CN2088691U - Portable ferromagnetic abrasive particle measuring instrument - Google Patents
Portable ferromagnetic abrasive particle measuring instrument Download PDFInfo
- Publication number
- CN2088691U CN2088691U CN 91203552 CN91203552U CN2088691U CN 2088691 U CN2088691 U CN 2088691U CN 91203552 CN91203552 CN 91203552 CN 91203552 U CN91203552 U CN 91203552U CN 2088691 U CN2088691 U CN 2088691U
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- CN
- China
- Prior art keywords
- oscillator
- measuring head
- bridge
- abrasive particle
- portable
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a ferromagnetic abrasive particle measuring instrument which measures the abrasive dust content in the lubricating oil sample to judge the worn degree of the machine parts and the machine run condition and predicates the remaining life of the machine, comprising a measuring head with an unbalance induction bridge, an oscillator which provides the unbalance induction bridge with excitation source, a comparator which compares the output of the unbalance induction bridge and the output of the oscillator and a display which displays the measurement structure. The ferromagnetic abrasive particle measuring instrument can carry out field measurement and has the advantages of convenience, reliability and direct-viewing.
Description
The utility model relates to a kind of ferromagnetic abrasive particle tester of measuring abrasive dust content in the lubricating oil with the residual life of the degree of wear of judging machine parts and machine run situation, prediction machine.
Existing lubricant abrasive dust content measuring technology has analytic ferrographic method and magnetic barrier inspection technique.Analysis mode, direct-reading and rotary-ferrograph are arranged in the analyzing iron spectrum technology, the above two are to utilize high-intensity magnetic field, the glass tube that tilts to lay is injected in oil sample dilution back, under the action of a magnetic field, fluid is being carried residue secretly and is being flow through forward, and residue speed of sedimentation in glass tube depends on the many factors such as size, shape, density and magnetic susceptibility and oil viscosity etc. of itself.The optical density meter carries out reading and is direct-reading, if need further to determine the form and the composition of residue, available microscope is observed, and this is analysis mode.Rotary-ferrograph is fluid to be dripped on glass in what rotate with magnetic field, utilizes centrifugal force that ferromagnetic material is got rid of, the ferromagnetism abrasive dust then under the effect of magnetic field force precipitated down, then with microscopic examination or optical density meter reading.
The magnetic barrier inspection technique is to insert in the pipeline of lubricating system with magnetic chock plug, collects the residue in the lubricating oil, the with the naked eye size of Direct observation residue, quantity and shape, the abrasion condition of judgment device.
The ferrograph analyzer shortcoming is its cost height, and environment for use requires high, and operating personnel require to possess certain quality and experience, is unfavorable for that the scene tests.And magnetic barrier checks that rule is too simple, can not directly obtain data such as the degree of wear, can not differentiate the slight change of machine state, easily erroneous judgement.
The purpose of this utility model is to provide a kind of cost low, and environment for use is less demanding, is convenient to test at the scene and can directly obtain the portable ferromagnetic abrasive particle shape tester of test data.
The utility model is achieved by the following technical solution.Ferromagnetic abrasive particle tester of the present utility model comprises measuring head and signal Processing and display part, described measuring head contains the inductance bridge of a non-equilibrium state, the measurement face of measuring head is smooth smooth, signal Processing and display part comprise oscillator, filter amplifier, half-wave rectifier, comparer, direct current amplifier and display, the oscillator signal excitation that described uneven inductance bridge is produced by oscillator, comparer compares the positive half-wave output signal of the uneven inductance bridge after filter amplifier amplifies and the negative half-wave oscillator signal that the oscillator after the half-wave rectifier rectification produces, and exports a direct current signal and amplify with driving display demonstration measurement result through direct current amplifier.
During measurement, to lubricate oil sample earlier and place test tube, by adding thermal oscillation etc. abrasive dust is evenly distributed, pour into then in the filtration unit that is placed with the filter paper film, the contained abrasive dust of lubricating oil promptly is deposited on this paper film like this, this filter paper film is taken off on the measuring head that places tester, owing to contain the inductance value that the filter paper of ferromagnetic abrasive dust will change telefault, the electric bridge output signal is increased, can come the abrasion condition of test machine by this instrument like this.
The ferromagnetic abrasive particle tester that uses the utility model to provide is tested under the condition at the scene, and can directly read measurement result, has reduced the error of artificial judgement, and is easy to use and reliable.
Fig. 1 is the block diagram of the utility model circuit part;
Fig. 2 (a) shows the circuit of measuring bridge, filter amplifier and comparer among Fig. 1;
Fig. 2 (b) shows the oscillator 3 among Fig. 1 and the circuit of amplifier 4;
Fig. 2 (c) shows the direct current amplifier 6 among Fig. 1 and the circuit of display 7;
Fig. 3 is the topology view of tester of the present utility model;
Fig. 4 is the panel figure of the utility model tester.
Describe the utility model in detail below in conjunction with accompanying drawing:
Fig. 1 is the block diagram of the utility model circuit part, it comprise measuring bridge 1, to the output of measuring bridge 1 carry out filter amplifier 2 that filtering amplifies, for measuring bridge provide pumping signal oscillator 3, measuring bridge 1 output signal after handling through filter amplifier 2 and oscillator 3 output signals after amplifier 4 is handled compared and export comparison signal drive to the comparer 5 of direct current amplifier 6 with by direct current amplifier 6 output signals, show the display 7 of measurement result.Measuring bridge 1 is encapsulated in the measuring head (as described later in detail).Under normal circumstances, be when not having other ferromagnetic materials around measuring head no tested filter disc in surface or the measuring head, comparer 5 is output as zero, when the filter disc that contains ferromagnetic abrasive dust places measuring head measuring bridge top, electric bridge 1 output signal increases, the negative half-wave voltage signal that the positive half-wave electric bridge signal after amplifying rectification will produce greater than oscillator this moment, comparer 5 outputs one and the proportional direct current signal of ferromagnetic abrasive dust content are after direct current amplifier 6 amplifications, by display 7 display result.
Fig. 2 (a)-(c) shows of block diagram shown in Figure 1 can implement circuit diagram.Fig. 2 (a) shows the circuit of measuring bridge shown in Figure 11, filter amplifier 2 and comparer 5, and electric bridge 1 is the inductance bridge of a non-equilibrium state, and adjacent two arms of electric bridge one side are the measurement coil L that contains iron Gan magnetic core
MWith balancing coil L
B, two winding inductance quantities equate that the electric bridge opposite side is the precision resistance R of two high-temperature stability factor
1And R
2, in resistance R
1And R
2' between the serial connection one precision resistor VR, the sliding end of self-potential device VR is two resistance R
1R
2Be divided into two brachium pontis with potentiometer VR.Regulator potentiometer R can guarantee that two resistance brachium pontis resistances equate.Filter amplifier 2 among Fig. 1 comprises operational amplifier IC
1, IC
2, IC
3And IC
4, IC
1Constitute differential amplifier circuit, IC with some resistance capacitances
2And IC
3Constitute bandpass filtering amplifying circuit, IC with some resistance capacitances
4Constitute accurate half-wave rectifying circuit with some resistance capacitances, comparer 5 comprises operational amplifier IC
5, IC
5Constitute comparator circuit, operational amplifier IC in the present embodiment with some resistance
1-IC
5All adopt the LM308 precision operational-amplifier.
Referring to Fig. 2 (b), Fig. 2 (b) shows the circuit of oscillator shown in Figure 13 and amplifier 4, and oscillator is by transistor BG1, BG2 and operational amplifier IC
6And the bridge oscillator circuit of some resistance capacitances compositions, its oscillation frequency is 10KHz ± 200Hz.Amplifier 4 comprises operational amplifier IC
7And IC
8Operational amplifier IC
7Constitute inverter circuit, IC with some resistance capacitances
8Constitute accurate half-wave rectifying circuit with some resistance capacitances.The oscillator signal that this amplification rectification circuit produces oscillator carries out anti-phase and half-wave rectification and export comparer 5 to and compare with the signal that measuring bridge 1 produces.Potentiometer WR among the figure
1Can be used for changing the size that oscillator 3 exports comparer 5 signals to, as the school zero potential device under the normal condition.
Referring to Fig. 2 (c), Fig. 2 (c) shows direct current amplifier shown in Figure 16 and display 7.Direct current amplifier 6 comprises integrated operational amplifier IC
9With some resistance capacitances, the output signal of comparer 5 is amplified with driving display 7.Show device in the present embodiment and adopt reometer A, direct current amplifier 6 also comprises some potentiometer diode capacitance resistance that play automatic compensating action at zero point and plays the some resistance and the K switch of range transformation, K switch range difference of display then on different positions.
Referring to Fig. 3, Fig. 3 is a ferromagnetic abrasive particle tester topology view of the present utility model; 20 is measuring head among the figure, and whole measuring head 20 devices are measured coil L with the insulating gel encapsulation in the measuring head 20 on panel
MWith balancing coil L
B, measuring head 20 can be made by nylon 66 materials such as grade, and measurement face should be smooth smooth, and the cover plate 19 of measuring head 20 is by being connected with measuring head 20 as articulating devices such as hinge 18.Among the figure, 8 is battery case, and all element boards among Fig. 2 all are installed in the housing 4.
Fig. 4 is the faceplate view of ferromagnetic abrasive particle tester of the present utility model; 1 for the zeroing knob among the figure, is the potentiometer WR among Fig. 2 (b)
1, 2 is range switch, is the K switch among Fig. 2 (c), 3 for proofreading and correct knob, is the potentiometer WR among Fig. 2 (c)
2, 5 is amp gauge A(display).Potentiometer WR
2Can change the output quantity of direct current amplifier 6, can proofread and correct gauge outfit (display) with the standard filter disc.
When using this instrument, energized is selected suitable range, returns to zero with zeroing knob 1, and the standard filter disc is placed on the measuring head 20, carries out the full scale adjustment with proofreading and correct knob 3, so just can normally measure.
Claims (4)
1, a kind of portable ferromagnetic abrasive particle tester, comprise measuring head and signal Processing and display part, it is characterized in that described measuring head contains a uneven inductance bridge, the measurement face of measuring head is smooth smooth, signal Processing and display part comprise oscillator, filter amplifier, half-wave rectifier, comparer, direct current amplifier and display, the oscillator signal excitation that described uneven inductance bridge is produced by oscillator, comparer compares the output signal of the uneven inductance bridge after filter amplifier amplifies and the oscillator signal that the oscillator after the half-wave rectifier rectification produces, and exports a direct current signal and amplify with driving display demonstration measurement result through direct current amplifier.
2, portable ferromagnetic abrasive particle tester as claimed in claim 1, adjacent two arms that it is characterized in that described uneven inductance bridge one side are the measurement coil peace weighing apparatus coil that contains ferrite core, two winding inductance quantities equate that the electric bridge opposite side is two substitutional resistances.
3, portable ferromagnetic abrasive particle tester as claimed in claim 2 is characterized in that two resistance brachium pontis inter-burst of described uneven inductance bridge connect a potentiometer, and the sliding end of self-potential device is divided into two brachium pontis to two resistance and potentiometer.
4, survey instrument as claim 1 or 2 or 3 described portable ferromagnetic abrasive particles, the structure that it is characterized in that measuring head is that uneven inductance bridge is packaged in the measuring head that material is a nylon 66.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203552 CN2088691U (en) | 1991-03-07 | 1991-03-07 | Portable ferromagnetic abrasive particle measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91203552 CN2088691U (en) | 1991-03-07 | 1991-03-07 | Portable ferromagnetic abrasive particle measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2088691U true CN2088691U (en) | 1991-11-13 |
Family
ID=4913846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91203552 Expired - Lifetime CN2088691U (en) | 1991-03-07 | 1991-03-07 | Portable ferromagnetic abrasive particle measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2088691U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344535A (en) * | 2013-06-09 | 2013-10-09 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
| CN103728343A (en) * | 2014-01-15 | 2014-04-16 | 南京工业大学 | Online detection method for scrap iron content in pivoting support lubricating grease and lubricating grease online detection device |
| CN105300863A (en) * | 2015-11-20 | 2016-02-03 | 北京至感传感器技术研究院有限公司 | Detection device and detection method for ferromagnetic abrasive grains in liquid oil |
| CN105866198A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Wear particle online monitoring device using filtering, centrifuge and adjacent capacitance |
| CN105866197A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Wear particle online monitoring device using filtering, centrifuge and adjacent capacitance |
| CN105891277A (en) * | 2016-05-12 | 2016-08-24 | 绍兴文理学院 | Wear particle monitoring system adopting filtering, centrifugalization and adjacent capacitance |
| CN105973949A (en) * | 2016-05-12 | 2016-09-28 | 绍兴文理学院 | System for monitoring wear particles on line by virtue of hydraulic filtration, centrifugation and adjacent capacitance |
| CN110018094A (en) * | 2019-05-17 | 2019-07-16 | 大连海事大学 | Magnetic core multi-parameter abrasive grain sensing device is set in one kind |
-
1991
- 1991-03-07 CN CN 91203552 patent/CN2088691U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344535A (en) * | 2013-06-09 | 2013-10-09 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
| CN103344535B (en) * | 2013-06-09 | 2015-04-22 | 桂林电子科技大学 | Oil metal abrasive particles online monitoring system |
| CN103728343A (en) * | 2014-01-15 | 2014-04-16 | 南京工业大学 | Online detection method for scrap iron content in pivoting support lubricating grease and lubricating grease online detection device |
| CN103728343B (en) * | 2014-01-15 | 2016-04-20 | 南京工业大学 | The online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease |
| CN105300863A (en) * | 2015-11-20 | 2016-02-03 | 北京至感传感器技术研究院有限公司 | Detection device and detection method for ferromagnetic abrasive grains in liquid oil |
| CN105866198A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Wear particle online monitoring device using filtering, centrifuge and adjacent capacitance |
| CN105866197A (en) * | 2016-05-12 | 2016-08-17 | 绍兴文理学院 | Wear particle online monitoring device using filtering, centrifuge and adjacent capacitance |
| CN105891277A (en) * | 2016-05-12 | 2016-08-24 | 绍兴文理学院 | Wear particle monitoring system adopting filtering, centrifugalization and adjacent capacitance |
| CN105973949A (en) * | 2016-05-12 | 2016-09-28 | 绍兴文理学院 | System for monitoring wear particles on line by virtue of hydraulic filtration, centrifugation and adjacent capacitance |
| CN110018094A (en) * | 2019-05-17 | 2019-07-16 | 大连海事大学 | Magnetic core multi-parameter abrasive grain sensing device is set in one kind |
| CN110018094B (en) * | 2019-05-17 | 2022-02-08 | 大连海事大学 | Multi-parameter abrasive particle sensing device with built-in magnetic core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |