CN206269894U - urea liquid level sensor test system - Google Patents
urea liquid level sensor test system Download PDFInfo
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- CN206269894U CN206269894U CN201621339927.9U CN201621339927U CN206269894U CN 206269894 U CN206269894 U CN 206269894U CN 201621339927 U CN201621339927 U CN 201621339927U CN 206269894 U CN206269894 U CN 206269894U
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- guide rail
- product
- grating
- liquid level
- level sensor
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Abstract
The utility model discloses a kind of urea liquid level sensor test system, it includes marble platform, grating scale；Grating scale is fitted in marble platform；Grating scale is provided with grating ruler reading head；Grating ruler reading head is connected with grating read module；Line slideway is located in marble platform；Line slideway is provided with guide rail slide block；Guide rail slide block is rotated with guide rail leading screw and is connected；The termination of guide rail leading screw is connected with stepper motor；Stepper motor is connected with motor control module；Grating ruler reading head, ball float are separately fixed at the two ends of guide rail slide block；Grating scale, line slideway, product mounting bracket are parallel to each other；Product mounting bracket is provided with urea liquid level sensor product；The sensor output of urea liquid level sensor product is connected with universal meter；Grating read module, motor control module, universal meter are connected with control terminal respectively；The high precision of the utility model Product checking, production efficiency is high, reduce Product checking man-hour, reduce cost of goods manufactured.
Description
Technical field
The utility model is related to urea liquid level sensor detection technique field, and in particular to a kind of urea liquid level sensor is surveyed
Test system.
Background technology
Urea liquid level sensor is to apply the urea level in the SCR system in diesel trucks to measure, installed in urea
On tank, the stainless steel tube insertion urea liquid of lower end, wherein the channel interior for bending is the coolant of automobile, for molten to urea
Liquid is heated, and prevents icing of urea solution in the case of low temperature, the pipeline with ball float, and there is reed switch circuit inside, sensing float
Diverse location, the signal of measurement output urea level.
In the stainless steel tube with float built with a strip circuit board, one group of tongue tube sensing is welded on circuit board
The position of float, encapsulates permanent magnet on float, it is ensured that have tongue tube by adhesive in different positions in float, each
There is the series resistance of different resistances between tongue tube.
When float is bottom-up mobile, the tongue tube of diverse location is equivalent to switch equally by adhesive, adhesive posterior end
All resistance are shorted, and the output valve of whole resistance is all resistant series of upper end.The bottom-up movement of float, tongue tube according to
Secondary conducting, the resistance signal of output diminishes successively, because float is to change position with the change of urea level, so final electricity
Resistiveization can reflect the change of urea level.Ball float will meet client to resistance demand in diverse location, total output resistance.
So the detection for urea liquid level sensor function is, it is necessary to make the bottom-up movement of ball float, and measure defeated simultaneously
Go out the change of resistance, see whether position meets the corresponding form of customer demand with the corresponding relation that resistance is exported.Most traditional inspection
Survey method is：Using a scale as reference, mobile ball float measures corresponding resistance in diverse location with universal meter resistance grade
Value.
This detection method inefficiency, accuracy of detection is not high, because the sensitivity of each tongue tube induced field is different,
Or wherein some tongue tube failure, or the failure of some series resistance etc., such manual operation detection is difficult hair
Existing, any one failure causes product unqualified.
The common failure mode of urea liquid level sensor has：1st, wherein certain tongue tube failure, causes a certain section of resistance defeated
Go out unchanged；2nd, wherein certain resistance failure, causes a certain section of resistance output valve deviation excessive；3rd, tongue tube sensitivity difference
Greatly, cause the spacing difference of resistance variations excessive, such as standard is that 20mm intervals resistance changes, because sensitivity or dry
Reed pipe welding position difference, causes the corresponding interval of the resistance having to be 15mm, and corresponding interval of some resistances is 28mm, is so led
Cause the measurement error of client's urea level to become big, influence certainty of measurement；4th, there is rosin joint, dry joint etc. in tongue tube or series resistance
Cause a certain section of resistance unstable.
In the production process of urea liquid level sensor product, the above-mentioned failure mode of traditional method of testing is difficult hair
It is existing, even if being found that, it is also difficult to track the problem of specific which element.
Utility model content
The purpose of this utility model is the defect and deficiency for prior art, there is provided a kind of simple structure, design are closed
Reason, urea liquid level sensor test system easy to use.
To achieve the above object, the technical solution adopted in the utility model is：It includes marble platform, grating scale, straight
Line guide rail, guide rail leading screw, guide rail slide block, stepper motor, product mounting bracket, urea liquid level sensor product, ball float, general-purpose
Table；Described grating scale is fitted in marble platform；Grating scale is provided with grating ruler reading head；Grating ruler reading head reads with grating
Module is connected；Line slideway is located in marble platform；Line slideway is located at the side of grating scale；Line slideway is provided with guide rail
Sliding block；Guide rail slide block is rotated with guide rail leading screw and is connected；The termination of guide rail leading screw is connected with stepper motor；Stepper motor and motor control
Molding block is connected；Grating ruler reading head, ball float are separately fixed at the two ends of guide rail slide block；The side of line slideway is provided with product installation
Support；Grating scale, line slideway, product mounting bracket are parallel to each other；Product mounting bracket is provided with urea liquid level sensor product
Product；The sensor output of urea liquid level sensor product is connected with universal meter；Grating read module, motor control module, ten thousand
It is connected with control terminal by data wire respectively with table；Control terminal is provided with software systems；
Preferably, two brackets are slidably connected in described product mounting bracket；Bracket and product mounting bracket
Junction is provided with tightening nut；The two ends of urea liquid level sensor product are separately fixed on two brackets；
Preferably, described universal meter is the universal meter of 6 half；
Preferably, described software systems read system, testing and control comprising ball float position control system, grating scale position
System, quick hop detecting system.
After said structure, the utility model has the beneficial effect that：Urea liquid level sensor described in the utility model is surveyed
Test system, the high precision of urea liquid level sensor Product checking, production efficiency are high, improve product quality, reduction Product checking work
When, reduce cost of goods manufactured, and have the advantages that simple structure, set rationally, low manufacture cost.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Description of reference numerals：
1st, marble platform；2nd, grating scale；3rd, line slideway；4th, guide rail leading screw；5th, grating ruler reading head；6th, guide rail slide block；
7th, stepper motor；8th, grating read module；9th, motor control module；10th, universal meter；11st, data wire；12nd, control terminal；13、
Bracket；14th, ball float；15th, urea liquid level sensor product；16th, product mounting bracket.
Specific embodiment
Below in conjunction with the accompanying drawings, the utility model is further described.
Referring to shown in Fig. 1, the technical scheme that this specific embodiment is used is：It comprising marble platform 1, grating scale 2,
Line slideway 3, guide rail leading screw 4, guide rail slide block 6, stepper motor 7, product mounting bracket 16, urea liquid level sensor product 15,
Ball float 14, universal meter 10；Described grating scale 2 is fitted in marble platform 1；Grating scale 2 is provided with grating ruler reading head 5；Light
Grid ruler reading head 5 is connected with grating read module 8；Line slideway 3 is located in marble platform 1；Line slideway 3 is located at grating scale 2
Side；Line slideway 3 is provided with guide rail slide block 6；Guide rail slide block 6 is rotated with guide rail leading screw 4 and is connected；The termination of guide rail leading screw 4
It is connected with stepper motor 7；Stepper motor 7 is connected with motor control module 9；Grating ruler reading head 5, ball float 14 are separately fixed at guide rail
The two ends of sliding block 6；The side of line slideway 3 is provided with product mounting bracket 16；Grating scale 2, line slideway 3, product mounting bracket
16 are parallel to each other；Product mounting bracket 16 is provided with urea liquid level sensor product 15；The biography of urea liquid level sensor product 15
Sensor output end is connected with universal meter 10；Grating read module 8, motor control module 9, universal meter 10 pass through data wire 11 respectively
It is connected with control terminal 12；Control terminal 12 is provided with software systems；
Preferably, two brackets 13 are slidably connected in described product mounting bracket 16；Bracket 13 is installed with product
The junction of support 16 is provided with tightening nut；The two ends of urea liquid level sensor product 15 are separately fixed on two brackets 13；
Preferably, described universal meter 10 is the universal meter of 6 half；
Preferably, described software systems read system, testing and control comprising ball float position control system, grating scale position
System, quick hop detecting system.
This specific embodiment uses marble platform 1, grating scale 2 is placed directly against on Dali flag platform 1, with straight line
Guide rail 3 and the keeping parallelism of product mounting bracket 16, marble platform 1 have excellent stability, can improve to greatest extent
Certainty of measurement, reduces the measurement error that vibrations, temperature change etc. are caused.
Using grating scale 2 as benchmark, the certainty of measurement of grating scale 2 can reach 1um to this specific embodiment, by grating
Ruler reading head 5 is fixed on guide rail slide block 6, can accurately measure the position of guide rail slide block 6, and guide rail slide block 6 is again solid with ball float 14
It is fixed, drive ball float 14 to be slided on urea liquid level sensor product 15, so as to accurately measure the position of ball float 14.
This specific embodiment uses the universal meter 10 of high-precision 6 half, due to urea liquid level sensor product 15
Output is resistance signal, and universal meter 10 receives resistance signal, can intuitively see the resistance of test, while universal meter 10 will
Data are sent to control terminal 12, and test data is saved.
Motor control module 9, grating read module 8 are connected with control terminal 12 in this specific embodiment, receive control
Terminal 12 is instructed, and Driving Stepping Motor 7 is accurately controlled the motion of guide rail slide block 6, and reads guide rail slide block by grating ruler reading head 5
6 position, then the accurate data of position is sent back into control terminal 12.
This specific embodiment uses product mounting bracket 16, and the bracket 13 in product mounting bracket 16 can be according to urea
The length adjustment of liquid level sensor product 15, urea liquid level sensor product 15 is built on stilts parallel with line slideway 3 and fixed, lead
Rail sliding block 6 drives ball float 14 to move left and right.
The operating method of this specific embodiment is comprised the following steps：
First, system is read in operation ball float position control system and grating scale position, and ball float 14 is moved into measurement start bit
Put, read the position data that current grating scale 2 is returned, and current location is reset, and set the theory movement speed of ball float 14
Angle value and acceleration factor value；
2nd, semi-finished product test：Quick hop detecting system is run, universal meter 10 is initialized, the data of universal meter 10 are read,
Whether access control terminal 12 is connected normally with universal meter 10, presets the velocity amplitude and number of test points of the movement of ball float 14, leads
Whether rail sliding block 6 drives ball float 14 continuously to move, while universal meter 10 reads data, output can be found within the most short time
It is abnormal, for the test of semi-finished product in production process.
3rd, the circuit board module test in production process or finished product test：Testing results control system, initializes universal meter
10, the data of universal meter 10 are read, whether access control terminal 12 is connected normally with universal meter 10, setting product type, measurement
Resistance error, product that range, the points for needing test, the spacing distance of test point, the position offset of starting, measurement are allowed
Numbering, guide rail slide block 6 drive ball float 14 according to setting points start measurement, since starting point, ball float 14 is often moved
2mm, the resistance of the test urea liquid level sensor product of universal meter 10 is simultaneously recorded, and 205 points are tested altogether, after the completion of test, will
Data are preserved to Microsoft Excel and are made as chart format, and theoretical value and actual value are compared；By diagram curve, can
Intuitively to see whether ball float 14 has hop in moving process, whether output is in a certain section of exception, under normal circumstances, test
The curve that point is constituted overlaps with theoretical curve, if can not overlap, illustrates that output of products has abnormal conditions；By chart point
Analysis, can also judge position, the failure mode of abnormity point, be manufacture, product is repaired etc. provides significant data, it is except can
For finished product detection, the detection of circuit board module in production process is can be also used for, the element on timely discovery circuit plate is
It is no working properly.
Urea liquid level sensor test system described in the utility model is functional, test data accurate, testing efficiency
Significantly improve；For the test of finished product, by this specific embodiment, 205 points are detected, the time of test is 3 points of each product
Clock, if reducing number of test points, can be shorter with the time；For the product of requirements at the higher level, more points can be set, realized more
High-precision measurement；For in production process semi-finished product test, hop detection only need to 1 minute one；It is relative to artificial
Manual ball float measurement, increases substantially efficiency, and the data of test are saved in control terminal, can at any time review, check；Test number
According to client, improve product quality and CSAT directly can be supplied to product as product inspection report.
The above, is only used to illustrate the technical solution of the utility model and unrestricted, those of ordinary skill in the art couple
Other modifications or equivalent that the technical solution of the utility model is made, without departing from technical solutions of the utility model
Spirit and scope, all should cover in the middle of right of the present utility model.
Claims (4)
1. urea liquid level sensor test system, it is characterised in that it includes marble platform, grating scale, line slideway, guide rail
Leading screw, guide rail slide block, stepper motor, product mounting bracket, urea liquid level sensor product, ball float, universal meter；Described grating
Chi is fitted in marble platform；Grating scale is provided with grating ruler reading head；Grating ruler reading head is connected with grating read module；Straight line
Guide rail is located in marble platform；Line slideway is located at the side of grating scale；Line slideway is provided with guide rail slide block；Guide rail slide block
Rotated with guide rail leading screw and be connected；The termination of guide rail leading screw is connected with stepper motor；Stepper motor is connected with motor control module；Light
Grid ruler reading head, ball float are separately fixed at the two ends of guide rail slide block；The side of line slideway is provided with product mounting bracket；Grating scale,
Line slideway, product mounting bracket are parallel to each other；Product mounting bracket is provided with urea liquid level sensor product；Urea level is passed
The sensor output of sensor product is connected with universal meter；Grating read module, motor control module, universal meter are respectively by number
It is connected with control terminal according to line；Control terminal is provided with software systems.
2. urea liquid level sensor test system according to claim 1, it is characterised in that described product mounting bracket
On slidably connect two brackets；Bracket is provided with tightening nut with the junction of product mounting bracket；Urea liquid level sensor
The two ends of product are separately fixed on two brackets.
3. urea liquid level sensor test system according to claim 1, it is characterised in that described universal meter is 6 half
Universal meter.
4. urea liquid level sensor test system according to claim 1, it is characterised in that described software systems are included
System, test control system, quick hop detecting system are read in ball float position control system, grating scale position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621339927.9U CN206269894U (en) | 2016-12-07 | 2016-12-07 | urea liquid level sensor test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621339927.9U CN206269894U (en) | 2016-12-07 | 2016-12-07 | urea liquid level sensor test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206269894U true CN206269894U (en) | 2017-06-20 |
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ID=59043597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621339927.9U Active CN206269894U (en) | 2016-12-07 | 2016-12-07 | urea liquid level sensor test system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206269894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595817A (en) * | 2016-12-07 | 2017-04-26 | 深圳华夏恒泰电子有限公司 | Urea liquid level sensor test system |
-
2016
- 2016-12-07 CN CN201621339927.9U patent/CN206269894U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595817A (en) * | 2016-12-07 | 2017-04-26 | 深圳华夏恒泰电子有限公司 | Urea liquid level sensor test system |
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