CN2442231Y

CN2442231Y - Laser level automatic scale

Info

Publication number: CN2442231Y
Application number: CN 00240659
Authority: CN
Inventors: 董大为
Original assignee: MEIHUA SCIENCE AND TECHNOLOGY (NANJING) LASER PRODUCTS Co Ltd
Current assignee: MEIHUA SCIENCE AND TECHNOLOGY (NANJING) LASER PRODUCTS Co Ltd
Priority date: 2000-10-19
Filing date: 2000-10-19
Publication date: 2001-08-08
Anticipated expiration: 2010-10-19

Abstract

The utility model relates to a scale for measurement which is composed of a main scale, a calculation circuit and a control circuit. The utility model is characterized in that an upper transmission wheel and a lower transmission wheel which are provided with transmission belts are arranged in the main scale, and two limit switches corresponding to the positions of the transmission wheels are arranged on one inner side wall of the main scale; a laser receiver is arranged on the transmission belt between the two limit switches, and a long trough-shaped filtering window is correspondingly arranged on the main scale; a motor is utilized to drive the transmission wheels through a speed reducing mechanism, and a display is arranged at the outer side wall of the main scale; a laser sensor, a limit switch, a display and a motor are arranged on the laser receiver and are all connected with the calculation circuit and the control circuit; a computer is utilized to realize the measuring action, the calculating action and the digital display. The utility model has the advantages that a datum plane can be calibrated quickly and exactly. A scale for measurement is suitable for the datum level calibration in the building operation and is particularly suitable for work under the state of strong light.

Description

The automatic scale of laser level

The utility model relates to a kind of measurement scale, refers to the automatic scale of laser especially.

At present, laser leveler is extensively sold in the international market, has also obtained widespread use in construction work, and in order to the laser level reference planes of standard to be provided, to indicate the base water plane in the construction, alternative optical level instrument is saved manpower.But present employed various laser levelers, because the restriction of Stimulated Light luminotron output power and the restriction (mainly being to prevent the damage from laser eyes) of safety in utilization, the brightness on its laser scanning plane is limited, is difficult to explanation under the stronger environment of daylight.During operation outside the venue, when using laser leveler to demarcate datum water level, need to use the hand-held laser pickoff, and this receiver will handed by the people, move up and down and seek the laser scanning plane, use extremely inconvenience, efficient is very low, sometimes be difficult to find laser scanning line, laser leveler used in constructing outside the venue be restricted.

The purpose of this utility model then is the problem that exists at above-mentioned prior art, provide a kind of and can search laser automatically in operation or the office operation outside the venue, and can show datum water level and scale base plane relative height described in the utility model with numeral, be convenient to the automatic scale of laser level of the datum water level of the laser beam sign of definite laser leveler rapidly.

The purpose of this utility model can reach by following measure:

The automatic scale of laser level described in the utility model comprises a main scale and a calculating control circuit that is arranged in main scale, is characterized in being fixed with in the inner chamber of main scale a power wheel and a lower driving wheel on; On near the madial wall of main scale the same side near the upper peripheral edge that reaches lower driving wheel the lower periphery of last power wheel, a upper limit position switch and lower position switch are housed respectively; The driving-belt that connects this two upper and lower power wheel is sleeved on the upper and lower power wheel, is fixed with a laser pickoff on this driving-belt, up and down between two limit switches; A display is housed on the lateral wall of main scale; Be equipped with respectively and the corresponding catch of upper and lower two limit switches upper and lower two ends of laser pickoff, and on the positive corresponding installed surface of itself and main scale one group of laser sensor is housed also, this group laser sensor joins with the signal input part that is arranged in the calculating control circuit of main scale inner chamber, and in the outer enclosure of this group laser sensor the anti-dazzling screen that prevents that the sunlight direct projection from disturbing is arranged; The control signal output ends of calculating control circuit is joined with the signal input end that is fixed in the main scale, and the display circuit in result of calculation output terminal and the display joins; Be connected with a reduction gearing mechanism on the main shaft of motor, reduction gearing mechanism is connected with lower driving wheel; The front of main scale is provided with a long groove shape window, between upper and lower two limit switches, and corresponding with the position of laser sensor on the laser pickoff, on this window, stud with the color filter that only laser beam is passed through.

Another characteristics of the above-mentioned technical solution of the utility model are: described calculating control circuit and control motor are by a DC power supply, this group sensor on the described laser pickoff is divided into, two groupings down, respectively and connect, and the signal output part after connecing inserts voltage amplifier signal input part separately respectively, the signal output part of voltage amplifier inserts rectifier filer signal input part separately respectively, the signal output part of rectifier filer inserts comparator circuit one signal input part separately respectively, another signal input part of comparator circuit inserts the reference voltage that power supply provides respectively, the signal output part of comparator circuit inserts the signal input part of amplifying circuit separately respectively, the signal output part of this two amplifying circuit inserts the binary signal input end of an automatic search control circuit and a signal input end mouth of a computing machine simultaneously, wherein go up, two limit switches insert the motor commutation control circuit down, and the signal output part of this control circuit also inserts a signal input part of automatic search control circuit; A H bridge control circuit that the signal output part of automatic search control circuit inserts and motor joins and a control port of computing machine; The computational data output terminal of computing machine and the signal input part of the display circuit in the display join; One displacement detecting circuit detects the scale on motor revolution or the main scale, and is converted into electric impulse signal output, and its output terminal inserts computing machine, by transporting to the relative height that display shows main scale substrate and laser level plane after the Computer Processing.

The another characteristics of the above-mentioned technical solution of the utility model are: be embedded with outside first chi outside the chi and second outside described main scale successively, wherein the first outer chi can stretch downwards along main scale, and the second outer chi can stretch downwards by chi outside first.

Characteristics again of the above-mentioned technical solution of the utility model are: the signal output part of two amplifying circuits in the described calculating control circuit, wherein with described sensor in the signal output part of going up the corresponding amplifying circuit of grouping sensor also insert the signal input part of last circuit of LED of the indicating circuit of an indication laser sensor position; Also insert the signal input part of the following circuit of LED of aforementioned indicating circuit with the signal output part of the corresponding amplifying circuit of following grouping sensor in the described sensor; When this indicating circuit has signal output simultaneously at this two amplifying circuit, produce control signal and insert the location circuit of LED of wherein set indication sensor location and a hummer that joins with it.

The above-mentioned solution of the utility model also has characteristics to be: described display is provided with power switch and is serially connected in the dc power supply loop, also be provided with the upper and lower hand control switch of the upper and lower motion of control laser sensor, insert a manual on-off circuit, the output terminal of this on-off circuit inserts the signal input part of automatic search control circuit.

Advantage of the present utility model: (1) adopts automatic scale described in the utility model, can indicate the datum water level that laser leveler scanning forms accurately, accurately determines reference plane on a large scale when being suitable for constructing apace, and can save manpower and nominal time.(2) employing the utility model is particularly useful for constructing on a large scale outside the venue and demarcates datum water level quickly and accurately in the construction under the high light condition, is not subjected to the workman to seek the restriction of laser beam under high light, and its laser search and location are finished the automaticity height automatically.(3) it is easy to operate to adopt the utility model to use, and its difference in height calibration range is big, collapsible, is easy to carry.

Below in conjunction with accompanying drawing technical solution of the present utility model is described in further detail:

What Fig. 1 provided is the utility model user mode reference diagram;

What Fig. 2 provided is the agent structure schematic appearance of an embodiment;

Fig. 3 is that the main scale internal mechanical structure master among Fig. 2 looks synoptic diagram;

Fig. 4 is the A-A cross-sectional schematic of Fig. 2;

Fig. 5 is that the laser signal in the described embodiment calculating control circuit is searched the treatment circuit block diagram;

Fig. 6 is that electric theory diagram is controlled in the automatic search in the described calculating control circuit;

Fig. 7 is control and the computer processing circuit electricity theory diagram in the calculating control circuit.

In Fig. 1, the 01st, laser scanning level meter, the 03rd, automatic scale described in the utility model.In the time will determining to construct datum water level, laser scanning level meter 01 is placed (indoor or other construction sites as shown in Figure 1) among the plane to be determined, open the laser scanning level meter, its laser head rotation sweep then, as indoor, then on indoor wall, produce the laser scanning light beam, should place wall to be measured by automatic scale 03, power-on, then when it receives laser beam, its display will show the relative height of automatic scale bottom to the laser beam plane, mark this position on wall, again scale 03 is placed the elsewhere, can the determined datum water level of Calibration of Laser bundle as long as measure at 3.As in construction outside the venue, same, as long as mark the relative height of ground, can determine the reference plane of constructing to the laser beam flying plane.

In Fig. 2, provided this agent structure of scale automatically, among the figure, the 35th, main scale, outside this main scale, be embedded with outside first chi 4 outside the chi 2 and second successively, this first outer chi can stretch downwards along main scale 35, and the second outer chi 4 can stretch downwards by chi 2 outside first, to increase the measuring height scope of main scale.Outside main scale and two, be equipped with the scale that indicates height on the chi.When the time spent of not doing the surface level location, can make common scale and use, be used for measuring height.

Fig. 3 has provided the inner structure of main scale 35: in the inner chamber of this main scale 35, its upper top is equipped with a battery case 11, be equipped with in the box to the supplying cell 07,09th that is fixed on calculating control circuit (not drawing among the figure) in the main scale inner chamber and motor 43 power supplies, connect the spring leaf of supplying cell and power supply line.Be provided with power wheel 13 in the top inner chamber of main scale, be fixed on the main scale by mount pad 15; Power wheel 33 is housed in the inner chamber of its underpart, fixing by the fixed support on the base 41 that is loaded on main scale 39; Control motor 43 is also fixed by this fixed support, and power wheel is housed on its main shaft to be connected with lower driving wheel 33 by driving-belt 37, form reduction gearing mechanism, this reduction gearing mechanism also can adopt gear reduction gear train or other reduction gearing mechanisms certainly; Upper limit position switch 57 and lower position switch 59 are housed respectively on the same sidewall of main scale 35, wherein upper limit position switch 57 is positioned near the lower periphery of power wheel, which is provided with a notch 58, lower position switch 59 is positioned near the upper peripheral edge of lower driving wheel, also is provided with notch 60 on it; The notch that driving-belt 19 passes on this upper and lower limit bit switch is sleeved on the upper and lower power wheel; Be fixed with a laser pickoff 17 on the driving-belt 19, between upper and lower

limit bit switch

57 and 59, two end parts are equipped with and the corresponding catch 53 of upper and lower limit bit switch (referring to Fig. 4) about it, with on the positive corresponding installed surface of main scale one group of laser sensor 23 is housed, and the outer enclosure of this group laser sensor has the anti-dazzling screen 51 (referring to Fig. 4) that prevents sunlight direct projection interference; Display 21 is housed on the lateral wall of main scale, which is provided with upper and lower hand control switch 47 that LCD 25, power switch 45, control motor rotate up and down and 49 and Search Control switch 29 once more; Laser sensor 23, display 21, control motor 43 join by the corresponding port of umbilical cable 27 with calculating control circuit; Also be provided with a long groove shape window 31 on the main scale front panel,, on this window, stud with the color filter that only laser beam is passed through between the upper and lower limit bit switch and corresponding with laser sensor 23 positions on the laser pickoff 17.Fig. 4 has provided the A-A cut-open view of Fig. 3, has further disclosed the inner structure of main scale 35.51 is anti-dazzling screens of laser sensor 23 outer enclosure among the figure, the 53rd, be contained in the catch of laser pickoff 17 upper and lower two ends, and the 55th, the interface board of calculating control circuit.

In the electric theory diagram that Fig. 5 provides, each element circuit all is made of typical circuit.Among the figure, laser sensing 23 is divided into, following two grouping 23-1 and 23-2, connected with each other respectively, and the signal output part after connecing insert respectively separately voltage amplifier 651 and 652 signal input part, signal output part after it amplifies inserts the signal input part of rectifier filer 691 separately and 692 respectively, output terminal behind the rectifying and wave-filtering inserts a signal input part of comparator circuit 711 separately and 712 respectively, another signal input part of comparator circuit joins with the reference voltage 67 that dc power supply provides respectively, the signal output part of comparator circuit inserts amplifying circuit 731 and 732 separately respectively, produces corresponding control signal by it and exports subsequent conditioning circuit to by

output terminal

97 and 95.

In Fig. 6, with grouping 23-1 on the laser sensor and down the corresponding binary

signal output terminal

97 and 95 after amplifying circuit is handled of grouping 23-2 insert the signal input part of automatic search control circuit 99 respectively, also insert the signal input end of the indicating circuit 88 of indication laser sensor position simultaneously, wherein corresponding with last grouping laser sensor 23-1 amplifying circuit signal output part 97 drives the last circuit of LED 87 of indication laser sensor position, with the following circuit of LED 91 of the corresponding amplifying circuit signal output part of following grouping sensor 23-2 95 driving indication sensor positions, this indicating circuit 88 produces control signal driving indication sensor location when

output terminal

97 and 95 all has signal output location circuit of LED 89 reaches the hummer 93 that joins with it.Upper and lower

limit bit switch

57 and 59 control signals that produce insert the signal input part of motor commutation control circuit 75, wherethrough reason back produces the signal input end that control signal is imported automatic search control circuit 99, be located at control signals that the upper and lower manual switch 47 and 49 of the upper and lower motion of control laser sensor on the display produces after manual ON-OFF control circuit 77 processing, the control signal of generation also inserts the signal input part of automatic search control circuit 99; Automatically the control signal output ends of search control circuit generation inserts the H bridge control circuit 81 that joins with motor 43, with the motion of control motor 43.In order to guarantee motor safety work, in H bridge control circuit 81, also be provided with a current-limiting protection circuit 79.85 is feed circuit among the figure, and it provides operating voltage and be the calculating control circuit power supply for motor 43, and wherein 07 is supplying cell, the 45th, and power switch.

In Fig. 7, after the control signal output ends 97 and 95 after two amplifying circuits 731 and 732 processing is also respectively through a buffer circuit 107, insert the signal input end of computing machine 105 simultaneously, 101 is displacement detecting circuits, can adopt the photoelectric sensing testing circuit, light head is corresponding with the light hole position on motor 43 main shafts with detecting, measure the revolution of motor 43, it is transformed into electric impulse signal exports the displacement that computing machine 105 calculates laser pickoff 17 to; Also can select control motor 43 for use the pulse step motor, displacement detecting circuit adopts the pulse signal testing circuit, detects its step-by-step impulse number of counting, delivers to computing machine 105 computings, converts thereof into the displacement of laser pickoff 17; Can also adopt photoelectric detective circuit, with shaven head be fixed on the corresponding travelling belt 19 in upper limit position switch 59 positions on or on the laser pickoff 17, detect the scale mark number on main scale 35 front panels, convert thereof into electric pulse, deliver to computing machine 105 and carry out step-by-step counting and computing, measure the displacement of laser pickoff.The pulse signal output that this displacement detecting circuit produces is transported to the data input port of computing machine 105 after 103 shapings of pulse shaping circuit; Automatically the signal output part of search control circuit also inserts a control port of computing machine 105 simultaneously.

Principle of work of the present utility model is as follows:

(1) when needs are demarcated a datum water level, start laser leveler 01 earlier, make it produce the laser beam of rotation.Then automatic scale described in the utility model is placed selected position, the vertical placement, power-on switch 45, then motor 43 gets electric forward rotation, driving lower driving wheel 33 by gearing-down band 37 rotates, thereby drive driving-belt 19 transmissions, the laser pickoff 17 that this moment, initial position was positioned at lower position switch 59 places moves up, search for the laser beam of this rotation, the work of simultaneous displacement testing circuit, the displacement of detection laser sensor 23, and the electric impulse signal that detects is delivered to computing machine 105 carry out accumulated counts, calculate and handle.When not searching the laser beam of rotation, laser pickoff moves on continuing, during upper stop piece 53 pressing upper limit position switch 57 on laser pickoff, this moment, upper limit position switch produced a switching signal, after delivering to motor reversing circuit 75 processing, produce the motor commutation control signal and transport to automatic search control circuit 99 processing, by its output control signal, deliver to H bridge control circuit 81 on the one hand, make motor 43 counter-rotatings, deliver to computing machine 105 on the other hand, give control signal of computing machine, make computing machine by accumulated counts, calculating is converted to countdown, calculate, simultaneously, laser pickoff 17 will move down, and search rotary laser downwards; As still searching less than laser beam, then laser pickoff continues to moving down, during lower stop piece 53 pressing lower position switch 59 on moving to it, then lower position switch produces switching signal after motor reversing circuit 75 is handled, produce the motor commutation control signal, after search control circuit 99 is handled automatically, producing output signal controls motor 43 on the one hand and just is changed to by counter-rotating and changes, give computing machine 105 1 control signals on the other hand, make it transfer accumulated counts, calculating (this computer-chronograph zero clearing) to, finish search process one time by countdown, calculating.If seek less than laser beam through repeatedly searching for, illustrate that then the surface level that laser beam is demarcated is positioned on the height of main scale 35, at this moment, can outwards pull out first outer chi 2, the second outer chi 4 outside its main scale, increase the measuring height of this automatic scale, measure the Calibration of Laser plane of scanning motion again.

(2) in laser pickoff 17 moves up process, when searching laser beam, three kinds of situations there is this moment:

First kind of situation is: the arbitrary laser beam that receives among the upward grouping laser sensor 23-1 in the laser sensor 23 on the laser pickoff 17 is (because laser beam is rotating, it rotates a circle needs the regular hour), be that its arbitrary laser sensor receives the laser beam that the window 31 that passes on the main scale 35 and the exciter filter that is bumped into thereof are transmitted, then this laser sensor conducting, export an electric impulse signal to voltage amplifier 651, after it amplifies, again through rectifier filer 691 rectifying and wave-filterings, obtain corresponding d. c. voltage signal, delivering to comparator circuit 711 compares with reference voltage 67, take out its differential signal again after amplifying circuit 731 carries out the signal amplification, one route output terminal 97 is delivered to automatic search control circuit, one the road delivers to indicating circuit 88, last light emitting diode in the circuit of LED 87 in the indicating circuit is got, thereby carry out luminous demonstration, the position that indicates laser beam this moment is positioned on the laser sensor point midway; At this moment, automatically after search control circuit 99 is received the control signal that output terminal 97 sends here, the wherethrough control signal of getting a haircut out is given the H bridge control circuit 81 of motor 43, the control motor continue just to change (so the time laser beam the position be positioned at the first half of laser sensor, and position therebetween not), driving laser sensor continues up; Simultaneously, the signal of amplifying circuit 731 output terminals is sent into computing machine 105 after also being handled by a buffer circuit 107, and control computer is proceeded accumulated counts, calculating; When laser sensor goes upward to upper stop piece 53 pressing upper limit position switch 57 on it, then repeat the course of work of aforementioned ().

Second kind of situation is: arbitrary sensor receives laser beam among the following grouping laser sensor 23-2 in the laser sensor 23 on the laser pickoff 17, then this laser sensor conducting this moment, producing an electric impulse signal delivers to voltage amplifier 652 and amplifies, signal after the amplification is again behind rectifier filer 692 rectifying and wave-filterings, obtain d. c. voltage signal, delivering to comparator circuit 712 compares with reference voltage 67, take out its differential signal, after amplifying circuit 732 amplifies, by output terminal 95 outputs, one the road delivers to automatic search control circuit 99, handle the back by it and produce control signal and deliver to H bridge control circuit 81 in the motor 43, make the motor counter-rotating (so the time laser beam the position be in the latter half of laser sensor); Indicating circuit 88 is delivered on another road, and it is electric that following light emitting diode in the circuit of LED 91 is wherein got, thereby carry out luminous demonstration, and the position that indicates laser beam this moment is positioned under the laser sensor mid point; Simultaneously, this signal of output terminal 95 is sent into computing machine 105 after buffer circuit 107 bufferings, carry out countdown, calculation control signal for one in computing machine, makes computing machine carry out countdown, calculating; After the motor counter-rotating, will drive laser pickoff and move down search, when laser sensor comes downwards to lower stop piece 53 pressing lower position switch 59 on it, then repeat the course of work of above-mentioned ().

The third situation is: in the laser sensor 23 on the laser pickoff 17 go up among grouping 23-1 and the grouping 23-2 down two adjacent laser sensors of grouping place up and down receive simultaneously laser beam (promptly go up in the grouping the most next laser sensor and down the laser sensor of going up most in the grouping receive laser beam simultaneously), then among grouping 23-1 and the following grouping 23-2 laser sensor conducting is arranged all on the laser sensor, after the electric impulse signal that their produce passes through signal processing under aforesaid first kind of situation and the second kind of situation respectively, simultaneously by

output terminal

97 and 95 output signals, this binary signal is sent into automatic search control circuit 99 on the one hand simultaneously, making its output control signal after the wherethrough reason is low level, thereby the H bridge control circuit in the control motor 43 makes motor 43 dead electricity stalls; This binary signal is also delivered to indicating circuit 88 simultaneously on the other hand, this moment circuit of LED 87 and 91 dead electricity in the indicating circuit 88, last light emitting diode reaches following light emitting diode dead electricity and extinguishes, and the indication laser sensor be in the location circuit of LED 89 of " location " (being position between laser beam occupy among the laser sensor) must, its light emitting diode conducting is luminous, the indication laser beam is in the laser sensor centre position, hummer 93 gets simultaneously, send the buzzing alerting signal, prompting is the mensuration state this moment, and promptly the numerical value that shows on the display 21 is the relative height between plane, laser beam place and the main scale bottom; Simultaneously, this binary signal by

output terminal

97 and 95 outputs is also sent into computing machine simultaneously after buffer circuit 107 bufferings, under this binary signal control, computing machine stops counting and calculates, and current result of calculation value is transported to display circuit 25 in the display 21 by delivery outlet carry out numeral and show, so that read.Indicate this height value, again the utility model is carried out work at other Chosen Points, can obtain the relative height value of other locations and laser leveler horizontal scan face.Be the datum water level of required demarcation by the plane that these measuring points determined.

The counting of computing machine, the evaluation work principle is: at first insert the relative height value between the bottom of main scale 35 and laser pickoff 17 reference positions (being lower stop piece 53 on the laser pickoff position when contacting pressing with lower position switch 59) in the computing machine in advance, when starting the utility model work, then motor 43 beginnings are just changeed, the detection mode that simultaneous displacement testing circuit 101 bases are selected becomes the electric pulse digital signal with the displacement conversion of laser pickoff, after 103 shapings of pulse shaping circuit, send into computing machine and carry out accumulated counts, and carry out Conversion Calculation according to corresponding conversion relation.If displacement detecting circuit adopts aforesaid photoelectric sensing testing circuit, then it converts the revolution of motor 43 to electric impulse signal and delivers to computing machine 105 and carry out accumulated counts, and change the displacement relation of receiving device and the relation of electric pulse number is calculated according to motor revolution and laser, calculate the shift value of laser sensor, with the prevalue addition, draw the displacement absolute value of laser sensor then.As adopt aforesaid pulse step motor, then displacement detecting circuit detects the step-by-step impulse of stepper motor, to deliver to the computing machine cumulative calculation after this pulse signal shaping, carry out computing according to the umber of pulse of stepper motor and the displacement relation of motor revolution and laser pickoff equally, draw the displacement absolute value that promptly gets laser sensor behind its displacement again with the prevalue addition.If adopt the scale mark number on the aforesaid photoelectric sensing circuit detection main scale 35, then testing circuit is with counting through scale mark in the laser pickoff moving process, convert electric impulse signal to and send into the computing machine accumulation calculating, and be converted into the displacement of laser pickoff according to the displacement of each scale representative, with the presetting bit addition, draw its absolute value again.Because computing machine is when counting and computing, its calculation processes is subjected to, the control of the laser beam signal that the control of lower position switch and the laser sensor on the laser pickoff receive, when laser pickoff by lower position switch when upper limit position switch moves, computing machine carries out the pulse accumulation counting and calculates, when if laser sensor detects laser beam in this process, then it produces counting, the counting of signal calculated control computer, account form, if this signal is from last grouping laser sensor 23-1, illustrate that then laser beam is positioned at receiver the first half, this signal was controlled on the one hand on motor 43 continuation just commentaries on classics drive laser pickoff and was moved this moment, and control computer is proceeded accumulated counts and computing on the one hand; If this signal under the laser sensor 23-2 that divides into groups, illustrate that then laser beam is positioned at laser pickoff the latter half, this moment, this signal was controlled the motor counter-rotating on the one hand, drove laser pickoff and moved down, control computer is carried out countdown and computing on the one hand; Have only when signal output is all arranged in laser sensor divides into groups up and down, this moment laser beam just in time be positioned among the laser sensor between the position, this moment, this binary signal was controlled the motor stall on the one hand, control computer stops counting, calculates on the one hand, with the back output that adds up of current calculated value and prevalue, this numerical value is the relative height of laser scanning plane and main scale 35.If laser sensor detects less than laser beam, then move past journey on the laser sensor, computing machine carries out accumulated counts and calculating, until the counter-rotating of motor under the upper limit position switch effect, when laser sensor moves down, computing machine will change countdown and computing into by former accumulated counts and computing under this switching signal control, when laser pickoff is returned to lower position switch, computing machine counts down to zero, and the computing value returns zero, realizes zero clearing.And then repetition said process.

Manual control principle of the present utility model is: during last mobile switching control 47 on pressing display 21, then it produces a switching signal and produces a control signal by manual switch circuit 77 and transport to automatic search control circuit 99 and make it produce motor just to change the H bridge control circuit 81 that control signal delivers to motor 43 motor 43 is just being changeed, driving on the laser pickoff and move; Equally, during following mobile switching control 49 on pressing display, then the switching signal of its generation also produces corresponding control signal by manual switch circuit 77 and transports to automatic search control circuit 99, produce the motor reverse control signal by it and transport to H bridge control circuit 81, the counter-rotating of control motor drives laser pickoff and moves down.

Claims

1, the automatic scale of laser level comprises a main scale (35) and is arranged in a calculating, the control circuit of this main scale, it is characterized in that being fixed with a power wheel on (13) and a lower driving wheel (33) in the inner chamber of main scale (35); On near the madial wall of main scale the same side near the upper peripheral edge that reaches lower driving wheel (33) lower periphery of last power wheel (13), a upper limit position switch (57) and a lower position switch (59) are housed respectively; Connect this up and down the driving-belt (19) of two power wheels be sleeved on the lower driving wheel, on this driving-belt (19), be fixed with a laser pickoff (17), be positioned between upper and lower two limit switches (57 and 59); One display (21) is housed on the lateral wall of main scale (35); Be equipped with respectively and the corresponding catch of upper and lower two limit switches (53) upper and lower two ends of laser pickoff (17), and on itself and the corresponding installed surface of main scale (35) one group of laser sensor (23) is housed also; This group laser sensor be arranged in the calculating of main scale inner chamber, the signal input part of control circuit joins, and its outer enclosure has the anti-dazzling screen (51) that prevents that the sunlight direct projection from disturbing; The control signal output ends of calculating, control circuit is joined with the signal input part that is fixed in the control motor (43) in the main scale, and the display circuit in its result of calculation output terminal and the display (21) joins; Connect a reduction gearing mechanism (37) on the main shaft of motor (43), the output stage of this reduction gearing mechanism is connected with lower driving wheel (33); The front of main scale (35) is provided with a long groove shape window (31), between upper and lower two limit switches, and corresponding with the position of laser sensor (23) on the laser pickoff (17), on this window, stud with the color filter that only laser beam is passed through.

2, the automatic scale of laser level according to claim 1, it is characterized in that described calculating, control circuit and control motor (43) are powered by a direct current power supply (07), this group laser sensor (23) on the described laser pickoff (17) is divided into, two groupings (23-1 and 23-2) down, respectively and connect, and the signal output part after connecing inserts the signal input part of voltage amplifier (651 and 652) separately respectively, the signal output part of voltage amplifier inserts rectifier filer (691 and 692) signal input part separately respectively, the signal output part of rectifier filer inserts a signal input part of comparator circuit (711 and 712) separately respectively, another signal input part of comparator circuit joins with the reference voltage output end of the reference voltage source (67) that is provided by power supply (07) respectively, and the signal output part of comparator circuit inserts the signal input part of amplifying circuit (731 and 732) separately respectively; The signal output part of this two amplifying circuit (97 and 95) inserts the binary signal input end of automatic search control circuit (99) and a signal input end mouth of a computing machine (105) simultaneously, described upper and lower two limit switches (57 and 59) insert a motor commutation control circuit (75), and the signal output part of this control circuit inserts a signal input part of automatic search control circuit (99); A H bridge control circuit (81) that the signal output part of automatic search control circuit (99) inserts and motor (43) joins and a control port of computing machine (105); Display circuit signal input part in the computational data output terminal of computing machine (105) and the display (21) joins; The revolution of motor (43) or the scale mark number on its electric pulse number or the main scale (35) are detected in its test section of one displacement detecting circuit (101), and the data-signal input port of its pulse signal output end and computing machine (105) joins.

3, the automatic scale of laser level according to claim 1 and 2, it is characterized in that being embedded with successively outside the described main scale (35) the first outer chi (2) and the second outer chi (4), wherein the first outer chi (2) can stretch downwards along main scale, and the second outer chi (4) can stretch downwards by chi (2) outside first.

4, the automatic scale of laser level according to claim 1 and 2, it is characterized in that described calculating, the signal output part of two amplifying circuits in the control circuit (97 and 95), wherein with described sensor (23) in the signal output part (97) of going up the corresponding amplifying circuit of grouping sensor (23-1) also insert the signal input part of last circuit of LED (87) of the indicating circuit (88) of an indication laser sensor position, insert the signal input part of the following circuit of LED (91) of aforementioned indicating circuit (88) with the signal output part (95) of the corresponding amplifying circuit of following grouping sensor (23-2) in the described sensor (23); Also be provided with the location circuit of LED (89) and a hummer that joins with it (93) of an indication sensor (23) location in this indicating circuit.

5, the automatic scale of laser level according to claim 3, it is characterized in that described calculating, the signal output part of two amplifying circuits in the control circuit (97 and 95), wherein with described sensor (23) in the signal output part (97) of going up the corresponding amplifying circuit of grouping sensor (23-1) also insert the signal input part of last circuit of LED (87) of the indicating circuit (88) of an indication laser sensor position, insert the signal input part of the following circuit of LED (91) of aforementioned indicating circuit (88) with the signal output part (95) of the corresponding amplifying circuit of following grouping sensor (23-2) in the described sensor (23); Also be provided with one in this indicating circuit and refer to a location circuit of LED (89) and the hummer that joins with it (93) that sensor (23) is located.

6, the automatic scale of laser level according to claim 1 and 2, it is characterized in that described display (21) is provided with power switch (45) and is serially connected in the current supply circuit of power supply (07), also be provided with the upper and lower hand control switch (47 and 49) of the upper and lower motion of control laser sensor (23), insert a manual on-off circuit (75), the output terminal of this on-off circuit (75) inserts the signal input part of automatic search control circuit (99).

7, the automatic scale of laser level according to claim 3, it is characterized in that described display (21) is provided with power switch (45) and is serially connected in the current supply circuit of power supply (07), also be provided with the upper and lower hand control switch (47 and 49) of the upper and lower motion of control laser sensor (23), insert a manual on-off circuit (75), the output terminal of this on-off circuit (75) inserts the signal input part of automatic search control circuit (99).

8, the automatic scale of laser level according to claim 4, it is characterized in that described display (21) is provided with power switch (45) and is serially connected in the current supply circuit of power supply (07), also be provided with the upper and lower hand control switch (47 and 49) of the upper and lower motion of control laser sensor (23), insert a manual on-off circuit (75), the output terminal of this on-off circuit (75) inserts the signal input part of automatic search control circuit (99).

9, the automatic scale of laser level according to claim 5, it is characterized in that described display (21) is provided with power switch (45) and is serially connected in the current supply circuit of power supply (07), also be provided with the upper and lower hand control switch (47 and 49) of the upper and lower motion of control laser sensor (23), insert a manual on-off circuit (75), the output terminal of this on-off circuit (75) inserts the signal input part of automatic search control circuit (99).

10, the automatic scale of laser level according to claim 1 and 2, it is characterized in that the displacement detecting circuit (101) in described calculating, the control circuit is a photoelectric sensing testing circuit, it is corresponding that it detects the light hole position of offering on luminous probe and motor (43) main shaft, and its electric impulse signal output terminal inserts the data input port of computing machine (105).

11, the automatic scale of laser level according to claim 1 and 2, it is characterized in that described displacement detecting circuit (101) is a pulse signal testing circuit, the pulse signal output end of stepper motor (43) inserts the signal input part of this circuit, and its pulse signal output end inserts the data-signal input port of computing machine (105).

12, the automatic scale of laser level according to claim 1 and 2, it is characterized in that the displacement detecting circuit (101) in described calculating, the control circuit is a photoelectric detective circuit, its shaven head be fixed on go up with the corresponding travelling belt in upper limit position switch (57) position (19) or laser pickoff (17) on, its pulse signal output end inserts the data-signal input port of computing machine (105).