CN110031069A - A kind of movable weighing belt and application method based on laser ranging - Google Patents
A kind of movable weighing belt and application method based on laser ranging Download PDFInfo
- Publication number
- CN110031069A CN110031069A CN201910292341.3A CN201910292341A CN110031069A CN 110031069 A CN110031069 A CN 110031069A CN 201910292341 A CN201910292341 A CN 201910292341A CN 110031069 A CN110031069 A CN 110031069A
- Authority
- CN
- China
- Prior art keywords
- belt
- ranging
- crossbeam
- laser range
- laser
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/003—Details; specially adapted accessories
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
A kind of movable weighing belt and application method based on laser ranging, weighing belt uses upper and lower two ranging crossbeams, ranging crossbeam can automatic height adjustment position, row's laser range finder is equipped on every ranging crossbeam, the Laser emission end of upper row's laser range finder is downwards, the Laser emission end of lower row's laser range finder upward, is equipped with belt speed measuring mechanism in lower ranging crossbeam, the idler wheel that tests the speed of belt speed measuring mechanism keeps being in rolling contact state in real time with belt lower surface vertically.Application method are as follows: unloaded belt is demarcated, unloaded belt section area is obtained；Set a time interval；Laser scanning is carried out to material containing belt, obtains material containing belt section area；Material area of section on material containing belt is obtained by subtraction；Calculate the volume of material that setting time interval inner belt is transmitted；Calculate the quality of material that setting time interval inner belt is transmitted；The material gross mass that the belt in set period of time is transmitted is calculated by quality summing mode.
Description
Technical field
The invention belongs to weighing belt technical fields, more particularly to a kind of movable weighing belt based on laser ranging and make
Use method.
Background technique
Weighing belt is a kind of Automatic balance for being installed on and being used for carrying out consecutive weighings to loose unpacked material on belt conveyer,
It is that the production industries such as mine, agricultural, industry are widely used to, by accurate to the capital equipment of material short-distance transport metering
Quality of material is measured, can be had great importance in terms of regulation production, calculating yield, raising.
Currently, the first is belted electronic balance, and second is controlled nucleon operated belt conveyor scale there are mainly two types of most common belt claims.
Belted electronic balance use contact type measurement mode, mainly by mechanical scale frame, velocity sensor, weighing sensor,
The composition such as display instrument is controlled, continuous dynamic measuring can be carried out to solid material.But the measurement accuracy of belted electronic balance compared with
The problems such as low, and there are equipment cost height and high failure rates.
Controlled nucleon operated belt conveyor scale uses non-contact measurement mode, can pass through difference to material bed projection gamma-rays, gamma-rays
Thickness it is material bed when, caused ray attenuation degree is different, and ray is strong by the intensity of detection recycling ray
Degree substitutes into formula relevant to material component, density, so that it may calculate material thickness.Although controlled nucleon operated belt conveyor scale overcomes electronics
The some drawbacks of weighing belt, but its gamma-rays projected can generate harm to human body, while there is also surveys for controlled nucleon operated belt conveyor scale
The problems such as accuracy of measurement is low, calibration is complicated.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of movable weighing belt based on laser ranging and use
Method has the characteristics that measurement accuracy is high, easy for assemble or unload, structure is simple, equipment cost is low.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of movable belt based on laser ranging
Scale, including pedestal, column, lifting platform, upper ranging crossbeam, lower ranging crossbeam and belt speed measuring mechanism；The column is fixedly mounted with vertically
On pedestal, it is respectively arranged with lead screw and guide rail on column, driving motor is installed in lead screw end, column, lead screw and leads
Rail is parallel to each other, and nut seat is equipped on lead screw, and the lifting platform is packed on nut seat, offers and leads on lifting platform surface
To sliding slot, the guide rail is located in guide chute, and lifting platform can move linearly along guide rail；The upper ranging crossbeam level is packed in
At the top of lifting platform, the lower ranging crossbeam level is packed in lifting platform bottom, and upper ranging crossbeam is parallel with lower ranging crossbeam, on
Channel is walked for belt in space between ranging crossbeam and lower ranging crossbeam；It is evenly equipped on several on the upper ranging crossbeam
Laser range finder, several upper laser range finders are arranged in a linear, and the Laser emission end of upper laser range finder is downwards；Institute
It states and is evenly equipped with several lower laser range finders on lower ranging crossbeam, several lower laser range finders are arranged in a linear, and lower laser ranging
The Laser emission end of instrument is vertically upward；The belt speed measuring mechanism is arranged on lower ranging crossbeam.
The sweep length of the upper laser range finder arranged in a straight line is greater than the width of belt, and arranged in a straight line is described lower sharp
The sweep length of optar is greater than the width of belt.
The belt speed measuring mechanism includes test the speed idler wheel, first connecting rod, second connecting rod, spring loop bar and pedestal；The base
Frame is packed on lower ranging crossbeam, and described first connecting rod one end is hinged at the top of pedestal, and described second connecting rod one end is hinged on base
In the middle part of frame, the first connecting rod other end and the second connecting rod other end are hinged on the wheel carrier for the idler wheel that tests the speed simultaneously, are connected by pedestal, first
Bar, second connecting rod and the idler wheel wheel carrier that tests the speed constitute parallelogram mechanism；The idler wheel that tests the speed is in rolling contact with belt lower surface
Cooperation；Spring loop bar bottom end is hinged on pedestal bottom, and spring loop bar top is hinged on second connecting rod.
The application method of the movable weighing belt based on laser ranging, includes the following steps:
Step 1: carrying out unloaded calibration, when calibration, by upper laser range finder and lower laser range finder to unloaded belt into
Row synchronous scanning obtains the area of section of unloaded belt, is denoted as Ai；
Step 2: one time interval of setting is denoted as Δ t；
Step 3: scanning is synchronized to material containing belt by upper laser range finder and lower laser range finder, obtains material containing
The area of section of belt, is denoted as Ai′；Meanwhile being measured by movement speed of the belt speed measuring mechanism to material containing belt,
And the belt movement speed measured is denoted as vi；
Step 4: pass through formula Si=Ai′-AiThe material area of section on material containing belt is calculated；In formula, SiTo carry
Expect the material area of section on belt, Ai' be material containing belt area of section, AiFor the area of section of unloaded belt；
Step 5: pass through formula Vi=Si·viThe material body that Δ t time interval inner belt is transmitted is calculated in Δ t
Product；In formula, ViThe volume of material transmitted by Δ t time interval inner belt, SiFor the material area of section on material containing belt, vi
For belt movement speed, Δ t is the time interval of setting；
Step 6: pass through formula Mi=ViThe quality of material that Δ t time interval inner belt is transmitted is calculated in ρ；Formula
In, MiThe quality of material transmitted by Δ t time interval inner belt, ViThe material body transmitted by Δ t time interval inner belt
Product, ρ is material density；
Step 7: pass through formula MAlways=∑ MiThe material gross mass that the belt being calculated in set period of time is transmitted；
In formula, MAlwaysThe material gross mass transmitted by the belt in set period of time, MiThe object transmitted by Δ t time interval inner belt
Expect quality.
Beneficial effects of the present invention:
Movable weighing belt and application method based on laser ranging of the invention has measurement accuracy height, installing and dismounting
The feature convenient, structure is simple, equipment cost is low.Due to the adjustable oneself height of ranging crossbeam, it is adapted to difference
Belt at height and position enters belt accurately between upper and lower ranging crossbeam, may not only be applied to carry out school to other weighing belts
Core measurement, it may also be used for long-term measurement.Since the invention belongs to the measurement methods of Entirely contactless formula, without to belt conveyor
It carries out any change, and is suitble to the measurement in actual production under various belts offsets and jitter conditions, and can be in belt
Conveyer does not shut down being installed in place for situation.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of movable weighing belt based on laser ranging of the invention；
Fig. 2 is the structural schematic diagram of belt speed measuring mechanism of the invention；
Fig. 3 is schematic diagram when carrying out laser ranging to material containing belt by up/down laser range finder；
In figure, 1-pedestal, 2-columns, 3-lifting platforms, 4-upper ranging crossbeams, 5-lower ranging crossbeams, the survey of 6-belts
Fast mechanism, 7-guide rails, 8-upper laser range finders, 9-lower laser range finders, 10-test the speed idler wheel, 11-first connecting rods, and 12-
Second connecting rod, 13-spring loop bars, 14-pedestals, 15-belts, 16-driving motors, 17-lead screws, 18-materials.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figures 1 to 3, a kind of movable weighing belt based on laser ranging, including pedestal 1, column 2, lifting platform 3,
Upper ranging crossbeam 4, lower ranging crossbeam 5 and belt speed measuring mechanism 6；The column 2 is packed in vertically on pedestal 1, is divided on column 2
It is not provided with lead screw and guide rail 7, driving motor 16 is installed in lead screw end, column 2, lead screw 17 and guide rail 7 are parallel to each other,
Nut seat is installed, the lifting platform 3 is packed on nut seat, offers guide chute on 3 surface of lifting platform, institute on lead screw 17
It states guide rail 7 to be located in guide chute, lifting platform 3 can move linearly along guide rail 7；Upper 4 level of ranging crossbeam is packed in lifting
3 top of platform, lower 5 level of ranging crossbeam are packed in 3 bottom of lifting platform, and upper ranging crossbeam 4 is parallel with lower ranging crossbeam 5,
Channel is walked for belt 15 in space between upper ranging crossbeam 4 and lower ranging crossbeam 5；It is uniformly distributed on the upper ranging crossbeam 4
There are several upper laser range finders 8, several upper laser range finders 8 are arranged in a linear, and the Laser emission end of upper laser range finder 8 is perpendicular
Directly downward；Several lower laser range finders 9 are evenly equipped on the lower ranging crossbeam 5, several lower laser range finders 9 are linearly arranged
Column, and the Laser emission end of lower laser range finder 9 is vertically upward；The belt speed measuring mechanism 6 is arranged on lower ranging crossbeam 5.
Lead screw rotation is driven by driving motor, moves up and down nut seat along lead screw, and then realize and adjust lifting platform 3 on column 2
The purpose of height and position, and upper ranging crossbeam 4 and the height and position of lower ranging crossbeam 5 then with lifting platform 3 realize it is synchronous
Adjustment.
The sweep length of the upper laser range finder 8 arranged in a straight line is greater than the width of belt 15, and arranged in a straight line is described
The sweep length of lower laser range finder 9 is greater than the width of belt 15.
The belt speed measuring mechanism 6 includes test the speed idler wheel 10, first connecting rod 11, second connecting rod 12, spring loop bar 13 and base
Frame 14；The pedestal 14 is packed on lower ranging crossbeam 5, and described 11 one end of first connecting rod is hinged on the top of pedestal 14, and described the
Two connecting rods, 12 one end is hinged on 14 middle part of pedestal, and 11 other end of first connecting rod and 12 other end of second connecting rod are hinged on test the speed simultaneously
On the wheel carrier of idler wheel 10, parallelogram machine is constituted by pedestal 14, first connecting rod 11, second connecting rod 12 and 10 wheel carrier of idler wheel that tests the speed
Structure；The idler wheel 10 that tests the speed is in rolling contact cooperation with 15 lower surface of belt；13 bottom end of spring loop bar is hinged on 14 bottom of pedestal
Portion, 13 top of spring loop bar are hinged on second connecting rod 12.Due to the presence of spring loop bar 13, it can effectively increase the idler wheel that tests the speed
Frictional force between 10 and 15 lower surface of belt ensure that the measurement accuracy for the idler wheel 10 that tests the speed.
In the present embodiment, the quantity of upper laser range finder 8 and lower laser range finder 9 is set as 11, and adjacent laser is surveyed
The distance between distance meter is set as 100mm, and the spacing of upper laser range finder 8 and lower laser range finder 9 is 500mm；Belt speed measuring machine
The first connecting rod 11 of structure 6 and the length of second connecting rod 12 are 200mm, and the flexible stroke of spring loop bar 13 is 60mm, Ke Yibao
It tests the speed normal measurement of the idler wheel 10 to belt 15 when demonstrate,proving the amplitude of belt 15 within the scope of 120mm；For driving lead screw to rotate
Driving motor selects 86 stepper motors, and the length of guide rail 7 is 1100mm, and the lifting travel of lifting platform 3 is 600mm, laser ranging
The highly rated range of belt be 500mm~1100mm.
In the present embodiment, it is a set of using STM32 microcontroller as the control system of core, control system to be that weighing belt has been matched
Controller communicated (upper and lower two with upper laser range finder 8, lower laser range finder 9 and the idler wheel 10 that tests the speed respectively by serial ports
Row's laser range finder is connected by way of " one master and multiple slaves " with controller, and two serial ports are only taken up), it is used for range information and speed
Spend the acquisition of information；The controller of control system controls driving motor movement by common pin, for adjusting the height of lifting platform 3
Spend position；The controller of control system is communicated by SPI with LED touch screen, and staff is by LED touch screen to belt
Scale is operated, while reading the measurement result of weighing belt in real time by LED touch screen；The controller of control system passes through serial ports
It is communicated with Ethernet interface, data upload is carried out by Ethernet interface.
The application method of the movable weighing belt based on laser ranging, includes the following steps:
Step 1: carrying out unloaded calibration, when calibration, passes through upper laser range finder 8 and 9 pairs of lower laser range finder unloaded belts
15 synchronize scanning, obtain the area of section of unloaded belt 15, are denoted as Ai；And in actual application, due to same
One belt conveyer may need to carry out long-term measurement work using weighing belt of the invention, in order to avoid using this hair every time
Unloaded calibration is all carried out before bright weighing belt, it can be by the area of section A for the unloaded belt 15 that unloaded calibration obtains for the first timei
It stores in control system, recalls the area of section A of stored unloaded belt 15 when booting automatically every timei, therefore
Primary unloaded calibration need to be only carried out for same belt conveyer；
Step 2: one time interval of setting is denoted as Δ t；
Step 3: synchronizing scanning to material containing belt 15 by upper laser range finder 8 and lower laser range finder 9, obtains
The area of section of material containing belt 15, is denoted as Ai′；Meanwhile by belt speed measuring mechanism 6 to the movement speed of material containing belt 15
It measures, and the belt movement speed measured is denoted as vi；
Step 4: pass through formula Si=Ai′-AiThe material area of section on material containing belt 15 is calculated；In formula, SiFor
Material area of section on material containing belt 15, Ai' be material containing belt 15 area of section, AiFor the area of section of unloaded belt 15；
Step 5: pass through formula Vi=Si·viThe material that Δ t time interval inner belt 15 is transmitted is calculated in Δ t
Volume；In formula, ViThe volume of material transmitted by Δ t time interval inner belt 15, SiFor the material section face on material containing belt 15
Product, viFor belt movement speed, Δ t is the time interval of setting；
Step 6: pass through formula Mi=ViThe quality of material that Δ t time interval inner belt 15 is transmitted is calculated in ρ；Formula
In, MiThe quality of material transmitted by Δ t time interval inner belt 15, ViThe material transmitted by Δ t time interval inner belt 15
Volume, ρ are material density；
Step 7: pass through formula MAlways=∑ MiThe total matter of material that the belt 15 being calculated in set period of time is transmitted
Amount；In formula, MAlwaysThe material gross mass transmitted by the belt 15 in set period of time, MiFor 15 institute of Δ t time interval inner belt
The quality of material of transmission.
The scope of patent protection that scheme in embodiment is not intended to limit the invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the patents of this case.
Claims (4)
1. a kind of movable weighing belt based on laser ranging, it is characterised in that: horizontal including pedestal, column, lifting platform, upper ranging
Beam, lower ranging crossbeam and belt speed measuring mechanism；The column is packed on pedestal vertically, be respectively arranged on column lead screw and
Guide rail is equipped with driving motor in lead screw end, and column, lead screw and guide rail are parallel to each other, and nut seat are equipped on lead screw, institute
It states lifting platform to be packed on nut seat, offers guide chute on lifting platform surface, the guide rail is located in guide chute, lifting
Platform can move linearly along guide rail；The upper ranging crossbeam level is packed at the top of lifting platform, and the lower ranging crossbeam level is fixedly mounted with
In lifting platform bottom, upper ranging crossbeam is parallel with lower ranging crossbeam, and the space between upper ranging crossbeam and lower ranging crossbeam is
Belt walks channel；Several upper laser range finders are evenly equipped on the upper ranging crossbeam, several upper laser range finders are in straight
Line arrangement, and the Laser emission end of upper laser range finder is downwards；Several lower laser are evenly equipped on the lower ranging crossbeam
Rangefinder, several lower laser range finders are arranged in a linear, and the Laser emission end of lower laser range finder is vertically upward；The belt
Velocity measurement mechanisms are arranged on lower ranging crossbeam.
2. a kind of movable weighing belt based on laser ranging according to claim 1, it is characterised in that: arranged in a straight line
The sweep length of the upper laser range finder is greater than the width of belt, the sweep length of the lower laser range finder arranged in a straight line
Greater than the width of belt.
3. a kind of movable weighing belt based on laser ranging according to claim 1, it is characterised in that: the belt is surveyed
Fast mechanism includes test the speed idler wheel, first connecting rod, second connecting rod, spring loop bar and pedestal；The pedestal is packed in lower ranging crossbeam
On, described first connecting rod one end is hinged at the top of pedestal, and described second connecting rod one end is hinged in the middle part of pedestal, and first connecting rod is another
End and the second connecting rod other end are hinged on the wheel carrier for the idler wheel that tests the speed simultaneously, by pedestal, first connecting rod, second connecting rod and rolling of testing the speed
It takes turns wheel carrier and constitutes parallelogram mechanism；The idler wheel that tests the speed is in rolling contact cooperation with belt lower surface；Spring loop bar bottom
End is hinged on pedestal bottom, and spring loop bar top is hinged on second connecting rod.
4. the application method of the movable weighing belt described in claim 1 based on laser ranging, it is characterised in that: including as follows
Step:
Step 1: carrying out unloaded calibration, when calibration, is carried out by upper laser range finder and lower laser range finder to unloaded belt same
Step scanning obtains the area of section of unloaded belt, is denoted as Ai；
Step 2: one time interval of setting is denoted as Δ t；
Step 3: scanning is synchronized to material containing belt by upper laser range finder and lower laser range finder, obtains material containing belt
Area of section, be denoted as Ai′；Meanwhile it being measured by movement speed of the belt speed measuring mechanism to material containing belt, and will
The belt movement speed measured is denoted as vi；
Step 4: pass through formula Si=Ai′-AiThe material area of section on material containing belt is calculated；In formula, SiFor material containing belt
On material area of section, Ai' be material containing belt area of section, AiFor the area of section of unloaded belt；
Step 5: pass through formula Vi=Si·viThe volume of material that Δ t time interval inner belt is transmitted is calculated in Δ t；Formula
In, ViThe volume of material transmitted by Δ t time interval inner belt, SiFor the material area of section on material containing belt, viFor belt
Movement speed, Δ t are the time interval of setting；
Step 6: pass through formula Mi=ViThe quality of material that Δ t time interval inner belt is transmitted is calculated in ρ；In formula, Mi
The quality of material transmitted by Δ t time interval inner belt, ViThe volume of material transmitted by Δ t time interval inner belt, ρ are
Material density；
Step 7: pass through formula MAlways=∑ MiThe material gross mass that the belt being calculated in set period of time is transmitted；In formula,
MAlwaysThe material gross mass transmitted by the belt in set period of time, MiThe material matter transmitted by Δ t time interval inner belt
Amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292341.3A CN110031069A (en) | 2019-04-12 | 2019-04-12 | A kind of movable weighing belt and application method based on laser ranging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292341.3A CN110031069A (en) | 2019-04-12 | 2019-04-12 | A kind of movable weighing belt and application method based on laser ranging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110031069A true CN110031069A (en) | 2019-07-19 |
Family
ID=67238231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910292341.3A Pending CN110031069A (en) | 2019-04-12 | 2019-04-12 | A kind of movable weighing belt and application method based on laser ranging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110031069A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894288A (en) * | 2022-05-07 | 2022-08-12 | 北京工业职业技术学院 | Calibration device, calibration method and electronic belt scale |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19631926A1 (en) * | 1996-08-07 | 1998-02-12 | Siemens Ag | Conveyor mass flow measuring device |
| CN102679915A (en) * | 2012-05-24 | 2012-09-19 | 河北工业大学 | Method and system for measuring volumes and weights of continuously conveyed long objects based on optical measurement |
| CN204065113U (en) * | 2014-06-20 | 2014-12-31 | 安徽马钢自动化信息技术有限公司 | A kind of anti-jump rocker arrangement for belt speed measuring sensor |
| CN104515572A (en) * | 2015-01-13 | 2015-04-15 | 中国矿业大学(北京) | Belt weigher based on laser ranging |
| CN205374325U (en) * | 2016-01-26 | 2016-07-06 | 南京林业大学 | Liftable timber surface nondestructive test device of adjusting |
| CN107727207A (en) * | 2017-09-19 | 2018-02-23 | 安凯 | A kind of optics belt conveyer scale and its measuring method |
-
2019
- 2019-04-12 CN CN201910292341.3A patent/CN110031069A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19631926A1 (en) * | 1996-08-07 | 1998-02-12 | Siemens Ag | Conveyor mass flow measuring device |
| CN102679915A (en) * | 2012-05-24 | 2012-09-19 | 河北工业大学 | Method and system for measuring volumes and weights of continuously conveyed long objects based on optical measurement |
| CN204065113U (en) * | 2014-06-20 | 2014-12-31 | 安徽马钢自动化信息技术有限公司 | A kind of anti-jump rocker arrangement for belt speed measuring sensor |
| CN104515572A (en) * | 2015-01-13 | 2015-04-15 | 中国矿业大学(北京) | Belt weigher based on laser ranging |
| CN205374325U (en) * | 2016-01-26 | 2016-07-06 | 南京林业大学 | Liftable timber surface nondestructive test device of adjusting |
| CN107727207A (en) * | 2017-09-19 | 2018-02-23 | 安凯 | A kind of optics belt conveyer scale and its measuring method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894288A (en) * | 2022-05-07 | 2022-08-12 | 北京工业职业技术学院 | Calibration device, calibration method and electronic belt scale |
| CN114894288B (en) * | 2022-05-07 | 2023-12-22 | 北京工业职业技术学院 | Calibration device, calibration method and electronic belt scale |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104359391B (en) | Detecting device for reinforced concrete protective layer measurer and floor thickness measurer | |
| CN205785084U (en) | A kind of contactless high-accuracy wafer face type measuring instrument | |
| CN106441170B (en) | Keyboard testing flatness machine | |
| CN103278225A (en) | Belt weighting device based on image technology detection | |
| CN203705021U (en) | Liquid crystal display data error detector of intelligent meter | |
| CN110031352A (en) | Rockwell apparatus Standard Machine and hardness calibration method | |
| CN110108249A (en) | It is a kind of for measuring transformer outer profile position and the measuring tool and measurement method of deformation | |
| CN202938798U (en) | Plate material property tester | |
| CN104515572A (en) | Belt weigher based on laser ranging | |
| CN104793258B (en) | Vertical gravity gradient measurement system | |
| CN110031069A (en) | A kind of movable weighing belt and application method based on laser ranging | |
| CN111735636A (en) | Dummy positioning device and dummy positioning method for automobile crash test | |
| CN208419896U (en) | A kind of surface detection apparatus | |
| CN209043524U (en) | A kind of adjustment of tubular construction part quality center of mass and detection device | |
| CN105444676B (en) | Suitable for the multi-faceted positioning device of online scanning survey probe | |
| CN209727685U (en) | Geotechnical investigation test specimen density measurement system | |
| JP2006250834A (en) | Calibration method for speed measuring instrument, and device therefor | |
| CN109507105A (en) | A kind of road antiskid Performance Test System and its test method | |
| CN109406054A (en) | A kind of adjustment of tubular construction part quality center of mass and detection device | |
| CN105403189B (en) | A kind of guide rail parallelism measuring method and device | |
| CN201348535Y (en) | Electronic scale capable of measuring volume and weight | |
| CN110370085A (en) | A kind of modified ball bar device based on laser ranging | |
| CN109855571A (en) | A kind of detection method and its device of FPD sputtering target material flatness | |
| CN110057272A (en) | A kind of railroad platform robot measurement | |
| CN207024038U (en) | A kind of eyesight detects chair special |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190719 |