CN103217244A - Shock absorber tension and pressure measuring instrument and detection method thereof - Google Patents
Shock absorber tension and pressure measuring instrument and detection method thereof Download PDFInfo
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- CN103217244A CN103217244A CN2013100982104A CN201310098210A CN103217244A CN 103217244 A CN103217244 A CN 103217244A CN 2013100982104 A CN2013100982104 A CN 2013100982104A CN 201310098210 A CN201310098210 A CN 201310098210A CN 103217244 A CN103217244 A CN 103217244A
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Abstract
The invention provides a shock absorber tension and pressure measuring instrument and a detection method thereof, which overcome the defects that existing measuring equipment measures data incompletely, and is low in measurement precision and free of a function of perfecting parameter statistics and analysis. The shock absorber tension and pressure measuring instrument comprises a supporting frame, wherein the supporting frame is provided with an operation desk; a motor is arranged below the operation desk; the output shaft of the motor vertically penetrates through the operation desk and is connected with a transmission component in a driving way; the outer end of the transmission component is movably connected onto a sliding component; a tension and pressure detection position is arranged on the sliding component; a tension and pressure sensor is positioned on the tail end of the tension and pressure detection position; the tension and pressure sensor is connected with an amplifier filter, an A/D (Analog/Digital) converter, a microprocessor and an upper computer in sequence; and the microprocessor controls and is connected with the motor through a driving circuit. The detection method of the shock absorber tension and pressure measuring instrument comprises the steps of pressure collection, conversion, judging, storage, transmission, motor control and the like. The shock absorber tension and pressure measuring instrument and the detection method thereof have the advantages of being simple in structure of the instrument, reliable to act, rational in detection program design and clear in detection parameters, thereby being beneficial to further research and analysis.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of at the washing machine vibration absorber performance detection, particularly a kind of vibroshock pull or press force test instrument and detection method thereof.
Background technology
Damping shock absorption device in the roller washing machine plays the support washing machine steel ladle, and absorbs the effect of these steel ladle vibrations.The quality of its quality directly has influence on the shockproofness of washing machine, noise level and serviceable life.Therefore it is particularly important to design a kind of instrument that detects the washing machine vibration absorber quality.
Vibroshock measuring equipment of the prior art exist usually measurement data not comprehensively, to measure precision low, and do not possess the function that the parametric statistics improved is analyzed, and lacks the defectives such as technical support that background system is handled.
Summary of the invention
The objective of the invention is to have the problems referred to above, proposed a kind ofly to measure the pressure of vibroshock in real time, and measurement data is made linear process, diagnose the vibroshock pull or press force test instrument and the detection method thereof of measured piece quality thus by sensor at existing technology.
Purpose of the present invention can realize by following technical proposal: vibroshock pull or press force test instrument, comprise bracing frame with operator's console, it is characterized in that, motor is installed in the below of described operator's console, the output shaft of described motor vertically runs through operator's console and drives the connection transmission component, the outer end of described transmission component is movably connected on slide assemblies, the tension and compression detecting position is set on the described slide assemblies, the end location pull pressure sensor of described tension and compression detecting position, described pull pressure sensor connects amplifilter in turn, A/D converter, microprocessor and host computer, wherein microprocessor is by the above-mentioned motor of driving circuit control linkage.
Motor is specially AC motor in this vibroshock pull or press force test instrument, and it is as power source equipment.Operator's console is arranged in turn to the rear end by front end and is established motor, transmission component and slide assemblies, and wherein motor is installed in the below of operator's console and the head end position of connection transmission component, and transmission component and slide assemblies are arranged the upper table surface that is located at operator's console in turn along straight line.Pull pressure sensor, amplifilter, A/D converter, microprocessor and host computer form signal parameter and handle detection system.
In above-mentioned vibroshock pull or press force test instrument, described transmission component comprises the cam that is solidly set on the motor output shaft end, articulated linkage on the border of described cam, the hinged above-mentioned slide assemblies in the outer end of described connecting rod.One end of connecting rod is hinged on the border body of cam, so when the cam time rotational, connecting rod is moved in a circle around the cam center of circle by pin joint, another hinged end of drivening rod is done the shift reciprocately motion thus.
In above-mentioned vibroshock pull or press force test instrument, described slide assemblies comprises the guide rail that is fixedly arranged on the operator's console, be card on the described guide rail and be connected to two take-up housings, and be above-mentioned tension and compression detecting position between described two take-up housings.
In above-mentioned vibroshock pull or press force test instrument, set firmly Connection Block on the described take-up housing that is positioned at head end, the end of described Connection Block and above-mentioned connecting rod is and is hinged and connected, install above-mentioned pull pressure sensor on the described take-up housing that is positioned at tail end, described tension and compression detecting position comprises the link that pull pressure sensor the inner is connected, and each hangs down and is provided with joint pin on described link and the Connection Block.Two joint pins are arranged on the central line of guide rail extension, when connecting rod drives stretching or compression shock absorption device, realize the pressure positive acting thus, to promote vibroshock performance detection degree of accuracy.
In above-mentioned vibroshock pull or press force test instrument, the described take-up housing end face that is positioned at tail end sets firmly locating rack, and described pull pressure sensor is fixedly arranged on the locating rack, and described locating rack forms fixing assembling by screw and above-mentioned guide rail.Fix assembling by locating rack and guide rail, realize that synchronously both location of take-up housing of pull pressure sensor and tail end are connected.
The detection method of vibroshock pull or press force test instrument is characterized in that, may further comprise the steps:
(1), the two ends of tested vibroshock are located by connecting on two joint pins one by one, system power on and microprocessor through behind the system initialization, open by driving circuit control motor;
(2), the output shaft of motor drives cam and connecting rod action, the reciprocal translation gliding of the slide block of interlock head end thus, and then driving vibroshock tension and compression circulation running, pull pressure sensor synchronous acquisition data, and output signal is transferred to A/D converter by amplifilter, A/D converter is converted to digital quantity signal with analog signals, and judges to press and draw flex point;
(3), obtain press draw flex point after, draw flex point as the circulation beginning flag with pressure, A/D converter is according to unit interval cyclic transformation data and the storage of 15ms, after the storage data reached 40, microprocessor sent to host computer with packing data;
(4), microprocessor cuts out by driving circuit control motor.
The detection method of this vibroshock pull or press force test instrument is to measure the pressure of vibroshock in real time by pull pressure sensor, and amplify, filtering, A/D conversion process, data after the processing are changed through numerical value, the packing back is transferred to host computer according to specified protocol by microprocessor (next bit computer), and then data are handled by the software systems of host computer, and form data form or graph curve, diagnose the quality of measured piece (vibroshock) thus.
In the detection method of above-mentioned vibroshock pull or press force test instrument, described pull pressure sensor, amplifilter, A/D converter and microprocessor correspondence successively are set to signal acquisition circuit, amplification filtering circuit, A/D change-over circuit and signal processing circuit.
In the detection method of above-mentioned vibroshock pull or press force test instrument, described microprocessor connects above-mentioned host computer by RS232 communication protocol.
In the detection method of above-mentioned vibroshock pull or press force test instrument, use the MAX232CPE chip to carry out level conversion in the described RS232 communication protocol.This is a kind of SCM Based pressure acquisition control system, comprises signal acquisition circuit, amplification filtering circuit, A/D change-over circuit, single-chip minimum system, RS232 communication protocol circuit, motor-drive circuit.
In the detection method of above-mentioned vibroshock pull or press force test instrument, comprise successively in the software systems of described host computer land administration module, data memory module, N secondary data form contrast module, the F that makes a round trip-S curve module, back and forth N F-N curve module, parameter are provided with module and print module.
Compared with prior art, this vibroshock pull or press force test instrument and detection method thereof adopt controls stable power-equipment, and precisely effectively transmission, tension and compression structure, and then image data and processing draw vibroshock performance judged result accurately; This vibroshock pull or press force test instrument possesses characteristics such as simple structure, reliable effect, work efficiency height simultaneously; It is reasonable in design that its detection method has step procedure, and detected parameters comes into plain view, and is beneficial to further and researchs and analyses, and the pull or press force test embodiment of complete and high-quality is provided for vibroshock.
Description of drawings
Fig. 1 is the perspective view of this vibroshock pull or press force test instrument.
Fig. 2 is the hardware principle of compositionality block diagram of this vibroshock pull or press force test instrument.
Fig. 3 is the step procedure block diagram of the detection method of this vibroshock pull or press force test instrument.
Fig. 4 is the circuit diagram of this vibroshock pull or press force test instrument.
Among the figure, 1, operator's console; 2, motor; 3, cam; 4, connecting rod; 5, guide rail; 6, take-up housing; 7, Connection Block; 8, locating rack; 9, screw; 10, pull pressure sensor; 11, link; 12, joint pin; 13, vibroshock.
Embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As depicted in figs. 1 and 2, this vibroshock pull or press force test instrument comprises the bracing frame with operator's console 1, operator's console 1 is arranged in turn to the rear end by front end and is established motor 2, transmission component and slide assemblies, wherein motor 2 is installed in the below of operator's console 1 and the head end position of connection transmission component, and transmission component and slide assemblies are arranged the upper table surface that is located at operator's console 1 in turn along straight line.
Motor 2 is specially AC motor, and it is as power source equipment.The output shaft of motor 2 vertically runs through operator's console 1 and drives the connection transmission component, the outer end of transmission component is movably connected on slide assemblies, the tension and compression detecting position is set on the slide assemblies, the end location pull pressure sensor 10 of tension and compression detecting position, pull pressure sensor 10 connects amplifilter, A/D converter, microprocessor and host computer in turn, and wherein microprocessor is by driving circuit control linkage motor 2.
Transmission component comprises the cam 3 that is solidly set on motor 2 output shaft ends, is hinged with a connecting rod 4 on the border body of cam 3.
Slide assemblies comprises the guide rail 5 that is fixedly arranged on the operator's console 1, is card on the guide rail 5 and is connected between 6, two take-up housings 6 of two take-up housings and is the tension and compression detecting position.Be positioned on the take-up housing 6 of head end and set firmly Connection Block 7, the end of Connection Block 7 and connecting rod 4 is and is hinged and connected; Take-up housing 6 end faces that are positioned at tail end set firmly locating rack 8, install pull pressure sensor 10 on the locating rack 8, and locating rack 8 forms fixing assembling by screw 9 and guide rail 5, and the take-up housing 6 of pull pressure sensor 10 and tail end forms positioning connection thus.
The tension and compression detecting position comprises the link 11 that pull pressure sensor 10 the inners are connected, each hangs down and is provided with joint pin 12 on this link 11 and the Connection Block 7, and two joint pins 12 are arranged on the central line of guide rail 5 extensions, thus when connecting rod 4 drives stretching or compression shock absorption device 13, realize the pressure positive acting, to promote vibroshock 13 performance detection degree of accuracy.
As shown in Figure 3, according to the effect connection of the said equipment and structure, the detection method of this vibroshock pull or press force test instrument may further comprise the steps:
(1), the two ends of tested vibroshock 13 are located by connecting on two joint pins 12 one by one, system powers on and wait for the instruction of host computer in interruption, and microprocessor is opened by driving circuit control motor 2 through behind the system initialization.
(2), the output shaft of motor 2 drives cam 3 and connecting rod 4 actions, the reciprocal translation gliding of the slide block of interlock head end thus, and then driving vibroshock 13 tension and compression circulation running, pull pressure sensor 10 synchronous acquisition data, and output signal is transferred to A/D converter by amplifilter, A/D converter is converted to digital quantity signal with analog signals, and judges to press and draw flex point.
The most significant digit of judging the digital quantity signal that converts to is 1 or 0.If 1, expression vibroshock 13 is in the process of drawing; If 0, expression vibroshock 13 is in the process of pressure.The design becomes 1 with the digital quantity signal most significant digit by 0, promptly judges to press and draws flex point.
(3), obtain press draw flex point after, draw flex point as the circulation beginning flag with pressure, A/D converter is according to unit interval cyclic transformation data and the storage of 15ms, after the storage data reached 40, microprocessor sent to host computer with packing data.
(4), microprocessor cuts out by driving circuit control motor 2.
As shown in Figure 4, in this vibroshock pull or press force test instrument pull pressure sensor 10, amplifilter, A/D converter and microprocessor successively correspondence be set to signal acquisition circuit, amplification filtering circuit, A/D change-over circuit and signal processing circuit.
Signal acquisition circuit is selected 500N S type resistance-strain type pull pressure sensor 10 for use.For pulling force and pressure, this sensor can the opposite voltage signal of output polarity, the design's pulling force output positive voltage, pressure output negative voltage, the scope of output voltage is-20mv-+20mv, sensitivity is 2mV/V, synthesis precision is 0.02, it is good to have the output symmetry thus, characteristics such as precision height, compact conformation.
The differential signal of pull pressure sensor 10 outputs links to each other with 2,3 pins of AD620 amplifilter.Wherein P1 is the connection terminal that amplifilter links to each other with pull pressure sensor 10.The AD620 amplifilter is the instrument amplifier of a high-precision and low-offset voltage and low offset drift, can amplify bipolar signal.Its inner three amplifier difference input improvement design of adopting classics has effectively suppressed common mode interference.Connecting resistance R1 between 1 and 8 pins of AD620 amplifilter is used for the control of gain amplifier.
Signal after amplification filtering is handled is sent into 13 pins as the AD574 chip of A/D converter, and then converts analog signals to digital quantity signal.The AD574 chip is 12 successive approximation A/D analog to digital converters, can change bipolar signal.The digital quantity from 100000000000 to 111111111111 that converts to of positive voltage wherein; The digital quantity from 000000000000 to 011111111111 that negative voltage transition becomes.Meet potentiometer R3 between its interior 8 and 10 pin, meet potentiometer R4 between 8 and 12 pins, be respectively applied for the adjustment at gain and zero point.
The signal Processing of microprocessor is selected the STC89C52 single-chip microcomputer for use.Y1, C7 in it, C8 constitute the oscillatory circuit of single-chip microcomputer, and R5, R6, C6, S1 constitute the reset circuit of single-chip microcomputer, and realize hand-reset.21 pins of STC89C52 single-chip microcomputer link to each other with 28 pins of AD574 chip, detect 21 pin states in real time, when detecting negative edge, illustrate that the A/D converter conversion finishes, and the STC89C52 single-chip microcomputer receives the data of A/D converter then, and the line linearity of going forward side by side is handled.
The STC89C52 single-chip microcomputer is also by 22 pin pilot relay K1, thereby the startup of control motor 2B1 stops, and is motor-drive circuit.
Microprocessor connects host computer by RS232 communication protocol.Be to adopt RS232 communication protocol between STC89C52 single-chip microcomputer and the host computer, use the MAX232CPE chip to carry out level conversion especially.9,10 pins of MAX232CPE chip link to each other with 10,11 pins of STC89C52 single-chip microcomputer respectively, and 7,8 pins link to each other with 2,3 pins of serial ports J1.C1, C2, C3, C4, C5 are 5 electric capacity that link to each other with MAX232CPE, are used for filtering and energy storage effect.Whenever measure a tension and compression circulation, packing data sends to host computer, and its call duration time needs the time less than the A/D sample conversion, to prevent the mistake of Lou sampling and delay sampling.
Motor 2 rotating speeds that the design uses are 100r/min, and then motor 2 rotates a circle, and the promptly tested once used time of vibroshock 13 tension and compression is 600ms.Requirement 40 points of sampling at least in tension and compression circulation, then sampling interval is the longest is 15ms.Computational analysis thus, this baud rate is set to 57600.
Comprise following operational module in the software systems of host computer successively:
1) lands administration module: make things convenient for equipment user of service register, and prevent that the irrelevant personnel from entering system.
2) data memory module: the host computer management software is selected large-scale database for use, can store super amount test data, and then accomplishes power down data hold function.
3) N secondary data form contrast module: set measured piece to-and-fro movement number of times, can form the data statistics form according to set point number, the peak-to-valley value and the mean value of the data that obtain in the reflection set point number, and the mark data that go beyond the scope satisfy and detect requirement.
4) F-S curve module that makes a round trip: show F-S curve that all measured data form in process of measured piece to-and-fro movement in real time, diagnose the situation of measured piece data variation in motion process thus.
5) reciprocal N F-N curve module: measured piece to-and-fro movement N time, to the data formation F-N curve of specified point, diagnose the serviceable life of measured piece thus.
6) parameter is provided with module: according to the measured piece characteristic, set test parameter, make this software have stronger adaptability.
7) print module: the data or the graph curve of needs are printed, be convenient to check and read.
Other functions can increase according to modular form successively according to test request.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used operator's console 1 morely; Motor 2; Cam 3; Connecting rod 4; Guide rail 5; Take-up housing 6; Connection Block 7; Locating rack 8; Screw 9; Pull pressure sensor 10; Link 11; Joint pin 12; Vibroshock 13 terms such as grade, but do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (10)
1. vibroshock pull or press force test instrument, comprise bracing frame with operator's console, it is characterized in that, motor is installed in the below of described operator's console, the output shaft of described motor vertically runs through operator's console and drives the connection transmission component, the outer end of described transmission component is movably connected on slide assemblies, the tension and compression detecting position is set on the described slide assemblies, the end location pull pressure sensor of described tension and compression detecting position, described pull pressure sensor connects amplifilter in turn, A/D converter, microprocessor and host computer, wherein microprocessor is by the above-mentioned motor of driving circuit control linkage.
2. vibroshock pull or press force test instrument according to claim 1 is characterized in that described transmission component comprises the cam that is solidly set on the motor output shaft end, articulated linkage on the border of described cam, the hinged above-mentioned slide assemblies in the outer end of described connecting rod.
3. vibroshock pull or press force test instrument according to claim 1 is characterized in that described slide assemblies comprises the guide rail that is fixedly arranged on the operator's console, is card on the described guide rail and is connected to two take-up housings, and be above-mentioned tension and compression detecting position between described two take-up housings.
4. vibroshock pull or press force test instrument according to claim 3, it is characterized in that, set firmly Connection Block on the described take-up housing that is positioned at head end, the end of described Connection Block and above-mentioned connecting rod is and is hinged and connected, install above-mentioned pull pressure sensor on the described take-up housing that is positioned at tail end, described tension and compression detecting position comprises the link that pull pressure sensor the inner is connected, and each hangs down and is provided with joint pin on described link and the Connection Block.
5. vibroshock pull or press force test instrument according to claim 4 is characterized in that, the described take-up housing end face that is positioned at tail end sets firmly locating rack, and described pull pressure sensor is fixedly arranged on the locating rack, and described locating rack forms fixing assembling by screw and above-mentioned guide rail.
6. the detection method of vibroshock pull or press force test instrument is characterized in that, may further comprise the steps:
(1), the two ends of tested vibroshock are located by connecting on two joint pins one by one, system power on and microprocessor through behind the system initialization, open by driving circuit control motor;
(2), the output shaft of motor drives cam and connecting rod action, the reciprocal translation gliding of the slide block of interlock head end thus, and then driving vibroshock tension and compression circulation running, pull pressure sensor synchronous acquisition data, and output signal is transferred to A/D converter by amplifilter, A/D converter is converted to digital quantity signal with analog signals, and judges to press and draw flex point;
(3), obtain press draw flex point after, draw flex point as the circulation beginning flag with pressure, A/D converter is according to unit interval cyclic transformation data and the storage of 15ms, after the storage data reached 40, microprocessor sent to host computer with packing data;
(4), microprocessor cuts out by driving circuit control motor.
7. the detection method of vibroshock pull or press force test instrument according to claim 6, it is characterized in that described pull pressure sensor, amplifilter, A/D converter and microprocessor correspondence successively are set to signal acquisition circuit, amplification filtering circuit, A/D change-over circuit and signal processing circuit.
8. the detection method of vibroshock pull or press force test instrument according to claim 6 is characterized in that described microprocessor connects above-mentioned host computer by RS232 communication protocol.
9. the detection method of vibroshock pull or press force test instrument according to claim 8 is characterized in that, uses the MAX232CPE chip to carry out level conversion in the described RS232 communication protocol.
10. the detection method of vibroshock pull or press force test instrument according to claim 6, it is characterized in that, comprise successively in the software systems of described host computer land administration module, data memory module, N secondary data form contrast module, the F that makes a round trip-S curve module, back and forth N F-N curve module, parameter are provided with module and print module.
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| CN201310098210.4A CN103217244B (en) | 2013-03-26 | 2013-03-26 | Vibroshock pull or press force test instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310098210.4A CN103217244B (en) | 2013-03-26 | 2013-03-26 | Vibroshock pull or press force test instrument |
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| CN103217244B CN103217244B (en) | 2015-11-18 |
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| CN106908182A (en) * | 2017-04-25 | 2017-06-30 | 无锡职业技术学院 | A kind of roller washing machine damper damping force Auto-Test System |
| CN106969866A (en) * | 2017-03-15 | 2017-07-21 | 江门星火减震器有限公司 | A kind of rear damper damping force checking device |
| CN108519227A (en) * | 2018-04-09 | 2018-09-11 | 张家港市欧微自动化研发有限公司 | A kind of damper detection device |
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| CN109115486A (en) * | 2018-10-24 | 2019-01-01 | 西安爱生技术集团公司 | A kind of unmanned plane oleo-pneumatic shock absorber static pressure testing device |
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| CN109115486B (en) * | 2018-10-24 | 2023-10-17 | 西安爱生技术集团有限公司 | Unmanned aerial vehicle engine oil gas shock absorber static pressure testing arrangement |
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