CN202305473U - Device for calibrating marine diesel engine piston ring abrasion monitoring sensor - Google Patents
Device for calibrating marine diesel engine piston ring abrasion monitoring sensor Download PDFInfo
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- CN202305473U CN202305473U CN2011204099592U CN201120409959U CN202305473U CN 202305473 U CN202305473 U CN 202305473U CN 2011204099592 U CN2011204099592 U CN 2011204099592U CN 201120409959 U CN201120409959 U CN 201120409959U CN 202305473 U CN202305473 U CN 202305473U
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- piston ring
- diesel engine
- helmholtz coils
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Abstract
The utility model relates to a device for calibrating a marine diesel engine piston ring abrasion monitoring sensor. The device at least comprises a data acquisition system, a wire collecting box, a computer, a Helmholtz coil, a sensor and a dipolar output direct current power supply, wherein the sensor is fixed by a sensor fixing support and arranged in the middle of the Helmholtz coil; the dipolar output direct current power supply is connected with the Helmholtz coil; and by regulating current of the power supply and changing the magnetic field on the central axis of the Helmholtz coil, the computer is connected with the sensor through the data acquisition system, the wire collecting box and a signal regulating box. The device for calibrating the marine diesel engine piston ring abrasion monitoring sensor has the advantages that a calibrating scheme is provided for the marine diesel engine piston ring abrasion monitoring sensor; the device is high in sensitivity and wide in adjustable range; and through a calibrating experiment, an accurate sensitivity of the sensor can be obtained so as to calibrate the sensor.
Description
Technical field
The utility model relates to magnetoelectricity field and transducer calibration field, more particularly relates to a kind of boat diesel engine piston ring scuffing monitoring sensor caliberating device.
Background technology
At present, can realize the boat diesel engine piston ring scuffing monitoring system that the bright people of grade of the Peng Zhang of Wuhan University of Technology exploitation is arranged of online monitoring ship oceangoing ship piston ring of diesel engine wearing and tearing at home.The sensor of monitoring piston ring state has the characteristics such as affected by environment that are prone to owing to be based on that magnetic sensor makes.And the boat diesel engine piston ring scuffing has resolution high, and characteristics such as wide ranges require the system of its state variation of monitoring to have sensitivity accurately, and definite range ability is arranged.Therefore the demarcation to these systems seems most important.And the caliberating device of marine diesel piston ring scuffing monitoring sensor is not provided at home, can't obtain the sensitivity and the range ability of test macro.
Summary of the invention
The utility model is directed against the deficiency of above-mentioned prior art and a kind of boat diesel engine piston ring scuffing monitoring sensor caliberating device is provided; Be used for detecting the sensitivity of the sensitivity of boat diesel engine piston ring scuffing monitoring sensor with correcting sensor; It is highly sensitive, and adjustable extent is wide.
The utility model solves the problems of the technologies described above the technical scheme that is adopted; Boat diesel engine piston ring scuffing monitoring sensor caliberating device; It is characterized in that: comprise data acquisition system (DAS), cable concentrator, computing machine at least, Helmholtz coils, sensor, bipolarity output DC source
Described sensor is fixed through the sensor fixed support; And place the centre position of Helmholtz coils; Bipolarity output DC source links to each other with Helmholtz coils; Through regulating the size of current of this power supply, the magnetic field on the axis of change Helmholtz coils is big or small, and computing machine links to each other with sensor through data acquisition system (DAS), cable concentrator and signal condition box.
Press such scheme, the sensitive surface of described sensor is parallel with the axis of Helmholtz coils, and the sensitive surface of sensor is in the homogeneity range in Helmholtz coils magnetic field, makes the variation of sensor sensing to uniform magnetic field.
Press such scheme, described Helmholtz coils is the one dimension coil, and its homogeneity range guarantees that greater than the area of the sensitive surface of sensor the magnetic field of sensor sensing is uniform magnetic field.
Press such scheme, the way of output in described bipolarity output DC source is bipolarity output, and its electric current resolution reaches 0.1mA, and power supply is stablized.
Press such scheme, the resolution in the magnetic field that described Helmholtz coils produces can reach 0.001GS, satisfies the requirement of demarcating.
The general thought of the utility model is the device of a demarcation boats and ships piston ring of diesel engine wear monitoring sensor of design; The piston ring scuffing monitoring sensor is to utilize the variation in magnetic field to monitor piston ring scuffing; Therefore when design rating test stand; Intend the wear extent that adopts constant magnetic field instead of piston ring, through the sensitivity of accurate magnetic field value calibration sensor.
The application principle of the utility model:
(1) magnetic field of Helmholtz coils generation
According to Biot-Savart law, the magnetic induction density that current-carrying coil is gone up certain point at axis (through the center of circle and the straight line vertical with coil plane) is:
(2) boat diesel engine piston ring scuffing monitoring sensor is to test the wear of piston-rings degree through the variation of magnetic field size; The size of different magnetic field is represented the different state of wear of piston ring, so the utility model is for coming the sensitivity of calibration sensor through standard Magnetic Field.Because magnetic field is uniform magnetic field and is directly proportional with the size of current of coil midstream warp on the Helmholtz coils axis, can change magnetic field intensity through the size of regulating electric current.The size of every adjusting primary power source electric current; Magnetic field value changes, and treats the output valve of stable back, magnetic field pickup, obtains one group of data; And obtaining the sensitivity of sensor through linear fit, the rule of analyzing test data obtains the linearity measuring range scope of sensor.
The beneficial effect of the utility model is: the utility model is that boat diesel engine piston ring scuffing monitoring sensor provides the demarcation scheme, and this device sensitivity is high, and adjustable extent is wide, and the accurate sensitivity that can access sensor through calibration experiment is with calibrating sensors.
Description of drawings
Fig. 1 is the principle chart of the utility model;
Fig. 2 is the Helmholtz coils structural representation;
Fig. 3 magnetic line of force changes synoptic diagram;
Fig. 4 is a rating test stand schematic diagram;
Fig. 5 is the utility model general structure synoptic diagram;
Among the figure, 1-boat diesel engine piston ring, 2-sensor to be calibrated, 3-bipolarity output DC source, 4-data acquisition system (DAS), 5-cable concentrator, 6-computing machine, 7-Helmholtz coils, 8-sensor fixed support, 9-sensor.
Embodiment
Boat diesel engine piston ring scuffing monitoring sensor caliberating device is characterized in that: comprise data acquisition system (DAS) (4), cable concentrator (5), computing machine (6) at least, and Helmholtz coils (7), sensor (9), bipolarity output DC source (3),
Described sensor (9) is fixing through sensor fixed support (8); And place the centre position of Helmholtz coils; Bipolarity output DC source (3) links to each other with Helmholtz coils; Through regulating the size of current of this power supply, the magnetic field on the axis of change Helmholtz coils is big or small, and computing machine links to each other with sensor (9) through data acquisition system (DAS) (4), cable concentrator (5) and signal condition box.
Press such scheme, the sensitive surface of described sensor is parallel with the axis of Helmholtz coils, and the sensitive surface of sensor is in the homogeneity range in Helmholtz coils magnetic field, makes the variation of sensor sensing to uniform magnetic field.
Press such scheme, described Helmholtz coils is the one dimension coil, and its homogeneity range guarantees that greater than the area of the sensitive surface of sensor the magnetic field of sensor sensing is uniform magnetic field.
Press such scheme, the way of output in described bipolarity output DC source is bipolarity output, and its electric current resolution reaches 0.1mA, and power supply is stablized.
Press such scheme, the resolution in the magnetic field that described Helmholtz coils produces can reach 0.001GS, satisfies the requirement of demarcating.
Below in conjunction with the embodiment accompanying drawing the utility model is described further:
(1) the magnetoresistive transducer chip structure forms because boat diesel engine piston ring scuffing monitoring sensor is based on; The size in magnetic field has reflected the degree of wear of piston-rings; Therefore design the test-bed of calibration sensor, need the adjustable instrument in a kind of magnetic field of structure.As shown in Figure 1; The standard Magnetic Field that the utility model utilizes Helmholtz coils to produce is demarcated boats and ships piston ring of diesel engine wear monitoring sensor; Utilize the stable electric current adjustable current source of power supply electric current to be provided, thereby change the magnetic field size that Helmholtz coils produces through regulating source current to Helmholtz coils.
(2) be the Helmholtz coils structural representation like Fig. 2, utilize the field intensity size that mid point produces on the Helmholtz coils axis to demarcate boats and ships piston ring of diesel engine wear monitoring sensor, the size of wherein putting field intensity is:
When the electric current of Helmholtz coils changed, the magnetic field intensity at hub of a spool point place also changed.
(3) Fig. 3-4 is the utility model schematic diagram of structure; Boat diesel engine piston ring scuffing monitoring sensor is the permanent magnet magnetized piston ring that utilizes sensor internal; And the magnetic field that piston ring after the magnetization and sensor internal permanent magnet produce is superimposed, therefore closes the information that contains piston ring scuffing in the magnetic field, when piston ring to-and-fro movement process sensor; The piston ring cutting magnetic line, the magnetic line of force changes like Fig. 3.The wear of piston-rings degree is judged through the size in this magnetic field in the magnetic field that the magnetoresistive transducer chip induction directions X of sensor internal changes.Therefore the utility model sensor placement location when building is as shown in Figure 4, and the sensitive surface of sensor is parallel with the axis of Helmholtz coils.Be sensor monitors be the magnetic field of axis direction, and this magnetic field is corresponding, promptly corresponding with the wear of piston-rings amount with the magnetic field of directions X shown in Figure 3.
(4) Fig. 5 is the general structure synoptic diagram of the utility model; The place, axis, magnetic field that Helmholtz coils produces is maximum; Magnetic field reduces during off-axis, therefore when the making of Helmholtz coils, requires its homogeneity range (magnetic field in the homogeneity range changes in certain error range) area greater than sensor sensing face area.For the magnetic field that guarantees sensor sensing is the magnetic field of axis center position, this utility model requires the sensor sensing face to be positioned over homogeneity range when sensor installation.Through regulating direct supply, change the magnetic field size of center, Helmholtz coils axis.The magnetic field of the different sizes of sensor monitors, the signal of output has computing machine through the signal condition box by signal acquiring system collection and input.
(5) signal of acquisition system collection is through filter amplifying processing; Extract the mean value of the sensor output voltage under each corresponding current, calculate the standard Magnetic Field size of different electric flow valuve correspondence through the magnetic field calculation formula of Helmholtz coils axis mid point.Each standard Magnetic Field value is corresponding with magnitude of voltage, obtains corresponding slope through least square fitting, i.e. the sensitivity of boat diesel engine piston ring scuffing monitoring sensor, and obtain its linearity measuring range scope through analyzing test data.
Claims (5)
1. boat diesel engine piston ring scuffing monitoring sensor caliberating device; It is characterized in that: comprise data acquisition system (DAS) (4), cable concentrator (5), computing machine (6) at least; Helmholtz coils (7), sensor (9), bipolarity output DC source (3); Described sensor (9) is fixing through sensor fixed support (8); And placing the centre position of Helmholtz coils, bipolarity output DC source (3) links to each other with Helmholtz coils, through regulating the size of current of this power supply; Magnetic field size on the axis of change Helmholtz coils, computing machine links to each other with sensor (9) through data acquisition system (DAS) (4), cable concentrator (5) and signal condition box.
2. by the described boat diesel engine piston ring scuffing of claim 1 monitoring sensor caliberating device; The sensitive surface that it is characterized in that described sensor is parallel with the axis of Helmholtz coils; And the sensitive surface of sensor is in the homogeneity range in Helmholtz coils magnetic field, makes the variation of sensor sensing to uniform magnetic field.
3. by claim 1 or 2 described boat diesel engine piston ring scuffing monitoring sensor caliberating devices; It is characterized in that described Helmholtz coils is the one dimension coil; And its homogeneity range guarantees that greater than the area of the sensitive surface of sensor the magnetic field of sensor sensing is uniform magnetic field.
4. by claim 1 or 2 described boat diesel engine piston ring scuffing monitoring sensor caliberating devices, the way of output that it is characterized in that described bipolarity output DC source is bipolarity output, and its electric current resolution reaches 0.1mA, and power supply is stablized.
5. by the described boat diesel engine piston ring scuffing of claim 1 monitoring sensor caliberating device, it is characterized in that the resolution in the magnetic field that described Helmholtz coils produces can reach 0.001GS, satisfy the requirement of demarcating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204099592U CN202305473U (en) | 2011-10-25 | 2011-10-25 | Device for calibrating marine diesel engine piston ring abrasion monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204099592U CN202305473U (en) | 2011-10-25 | 2011-10-25 | Device for calibrating marine diesel engine piston ring abrasion monitoring sensor |
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| Publication Number | Publication Date |
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| CN202305473U true CN202305473U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204099592U Expired - Lifetime CN202305473U (en) | 2011-10-25 | 2011-10-25 | Device for calibrating marine diesel engine piston ring abrasion monitoring sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764800A (en) * | 2015-04-20 | 2015-07-08 | 武汉华宇一目检测装备有限公司 | Residual magnetism flaw detection method and device for piston rings based on series-connection closed type magnetization |
| CN106645385A (en) * | 2016-09-23 | 2017-05-10 | 中国石油大学(华东) | Petroleum string defect fast detecting probe based on Helmholtz coils |
| CN113030828A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Alternating magnetometer verification system and method |
| CN114184989A (en) * | 2021-12-01 | 2022-03-15 | 中国科学院合肥物质科学研究院 | Magnetic probe amplitude-frequency and phase-frequency calibration system and method based on Helmholtz coil |
-
2011
- 2011-10-25 CN CN2011204099592U patent/CN202305473U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764800A (en) * | 2015-04-20 | 2015-07-08 | 武汉华宇一目检测装备有限公司 | Residual magnetism flaw detection method and device for piston rings based on series-connection closed type magnetization |
| CN104764800B (en) * | 2015-04-20 | 2017-07-28 | 武汉华宇一目检测装备有限公司 | One kind is based on the series connection magnetized piston ring remanent magnetism method of detection of closed type and device |
| CN106645385A (en) * | 2016-09-23 | 2017-05-10 | 中国石油大学(华东) | Petroleum string defect fast detecting probe based on Helmholtz coils |
| CN113030828A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Alternating magnetometer verification system and method |
| CN114184989A (en) * | 2021-12-01 | 2022-03-15 | 中国科学院合肥物质科学研究院 | Magnetic probe amplitude-frequency and phase-frequency calibration system and method based on Helmholtz coil |
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Granted publication date: 20120704 |
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| CX01 | Expiry of patent term |