CN104596408A - Automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen - Google Patents
Automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen Download PDFInfo
- Publication number
- CN104596408A CN104596408A CN201510062973.2A CN201510062973A CN104596408A CN 104596408 A CN104596408 A CN 104596408A CN 201510062973 A CN201510062973 A CN 201510062973A CN 104596408 A CN104596408 A CN 104596408A
- Authority
- CN
- China
- Prior art keywords
- wheel shaft
- display panel
- hall element
- distance
- contact wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to an automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen comprising a waterproof housing (1), a liquid crystal display panel (2), a collection key (3), a contact wheel shaft (4), a hall element (5), a signal amplifier (6), a analog-digital converter (7), a micro processor (8), a digital single-axis gyroscope (9), a display panel drive device (10), a battery (11) and a back clamp (12). The collection key (3) is pressed, the contact wheel shaft (4) rolls on the surface of an object to be measured, the distance between a stripped magnet and the hall element (5) changes regularly, and the strength of the magnetic field surrounding the hall element (5) changes regularly; according to the hall principle, the distance amount is calculated according to the change amount of hall potential difference through the micro processor (8), the change amount of the dip angle of the waterproof housing (1) detected by the digital single-axis gyroscope (9) is combined, the error caused by the change of the dip angle in the measuring process is compensated, and counting is performed through the liquid crystal display panel (2) to achieve the distance measuring purpose. The pen is reasonable in structure, accurate in measurement, convenient to use, high in adaptability, energy saving and environment-friendly.
Description
Technical field
The present invention relates to a kind of high-precision contact-type electronic distance measuring equipment, particularly there is the contact electromagnetic induction waterproof distance-measurement pen at an energy auto-compensation body pitch angle of the application Hall element of water-proof function.
Background technology
People are life, out on tours at home, enterprise product design, ground observation, military training, operation etc. all need frequently on map or real space cathetus, length of a curve measure; The method of experiment curv length public is at present the shape simulating curve with a rope, then by stretching for rope its length of measurement, the shortcoming of this method for being not easy to carry, precision is low, its measurement result has very big error.Meanwhile, also have some range finding products on the market, it adopts the distance measuring method of mechanical type, halo formula, photo-electric respectively; Wherein mechanical distance-measuring equipment one roller surveys curvilinear motion along wish, numeral (patent No.: CN200920052864.2) is shown by driving pointer after series of gears reduction of speed, this instrument build is large, reset in inconvenience, precision and owe accurately, and complicated in mechanical structure precision to cause its resistance to mechanical impact capacity poor; The distance measuring method of halo formula is for move along prediction curve with a grating wheel, by laser grating counted thus draw find range from (patent No.: CN99248685.8), the grating of this instrument cannot do enough intensive by technique restriction, cause measuring accuracy not good enough, and because grating is minimum, is easily damaged in using and causes equipment scrapping.Simultaneously, above contact pen type distance-measuring equipment is due to the change of user's wrist angle in moving process, body can with the hand exercise run-off the straight of user, solderless wrapped connection wheel trolley axis does circular motion, thus cause the relative displacement of described contact wheel outside surface relative body generation noncontact wheel caused by testee surface scrolls, cause measured data to change and cause error.And the equipment of photo-electric needs continuous utilizing emitted light pulse in measuring process and uses photoreceptor to receive, simultaneously use single-chip microcomputer constantly to add up signal intensity that photoreceptor produces is to calculate the displacement (number of patent application: CN201310450737.9) of nib relative to testee surface, this mode needs the change of the measured surface reflected light read received by photoreceptor, in smooth surface and the testee of favourable identity surface use be extremely restricted, and its photoelectric sensing module adopted needs to launch, receive and resolve light pulse, cause the higher battery life of power consumption shorter, be unfavorable for energy-conserving and environment-protective and long-time use.Meanwhile, above range finding means all exist and are not easy to carry out water-proofing treatment, and the shortcoming that cannot use under water, the scope of application is restricted.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, a kind of high precision contact electromagnetic induction distance-measurement pen of an energy auto-compensation body pitch angle of waterproof of strong shock resistance is provided.The present invention is rational in infrastructure, and measuring accuracy is high, easy to use, and applicability is strong, energy-conserving and environment-protective, and long service life.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen, comprises waterproof case, liquid crystal digital display panel, gathers button, contacts wheel shaft, Hall element, signal amplifier, analog to digital converter, microprocessor, digital quantity single axis gyroscope, digital display panel driver, battery, back splint; Described waterproof case upper surface is inlaid with and gathers button, liquid crystal digital display panel, and lower surface is fixed with back splint, is inside provided with battery, Hall element, signal amplifier, analog to digital converter, microprocessor, digital quantity single axis gyroscope, digital display panel driver; Described distance-measurement pen also comprises the contact wheel shaft being arranged at waterproof case front end, and described contact wheel shaft comprises solid plastic main body, rubber surface coating and is embedded in the bar magnet of its side; Described contact wheel shaft is buckled and waterproof case front end plastic joining by the C type of waterproof case outside surface; Battery and digital display panel driver, microprocessor are electrically connected, and power to microprocessor and digital display panel driver; Hall element and signal amplifier are electrically connected; Analog to digital converter and described signal amplifier are electrically connected; Described analog to digital converter, collection button, digital quantity single axis gyroscope are electrically connected with microprocessor respectively, and form the input signal of described microprocessor together; Digital display panel driver and described microprocessor are electrically connected, and receive the output signal of microprocessor; Liquid crystal digital display panel and described digital display panel driver are electrically connected.
The present invention utilizes the Hall effect of Hall element, along with contact wheel shaft is at testee surface scrolls, the bar magnet being fixed on contact wheel shaft side moves in a circle with the axle center of rotation solderless wrapped connection wheel trolley axle of contact wheel shaft, make described bar magnet be mechanical periodicity apart from the air line distance of Hall element, apart from the change of Hall element distance, rule changes by described bar magnet to cause the magnetic field intensity around described Hall element; Due to the Hall effect of Hall element, the Hull voltage between its two output pin and the magnetic field intensity linear correlation around it, therefore can go out the field intensity of its surrounding magnetic field by formulae discovery from the Hull voltage between described Hall element two output pin; The air line distance of described bar magnet apart from Hall element is gone out by formulae discovery from the field intensity of described Hall element surrounding magnetic field; Go out by formulae discovery the distance that described contact wheel shaft outside surface rotates relative to waterproof case from described bar magnet apart from the air line distance of Hall element; The change at the angle of inclination in waterproof case solderless wrapped connection wheel trolley axle axle center can be calculated from the digit pulse input of described digital quantity single axis gyroscope; The non-due to the relative displacement of described contact wheel shaft caused by testee surface scrolls of described contact wheel shaft outside surface relatively described waterproof case generation is gone out by formulae discovery from the change at the angle of inclination in described waterproof case solderless wrapped connection wheel trolley axle axle center; Described contact wheel shaft outside surface is deducted the relative displacement of non-described contact wheel caused by testee surface scrolls of the relatively described waterproof case generation of described contact wheel outside surface relative to the distance that waterproof case rotates, reach compensate due to waterproof case tilt bring the object of error, and calculate the distance of contact wheel shaft in the actual advance in testee surface of distance-measurement pen, and count on liquid crystal digital display panel, reach the object of measuring distance.
Further, the formula that described electric potential difference between Hall element two output pin calculates the field intensity of its surrounding magnetic field is: B=U
h÷ (K
h× I
s); Wherein B represents the magnetic induction density perpendicular to Hall element workplace, U
hrepresent the Hull voltage between Hall element two output pin, K
hrepresent the Hall coefficient of Hall element, I
srepresent the electric current flowing through Hall element; Wherein B and U
hlinearly be correlated with, K
h, I
sbe constant for same Hall element.
Further, the described calculating of the field intensity from Hall element surrounding magnetic field bar magnet apart from the formula of the air line distance of Hall element is: x=(ln (B)-ln (3.9405)) ÷ (-0.187); Wherein x states the air line distance between bar magnet in described contact wheel shaft and described Hall element, and B represents the magnetic induction density perpendicular to Hall element workplace.
Further, the formula that the described air line distance from bar magnet apart from Hall element calculates the distance that described contact wheel shaft outside surface rotates relative to waterproof case is: d
0=(π × arccos((2x-25) ÷ 30)) ÷ 600; Wherein d
0represent that the distance that described contact wheel shaft outside surface rotates relative to waterproof case, x represent the air line distance between bar magnet in described contact wheel shaft and described Hall element.
Further, from the variable quantity at described waterproof case angle of inclination calculate the relatively described waterproof case of described contact wheel shaft outside surface occur the non-formula due to the relative displacement of described contact wheel shaft caused by testee surface scrolls be: d
1=(△ θ × π)/60; Wherein d
1represent that the relatively described waterproof case of described contact wheel shaft outside surface occurs non-due to the relative displacement of described contact wheel shaft caused by testee surface scrolls, △ θ represents the variable quantity at described waterproof case angle of inclination.
Further, what the distance of rotating relative to waterproof case from described contact wheel shaft outside surface, the relatively described waterproof case of described contact wheel shaft outside surface occurred non-ly because the relative displacement of described contact wheel shaft caused by testee surface scrolls calculates described contact wheel shaft at the formula of the actual distance of rolling in testee surface is: d
2=d
0-d
1; Wherein d
2represent that described contact wheel shaft is in the actual distance of rolling in testee surface, d
0represent the distance that described contact wheel shaft outside surface rotates relative to waterproof case, d
1represent that the relatively described waterproof case of described contact wheel shaft outside surface occurs non-due to the relative displacement of described contact wheel shaft caused by testee surface scrolls.
The present invention has following beneficial effect:
1. the present invention adopts Hall element, and utilize Hall effect to measure nib displacement, distance accuracy reaches 0.005cm, and described Hall element power consumption is low, has that distance accuracy is high, the advantage of energy-conserving and environment-protective;
2. the present invention adopts digital quantity single axis gyroscope to detect the change of pitch angle of waterproof case in ranging process, and by formula, this change is compensated, identical all the time inclination angle need not be kept during use to avoid error, arbitrarily solderless wrapped connection can touch the angle that axle axis changes waterproof case, find range comfortable flexibly;
3. the present invention adopts contact wheel shaft to find range in the mode of testee surface pivots, can measure straight line, length of a curve, and can use on the plane of various material, curved surface;
4. the physical construction of the present invention only contacts wheel shaft one example, and without the need to having physical contact with the structure in waterproof case, therefore be easy to adopt waterproofing design, can use under water, suitable environment scope is wide;
5. the contact wheel shaft that adopts of the present invention is by C shape button and waterproof case outside surface plastic joining, convenient contact wheel shaft wearing and tearing or aging after change;
6. physical construction of the present invention is simple, reasonable in design, and internal components and external environment condition are isolated, therefore excellent the and long service life of dependable performance, mechanical shock resistance;
7. compact of the present invention, without sharp corners, and rear surface is provided with back splint, is easy to carry.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention; In figure: (1)-waterproof case; (2)-liquid crystal digital display panel; (3)-gather button; (4)-contact wheel shaft; (5)-Hall element; (6)-signal amplifier; (7)-analog to digital converter; (8)-microprocessor; (9)-digital quantity single axis gyroscope; (10)-digital display panel driver; (11)-battery; (12)-back splint.
Fig. 2 is the structural representation of electromagnetic induction of the present invention range finding head; Described electromagnetic induction range finding head is made up of (4)-contact wheel shaft, (5)-Hall element.
Fig. 3 is the structural representation of (4) of the present invention-contact wheel shaft; In figure: (13)-contact wheel shaft plastic body; (14)-rubber surface coating; (15)-bar magnet.
Fig. 4 gives (4) of the present invention-contact wheel shaft and waterproof case links the mode connect by C shape; In figure: (4)-contact wheel shaft; (16)-C shape button.
Fig. 5 gives between the magnetic field intensity around air line distance apart from Hall element of bar magnet in the present invention and described Hall element by the image of testing the funtcional relationship obtained.
Fig. 6 gives the image of distance-measurement pen funtcional relationship between the testee actual displacement in surface and the air line distance of described bar magnet distance Hall element in the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.。
Shown in composition graphs 1, the present invention includes waterproof case 1, liquid crystal digital display panel 2, gather button 3, contact wheel shaft 4, Hall element 5, signal amplifier 6, analog to digital converter 7, microprocessor 8, digital quantity single axis gyroscope 9, digital display panel driver 10, battery 11, back splint 12, wherein jointly form electromagnetic induction range finding head by contact wheel shaft 4, Hall element 5, jointly form range-measuring circuit by Hall element 5, signal amplifier 6, analog to digital converter 7; Described waterproof case 1 front end is provided with contact wheel shaft 4, upper surface is inlaid with and gathers button 3, liquid crystal digital display panel 2, lower surface is fixed with back splint 12, is inside provided with battery 11, Hall element 5, signal amplifier 6, analog to digital converter 7, microprocessor 8, digital quantity single axis gyroscope 9, digital display panel driver 10; Described battery 11 is electrically connected with digital display panel driver 10, microprocessor 8, power to microprocessor 8, digital display panel driver 10, and powered to range-measuring circuit, digital quantity single axis gyroscope 9 by microprocessor 8, power to liquid crystal digital display panel 2 by digital display panel driver 10; Hall element 5 and signal amplifier 6 are electrically connected, and are amplified the Hall voltage difference signal between described Hall element 5 liang of output pins by signal amplifier 6, generate the simulating signal of standard; Analog to digital converter 7 and described signal amplifier 6 are electrically connected, and the simulating signal that signal amplifier 6 inputs is converted to digital pulse signal; Described analog to digital converter 7, collection button 3, digital quantity single axis gyroscope 9 are electrically connected with microprocessor 8 respectively, and form the input signal of described microprocessor 8 together; Digital display panel driver 10 and described microprocessor 8 are electrically connected, and receive the output signal of microprocessor 8; Liquid crystal digital display panel 2 and described digital display panel driver 10 are electrically connected, and control liquid crystal digital display panel 2 count by described digital display panel driver 10.
Shown in composition graphs 2, contact wheel shaft 4 in the present invention and be positioned at waterproof case 1 front end, the outside surface of next-door neighbour's waterproof case 1; Hall element 5 is welded on circuit substrate, is vertically placed on the inside surface of waterproof case 1 of abutting contact wheel shaft 4, with the axes normal contacting wheel shaft 4.
Shown in composition graphs 3, the structure contacting wheel shaft in the present invention comprises contact wheel shaft plastic body 13, contact wheel shaft rubber surface coating 14, bar magnet 15; Contact wheel shaft rubber surface coating 14 is sprayed at the surface of contact wheel shaft plastic body 13 diameter major part, and friction force when measuring in order to increase between contact wheel shaft and testee, to promote distance accuracy; Bar magnet 15 is embedded in the side of contact wheel shaft plastic body 13, and the axis with the motion solderless wrapped connection wheel trolley axle of contact wheel shaft moves in a circle.
Shown in composition graphs 4, wear and tear at contact wheel shaft 4 of the present invention, or after described bar magnet 15 magnetic weakens, firmly can extract old contact wheel shaft 4 from C shape button 16, and firmly in C shape button 16, push new contact wheel shaft 4.
Composition graphs 1, shown in Fig. 3, when needs carry out measurement of length to object, press and gather button 3, gather button 3 internal circuit to connect, a high level signal is inputted to described microprocessor 8 by wire, control microprocessor 8 by wire to described range-measuring circuit, digital quantity single axis gyroscope 9 power supply, electric current is had to pass through in Hall element 5, liquid crystal digital display panel 2 starts to show numerical value, the inclination angle that distance-measurement pen waterproof case 1 pressed by digital quantity single axis gyroscope 9 generates digital pulse signal with the sampling rate of 128 times per second, by described digit pulse by wire input microprocessor 8, along with contact wheel shaft 4 is at testee surface scrolls, the bar magnet 15 being fixed on contact wheel shaft 4 side moves in a circle with the axis of motion solderless wrapped connection wheel trolley axle 4 of contact wheel shaft 4, described bar magnet 15 is made to be mechanical periodicity apart from the distance of Hall element 5, cause the Hull voltage between Hall element 5 liang of output pins to change apart from the distance change of Hall element 5 by described bar magnet 15, obtain one group of Hall voltage difference signal thus, by described Hall voltage difference signal by wire input signal amplifier 6, amplified described Hall voltage difference signal by signal amplifier 6, generate the simulating signal of standard, the variation range of described standard analog signal voltage is 3.3V ~ 5V, by described simulating signal by wire input analog-to-digital converter 7, generate digital pulse signal by described simulating signal, by described digital pulse signal by wire input microprocessor 8, by microprocessor 8 in conjunction with digital quantity single axis gyroscope 9, analog to digital converter 7 by wire the data that input go out distance-measurement pen by formulae discovery and contact the actual displacement of wheel shaft 4 on testee surface, and by wire, result of calculation is outputted to digital display panel driver 10, digital display panel driver 10 shows respective distance numerical value by polygon control survey liquid crystal digital display panel 2, at the end of range finding, unclamp and gather button 3, gather button 3 internal circuit to disconnect, a low level signal is inputted to described microprocessor 8 by wire, microprocessor 8 stops calculating, and stopping counting by polygon control survey digital display panel driver 10, digital display panel driver 10 keeps numerical value to show by polygon control survey liquid crystal digital display panel 2, after 15s, microprocessor 8 stops powering to described range-measuring circuit, digital quantity single axis gyroscope 9, and stop powering to liquid crystal digital display panel 2 by polygon control survey digital display panel driver 10, liquid crystal digital display panel 2 extinguishes, distance-measurement pen enters dormant state, to reduce the consumption of battery 11, the object reach energy-conserving and environment-protective, increasing the service life.
The foregoing describe ultimate principle of the present invention and principal character and advantage, the undeclared part related in the present invention is same as the prior art or adopt prior art to be realized.The technician more than describing the industry can understand.The present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all will fall in the claimed scope of the invention.
Claims (5)
1. (1) an electromagnetic induction waterproof distance-measurement pen, comprise waterproof case, and (3) described waterproof case (1) upper surface is inlaid with collection button, and (11) lower surface is fixed with back splint, is inside provided with battery (10); It is characterized in that, described distance-measurement pen also comprise be arranged at waterproof case (1) front end contact wheel shaft (4), be embedded in waterproof case (1) upper surface liquid crystal digital display panel (2), and be fixed on waterproof case (1) in Hall element (5), signal amplifier (6), analog to digital converter (7), microprocessor (8), digital quantity single axis gyroscope (9), digital display panel driver (10); Battery (11) with digital display panel driver (10), (8) microprocessor be electrically connected, to microprocessor (8), (10) digital display panel driver power; (6) (5) Hall element be electrically connected with signal amplifier; (6) (7) analog to digital converter be electrically connected with described signal amplifier; Described analog to digital converter (7), gather button (3), (8) (9) digital quantity single axis gyroscope be electrically connected with microprocessor respectively, and form described microprocessor input signal (8) together; (8) (10) digital display panel driver be electrically connected with described microprocessor, receives the output signal of microprocessor; (10) (2) liquid crystal digital display panel be electrically connected with described digital display panel driver.
2., according to the electromagnetic induction waterproof distance-measurement pen described in claim 1, it is characterized in that, described contact wheel shaft (4) comprise solid plastic main body (13), rubber surface coating (14) and one be embedded in described contact wheel shaft (4) side bar magnet (15).
3., according to the electromagnetic induction waterproof distance-measurement pen described in claim 1, it is characterized in that, described contact wheel shaft (4) with waterproof case (1) by be positioned at waterproof case (1) the C shape of leading exterior surface detain and be (16) connected.
4. according to the electromagnetic induction waterproof distance-measurement pen described in claim 1, it is characterized in that, utilize Hall element Hall effect (5), along with contact wheel shaft is (4) at testee surface scrolls, (15) the bar magnet being fixed on contact wheel shaft (4) side moves in a circle with contact wheel shaft rotation solderless wrapped connection wheel trolley axle axis (4) (4), make described bar magnet be (15) mechanical periodicity apart from Hall element air line distance (5), cause described Hall element (5) magnetic field intensity around by described bar magnet (15) apart from Hall element (5) distance change and rule changes; Due to Hall effect, the Hull voltage of described Hall element (5) between two output pins and the magnetic field intensity linear correlation around it, (8) draw testee length by the change calculations of described Hull voltage by microprocessor.
5. according to the electromagnetic induction waterproof distance-measurement pen described in claim 1, it is characterized in that, utilize digital quantity single axis gyroscope (9) to measure the variable quantity at the (1) solderless wrapped connection wheel trolley axle (4) pitch angle of axis of waterproof case described in use procedure, (8) compensated the error that change caused of length due to waterproof case described angle of inclination (1) of measured testee by microprocessor by the variable quantity at waterproof case (1) described pitch angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510062973.2A CN104596408A (en) | 2014-12-19 | 2015-02-08 | Automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014208093137 | 2014-12-19 | ||
| CN201420809313 | 2014-12-19 | ||
| CN201510062973.2A CN104596408A (en) | 2014-12-19 | 2015-02-08 | Automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104596408A true CN104596408A (en) | 2015-05-06 |
Family
ID=53122353
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520085521.1U Expired - Fee Related CN204359265U (en) | 2014-12-19 | 2015-02-08 | Automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen |
| CN201510062973.2A Pending CN104596408A (en) | 2014-12-19 | 2015-02-08 | Automatic dip angle compensated contact electromagnetic induction waterproof distance measuring pen |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520085521.1U Expired - Fee Related CN204359265U (en) | 2014-12-19 | 2015-02-08 | Automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN204359265U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949823A (en) * | 2017-04-20 | 2017-07-14 | 王振兴 | The hand-held wheeled type distance measuring apparatus of high accuracy |
| CN106949911A (en) * | 2017-03-24 | 2017-07-14 | 王振兴 | Hand-held wheeled type distance measuring apparatus |
| WO2018171108A1 (en) * | 2017-03-24 | 2018-09-27 | 王振兴 | Handheld wheel-type distance-measuring instrument |
| CN110018482A (en) * | 2018-01-09 | 2019-07-16 | 天津职业技术师范大学 | A kind of pen type rangefinder |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204359265U (en) * | 2014-12-19 | 2015-05-27 | 何远薇 | Automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen |
| CN108444395A (en) * | 2018-05-16 | 2018-08-24 | 中国地质大学（武汉） | A kind of Portable measuring pen |
| TWI724725B (en) * | 2019-12-31 | 2021-04-11 | 禾瑞亞科技股份有限公司 | Method and electronic device for detecting whether a component is under conductive liquid and central processing unit module thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2140048Y (en) * | 1992-06-30 | 1993-08-11 | 张琦 | Real distance digital measuring pen for map |
| US5560119A (en) * | 1994-12-07 | 1996-10-01 | Lebreton Guy C | Opto-mechanical instrument to accurately measure linear distances on flat or curved surfaces with incrementing |
| CN101285674A (en) * | 2007-04-10 | 2008-10-15 | 宁波蓝达实业有限公司 | Wheeled type distance measuring apparatus |
| CN102506683A (en) * | 2011-09-29 | 2012-06-20 | 林忠仁 | Measuring wheel used for measuring distance and area and measuring method thereof |
| CN103542809A (en) * | 2013-09-29 | 2014-01-29 | 吴更生 | Portable intelligent map ranging pen |
| CN204359265U (en) * | 2014-12-19 | 2015-05-27 | 何远薇 | Automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen |
-
2015
- 2015-02-08 CN CN201520085521.1U patent/CN204359265U/en not_active Expired - Fee Related
- 2015-02-08 CN CN201510062973.2A patent/CN104596408A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2140048Y (en) * | 1992-06-30 | 1993-08-11 | 张琦 | Real distance digital measuring pen for map |
| US5560119A (en) * | 1994-12-07 | 1996-10-01 | Lebreton Guy C | Opto-mechanical instrument to accurately measure linear distances on flat or curved surfaces with incrementing |
| CN101285674A (en) * | 2007-04-10 | 2008-10-15 | 宁波蓝达实业有限公司 | Wheeled type distance measuring apparatus |
| CN102506683A (en) * | 2011-09-29 | 2012-06-20 | 林忠仁 | Measuring wheel used for measuring distance and area and measuring method thereof |
| CN103542809A (en) * | 2013-09-29 | 2014-01-29 | 吴更生 | Portable intelligent map ranging pen |
| CN204359265U (en) * | 2014-12-19 | 2015-05-27 | 何远薇 | Automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949911A (en) * | 2017-03-24 | 2017-07-14 | 王振兴 | Hand-held wheeled type distance measuring apparatus |
| WO2018171108A1 (en) * | 2017-03-24 | 2018-09-27 | 王振兴 | Handheld wheel-type distance-measuring instrument |
| CN106949823A (en) * | 2017-04-20 | 2017-07-14 | 王振兴 | The hand-held wheeled type distance measuring apparatus of high accuracy |
| CN110018482A (en) * | 2018-01-09 | 2019-07-16 | 天津职业技术师范大学 | A kind of pen type rangefinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204359265U (en) | 2015-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204359265U (en) | Automatic pitch compensates contact electromagnetic induction waterproof distance-measurement pen | |
| CN103322920B (en) | A kind of measuring method of expansion of laser light displacement sensor measurement range | |
| CN204064233U (en) | A kind of rotation angle measurement instrument and electronic equipment | |
| CN202149756U (en) | Length or angle measuring device and circuit structure thereof | |
| CN202582494U (en) | A roller type range finder | |
| CN103542809A (en) | Portable intelligent map ranging pen | |
| CN220339513U (en) | Pen-type miniature laser power meter | |
| CN203530824U (en) | Portable pavement smoothness laser detector with three-meter straight rule | |
| CN208860294U (en) | A kind of handheld-type intelligent curved surface ruler | |
| CN102331230B (en) | Length or angle measuring device and circuit structure thereof | |
| CN104487919A (en) | Location tracking system using ultrasonic waves capable of adjusting distance between ultrasonic sensors | |
| CN115541926A (en) | Self-powered current meter applied to ocean flow field flow velocity measurement | |
| CN103808244A (en) | Magnetic encoder for position measurement | |
| CN202885771U (en) | Magnetostrictive self-calibration distance meter | |
| CN210512919U (en) | Distance measuring device | |
| CN207231584U (en) | A kind of liquid level sensor for carrying fixing device | |
| CN110018482A (en) | A kind of pen type rangefinder | |
| CN204788336U (en) | Portable roughness concentration appearance | |
| CN206696220U (en) | Easy-to-use type high accuracy high range conductance salinity measurement equipment | |
| CN103278658A (en) | High-power motor rotation speed detection device | |
| CN206113989U (en) | Novel formula range finding is worn to hand device | |
| CN220289644U (en) | Electrician's table of digital demonstration of LED LCD light pole | |
| CN104833978B (en) | A kind of terminal of rotating laser angle ranging | |
| CN103307942A (en) | Self-zero-finding ruler | |
| CN204313797U (en) | Roller rangefinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |