CN103196359A - Gap measurement method and gap measurement device - Google Patents
Gap measurement method and gap measurement device Download PDFInfo
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- CN103196359A CN103196359A CN 201310116286 CN201310116286A CN103196359A CN 103196359 A CN103196359 A CN 103196359A CN 201310116286 CN201310116286 CN 201310116286 CN 201310116286 A CN201310116286 A CN 201310116286A CN 103196359 A CN103196359 A CN 103196359A
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Abstract
The invention provides a gap measurement method and a gap measurement device. A piezoelectric film sensor is placed between a first component and a second component so as to ensure that electric conduction quantity is generated by the piezoelectric film sensor because of squeezing of the first component and the second component, and size of a gap between the first component and the second component is acquired according to the electricity conduction quantity, wherein gap measurement needs conducing on the first component and the second component. The method that the size of the gap between the first component and the second component is converted to the electricity conduction quantity of the piezoelectric film sensor, and is acquired through the electricity conduction quantity ensures that measurement of the size of the gap is not limited to visible places where light beams can project any more, and therefore measurement of hidden gaps is effectively solved.
Description
Technical field
The present invention relates to field of measuring technique, more particularly, relate to a kind of clearance measuring method and device.
Background technology
When two parts did not fully contact, the space that exists between these two parts was called the gap, and these two parts can be relatively-stationary, also can be relatively-movable.In some cases, the test to gap length is absolutely necessary.For example: when banknote passed through the gap of cash inspecting machine frame and magnetic head, the banknote magnetic signal when cash inspecting machine passes through its magnetic head by detecting banknote came the true and false of banknote is identified.When banknote passes through cash inspecting machine, require banknote to touch magnetic head, cash inspecting machine could obtain correct banknote magnetic signal straightly.If the excesssive gap that cash inspecting machine passes through for banknote or too small all can have influence on magnetic head to the collection of the banknote magnetic signal by banknote, thereby have influence on the identification to authenticity of banknotes.
The method of existing measurement clearance, mainly contain two kinds: a kind of is to utilize traditional survey instrument to measure, as vernier caliper, during measurement clearance, vernier caliper directly is stuck in two enterprising cracks in the ranks of object and measures, this kind measuring method, the gap in the place that can only can directly snap into vernier caliper is measured, and namely measured gap must be in visible artificial exercisable place.Another kind is to utilize the measuring method of light projection to measure, and is example with the camera, takes pictures by camera, can convert the object of band gap to electronic image, grasps the border, gap by software then, directly measures the distance on two borders.This kind measuring method needs measured gap to be in the place that light can project.
Therefore, above-mentioned two kinds of measuring methods all can't namely be in place invisible, that light can not project to hidden gap and measure.
Summary of the invention
In view of this, the invention provides a kind of clearance measuring method and device, to realize the measurement to hidden gap.
A kind of clearance measuring method is used for the gap between relatively-movable first parts and second parts is measured; Using in the described method has piezoelectric film sensor, and described method comprises:
Described first parts are moved from its initial position, make it away from described second parts;
Described piezoelectric film sensor is placed between described first parts and described second parts, and mobile described first parts are squeezed described piezoelectric film sensor to described initial position;
Obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
Preferably, described step is obtained the electric conduction quantity that described piezoelectric film sensor produces because of extruding, and the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap, is specially:
Use the processor that is connected with described piezoelectric film sensor, obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
Preferably, also comprise:
The size in described gap is presented on the display screen that is connected with described processor.
A kind of measurement mechanism of gap is used for the gap between relatively-movable first parts and second parts is measured; Described device comprises:
Mobile unit is used for described first parts are moved from its initial position, makes it away from described second parts;
Squeeze unit is used for described piezoelectric film sensor is placed between described first parts and described second parts, and mobile described first parts are squeezed described piezoelectric film sensor to described initial position;
Acquiring unit is used for obtaining the electric conduction quantity that described piezoelectric film sensor produces because of extruding, and the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
Preferably, described acquiring unit specifically is set to:
Use the processor that is connected with described piezoelectric film sensor, obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
Preferably, also comprise: display unit is used for the size in described gap is presented at the display screen that is connected with described processor.
From above-mentioned technical scheme as can be seen, the invention provides a kind of clearance measuring method and device, by piezoelectric film sensor being placed between first parts and second parts that need carry out clearance measurement, make piezoelectric film sensor because the extruding of first parts and second parts produces electric conduction quantity, obtain the size in gap between first parts and second parts according to this electric conduction quantity.The present invention is by adopting the electric conduction quantity that the size of first parts and second parts clearance is converted into piezoelectric film sensor, obtained the method for the size of first parts and second parts clearance by this electric conduction quantity, make to the place that as seen measurement no longer is confined to, light can project of gap length, efficiently solve the measurement to hidden gap.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of clearance measuring method that Fig. 1 provides for the embodiment of the invention;
The structural representation of a kind of piezoelectric film sensor measuring system that Fig. 2 provides for the embodiment of the invention;
The another kind of clearance measuring method that Fig. 3 provides for the embodiment of the invention;
The front elevation of a kind of device that need measure the gap that Fig. 4 provides for the embodiment of the invention;
The side view of a kind of device that need measure the gap that Fig. 5 provides for the embodiment of the invention;
Side view after a kind of need the opening the device that the gap is measured that Fig. 6 provides for the embodiment of the invention;
A kind of clearance measurement adjusting synoptic diagram that need carry out the device of measuring and adjusting to the gap that Fig. 7 provides for the embodiment of the invention;
The another kind that Fig. 8 provides for the embodiment of the invention need carry out the clearance measurement adjusting synoptic diagram of the device of measuring and adjusting to the gap;
The structural representation of the measurement mechanism in a kind of gap that Fig. 9 provides for the embodiment of the invention;
The structural representation of the measurement mechanism in the another kind of gap that Figure 10 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As shown in Figure 1, a kind of clearance measuring method that the embodiment of the invention provides is used for the gap between relatively-movable first parts and second parts is measured; Using in the described method has piezoelectric film sensor, and described method comprises:
S11, described first parts are moved from its initial position, make it away from described second parts;
Be understandable that first parts can be that first parts move certain angle with respect to second parts with respect to the movement of second parts, or first parts are with respect to the moving certain distance of second part displacements.Wherein, can also be that second parts are moved from its initial position, make it away from first parts, or, mobile first parts and second parts simultaneously, make its mutually away from.
S12, described piezoelectric film sensor is placed between described first parts and described second parts, mobile described first parts are squeezed described piezoelectric film sensor to described initial position;
Wherein, piezoelectric film sensor is to utilize the stressed back of piezoelectric membrane to produce the sensor that piezoelectric effect is made, when piezoelectric membrane is subjected to the external force effect of a certain direction and deformation takes place when (comprising bending and telescopic shape change), because the polarization phenomena of internal charge, can produce an electric conduction quantity (electric charge or voltage) between the piezoelectric membrane upper/lower electrode surface, and this electric conduction quantity is proportional with the deformation (comprising bending and telescopic shape change) that takes place.
Be understandable that can be placed between described first parts and described second parts for making described piezoelectric film sensor, the thickness of described piezoelectric film sensor should be littler than the maximal value in gap between described first parts and described second parts; Equally, for making described piezoelectric film sensor can be subjected to the extruding of described first parts and described second parts, so that the size to its gap is measured, the thickness of described piezoelectric film sensor should be greater than the minimum value in gap between described first parts and described second parts.
S13, obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, obtain the size in gap between described first parts and described second parts according to described electric conduction quantity, finish the measurement to this gap.
Wherein, piezoelectric film sensor is before measuring the gap between first parts and second parts, this piezoelectric film sensor also needs with standard clearance verification standard value, namely under standard clearance, the electric conduction quantity of this piezoelectric film sensor correspondence, so that according to the electric conduction quantity of piezoelectric film sensor, obtain the size in gap between first parts and second parts.
A kind of clearance measuring method provided by the invention, by piezoelectric film sensor being placed between first parts and second parts that need carry out clearance measurement, make piezoelectric film sensor because the extruding of first parts and second parts produces electric conduction quantity, obtain the size in gap between first parts and second parts then according to this electric conduction quantity.The present invention is converted into the electric conduction quantity of piezoelectric film sensor by the size with first parts and second parts clearance, obtain the size in gap then by this electric conduction quantity, make to the place that as seen measurement no longer is confined to, light can project of gap length, efficiently solve the measurement to hidden gap.
In the gap measuring method provided by the invention, the piezoelectric film sensor of using is arranged in a kind of piezoelectric film sensor system, the structural representation of this piezoelectric film sensor measuring system as shown in Figure 2, described piezoelectric film sensor measuring system comprises: piezoelectric film sensor 21 and data processing equipment 22, and piezoelectric film sensor 21 is connected by lead 23 with data processing equipment 22;
Wherein, be provided with processor 24 and the display screen 25 that is connected in the data processing equipment 22.
Concrete, processor 24 can be monitored the electric conduction quantity of conductive film sensor 21, and electric conduction quantity is changed into the value of gap length, and the size in gap is presented on the display screen 25.
Therefore, step S13 is specially:
Use the processor 24 that is connected with piezoelectric film sensor 21, obtain the electric conduction quantity that described piezoelectric film sensor 21 produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
As shown in Figure 3, the another kind of clearance measuring method that the embodiment of the invention provides, step 13 also comprises:
S131, the size in described gap is presented on the display screen 25 that is connected with described processor 24.
Be understandable that, when first parts or second parts are provided with the adjusting parts of regulating its gap length, piezoelectric film sensor 21 is placed between first parts and second parts and after being squeezed, can be by regulating the size that this regulates the gap that shows on parts and the display screen 25, with the size adjustment in gap between first parts and second parts in standard value error allowed band.
After adjusting is finished, can move first parts, make it away from second parts, gap between first parts and second parts is enough to take out piezoelectric film sensor 21, after taking out piezoelectric film sensor 21, first parts are moved back into initial position after the gap adjustment, finish the adjusting to this gap.
Be the measuring process of clearer explanation to the gap, as shown in Figure 4 and Figure 5, front elevation and the side view of the embodiment of the invention provides a kind of device that need measure the gap,
Described device comprises: pinch roller support 110, pinch roller assembly 111, right regulating block 112, magnetic head 113 and left regulating block 114;
As shown in Figure 7, the embodiment of the invention provides a kind ofly need regulate synoptic diagram to the clearance measurement that the device of measuring and adjusting is carried out in the gap, the piezoelectric film sensor measuring system of using in the present embodiment as shown in Figure 2,
Before the measurement, piezoelectric film sensor 21 has been used standard clearance verification standard value.
Concrete, pinch roller support 110 is upwards opened certain angle along point of rotation S with respect to magnetic head 113, (can be placed on the magnetic head 113) in order to piezoelectric film sensor 21 is placed in the measurement clearance d, earlier piezoelectric film sensor 21 is positioned on the magnetic head 113 of pinch roller correspondence on pinch roller assembly 111 the right, then pinch roller support 110 is rotated back to initial position along point of rotation S, regulate right regulating block 112 so that measurement clearance d is regulated, in the error allowed band, fix right regulating block 112 up to the standard value that demonstrates on the display screen 25.
For the simplified measurement step, the piezoelectric film sensor system can adopt two or more piezoelectric film sensors.
As shown in Figure 8, the another kind that the embodiment of the invention provides need carry out the clearance measurement adjusting synoptic diagram of the device of measuring and adjusting to the gap, in the piezoelectric film sensor measuring system that present embodiment uses, except Duoing among Fig. 2 the piezoelectric film sensor 21 than having, other device and annexation are all identical.
Two piezoelectric film sensors 21 are identical, and before measuring, all used standard clearance verification standard value.
Concrete, pinch roller support 110 is upwards opened certain angle along point of rotation S with respect to magnetic head 113, (can be placed on the magnetic head 113) in order to two piezoelectric film sensors 21 are placed in the measurement clearance d, earlier one of them piezoelectric film sensor 21 is positioned on the magnetic head 113 of pinch roller correspondence on pinch roller assembly 111 the right, simultaneously, another piezoelectric film sensor 21 is positioned on the magnetic head 113 of pinch roller correspondence on pinch roller assembly 111 left sides, then pinch roller support 110 is rotated back to initial position along point of rotation S, regulate right regulating block 112 and left regulating block 114 then respectively, measure numerical value all in the error allowed band, fixing right regulating block 112 and left regulating block 114 up to demonstrating two on the display screen 25.Pinch roller support 110 is upwards opened certain angle along point of rotation S with respect to magnetic head 113, take out two piezoelectric film sensors 21, then pinch roller support 110 is rotated back to initial position along point of rotation S, finish the measuring and adjusting to measurement clearance d.
Embodiment is corresponding with said method, and the present invention also provides a kind of measurement mechanism of gap, and as shown in Figure 9, the measurement mechanism in a kind of gap that the embodiment of the invention provides is used for the gap between relatively-movable first parts and second parts is measured; Described device comprises:
Be understandable that first parts can be that first parts move certain angle with respect to second parts with respect to the movement of second parts, or first parts are with respect to the moving certain distance of second part displacements.Wherein, can also be that second parts are moved from its initial position, make it away from first parts, or, mobile first parts and second parts simultaneously, make its mutually away from.
Wherein, piezoelectric film sensor 21 is to utilize the stressed back of piezoelectric membrane to produce the sensor that piezoelectric effect is made, when piezoelectric membrane is subjected to the external force effect of a certain direction and deformation takes place when (comprising bending and telescopic shape change), because the polarization phenomena of internal charge, can produce an electric conduction quantity (electric charge or voltage) between the piezoelectric membrane upper/lower electrode surface, and this electric conduction quantity is proportional with the deformation (comprising bending and telescopic shape change) that takes place.
Be understandable that can be placed between described first parts and described second parts for making 21 piezoelectric film sensors, the thickness of piezoelectric film sensor 21 should be littler than the maximal value in gap between described first parts and described second parts; Equally, for making piezoelectric film sensor 21 can be subjected to the extruding of described first parts and described second parts, so that the size to its gap is measured, the thickness of piezoelectric film sensor 21 should be greater than the minimum value in gap between described first parts and described second parts.
Acquiring unit 92 is used for obtaining the electric conduction quantity that piezoelectric film sensor 21 produces because of extruding, and the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
Wherein, piezoelectric film sensor 21 is before measuring the gap between first parts and second parts, piezoelectric film sensor 21 also needs with standard clearance verification standard value, namely under standard clearance, the electric conduction quantity of piezoelectric film sensor 21 correspondences, so that according to the electric conduction quantity of piezoelectric film sensor 21, obtain the size in gap between first parts and second parts.
The measurement mechanism in a kind of gap provided by the invention, by piezoelectric film sensor 21 being placed between first parts and second parts that need carry out clearance measurement, make piezoelectric film sensor 21 because the extruding of first parts and second parts produces electric conduction quantity, obtain the size in gap between first parts and second parts then according to this electric conduction quantity.The present invention is converted into the electric conduction quantity of piezoelectric film sensor 21 by the size with first parts and second parts clearance, obtain the size in gap then by this electric conduction quantity, make to the place that as seen measurement no longer is confined to, light can project of gap length, efficiently solve the measurement to hidden gap.
Wherein, use in the gap measuring apparatus piezoelectric film sensor measuring system is arranged, the concrete same Fig. 2 of the structural representation of piezoelectric film sensor measuring system, because processor 24 can be monitored the electric conduction quantity of conductive film sensor 21, electric conduction quantity is changed into the value of gap length, and the size in gap is presented on the display screen 25, therefore, acquiring unit 92 specifically is set to:
Use the processor 24 that is connected with piezoelectric film sensor 21, obtain the electric conduction quantity that piezoelectric film sensor 21 produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
On the basis of the described embodiment of Fig. 9, as shown in figure 10, the measurement mechanism in the another kind of gap that the embodiment of the invention provides also comprises:
Be understandable that, when first parts or second parts are provided with the adjusting parts of regulating its gap length, piezoelectric film sensor 21 is placed between first parts and second parts and after being squeezed, can be by regulating the size that this regulates the gap that shows on parts and the display screen 25, with the size adjustment in gap between first parts and second parts in standard value error allowed band.
After adjusting is finished, can move first parts, make it away from second parts, gap between first parts and second parts is enough to take out piezoelectric film sensor 21, after taking out piezoelectric film sensor 21, first parts are moved back into initial position after the gap adjustment, finish the adjusting to this gap.
Wherein, the measurement mechanism in gap provided by the invention is to the concrete measuring process in gap, can same Fig. 4, Fig. 5, Fig. 6 and the described embodiment of Fig. 7, repeat no more herein.The measurement mechanism in gap provided by the invention, the piezoelectric film sensor system that adopts also can adopt two or more piezoelectric film sensors.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a clearance measuring method is characterized in that, is used for the gap between relatively-movable first parts and second parts is measured; Using in the described method has piezoelectric film sensor, and described method comprises:
Described first parts are moved from its initial position, make it away from described second parts;
Described piezoelectric film sensor is placed between described first parts and described second parts, and mobile described first parts are squeezed described piezoelectric film sensor to described initial position;
Obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
2. method according to claim 1, it is characterized in that described step is obtained the electric conduction quantity that described piezoelectric film sensor produces because of extruding, obtain the size in gap between described first parts and described second parts according to described electric conduction quantity, finish the measurement to this gap, be specially:
Use the processor that is connected with described piezoelectric film sensor, obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
3. method according to claim 2 is characterized in that, also comprises:
The size in described gap is presented on the display screen that is connected with described processor.
4. the measurement mechanism in a gap is characterized in that, is used for the gap between relatively-movable first parts and second parts is measured; Described device comprises:
Mobile unit is used for described first parts are moved from its initial position, makes it away from described second parts;
Squeeze unit is used for described piezoelectric film sensor is placed between described first parts and described second parts, and mobile described first parts are squeezed described piezoelectric film sensor to described initial position;
Acquiring unit is used for obtaining the electric conduction quantity that described piezoelectric film sensor produces because of extruding, and the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
5. device according to claim 4 is characterized in that, described acquiring unit specifically is set to:
Use the processor that is connected with described piezoelectric film sensor, obtain the electric conduction quantity that described piezoelectric film sensor produces because of extruding, the described electric conduction quantity of foundation obtains the size in gap between described first parts and described second parts, finishes the measurement to this gap.
6. device according to claim 5 is characterized in that, also comprises: display unit is used for the size in described gap is presented at the display screen that is connected with described processor.
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| CN201310116286.5A CN103196359B (en) | 2013-04-03 | 2013-04-03 | A kind of measuring method of gap and device |
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| CN201310116286.5A CN103196359B (en) | 2013-04-03 | 2013-04-03 | A kind of measuring method of gap and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2541953A (en) * | 2015-09-04 | 2017-03-08 | Perkins Engines Co Ltd | A gap measuring tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH688180A5 (en) * | 1991-02-01 | 1997-06-13 | Pechiney Rhenalu | Measuring device for roll gap control. |
| DE19819783C2 (en) * | 1998-05-04 | 2001-07-12 | Mannesmann Vdo Ag | Method and circuit for checking the width of the air gap in a speed sensor |
| CN2874424Y (en) * | 2006-01-25 | 2007-02-28 | 欧进萍 | PVDF piezoelectric film glue base package strain meter |
| CN201885680U (en) * | 2010-12-10 | 2011-06-29 | 上海交通大学 | Precise displacement sensing device |
| CN102889849A (en) * | 2012-09-18 | 2013-01-23 | 哈尔滨医科大学 | Micro pump distance automatic detection alarm of roller pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2541953A (en) * | 2015-09-04 | 2017-03-08 | Perkins Engines Co Ltd | A gap measuring tool |
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