CN110187146A - A kind of shock accelerometer calibrating installation and method - Google Patents
A kind of shock accelerometer calibrating installation and method Download PDFInfo
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- CN110187146A CN110187146A CN201910627954.8A CN201910627954A CN110187146A CN 110187146 A CN110187146 A CN 110187146A CN 201910627954 A CN201910627954 A CN 201910627954A CN 110187146 A CN110187146 A CN 110187146A
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- 230000035939 shock Effects 0.000 title claims abstract description 158
- 238000009434 installation Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 32
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- 238000012360 testing method Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 10
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- 230000001133 acceleration Effects 0.000 claims description 38
- 230000035945 sensitivity Effects 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
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Classifications
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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
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
It includes: laser interference system, temperature control system, system excited by impact and data collector that a kind of shock accelerometer calibrating installation and method, the device are provided in the embodiment of the present invention；Wherein, laser interference system includes: the laser interferometer connecting with data collector；Temperature control system includes: for carrying the chamber of shock accelerometer, the temperature sensor being set in chamber, the heating part for adjusting test the temperature inside the box and refrigeration section, the switching circuit for gating heating part or refrigeration section and the temperature controller connecting with temperature sensor, heating part and switching circuit；System excited by impact includes: the calibrating installation being set in chamber, the impact hammering block for being arranged in calibrating installation, forces in the percussion mechanism impacted on hammering block.It may be implemented under high/low temperature scene using the scheme in the embodiment of the present invention, the calibration to impact accelerometer response.
Description
Technical field
The present invention relates to impact measurement technologies, and in particular, to a kind of shock accelerometer calibrating installation and method.
Background technique
Shock accelerometer is widely used in links during the scientific research, production and test of defence and military, various
The function of monitoring and test is responsible under environmental condition.The sensing element majority of shock accelerometer is by piezoelectric material structure at present
At according to the characteristic of piezoelectric material, when it works other than reference work temperature, its output charge sensitivity will be generated very
Big variation, then temperature change can be very big on the sensitivity of the accelerometer of piezo type influence.Above-mentioned reference work temperature can
Think room temperature.
It, must be to impact in use process due to can not ignore under high and low temperature environment by the test error that temperature introduces
The sensitivity of accelerometer is modified.But the calibration of shock accelerometer is all to carry out at normal temperature at present, calibration
Mode is all the shock accelerometer that will be calibrated and reference shock accelerometer by being mounted on shock calibration platform back-to-back,
It since shock calibration platform operating temperature range is relatively narrow, can not work, calibrating installation cannot be integrally put under high and low temperature environment
In high-temperature test chamber, therefore the calibration of the impact acceleration under high/low temperature cannot achieve using the calibration method of this structure type.
Summary of the invention
A kind of shock accelerometer calibrating installation and method are provided in the embodiment of the present invention, solve school in the prior art
Standard apparatus cannot achieve the problem of calibrating to the impact acceleration under high/low temperature.
First aspect according to an embodiment of the present invention, provides a kind of shock accelerometer calibrating installation, and feature exists
In, comprising: laser interference system, temperature control system, system excited by impact and data collector；Wherein,
Laser interference system includes: the laser interferometer connecting with data collector；
Temperature control system includes: for carrying the chamber of shock accelerometer, the temperature being set in chamber biography
Sensor, for adjust test the temperature inside the box heating part and refrigeration section, the switching circuit for gating heating part or refrigeration section, with
And the temperature controller being connect with temperature sensor, heating part and switching circuit；
System excited by impact includes: the calibrating installation being set in chamber, the impact hammering block for being arranged in calibrating installation, applies
Power is in the percussion mechanism on impact hammering block.
The second aspect according to an embodiment of the present invention provides a kind of shock accelerometer calibration method, is applied to upper
The shock accelerometer calibrating installation stated, which is characterized in that shock accelerometer calibration method includes:
Obtain the calibration command to shock accelerometer；
According to calibration command, temperature adjustment instructions are sent to temperature controller, so that temperature controller control switch circuit
Gate the temperature in heating part or refrigeration section Adjustment Tests case；
When temperature in chamber is in preset temperature range, the light focusing that adjustment laser interferometer issues is in impact
The surface of accelerometer, and adjust the impact acceleration that system excited by impact is applied on shock accelerometer；
According to laser interferometer measurement to the impact magnitude being applied on shock accelerometer and shock accelerometer
Suffered impact acceleration resolves the sensitivity of the shock accelerometer in preset temperature range.
Using the shock accelerometer calibrating installation and method provided in the embodiment of the present invention, needing to impact acceleration
When meter carries out sensitivity calibration, shock accelerometer to be calibrated is placed in chamber, is opened by temperature controller control
Powered-down road gating heating part or refrigeration section further control laser interferometer and apply to realize the adjustment to test the temperature inside the box
The impact magnitude and system excited by impact being added on shock accelerometer are to the impact dynamics of shock accelerometer, according to impact
Magnitude and impact dynamics, resolve the sensitivity of the shock accelerometer in preset temperature range, can be achieved to add impact in this way
The high/low temperature sensitivity absolute calibration of speedometer.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the configuration diagrams of the shock accelerometer calibrating installation of the embodiment of the present invention；
Fig. 2 indicates the structural schematic diagram of the system excited by impact of the embodiment of the present invention；
Fig. 3 indicates the flow diagram of the shock accelerometer calibration method of the embodiment of the present invention；
Wherein, in figure:
1, shock accelerometer, 2, pipeline, 3, pressure regulator, 4, valve, 5, impact ball, 6, constraint pad, 7, additional mass, 8,
Shock waveform generator, 9, compressed air source.
Specific embodiment
In the implementation of the present invention, it is found by the applicant that due to being by the test error that temperature introduces under high and low temperature environment
It can not ignore, the sensitivity of shock accelerometer must be modified in use process.But current shock accelerometer
Calibration be all to carry out at normal temperature, the mode of calibration be all the shock accelerometer that will be calibrated with reference to impact acceleration
Meter, can not be in high/low temperature ring since shock calibration platform operating temperature range is relatively narrow by being mounted on shock calibration platform back-to-back
Work, calibrating installation cannot be integrally put into high-temperature test chamber under border, thus using this structure type calibration method without
Method realizes the impact acceleration calibration under high/low temperature.
In view of the above-mentioned problems, providing a kind of shock accelerometer calibrating installation and method in the embodiment of the present invention, needing
When carrying out sensitivity calibration to shock accelerometer, shock accelerometer to be calibrated is placed in chamber, temperature is passed through
It spends controller control switch circuit gating heating part or refrigeration section is further controlled with realizing to the adjustment of test the temperature inside the box
The impact magnitude and system excited by impact that laser interferometer processed is applied on shock accelerometer rush shock accelerometer
Dynamics is hit, according to impact magnitude and impact dynamics, resolves the sensitivity of the shock accelerometer in preset temperature range, in this way
The high/low temperature sensitivity absolute calibration to shock accelerometer can be achieved.
Scheme in the embodiment of the present invention can be realized using various computer languages, for example, the program of object-oriented is set
Count language Java and literal translation formula scripting language JavaScript etc..
It is to be appreciated that in the description of the present invention, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
The instructions such as " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is at least two, such as two
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate with each other；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the interaction relationship of connection or two elements inside two elements.For the ordinary skill in the art,
The specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference letter,
This repetition is for purposes of simplicity and clarity, itself not indicate between discussed various embodiments and/or setting
Relationship.In addition, the present invention provides various specific techniques and material example, but those of ordinary skill in the art can be with
Recognize the application of other techniques and/or the use of other materials.
In order to which technical solution in the embodiment of the present invention and advantage is more clearly understood, below in conjunction with attached drawing to the present invention
Exemplary embodiment be described in more detail, it is clear that described embodiment is only that a part of the invention is implemented
Example, rather than the exhaustion of all embodiments.It should be noted that in the absence of conflict, embodiment and reality in the present invention
The feature applied in example can be combined with each other.
The embodiment of the invention provides a kind of shock accelerometer calibrating installations, as shown in Figure 1, the device includes: laser
Interference system, temperature control system, system excited by impact and data collector；Wherein, the laser interference system is for liquidating
Accelerometer polishing is hit, by light focusing in the surface of shock accelerometer, optical path is adjusted and is allowed to interfere.System excited by impact
System is for applying impact force acceleration to shock accelerometer.Data collector is for acquiring laser interference system, excited by impact
The analog signal of the outputs such as system and stimulated light interference system and the shock accelerometer of system application excited by impact effect,
And the calibration software and control system of digital signal input computer are converted analog signals into, to measure shock accelerometer
Standard value.Wherein, computer is for sending instruction, carrying out data analysis and processing, to realize the functions such as automatic calibration.Temperature control
System processed is used to control the temperature in shock accelerometer calibration process.Specifically,
Laser interference system includes: the laser interferometer connecting with data collector.Wherein, laser interferometer is for liquidating
It hits accelerometer and applies impact polishing, by light focusing in the surface of shock accelerometer, adjust optical path and be allowed to interfere.
Temperature control system includes: for carrying the chamber of shock accelerometer, the temperature being set in chamber biography
Sensor, for adjust test the temperature inside the box heating part and refrigeration section, the switching circuit for gating heating part or refrigeration section, with
And the temperature controller being connect with temperature sensor, heating part and switching circuit.Specifically, the school of temperature controller and computer
Quasi- software is connected with control system, and temperature controller exports the first signal when receiving high temperature calibration command, to switching circuit,
So that switching circuit gates heating part, wherein heating part may be disposed at test for the uniformity of temperature profile in guarantee test case
On the inner wall of case surrounding, chamber temperature under the heat effect of heating part rises, the temperature sensor being set in chamber
The temperature in experimental box can be acquired in real time and feeds back to temperature controller, when temperature controller judges that the temperature in chamber reaches
Calibration temperature indicated by high temperature calibration command and when continuing preset time, control switch circuit shutdown, that is, neither gating heating
Portion does not gate refrigeration section again.Alternatively, temperature controller when receiving low-temperature calibration instruction, is believed to switching circuit output second
Number, so that switching circuit gates refrigeration section, wherein for the uniformity of temperature profile in guarantee test case, refrigeration section also be may be disposed at
On the inner wall of chamber surrounding, chamber temperature under the cooling effect of refrigeration section declines, and the temperature being set in chamber passes
Sensor can acquire the temperature in experimental box in real time and feed back to temperature controller, when temperature controller judges the temperature in chamber
When reaching the indicated calibration temperature of low-temperature calibration instruction and continuing preset time, control switch circuit shutdown, that is, neither gate
Heating part does not gate refrigeration section again.In this way, temperature control system can provide the temperature environment of calibration for shock accelerometer.Its
In, test the temperature inside the box reaches calibration temperature and continues preset time, it is ensured that environment temperature is uniform in experimental box, it is also ensured that
The temperature for reaching sensing unit inside shock accelerometer reaches calibration temperature.Specifically, heating part includes: to be set to chamber
Heater strip on inner wall, heater strip are connect with temperature controller, and temperature controller is controllable to heater strip and is powered to realize heating.
Refrigeration section can be compressor, such as may include: the liquid nitrogen compressor connecting with switching circuit.Gate refrigeration section or heating part
Switch relay form can be used, correspondingly, switching circuit may include relay, and relay includes solenoid valve, solenoid valve
Control terminal connect with temperature controller, the input terminal of solenoid valve is connected to liquid nitrogen compressor, the output end of solenoid valve and test
Case connection.Wherein, the gas passage in chamber in settable connection case outside case, the refrigerant gas that liquid nitrogen compressor generates can lead to
Gas passage on overtesting case enters in chamber, to reduce temperature.Optionally, gas passage may include surrounding in chamber
The blowing mouth of wall setting.
System excited by impact include: the calibrating installation being set in chamber, the impact hammering block being arranged in calibrating installation,
Force in the percussion mechanism on impact hammering block.Wherein, shock accelerometer to be calibrated is fixed on calibrating installation, percussion mechanism
It is set to outside chamber, percussion mechanism applies impact force to impact hammering block, and impact hammering block is arranged in calibrating installation, in impact force
Under the action of generate impact force acceleration and conduct on shock accelerometer.That is, system excited by impact is for generating
To the impact signal of shock accelerometer.Optionally, calibrating installation can impact hammering block for stopping to stop limiting device
Impact acceleration, and limit the position of shock accelerometer.
The calibration temperature of shock accelerometer, the environment in chamber are adjusted and controlled in this way by temperature control system
When temperature reaches desired calibration temperature and continues preset time, then laser interference system and system excited by impact are controlled to impact
The calibration of accelerometer is may be implemented in this way under high/low temperature scene, to the accurate alignment of impact accelerometer response.
Optionally, as shown in Figure 1, in some embodiments of the invention, laser interference system further include: be set to data
Photoelectric converter between collector and laser interferometer, the optical signal that photoelectric converter is used to issue laser interferometer are converted
For electric signal, to export to data collector.
Optionally, impact acceleration calibrating installation further include: for adjusting the suitable tune amplification of shock accelerometer output
Device, modification amplifier are connect with data collector.As shown in Figure 1, the output of shock accelerometer is connect with modification amplifier, fit
The other end of amplifier is adjusted to connect with data collector, the output of shock accelerometer is amplified place by such modification amplifier
It manages and exports to data collector.
In some embodiments of the invention, percussion mechanism includes: the gas big gun impactor being set to below impact hammering block, with
The impact controller of gas big gun impactor connection, and the compressed air source 9 being connected to impact controller.
Wherein, it as shown in Fig. 2, gas big gun impactor includes: the pipeline 2 being connected to compressed air source, is set on pipeline 2
Pressure regulator 3 and valve 4, the impact ball 5 being set to inside pipeline 2, and the compressed air source 9 being connected to pipeline 2, compressed air
The air that source 9 exports forms air pressure under the limitation of pipeline 2, pushes impact ball 5 under the influence of air pressure along the extension side of pipeline 2
To movement.
Wherein, impact hammering block includes: the constraint pad 6 for fixing shock accelerometer 1, is set to 6 lower section of constraint pad
Additional mass 7 is arranged in additional mass 7 and constrains the shock waveform generator 8 inside pad 6, the impact force action of percussion mechanism
In on shock waveform generator 8.Wherein, constraint pad 6 can be cushion, to protect shock accelerometer.
In this way, when needing to calibrate shock accelerometer, the pact that shock accelerometer is placed in chamber
On beam pad, the calibration software or control system of computer send calibration command to temperature controller, and calibration command middle finger is shown with school
Quasi- temperature, temperature controller are that heater strip is powered to realize the heating to chamber, or according to calibration temperature according to calibration temperature
Liquid nitrogen compressor is opened to realize the cooling to chamber.When the temperature in chamber reaches calibration temperature and lasting preset time
Afterwards, the light focusing that adjustment laser interferometer issues is in the surface of shock accelerometer, while impact controller control compression is empty
The air of gas source delivery air, output forms air pressure under the restriction effect of pipeline, to drive the piston upwards in pipeline,
To drive shock waveform generator to pass through additional mass and constraint pad arrival shock accelerometer, formed to shock accelerometer
Impact acceleration is achieved under high/low temperature scene, the calibration to impact accelerometer response.
In addition, another embodiment of the present invention additionally provides a kind of shock accelerometer calibration method, it is applied to above-mentioned reality
The shock accelerometer calibrating installation in example is applied, as shown in figure 3, method includes the following steps:
Step 31: obtaining the calibration command to shock accelerometer.
Wherein, calibration command can be user operated on calibrating installation generate, be also possible to computer software and
Control system triggering generates.
Step 32: according to calibration command, temperature adjustment instructions are sent to temperature controller, so that temperature controller control is opened
Temperature in powered-down road gating heating part or refrigeration section Adjustment Tests case.
It may include the information for indicating preset temperature range in calibration command, instruction preset temperature alternatively referred to as calibrates temperature.
Wherein, step 32 includes following two scene:
Scene one, when calibration command instruction carries out high temperature calibration to shock accelerometer, send the to temperature controller
One temperature adjustment instructions, so that the temperature in chamber is turned up in temperature controller control switch circuit gating heating part.
Alternatively,
Scene two, when calibration command instruction carries out low-temperature calibration to shock accelerometer, send the to temperature controller
Two temperature adjustment instructions, so that temperature controller control switch circuit gating refrigeration section turns down the temperature in chamber.
Wherein, the mode of heating part or refrigeration section Adjustment Tests the temperature inside the box can refer to above-mentioned calibrating installation embodiment, therefore
It is not repeating herein.
Step 33: when temperature in chamber is in preset temperature range, the light that adjustment laser interferometer issues is poly-
Coke adjusts the impact acceleration that system excited by impact is applied on shock accelerometer in the surface of shock accelerometer.
Wherein, adjustment laser interferometer issue light focusing in shock accelerometer surface be in order to adjust optical path, with
Generate interference.The step of adjusting the impact acceleration that system excited by impact is applied on shock accelerometer may include: to open
Compressed air source and impact controller, set air pressure, and driving piston moves in pipeline.It is applied alternatively, adjusting system excited by impact
The step of impact acceleration being added on shock accelerometer can also include: the air pressure for adjusting piston, drive piston in pipeline
Middle movement.
Wherein, step 33 includes: temperature in chamber in preset temperature range and when continuing preset time, is adjusted
The light focusing that whole laser interferometer issues adjusts system excited by impact and is applied to impact and add in the surface of shock accelerometer
Impact acceleration on speedometer.Temperature in guarantee test case is in preset temperature range and continues preset time, and one can be with
Uniformity of temperature profile in guarantee test case, two can guarantee the temperature that the sensing unit inside shock accelerometer is touched
It is almost the same with the temperature in chamber.Optionally, preset time can be set to 13~20 minutes.
Step 34: according to laser interferometer measurement to shock accelerometer on impact magnitude and shock accelerometer
Suffered impact acceleration resolves the sensitivity of the shock accelerometer in preset temperature range.
Wherein, laser interferometer measurement is applied to the impact magnitude of shock accelerometer, exports analog electrical signal.Chamber
In shock accelerometer by the electric signal and output for generating simulation after impact acceleration.
Wherein, step 34 include: to laser interferometer measurement to the impact magnitude being applied on shock accelerometer with
And impact acceleration suffered by shock accelerometer carries out analog-to-digital conversion, obtains corresponding digital signal；According to digital signal,
Resolve the sensitivity of the shock accelerometer in preset temperature range.Specifically, laser interferometer measurement is applied to impact and accelerates
The impact magnitude of meter is spent, analog electrical signal is exported to data collector, digital signal is converted by data collector and is inputted
Computer；Shock accelerometer in chamber by the electric signal for generating simulation after impact acceleration and is exported to data acquisition
Device is converted into digital signal by data collector and inputs computer.The calibration software and control system of computer are according to this
Two paths of signals resolves the sensitivity of the shock accelerometer in preset temperature range.
Further, after step 34 further include: according to the sensitivity of shock accelerometer within the scope of different temperatures, really
Determine the Sensitivity magnitude linearity of shock accelerometer at different temperature.The calibration in chamber can be changed by step 32
Temperature, circulation step 32 to step 34 can calculate the Sensitivity magnitude linearity under different temperatures, obtain temperature-Sensitivity magnitude
Dependent linearity degree.
Further, after step 34 further include: according to the sensitivity of shock accelerometer under different impact accelerations, really
Determine the Sensitivity magnitude linearity of the shock accelerometer under different impact accelerations.Impact acceleration can be changed by step 33
The impact acceleration being subject to is counted, it is linear that circulation step 33 to step 34 can calculate Sensitivity magnitude under different impact accelerations
Degree, obtains impact acceleration-Sensitivity magnitude dependent linearity degree.
Sensitivity magnitude under comprehensive different temperatures, different impact accelerations, it is sensitive to can be obtained temperature-impact acceleration-
Spend the dependent linearity degree of amplitude.
When needing to calibrate shock accelerometer, the constraint pad that shock accelerometer is placed in chamber
On, the calibration software or control system of computer send calibration command to temperature controller, and calibration command middle finger is shown with calibration temperature
Degree, temperature controller are that heater strip is powered to realize the heating to chamber, or is opened according to calibration temperature according to calibration temperature
Liquid nitrogen compressor is to realize the cooling to chamber.After the temperature in chamber reaches calibration temperature and continues preset time,
The light focusing of laser interferometer sending is adjusted in the surface of shock accelerometer, while impact controller controls compressed air source
The air of delivery air, output forms air pressure under the restriction effect of pipeline, to drive the piston upwards in pipeline, to drive
Dynamic shock waveform generator passes through additional mass and constraint pad reaches shock accelerometer, forms the impact to shock accelerometer
Acceleration, when shock accelerometer is by impact acceleration, the shock accelerometer in chamber experiences impact acceleration
And analog electrical signal input data collector is generated, laser interferometer measurement is applied to the impact magnitude on shock accelerometer,
Also output analog electrical signal is to data collector, and the analog signal that data collector receives from from laser interferometer is as base
Calibration signal, the analog signal received from from shock accelerometer carry out modulus as signal to be calibrated, to both signals
Conversion, to calculate the sensitivity of shock accelerometer.The calibrating mode considers influence of the temperature to shock accelerometer,
It may be implemented under high/low temperature scene, the calibration to impact accelerometer response.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (16)
1. a kind of shock accelerometer calibrating installation characterized by comprising laser interference system, temperature control system, impact
Excitation system and data collector；Wherein,
The laser interference system includes: the laser interferometer connecting with the data collector；
The temperature control system includes: the temperature for carrying the chamber of shock accelerometer, being set in the chamber
Spend sensor, the heating part for adjusting described test the temperature inside the box and refrigeration section, for gating the heating part or the system
The switching circuit in cold portion and the temperature controller being connect with the temperature sensor, the heating part and the switching circuit；
The system excited by impact includes: the calibrating installation being set in the chamber, is arranged in rushing for the calibrating installation
It hits hammering block, force in the percussion mechanism on the impact hammering block.
2. shock accelerometer calibrating installation according to claim 1, which is characterized in that the laser interference system also wraps
It includes:
The photoelectric converter being set between the data collector and the laser interferometer.
3. shock accelerometer calibrating installation according to claim 1, which is characterized in that further include:
For adjusting the modification amplifier of the shock accelerometer output, the modification amplifier and the data collector connect
It connects.
4. shock accelerometer calibrating installation according to claim 1, which is characterized in that the percussion mechanism includes:
Gas big gun impactor is set to below the impact hammering block；
Impact controller is connect with the gas big gun impactor；
Compressed air source is connected to the impact controller.
5. shock accelerometer calibrating installation according to claim 4, which is characterized in that the gas big gun impactor includes:
The pipeline being connected to the compressed air source；
The pressure regulator and valve being set on the pipeline；
It is set to the impact ball of the channel interior, the impact ball under the influence of air pressure can be along the extending direction of the pipeline
Movement.
6. shock accelerometer calibrating installation according to claim 1, which is characterized in that the impact hammering block includes:
For fixing the constraint pad of the shock accelerometer；
It is set to the additional mass of constraint pad lower section；
The shock waveform generator being arranged in inside the additional mass and the constraint pad, the impact masterpiece of the percussion mechanism
For the shock waveform generator.
7. shock accelerometer calibrating installation according to claim 1, which is characterized in that the heating part includes: setting
Heater strip on the test chamber interior wall, the heater strip are connect with the temperature controller.
8. shock accelerometer calibrating installation according to claim 1, which is characterized in that the refrigeration section includes: and institute
State the liquid nitrogen compressor of switching circuit connection.
9. shock accelerometer calibrating installation according to claim 1, which is characterized in that the switching circuit includes relay
Device, the relay include solenoid valve.
10. shock accelerometer calibrating installation according to claim 1, which is characterized in that the calibrating installation is to stop
Limiting device.
11. a kind of shock accelerometer calibration method is applied to such as the described in any item shock accelerometers of claim 1~10
Calibrating installation, which is characterized in that the shock accelerometer calibration method includes:
Obtain the calibration command to the shock accelerometer；
According to the calibration command, Xiang Suoshu temperature controller sends temperature adjustment instructions, so that the temperature controller controls
The switching circuit gates the heating part or refrigeration section adjusts the temperature in the chamber；
When temperature in the chamber is in preset temperature range, adjust light focusing that the laser interferometer issues in
The surface of the shock accelerometer, and adjust the impact that the system excited by impact is applied on the shock accelerometer and add
Speed；
According to the laser interferometer measurement to the shock accelerometer on impact magnitude and the impact acceleration
The suffered impact acceleration of meter, resolves the sensitivity of the shock accelerometer in the preset temperature range.
12. shock accelerometer calibration method according to claim 11, which is characterized in that according to the laser interferometer
Impact acceleration suffered by the impact magnitude on the shock accelerometer measured and the shock accelerometer, solution
Calculate in the preset temperature range the step of sensitivity of the shock accelerometer after, further includes:
According to the sensitivity of shock accelerometer described within the scope of different temperatures, determine the shock accelerometer in different temperature
The Sensitivity magnitude linearity under degree.
13. shock accelerometer calibration method according to claim 11, which is characterized in that according to the laser interferometer
Impact acceleration suffered by the impact magnitude on the shock accelerometer measured and the shock accelerometer, solution
Calculate in the preset temperature range the step of sensitivity of the shock accelerometer after, further includes:
According to the sensitivity of shock accelerometer described under different impact accelerations, determine the shock accelerometer in different punchings
Hit the Sensitivity magnitude linearity under acceleration.
14. shock accelerometer calibration method according to claim 11 or 12, which is characterized in that referred to according to the calibration
It enables, Xiang Suoshu temperature controller sends temperature adjustment instructions, so that the temperature controller controls the switching circuit and gates institute
State heating part or the step of refrigeration section adjusts the temperature in the chamber, comprising:
When calibration command instruction carries out high temperature calibration to the shock accelerometer, Xiang Suoshu temperature controller sends the
One temperature adjustment instructions, so that the temperature controller controls the switching circuit and gates the heating part height-regulating chamber
Interior temperature；
Alternatively,
When calibration command instruction carries out low-temperature calibration to the shock accelerometer, Xiang Suoshu temperature controller sends the
Two temperature adjustment instructions, so that the temperature controller controls the switching circuit gating refrigeration section and turns down the chamber
Interior temperature.
15. shock accelerometer calibration method according to claim 11 or 12, which is characterized in that in the chamber
Temperature in preset temperature range when, adjust light focusing that the laser interferometer issues in the shock accelerometer
Surface, and adjust the step of system excited by impact is applied to the impact acceleration stated on shock accelerometer, comprising:
Temperature in the chamber adjusts the laser interferometer in preset temperature range and when continuing preset time
The light focusing of sending in the surface of the shock accelerometer, and adjust the system excited by impact be applied to it is described impact plus
Impact acceleration on speedometer.
16. shock accelerometer calibration method according to claim 11 or 12, which is characterized in that dry according to the laser
Impact suffered by interferometer measures on the shock accelerometer impact magnitude and the shock accelerometer accelerates
Degree resolves in the preset temperature range the step of sensitivity of the shock accelerometer, comprising:
To the laser interferometer measurement to the shock accelerometer on impact magnitude and the impact accelerate
The suffered impact acceleration of degree meter carries out analog-to-digital conversion, obtains corresponding digital signal；
According to the digital signal, the sensitivity of the shock accelerometer in the preset temperature range is resolved.
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Cited By (1)
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| CN112415228A (en) * | 2020-11-18 | 2021-02-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | Step acceleration calibrating device based on shock tube |
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