CN112697107A - Low-power consumption tilt sensor based on NB-IOT thing networking - Google Patents
Low-power consumption tilt sensor based on NB-IOT thing networking Download PDFInfo
- Publication number
- CN112697107A CN112697107A CN202011565114.2A CN202011565114A CN112697107A CN 112697107 A CN112697107 A CN 112697107A CN 202011565114 A CN202011565114 A CN 202011565114A CN 112697107 A CN112697107 A CN 112697107A
- Authority
- CN
- China
- Prior art keywords
- pressure
- module
- power consumption
- sensor
- iot
- 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.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Automation & Control Theory (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a low-power consumption tilt sensor based on an NB-IOT (network B-internet of things), which relates to the technical field of sensors and comprises a shell and a mounting plate, wherein the shell and the mounting plate are fastened and clamped with a measured piece 15 through bolts, an electric storage module, a charging module, a control module, a sensor measuring module and a communication module are respectively arranged in the shell, an acceleration sensor for measuring tilt angle change is arranged in the sensor measuring module, a plane plate parallel to an XY plane of acceleration sensing is fixed below the inner part of the shell, a plurality of pressure-sensitive sensing blocks which are uniformly distributed are fixed below the plane plate, the pressure-sensitive sensing blocks are symmetrically distributed in the X and Y directions of the acceleration sensing, and a mandril is connected below each pressure-sensitive sensing block through a spring. The tilt angle sensor can be used for a long time in various environments, is convenient to install, keeps high-precision measurement, is particularly outdoor, and can be widely applied to the fields of bridges, unmanned planes, ships and the like.
Description
Technical Field
The invention belongs to the field of sensors, and particularly relates to a low-power consumption tilt sensor based on an NB-IOT (network B-Internet of things).
Background
The inclination angle sensor based on the acceleration principle is the direction of the digital development of the current inclination angle testing instrument. The tilt angle sensor is common in daily life of people, relates to a plurality of application occasions, and can be applied to the fields of buildings, roads, automobiles, bridges, petroleum, coal mines, geological exploration and the like.
Generally, in order to improve the measurement accuracy of the tilt sensor, the sensor mounting surface is kept parallel to the measured target surface during mounting, and the influence of dynamic and acceleration on the sensor is reduced. For products with the range less than or equal to 60 degrees, the products are horizontally installed, X, Y direction indicating stickers are marked on the front surface of the sensor, and the marks can be referred to during installation. According to physical mechanics, when the object has an angle with the reference plane, the ratio of the acceleration in the motion direction to the gravity acceleration is different from the angle alpha between the acceleration and the gravity acceleration when there is no angle, the gravity acceleration has a component acting in the Ax direction according to the force decomposition, and Ax = gsn alpha, so that the inclination angle alpha = sin-1 (Ax/g). However, when the object makes a motion with variable acceleration in the reference plane direction, Ax is also a variable value, so that an accurate determination can be made because the static acceleration and the dynamic acceleration of the object cannot be distinguished. Therefore, before the installation of the tilt sensor, you need to determine the installation position and what angle you need to measure with respect to which plane, as long as the sensor is fixed on a certain plane.
However, in general, the tilt sensor is based on an ideal horizontal plane in order to be suitable for the public at the time of shipment. However, the plane used by people during installation is not necessarily an ideal plane, if the inclination angle sensor is only placed on a platform during installation, an angle output is generally generated at the moment, and the plane is not a horizontal plane, so that the desktop needs to be adjusted by people at this moment, people also suggest that a base for fixing the inclination angle sensor is an adjustable plane, an installation plane needs to be machined before installation, the machining precision also affects the measurement precision, besides the situation that the installation surface of the sensor is parallel to the surface of an object to be measured, the sensing line needs to be kept parallel to the axis of the surface to be measured, namely, the two axes cannot form an included angle.
The sensor of the wired communication mode has large working power, needs to have very long transmission lines and power supplies, and has higher manual maintenance cost, for example, the wired tilt sensor can not be used in the field without power supply using conditions, thereby bringing inconvenience and problems to customers.
Therefore, under the background, the low-power consumption tilt angle sensor based on the NB-IOT can be used in various environments for a long time, is convenient to install, keeps high-precision measurement, is particularly outdoor, and can be widely applied to the fields of bridges, unmanned aerial vehicles, ships and the like.
Disclosure of Invention
The invention aims to: the low-power consumption tilt sensor based on the NB-IOT is provided for solving the problems that in the prior art, navigation is easy, the accuracy is low, harvesting omission is easy to generate due to the influence of factors such as tire wear degree and terrain conditions.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-power consumption tilt sensor based on an NB-IOT (network B-input/output) Internet of things comprises a shell and a mounting plate, wherein the shell and the mounting plate clamp a tested piece 15 through bolts in a fastening manner, a power storage module, a charging module, a control module, a sensor measuring module and a communication module are respectively arranged in the shell, an acceleration sensor for measuring the change of a tilt angle is arranged in the sensor measuring module, a plane plate parallel to an XY plane of acceleration sensing is fixed below the inner part of the shell, a plurality of pressure-sensitive sensing blocks which are uniformly distributed are fixed below the plane plate and are symmetrically distributed in the X and Y directions of the acceleration sensing, a push rod is connected below each pressure-sensitive sensing block through a spring, the spring is limited in a sliding groove formed in the shell, the sliding groove is formed below the plane plate, and the push rod is in sliding fit with the sliding groove, the control module measures the pressure change of the pressure-sensitive sensing blocks to compare the equal pressure quantity, and when the pressures detected by a plurality of groups of four pressure-sensitive sensing blocks which are symmetrical to each other in the X, Y direction are the same, the heights of the corresponding ejector rods are the same, and the reference surface is determined to be parallel to the detected surface.
Preferably, the power storage module is a rechargeable battery, and the charging module is a solar panel or a USB charging module.
Preferably, the communication module comprises a low power consumption NB-IoT module and an antenna, and transmits the measured angle data to a terminal display.
Preferably, the pressure sensitive sensing block is a pressure sensor.
Preferably, the pressure sensitive sensing block is a piezoresistor.
Preferably, the mounting plate is a flexible member.
Preferably, a cover is arranged on the shell and is in sealing connection with the shell, and buffer cotton is filled in the cover.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the low-power consumption NB-IoT module can reduce the energy consumption of signal transmission during the measurement of the tilt sensor, so that the long-time measurement can be realized, and when the tilt sensor is used outdoors, the charging module adopts the solar panel to be used for a long time, so that the unnecessary maintenance cost is reduced, therefore, the tilt sensor can be used for a long time under various environments, is convenient to install, keeps high-precision measurement, is particularly outdoor, and can be widely applied to the fields of bridges, unmanned aerial vehicles, ships and the like.
2. According to the invention, the ejector rod can compress the spring to enter the chute after being subjected to external pressure, the shell and the mounting plate are fastened and clamped with the tested piece 15 through the bolt, meanwhile, under the action of the ejector rod on the spring, the stability of the integral fixation of the sensor is improved, the looseness is not easy to occur, meanwhile, the damage to the acceleration sensor caused by vibration, impact and the like can be avoided, the shell is provided with the cover, and the cover is filled with the buffer cotton, so that the impact resistance of the sensor is further improved, and the acceleration sensor is prevented from being damaged by overtravel;
3. in the invention, the ejector rod corresponding to the installation position is pressurized by the convex point on the measured surface until the ejector rod completely enters the chute, namely the pressure measured by any one or more pressure sensors reaches a threshold value, at the moment, the corresponding ejector rod completely enters the chute, the control module sends a signal prompt to adjust the tightness of the bolt so as to adjust the plane of the installation plate, when the pressures detected by a plurality of groups of four pressure sensors which are mutually symmetrical in the X, Y direction are the same, the symmetrical point determines a reference surface, the pressures detected by the pressure sensors are the same, and the heights of the corresponding ejector rods are the same, so that the reference surface is determined to be parallel to the measured surface, the sensing line is ensured to be parallel to the axis of the measured surface, the installation precision is improved, the unnecessary workload is reduced, and the measured surface does not need to be processed so as to avoid damaging the measured piece 15;
4. in the invention, for the installation of the round shaft or the round pipe and other special-shaped surfaces, the measuring surface does not need to be processed, the installation is convenient, and the application range is wide.
Drawings
FIG. 1 is an exploded view of an assembly of a low power consumption tilt sensor based on an NB-IOT Internet of things according to the present invention;
FIG. 2 is a schematic view of a mounting plate structure of a low-power consumption tilt sensor based on an NB-IOT Internet of things;
FIG. 3 is a schematic cross-sectional view of a low-power consumption tilt sensor based on an NB-IOT Internet of things according to the present invention;
FIG. 4 is a schematic cross-sectional structure diagram of a plane board of a low-power tilt sensor based on an NB-IOT Internet of things according to the present invention;
FIG. 5 is an installation diagram of embodiment 2 of the present invention;
FIG. 6 is an installation diagram of embodiment 3 of the present invention;
fig. 7 is a voltage operational amplification comparison circuit diagram according to embodiment 4 of the present invention.
Illustration of the drawings:
1. a housing; 2. an electric storage module; 3. a charging module; 4. a control module; 5. a sensor measurement module; 6. a communication module; 7. a flat plate; 8. a pressure sensitive sensing block; 9. a spring; 10. a top rod; 11. a chute; 12. mounting a plate; 13. a cover; 14. and (4) a mounting piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a low-power consumption tilt sensor based on NB-IOT internet of things comprises a housing 1, a power storage module 2, a charging module 3, a control module 4, a sensor measurement module 5 and a communication module 6 are respectively arranged in the housing 1, the power storage module 2 is a rechargeable storage battery, the charging module 3 is a solar panel or a USB charging module, the charging module 3 is isolated from other electrical elements by a shielding layer 14, an acceleration sensor for measuring tilt angle changes is arranged in the sensor measurement module 5, the communication module 6 comprises a low-power consumption NB-IOT module and an antenna, the communication module 6 transmits tilt angle data measured by the tilt sensor to a terminal display, a plane plate 7 parallel to an XY plane of the acceleration sensor is fixed below the housing 1, a push rod 10 is connected below the plane plate 7 by a spring 9, the spring 9 is limited in a chute 11 formed in the housing 1 below the plane plate 7, ejector pin 10 and 11 sliding fit of spout, thereby ejector pin 10 can compression spring 9 get into in the spout 11 after receiving ambient pressure, 1 below of casing is provided with mounting panel 12, casing 1 passes through bolt-up centre gripping quilt piece 15 with mounting panel 12, simultaneously under ejector pin 10 in the effect of spring 11, improve sensor monolithic stationary's stability, it is difficult not hard up, simultaneously can avoid the vibration, the damage to acceleration sensor such as impact, be provided with lid 13 on the casing 1, the fixed solar charging panel or the USB interface that charges of module 3 that charges in the lid 13 outside, lid 13 intussuseption is filled with the buffering cotton, the shock resistance of sensor has further been improved, avoid overtravel damage acceleration sensor.
The low-power consumption NB-IoT module has the advantages of low power consumption, wide coverage, low cost, high capacity, high stability and the like, so that the energy consumption of signal transmission during measurement of the tilt sensor can be reduced, long-time measurement can be realized, when the charging module 3 is used outdoors, the charging module can be used for a long time by adopting the solar panel, and unnecessary maintenance cost is reduced, so that the tilt sensor disclosed by the invention can be used for a long time in various environments, is convenient to install, keeps high-precision measurement, is particularly outdoor, and can be widely applied to the fields of bridges, unmanned aerial vehicles, ships and the like.
Example 2
As shown in fig. 2-3, on the basis of embodiment 1, in order to further improve the mounting accuracy, so that the sensing line is parallel to the axis of the surface to be measured, a plurality of pressure-sensitive sensing blocks 8 are fixed below the planar plate 7 and are uniformly distributed, and the pressure-sensitive sensing blocks 8 are symmetrically distributed in the X and Y directions of acceleration sensing, a push rod 10 is connected below each pressure-sensitive sensing block 8 through a spring 9, the spring 9 is limited in a chute 11 formed in the housing 1 below the planar plate 7, the push rod 10 is in sliding fit with the chute 11, so that the push rod 10 can compress the spring 9 into the chute 11 after receiving external pressure, the pressure-sensitive sensing blocks 8 are pressure sensors, the pressure sensors are symmetrically distributed in the X and Y directions of acceleration sensing, and a push rod 10 is connected below each pressure sensor through the spring 9.
As shown in fig. 4, the reason that generally affects the parallelism between the sensing line and the axis of the measured surface is that the measured surface has a convex point, so that the bottom surface of the tilt sensor can not be sufficiently contacted with the measured surface, and thus the parallelism between the sensing line and the axis of the measured surface can not be determined, and the measurement accuracy is affected, which is also the reason why the measured surface is to be processed into a plane, when the tilt sensor of the present invention is installed, the measured surface does not need to be processed, specifically, the housing 1 is fixed on the installation member by passing a bolt through the installation plate 12, when the installation surface has a convex point, the control module 4 collects pressure values measured by each pressure sensor for comparison and analysis, when the convex point on the measured surface applies pressure to the push rod 10 corresponding to the installation position until the push rod 10 completely enters the chute 11, that is, the pressure measured by any one or more pressure sensors reaches a threshold value, when the, control module 4 signals the suggestion, adjusting bolt's elasticity, make mounting panel 12 carry out the plane adjustment, it is the same with the pressure that X, Y direction four pressure sensor of mutual symmetry detected to work as the multiunit, a reference surface is confirmed to the symmetric point this moment, pressure that pressure sensor detected the detection is the same, it is the same to correspond the height of ejector pin 10, thereby confirm that the reference surface is parallel with the face of being surveyed, and then guaranteed that sensing line is parallel with the face axis of being surveyed, the precision of installation has been improved, unnecessary work load has been reduced, also need not to process the face of being surveyed, in order to avoid damaging by survey 15.
Example 3
Referring to fig. 6, on the basis of embodiment 2, when the installation component is a circular shaft or a circular pipe, it is usually difficult to install, and it is not easy to determine the X, Y direction of the circular shaft, and for the circular shaft or the circular pipe, it only needs to ensure that the pressures detected by a plurality of sets of four pressure sensors symmetrical to each other in the X, Y direction are the same, that is, it is determined that the sensing line is parallel to the axis, the installation plate 12 is a flexible member, during installation, the installation plate 12 is adjusted according to the measuring direction of the circular shaft or the circular pipe, after installation is completed, the installation plate 12 embraces the circular shaft or the circular pipe, and the push rods 10 press the circular shaft or the circular pipe with the arc of the circular shaft or the circular pipe symmetrically distributed, so that the tilt angle sensor of the present invention is firmly fixed on the circular shaft or the circular pipe, compared with the conventional tilt angle sensor, the problem of the circular shaft being difficult to install is fundamentally solved, and for other special-shaped surfaces, also can be installed according, the application range is wide.
Example 4
Referring to fig. 7, the voltage-sensitive sensing block 8 of embodiments 2 and 3 can also be replaced by voltage-sensitive resistors, all the voltage-sensitive resistors are connected in series to measure the resistance of each voltage-sensitive resistor respectively, and after being processed by an operational amplifier, the voltage of each voltage-sensitive resistor can be accurately compared and analyzed by comparing through a voltage comparator, because the resistance value of the voltage-sensitive resistor and the pressure are in a linear relationship, and the larger the pressure is, the smaller the resistance value is, and further the smaller the voltage at the two ends of the voltage-sensitive resistor is, the analysis of the contact state of each ejector rod 10 and the measured surface can be further realized, the error is smaller, and the installation accuracy is further improved.
Claims (7)
1. A low-power consumption tilt sensor based on an NB-IOT (NB-IOT) internet of things comprises a shell (1) and a mounting plate (12), wherein the shell (1) and the mounting plate (12) clamp a measured part (15) through bolts, and is characterized in that the shell (1) is internally provided with an electric storage module (2), a charging module (3), a control module (4), a sensor measuring module (5) and a communication module (6) respectively, an acceleration sensor for measuring tilt angle change is arranged in the sensor measuring module (5), a plane plate (7) parallel to an XY plane of acceleration sensing is fixed below the inner part of the shell (1), a plurality of pressure-sensitive sensing blocks (8) which are uniformly distributed are fixed below the plane plate (7), the pressure-sensitive sensing blocks (8) are symmetrically distributed in the X and Y directions of the acceleration sensing, and ejector rods (10) are connected below each pressure-sensitive sensing block (8) through springs (9), the spring (9) is limited in a sliding groove (11) formed in the shell (1), the sliding groove (11) is formed in the lower portion of the plane plate (7), the ejector rods (10) are in sliding fit with the sliding groove (11), the control module (4) measures pressure changes of the pressure-sensitive sensing blocks (8) to perform equal-pressure quantity comparison, when the pressure detected by the four pressure-sensitive sensing blocks (8) which are symmetrical to each other in the X, Y direction is the same, the corresponding ejector rods (10) are the same in height degree, and the reference surface is determined to be parallel to the detected surface.
2. The NB-IOT based low power consumption tilt sensor according to claim 1, wherein the power storage module (2) is a rechargeable battery and the charging module (3) is a solar panel or a USB charging module.
3. The NB-IOT based low power consumption tilt sensor according to claim 1, wherein the communication module (6) comprises a low power consumption NB-IoT module and an antenna, and the communication module (6) transmits the measured angle data to a terminal display.
4. The NB-IOT based tilt sensor with low power consumption as claimed in claim 1, wherein the pressure sensitive sensing block (9) is a pressure sensor.
5. The NB-IOT based low power consumption tilt sensor according to claim 1, wherein the voltage sensitive sensing block (8) is a voltage sensitive resistor.
6. The NB-IOT based low power consumption tilt sensor of claim 1, wherein the mounting plate (12) is a flexible member.
7. The NB-IOT (Internet of things) -based low-power consumption tilt sensor according to claim 1, wherein the housing (1) is provided with a cover (13), the cover is hermetically connected with the housing (1), and the cover (13) is filled with buffer cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565114.2A CN112697107A (en) | 2021-02-04 | 2021-02-04 | Low-power consumption tilt sensor based on NB-IOT thing networking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565114.2A CN112697107A (en) | 2021-02-04 | 2021-02-04 | Low-power consumption tilt sensor based on NB-IOT thing networking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112697107A true CN112697107A (en) | 2021-04-23 |
Family
ID=75510677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011565114.2A Withdrawn CN112697107A (en) | 2021-02-04 | 2021-02-04 | Low-power consumption tilt sensor based on NB-IOT thing networking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112697107A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605281A (en) * | 2021-08-11 | 2021-11-05 | 深圳市瑞芬科技有限公司 | Intelligent parking place ground lock with license plate recognition function |
| CN115183822A (en) * | 2022-09-13 | 2022-10-14 | 深圳市瑞芬科技有限公司 | Internet of things sensor for monitoring geological settlement and vibration characteristics and control method |
| US11846507B2 (en) | 2019-01-25 | 2023-12-19 | Stanley Black & Decker Inc. | Laser level system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201945307U (en) * | 2010-12-23 | 2011-08-24 | 肖利 | Gradiometer |
| CN206944986U (en) * | 2017-07-05 | 2018-01-30 | 王文青 | A kind of construction of the highway pavement planometer |
| CN210268625U (en) * | 2019-09-05 | 2020-04-07 | 苏州固鑫建筑技术有限公司 | Ground level detection device |
| CN210922588U (en) * | 2019-12-19 | 2020-07-03 | 长春北联科技有限公司 | Portable tilt angle sensor |
| CN212211397U (en) * | 2020-04-30 | 2020-12-22 | 建岩(上海)信息科技有限公司 | Wireless transmission tilt angle sensor capable of being intelligently restarted in power-off process based on LoraNB-IOT |
-
2021
- 2021-02-04 CN CN202011565114.2A patent/CN112697107A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201945307U (en) * | 2010-12-23 | 2011-08-24 | 肖利 | Gradiometer |
| CN206944986U (en) * | 2017-07-05 | 2018-01-30 | 王文青 | A kind of construction of the highway pavement planometer |
| CN210268625U (en) * | 2019-09-05 | 2020-04-07 | 苏州固鑫建筑技术有限公司 | Ground level detection device |
| CN210922588U (en) * | 2019-12-19 | 2020-07-03 | 长春北联科技有限公司 | Portable tilt angle sensor |
| CN212211397U (en) * | 2020-04-30 | 2020-12-22 | 建岩(上海)信息科技有限公司 | Wireless transmission tilt angle sensor capable of being intelligently restarted in power-off process based on LoraNB-IOT |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11846507B2 (en) | 2019-01-25 | 2023-12-19 | Stanley Black & Decker Inc. | Laser level system |
| CN113605281A (en) * | 2021-08-11 | 2021-11-05 | 深圳市瑞芬科技有限公司 | Intelligent parking place ground lock with license plate recognition function |
| CN115183822A (en) * | 2022-09-13 | 2022-10-14 | 深圳市瑞芬科技有限公司 | Internet of things sensor for monitoring geological settlement and vibration characteristics and control method |
| CN115183822B (en) * | 2022-09-13 | 2023-02-17 | 深圳市瑞芬科技有限公司 | Internet of things sensor for monitoring geological settlement and vibration characteristics and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112697107A (en) | Low-power consumption tilt sensor based on NB-IOT thing networking | |
| CN101524818B (en) | Piezoelectric-type four-dimensional cutting force-measuring platform | |
| CN202562431U (en) | Micrometric displacement measurement device | |
| CN204422041U (en) | A kind of dynamic piezoelectric formula quartz transducer weight-measuring device | |
| DE3666294D1 (en) | Piezoresistive force-measuring element and its use in determining the forces acting upon a construction | |
| KR102525812B1 (en) | force measuring device | |
| US20110127091A1 (en) | Planar Beam Load Cell Assembly | |
| US20070056183A1 (en) | Digital measuring instrument | |
| CN201000322Y (en) | Diameter detection device of flexible material | |
| CN108593962B (en) | Cantilever contact type self-powered electrostatic acceleration sensor | |
| US4825069A (en) | Relative movement sensor | |
| CN210666065U (en) | Calibration device of seismic intensity instrument | |
| US3506857A (en) | Compressive mode piezoelectric transducer with isolation of mounting base strains from the signal producing means thereof | |
| CN106092498B (en) | A kind of five component piezoelectric types " double balances " | |
| CN109781335B (en) | Self-generating pressure sensor based on electrochemical principle and preparation method thereof | |
| CN108267118B (en) | Strain type intelligent inclinometer | |
| CN113639954B (en) | Model inclination angle measuring device suitable for 1-meter-scale high-speed wind tunnel test | |
| CN111780900B (en) | Strain force transducer | |
| CN211504379U (en) | Weighing apparatus calibrating device | |
| CN111157091B (en) | Weighing apparatus calibrating device and weighing apparatus calibrating method | |
| CN103419165A (en) | High-precision torque wrench and checkout, installation and detection method thereof | |
| CN203405203U (en) | High-accuracy double-shaft inclination angle measuring device | |
| CN201104213Y (en) | High-precision deformation displacement measurer | |
| CN203084008U (en) | Anti-interference quartz flexible acceleration sensor | |
| CN219495432U (en) | Weighing device with protect function |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210423 |