CN203908606U - Ultrasonic-probe automatic positioning device based on DSP (Digital Signal Processor) 28335 - Google Patents
Ultrasonic-probe automatic positioning device based on DSP (Digital Signal Processor) 28335 Download PDFInfo
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- CN203908606U CN203908606U CN201420071335.8U CN201420071335U CN203908606U CN 203908606 U CN203908606 U CN 203908606U CN 201420071335 U CN201420071335 U CN 201420071335U CN 203908606 U CN203908606 U CN 203908606U
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- ultrasonic probe
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- automatic positioning
- positioning device
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Abstract
The utility model discloses an ultrasonic-probe automatic positioning device based on a DSP (Digital Signal Processor) 28335. The ultrasonic-probe automatic positioning device comprises ultrasonic probes, an external clamping device, a stepping motor and a control system. The ultrasonic-probe automatic positioning device is characterized in that the ultrasonic probes are divided into two groups; the external clamping device is provided with two groups of fixed parallel rods; the ultrasonic probes are in sliding connection with the fixed parallel rods and can be fixedly connected with the fixed parallel rods by fixing pieces; one ultrasonic probe is connected with the stepping motor by a screw rod and is connected with a receiving signal of the control system; and a control signal of the control system is connected with the stepping motor. The ultrasonic-probe automatic positioning device disclosed by the utility model has the advantages that manual installation is replaced by adopting the motor to push the ultrasonic probes for positioning, the accuracy of microdisplacement can reach 10microns, the problem of multiple errors in the installation process of the probes can be solved and guarantee can be accurately provided for measurement of an ultrasonic flow meter.
Description
Technical field
The utility model belongs to measurement technical field of measurement and test, relates to a kind of ultrasonic probe automatic positioning equipment based on DSP28335, and the probe that is applicable to external-clamping type ultrasonic flowmeter is installed with fixing.
Background technology
The mode that traditional ultrasonic probe location adopts is manual installation, adopts high-acruracy survey instrument to install by calculating in advance installation site.Adopt on the one hand manual installation unavoidably to have error, ultrasonic flow meter requires high to probe installation location, and trickle error has a great impact testing the speed of reality.The mounting distance calculating in advance along with the variation of industry control on the other hand may not be best mounting distance, and its result is also inevitable exists larger error with actual value, causes flow measurement inaccurate.
In prior art, also there are some to utilize motor to drive the new technology of locating, as " ultrasonic automatic detection system " application number: CN201220632438.8; Probe regulating device comprises orthogonal X-axis, Y-axis and vertical pole guide rail and slide block.The connection of vertical pole slide block, vertical pole guide rail and vertical pole servomotor; And for example " for the position regulator of ultrasonic flaw detecting device " application number: CN200820060098.X, comprises a pair of ultrasonic probe, also comprises a probe dolly; A pair of probe positioning component, is movably arranged on dolly; Described probe is rotationally connected with positioning component up or down, and probe rotates around positioning component vertical axis.It can be realized tandem or K type and detect, and is applicable to the girth seam of heavy caliber welded tube welding seam, dull and stereotyped weld seam and hydrostatic column, the axial automatic ultrasonic inspection of weld seam, effectively increases work efficiency and the standard of detecting a flaw is examined spy rate again.Not only volume is little, lightweight, and stability is high.Utilizing motor to drive location although adopt in above technology, be actually a kind of and automatically detect or fault detection system, is not the automatic station-keeping system between proper ultrasonic probe.
Utility model content
The purpose of this utility model is to provide a kind of ultrasonic probe automatic positioning equipment based on DSP28335, for choosing accurately ultrasonic probe installation site, thereby realizes effective measurement of ultrasonic flow meter.
The purpose of this utility model technical scheme is: (1), employing stepper motor connection wire rod advance ultrasonic probe.(2), select high-performance motor driver A3977SED drive motor.(3), use digital signal processor DSP to produce reliable, accurate control signal.
Technical solutions of the utility model:
A ultrasonic probe automatic positioning equipment based on DSP28335, it comprises ultrasonic probe, outer clamp device, stepper motor and control system,
Described ultrasonic probe is divided into two groups;
Described outer clamp device is provided with two groups of fixing parallel bars;
Ultrasonic probe is slidably connected with fixing parallel bar and can be fixedly connected with by fixture; Wherein a ultrasonic probe is connected with stepper motor by screw mandrel, and this ultrasonic probe is connected with the reception signal of control system; The control signal of control system is connected with stepper motor.
Preferred: described outer clamp device is provided with two groups of fixed supports, between two groups of fixed supports, be connected with fixing parallel bar A and fixing parallel bar B; On every group of fixing parallel bar, be slidably connected and be provided with a slide block, ultrasonic probe is arranged on slide block, and the fixture that each slide block is provided with is screw.
Described stepper motor is arranged on one group of fixed support, and the screw mandrel that connects stepper motor and ultrasonic probe is parallel with the fixing parallel bar in the same side.
Technique effect of the present utility model is:
(1) select stepper motor to promote probe, can realize the accurate micrometric displacement of probe, solved the error that manual installation exists, its micrometric displacement precision can reach 10um.
(2) A3977SED is high-performance electric machine controller, and it controls simple and stability is strong, has reduced the work of Electric Machine Control stepping, has simplified control procedure.
(3) adopt DSP28335 output pulse can realize accurate pulse control, for effective control of system provides guarantee.
(4) adopting motor pushing probe location to replace manual installation can solve multiple error problem in probe installation process, is accurately giving security that ultrasonic flow meter is measured.
Brief description of the drawings
Fig. 1 is the utility model self-navigation ultrasonic probe outer clip apparatus structure schematic diagram;
Fig. 2 is that the utility model motor drives hardware realization figure;
Fig. 3 is the overall control block diagram of the utility model system.
Embodiment
Embodiment 1:
Outer clip fixing link: as shown in Figure 1, describe attainable self-navigation ultrasonic probe outer clip apparatus structure in Fig. 1 in detail.This device is mainly made up of ultrasonic probe, outer clamp device and motor associated components.Ultrasonic probe is divided into two groups of AB: ultrasonic probe A 3, ultrasonic probe B 4; Outer clamp device correspondence is also divided into two groups of slide blocks of AB: the outer clamp device A 5 of ultrasound wave, the outer clamp device B 6 of ultrasound wave; Fixing parallel bar A 8, fixing parallel bar B 9; A stepper motor 2; A screw mandrel 7.Outer clamp device is provided with two groups of fixed supports, is connected with fixing parallel bar A 8 and fixing parallel bar B 9 between two groups of fixed supports; On every group of fixing parallel bar, be slidably connected and be provided with a slide block, the outer clamp device A 5 of ultrasound wave or the outer clamp device B 6 of ultrasound wave, ultrasonic probe is arranged on slide block, and the fixture that each slide block is provided with is screw.
Stepper motor is arranged on one group of fixed support, and the screw mandrel that connects stepper motor and ultrasonic probe is parallel with the fixing parallel bar in the same side.
It is five initialization installation sites after pipeline front ten that the first step requires, and also fixes parallel bar B in flow conduit 1 by the outer clamp device B mounting ultrasonic probe B of ultrasound wave.Second step is loaded onto ultrasound wave outer clamp device A, ultrasonic probe A, fixing parallel bar A, screw mandrel 7 and stepper motor 2.The 3rd stepping enters controlling unit, judges best installation position by system.After the 4th step select location, carry out last fixing by the outer clamp device A of ultrasound wave, realize and installing.
System controlling unit: as shown in Figure 2, the ultrasonic propagation time that single-chip microcomputer MSP430F5438 system completes in measuring ultrasonic wave flow is measured, and communicates by serial ports and digital signal processor TMS320F28335.Digital signal processor DSP (digital signal chip DSP28335) is according to the data that receive, the pwm pulse of output different frequency send the rotating speed that drives the STEP end of chip A3977SED to control motor, and by being connected with EN, the DIR end of driver start and stop and the rotation direction of controlling motor.Fig. 3 is the overall control block diagram of system, in the time of digital signal processor TMS320F28335 system power-up initializing, be initialized as stepper motor forward, digital signal processor MSP430F5438 Flow Measuring System carries out ultrasonic propagation time measurement, judge that the travel-time diminishes if gradually, keep stepper motor to turn to; If become large, change stepper motor and turn to.Judge that ultrasonic measurement time value, for minimum, stops step motor control, determined the position of ultrasonic probe.
The high-performance electric machine controller of selecting has the advantages such as control is simple, strong interference immunity, strong adaptability.Promote to pop one's head in by high-precision screw mandrel and can realize the precise positioning of probe.The peripheral circuit of device is less, has well solved interference and error stack problem that conventional motors control exists, has ensured the stability of equipment.Therefore, selecting minimum step angle is that 42 stepper motors of 1.8 ° are realized screw mandrel and rotated, thereby stepper motor carries out angular displacement and is converted to corresponding displacement of the lines and is promoted by screw mandrel again the movement of ultrasonic probe according to the pulse signal that receives, the screw mandrel precision of customization can reach the corresponding 10um screw mandrel of every 1.8 ° of motor angular displacements displacement of the lines.
Adopt and drive chip A3977SED, it is the complete microstepping motor driver that contains built-in converter and code translator, and inside has the synchronous commutating control circuit of power consumption when improving PWM operation and can automatically improve.Only need pulse of input to get final product stepping of driving motor, output is completed by two H bridges of DMOS.This driving chip is set to full step mode, drives the frequency of signal to determine motor speed, the stepping angle of the number control motor of pulse.
Adopt DSP28335 to carry out the output of pulse signal and control signal, nearly 18 tunnels of the available PWM output of DSP28335, have been used its independently PWM module generation pulse signal just in native system, and by the operation of IO mouth control motor.
Concrete localization method is as follows:
In pipe under test, carry out rough installation position selection, the outer clamp device that contains one end probe is installed on to a side of pipeline and is fixed with screw.Device adopts two parallel fixed bars to reach the object of probe in a horizontal level, then carry out the selection of system signal point, select the final better installation position selection that realizes another probe by host computer signal measurement control motor removing, and by outer clamp device, probe is fixed to installation.
The installation site of the external clamping ultrasonic probe how to confirm other end probe that one end has fixed, the mode adopting in the utility model is that the intensity of the signal that receives according to ultrasonic probe is determined installation site (requiring signal intensity to be greater than 60%) accurately, and the mounting distance of ultrasonic probe has its specific threshold value (DN50 caliber be adopt its two probes mounting distance of V method be 35mm left and right).DSP exports corresponding pulse according to the signal intensity of upper computer detection, adopts higher rotation speed mode to scan pipeline in the time that signal intensity is on the low side, is converted to low-speed operation mode in the time that signal intensity reaches 50%.
When particular hardware realization is presented as high-speed cruising, DSP employing increases progressively count mode and carries out pwm pulse output, by the initial value of period register (TBPDR) being reduced increase the frequency of pulse output, EPWM1A end by DSP connects CLK (STEP) end of step-by-step controller A3977SED, and by the GPIO16 end of DSP connect the DIR end of step-by-step controller, by GPIO17 hold connection step-by-step controller EN (
) end controls respectively the turning to of motor, start and stop.As the same when slow running, difference is that period register initial value is larger.Ultrasonic flow meter is had relatively high expectations to two probe mounting distances, and under high speed and low speed, the relative rotation speed of motor is all lower, and two predefined initial values of gear are all larger.
System controlling unit: as shown in Figure 2, in Fig. 2, TMS320F28335 controls A3977SED Driving Stepping Motor.The ultrasonic propagation time that MSP430F5438 system completes in measuring ultrasonic wave flow is measured, and communicates by serial ports and TMS320F28335.DSP is according to the data that receive, and the pwm pulse of output different frequency send the rotating speed of the STEP end control motor of A3977SED, and by being connected with EN, the DIR end of driver start and stop and the rotation direction of controlling motor.Fig. 3 is the general procedure block diagram of system, selects the operational mode of motor in Fig. 3 according to the intensity of signal.In the time of TMS320F28335 system power-up initializing, be initialized as stepper motor forward, MSP430F5438 Flow Measuring System carries out ultrasonic propagation time measurement, judges that the travel-time diminishes if gradually, keeps stepper motor to turn to; If become large, change stepper motor and turn to.Judge that ultrasonic measurement time value, for minimum, stops step motor control, determined the position of ultrasonic probe.
Claims (3)
1. the ultrasonic probe automatic positioning equipment based on DSP28335, it comprises ultrasonic probe, outer clamp device, stepper motor and control system, it is characterized in that:
Described ultrasonic probe is divided into two groups;
Described outer clamp device is provided with two groups of fixing parallel bars;
Ultrasonic probe is slidably connected with fixing parallel bar and can be fixedly connected with by fixture; Wherein a ultrasonic probe is connected with stepper motor by screw mandrel, and this ultrasonic probe is connected with the reception signal of control system; The control signal of control system is connected with stepper motor.
2. a kind of ultrasonic probe automatic positioning equipment based on DSP28335 according to claim 1, is characterized in that: described outer clamp device is provided with two groups of fixed supports, is connected with fixing parallel bar A and fixing parallel bar B between two groups of fixed supports; On every group of fixing parallel bar, be slidably connected and be provided with a slide block, ultrasonic probe is arranged on slide block, and the fixture that each slide block is provided with is screw.
3. a kind of ultrasonic probe automatic positioning equipment based on DSP28335 according to claim 2, it is characterized in that: described stepper motor is arranged on one group of fixed support, the screw mandrel that connects stepper motor and ultrasonic probe is parallel with the fixing parallel bar in the same side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071335.8U CN203908606U (en) | 2014-02-19 | 2014-02-19 | Ultrasonic-probe automatic positioning device based on DSP (Digital Signal Processor) 28335 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071335.8U CN203908606U (en) | 2014-02-19 | 2014-02-19 | Ultrasonic-probe automatic positioning device based on DSP (Digital Signal Processor) 28335 |
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| CN203908606U true CN203908606U (en) | 2014-10-29 |
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| CN201420071335.8U Expired - Fee Related CN203908606U (en) | 2014-02-19 | 2014-02-19 | Ultrasonic-probe automatic positioning device based on DSP (Digital Signal Processor) 28335 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776501A (en) * | 2014-02-19 | 2014-05-07 | 东华理工大学 | DSP28335 based method and device for automatically positioning ultrasonic probe |
| CN109341794A (en) * | 2018-12-24 | 2019-02-15 | 南京光声超构材料研究院有限公司 | Ultrasonic flowmeter and the method for adjusting energy converter |
-
2014
- 2014-02-19 CN CN201420071335.8U patent/CN203908606U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776501A (en) * | 2014-02-19 | 2014-05-07 | 东华理工大学 | DSP28335 based method and device for automatically positioning ultrasonic probe |
| CN103776501B (en) * | 2014-02-19 | 2016-08-10 | 东华理工大学 | A kind of ultrasound probe automatic positioning method based on DSP28335 |
| CN109341794A (en) * | 2018-12-24 | 2019-02-15 | 南京光声超构材料研究院有限公司 | Ultrasonic flowmeter and the method for adjusting energy converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150219 |
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| EXPY | Termination of patent right or utility model |