CN115524512A - Method for monitoring acceleration by using force balance acceleration sensor - Google Patents
Method for monitoring acceleration by using force balance acceleration sensor Download PDFInfo
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- CN115524512A CN115524512A CN202211052913.9A CN202211052913A CN115524512A CN 115524512 A CN115524512 A CN 115524512A CN 202211052913 A CN202211052913 A CN 202211052913A CN 115524512 A CN115524512 A CN 115524512A
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- acceleration
- acceleration sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/13—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by measuring the force required to restore a proofmass subjected to inertial forces to a null position
- G01P15/132—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by measuring the force required to restore a proofmass subjected to inertial forces to a null position with electromagnetic counterbalancing means
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
A method for monitoring acceleration by using a force balance acceleration sensor is characterized in that the force balance acceleration sensor is arranged on monitored equipment, when acceleration is generated, a moving part of the force balance acceleration sensor moves to trigger the level change of an internal circuit of the force balance acceleration sensor, the current provided to the moving part by the internal circuit changes to promote the moving part to reset and balance, and the current acceleration value of the equipment is calculated in real time according to the current for resetting. The invention calculates the acceleration by adopting the force balance acceleration sensor, and has simple structure, lower cost and accurate result.
Description
Technical Field
The invention relates to a method for monitoring acceleration, in particular to a method for monitoring acceleration by using a force balance acceleration sensor.
Background
Acceleration monitoring is a widely used technique, especially for monitoring acceleration during vehicle operation. The current acceleration monitoring is usually realized by adopting a piezoelectric acceleration sensor, a piezoresistive acceleration sensor or a capacitive acceleration sensor, and the like, the traditional acceleration monitoring mode has very high requirement on the processing precision of the sensor, otherwise, the error of the monitoring result is very large. Meanwhile, the sensitive material has larger temperature drift and time drift, so that higher requirements are placed on the use environment and the use method of the corresponding acceleration sensor. And due to the open loop test principle, the error of the measured output value has large change along with the change of the measured value, and the linearity of the sensor is greatly reduced.
Disclosure of Invention
The invention provides a method for monitoring acceleration by using a force balance acceleration sensor, which aims at solving the problems of high requirement on processing equipment, large drift of sensor parameter characteristics and poor linearity in the current acceleration monitoring mode.
The technical means adopted by the invention to solve the problems are as follows: a method for monitoring acceleration by using a force balance acceleration sensor is characterized in that the force balance acceleration sensor is arranged on monitored equipment, when acceleration is generated, a moving part of the force balance acceleration sensor moves to trigger the level change of an internal circuit of the force balance acceleration sensor, the current provided to the moving part by the internal circuit changes to promote the moving part to reset and balance, and the current acceleration value of the equipment is calculated in real time according to the current for resetting.
Furthermore, the force balance acceleration sensor adopts the paired optical couplers to sense the motion of the motion part, and when the motion part moves at a uniform speed or is static, the motion part and the optical couplers are static relatively; when acceleration occurs, the moving part moves to a position between the paired optical couplers to shield light beams, so that the interpolar current of a collector and an emitter of a phototriode in the paired optical couplers is changed, the level of an internal circuit of the trigger force balance acceleration sensor is changed, the current provided by the internal circuit to the moving part is changed, electromagnetic induction is formed at the moving part, and the moving part is reset under the action of electromagnetic induction acting force.
Furthermore, the force balance acceleration sensor is provided with an induction device and a circuit device, the circuit device is communicated with an external circuit and provides a power supply for the induction device, after the internal resistance of an optical coupler receiving tube of the induction device changes, the circuit device is excited, the circuit device provides reset current to the induction device so as to reset a moving part of the induction device, and acceleration is calculated according to the reset current.
Furthermore, the induction device is provided with a magnet and a rotating mechanism as a moving part, the magnet is insulated from the rotating mechanism, the rotating mechanism is electrically connected with the circuit device, after the whole rotating mechanism rotates, the circuit device provides reset current to the rotating mechanism, and the rotating mechanism generates a magnetic field repulsive to the magnet to force the rotating mechanism to reset.
Further, the rotating mechanism comprises a coil and a pendulum bob which are connected into a whole, a magnetic field is generated by arranging the coil on the periphery of the magnet in the vertical direction, and the north and south poles of the magnet are respectively positioned on two sides of the coil; the rotating mechanism is electrically connected to the circuit device, and the rotating mechanism generates rotation under the action of acceleration, and then the pendulum bob moves to a position between the paired optical couplers.
Further, induction system still is equipped with the cavity skeleton, and magnet and rotary mechanism all locate the cavity inside of skeleton, and the magnet passes through lateral wall department and fixes with the skeleton, and rotary mechanism passes through both ends department and is connected with the skeleton both ends, and skeleton, rotary mechanism and magnet are at the vertical central line overlap.
Furthermore, two ends of the framework are connected with two ends of the rotating mechanism through tensioning wires, and two ends of the framework are electrically connected with the circuit device.
Furthermore, the two ends of the framework are provided with connecting rings, the connecting rings are provided with elastic sheets, the elastic sheets are connected with the rotating mechanism through conductive tension wires, tension wire connecting lines penetrate through the axial center line of the rotating mechanism and are rotating shafts of the rotating mechanism, the elastic sheets are electrically connected with the circuit device, and current is conveyed to the rotating mechanism through the tension wires.
Furthermore, the induction device is also provided with a shell, and the framework is fixed in the sealed shell.
Further, the interior of the housing is filled with damping fluid.
The invention has the beneficial effects that:
1. the invention calculates the acceleration by adopting the force balance acceleration sensor, and has simple structure, lower cost and accurate result.
2. The invention forces the rotating mechanism to reset by adopting the electromagnetic induction between the coil and the magnet which are not in direct contact, thereby ensuring the accuracy of the reset position and further correctly measuring the speed.
3. The invention calculates the acceleration according to the current required by the rotating mechanism when the rotating mechanism is reset, and the calculation process can be realized by software, so that the result is accurate.
4. The tension wire with small torque force is adopted to fix the rotating mechanism in the framework, so that the rotating mechanism is only subjected to tension force of the tension wire at two ends in the non-acceleration sensitive direction, and the influence of external force on the rotating mechanism in the rotating process is reduced as much as possible.
5. The force balance principle of the invention can ensure that the rotating mechanism is always in an initial position state when in work, and further eliminate the influence of other interference torsion.
6. According to the invention, the shell of the induction device is filled with damping liquid, so that the rotating mechanism is soaked in the damping liquid, and the influence of abnormal high-frequency vibration impact on the rotating mechanism in the rotating process is further reduced.
Drawings
FIG. 1 is a schematic diagram of an external structure of a force balancing acceleration sensor according to an embodiment;
FIG. 2 is a schematic view of the internal structure of FIG. 1 with the base removed, and the cable connected thereto is omitted;
FIG. 3 is a schematic diagram of the circuit device of FIG. 2;
FIG. 4 is a schematic view of the sensing device of FIG. 2;
FIG. 5 is a schematic structural view of FIG. 4 with the optocoupler board and the locking board removed;
FIG. 6 is a schematic diagram illustrating optical coupling induction of an induction device according to an embodiment;
FIG. 7 is a schematic view of the pendulum bob moving to block the light beam;
FIG. 8 is a schematic view of the skeleton and related components;
FIG. 9 is a schematic diagram illustrating the positional relationship between a connector, a rotating mechanism and a magnet according to an embodiment, and a tension wire connected between the elastic sheet and the backing plate is not shown;
FIG. 10 is a schematic view of the connecting head shown in FIG. 9;
FIG. 11 is a schematic view of the rotating mechanism of FIG. 9;
in the figure: 1. a base body, 11 seat plates, 12 cable ports, 2 circuit devices, 21 connecting columns, 22 circuit boards, 3 induction devices, 31 shells, 311 wiring ports, 312 sealing covers, 313 locking plates, 314 mounting holes, 32 optical coupling plates, 321 upper plates, 322 lower plates, 323 optical couplings, 33, a framework, 331, an opening, 332, a screw, 333, a convex ring, 34, a connecting ring, 341, an elastic sheet, 342, a wiring terminal, 343, a welding wire point I, 35, a rotating mechanism, 351, a coil frame, 352, a swing roller, 353, a pendulum bob, 354, a welding wire point II, 355, a backing plate and 36 a magnet.
Detailed Description
The invention is further described below with reference to the accompanying drawings. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example one
A method for monitoring acceleration by using a force balance acceleration sensor is to monitor acceleration by using the force balance acceleration sensor shown in figure 1, and the specific implementation mode is as follows: set up a motion part and opto-coupler in power balance acceleration sensor, when static or uniform motion, relative static between motion part and opto-coupler, when producing acceleration, motion part produces the motion under the inertia effect, shelters from the light beam, triggers power balance acceleration sensor internal circuit level change, makes internal circuit provide reset current and makes it reset to rotary part, simultaneously according to reset current's big or small calculation acceleration.
As shown in fig. 1, the force balance acceleration sensor (hereinafter referred to as sensor) in this embodiment includes a base 1 as seen from the outside, a base plate 11 is disposed at the bottom of the base 1, the sensor is fixedly mounted through the base plate 11, a cable port 12 is further disposed on the base, a cable connected to an internal structure of the sensor extends out of the cable port 12 and is connected to a device for calculation, the cable transmits a reset current to the device for calculation, and a software program in the device calculates an acceleration according to the reset current. The cable port 12 can be one or more and can be arranged on the top or the side wall of the holder body 1.
As shown in fig. 2, a circuit device 2 and an induction device 3 are disposed in an inner space enclosed by the seat body 1 and the seat plate 11, and both the circuit device 2 and the induction device 3 are fixed on the seat plate 11. As shown in fig. 3, the circuit device 2 includes a plurality of connection posts 21 and a circuit board 22 supported and connected by the connection posts 21. The optical coupler 323 and the moving part are arranged on the induction device 3, the circuit board 22 is connected with the induction device 3 through a cable, and meanwhile, part of the cable of the circuit board 22 is also connected to a device for calculation (the cable is not shown in the figure) through the cable port 12. The circuit board 22 provides power and reset current for the sensing device 3, and also transmits the reset current to an external device for calculation.
As shown in fig. 4, the sensing device 3 is a sealed structure with a cavity inside formed by a housing 31 and a sealing cover 312, a wire connection port 311 is provided on the wall of the housing 31 (or the sealing cover 312), the internal cable is connected to the circuit board 22 through the wire connection port 311, and the wire connection port 311 can be fixed by waterproof adhesive or soldering to ensure the sealing inside the sensing device 3.
As shown in fig. 6, a frame 33 and an optical coupler plate 32 are arranged inside the sensing device 3, as shown in fig. 9, a rotating mechanism 35 and a magnet 36 are arranged inside the frame 33, the rotating mechanism 35 is used as a moving part, as shown in fig. 11, and comprises a backing plate 355, a coil frame 351, a pendulum roller 352 and a pendulum 353, the backing plate 355, the coil frame 351, the pendulum roller 352 and the pendulum 353 are rigidly connected, and when acceleration is generated, the rotating mechanism 35 integrally generates rotating motion. The pad 355 is made of a conductive material, a coil is wound around the bobbin 351 and is communicated with the pad 355, and the pendulum 353 is connected to the bobbin 351 and the pad 355 through the pendulum roller 352. As shown in fig. 8, an opening 331 is provided in a wall of the frame 33, the swing roller 352 extends from the opening 331, and the pendulum 353 is located outside the frame 33. As shown in fig. 7, the optical coupler plate 32 is provided with an upper plate 321 and a lower plate 322, a pair of optical couplers 323 is arranged between the upper plate 321 and the lower plate 322, and there are two pairs of optical couplers 323, and the pendulum 353 extends between the upper plate 321 and the lower plate 322, and when the device is static or moves forward at a constant speed, the pendulum 353 is located between the two pairs of optical couplers 323, and does not block light beams of any pair of optical couplers 323; when acceleration is generated, the pendulum 353 moves to a pair of optical couplers 323 to shield light beams, interelectrode current between a collector and an emitter of a phototriode in the optical couplers 323 is changed, level change of the circuit board 22 is triggered, and the circuit board 22 supplies power to the rotating mechanism 35. In this embodiment, there are two pairs of optical couplers 323, and when the acceleration or deceleration is performed, the pendulum 353 can always block the light beam of one pair of optical couplers 323, and then the acceleration and the deceleration are distinguished by a suitable circuit program control, that is, the acceleration can always be detected. As shown in fig. 5, still be equipped with mounting hole 314 on the casing, opto-coupler plate 32 is installed in mounting hole 314 department, upper plate 321 and hypoplastron 322 are inside towards casing 31, in order to guarantee the inside leakproofness of induction system 3, can set up the sealing washer in the position of opto-coupler plate 32 with the contact of casing 31 (like this embodiment, can set up the round sealing washer in the periphery of opto-coupler plate 32), also can seal the bonding at the casing with waterproof glue (nevertheless this mode probably is not convenient for later maintenance dismantlement) with the opto-coupler plate, the cable of being connected with opto-coupler 323 passes opto-coupler plate 32 and is connected with circuit board 22, of course, this cable passes a department and seals. In this embodiment, in order to fix the optical coupler plate 32 to the housing 31 more stably, a locking plate 313 fixed to the housing 31 is further provided outside the optical coupler plate 32, a part of the locking plate 313 contacts with the optical coupler plate 32, and another part contacts with the housing 31, but a connection point may be only located between the locking plate 313 and the housing 31, for example, a threaded blind hole is provided in the housing 31, a through hole or a threaded hole is provided in the locking plate 313, and the locking plate 313 and the housing 31 are fixed by a bolt or the like. Of course, the optical coupler plate 32 and the sealing plate 312 may be formed integrally.
As shown in fig. 8, the frame 33 is provided with two protruding rings 333 with through holes in the middle at two ends, the two connecting rings 34 are respectively sleeved on the two protruding rings 333 through the through holes in the middle, and each connecting ring 34 is fixed at two ends of the frame 33 through at least one screw 332. In this embodiment, the connection ring 34 is made of a conductive material, and the frame 33 is an insulator or is made of an insulating material at least partially, so that the two ends can be insulated. As shown in fig. 9 and 10, the connection ring 34 is provided with a spring piece 341 and a connection terminal 342, one end of the cable is connected to the connection terminal 342, and the other end is connected to the connection port 311, and since the connection ring 34 is made of a conductive material, the current flowing from the circuit board 22 flows to the spring piece 341 through the connection terminal 342. In the present embodiment, both ends of the tensile wire are fixedly connected to the elastic piece 341 and the backing plate 355 by welding, as shown in fig. 10 and 11, the elastic piece 341 has a first welding wire point 343, the backing plate 355 has a second welding wire point 354, when both ends of the tensile wire are respectively connected to the elastic piece 341 and the backing plate 355 at the first welding wire point 343 and the second welding wire point 354, the connection ring 34 is electrically connected to the coil of the coil frame 351, the entire rotating mechanism 35 is fixed to the framework 33 only by the tensile wires at both ends, the tensile wire connection line is the rotation axis of the entire rotating mechanism 35, and the magnet 36 can be fixed in the framework 33 by its side wall (for example, by using an adhesive) and no relative motion is generated between the magnet 36 and the framework during the operation. In order to ensure that the rotating mechanism 35 can be reset smoothly after rotating, the magnet 36 in this embodiment is a cylindrical permanent magnet that is magnetized radially, i.e., the north-south direction of the magnet is perpendicular to the cylindrical direction of the magnet. That is, the coil bobbin 351 is disposed on the outer periphery of the magnet 36, the entire rotating mechanism 35 is not in contact with the magnet 36, the central axis of the coil bobbin 351 is consistent with the central axis of the magnet 36 and is consistent with the tensile wire connecting line, and when the train is at rest or in uniform motion, the north and south poles of the magnet 36 are respectively located on the two sides of the coil bobbin 351. When the rotating mechanism 35 rotates, the coil is energized to generate a magnetic field, which repels the magnet 36, thereby resetting the rotating mechanism 35.
In order to improve the vibration resistance and reduce the high-frequency vibration interference, a non-conductive damping fluid such as silicone oil is filled in the housing 31 for sealing, at this time, the framework 33 may also be fixed in the housing 31 in an adhesive manner, and of course, the framework 33 is also filled with the damping fluid, so that the whole sensing device 3 has a better vibration resistance effect.
The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A method of monitoring acceleration using a force-balanced acceleration sensor, characterized by: by arranging the force balance acceleration sensor on the monitored equipment, when acceleration is generated, a moving part of the force balance acceleration sensor moves to trigger the level of an internal circuit of the force balance acceleration sensor to change, the current provided by the internal circuit to the moving part changes to prompt the moving part to reset and balance, and the current acceleration value of the equipment is calculated in real time according to the reset current.
2. The method of monitoring acceleration using a force balanced acceleration sensor of claim 1, characterized by: the force balance acceleration sensor adopts the paired optical couplers to sense the motion of the motion part, and when the motion part moves at a constant speed or is static, the motion part and the optical couplers are static relatively; when acceleration occurs, the moving part moves to a position between the paired optical couplers to shield light beams, so that the interpolar current of a collector and an emitter of a phototriode in the paired optical couplers is changed, the level of an internal circuit of the trigger force balance acceleration sensor is changed, the current provided by the internal circuit to the moving part is changed, electromagnetic induction is formed at the moving part, and the moving part is reset under the action of electromagnetic induction acting force.
3. The method of monitoring acceleration using a force-balanced acceleration sensor of claim 2, characterized in that: the force balance acceleration sensor is provided with an induction device (3) and a circuit device (2), the circuit device (2) is communicated with an external circuit and provides a power supply for the induction device (3), after the internal resistance of an optical coupler (323) receiving tube of the induction device (3) changes, the circuit device (2) is excited, the circuit device (2) provides reset current to the induction device (3) so as to reset a moving part of the induction device (3), and acceleration is calculated according to the reset current.
4. The method of monitoring acceleration using a force balanced acceleration sensor of claim 3, characterized by: the induction device (3) is provided with a magnet (36) and a rotating mechanism (35) serving as a moving part, the magnet (36) and the rotating mechanism (35) are insulated, the rotating mechanism (35) is electrically connected with the circuit device (2), after the rotating mechanism (35) rotates, the circuit device (2) provides reset current to the rotating mechanism (35), and the rotating mechanism (35) generates a magnetic field repulsive to the magnet (36) to force the rotating mechanism (35) to reset.
5. The method of monitoring acceleration using a force balanced acceleration sensor of claim 4, characterized by: the rotating mechanism (35) comprises a coil and a pendulum bob (353) which are connected into a whole, a magnetic field is generated by arranging the coil on the periphery of the magnet (36) in the vertical direction, and the north pole and the south pole of the magnet (36) are respectively positioned on the two sides of the coil; the rotating mechanism (35) is electrically connected to the circuit device (2), and the rotating mechanism (35) generates rotation under the action of acceleration, and then the pendulum (353) moves to a position between the paired optical couplers (323).
6. The method of monitoring acceleration using a force-balanced acceleration sensor of claim 4, characterized in that: induction system (3) still are equipped with cavity skeleton (33), and magnet (36) and rotary mechanism (35) are all located the cavity inside of skeleton (33), and magnet (36) are fixed with skeleton (33) through lateral wall department, and rotary mechanism (35) are connected with skeleton (33) both ends through both ends department, and skeleton (33), rotary mechanism (35) and magnet (36) overlap at vertical ascending central line.
7. The method of monitoring acceleration using a force balanced acceleration sensor of claim 6, characterized by: two ends of the framework (33) are connected with two ends of the rotating mechanism (35) through tensile wires, and two ends of the framework (33) are electrically connected with the circuit device (2).
8. The method of monitoring acceleration using a force balanced acceleration sensor of claim 6, characterized by: the two ends of the framework (33) are provided with connecting rings (34), the connecting rings (34) are provided with elastic sheets (341), the elastic sheets (341) are connected with the rotating mechanism (35) through conductive tensile wires, a tensile wire connecting line penetrates through the axial center line of the rotating mechanism (35) and is a rotating shaft of the rotating mechanism (35), the elastic sheets (341) are electrically connected with the circuit device (2), and current is transmitted to the rotating mechanism (35) through the tensile wires.
9. The method of monitoring acceleration using a force-balanced acceleration sensor of claim 6, characterized in that: the induction device (3) is also provided with a shell (31), and the framework (33) is fixed in the sealed shell (31).
10. The method of monitoring acceleration using a force balanced acceleration sensor of claim 9, characterized by: the interior of the shell (31) is filled with damping fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211052913.9A CN115524512A (en) | 2022-08-31 | 2022-08-31 | Method for monitoring acceleration by using force balance acceleration sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211052913.9A CN115524512A (en) | 2022-08-31 | 2022-08-31 | Method for monitoring acceleration by using force balance acceleration sensor |
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| CN115524512A true CN115524512A (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211052913.9A Pending CN115524512A (en) | 2022-08-31 | 2022-08-31 | Method for monitoring acceleration by using force balance acceleration sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963293A (en) * | 2023-02-07 | 2023-04-14 | 北京神导科技股份有限公司 | Anti-seismic and anti-impact quartz flexible accelerometer |
-
2022
- 2022-08-31 CN CN202211052913.9A patent/CN115524512A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963293A (en) * | 2023-02-07 | 2023-04-14 | 北京神导科技股份有限公司 | Anti-seismic and anti-impact quartz flexible accelerometer |
| CN115963293B (en) * | 2023-02-07 | 2023-07-18 | 北京神导科技股份有限公司 | Anti-seismic impact-resistant quartz flexible accelerometer |
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