CN103759712A - Digital level sensor - Google Patents

Digital level sensor Download PDF

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Publication number
CN103759712A
CN103759712A CN201410026868.9A CN201410026868A CN103759712A CN 103759712 A CN103759712 A CN 103759712A CN 201410026868 A CN201410026868 A CN 201410026868A CN 103759712 A CN103759712 A CN 103759712A
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push rod
pendulum
inditron
ccd
microprocessor
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CN103759712B (en
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孙晓明
吴明海
许建强
魏欣冰
刘克敬
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Shandong University
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Shandong University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/12—Measuring inclination, e.g. by clinometers, by levels by using a single pendulum plumb lines G01C15/10

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  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The invention discloses a digital level sensor, which comprises a shell, wherein a circuit system, a suspension swinging component, a hydraulic micro displacement amplifying component and parallel light sources are arranged in the shell; the suspension swinging component comprises a swinging hammer, a T-shaped push rod and a swinging hammer revolving shaft; the swinging hammer is movably connected with the swinging hammer revolving shaft through the T-shaped push rod. The sensor is characterized in that digital signals are output, each sensing element outputs signals in the forms of switch pulses, and sampled data are only '0' and '1', so that the defect of fuzzy components in the conventional analog quantity detection way is overcome, the influences of various environment distribution parameters such as temperature, air pressure intensity, electric fields and magnetic fields are avoided, and the accuracy and reliability of detection are increased. Moreover, the digital level sensor is very high in resolution and accuracy, simple in structure and low in cost.

Description

A kind of digital horizontal sensor
Technical field
The present invention relates to a kind of digital horizontal sensor.
Background technology
At present, when engineering equipment horizontality is measured, with more be that (it is the skew to groove by bubble phase to bubble and scale, with eyes, judge whether level of measured object), its shortcoming is that sensitivity is limited, and can not produce electric signal, be not easy to automatically measure and automatically control, and in more existing horizon sensors, be mostly in the mode of analog quantity conversion, carry out physical quantity conversion (as electrolytic, condenser type etc.), its output is analog quantity, the variation of the sampled signal amount of only having does not have the variation (sudden change) of matter, be difficult to resist outside interference, inner drift, stability and reliability are difficult to meet request for utilization.And the sensor of digital sampling can obtain the improvement of essence aspect reliability, stability, so the research of digitizing physical quantity switching mechanism has become a main direction in sensor research field.
Summary of the invention
For above-mentioned prior art, the invention provides a kind of digital horizontal sensor, this sensor has following characteristics: output be digital signal, each induction unit is the formal output signal with switching pulse, sampled data only has " 0 " and " 1 ", overcome traditional analog quantity detection mode itself with fuzzy composition, avoided being subject to the impact of the multiple environment distribution parameters such as temperature, atmospheric pressure, electric field, magnetic field, the accuracy, the reliability that detect have been improved widely, and resolution and precision very high, simple in structure, cost is low.
The present invention is achieved by the following technical solutions:
A digital horizontal sensor, comprises shell, in shell, is provided with Circuits System, hangs pendulum parts, fluid pressure type micrometric displacement amplifier unit 4 and source of parallel light, wherein,
The structure of described Circuits System is: comprise microprocessor 31, CCD driving circuit 32, LED drive circuit 34, signal processing circuit 33 and line array CCD 26, wherein, microprocessor 31 is connected with the LED array 28 of source of parallel light by LED drive circuit 34; Microprocessor 31 is connected 26 by CCD driving circuit 32 with line array CCD; Microprocessor 31 is connected with signal processing circuit 33, and signal processing circuit 33 is connected with line array CCD 26;
The structure of described suspension pendulum parts is: comprise pendulum 7, T-shaped push rod 6, pendulum rotating shaft 5, pendulum 7 is flexibly connected with pendulum rotating shaft 5 by T-shaped push rod 6;
Described fluid pressure type micrometric displacement amplifier unit 4 has two, its structure is: the inditron 16 that comprises liquid storage pipe 18 and made by transparent material, wherein, liquid storage pipe 18 is fastened and is formed by upper shell 17 and lower house 20, in liquid storage pipe 18, be provided with diaphragm 19(preferred rubber diaphragm), diaphragm 19 belows are provided with circular push pedal 22, push pedal 22 bottoms are connected with push rod 24, correspondingly, lower house 20 is provided with pilot hole 23, push rod 24 is through pilot hole 23, push rod 24 ends and T-shaped push rod 6 close contacts (push rod 24 of a fluid pressure type micrometric displacement amplifier unit 4 and one end close contact of T-shaped push rod 6, the push rod 24 of another fluid pressure type micrometric displacement amplifier unit 4 and the other end close contact of T-shaped push rod 6), inditron 16 is positioned at liquid storage pipe 18 tops, and is communicated with liquid storage pipe 18 through upper shell 17, source of parallel light is arranged on inditron 16 sides, and correspondingly, inditron 16 opposite sides are provided with line array CCD 26, and the light that source of parallel light is sent is irradiated on line array CCD 26 through after inditron 16, during use, in liquid storage pipe, fill opaque liquid,
The structure of described source of parallel light is: comprise LED array 28, frosted glass 29 and cylinder lenses 25 that ecto-entad is arranged in order.The principle of work of source of parallel light is common practise, for: after LED is luminous, light is focused on and forms a focal line (focal line and cylinder lenses axially parallel) through cylinder lenses by frosted glass, obtains source of parallel light.Between line array CCD 26 and inditron 16, be also provided with the cylinder lenses 25 for focusing on.
Further, described shell consists of housing 8, the front shroud 11 that is positioned at the upper cover plate 1 on housing 8 tops and is positioned at housing 8 front portions, surrounds a relatively airtight space between housing 8, upper cover plate 1 and front shroud 11; Housing 8 bottoms are provided with two limited blocks 9, and pendulum 7 is between two limited blocks 9, and the effect of limited block is: restriction pendulum hunting range.
Further, between upper shell 17 and lower house 20, by screw 15, connect.
The principle of work of a kind of digital horizontal sensor of the present invention is: under Action of Gravity Field, pendulum 7 always tries hard to keep plummet direction, when shell tilts with measured object, pendulum 7 swings an angle (pitch angle Δ Q) by opposite shell, thereby drive T-shaped push rod 6 to rotate same angle, and promote the corresponding Wei Yi ⊿ L of push rod 24 generation 1, by Jian Ce ⊿ L 1just can obtain the pitch angle Δ Q(tan Δ Q=⊿ L of shell 1/ h, its principle is known mathematical general knowledge, does not repeat them here).⊿ L 1detection limit process is: when push rod 24 produces displacement, the diaphragm 19 in corresponding liquid storage pipe 18 also produces identical Wei Yi ⊿ L 1, and then make liquid length in inditron 16 produce corresponding variation, variable quantity Wei ⊿ L 2， Qie ⊿ L 2=(D/a) 2⊿ L 1.
The derivation of equation is as follows: because liquid is incompressible, have S d⊿ L 1=S a⊿ L 2
S wherein d=л (D/2) 2s a=л (a/2) 2
Therefore there is л (D/2) 2⊿ L 1=л (a/2) 2⊿ L 2
Arrange get ⊿ L 2=(D/a) 2⊿ L 1
Wherein, D is liquid storage pipe diameter, a be inditron diameter as shown in Figure 9.
By Ce Liang ⊿ L 2with regard to Ke get Dao ⊿ L 1， ⊿ L 2measuring process be, the light signal that source of parallel light is sent, in the part optical signals of not blocked by the liquid in transparent inditron 16 (liquid is opaque liquid), can pass in the past, the picture dot of line array CCD 26 can receive light signal, be output as digital signal " 1 " (after signal processing circuit is processed), and the part optical signals of being blocked by the liquid in transparent inditron 16 just passes not pass by, the picture dot of line array CCD 26 does not receive light signal, is output as digital signal " 0 ".Microprocessor 31 must arrive ⊿ L according to predetermined algorithm to digital signal processing 2(when measured object tilts, in two inditrons, liquid level occurs differentially, and the picture dot number of accepting light signal in two CCD do not equating, microprocessor comes Que to Ding ⊿ L by calculating its difference 2, its principle is proven technique in prior art, does not repeat them here), and then get is Dao ⊿ L 1, and according to tan Δ Q=⊿ L 1/ h obtains pitch angle Δ Q, finally by Δ Q, determines levelness.(note: ⊿ L 2=(N 2-N 1) d/2 wherein, N 1, N 2be respectively the picture dot number that is subject to illumination in two CCD, d is inter-pixel distance).
Fluid pressure type micrometric displacement amplifier unit has been that the effect of pre-transducer (is experienced Bei Ce Liang ⊿ L 1and be transformed to the L with Bei Ce Liang ⊿ by CCD 1the electric weight that has definite relation), also play simultaneously and propose high-resolution effect and (for example get (D/a) 2=100, be equivalent to the L Ba ⊿ 1amplify 100 times, wherein ， ⊿ L 2=(D/a) 2⊿ L 1, D is liquid storage pipe diameter, a is inditron diameter, as shown in Figure 9, and when the inter-pixel of getting CCD is when for 0.01mm, Ze Dui ⊿ L 1resolution from 0.01mm, become, 0.01mm/100=0.0001mm).
Adopt the effect of two (two) hydraulic pressure micrometric displacement amplifier units to be:
1) determine initial point (angle of inclination is zero point), when liquid level in two inditrons is identical, (picture dot of two CCD situation of accepting light signal is identical, be subject to the light picture dot number identical), definition pitch angle was zero (liquid level while only having run-off the straight in two inditrons just occurs differential, i.e. another reduction that raises).
2) judge vergence direction (liquid level in the inditron of the left side defines pitch angle for just while raising, otherwise for bearing).
3) reduce the impact of temperature, when the liquid length in inditron changes because of temperature variation, because of change direction identical (rising simultaneously or reduction) and big or small the same, therefore cancel out each other (the shadow noon that reduces temperature is very important concerning precision, sensitivity and the stability of raising instrument).
4) realize automatic zero set (AZS) (being just decided to be zero point as long as the liquid level in two inditrons is the same).
Liquid storage pipe in fluid pressure type micrometric displacement amplifier unit of the present invention is equivalent to the cylinder barrel in hydraulic cylinder, diaphragm is equivalent to the piston (diaphragm is made with elastomeric material) in hydraulic cylinder, adopting diaphragm to make piston not only seals reliably, also there will not be the stuck problem as stiff piston, thereby guaranteed the reliability of measuring.Fluid pressure type micrometric displacement amount amplifier unit can also play damping action, therefore special damping mechanism need not be set again.This member principle is succinct, simple and compact for structure, and does not have mechanical wear problem.(note: because rubber diaphragm is very thin, add up stroke very short, ⊿ L 1< 0.8mm, so there will not be the phenomenon of mutual extruding between circular push pedal, rubber diaphragm and liquid storage pipe)
Described microprocessor, signal processing circuit, LED driving circuit and CCD driving circuit, how its working method, principle of work (as sent signal, receive signal, how signal processed etc.) be proven technique in prior art, do not repeat them here.
The structure of described source of parallel light, principle of work are proven technique in prior art, do not repeat them here.
Digital horizontal sensor of the present invention, compares with traditional horizon sensor, has the following advantages:
1) output is digital signal, each induction unit (picture dot) is the formal output signal (each picture dot only has whether receive light signal two states) with switching pulse, sampled data only has " 0 " and " 1 ", overcome traditional analog quantity detection mode itself with fuzzy composition, avoided being subject to temperature, atmospheric pressure, electric field, the impact of the multiple environment distribution parameter such as magnetic field, improved widely the accuracy detecting, reliability, do not need special A/D change-over circuit, can avoid like this A/D device (limited because of A/D device precision on the impact of precision, virtually can reduce data precision), be conducive to reduce Measuring Time, also be beneficial to the long-distance transmissions of signal.
2) resolution is very high, because fluid pressure type micrometric displacement amplifier unit is easy to realize very large enlargement factor (as long as change the value of D and a, and D becomes quadratic relationship with a), add that the inter-pixel of CCD is apart from very little (being generally 0.01mm left and right), so be easy to obtain high resolving power.For example get (D/a) 2=100, inter-pixel distance is 0.01mm, Ze Dui ⊿ L 1resolution be 0.0001mm(0.01mm/100=0.0001mm), when getting h=50mm, scale division value is 0.002mm/m(0.0001mm*20/50mm*20=0.002mm/m), resolution is about 0.4 rad.
3) fluid pressure type micrometric displacement amplifier unit is to displacement (⊿ L 1) amplification can not arrive the impact that is subject to electromagnetic field, therefore the antijamming capability of sensor is further enhanced (so transducer sensitivity can do very high).
4) CCD is discrete type element, does not therefore have nonlinear problem, and within whole range, the linearity is consistent.
5) can reduce widely the impact of temperature, because when the liquid length in inditron changes because of temperature variation, due to change direction identical (rising simultaneously or reduction) and big or small the same, therefore can cancel out each other (the shadow noon that reduces temperature is very important concerning precision, sensitivity and the stability of raising instrument).
6) stable performance, can be used for a long time and not need calibration.
In addition, the present invention also has simple in structure, easy to manufacture, low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is the structural representation of digital horizontal sensor of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of the fluid pressure type micrometric displacement amplifier unit of digital horizontal sensor of the present invention.
Fig. 4 is A-A line cut-open view in Fig. 3.
Fig. 5 is the fixed seat structure schematic diagram of digital horizontal sensor of the present invention.
Fig. 6 is B-B line cut-open view in Fig. 5.
Fig. 7 is the circuit theory schematic diagram of digital horizontal sensor of the present invention.
Fig. 8 is the assembling schematic diagram of fluid pressure type micrometric displacement amplifier unit and holder.
Fig. 9 is the calculating schematic diagram of digital horizontal sensor of the present invention.
Wherein, 1, upper cover plate; 2, circuit board; 3, L-type bracket; 4, fluid pressure type micrometric displacement amplifier unit; 5, pendulum rotating shaft; 6, T-shaped push rod; 7, pendulum; 8, housing; 9, limited block; 10, lead-in wire; 11, front shroud; 12, holder; 13, holder bracket; 14, pendulum rotary shaft base; 15, screw; 16, inditron; 17, upper shell; 18, liquid storage pipe; 19, diaphragm; 20, lower house; 21, fixed screw holes; 22, circular push pedal; 23, pilot hole; 24, push rod; 25, cylinder lenses; 26, line array CCD; 27, LED array fixed head; 28, LED array; 29, frosted glass; 30, data line; 31, microprocessor; 32, CCD driving circuit; 33, signal processing circuit; 34, LED drive circuit.
Note: measurement range ± 1 °.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
A digital horizontal sensor, comprises shell, in shell, is provided with Circuits System, hangs pendulum parts, fluid pressure type micrometric displacement amplifier unit 4 and source of parallel light, and as shown in Fig. 1～Fig. 9, wherein,
The structure of described Circuits System is: comprise microprocessor 31, CCD driving circuit 32, LED drive circuit 34, signal processing circuit 33 and line array CCD 26, wherein, microprocessor 31 is connected with the LED array 28 of source of parallel light by LED drive circuit 34; Microprocessor 31 is connected 26 by CCD driving circuit 32 with line array CCD; Microprocessor 31 is connected with signal processing circuit 33, and signal processing circuit 33 is connected with line array CCD 26;
The structure of described suspension pendulum parts is: comprise pendulum 7, T-shaped push rod 6, pendulum rotating shaft 5, pendulum 7 is flexibly connected with pendulum rotating shaft 5 by T-shaped push rod 6;
Described fluid pressure type micrometric displacement amplifier unit 4 has two, its structure is: the inditron 16 that comprises liquid storage pipe 18 and made by transparent material, wherein, liquid storage pipe 18 is fastened and is formed by upper shell 17 and lower house 20, in liquid storage pipe 18, being provided with diaphragm 19(is rubber diaphragm), diaphragm 19 belows are provided with circular push pedal 22, push pedal 22 bottoms are connected with push rod 24, correspondingly, lower house 20 is provided with pilot hole 23, push rod 24 is through pilot hole 23, push rod 24 ends and T-shaped push rod 6 close contacts (push rod 24 of a fluid pressure type micrometric displacement amplifier unit 4 and one end close contact of T-shaped push rod 6, the push rod 24 of another fluid pressure type micrometric displacement amplifier unit 4 and the other end close contact of T-shaped push rod 6), inditron 16 is positioned at liquid storage pipe 18 tops, and is communicated with liquid storage pipe 18 through upper shell 17, source of parallel light is arranged on inditron 16 sides, and correspondingly, inditron 16 opposite sides are provided with line array CCD 26, and the light that source of parallel light is sent is irradiated on line array CCD 26 through after inditron 16, during use, in liquid storage pipe, fill opaque liquid,
The structure of described source of parallel light is: comprise LED array 28, frosted glass 29 and cylinder lenses 25 that ecto-entad is arranged in order.Between line array CCD 26 and inditron 16, be also provided with the cylinder lenses 25 for focusing on.
Described shell consists of housing 8, the front shroud 11 that is positioned at the upper cover plate 1 on housing 8 tops and is positioned at housing 8 front portions, surrounds a relatively airtight space between housing 8, upper cover plate 1 and front shroud 11; Housing 8 bottoms are provided with two limited blocks 9, and pendulum 7 is between two limited blocks 9, and the effect of limited block is: restriction pendulum hunting range.
Between described upper shell 17 and lower house 20, by screw 15, connect.
During concrete application, housing 8 inwalls are provided with circuit board 2 and L-type bracket 3, L-type bracket 3 is provided with pendulum rotary shaft base 14, Circuits System (comprising microprocessor 31, CCD driving circuit 32, LED drive circuit 34, signal processing circuit 33) is fixed on circuit board 2, and microprocessor 31 passes upper cover plate 1 by lead-in wire 10(lead-in wire 10; Lead-in wire 10 comprises power lead and data line 30) be connected with relevant data processing circuit to power supply, pendulum rotating shaft 5 is fixed in pendulum rotary shaft base 14, and fluid pressure type micrometric displacement amplifier unit 4 is fixed on L-type support plate 3; LED array 28 is fixed on LED array fixed head 27, and LED array fixed head 27 and line array CCD 26 are all fixed on holder 12, and holder 12 is fixed on L-type bracket 3 by holder bracket 13.
The principle of work of a kind of digital horizontal sensor of the present invention is: under Action of Gravity Field, pendulum 7 always tries hard to keep plummet direction, when shell tilts with measured object, pendulum 7 swings an angle (pitch angle Δ Q) by opposite shell, thereby drive T-shaped push rod 6 to rotate same angle, and promote the corresponding Wei Yi ⊿ L of push rod 24 generation 1, by Jian Ce ⊿ L 1just can obtain the pitch angle Δ Q(tan Δ Q=⊿ L of shell 1/ h, its principle is known mathematical general knowledge, does not repeat them here).⊿ L 1detection limit process is: when push rod 24 produces displacement, the diaphragm 19 in corresponding liquid storage pipe 18 also produces identical Wei Yi ⊿ L 1, and then make liquid length in inditron 16 produce corresponding variation, variable quantity Wei ⊿ L 2， Qie ⊿ L 2=(D/a) 2⊿ L 1.
The derivation of equation is as follows: because liquid is incompressible, have S d⊿ L 1=S a⊿ L 2
S wherein d=л (D/2) 2s a=л (a/2) 2
Therefore there is л (D/2) 2⊿ L 1=л (a/2) 2⊿ L 2
Arrange get ⊿ L 2=(D/a) 2⊿ L 1
Wherein, D is liquid storage pipe diameter, a be inditron diameter as shown in Figure 9.
By Ce Liang ⊿ L 2with regard to Ke get Dao ⊿ L 1， ⊿ L 2measuring process be, the light signal that source of parallel light is sent, in the part optical signals of not blocked by the liquid in transparent inditron 16 (liquid is opaque liquid), can pass in the past, the picture dot of line array CCD 26 can receive light signal, be output as digital signal " 1 " (after signal processing circuit is processed), and the part optical signals of being blocked by the liquid in transparent inditron 16 just passes not pass by, the picture dot of line array CCD 26 does not receive light signal, is output as digital signal " 0 ".Microprocessor 31 must arrive ⊿ L according to predetermined algorithm to digital signal processing 2(when measured object tilts, in two inditrons, liquid level occurs differentially, and the picture dot number of accepting light signal in two CCD do not equating, microprocessor comes Que to Ding ⊿ L by calculating its difference 2, its principle is proven technique in prior art, does not repeat them here), and then get is Dao ⊿ L 1, and according to tan Δ Q=⊿ L 1/ h obtains pitch angle Δ Q, finally by Δ Q, determines levelness.(note: ⊿ L 2=(N 2-N 1) d/2 wherein, N 1, N 2be respectively the picture dot number that is subject to illumination in two CCD, d is inter-pixel distance).
Fluid pressure type micrometric displacement amplifier unit has been that the effect of pre-transducer (is experienced Bei Ce Liang ⊿ L 1and be transformed to the L with Bei Ce Liang ⊿ by CCD 1the electric weight that has definite relation), also play simultaneously and propose high-resolution effect and (for example get (D/a) 2=100, be equivalent to the L Ba ⊿ 1amplify 100 times, wherein ， ⊿ L 2=(D/a) 2⊿ L 1, D is liquid storage pipe diameter, a is inditron diameter, as shown in Figure 9, and when the inter-pixel of getting CCD is when for 0.01mm, Ze Dui ⊿ L 1resolution from 0.01mm, become, 0.01mm/100=0.0001mm).

Claims (6)

1. a digital horizontal sensor, is characterized in that: comprises shell, in shell, is provided with Circuits System, hangs pendulum parts, fluid pressure type micrometric displacement amplifier unit and source of parallel light, wherein,
The structure of described Circuits System is: comprise microprocessor, CCD driving circuit, LED drive circuit, signal processing circuit and line array CCD, wherein, microprocessor is connected with the LED array of source of parallel light by LED drive circuit; Microprocessor is connected with line array CCD by CCD driving circuit; Microprocessor is connected with signal processing circuit, and signal processing circuit is connected with line array CCD;
The structure of described suspension pendulum parts is: comprise pendulum, T-shaped push rod, pendulum rotating shaft, pendulum is flexibly connected with pendulum rotating shaft by T-shaped push rod;
Described fluid pressure type micrometric displacement amplifier unit has two, its structure is: comprise liquid storage pipe and the inditron of being made by transparent material, wherein, liquid storage pipe is fastened and is formed by upper shell and lower house, in liquid storage pipe, be provided with diaphragm, diaphragm below is provided with push pedal, push pedal bottom is connected with push rod, correspondingly, lower house is provided with pilot hole, push rod is through pilot hole, push rod end and T-shaped push rod close contact: the push rod of a fluid pressure type micrometric displacement amplifier unit and one end close contact of T-shaped push rod, the push rod of another fluid pressure type micrometric displacement amplifier unit and the other end close contact of T-shaped push rod, inditron is positioned at liquid storage pipe top, and is communicated with liquid storage pipe through upper shell, source of parallel light is arranged on inditron side, and correspondingly, inditron opposite side is provided with line array CCD, and the light that source of parallel light is sent is irradiated on line array CCD through after inditron.
2. digital horizontal sensor according to claim 1, is characterized in that: the structure of described source of parallel light is: comprise LED array, frosted glass and cylinder lenses that ecto-entad is arranged in order; Between line array CCD and inditron, be also provided with the cylinder lenses for focusing on.
3. digital horizontal sensor according to claim 1, it is characterized in that: described shell consists of housing, the front shroud that is positioned at the upper cover plate on housing top and is positioned at housing front portion, surrounds a relatively airtight space between housing, upper cover plate and front shroud; Housing bottom is provided with two limited blocks, and pendulum is between two limited blocks.
4. digital horizontal sensor according to claim 1, is characterized in that: between upper shell and lower house, be connected by screw.
5. digital horizontal sensor according to claim 1, is characterized in that: described diaphragm is rubber diaphragm.
6. according to the digital horizontal sensor described in any one in claim 1～5, it is characterized in that: described inner walls is provided with circuit board and L-type bracket, L-type bracket is provided with pendulum rotary shaft base, microprocessor, CCD driving circuit, LED drive circuit, signal processing circuit are all fixed on circuit board, microprocessor 10 is connected with relevant data processing circuit to outside power supply by going between, pendulum rotating shaft is fixed in pendulum rotary shaft base, and fluid pressure type micrometric displacement amplifier unit is fixed on L-type support plate; LED array is fixed on LED array fixed head, and LED array fixed head and line array CCD are all fixed on holder, and holder is fixed on L-type bracket by holder bracket.
CN201410026868.9A 2014-01-21 2014-01-21 A kind of digital level sensor Expired - Fee Related CN103759712B (en)

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Publication number Priority date Publication date Assignee Title
CN104359409B (en) * 2014-11-27 2017-02-22 上海电力学院 Optics-based high-precision displacement sensor
CN111262639A (en) * 2020-01-17 2020-06-09 深圳市星网荣耀科技有限公司 Satellite portable communication device and self-adaptive horizontal adjustment method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359409B (en) * 2014-11-27 2017-02-22 上海电力学院 Optics-based high-precision displacement sensor
CN111262639A (en) * 2020-01-17 2020-06-09 深圳市星网荣耀科技有限公司 Satellite portable communication device and self-adaptive horizontal adjustment method thereof
CN111262639B (en) * 2020-01-17 2022-05-17 深圳市星网荣耀科技有限公司 Satellite portable communication device and self-adaptive horizontal adjustment method thereof

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