CN101936722A - On-line measurement device and method for supporting precision grinding of antenna cover - Google Patents
On-line measurement device and method for supporting precision grinding of antenna cover Download PDFInfo
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- CN101936722A CN101936722A CN 201010267845 CN201010267845A CN101936722A CN 101936722 A CN101936722 A CN 101936722A CN 201010267845 CN201010267845 CN 201010267845 CN 201010267845 A CN201010267845 A CN 201010267845A CN 101936722 A CN101936722 A CN 101936722A
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Abstract
The invention relates to an on-line measurement device and an on-line measurement method for supporting precision grinding of an antenna cover. The device comprises a small-angle turning device, an on-line displacement detection device and an information processing device, wherein the small-angle turning device comprises a mounting bracket, a shaft coupling, a substrate and a step motor; the step motor is arranged in the mounting bracket and connected with a driver and a motion controller in turn, and the output shaft of the step motor is upward and is connected with the substrate through the shaft coupling; the on-line displacement detection device comprises a displacement sensor and a sensor controller which are interconnected, and the displacement sensor is arranged on the substrate; and the information processing device comprises a control module and a data processing module. The operation of the step motor is driven by using the control module so that the displacement sensor is positioned in the normal direction of the antenna cover; and the actual grinding amount is calculated according to the normal direction of the mold line of the antenna cover and the measured data by using the data processing module so that the actual grinding amount of the antenna cover is detected on line after grinding and the grinding precision and processing efficiency are improved.
Description
Technical field
The present invention relates to large complicated shape revolving body workpieces geometric accuracy field of measuring technique, particularly relate to a kind of on-line measurement device and method of supporting the accurate reconditioning of antenna house.
Background technology
Missile-borne radome is one of critical component of guided missile, is positioned at the head of guided missile, and its effect is a protection missile antenna operate as normal.Antenna house is wanted to bear the high temperature that produces in the guided missile high-speed flight on the one hand, and antenna is played the thermal insulation protection effect; On the other hand because it is positioned at the front of antenna, should be as much as possible little to the influence of the signal of aerial radiation and reception, guarantee information sees through behind the antenna house undistorted.Therefore, except good aerodynamic configuration will be arranged, antenna house also will have good electromagnetic transmission characteristic, satisfied the electric property requirement of antenna system.
Ceramic radome belongs to thin-wall construction, material is crisp hard, easily produces microcrack in the processing, and through after the finishing, its geometric configuration and size meet the demands, but electric property often can not well satisfy request for utilization.Wherein electric thickness be insert phase-shift delay the most basic also be topmost component, be the very important index of estimating the comprehensive electric property of antenna house, it not only influences the transfer efficiency of antenna house, also influences the pointing error of antenna house.Therefore, for guaranteeing the pointing accuracy of guided missile, add the precision index requirement that should guarantee electric thickness man-hour at antenna house.
At present, the grinding bearing calibration can meet design requirement cover wall electric thickness distribution everywhere by antenna house is carried out grinding.This method not only can reduce pointing error and pointing error rate, and distortion waits all other electrical performance indexes that the improvement effect is also arranged to beam shape simultaneously, can improve the overall performance electrical performance of antenna house.But this method in use has the following disadvantages:
(1) after the antenna house finishing, calculate the geometric sense of reconditioning or spraying according to electric thickness error, but be subjected to the influence of workpiece alignment error, machine tool accuracy and reconditioning or spraying coating process in the actual process, machining precision is not very high, and often there is bigger deviation in the geometric sense of promptly actual reconditioning or spraying with the geometric sense of theoretical reconditioning or spraying.
(2) prior art is separately carried out on different stations with reconditioning the measurement of antenna house geometric thickness usually, promptly after measurement finishes on the measurement station, be transported to again on the reconditioning station and install, debug, after reconditioning finishes, move back to again to measure on the station and measure, need equally before the measurement to install, debug.Intermediate conversion links is many like this, troublesome poeration, and inefficiency, and also antenna house repeats to install the positioning error of bringing and will influence measuring accuracy.
Summary of the invention
Technical matters to be solved by this invention provides a kind of on-line measurement device and method of supporting the accurate reconditioning of antenna house, reduces the conversion links of measuring with reconditioning, improves the reconditioning precision and the working (machining) efficiency of antenna house.
The technical solution adopted for the present invention to solve the technical problems is: a kind of on-line measurement device of supporting the accurate reconditioning of antenna house is provided, comprise low-angle revolving gear, online displacement detector and signal conditioning package, described low-angle revolving gear comprises mounting bracket, shaft coupling, substrate, stepper motor, driver and motion controller; Described mounting bracket is fixed on the platen; Described stepper motor is installed in the described mounting bracket, and links to each other successively with motion controller with described driver; The output shaft of described stepper motor and links to each other with described substrate by described shaft coupling up; Described online displacement detector comprises interconnective displacement transducer and sensor controller; Described displacement transducer is installed on the described substrate; Described signal conditioning package comprises control module and data processing module; Described control module links to each other with described motion controller, and described data processing module links to each other with described sensor controller.
The measuring center point of described displacement sensor head and machine tool chief axis centerline are in same level height.
Described control module is used to drive described low-angle slewing equipment, makes the detection side of described displacement transducer to the normal direction that is in antenna house; Described data processing module calculates normal orientation according to the antenna house molded lines the measured data of described displacement transducer is analyzed and evaluated.
Described mounting bracket by screw retention on platen; Described stepper motor is installed in the described mounting bracket by screw.
Described displacement transducer and sensor controller interconnect by the high-frequency electrical cable.
The technical solution adopted for the present invention to solve the technical problems is: a kind of On-line Measuring Method of supporting the accurate reconditioning of antenna house also is provided, may further comprise the steps:
(1) position and the direction of calculating on-line measurement device: set up workpiece coordinate system, outline molded lines according to antenna house, calculate X, Z coordinate figure and the normal vector of each measurement point of antenna house outer mold surface by the data processing module of signal conditioning package, thus the angle of revolution of X, Z coordinate figure and low-angle slewing equipment when determining displacement sensor;
(2) X of on-line measurement device, Z are to the location: drive the lathe movable workbench by numerical control program, drive displacement transducer and move to specified measurement point position;
(3) normal direction of displacement transducer location: the control module of signal conditioning package sends instruction according to the angle of revolution that calculates to motion controller, motion controller is by the driver drives stepper motor, drive substrate rotating, substrate drives displacement transducer and rotates an angle, thereby make displacement sensor centrally aligned antenna house outer mold surface measured point, displacement transducer is measured by antenna house profile normal direction when guaranteeing to measure simultaneously;
(4) measurement and image data: signal conditioning package is counted and frequency by the collection of sensor controller control bit displacement sensor, displacement transducer is measured described each measurement point respectively before and after the antenna house reconditioning, sensor controller will send to signal conditioning package by the measured data of displacement transducer, and signal conditioning package receives and preserve data;
(5) calculate actual reconditioning quality: by the data processing module of signal conditioning package, the data of twice measurement before and after the antenna house reconditioning are handled, can be obtained the actual reconditioning quality of antenna house;
(6) numerical control program compensation and reconditioning: signal conditioning package is evaluated actual reconditioning quality, if satisfy the reconditioning requirement, then finishes; If do not satisfy the reconditioning requirement, then, generate the digital control processing compensation program according to the deviation of actual reconditioning quality and theoretical reconditioning quality, once more antenna house is carried out reconditioning, once more antenna house is measured, evaluated after reconditioning is intact, till reaching the reconditioning requirement.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the present invention compared with prior art, have following advantage and good effect: the present invention can carry out the detection of geometric accuracy under the situation of the antenna house after not unloading reconditioning, having reduced the influence of positioning error that the cover that repeats to fix up an aerial wire brings, having improved reconditioning precision and working (machining) efficiency greatly measuring accuracy.Utilize the low-angle revolving gear can make high accuracy displacement sensor in measuring process, remain the normal direction of antenna house, guaranteed the detection of antenna house normal direction wall thickness to have ensured good reconditioning precision from principle.Utilize high accuracy displacement sensor that antenna house is carried out on-line measurement, remedied of the influence of machine tool accuracy error, improved the utilization factor of lathe, reduced processing cost reconditioning.It is little that the present invention also has a volume, simple in structure, advantage such as easy to operate concerns generator and test platform for what set up antenna house electricity thickness and reconditioning quality rapidly simultaneously, measure resulting data, also provide reliable foundation for the relation of setting up antenna house electricity thickness and reconditioning quality.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the scheme of installation of the present invention on lathe;
Fig. 3 is a workflow diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
First embodiment of the present invention relates to a kind of on-line measurement device of supporting the accurate reconditioning of antenna house, as shown in Figure 1, comprises low-angle slewing equipment, online displacement detector and signal conditioning package.Wherein, the low-angle slewing equipment is made up of mounting bracket 7, shaft coupling 9, substrate 5, stepper motor 6, driver 14 and motion controller 15; Online displacement detector is made up of displacement transducer 4, sensor controller 10; Signal conditioning package 11 comprises control module and data processing module, control module drives the low-angle slewing equipment, make the detection side of displacement transducer 4 to the normal direction that is in antenna house 3, data processing module calculates normal orientation according to the antenna house molded lines, and displacement transducer 4 measured data are analyzed and evaluated.
As depicted in figs. 1 and 2, the left side that is installed in the antenna house 3 on the grinding machine headstock 1 is a lapping device 2, and the right is the present invention.Mounting bracket 7 in the low-angle slewing equipment is fixed on the platen 13 by screw 8, stepper motor 6 is installed in the inside of support 7 by screw, and link to each other successively with motion controller 15 with driver 14, stepper motor 6 output shafts are connected with substrate 5 by shaft coupling 9 up.Displacement transducer 4 is installed on the substrate 5 of low-angle slewing equipment, and be connected with sensor controller 10 by high-frequency electrical cable 12, sensor controller 10 is set up with signal conditioning package 11 by RS232 and is communicated by letter, after signal conditioning package 11 sets counting of collection and frequency, send to sensor controller 10, sensor controller 10 according to the collection of receiving count and parameter control bit displacement sensor 4 such as frequency is measured, sensor controller 10 will send it back signal conditioning package 11 by displacement transducer 4 measured data and show and store.In order to improve measuring accuracy, the low-angle slewing equipment is after displacement transducer 4 is installed on the substrate 5, and the measuring center point that makes displacement transducer 4 measuring heads and machine tool chief axis centerline are in same level height.
Second embodiment of the present invention relates to a kind of On-line Measuring Method of supporting the accurate reconditioning of antenna house, and its idiographic flow may further comprise the steps as shown in Figure 3:
(1) according to the outline molded lines of antenna house, signal conditioning package utilizes data processing module to calculate X, Z coordinate figure and the normal vector of M measuring point on the antenna house outer mold surface N bar bus, thereby determine displacement sensor ii (i=1,2, ..., N) j (j=1,2 on the bar bus, ..., M) individual measurement point coordinate (X
Ij, Z
Ij) and the angle of revolution ω of low-angle slewing equipment
Ij
(2) according to numerical control order format establishment measurement numerical control program, drive platen (being the residing plane of platen) motion in the XOZ plane, and the drive displacement transducer moves to antenna house i (i=1,2, ..., N) j (j=1,2 on the bar bus, ..., M) individual measurement point coordinate (X
Ij, Z
Ij) locate.
(3) control module of signal conditioning package is according to the angle of revolution ω that calculates
IjSend instruction to motion controller, motion controller drives substrate rotating by the driver drives stepper motor, and substrate drives displacement transducer and rotates an angle ω
IjThereby, make displacement sensor centrally aligned antenna house outer mold surface measured point, guarantee that displacement transducer is measured by antenna house profile normal direction when measuring.
(4) signal conditioning package with the displacement transducer collection count and frequency sends to sensor controller, sensor controller drive displacement sensor carries out data acquisition and processing, and measured data are sent to signal conditioning package shows and store.
(5) displacement transducer runs to next measurement point under numerical control program drives, and go forward side by side line data collection and processing finish until whole measurements.After the antenna house reconditioning, displacement transducer carries out one-shot measurement again to each measurement point of measuring before the antenna house reconditioning.
(6) utilize the data processing module of signal conditioning package, the data of twice measurement before and after the antenna house reconditioning are handled, can obtain the actual reconditioning quality of antenna house.
(7) signal conditioning package is evaluated actual reconditioning quality, if satisfy the reconditioning requirement, then finishes reconditioning; If do not satisfy the reconditioning requirement, then, generate the digital control processing compensation program according to the deviation of actual reconditioning quality and theoretical reconditioning quality, once more antenna house is carried out reconditioning, once more antenna house is measured and evaluated after reconditioning is intact, until reaching the reconditioning requirement, thereby realize the accurate reconditioning of antenna house.
Be not difficult to find that the present invention can carry out the detection of geometric accuracy under the situation of the antenna house after not unloading reconditioning, reduced the influence of positioning error that the cover that repeats to fix up an aerial wire brings, improved reconditioning precision and working (machining) efficiency greatly measuring accuracy.Utilize the low-angle revolving gear can make high accuracy displacement sensor in measuring process, remain the normal direction of antenna house, guaranteed the detection of antenna house normal direction wall thickness from principle, ensured good reconditioning precision, and utilize high accuracy displacement sensor that antenna house is carried out on-line measurement, remedied of the influence of machine tool accuracy error to reconditioning, improve the utilization factor of lathe, reduced processing cost.It is little that the present invention also has a volume, simple in structure, advantage such as easy to operate concerns generator and test platform for what set up antenna house electricity thickness and reconditioning quality rapidly simultaneously, measure resulting data, also provide reliable foundation for the relation of setting up antenna house electricity thickness and reconditioning quality.
Claims (6)
1. on-line measurement device of supporting the accurate reconditioning of antenna house, comprise low-angle revolving gear, online displacement detector and signal conditioning package, it is characterized in that described low-angle revolving gear comprises mounting bracket (7), shaft coupling (9), substrate (5), stepper motor (6), driver (14) and motion controller (15); Described mounting bracket (7) is fixed on the platen (13); Described stepper motor (6) is installed in the described mounting bracket (7), and links to each other successively with motion controller (15) with described driver (14); The output shaft of described stepper motor (6) and links to each other with described substrate (5) by described shaft coupling (9) up; Described online displacement detector comprises interconnective displacement transducer (4) and sensor controller (10); Described displacement transducer (4) is installed on the described substrate (5); Described signal conditioning package (11) comprises control module and data processing module; Described control module links to each other with described motion controller (15), and described data processing module links to each other with described sensor controller (10).
2. the on-line measurement device of the accurate reconditioning of support antenna house according to claim 1 is characterized in that the measuring center point of described displacement transducer (4) measuring head and machine tool chief axis centerline are in same level height.
3. the on-line measurement device of the accurate reconditioning of support antenna house according to claim 1, it is characterized in that, described control module is used to drive described low-angle slewing equipment, makes the detection side of described displacement transducer (4) to the normal direction that is in antenna house (3); Described data processing module calculates normal orientation according to the antenna house molded lines the measured data of described displacement transducer (4) is analyzed and evaluated.
4. the on-line measurement device of the accurate reconditioning of support antenna house according to claim 1 is characterized in that described mounting bracket (7) is fixed on the platen (13) by screw (8); Described stepper motor (6) is installed in the described mounting bracket (7) by screw.
5. the on-line measurement device of the accurate reconditioning of support antenna house according to claim 1 is characterized in that described displacement transducer (4) and sensor controller (10) interconnect by high-frequency electrical cable (12).
6. an On-line Measuring Method of supporting the accurate reconditioning of antenna house is characterized in that, may further comprise the steps:
(1) position and the direction of calculating on-line measurement device: set up workpiece coordinate system, outline molded lines according to antenna house, calculate X, Z coordinate figure and the normal vector of each measurement point of antenna house outer mold surface by the data processing module of signal conditioning package, thus the angle of revolution of X, Z coordinate figure and low-angle slewing equipment when determining displacement sensor;
(2) X of on-line measurement device, Z are to the location: drive the lathe movable workbench by numerical control program, drive displacement transducer and move to specified measurement point position;
(3) normal direction of displacement transducer location: the control module of signal conditioning package sends instruction according to the angle of revolution that calculates to motion controller, motion controller is by the driver drives stepper motor, drive substrate rotating, substrate drives displacement transducer and rotates an angle, thereby make displacement sensor centrally aligned antenna house outer mold surface measured point, displacement transducer is measured by antenna house profile normal direction when guaranteeing to measure simultaneously;
(4) measurement and image data: signal conditioning package is counted and frequency by the collection of sensor controller control bit displacement sensor, displacement transducer is measured described each measurement point respectively before and after the antenna house reconditioning, sensor controller will send to signal conditioning package by the measured data of displacement transducer, and signal conditioning package receives and preserve data;
(5) calculate actual reconditioning quality: by the data processing module of signal conditioning package, the data of twice measurement before and after the antenna house reconditioning are handled, can be obtained the actual reconditioning quality of antenna house;
(6) numerical control program compensation and reconditioning: signal conditioning package is evaluated actual reconditioning quality, if satisfy the reconditioning requirement, then finishes; If do not satisfy the reconditioning requirement, then, generate the digital control processing compensation program according to the deviation of actual reconditioning quality and theoretical reconditioning quality, once more antenna house is carried out reconditioning, once more antenna house is measured, evaluated after reconditioning is intact, till reaching the reconditioning requirement.
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