CN118500445A - Device and method for performance test of inclination sensor - Google Patents
Device and method for performance test of inclination sensor Download PDFInfo
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- CN118500445A CN118500445A CN202410978224.3A CN202410978224A CN118500445A CN 118500445 A CN118500445 A CN 118500445A CN 202410978224 A CN202410978224 A CN 202410978224A CN 118500445 A CN118500445 A CN 118500445A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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- Manufacturing & Machinery (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
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Abstract
The invention discloses a device and a method for testing performance of an inclination sensor, which relate to the field of a system testing device for wind tunnels, wherein the device comprises: a mechanical table body and an electric control system; the mechanical table body comprises: a pitch assembly, a roll assembly, a vibration assembly, and a measurement assembly; the electric control system is used for controlling the testing process of the inclination sensor based on the mechanical table body, obtaining measurement data, and calculating and outputting measurement results; the pitching assembly is used for completing pitching angle rotation of the inclination sensor; the rolling assembly is connected with the pitching assembly, the vibration assembly and the measuring assembly, and is used for completing rolling angle rotation of the inclination sensor; the vibration assembly is used for providing a vibration environment for the inclination sensor; the measuring component is used for measuring vibration data of the inclination sensor; the invention can test the inclination angle sensor and ensure the measurement reliability of the inclination angle sensor.
Description
Technical Field
The invention relates to the field of wind tunnel system testing devices, in particular to a device and a method for testing performance of an inclination sensor.
Background
The inclination angle sensor is an important component of the wind tunnel model state measurement system.
The applicant has developed an inclination sensor capable of obtaining the attitude data of a model, but since the inclination sensor is newly developed, the prior art lacks a testing device of the system, and the inclination sensor needs to be tested before use, and the test can be used after passing.
Disclosure of Invention
In order to test an inclination sensor and ensure the measurement reliability thereof, the invention provides a device for testing the performance of the inclination sensor, which comprises:
a mechanical table body and an electric control system; the mechanical table body comprises: a pitch assembly, a roll assembly, a vibration assembly, and a measurement assembly; the electric control system is used for controlling the testing process of the inclination sensor based on the mechanical table body, obtaining measurement data, and calculating and outputting measurement results; the pitching assembly is used for completing pitching angle rotation of the inclination sensor; the rolling assembly is connected with the pitching assembly, the vibration assembly and the measuring assembly, and is used for completing rolling angle rotation of the inclination sensor; the vibration assembly is used for providing a vibration environment for the inclination sensor; the measuring component is used for measuring vibration data of the inclination sensor.
The ground testing device can complete posture position adjustment in two directions of pitching and rolling by utilizing the pitching assembly and the rolling assembly, and vibration and test of corresponding magnitude are carried out by the vibration assembly and the measuring assembly in a tested area, so that ground testing and performance verification of the inclination sensor can be realized.
Preferably, the pitch assembly comprises:
The two ends of the U-shaped frame are respectively provided with a driving end and an angle measuring end; the driving end is provided with a rotating shaft, the rotating shaft is matched with a bearing to be installed in a bearing seat of the U-shaped frame to form a rotating shaft system, a motor rotating part is installed on the rotating shaft, a motor fixing part is installed in the U-shaped frame, the tail end of the rotating shaft system is covered by a first outer cover, and the motor is used for rotating based on the control of an electric control system;
The angle measuring end is provided with a rotary shaft, the rotary shaft is connected with the rotary shaft, the rotary shaft is matched with a bearing to be installed in a bearing seat of the U-shaped frame to form a rotary shaft system, a first electromagnetic brake and an angle sensor in the angle measuring end are installed on the rotary shaft, and the tail end of the rotary shaft system is covered by a second housing; the first electromagnetic brake is used for locking the rotary shaft system based on the control of the electric control system, and the angle sensor is used for measuring the angle rotation data of the rotary shaft.
The U-shaped frame is adopted to conveniently adjust the pitching angle, the pitching assembly mainly completes pitching angle rotation of the inclination angle sensor, and the pitching assembly is provided with a driving end responsible for torque output, a measuring angle end for measuring angle and electromagnetic braking and a frame for supporting.
The angle sensor measures angle rotation data of the rotary shaft, and when the angle data is rotated to preset angle data, the first electromagnetic brake locks the rotary shaft system based on the control of the electric control system, so that adjustment of pitching angle is realized.
Preferably, the driving end is provided with a wiring board and a rotary limiting block for wiring and mechanical limiting of the electric appliance. The wiring board provides a cable wiring position for the electronic device, is provided with a rotary limiting plate, and prevents the condition that the electric interference leads to rotating a plurality of circles and stirring wires.
Preferably, the roll assembly comprises:
The device comprises a rolling motor, a rolling shaft, a motor mounting bracket, a second electromagnetic brake, a rolling bearing supporting box body, a rolling counterweight and a pitching counterweight;
The rolling motor is installed in the motor installing support, the rolling motor is connected with one end of the rolling shaft, the other end of the rolling shaft passes through the rolling bearing supporting box body and then is connected with the vibration assembly installing flange, the second electromagnetic brake is installed on the rolling motor, the pitching balancing weight is installed on the motor installing support, the motor installing support is fixedly connected with the rolling bearing supporting box body, the pitching shaft installing flange is arranged on the rolling bearing supporting box body, the measuring assembly installing flange is arranged on the rolling shaft, and the rolling balancing weight is installed on the vibration assembly.
The rolling motor carries out rolling operation based on control of an electric control system, after rolling a preset angle, the second electromagnetic brake is controlled to brake based on control of the electric control system to realize accurate rolling angle adjustment, balance is needed to be carried out before the rolling motor is used for meeting stable, accurate and controllable rotation of a shafting, a pitching balancing weight is used for balancing the mass center position of the rotation direction of a pitching shaft, a rolling shaft balancing weight is used for balancing the mass center position of the rotation direction of the rolling shaft, and the mass center position is adjusted by changing the number of weights and adjusting the distance from corresponding parts to the rolling shaft center.
Preferably, the vibration assembly includes:
The vibration device comprises a vibrating arm, a vibrating bracket, a follower arm bracket, an electromagnetic vibration exciter and a laser vibration meter;
The vibrating arm front end is used for installing the measured object, the vibrating arm rear end is connected with the roll subassembly, the vibrating bracket front end is connected with electromagnetic vibration exciter, electromagnetic vibration exciter is used for providing vibration environment for the vibrating arm, the vibrating bracket rear end is connected with the roll subassembly, the follower arm front end is connected with the follower arm bracket front end, the follower arm bracket rear end is connected with the roll subassembly, the measuring assembly is installed on the follower arm, the measuring assembly is used for measuring the vibration data of measured object.
The vibration component controls the electromagnetic vibration exciter to drive the tested object to vibrate through the electric control system, the laser vibration meter is used for measuring vibration data of the tested object, judging whether the vibration of the electromagnetic vibration exciter needs to be regulated or not based on the vibration data obtained through measurement, and realizing accurate vibration of the tested object.
Preferably, the measuring assembly comprises 3 laser vibrometers. 3 vibration data are obtained through measurement of 3 laser vibration meters, and accurate vibration measurement of the measured object is achieved.
Preferably, the inclination sensor includes: the sensor comprises a shell, and a sensitive assembly, an upper yoke assembly, a lower yoke assembly, a magnetic steel assembly, a servo circuit board assembly and a connecting cable which are arranged in the shell, wherein the inclination sensor further comprises a sensor body arranged in the shell: the device comprises a vibration sensor, a temperature sensor, a heating resistor loop, a temperature circuit board assembly and a connecting cable; the temperature sensor is used for detecting the temperature of damping liquid in the shell and transmitting detected temperature information to the temperature circuit board assembly; the heating resistor loop is used for heating damping liquid in the shell; the vibration sensor is used for collecting external vibration environment data of the inclination sensor and transmitting the external vibration environment data to the temperature circuit board assembly; the temperature circuit board assembly is used for controlling the output power of the heating resistor loop based on external vibration environment data and temperature information.
The invention also provides a test method of the device for testing the performance of the inclination angle sensor, which comprises the following steps:
Step 1: powering on the device, and installing an inclination sensor on the device;
step 2: the pitching component and the rolling component rotate to find a zero position;
step 3: the electronic control system sends a control instruction to control the pitching assembly to rotate to a first preset angle;
Step 4: the electronic control system sends a control instruction to control the rolling assembly to rotate to a second preset angle;
Step 5: the electronic control system sends a control instruction to control the vibration assembly to vibrate;
step 6: the measuring component is used for measuring vibration data of the inclination sensor.
The one or more technical schemes provided by the invention have at least the following technical effects or advantages:
the invention can realize the test of the inclination angle sensor and ensure the measurement reliability of the inclination angle sensor.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is an overall schematic diagram of a ground testing device for an inclination sensor;
FIG. 2 is a schematic structural view of a roll assembly;
FIG. 3 is a schematic structural view of a roll shaft;
FIG. 4 is a schematic diagram of the composition of the tilt sensor;
the device comprises a 1-shell, a 2-fourth vibration sensor, a 3-servo circuit board assembly, a 4-upper yoke assembly, a 5-lower yoke assembly, a 6-sensitive assembly, a 7-magnetic steel assembly, an 8-temperature sensor, a 9-heating resistor loop, a 10-elastic piece, 11-damping liquid, a 12-U-shaped frame, a 13-angle measurement end, a 14-pitching balancing weight, a 15-rolling balancing weight, a 16-second electromagnetic brake, a 17-motor mounting bracket, a 18-rolling shaft, a 19-vibrating arm, a 20-vibrating bracket, a 21-follower arm, a 22-follower arm bracket, a 23-electromagnetic vibration exciter, a 24-laser vibration meter, a 25-rolling bearing support box body, a 26-pitching shaft mounting flange, a 27-measuring assembly mounting flange and a 28-vibrating arm mounting flange.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. In addition, the embodiments of the present invention and the features in the embodiments may be combined with each other without collision.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than within the scope of the description, and therefore the scope of the invention is not limited to the specific embodiments disclosed below.
Embodiment one;
referring to fig. 1, fig. 1 is an overall schematic diagram of an apparatus for testing performance of an inclination sensor, and the invention provides an apparatus for testing performance of an inclination sensor, which includes:
a mechanical table body and an electric control system; the mechanical table body comprises: a pitch assembly, a roll assembly, a vibration assembly, and a measurement assembly; the electric control system is used for controlling the testing process of the inclination sensor based on the mechanical table body, obtaining measurement data, and calculating and outputting measurement results; the pitching assembly is used for completing pitching angle rotation of the inclination sensor; the rolling assembly is connected with the pitching assembly, the vibration assembly and the measuring assembly, and is used for completing rolling angle rotation of the inclination sensor; the vibration assembly is used for providing a vibration environment for the inclination sensor; the measuring component is used for measuring vibration data of the inclination sensor.
The device for testing the performance of the inclination angle sensor can finish posture position adjustment in two directions of pitching and rolling, and vibration and test of corresponding magnitude are carried out in a detected area, so that ground test, algorithm research and performance verification of a system model machine can be realized in a normal temperature environment.
The device for the performance test of the inclination angle sensor comprises a mechanical platform body and an electric control system, wherein the mechanical platform body comprises a pitching assembly, a rolling assembly, a vibrating assembly and a measuring assembly, and the electric control system comprises a measurement and control cabinet, a control circuit, a power supply circuit, a display, an angle measuring system, a computer and a control panel. The whole module is realized by adopting a measurement and control cabinet through an electric control mode controlled by a serial port.
The working flow of the device for the performance test of the inclination angle sensor is as follows: powering on a test device, rotating a pitching assembly and a rolling assembly to find a zero position, sending an instruction to a measurement and control cabinet, obtaining an instruction of a superior system or a superior computer by a control circuit, driving a motor to rotate by a driving circuit, rotating a rotating shaft, feeding back a rotating angle in real time by an angle measuring system, indexing to a specified angle position, positioning the pitching angle, turning a swing arm by the rolling assembly, positioning the rolling angle, starting vibration by the vibration assembly according to the instruction, and collecting data by the control system. The user controls the operation of the device for testing the performance of the inclination sensor through a software operation interface on the measurement and control cabinet.
When the pitching component of the device for testing the performance of the inclination sensor is in a zeroing or indexing state, a user inputs any target angular position value within a preset angular range through the measurement and control cabinet according to the requirement. And after the operation, the measurement and control cabinet converts corresponding driving signals according to the instructions and inputs the driving signals to the control circuit, and the motor drives the rotating shaft to move at a certain speed. The angular measurement system then compares the instantaneous angle of rotation with the input signal until the command signal and the feedback signal are zero, and the pitch assembly stops rotating, and the electromagnetic relay or motor is locked in this position.
When the rolling component of the device for testing the performance of the inclination sensor is in a zero return or transposition state, a user inputs any target angular position value within a preset angular range through the measurement and control cabinet according to the need, the measurement and control cabinet converts corresponding driving signals according to instructions after operation, and the motor drives the rotating shaft to move at a certain speed. The angular measurement system then compares the instantaneous angle of rotation with the input signal until the command signal and the feedback signal are zero, the roll assembly stops rotating, and the electromagnetic relay or motor is locked in this position.
When the device for the performance test of the inclination sensor reaches the designated gesture position, a user inputs parameters of vibration acceleration and vibration frequency through the measurement and control cabinet according to the need, the measurement and control cabinet converts corresponding driving signals according to the instructions after operation and inputs the driving signals to the control circuit, and the vibration assembly vibrates according to the requirement. At the moment, the laser vibration measuring sensor in the measuring assembly synchronously measures the vibration state and feeds back the vibration state to the measuring and controlling cabinet, and the measuring result is displayed on the feedback interface of the laser sensor after being resolved.
Wherein, in an embodiment of the present invention, the pitch assembly comprises:
The two ends of the U-shaped frame are respectively provided with a driving end and an angle measuring end; the driving end is provided with a rotating shaft, the rotating shaft is matched with a bearing to be installed in a bearing seat of the U-shaped frame to form a rotating shaft system, a motor rotating part is installed on the rotating shaft, a motor fixing part is installed in the U-shaped frame, the tail end of the rotating shaft system is covered by a first outer cover, and the motor is used for rotating based on the control of an electric control system;
The angle measuring end is provided with a rotary shaft, the rotary shaft is connected with the rotary shaft, the rotary shaft is matched with a bearing to be installed in a bearing seat of the U-shaped frame to form a rotary shaft system, a first electromagnetic brake and an angle sensor in the angle measuring end are installed on the rotary shaft, and the tail end of the rotary shaft system is covered by a second housing; the first electromagnetic brake is used for locking the rotary shaft system based on the control of the electric control system, and the angle sensor is used for measuring the angle rotation data of the rotary shaft.
Wherein, the angle sensor adopts a circular grating. The single code channel and the true absolute position code of the circular grating are directly carved on the outer edge of the circular grating, and the circular grating is matched with a reading head, so that an angle signal can be accurately read, and the anti-fouling capability is high. The device is light and thin in size, large in inner diameter and easy to integrate into most of installation designs, and meanwhile, the low-mass and low-moment-of-inertia design of the device has little influence on the dynamic performance of the system.
In the embodiment of the invention, the driving end is provided with the wiring board and the rotary limiting block for wiring and mechanical limiting of the electric appliance.
In an embodiment of the present invention, referring to fig. 2 to 3, the rolling assembly includes:
The device comprises a rolling motor, a rolling shaft, a motor mounting bracket, a second electromagnetic brake, a rolling bearing supporting box body, a rolling counterweight and a pitching counterweight;
The rolling motor is installed in the motor installing support, the rolling motor is connected with one end of the rolling shaft, the other end of the rolling shaft passes through the rolling bearing supporting box body and then is connected with the vibration assembly installing flange, the second electromagnetic brake is installed on the rolling motor, the pitching balancing weight is installed on the motor installing support, the motor installing support is fixedly connected with the rolling bearing supporting box body, the pitching shaft installing flange is arranged on the rolling bearing supporting box body, the measurement assembly installing flange is arranged on the rolling shaft, the rolling balancing weight is installed on the vibration assembly, the rolling assembly is connected with the pitching shaft through the pitching shaft installing flange, the rolling assembly is connected with the measurement assembly through the measurement assembly installing flange, and the rolling assembly is connected with the vibration arm through the vibration arm installing flange.
Wherein, in the embodiment of the invention, the vibration assembly comprises:
The vibration device comprises a vibrating arm, a vibrating bracket, a follower arm bracket, an electromagnetic vibration exciter and a laser vibration meter;
The vibrating arm front end is used for installing the measured object, the vibrating arm rear end is connected with the roll subassembly, the vibrating bracket front end is connected with electromagnetic vibration exciter, electromagnetic vibration exciter is used for providing vibration environment for the vibrating arm, the vibrating bracket rear end is connected with the roll subassembly, the follower arm front end is connected with the follower arm bracket front end, the follower arm bracket rear end is connected with the roll subassembly, the measuring assembly is installed on the follower arm, the measuring assembly is used for measuring the vibration data of measured object.
The vibrating arms adopt a rib plate structure, and the weight is reduced as much as possible on the premise of keeping certain rigidity, so that the subsequent vibration starts.
The elastic support of the vibrating arm drives the structural components to work in the designed magnetic circuit air gap, so that the driving coil can obtain free up-and-down vibration after being electrified, and a guide mechanism is designed in the embodiment of the invention and is used for limiting the undesired transverse movement.
The follow-up arm is used for installing the laser vibration meter, can synchronously rotate along with the rotation of the pitching posture of vibration, realizes follow-up of pitching direction, can reduce the range requirement of the laser vibration meter selected, and can meet the testing requirements of the vibration arm in pitching and horizontal directions.
Wherein, in the embodiment of the invention, the measuring assembly comprises 3 laser vibrometers. The working principle of the measuring assembly is that three laser vibration meters are arranged in the vibration axis direction of a measured object, static relative distance between the three laser vibration meters and the measured object is kept unchanged, when the measured object is in cantilever vibration, the three laser vibration meters synchronously measure displacement of the measured object, meanwhile, a vibration sensor is used for measuring absolute vibration quantity of the laser vibration meters, synchronous vibration compensation is carried out, common-mode vibration errors are eliminated, after accurate vibration displacement is obtained, data fusion and curvature fitting calculation are carried out, and finally real-time angle values of target points are calculated.
Two levels are arranged on the vibrating arm and used for measuring and correcting static zero positions.
Embodiment two;
On the basis of the first embodiment, although the prior art solves the problem of measuring the angle of the carrier, the following problems still exist: firstly, the air damping quartz flexible pendulum acceleration sensor is adopted, and the structure and the servo system are designed, so that the bandwidth of the sensor is wider, the performance is easily influenced by external interference, and particularly under the vibration interference of the broadband, a larger measurement error under the vibration condition can be generated; secondly, the flexible pendulum accelerometer adopting damping liquid at present adopts a temperature compensation measuring device, so that the flexible pendulum structure works in a relatively fixed damping state, and better overload capacity and impact resistance can be realized. However, the carrier inclination angle can not be adaptively changed according to the change of the external vibration environment, so that the carrier inclination angle sensor has certain limitation on the suppression of the broadband vibration interference.
In order to achieve the above objective, please refer to fig. 4, fig. 4 is a schematic structural diagram of an inclination sensor, and the present invention provides an inclination sensor, which includes: a shell, a sensitive component, an upper yoke component, a lower yoke component, a magnetic steel component, a control and servo circuit component and a connecting cable which are positioned in the shell, the tilt sensor further includes, within the housing: the device comprises a vibration sensor, a temperature sensor, a heating resistor loop, a temperature circuit board assembly and a connecting cable; the temperature sensor is used for detecting the temperature of damping liquid in the shell and transmitting detected temperature information to the temperature circuit board assembly; the heating resistor loop is used for heating damping liquid in the shell; the vibration sensor is used for collecting external vibration environment data of the inclination sensor and transmitting the external vibration environment data to the temperature circuit board assembly; the temperature circuit board assembly is used for controlling the output power of the heating resistor loop based on external vibration environment data and temperature information.
Currently, in the application field of carrier attitude measurement, an inclination sensor is widely used for inclination angle measurement of a carrier. The working environment of the carrier has wide-band vibration interference, the measuring bandwidth of the conventional measuring tilt sensor is larger than about 100Hz, and due to the existence of high-frequency vibration, vibration measuring errors are introduced, so that the measuring precision is reduced. According to the invention, a liquid damping modulation technical means is adopted, namely, the damping liquid in the shell is heated based on external vibration environment data and temperature information, the change amount of the vibration environment is extracted through the vibration sensor, the temperature change in the tilt sensor is modulated through the temperature circuit board assembly, the liquid damping performance is changed, the problem that the vibration interference under the broadband condition affects the tilt angle measurement precision of the carrier is solved, and the high-precision tilt angle measurement requirement under the static state or quasi-static state of the carrier is realized. The invention aims at the wide-band vibration condition of the gravitational field to realize the measurement of the carrier inclination angle and reduce the influence of high-frequency vibration and impact on the performance of the carrier inclination angle sensor.
Preferably, the damping coefficient of the damping liquid is related to the temperature change of the damping liquid. The purpose of the design is to conveniently realize the adjustment of the damping coefficient by utilizing the temperature change, namely the damping liquid with the density changing along with the temperature change is filled in the shell of the inclination angle sensor, namely the damping coefficient of the inclination angle sensor can change along with the temperature change, the temperature change of the inclination angle sensor is controlled along with the measurement output of the vibration sensor such as the MEMS micro accelerometer or the piezoelectric vibration sensor, and the vibration sensor outputs different functions according to the amplitude of the external vibration, so that the heating resistor loop is in different working states to generate different temperatures, thereby achieving the purpose of modulating the damping ratio of the inclination angle sensor.
Preferably, the bottom of the shell is an elastic piece. The elastic piece can deform according to the volume change of damping liquid in the shell at different temperatures, and stress generated by the volume change of the damping liquid is released, so that the pressure inside the inclination angle sensor is kept unchanged.
Preferably, the magnetic steel component comprises a magnetic pole cap, magnetic steel and a magnetic ring, wherein the magnetic pole cap is connected with the top of the magnetic steel, and the magnetic ring is sleeved outside the magnetic steel. The applicant researches find that the influence of magnetic leakage on the uniformity of a working air gap magnetic field can be reduced by introducing a magnetic locking ring to restrict a magnetic circuit aiming at the magnetic leakage problem caused by abrupt change of the magnetic resistance of the bonding surface of the magnetic steel and the yoke assembly, and the improved design does not influence a main magnetic circuit and is compatible with the existing assembly process.
The basic structure and its components except the improved structure of the tilt sensor of the present invention all adopt corresponding components in the prior art, and the structure, position and connection relation of the corresponding components are not described in detail, and reference may be made to CN101592678a and the like.
The principle of the tilt sensor in this embodiment will be briefly described as follows:
The inclination sensor comprises a shell, a vibration sensor, a sensitive component, an upper yoke component, a lower yoke component, a temperature sensor, a heating resistor loop, a magnetic steel component, a servo circuit board component, a temperature circuit board component and a connecting cable, wherein the circuit and the signal transmission connection can be connected through the connecting cable.
The vibration sensor may be a MEMS micro accelerometer or a piezoelectric vibration sensor, and the sensitive component in this embodiment includes two coils and a quartz pendulum piece, and the upper and lower yoke components include an upper yoke component and a lower yoke component, each of which includes a yoke and a permanent magnet.
The shell is filled with damping liquid with damping ratio changing along with temperature change, the middle quartz swinging piece is made of fused quartz, two coils of the sensitive component are overlapped with the center position of the quartz swinging piece, the sensitive component is pressed together by an upper torquer and a lower torquer, a permanent magnet penetrates through the coils, the upper yoke component, the lower yoke component and the sensitive component form the torquer, a glass insulator is arranged on the upper yoke component, an electric signal of the sensitive component is output through the glass insulator, current of the coils is injected through the glass insulator, a temperature sensor is attached to the upper yoke component, and the temperature of the sensitive component is tested. When acceleration is input, the sensitive component of the inclination angle sensor can displace, so that the capacitance formed between the sensitive component and the upper yoke iron component and the lower yoke iron component is changed, the change is converted into an electric signal through the servo circuit board component, the electric signal is converted into a current signal through the power amplifier after servo amplification and correction, and the current signal is fed back to the moment coil to generate feedback moment, so that the sensitive component is restored to the initial balance position. The amplitude of the output current of the power amplifier and the amplitude of the acceleration change are in approximate linear relation, so that the change of the acceleration and the change of the inclination angle can be obtained by measuring the voltage on the sampling resistor. The inclination sensor of the invention firstly works at a constant temperature, the vibration sensor tests the external vibration environment, the heating resistor loop is controlled to work through the signal processing of the temperature circuit board assembly, and the heating resistor loop control circuit generates different output functions according to different vibration conditions, so that the heating resistor loop generates different output functions, and the damping liquid in the shell is at different working temperatures. The damping coefficient of the damping liquid in the shell can be changed according to different temperature changes, so that liquid damping modulation is realized.
In the embodiment of the invention, the damping coefficient of the damping liquid is related to the temperature change of the damping liquid.
In the embodiment of the invention, the sensitive component is filled with liquid silicone oil as a connecting material of the sensitive component corresponding to the mechanical sensitive element. Liquid silicone oil generally refers to a linear polysiloxane product which is kept in a liquid state at room temperature, and a sensitive component adhesive is used as a connecting material of a core mechanical sensitive element, and is inevitably subjected to the combined action of surrounding environments such as temperature, humidity, stress and the like in the storage process, so that aging and characteristic parameter change occur. According to the invention, the traditional adhesive is improved, liquid silicone oil is used for replacement, and the quartz pendulous reed in the sensitive component is wrapped by the liquid silicone oil after replacement, so that the vitrification transformation temperature of the quartz pendulous reed is improved, and the environmental adaptability and the storage stability of the inclination sensor are further improved.
In the embodiment of the invention, the bottom of the shell is an elastic piece. The elastic piece can be a corrugated piece or a spring piece, the corrugated piece can deform according to the volume change of damping liquid in the shell at different temperatures, and the stress generated by the volume change of the damping liquid is released, so that the pressure in the inclination sensor is kept unchanged.
In the embodiment of the invention, the magnetic steel component comprises a magnetic pole cap, magnetic steel and a magnetic ring, wherein the magnetic pole cap is connected with the top of the magnetic steel, and the magnetic ring is sleeved outside the magnetic steel. Aiming at the problem of magnetic leakage caused by abrupt change of magnetic resistance of the bonding surface of the magnetic steel and the yoke assembly, the magnetic circuit is restrained by introducing the magnetic locking ring, so that the influence of the magnetic leakage on the uniformity of the working air gap magnetic field is reduced. The improved design does not affect the main magnetic circuit and is compatible with the existing assembly process. By performing magnetic circuit magnetic flux simulation, the magnetic leakage at the root of the magnetic steel is restrained (the magnetic leakage coefficient of the non-magnetic ring structure=1.263; the magnetic leakage coefficient of the magnetic ring structure=1.217) by comparing the non-locking magnetic ring with the magnetic circuit of the magnetic ring with the locking magnetic ring, and the magnetic leakage is reduced by about 4%.
In the embodiment of the invention, when the inclination angle sensor enters a working state, the temperature of the inclination angle sensor is firstly increased to be higher than the ambient temperature through the heating resistor, the temperature is stabilized in a certain range, and when the vibration sensor tests external vibration, the internal temperature of the inclination angle sensor can be changed to realize the modulation of output stability. When the external vibration power is high, the heating resistor stops working, so that the temperature is reduced, the damping coefficient of the internal liquid is improved, and the output anti-interference capability and stability of the inclination angle sensor are improved; when the external vibration power is smaller, the temperature is increased, the damping coefficient of the internal liquid is reduced, and the output sensitivity of the inclination angle sensor is improved.
The tilt sensor adopts an integrated embedded liquid damping modulation technical means to realize static or quasi-static test of the carrier tilt under the vibration interference of a broadband. The invention provides a liquid damping modulation mode, which enables the system damping parameters of the tilt sensor to be adaptively modulated according to the change of the vibration environment, enables the internal working temperature of the tilt sensor to be changed within a certain range, reduces the influence of the vibration error on the measurement precision of the tilt sensor under the vibration interference of a broadband, and improves the environmental adaptability and the reliability of the tilt sensor.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. An apparatus for testing performance of an inclination sensor, the apparatus comprising:
a mechanical table body and an electric control system; the mechanical table body comprises: a pitch assembly, a roll assembly, a vibration assembly, and a measurement assembly; the electric control system is used for controlling the testing process of the inclination sensor based on the mechanical table body, obtaining measurement data, and calculating and outputting measurement results; the pitching assembly is used for completing pitching angle rotation of the inclination sensor; the rolling assembly is connected with the pitching assembly, the vibration assembly and the measuring assembly, and is used for completing rolling angle rotation of the inclination sensor; the vibration assembly is used for providing a vibration environment for the inclination sensor; the measuring component is used for measuring vibration data of the inclination sensor.
2. The device for testing the performance of an inclination sensor according to claim 1, wherein the pitch assembly comprises:
The two ends of the U-shaped frame are respectively provided with a driving end and an angle measuring end; the driving end is provided with a rotating shaft, the rotating shaft is matched with a bearing to be installed in a bearing seat of the U-shaped frame to form a rotating shaft system, a motor rotating part is installed on the rotating shaft, a motor fixing part is installed in the U-shaped frame, the tail end of the rotating shaft system is covered by a first outer cover, and the motor is used for rotating based on the control of an electric control system;
The angle measuring end is provided with a rotary shaft, the rotary shaft is connected with the rotary shaft, the rotary shaft is matched with a bearing to be installed in a bearing seat of the U-shaped frame to form a rotary shaft system, a first electromagnetic brake and an angle sensor in the angle measuring end are installed on the rotary shaft, and the tail end of the rotary shaft system is covered by a second housing; the first electromagnetic brake is used for locking the rotary shaft system based on the control of the electric control system, and the angle sensor is used for measuring the angle rotation data of the rotary shaft.
3. The device for testing the performance of the tilt sensor according to claim 2, wherein the driving end is provided with a wiring board and a rotation limiting block for wiring and mechanical limiting of the electrical appliance.
4. The apparatus for testing the performance of an inclination sensor of claim 1 wherein the roll assembly comprises:
The device comprises a rolling motor, a rolling shaft, a motor mounting bracket, a second electromagnetic brake, a rolling bearing supporting box body, a rolling counterweight and a pitching counterweight;
The rolling motor is installed in the motor installing support, the rolling motor is connected with one end of the rolling shaft, the other end of the rolling shaft passes through the rolling bearing supporting box body and then is connected with the vibration assembly installing flange, the second electromagnetic brake is installed on the rolling motor, the pitching balancing weight is installed on the motor installing support, the motor installing support is fixedly connected with the rolling bearing supporting box body, the pitching shaft installing flange is arranged on the rolling bearing supporting box body, the measuring assembly installing flange is arranged on the rolling shaft, and the rolling balancing weight is installed on the vibration assembly.
5. The apparatus for testing the performance of an inclination sensor according to claim 1, wherein the vibration assembly comprises:
The vibration device comprises a vibrating arm, a vibrating bracket, a follower arm bracket, an electromagnetic vibration exciter and a laser vibration meter;
The vibrating arm front end is used for installing the measured object, the vibrating arm rear end is connected with the roll subassembly, the vibrating bracket front end is connected with electromagnetic vibration exciter, electromagnetic vibration exciter is used for providing vibration environment for the vibrating arm, the vibrating bracket rear end is connected with the roll subassembly, the follower arm front end is connected with the follower arm bracket front end, the follower arm bracket rear end is connected with the roll subassembly, the measuring assembly is installed on the follower arm, the measuring assembly is used for measuring the vibration data of measured object.
6. The apparatus for testing the performance of the tilt sensor according to claim 1, wherein the measuring assembly comprises 3 laser vibrometers.
7. The apparatus for testing performance of an inclination sensor according to claim 1, wherein said inclination sensor comprises: the sensor comprises a shell, and a sensitive assembly, an upper yoke assembly, a lower yoke assembly, a magnetic steel assembly, a servo circuit board assembly and a connecting cable which are arranged in the shell, wherein the inclination sensor further comprises a sensor body arranged in the shell: the device comprises a vibration sensor, a temperature sensor, a heating resistor loop, a temperature circuit board assembly and a connecting cable; the temperature sensor is used for detecting the temperature of damping liquid in the shell and transmitting detected temperature information to the temperature circuit board assembly; the heating resistor loop is used for heating damping liquid in the shell; the vibration sensor is used for collecting external vibration environment data of the inclination sensor and transmitting the external vibration environment data to the temperature circuit board assembly; the temperature circuit board assembly is used for controlling the output power of the heating resistor loop based on external vibration environment data and temperature information.
8. A method of testing a device for testing performance of an inclination sensor according to any one of claims 1 to 7, said method comprising:
Step 1: powering on the device, and installing an inclination sensor on the device;
step 2: the pitching component and the rolling component rotate to find a zero position;
step 3: the electronic control system sends a control instruction to control the pitching assembly to rotate to a first preset angle;
Step 4: the electronic control system sends a control instruction to control the rolling assembly to rotate to a second preset angle;
Step 5: the electronic control system sends a control instruction to control the vibration assembly to vibrate;
step 6: the measuring component is used for measuring vibration data of the inclination sensor.
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| CN118500445B (en) | 2024-09-20 |
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