CN208043749U - A kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device - Google Patents
A kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device Download PDFInfo
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- CN208043749U CN208043749U CN201820551917.4U CN201820551917U CN208043749U CN 208043749 U CN208043749 U CN 208043749U CN 201820551917 U CN201820551917 U CN 201820551917U CN 208043749 U CN208043749 U CN 208043749U
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- bergamot pear
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Abstract
The utility model is related to a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing devices, belong to detection of agricultural products field.The detection device is made of bergamot pear sound and vibration excitation sensing part, signal collection and processing two parts, and bergamot pear sound and vibration excitation sensing part includes laser-correlation switch transmitting terminal, laser-correlation switch receiving terminal, excitation side pressure electricity beam sensor, sensing side pressure electricity beam sensor, pressure sensor, connecting plate, holder, slide unit, sliding slot, supporting rack, cushion pad, ball-screw, shaft coupling, stepper motor, bottom plate；The signal collection is made of with process part DSP, high voltage amplifier circuit, signal conditioning circuit, touch screen input and display module.The pressure sensor that the detection device uses can control contact force in 0.1 N≤F, 0.24 N, the present apparatus uses sound and vibration signal response method, and relationship between the speed propagated in pear fruit meat by sound and vibration signal and bergamot pear hardness realizes the non-destructive testing of bergamot pear inside quality.
Description
Technical field
The utility model is related to a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing devices, belong to agricultural product
Detection field is used for the non-destructive testing of bergamot pear inside quality.
Background technology
Bergamot pear is one of the famous-brand and high-quality special fruit in Xinjiang, because the features such as how crisp its juice is, fresh and sweet palatable, fragrance is unique China and foreign countries are heard
Name.Hardness is to assess the important evidence of bergamot pear inside quality, and artificial separation fatiguability, error are big at present and the efficiency of separation is low.City
Fruit hardometer portable can detect on field, but accuracy of detection is relatively low；Texture instrument can with degree of precision detect fruit, but volume compared with
It is greatly and expensive, it is unfavorable for portable detection.Both detection means belong to destructive detection, cannot meet practical batch
Automatic detection demand.On July 9 2016 applying date, " a kind of bergamot pear hardness sound and vibration method is lossless by application number 201610538109.X
Detection device " is used for the non-destructive testing of bergamot pear hardness, but this detection mode the degree of automation is relatively low, for measuring bergamot pear excitation
The ultrasonic distance-measuring sensor directionality of distance is poor between point and sensing points, is easily interfered by noise circumstance, precision is not high；Sensing
Device contacts bergamot pear excitation and when sensing signal, stress overloading easily occurs and detection error is big；It installs in piezoelectricity beam sensor
Holder is on-fixed structure, unfettered, causes sound and vibration response signal unstable.For these above-mentioned problems, the utility model
It has carried out a series of improvement and has devised a kind of lossless, efficient, accurate, higher bergamot pear hardness non-destructive testing dress of the degree of automation
It sets, bergamot pear inside quality is detected and classification is of great significance.
Invention content
The purpose of this utility model is to provide a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device,
The control of piezoelectric beam formula sensor contacts power can be made in 0.1 N≤0.24 N of F < using pressure sensor in structure, prevent piezoelectricity
Beam sensor overloads, and improves accuracy of detection；The utility model solves the detection of fruit hardness determination instrument destructiveness, existing sound
The problem that vibration response detection device is influenced by noise and external interference, sound and vibration response signal is unstable, the degree of automation is not high.
The purpose of this utility model is achieved through the following technical solutions.
Its feature of the utility model is：By bergamot pear sound and vibration signal excitation sensing part, signal collection and processing two parts
It constitutes, the bergamot pear sound and vibration signal encourages sensing part by laser-correlation switch transmitting terminal, laser-correlation switch receiving terminal, swashs
Encourage side pressure electricity beam sensor, sensing side pressure electricity beam sensor, pressure sensor, connecting plate, holder, slide unit, sliding slot, support
Frame, cushion pad, ball-screw, shaft coupling, stepper motor, bottom plate；The laser-correlation switch transmitting terminal and laser-correlation are opened
Closing receiving terminal, whether there is or not bergamot pear to be checked, the excitation side pressure electricity beam sensor and sensing side pressure electricity beam sensors for sensing
Respectively to bergamot pear into row energization and sensing, the pressure sensor is for detecting piezoelectricity beam sensor and bergamot pear contact force
Size, make contact force size control in 0.1 N≤0.24 N of F <, connect with holder by screw, the connecting plate is used for
Pressure sensor and piezoelectricity beam sensor are connected, the holder is fixed on slide unit, and the slide unit contacts simultaneously with sliding slot
It slides wherein, the sliding slot is fixed on by screw on bottom plate, and the supporting rack is fixed on bottom plate, the buffering
Pad is placed on supporting rack so that bergamot pear is placed on it can to keep free vibration, the ball-screw to be connect with shaft coupling, use
In measuring the distance between excitation end and sensing end, the shaft coupling connects stepper motor output shaft and ball-screw, and protects
Transmission is held, the stepper motor is fixed by screws on bottom plate；The signal collection and process part respectively with laser
To penetrating switch transmitting and receiving terminal, excitation side pressure electricity beam sensor, sensing side pressure electricity beam sensor, pressure sensor and step
Stepper motor is connected.
The signal collection and process part by laser-correlation switch, DSP, signal conditioning circuit, high voltage amplifier circuit,
AD conversion module, touch screen input and output module composition；Whether there is or not bergamot pear to be measured, DSP to send out sharp wave for laser-correlation switch senses
Pulse, by, through encouraging side pressure electricity beam sensor to carry out sound and vibration excitation, sensing side pressure electricity beam sensor sense after PGA high voltage amplifiers
Sound and vibration response signal is measured, signal condition is carried out by signal conditioning circuit, then acquired sound and vibration signal by DSP core core and calculated
Hardness number shows bergamot pear hardness parameter value after being handled finally by DSP by touch-screen display module.
The high voltage amplifier circuit, including OP37 and two amplifiers of PA85 are transported respectively as the first order of high voltage amplifier circuit
Put reduces external interference for carrying out phase compensation, improves gain curve with second level amplifier, addition capacitance C9 and resistance R6
Decrease speed, eliminate unwanted oscillation, improve amplifying circuit stability, using 90 V linear stabilized power supplies of LM317 voltage stabilizing cores
It powers for amplifier.
The signal conditioning circuit includes the second-order active power filter circuit of LM124 chips, by two 0.01 μ F capacitances and
Two 9.95 k Ω resistance compositions；Scaling circuitry is made of two resistance of 27 k Ω and 3 k Ω, and amplitude limiter circuit is become by sliding
Resistance, zener diode and capacitance composition.
AD analog-to-digital conversions use AD7656-1 chips, and the voltage range of input signal is ± 10 V, has 6 samplings logical
Road meets the needs of acquisition bipolar signal and multi-channel signal acquiring.
Compared with prior art, the utility model is effectively reduced output imbalance electricity using 80 V high voltage amplifier circuits
Pressure；Signal conditioning circuit uses the second-order active filter of LM124 chips, reduces the amplitude of sound and vibration response signal, is convenient for signal
Acquisition；After increasing high voltage amplifier circuit voltage, carried out at 35 dB, 75 dB and 115 dB, tri- kinds of noise circumstances respectively
Test, in 75 dB or less noise circumstances, stability is preferable, shows detection device to the anti-interference relatively strong of ambient noise；Swashing
The size for encouraging and sensing side pressure electricity beam sensor installation pressure sensor control contact force, can make piezoelectric beam formula sensor exist
Optimum contact force range detection, will not there is a phenomenon where because contact force it is excessive inaccurate so as to cause detection；Inspection through device
Performance test is surveyed, automation, inside quality that is portable, accurately nondestructively detecting bergamot pear may be implemented in the utility model, is on line
Detection bergamot pear inside quality provides reliable technical solution in real time, solves fruit hardness determination instrument destruction currently on the market
Property detection, affected by noise big, the problems such as error is larger low with the degree of automation.
Description of the drawings
Fig. 1 is the utility model structure of the detecting device schematic diagram.
Fig. 2 is the three-dimensional structure diagram that the utility model sound and vibration encourages sensing part.
Fig. 3 is the stereogram exploded view that the utility model sound and vibration encourages sensing part.
Fig. 4 is the utility model signal collection and process part schematic block circuit diagram.
Fig. 5 is the utility model high voltage amplifier circuit figure.
Fig. 6 is the utility model signal conditioning circuit circuit diagram.
Fig. 7 is the work flow diagram of the utility model detection device.
In diagram：1 be laser-correlation switch transmitting terminal, 2 be pressure sensor, 3 be connecting plate, 4 be excitation end piezoelectric beam
Formula sensor, 5 be cushion pad, 6 be sensing side pressure electricity beam sensor, 7 be holder, 8 be laser-correlation switch receiving terminal, 9 be
Slide unit, 10 be sliding slot, 11 be bergamot pear supporting rack, 12 be ball-screw, 13 be shaft coupling, 14 be stepper motor, 15 be bottom plate, 16
It is signal collection and process part for bergamot pear, 17.
Specific implementation mode
Embodiment：Include 1 based on the automatic non-destructive testing device of sound and vibration signal response method bergamot pear hardness with reference to attached drawing 1,2,3
For laser-correlation switch transmitting terminal, 2 be pressure sensor, 3 be connecting plate, 4 be excitation end side pressure electricity beam sensor, 5 be slow
Punching pad, 6 be sensing side pressure electricity beam sensor, 7 be holder, 8 be laser-correlation switch receiving terminal, 9 be slide unit, 10 be sliding slot,
11 it is bergamot pear supporting rack, 12 be ball-screw, 13 be shaft coupling, 14 be stepper motor, 15 be bottom plate, 16 be bergamot pear, 17 is letter
Number collect and process part；The laser-correlation switch transmitting terminal 1 is received for emitting laser and being switched with laser-correlation
End 8 is used cooperatively, and whether there is or not bergamot pears to be measured for sensing, are fixed on holder 7, and the pressure sensor 2 is fixed on holder 7,
And be connected with piezoelectricity beam sensor 4 by connecting plate 3, for sensing piezoelectricity point beam sensor 4 and 16 contact force of bergamot pear
Size, the connecting plate 3, connecting bracket 7 and piezoelectricity beam sensor 4, the excitation side pressure electricity beam sensor 4 and sense
Side pressure electricity beam sensor 6 is surveyed respectively to bergamot pear 16 into row energization and sensing, the cushion pad 5 is placed in bergamot pear supporting rack 11
On, bergamot pear 16, which is placed on cushion pad, can keep free vibration, and the holder 7 is for fixation pressure sensor 2 and excitation
Side pressure electricity beam sensor 4, it is fixed on slide unit 9, the slide unit 9 is in embedded sliding slot 10, and is kept with sliding slot 10
Relative motion, the bergamot pear supporting rack 11 are fixed on bottom plate 15, the ball-screw 12 and shaft coupling 13 and stepping electricity
Machine 14 connects, and by rotation so that holder 7 is close or far from bergamot pear 16, the shaft coupling 13 and ball-screw 12 and step
Stepper motor 14 connects, passing power, and the stepper motor 14 provides power, the signal collection and process part respectively with
Laser-correlation switchs transmitting terminal 1, laser-correlation switch receiving terminal 8, pressure sensor 2, excitation side pressure electricity beam sensor 4, sense
Survey side pressure electricity beam sensor 6, stepper motor 14 is connected.
Test before device be in initial position, then bergamot pear 16 is placed on cushion pad 5, press on touch screen detect by
Button, first by laser-correlation switch senses, whether there is or not bergamot pears to be measured, then send out pulse signal by driver, stepper motor starts close
Bergamot pear 16, until the 6 contact bergamot pear of excitation side pressure electricity beam sensor 4 and sensing side pressure electricity beam sensor on holder 7, and by
When pressure sensor 2 detects 0.1 N of contact force size≤F 0.24 N of <, driver no longer sends out pulse signal, stepper motor 14
Stop motion.
The bergamot pear hardness sound and vibration method non-destructive testing device operation principle of the utility model is：Bergamot pear 16 is placed in cushion pad 5
On, device is powered on, laser-correlation switchs transmitting terminal 1 and emits laser, and since bergamot pear 16 is blocked, laser-correlation switch receives
End 8 receives signal, and driver sends out pulse signal, and 14 setting in motion of stepper motor sends out sharp wave pulse signal by DSP, passes through
Encourage side pressure electricity beam sensor 4 to bergamot pear 16 into row energization, then sensing sound and vibration by sensing side pressure electricity beam sensor 6 rings
Induction signal, while DSP calculates 12 umber of pulse of ball-screw and measures the distance between sensing end and excitation end, finally by signal collection
Acquire sound and vibration response data signal and range data with processing unit, acoustic velocity value obtained by data processing, and according to the velocity of sound with
The hardness relation formula of bergamot pear obtains bergamot pear hardness parameter value, and shows bergamot pear hardness parameter value.
As shown in figure 4, the signal collection and process part 17, including DSP, high voltage amplifier circuit, signal condition electricity
Road, touch screen are shown and input module；DSP sends out sharp wave pulse excitation signal and carries out data acquisition and processing (DAP), high voltage amplifier
Circuit amplifies pulse excitation signal, and signal conditioning circuit improves the sound and vibration response signal sensed, and touch screen is shown
Module shows the input of bergamot pear hardness parameter value and operational order.
Signal collection and process part operation principle：Bergamot pear is placed on cushion pad, and laser-correlation switch receiving terminal is hidden
It keeps off, the detection button on point touching screen, DSP sends out sharp wave pulse excitation signal, then carries out point by high voltage amplifier circuit
Wave impulse pumping signal is amplified, and after encouraging bergamot pear, the sound and vibration response signal of generation carries out signal tune by signal conditioning circuit
Reason, then carries out data acquisition and processing (DAP) by DSP, and bergamot pear Hardness results are shown by touch-screen display module.
Such as Fig. 5, the high voltage amplifier circuit uses composite amplifier pattern to reduce output offset voltage, OP37 and
Two amplifiers of PA85 respectively as high voltage amplifier circuit first order amplifier and second level amplifier, using 90 V of LM317 voltage stabilizing cores
Linear stabilized power supply is powered for amplifier.
Amplifier OP37 in Fig. 5 is a kind of low noise, precision, high speed operation amplifier, has extremely low offset voltage, temperature
Drift and high slew rate, are suitable as the first order amplifier of composite amplifier, and PA85 has lower offset voltage, temperature drift
With higher slew rate, supply-voltage rejection ratio, it is suitable as the second level amplifier of composite amplifier.
The operation principle of high voltage amplifier circuit：High voltage amplifier circuit includes PA85 and OP37 and its capacitance resistance periphery electricity
Road；PA37 is first order amplifier, and PA85 is second level amplifier, and sharp wave pulse signal carries out electricity through Vkin inputs by two stage amplifer
It presses greatly, is exported through Vkout.
Such as Fig. 6, the signal conditioning circuit, including contain LM124 chips including inside, by capacitance C65, capacitance
The second-order active power filter circuit that C66, resistance R99 and resistance R100 are constituted；By resistance R97 and resistance R98 compositions variation electricity
Road；Amplitude limiter circuit is made of swept resistance R101, zener diode D42, D43 and capacitance C69.
Signal conditioning circuit principle：The response electric signal EXBIN1 generated by sensing end reduces response by transformation of scale
Voltage value is filtered by active second-order filter circuit later, then passes through LM124 voltage followers, later using
D42, D43 zener diode carry out voltage stabilizing, ensure the stable voltage AINB1 of output.
Shown in Fig. 7, the workflow of automatic detection device includes that laser-correlation switch receiving terminal is blocked by bergamot pear to be checked, defeated
Outlet sends out high level signal and is received by DSP, and DSP sends out sharp wave pulse excitation signal, amplifies through high voltage amplifier circuit, by swashing
It encourages side pressure electricity beam sensor and encourages bergamot pear to be checked, sensing side pressure electricity beam sensor senses sound and vibration response signal, by letter
The conditioning of number modulate circuit, is acquired by DSP, after DSP plug-in FFT transform, and obtains by algorithm the propagation of sound and vibration signal
Time, while the pulse data of DSP acquisition stepper motors calculates range data, carries out data processing through DSP and is calculated
Acoustic velocity value, and then bergamot pear hardness is evaluated, the hardness parameter value of bergamot pear to be checked is finally shown by touch-screen display module.
TMS320F28335 can be used in the dsp chip in signal collection and processing circuit in the utility model.
Claims (4)
1. a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device, it is characterised in that：By bergamot pear sound and vibration signal
Sensing part, signal collection and processing two parts are encouraged to constitute, it includes laser that the bergamot pear sound and vibration signal, which encourages sensing part,
To penetrate switch transmitting terminal, laser-correlation switch receiving terminal, excitation side pressure electricity beam sensor, sensing side pressure electricity beam sensor,
Pressure sensor, connecting plate, holder, slide unit, sliding slot, supporting rack, cushion pad, ball-screw, shaft coupling, stepper motor, bottom plate；
Whether there is or not bergamot pear to be checked, the excitation ends for sensing for the laser-correlation switch transmitting terminal and laser-correlation switch receiving terminal
Piezoelectricity beam sensor and sensing side pressure electricity beam sensor are respectively to bergamot pear into row energization and sensing, the pressure sensor
0.1 N of contact force size≤0.24 N of F <, the connecting plate are sensed for connecting pressure sensor with piezoelectricity beam type
Device, the holder are fixed on slide unit, and the slide unit is contacted with sliding slot and slided wherein, and the sliding slot passes through screw
It is fixed on bottom plate, the supporting rack is fixed on bottom plate, and the cushion pad is placed on supporting rack, the ball-screw
It is connect with shaft coupling, the shaft coupling is for connecting stepper motor output shaft and ball-screw and keeping being driven, the step
Stepper motor is fixed by screws on pedestal；The signal collection emits and connects with laser-correlation switch respectively with process part
Receiving end, excitation side pressure electricity beam sensor, sensing side pressure electricity beam sensor, pressure sensor are connected with stepper motor.
2. a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device according to claim 1, feature
It is：Cushion pad is made of polyethylene material.
3. a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device according to claim 1, feature
It is：Using the supporting band dynamic pressure electricity on 35BYGH250-28 types stepper motor and CBX0804 series of balls leading screws driving slide unit
Beam sensor contacts bergamot pear, calculates distance between excitation point and sensing points by stepper motor step angle and leading screw screw pitch, surveys
Away from precision up to 0.01 mm.
4. a kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device according to claim 1, feature
It is：Signal collection and process part include that DSP, signal conditioning circuit, high voltage amplifier circuit, AD conversion module, touch screen are defeated
Enter and output module, dsp chip are TMS320F28335 chips, signal conditioning circuit realizes that height is pressed using LM124 chips
Big circuit, respectively as the first order and second level amplifier, reduces output offset voltage using OP37 and PA85 to realize.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820551917.4U CN208043749U (en) | 2018-04-18 | 2018-04-18 | A kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device |
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| CN201820551917.4U CN208043749U (en) | 2018-04-18 | 2018-04-18 | A kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device |
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| CN208043749U true CN208043749U (en) | 2018-11-02 |
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| CN201820551917.4U Expired - Fee Related CN208043749U (en) | 2018-04-18 | 2018-04-18 | A kind of sensor contacts power antioverloading type bergamot pear hardness non-destructive testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362733A (en) * | 2020-10-27 | 2021-02-12 | 四川陆通检测科技有限公司 | Detection device and method for detecting buried depth and damage of highway anti-collision guardrail stand column |
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2018
- 2018-04-18 CN CN201820551917.4U patent/CN208043749U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362733A (en) * | 2020-10-27 | 2021-02-12 | 四川陆通检测科技有限公司 | Detection device and method for detecting buried depth and damage of highway anti-collision guardrail stand column |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181102 Termination date: 20190418 |
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