CN1667361A - Non-contact electronic horizon sensor - Google Patents
Non-contact electronic horizon sensor Download PDFInfo
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- CN1667361A CN1667361A CN 200510008573 CN200510008573A CN1667361A CN 1667361 A CN1667361 A CN 1667361A CN 200510008573 CN200510008573 CN 200510008573 CN 200510008573 A CN200510008573 A CN 200510008573A CN 1667361 A CN1667361 A CN 1667361A
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Abstract
The invention discloses a non-contact electronic horizon sensor with light source, level vial, photosensitive part and image processing unit. Thereinto, the level vial has a bubble in it and is laid where it can receive light coming from light source; the photosensitive part is located at the position corresponding to the bubble in the level vial and also having a fixed distance from the level vial, in order to catch the bubble's image when light source shines on the level vial; the image processing unit is electrically connected with the phothsensitive part and converts the bubble's image into electronic level signals by comparing its mass center with a preset point.
Description
Technical field
The present invention relates to a kind of horizon sensor, particularly a kind of non-contact electronic horizon sensor.
Background technology
Horizontal bubble is checked level whether and is predicted the measurement mechanism of determinand vergence direction and angle.Some horizontal bubble is columniform glass tube, and some then is designed to spherical shape, and so bubble just can be to moving, so just do not need level meter is done repeatedly the rotations of 90 degree when the adjustment level all around.
Fig. 1 is the synoptic diagram of traditional horizon sensor.Please refer to Fig. 1, traditional horizon sensor 100 mainly is made of with a plurality of metal electrodes 106 housing 102, an electrolytic solution 104.Wherein, electrolytic solution 104 is installed in the housing 102, and metal electrode 106 passes housing 102 and be soaked in the electrolytic solution 104, and housing 102 inside comprise a bubble 108, and float on the top of electrolytic solution 104.Surperficial when mobile along housing 102 because horizon sensor 100 tilts when bubble 108, the impedance meeting between the metal electrode 106 changes because of bubble 110 displacements, thus can utilize the change of this resistance, and try to achieve the horizontal level of horizon sensor 100.
Yet traditional horizon sensor 100 still has not convenient property in operation, and its reason is as follows:
1, the metal electrode 106 of traditional horizon sensor 100 is after using over a long time, and its surperficial corrosion-vulnerable and influence impedance causes horizon sensor 100 precision and sensitivity to reduce.
2, the electrolytic solution 104 of traditional horizon sensor 100 must regularly be changed, to keep its ion concentration.
Even 3, traditional horizon sensor 100 periodic replacement metal electrode 106 and electrolytic solution 104, because of it is gradual consumption, so the variation of impedance is more or less also influenced, related precision and the sensitivity that influences horizon sensor 100.
4, electrolytic solution 104 is easily influenced by ambient temperature, and changes the electrical conductivity of electrolytic solution 104, related precision and the sensitivity that influences horizon sensor 100.
Summary of the invention
The purpose of this invention is to provide a kind of non-contact electronic horizon sensor, can access the horizontal electronic signal of a precision, and then promote precision, the sensitivity of sensor and detect degree of stability.
Another object of the present invention provides a kind of non-contact electronic horizon sensor, avoids using having corrosive electrolytic solution, and is medium with light, can effectively prolong sensor life-time.
For reaching above-mentioned purpose, the present invention proposes a kind of non-contact electronic horizon sensor, and it has light source, horizontal bubble (Vial), photosensory assembly and image process unit.Wherein, horizontal bubble contains a bubble (bubble), and is positioned over the position that can accept from the irradiate light of light source.Photosensory assembly is arranged in the bubble of corresponding horizontal bubble and with photosensory assembly the position of one fixed range is arranged, so that acquisition is subjected to the bubble image of the horizontal bubble after the light source irradiation.Image process unit is electrically connected photosensory assembly, and compares by a mass centre and the preset with the bubble image, and the bubble video conversion is become an electronic horizon signal.
The present invention also provides a kind of method that measures level, it comprises: use a light source irradiation contain the horizontal bubble of a bubble, after this horizontal bubble is by this light source irradiation, capture this bubble image, compare with a preset and this bubble video conversion become an electronic horizon signal by mass centre, and the degree of tilt of adjusting this bubble according to the electronic horizon signal this bubble image.
Below in conjunction with accompanying drawing the utility model is described.
Description of drawings
Fig. 1 is the synoptic diagram of traditional horizon sensor;
Fig. 2 A is the horizontal bubble inclination synoptic diagram according to the non-contact electronic horizon sensor of one embodiment of the invention;
Fig. 2 B is the non-contact electronic horizon sensor of Fig. 2 A, the synoptic diagram after its bubble image that is positioned at obliquity is handled via image process unit;
Fig. 3 shows the process flow diagram that the bubble video conversion is become an electronic horizon signal process;
Fig. 4 A is the resonable synoptic diagram of thinking horizontality of horizontal bubble of the non-contact electronic horizon sensor of Fig. 2 A;
Fig. 4 B is the non-contact electronic horizon sensor of Fig. 4 A, the synoptic diagram after its bubble image that is positioned at the desirable level position is handled via image process unit;
Fig. 5 is the synoptic diagram that connects a circuit arrangement according to the non-contact electronic horizon sensor of Fig. 2 A of one embodiment of the invention and four A;
Fig. 6 is a non-contact electronic horizon sensor according to another embodiment of the present invention;
Fig. 7 is that display application non-contact electronic horizon sensor of the present invention is installed on the constitutional diagram on the supporting mechanism, wherein is the non-contact electronic horizon sensor that uses two square presentation graphs 2A;
Fig. 8 is the exploded view for the supporting mechanism of Fig. 7;
Fig. 9 is the detail drawing of the circuit arrangement of Fig. 8; And
Figure 10 is the synoptic diagram that connects a determinand according to the non-contact electronic horizon sensor of Fig. 2 A of a preferred embodiment of the present invention and four A.
Description of reference numerals: 100 known level sensors; 102 housings; 104 electrolytic solution; 106 metal electrodes; 108 bubbles; 200 non-contact electronic horizon sensors; 202 level meters; 204 photosensory assemblies; 206 image process units; 208 light sources; 210 transparent tube; 212 liquid; 214 bubbles; 216 bubble center positions; 218 transparent tube centers; 220 bubble images; 302 circuit arrangements; 304 electronic horizon signals; 306 platforms; 308 horizontal bubble holders; 310 determinands.
The tool present embodiment
Please refer to Fig. 2 A and Fig. 2 B, non-contact electronic horizon sensor 200 has a horizontal bubble 202, a photosensory assembly 204 and an image process unit 206 according to an embodiment of the invention.Horizontal bubble can use the transparent outer cover as transparent ball or transparent tube 210, device has a first fluid and one second fluid in it, the density of first fluid is different from the density of second fluid, the bubble (bubble) that second fluid can be formed float on the first fluid, and when horizontal bubble tilted, bubble can move along with the inclination of horizontal bubble.In the preferred embodiment shown in Fig. 2 A, first fluid is a liquid 212, and second fluid is a gas, and therefore, the bubble among Fig. 2 A is a bubble 214.After this, for the purpose of simplifying the description, will claim that first fluid is a liquid 212, and claim that bubble is a bubble 214.Bubble 214 can be accepted the irradiation of a light source 208, and light source 208 can be cold light panel (Electroluminescent Board, abbreviation EL), light emitting diode (Light Emitting Diode is called for short LED), bulb, daylight lamp, cathode-ray tube (CRT) or its similar device.Photosensory assembly 204 is positioned at corresponding horizontal bubble 202 and with horizontal bubble 202 position of certain distance Z is arranged, and this photosensory assembly 204 for example is charge-coupled image sensor (Charge-coupled device), complementary metal oxide semiconductor (CMOS) (CMOS) or its similar device.In addition, the pattern of photosensory assembly 204 for example is the linear photosensory assembly (linear photo sensor) that can capture the one dimension image of bubble 214, or can capture the domain type photosensory assembly of the bidimensional image of bubble 214.Image process unit 206 is electrically connected photosensory assembly 204, and can be as personal computer, microcontroller, digital circuit, Application Specific Integrated Circuit or its similar device.
Liquid 212 is disposed in the transparent tube 210, and bubble 214 floats above liquid 212, and transparent tube 210 is normally made by glass or plastics.When horizontal bubble 202 tilts, bubble 214 promptly can move toward the eminence of transparent tube 210, on the other hand, when horizontal bubble 202 is in desirable horizontality, the mass centre of bubble 214 will be positioned on the ad-hoc location of center line of transparent tube 210, and this ad-hoc location promptly can be used as the position, preset whether decision tilts.When transparent tube 210 is subjected to light source 208 irradiations, photosensory assembly 204 is that fechtable is subjected to light source 208 postradiation bubble images 220, image process unit 206 can compare by mass centre and the preset with bubble 214 images, with the mass centre that obtains bubble image 220 and preset (that is, the ad-hoc location of the central authorities of transparent tube 210) the relative displacement W between, and the image 220 of bubble 214 is converted to an electronic horizon signal, whether be positioned at horizontality to judge horizontal bubble.
Please refer to the flow process that the bubble video conversion is become an electronic horizon signal shown in Figure 3, as shown in Figure 3, its flow path switch is from step 206a.In step 206a, the image of photosensory assembly 204 acquisition bubbles 214 then advances to step 206b.In step 206b, filter institute's picked image to confirm the actual range of bubble 214, enter step 206c afterwards.In step 206c, image process unit 206 then enters step 206d by being made comparisons to obtain the relative displacement W of bubble 214 in the center and a preset of the image 220 of bubble 214; Wherein, the center of the image 220 of bubble 214 (that is, the mass centre of bubble 214) can use following formula to calculate:
Wherein, x, y coordinate are respectively the level and the upright position of any pixel on institute's pick-up image, and the x coordinate is the transverse axis along a picture, the specified pixel number of starting at from the leftmost pixel of image (pixel 0); The y coordinate then is the Z-axis along a picture, from the specified pixel number that the uppermost pixel of image (pixel 0) is started at, makes x and y coordinate can orient any specific pixel location on the image;
M is the total pixel number amount along the transverse axis of bubble image 220;
N is the total pixel number amount along the Z-axis of bubble image 220;
B[i, j] be that (i, weight j) when pixel is black, are designated as 1 to pixel, and when pixel is white, are designated as 0;
A is total amount of pixels of bubble image 220.
In step 206d, image process unit 206 sends an electronic horizon signal according to displacement W.
Synoptic diagram when Fig. 4 A and Fig. 4 B are positioned at the desirable level state for the non-contact electronic horizon sensor 200 of Fig. 2 A and Fig. 2 B.After bubble image 220 was handled by image process unit 206, the relative displacement between the center of bubble image 220 and preset (that is, the ad-hoc location at the center of transparent tube 210) was zero.
Fig. 5 is the embodiment of non-contact electronic horizon sensor 200 connecting circuit devices 302.Circuit arrangement 302 can be the motor with control circuit, and image process unit 206 then is used for exporting an electronic horizon signal 304 to this circuit arrangement 302, with the feedback signal as horizontal bubble 202 degree of tilt of control circuit device 302 operation adjustment.That is to say, after bubble 214 was subjected to light source 208 irradiations, photosensory assembly 204 can capture bubble image 220, and after image process unit 206 is handled bubble images 220, export an electronic horizon signal 304, this electronic horizon signal 304 is as the feedback signal of the outside circuit arrangement 302 that connects.
Please continue with reference to Fig. 5, horizontal bubble 202 is positioned on the base 308, and base 308 then places on the platform 306.After circuit arrangement 302 receives electronic horizon signal 304, can actuate the degree of tilt of the motor of circuit arrangement 302, and then adjust the degree of tilt of bubble 214 with adjustment platform 306, make horizontal bubble 202 be positioned horizontal level.
Please refer to non-contact electronic horizon sensor according to another embodiment of the present invention shown in Figure 6.The non-contact electronic horizon sensor of Fig. 6 is made up of the assembly of the non-contact electronic horizon sensor that is similar to Fig. 5, and uses identical element numbers, and its same section will be explained no longer in detail.Both difference is in the fixed range of further 202 in photosensory assembly 204 and horizontal bubble, so that the photosensory assembly 204 of Fig. 6 directly is placed on the surface corresponding to the horizontal bubble 202 of bubble 214 positions, at this moment, the width L of the photosensory assembly 204 of Fig. 6, at least should be the twice of bubble 214 diameters, with the complete image of the bubble 214 that captures different degree of tilt.
Please refer to Fig. 7 and non-contact electronic horizon sensor according to an embodiment of the invention 200 shown in Figure 8 and be installed on the application combination figure on the supporting mechanism and the exploded view of supporting mechanism thereof, wherein use two squares 301 to come the non-contact electronic horizon sensor 200 of representative graph 2A.As shown in Figure 7, non-contact electronic horizon sensor 200 of the present invention is installed on the base 308,308 of bases are coupled to a frame 305, frame 305 has the universal bearing unit 3051 in abutting connection with base 308, when 3051 control circuits 3021 in circuit arrangement 302 in universal bearing unit receive the electronic horizon signal 308 of image process unit 206, drive by circuit arrangement 302.Therefore, use a string continuous electronic horizon signal 304 at the non-contact electronic horizon sensor 200 that is installed on the supporting mechanism shown in Fig. 7, be used as the back coupling control signal of circuit arrangement 302, to drive universal bearing unit 3051 base 308 is tilted, and then adjust the levelness of the bubble 214 in the horizontal bubble 202.
Please refer to Fig. 8 and Fig. 9, non-contact electronic horizon sensor 200 is installed on the supporting mechanism that comprises base 308, frame 305 and circuit arrangement 302.Wherein, device has two squares 301 of representing horizon sensor 200 on the base 308, and frame 305 has a universal bearing unit 3051 that articulates base 308, connecting a plurality of driving stems 3052 on it, each driving stem 3052 is coupled to the drive block 3022c corresponding to the motor unit 3022 of the circuit arrangement 302 of driving stem 3052.Therefore, when the control circuit 3021 of circuit arrangement 302 receives electronic horizon signal 304 from the image process unit 206 of non-contact electronic horizon sensor 200, the motor 3022a of circuit arrangement 302 also drives the power wheel 3022d of coupling motor 3022a, be coupled to another power wheel 3022e of screw rod 3022b with drive, make the drive block 3022c that is installed on the screw rod 3022b to move along screw rod 3022b, and then the driving stem 3052 of drive and its coupling, adjust the levelness of base 308 to utilize universal bearing unit 3051.
Figure 10 is the synoptic diagram that contactless electronic horizon sensor 200 connects a determinand.In Figure 10, non-contact electronic horizon sensor 200 is positioned on the determinand 310, and detecting the levelness of determinand 310, and determinand 310 for example is inclinometer, measurement mechanism, or metering equipment or the like needs the place of high level of accuracy.
In various embodiments of the present invention, usability optical assembly 204 captures the image of bubble 214, and uses image process unit 206 to handle bubble image 220, to export a high-precision electronic horizon signal 304.Yet, above-mentioned only for illustrating, be not in order to limiting the kind of bubble image 220 acquisition modes of the present invention and image process unit 206, any those skilled in the art can know photosensory assembly 204 of the present invention by inference, image process unit 206 can also be other kenel.
Comprehensive the above, non-contact electronic horizon sensor 200 of the present invention has following advantage at least:
1, non-contact electronic horizon sensor 200 of the present invention, usability optical assembly 204 acquisition bubble images 220, no matter bubble 214 is in static or flow state, all can correctly respond to the position of bubble 214, and then by the electronic horizon signal 304 of image process unit 206 output one precision, as the foundation of determined level degree.
2, non-contact electronic horizon sensor 200 of the present invention, use image process unit 206 to handle bubble image 220, but and the displacement of correct calculation bubble center position 216 and transparent tube center 218, be convenient to the situation that determined level bubble 202 or determinand 310 tilt.
3, the bubble image 220 of non-contact electronic horizon sensor 200 of the present invention is after image process unit 206 is handled, can export the electronic horizon signal 304 of a precision, with feedback signal, and then adjust the levelness of horizontal bubble 202 as external circuits device 302.
4, non-contact electronic horizon sensor 200 of the present invention is because use untouchable method for measurement, so can not change measurement accuracy because of variation of ambient temperature.
The above only is preferred embodiment of the present invention, can not limit the scope of the invention with this.Therefore all equalizations of doing according to claim of the present invention change and modify, will not lose main idea of the present invention place, also do not break away from the spirit and scope of the present invention, all should be considered as further enforcement of the present invention.
Claims (15)
1, a kind of non-contact electronic horizon sensor comprises:
One light source;
One horizontal bubble contains a bubble, and is positioned over the position that can accept from the irradiate light of this light source;
One photosensory assembly, be arranged in to should horizontal gas this bubble of bubble, and the position of one fixed range is arranged, so that capture the image that this horizontal bubble is subjected to this bubble after this light source irradiation with this horizontal bubble; And
One image process unit is electrically connected this photosensory assembly, and compares with a preset by the mass centre with the image of this bubble and the video conversion of this bubble is become an electronic horizon signal.
2, non-contact electronic horizon sensor as claimed in claim 1, wherein this horizontal bubble has a transparent shell, a gas and a liquid, this liquid is disposed in this transparent shell, and this gas-floating in the top of this liquid to form this bubble, make that bubble can move when horizontal bubble tilted.
3, non-contact electronic horizon sensor as claimed in claim 2, wherein this preset is the center of this transparent shell.
4, non-contact electronic horizon sensor as claimed in claim 1, wherein this image process unit is before comparing the mass centre of this bubble and this preset, filter the image of this bubble earlier to confirm the scope of this bubble, and calculate the mass centre of this bubble with reference to the scope of confirming, send this electronic horizon signal according to the displacement of this bubble that relatively obtains again.
5, non-contact electronic horizon sensor as claimed in claim 1, wherein this light source is selected from the group that comprises cold light panel, light emitting diode, bulb, daylight lamp and cathode-ray tube (CRT).
6, non-contact electronic horizon sensor as claimed in claim 1, wherein this photosensory assembly is installed on position that should bubble, and contacts with the surface of this horizontal bubble.
7, non-contact electronic horizon sensor as claimed in claim 6, wherein the width of this photosensory assembly is at least the twice of bubble diameter.
8, non-contact electronic horizon sensor as claimed in claim 1, wherein this photosensory assembly is selected from the group that comprises Charged Coupled Device and complementary metal oxide semiconductor (CMOS).
9, non-contact electronic horizon sensor as claimed in claim 1, wherein this image process unit is selected from the group that comprises personal computer, microcontroller, digital circuit and Application Specific Integrated Circuit.
10, non-contact electronic horizon sensor as claimed in claim 1 also comprises:
One base is in order to install horizontal bubble, light source and photosensory assembly;
One frame articulates and is coupled to base, and has a driving stem, and
One circuit arrangement in order to receiving the electronic horizon signal driving this driving stem, and then correspondingly tilts to adjust the degree of tilt of this base this base.
11, a kind of method that measures level comprises the following steps:
Use a light source to go to shine to contain a horizontal bubble of bubble;
Capture the image that this horizontal bubble is subjected to this bubble after this light source irradiation; And
Compare with a preset by mass centre and the video conversion of this bubble is become an electronic horizon signal the image of bubble.
12, method as claimed in claim 11, wherein switch process comprises the following steps:
The image that filters bubble is to confirm the scope of bubble;
Calculate the mass centre of bubble;
The mass centre and the preset of bubble are compared to determine the displacement of bubble; And
Send an electronic horizon signal according to this displacement.
13, method as claimed in claim 11 also comprises:
Adjust the degree of tilt of horizontal bubble according to this electronic horizon signal.
14, method as claimed in claim 11 also comprises:
Use the electronic horizon signal with feedback signal as the circuit arrangement of adjusting this bubble degree of tilt.
15, a kind of non-contact electronic horizon sensor comprises:
One horizontal bubble contains a bubble;
One photosensory assembly, be arranged in to should horizontal gas bubble this bubble and with this horizontal bubble the position of one fixed range is arranged so that capture the image of this bubble; And
One image process unit is electrically connected photosensory assembly, and compares with a preset and the bubble video conversion is become an electronic horizon signal by the mass centre with the bubble image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510008573 CN1667361A (en) | 2004-03-08 | 2005-02-22 | Non-contact electronic horizon sensor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420006905 | 2004-03-08 | ||
| CN200420006905.1 | 2004-03-08 | ||
| CN 200510008573 CN1667361A (en) | 2004-03-08 | 2005-02-22 | Non-contact electronic horizon sensor |
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| Publication Number | Publication Date |
|---|---|
| CN1667361A true CN1667361A (en) | 2005-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510008573 Pending CN1667361A (en) | 2004-03-08 | 2005-02-22 | Non-contact electronic horizon sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100555178C (en) * | 2005-09-30 | 2009-10-28 | 鸿富锦精密工业（深圳）有限公司 | The portable electron device of attitude sensing module and tool attitude sensing function |
| WO2009152650A1 (en) * | 2008-06-17 | 2009-12-23 | 西安华科光电有限公司 | A leveling accuracy monitoring and display system of a gravity gradienter |
-
2005
- 2005-02-22 CN CN 200510008573 patent/CN1667361A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100555178C (en) * | 2005-09-30 | 2009-10-28 | 鸿富锦精密工业（深圳）有限公司 | The portable electron device of attitude sensing module and tool attitude sensing function |
| WO2009152650A1 (en) * | 2008-06-17 | 2009-12-23 | 西安华科光电有限公司 | A leveling accuracy monitoring and display system of a gravity gradienter |
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