CN102261890B - Rotary angle measuring device - Google Patents
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- CN102261890B CN102261890B CN 201110098582 CN201110098582A CN102261890B CN 102261890 B CN102261890 B CN 102261890B CN 201110098582 CN201110098582 CN 201110098582 CN 201110098582 A CN201110098582 A CN 201110098582A CN 102261890 B CN102261890 B CN 102261890B
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Abstract
The invention provides a rotation angle measuring device. The rotation angle measuring device comprises a detecting part (10) for measuring the rotation angle of an object (40) to be measured and outputting a phase difference signal; a control section (20) that processes the differential phase signal input from the detection section (10) and outputs status information; and a display section (30) that displays the status information input from the control section (20), and the detection section (10) directly detects the structure (41) to be detected that is uniformly distributed in the circumferential direction of the object (40) to be detected. According to the rotation angle measuring device, the problems of error accumulation and possible code disc damage caused by indirectly measuring the rotation angle of the measured object through the code disc can be solved, intermediate links are avoided, the accuracy of rotation angle measurement is improved, and the measuring work is more reliable.
Description
Technical field
The present invention relates to the mechanical measurement field, in particular to a kind of angle of revolution measurement mechanism.
Background technology
With the engineering machinery of rotatable jib, its slew gear is often by gear drive; The measurement of angle of revolution is very important again to the safety of device support (center of gravity), thus need can be reliably, the device of Measurement accuracy angle of revolution.
We adopt the integral type rotary encoder to measure the angle of revolution traditionally, the coaxial two row's code-discs that arrange on the revolving shaft of testee, then two approach switchs are set as sensor in the code-disc side, sensor setting is in the code-disc outside, and do not rotate with testee.When code-disc rotated with testee, sensor calculated according to angle of revolution and the gyratory directions of the poor phase signals of obtaining from code-disc to testee, and obtains every revolution information of testee.Because sensor is measured the angle of revolution of testee indirectly by code-disc, therefore, in measuring process, can cause error accumulation due to the introducing of code-disc, thereby reduce measuring accuracy.In addition, because sensor is directly measured code-disc, in case code-disc goes wrong, will the angle of revolution measurement of testee be affected greatly so, even cause to complete surveying work.
Summary of the invention
The present invention aims to provide a kind of angle of revolution measurement mechanism, can prevent from indirectly measuring the error accumulation that the testee angle of revolution brings and the code-disc that may occur damaged problem by code-disc, avoid intermediate link, improve the accuracy that the angle of revolution is measured, make surveying work more reliable.
To achieve these goals, according to an aspect of the present invention, provide a kind of angle of revolution measurement mechanism, having comprised: test section, the angle of revolution of measurement object under test, and output difference phase signals; Control section is processed from the poor phase signals of test section input, and output state information; The display part shows that the test section direct-detection is along the circumferential equally distributed detected object structure of object under test from the status information of control section input.
Further, the angle of revolution measurement mechanism also comprises: the warning part is connected to control section, and gives the alarm according to the alerting signal that receives from control section.
Further, the test section comprises: the sensor group; Mounting bracket, the sensor installation group, and be fixedly installed on the outside of object under test.
Further, mounting bracket is bending plate, and the first side plate of bending plate is perpendicular to the radial direction of object under test, and each sensor in the sensor group is arranged on the first side plate by preset space length, and the sensitive surface of each sensor is towards the centre of gyration of object under test.
Further, between each sensor and the first side plate for being threaded.
Further, the sensor group comprises the same type of sensor of at least two or has the aggregation type sensor that multiple signals are exported.
Further, the sensor group also comprises the self check sensor, and the self check sensor is connected to control section.
Further, control section comprises: parameter arranges module, is used for arranging every control parameter; Message processing module is used for identifying and process input signal, and input signal is detected; Logic control and alarm module are used for controlling warning device when the data appearance is abnormal and send alerting signal.
Further, control section also comprises: data memory module is connected to message processing module, and is used for the access historical data.
Further, the display part comprises: control the parameter setting area, be used for inputting every control parameter setting information to control section; Angle and alarm indication are regional, are used for showing angle of revolution information and warning message; The debugging control zone is for the service data that shows the test section.
Further, controlling parameter comprises: structural parameters, angle calculation policing parameter and self check warning policing parameter.
According to technical scheme of the present invention, the test section direct-detection is along the circumferential equally distributed detected object structure of object under test, link in the middle of having avoided, can directly obtain the information of angle of revolution by object under test, reduced the probability of failure of measuring, reduce error accumulation, improved accuracy and reliability that the angle of revolution is measured.The test section comprises the sensor group, obtains angle of revolution information by the poor phase signals of the sensor in the sensor group, is threaded connection between sensor group and mounting bracket, has firm structure, guarantees the accuracy of measuring.The sensor group also comprises the self check sensor, can carry out having improved Security of the system and reliability from detecting to measurement mechanism.
Description of drawings
The accompanying drawing that consists of a part of the present invention is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 shows the structure principle chart of angle of revolution measurement mechanism according to an embodiment of the invention;
Fig. 2 shows the structural representation of angle of revolution measurement mechanism according to an embodiment of the invention;
Fig. 3 shows the decomposition texture schematic diagram of the test section of angle of revolution measurement mechanism according to an embodiment of the invention;
Fig. 4 shows the sensor detection waveform schematic diagram of angle of revolution measurement mechanism according to an embodiment of the invention;
Fig. 5 shows the structure principle chart of the control section of angle of revolution measurement mechanism according to an embodiment of the invention;
Fig. 6 shows the structural representation of the message processing module of angle of revolution measurement mechanism according to an embodiment of the invention; And
Fig. 7 shows the structural representation of the display part of angle of revolution measurement mechanism according to an embodiment of the invention.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
as depicted in figs. 1 and 2, according to embodiments of the invention, the angle of revolution measurement mechanism comprises test section 10, be fixedly installed on the outside of object under test 40, do not rotate with object under test 40, its direct-detection is along the circumferential equally distributed detected object structure 41 of object under test 40, and obtain the information of angle of revolution from detected object structure 41, the output difference phase signals is to control section 20, control section 20 is identified it after receiving poor phase signals, then phase signals poor according to these calculated the various information of obtaining turn state by program, corner angle for example, the information such as direction and logic warning, then export these status informations to display part 30, show various turn state information on display part 30, then adjust by control section 20 according to needed state, obtain the turn state of satisfying the demand.Output terminal at control section 20 also is provided with warning part 50, when control section 20 receives abnormal signal, and identify these abnormal signals in processing procedure after, will send alerting signal to warning part 50, warning part 50 is given the alarm, in order to detect and keep in repair.
Because the test section 10 of angle of revolution measurement mechanism is directly detected the detected object structure 41 of object under test 40, rather than obtain angle of revolution information by code-disc in classic method, avoided intermediate link, thereby can reduce error accumulation in measuring process, improve the accuracy of measuring, obtain serviceability more reliably, the inaccurate or problem that can't measure of the measurement of also having avoided in use the damage due to code-disc to bring.
Display part 30 generally includes the display device that display screen or demonstration meter etc. can reflect revolution information, abnormal state information during warning also can be in the display part 30 shows, so that operating personnel can determine abnormal cause according to the abnormal state information that obtains, be convenient to rapidly removing faults, the normal operation of safeguards system.
Control section 20 also is connected to the control circuit part, and controls the action of topworks by control circuit.This structure with the control section 20 of angle of revolution measurement mechanism with engineering machinery automatically controlled system combination be in the same place, function realizes flexibly, extensibility is good, system is compacter reliable.
As can be seen from Figure 3, test section 10 comprises the mounting bracket 12 of sensor group 11 and sensor installation group 11, mounting bracket 12 says and can not rotate from the overall situation, it is fixedly installed on the periphery of object under test 40, and the detected object structure 41 with respect to object under test 40 arranges, guarantee that with this sensor group 11 maintains static, so that the angle of revolution information of object under test 40 is obtained in the rotation that detects detected object structure 41 by sensor group 11 in object under test 40 rotation processes.Mounting bracket 12 can be various structures, the support that for example is comprised of rod member or the support that is combined into by sheet metal component.In the present embodiment, mounting bracket 12 is bending plate, the first side plate 13 of bending plate is perpendicular to the radial direction of object under test 40, and each sensor in sensor group 11 is arranged on the first side plate by preset space length, and the sensitive surface of each sensor is towards the centre of gyration of object under test 40.The size of mounting bracket 12 is controlled by system and is required the factors such as structure of (to the requirement of revolution signal) and object under test 40 to determine.
It can also be seen that from Fig. 3, in the present embodiment, the detected object structure 41 of this object under test 40 is gear structure, therefore, the induction perpendicular direction of each sensor of sensor group 11 is in the crest top land of each rotary teeth, so that in the turning course of detected object structure 41, each sensor can both obtain uniform and stable revolution signal, thereby the poor phase signals of stable output improves the accuracy of measuring.Preset space length refers to and can satisfy the spacing that each sensor forms poor phase signals, generally, this preset space length refers to arranging along the axial direction of revolving shaft not point-blank of sensor, in order to obtain more obvious poor phase signals, should have along the circumferential direction of object under test 40 suitable distance between each sensor, in order to make the transducing signal of formation have enough phase differential.Within distance between the sensitive surface of sensor and the crest top land of gear structure should remain on certain scope, preferably, this scope was that 1-10mm is with one or several interior numerical value.If too closely can to cause sensor to be disturbed degree higher, affect accuracy of detection, be too far away from and can cause the sensor sensing ability to reduce, also can have influence on the performance of measurement mechanism.
Be provided with the mounting hole of each sensor on the first side plate 13, sensor is fixedly installed on the first side plate 13, can be interference fit between sensor and mounting hole, also can be for being threaded, thereby form stable mounting structure between sensor and mounting bracket 12, can have good performance in testing process, obtain signal more accurately.
Sensor can be quantity more than or equal to the same type of sensor of two, or (aggregation type) sensor of multiple signals output can be arranged; Such as adopt four approach switchs, or the aggregation type sensor of four-way.Preferably, also include the self check sensor in sensor group 11, this self check sensor is connected to control section 20, and self-test signal is passed to control section 20, judges by the detection of control section 20 whether the work of test section 10 is normal.
The self-checking function of measurement mechanism not only can realize by special self check sensor is set in a plurality of sensors, also can use " logic self check " (software self check to signal condition) mode to realize; Can also use the redundancy principle, carry out repeatedly angle calculation and contrast to judge sensor fault and install whether working.Use the mode self check of self check sensor, wherein a kind of detection mode is as follows, supposes that sensor adopts 4 approach switchs, and two are one group and obtain respectively the angle of revolution signal and calculate so, and then the difference of two data of comparison, judge whether device damages, if the difference of two data is consistent, illustrate that measurement mechanism is working properly, if difference occurs abnormal, explanation has one group of sensor to go wrong, and perhaps device goes wrong, and need to change or keep in repair.
As shown in Figure 4, be the detection waveform figure of the sensor of angle of revolution measurement mechanism according to an embodiment of the invention, pulse waveform in figure represents three sensors A, B, the C induction variation on the circumference yardstick, and (pulse high level represents to sense crest top land, low level represents not sense), rather than the time, A, B, each pulse of C are poor phases, can see rising edge (at same position) generation not simultaneously of each pulse; According to the incremental encoder General Principle, take A, B sensor as angle pulse generation signal, measure the angle of revolution, go out the turn state information such as angle of revolution and gyratory directions by system analysis computation according to the poor phase signals between A, B sensor; The C signal can be used as the use of System self-test, the poor phase signals that compares A and C, B and C, if these two poor phase signals all do not change, illustrate that so sensors A, B all use normally, if one of them changes, explanation has a sensor to damage needs to change, and adopts this self test mode can detect the fault (especially to the vital A of measuring angle, B sensor) that in most of situation, the system sensing device damages.Redirect relation and the actual signal of 8 states that can form according to A, B, C the detection of the system failure obtain to judge.Because the scrambler principle has description in numerous undergraduate course teaching materials, no longer in this repetition.
As shown in Figure 5, angle of revolution measurement mechanism according to an embodiment of the invention, its control section 20 comprises that the parameter that every control parameter is set arranges module 21; The message processing module 22 that sets and process input signal and input signal is detected; And in data, logic control and the alarm module 23 that warning device sends alerting signal appears controlling when abnormal, for the ease of comparing, determine whether better to occur abnormal signal, control section 20 also includes the data memory module 24 of access historical data, data memory module 24 is connected to message processing module 22, is convenient to it and deposits new signal in or extract old history parameters in order to carry out Data Comparison from data memory module 24.
as shown in Figure 5 and Figure 6, this control section 20 can be controller, have parameter on this controller module 21 is set, message processing module 22, logic control and alarm module 23 and data memory module 24, message processing module 22 comprises input signal identification module 221 and angle calculation and certainly detects module 222, wherein parameter arranges module 21 and is connected to the angle calculation in message processing module 22 and certainly detects module 222, angle calculation and certainly detect module 222 and be connected to respectively logic control and alarm module 23 and data memory module 24, data memory module 24 is back to data angle calculation and certainly detects module 222.Data memory module 24 can be hard disk.Referring to Fig. 2,10 signals that record enter input signal identification module 221 by input interface from the test section, then the signal that receives is changed, transfer to angle calculation and certainly detect in module 222, through transferring to logic control and alarm module 23 after computing, then select to export the revolution information display section to by output interface according to the signal that receives and divide or send alerting signal.
As shown in Figure 7, display part 30 comprises controls parameter setting area 31, is used for inputting every control parameter setting information to control section 20; Angle and alarm indication zone 32 are used for showing angle of revolution information and warning message; And debugging control zone 33, be used for showing the service data of test section 10.Control parameter and comprise structural parameters, angle calculation policing parameter and self check warning policing parameter, can control the parameter setting area 31 structural parameters typing control system with the engineering equipment of necessity., also can setting device angle calculation strategy and the fault self-checking strategy of operation, have greater flexibility.Debugging control zone 33 is mainly used in auxiliary this device readjusting after assembling or maintenance and repair, and the service data of each sensor of demonstrating as the adjusting foundation, can be opened this function by the debugging control switch that arranges on it.The content of these viewing areas can be deleted according to actual needs, to realize simplifying system under the prerequisite that satisfies system's action need.
From above description, can find out, the above embodiments of the present invention have realized following technique effect: the test section direct-detection is along the circumferential equally distributed detected object structure of object under test, link in the middle of having avoided, can directly obtain the information of angle of revolution by object under test, reduce the probability of failure of measuring, reduced error accumulation, improved accuracy and reliability that the angle of revolution is measured.The test section comprises the sensor group, obtains angle of revolution information by the poor phase signals of the sensor between the sensor group, is threaded connection between sensor group and mounting bracket, has firm structure, guarantees the accuracy of measuring.The sensor group also comprises from detecting sensor, can carry out having improved Security of the system and reliability from detecting to measurement mechanism.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. angle of revolution measurement mechanism comprises:
Test section (10), the angle of revolution of measurement object under test (40), and output difference phase signals;
Control section (20) is processed from the poor phase signals of described test section (10) input, and output state information;
Display part (30) shows from the status information of described control section (20) input,
It is characterized in that,
Described test section (10) comprising:
Sensor group (11), arranging along the axial direction of revolving shaft not point-blank of each sensor of described sensor group (11), described each sensor has suitable distance along the circumferential direction of object under test (40), described each sensor output difference phase signals, described sensor group (11) comprises the same type of sensor of at least two., described same type of sensor comprises sensors A and sensor B;
Mounting bracket (12) is installed described sensor group (11), and is fixedly installed on the outside of described object under test (40);
Described test section (10) direct-detection is along the circumferential equally distributed detected object structure (41) of described object under test (40);
Described sensor group (11) also comprises the self check sensor, described self check sensor is connected to described control section (20), described control section (20) is the middle sensors A of sensor group (11) and the poor phase signals of described self check sensor and the poor phase signals of the middle sensor B of sensor group (11) and described self check sensor relatively, if these two poor phase signals all do not change, determine that described sensors A and described sensor B are normal.
2. angle of revolution according to claim 1 measurement mechanism, is characterized in that, also comprises: the part (50) of reporting to the police is connected to described control section (20), and gives the alarm according to the alerting signal that receives from described control section (20).
3. angle of revolution according to claim 1 measurement mechanism, it is characterized in that, described mounting bracket (12) is bending plate, first side plate (13) of described bending plate is perpendicular to the radial direction of described object under test (40), each sensor in described sensor group (11) is arranged on described the first side plate (13) by preset space length, and the sensitive surface of described each sensor is towards the centre of gyration of described object under test (40).
4. angle of revolution according to claim 3 measurement mechanism, is characterized in that, between described each sensor and described the first side plate (13) for being threaded.
5. the described angle of revolution of any one measurement mechanism according to claim 1 to 4, is characterized in that, described control section (20) comprising:
Parameter arranges module (21), is used for arranging every control parameter;
Message processing module (22) is used for identifying and process input signal, and described input signal is detected;
Logic control and alarm module (23) are used for controlling warning device when the data appearance is abnormal and send alerting signal.
6. angle of revolution according to claim 5 measurement mechanism, is characterized in that, described control section (20) also comprises: data memory module (24) is connected to described message processing module (22), and is used for the access historical data.
7. angle of revolution according to claim 6 measurement mechanism, is characterized in that, described display part (30) comprising:
Control parameter setting area (31), be used for inputting every control parameter setting information to described control section (20);
Angle and alarm indication zone (32) are used for showing angle of revolution information and warning message;
Debugging control zone (33) is for the service data that shows described test section (10).
8. angle of revolution according to claim 7 measurement mechanism, is characterized in that, described control parameter comprises: structural parameters, angle calculation policing parameter and self check warning policing parameter.
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| CN 201110098582 CN102261890B (en) | 2011-04-19 | 2011-04-19 | Rotary angle measuring device |
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| CN102620705A (en) * | 2012-04-01 | 2012-08-01 | 中联重科股份有限公司 | Method, device and system for detecting rotation angle of rotation mechanism and engineering machinery |
| CN103569871B (en) * | 2012-08-06 | 2015-05-13 | 山推工程机械股份有限公司 | Method and device for limiting torque of hoisting equipment and hoisting equipment |
| CN103940398B (en) * | 2014-03-17 | 2016-05-18 | 中联重科股份有限公司 | Rotation angle measuring method, device and system and engineering machinery |
| CN113063898A (en) * | 2021-03-24 | 2021-07-02 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Thermal power station carbon emission monitoring method and system based on block chain |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007055155A1 (en) * | 2007-11-18 | 2009-05-28 | Rudolf Schubach | Sensor structure e.g. brake disc, speed and direction measuring device for e.g. motor cycle, has planar coils, where each coil has breadth corresponding to tooth module of sensor elements and is connected with evaluation circuit |
| CN201575817U (en) * | 2009-12-01 | 2010-09-08 | 秦皇岛港股份有限公司 | Running position detecting and counting device with gear-rack transmission mode |
| CN202057297U (en) * | 2011-04-19 | 2011-11-30 | 长沙中联重工科技发展股份有限公司 | Rotation angle measuring device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007055155A1 (en) * | 2007-11-18 | 2009-05-28 | Rudolf Schubach | Sensor structure e.g. brake disc, speed and direction measuring device for e.g. motor cycle, has planar coils, where each coil has breadth corresponding to tooth module of sensor elements and is connected with evaluation circuit |
| CN201575817U (en) * | 2009-12-01 | 2010-09-08 | 秦皇岛港股份有限公司 | Running position detecting and counting device with gear-rack transmission mode |
| CN202057297U (en) * | 2011-04-19 | 2011-11-30 | 长沙中联重工科技发展股份有限公司 | Rotation angle measuring device |
Non-Patent Citations (2)
| Title |
|---|
| 纪跃波，秦树人."基于差相信号的位移传感器的设计原理".《振动、测试与诊断》.2000,第20卷161-162. |
| 纪跃波,秦树人."基于差相信号的位移传感器的设计原理".《振动、测试与诊断》.2000,第20卷161-162. * |
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