device and the gyroscope sensitive part, and send the positional relationship result to the logic AND gate; The logical AND gate is used to perform a logical AND operation on multiple positional relationship results to obtain the force detection result.
4. The power-fail protection circuit for a gyroscopic orientation instrument of claim 1 wherein, The power failure protection module includes: a first active switch, wherein the control terminal of the first active switch is connected to the force detection module and grounded, the input terminal is connected to the power supply module, and the output terminal is grounded; The first active switch is used to switch the switch state under the control of the force detection result.
5. The power-off protection circuit for a gyroscopic orientation device of claim 4, wherein, The power supply module includes: a power input terminal, a power output terminal, a second active switch, and a passive switch. The control terminal of the second active switch is connected to the passive switch and the output terminal of the first active switch. The input terminal is connected to the power input terminal, and the output terminal is connected to the power output terminal. The power output terminal is connected to the gyroscope. The passive switch is grounded.
6. The power-off protection circuit for a gyroscopic orientation device of claim 5, wherein, The first active switch is an NPN transistor.
7. The power-off protection circuit for a gyroscopic orientation device of claim 6, wherein, The second active switch is a P-type MOS transistor.