CN111240183B - Testing device for satellite synchronous clock - Google Patents
Testing device for satellite synchronous clock Download PDFInfo
- Publication number
- CN111240183B CN111240183B CN202010186650.5A CN202010186650A CN111240183B CN 111240183 B CN111240183 B CN 111240183B CN 202010186650 A CN202010186650 A CN 202010186650A CN 111240183 B CN111240183 B CN 111240183B
- Authority
- CN
- China
- Prior art keywords
- main control
- testing
- synchronous clock
- display panel
- fixing
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
- G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
- G04D7/002—Electrical measuring and testing apparatus
- G04D7/003—Electrical measuring and testing apparatus for electric or electronic clocks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses a testing device of a satellite synchronous clock, which comprises a testing body arranged on a digital display panel, wherein the testing body comprises: the photoelectric display panel comprises a plurality of photoelectric sensors and a fixing assembly for mounting the photoelectric sensors, the photoelectric sensors are opposite to the digital display panel and used for sending pulse signals to the main control assembly when digital time jumps, and the main control assembly processes the received pulse signals and standard pulse signals to output time interval errors. By using the device, the satellite synchronous clock is not required to be changed and set, and the device is only placed on the digital display panel, so that the problem of measurement and calibration of the satellite synchronous clock is effectively solved, the precision is high, the device is convenient for measurement departments to use, and the device has universality.
Description
Technical Field
The invention relates to the field of satellite synchronous clock calibration devices, in particular to a testing device for a satellite synchronous clock.
Background
With the development of the technology, more and more occasions such as high-speed rail stations, hospital construction and the like need accurate time display at present. Satellite synchronous clocks are widely used due to their high accuracy. The time displayed by the clock is the standard of work and production of people and is also an important evidence in law, and a metering department is required to carry out verification regularly.
The traditional detection method is a visual detection method, and the digital code jumping moment is observed to be compared with the standard time; because vision is easy to be tired, the measurement precision is low, and errors caused by human factors are large. In addition, a method for performing post analysis by adopting a high-speed camera is adopted, so that the subsequent processing is complicated, and test data cannot be obtained on site.
Disclosure of Invention
In view of the above, a first objective of the present invention is to provide a testing apparatus for a satellite synchronous clock, so as to solve the problems that the existing satellite synchronous clock verification needs manual detection, the measurement accuracy is low, and the error is large.
In order to achieve the first object, the invention provides the following technical scheme:
the utility model provides a testing arrangement of satellite synchronization clock, is including locating the test body on the digital display panel, the test body includes:
the photoelectric display panel comprises a plurality of photoelectric sensors and a fixing assembly for installing the photoelectric sensors, wherein the photoelectric sensors are opposite to the digital display panel and used for sending pulse signals to the main control assembly when digital time jumps, and the main control assembly processes the received pulse signals and standard pulse signals to output time interval errors.
Preferably, the fixing assembly comprises fixing pieces which are respectively arranged in one-to-one correspondence with the photoelectric sensors, and probe mounting holes through which photoelectric probes of the photoelectric sensors penetrate are formed in the fixing pieces.
Preferably, the number of the fixing pieces is multiple, sliding holes are formed in two ends of any one of the fixing pieces respectively, the sliding holes are formed in the length direction of the fixing pieces, and the adjacent fixing pieces are detachably and fixedly connected through the sliding holes and the bolt assemblies.
Preferably, the number of the fixing pieces is four, any one of the fixing pieces is provided with the photoelectric sensors corresponding to the fixing pieces one by one, and the four fixing pieces are sequentially connected end to end.
Preferably, the number of the fixing pieces is five, any one of the fixing pieces is provided with the photoelectric sensors corresponding to the fixing pieces one to one, the four fixing pieces are sequentially connected end to form a parallelogram frame, and the other two ends of the fixing piece are arranged at the middle points of the two long edges of the parallelogram frame.
Preferably, the main control assembly is arranged on the measuring body, and the main control assembly is connected with the photoelectric sensor through a communication line.
Preferably, the main control assembly includes a main control chip and a time interval measuring unit connected thereto, and the time interval measuring unit compares the standard pulse signal with a pulse signal sent by the main control chip to output the time interval error.
Preferably, the main control assembly further includes a battery assembly for respectively connecting with the main control chip, the time interval measuring unit and the photoelectric sensor.
Preferably, any one of the fixing pieces is further provided with a sucker mounting hole for mounting a sucker, and the test body is detachably and fixedly connected with the digital display panel through the sucker.
Preferably, the fixing member is a plastic strip/acrylic strip/metal strip.
The invention provides a testing device of a satellite synchronous clock, which comprises a testing body arranged on a digital display panel, wherein the testing body comprises: the photoelectric display panel comprises a plurality of photoelectric sensors and a fixing assembly for mounting the photoelectric sensors, the photoelectric sensors are opposite to the digital display panel and used for sending pulse signals to the main control assembly when digital time jumps, and the main control assembly processes the received pulse signals and standard pulse signals to output time interval errors.
The testing device for the satellite synchronous clock is characterized in that the testing body is arranged on the digital display panel and is arranged opposite to the digital display panel through the photoelectric sensor, when digital time jumps, a pulse signal is sent to the main control assembly, and the main control assembly processes the received pulse signal and a standard pulse signal to output a time interval error. The device does not need to change and set the satellite synchronous clock, and only the device is placed on the digital display panel, so that the problem of inaccurate satellite synchronous clock is effectively solved, the cost is low, the device is convenient to set, the precision is high, and the device has universality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an installation structure of a testing apparatus for a satellite synchronous clock according to an embodiment of the present invention;
fig. 2 is a schematic top view of a testing apparatus for a satellite synchronous clock according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a chuck according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fixing element according to an embodiment of the present invention.
The drawings are numbered as follows:
the device comprises a fixing piece 1, a sucker mounting hole 2, a photoelectric sensor 3, a nixie tube 4, a bolt 5, a sucker 6, a probe mounting hole 7 and a sliding hole 8.
Detailed Description
The embodiment of the invention discloses a testing device for a satellite synchronous clock, which aims to solve the problems that the conventional satellite synchronous clock verification needs manual detection, the measurement precision is low, the error is large and the like.
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.
Referring to fig. 1 to 4, fig. 1 is a schematic view illustrating an installation structure of a testing apparatus for a satellite synchronous clock according to an embodiment of the present invention; fig. 2 is a schematic top view of a testing apparatus for a satellite synchronous clock according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a chuck according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a fixing element according to an embodiment of the present invention.
In a specific embodiment, the testing apparatus for a satellite synchronous clock provided by the present invention includes a testing body disposed on a digital display panel, the testing body includes:
the photoelectric sensors 3 and the fixing component are used for installing the photoelectric sensors 3, the photoelectric sensors 3 are opposite to the digital display panel and send pulse signals to the main control component when digital time jumps, and the main control component processes the received pulse signals and standard pulse signals to output time interval errors.
During the use, place the test body on digital display panel, accessible overlap joint or the mode of bonding is fixed, perhaps through the mode of joint, if set up the overlap joint on the test body, the other end of overlap joint is placed on digital display panel, can realize the two of digital display panel under vertical state's fixing from this, in other embodiments, also can set up as required, as long as can guarantee that photoelectric sensor 3 sets up with digital display panel is relative, it can to detect digital display panel's digital beat, do not restrict test body and digital display panel's concrete fixed mode.
By applying the testing device of the satellite synchronous clock, provided by the invention, the testing body is arranged on the digital display panel and is arranged opposite to the digital display panel through the photoelectric sensor 3, when digital time jumps, a pulse signal is sent to the main control assembly, and the main control assembly processes the received pulse signal and a standard pulse signal to output a time interval error. The device does not need to change and set the satellite synchronous clock, and only the device is placed on the digital display panel, so that the problem of testing and calibrating the satellite synchronous clock is effectively solved, the precision is high, the device is convenient to set, and the device has universality.
In one embodiment, the fixing assembly includes fixing members 1 respectively corresponding to the photoelectric sensors 3, and the fixing members 1 are provided with probe mounting holes 7 through which photoelectric probes of the photoelectric sensors 3 pass. The number of mounting 1 is four and more than four, preferably sets up to seven in order to respectively with each charactron 4 relative setting, mounting 1 preferably sets up to the fixed strip, detachable fixed connection is in order to splice into the parallelogram frame relative with charactron 4 between each fixed strip, preferably rectangular frame, sets up as required. The fixing piece 1 is provided with a probe mounting hole 7, and the probe mounting hole 7 penetrates through the wall thickness of the fixing piece 1.
Further, the number of the fixing pieces 1 is multiple, the two ends of any one fixing piece 1 are respectively provided with a sliding hole 8, the sliding holes 8 are arranged along the length direction of the fixing piece 1, and the adjacent fixing pieces 1 are detachably and fixedly connected through the sliding holes 8 and the bolt 5 assemblies.
With the arrangement, the frames formed between the fixing pieces 1 can be adjusted according to the requirements of the digital display panel, the number of the fixing pieces 1 is seven, so that two rectangular frames are formed, and the length and the width of each rectangular frame are adjusted through adjustment of the sliding holes 8 between the adjacent fixing pieces 1. The sliding hole 8 is set up to the bar hole that both ends are the fillet, and bar hole aperture suits with the diameter of bolt 5 for bolt 5 can remove in the bar downthehole.
Furthermore, the number of the fixing pieces 1 is four, any one of the fixing pieces 1 is provided with the photoelectric sensors 3 corresponding to the fixing piece one by one, and the four fixing pieces 1 are sequentially connected end to end. The frame formed by the four fixing pieces 1 forms a square shape, the lengths of the fixing pieces 1 are equal, the fixing pieces are arranged at the lower part of the nixie tube 4 of the digital display panel, namely the change of the lower half part of the number is detected, in other embodiments, the fixing pieces can also be arranged into a parallelogram, and the angle and the distance of the fixing pieces are adjusted through the sliding hole 8 and the bolt 5.
In one embodiment, the number of the fixing pieces 1 is five, any one of the fixing pieces 1 is provided with the photoelectric sensors 3 corresponding to the fixing piece one by one, the four fixing pieces 1 are sequentially connected end to form a parallelogram frame, and two ends of the other fixing piece 1 are arranged at the middle points of two long edges of the parallelogram frame. In other embodiments, the number of the fixing members 1 may be five, forming a rectangular frame, two of the five fixing members 1 are used as long sides of the rectangular frame, and the other three are respectively arranged at the center and two ends of the long sides. The number and shape of the fixing members 1 are not limited as long as the same technical effects can be achieved. In other embodiments, two photosensors 3 may be disposed on one fixing member 1 according to the length of the fixing member 1, and all of them are within the protection scope of the present invention.
Any one photoelectric sensor 3 has a pulse signal, and the main control assembly outputs the pulse signal, compares the pulse signal with a standard pulse signal and outputs a time interval error.
On the basis of each embodiment, the main control assembly is arranged on the measuring body, and the main control assembly is connected with the photoelectric sensor 3 through a communication line. The master control subassembly sets up with measuring body integral type, measures the body and includes that battery, communication line etc. realize master control subassembly and photoelectric sensor 3's connection to for it provides the power, measure the body and preferably set up to closed cavity in order to install and protect master control subassembly, the preferred circuit board of master control subassembly, the battery can set up to button cell etc.. In other embodiments, the main control assembly may also be configured as an independent external device, and the main control assembly and the photoelectric sensor are connected when in use, which is within the protection scope of the present invention.
Specifically, the main control assembly comprises a main control chip and a time interval measuring unit connected with the main control chip, the time interval measuring unit is preferably set as a time interval measuring instrument, and the time interval measuring unit compares a standard pulse signal with a pulse signal sent by the main control chip to output a time interval error. The error precision of the time interval error can reach us level to meet the detection requirement. Further, the main control assembly further comprises a battery assembly for being respectively connected with the main control chip, the time interval measuring unit and the photoelectric sensor 3. The battery is preferably a button battery, and is small in size and convenient to replace.
In order to realize the installation of the test body and the digital display panel, the mounting holes 2 of the suckers 6 for mounting the suckers 6 are respectively arranged on any fixing piece 1, and the test body is detachably and fixedly connected with the digital display panel through the suckers 6. Sucking disc 6 is flexible elastic material, is the horn mouth form on one side, and the horn mouth upwards becomes gradually, and the one end of horn mouth is fixed and is equipped with the installation arch with 6 mounting hole 2 of sucking disc, realizes fixedly through 6 mounting hole 2 of sucking disc and the bellied cooperation of installation, and the horn mouth is pressed on digital display panel, because elastomer reconversion produces suction.
Wherein, the mounting is specifically plastic strip/ya keli strip/metal strip. The structure is simple and light, and the weight is light.
The size of the device can be adjusted to automatically adapt to font changes of the nixie tube 4, the device can adapt to satellite synchronous clocks of various models and sizes, the satellite synchronous clocks are fixed on a digital display panel through the suckers 6, the clocks do not need to be detached during testing, and jumping of fonts can be detected by combining the photoelectric sensors 3.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a testing arrangement of satellite synchronization clock which characterized in that, is including locating the test body on the digital display panel, the test body includes:
the photoelectric sensors are opposite to the digital display panel so as to send pulse signals to the main control assembly when digital time jumps, and the main control assembly processes the received pulse signals and standard pulse signals so as to output time interval errors; the fixing component comprises fixing pieces which are respectively arranged in one-to-one correspondence with the photoelectric sensors, and probe mounting holes through which photoelectric probes of the photoelectric sensors penetrate are arranged on the fixing pieces;
the number of the fixing pieces is four; all the fixing pieces and all the photoelectric sensors are arranged in a one-to-one correspondence manner; the four fixing pieces are connected end to end in sequence; the frame formed by the four fixing pieces forms a square shape, all the fixing pieces are equal in length and are arranged at the lower part of the nixie tube of the digital display panel.
2. The device for testing the satellite synchronous clock according to claim 1, wherein sliding holes are respectively formed at two ends of any one of the fixing members, the sliding holes are formed along the length direction of the fixing members, and adjacent fixing members are detachably and fixedly connected through the sliding holes and the bolt assemblies.
3. The device for testing the satellite synchronous clock according to claim 1 or 2, wherein the main control module is arranged on the test body, and the main control module is connected with the photoelectric sensor through a communication line.
4. The apparatus for testing a satellite synchronous clock according to claim 3, wherein the main control module comprises a main control chip and a time interval measuring unit connected thereto, and the time interval measuring unit compares the standard pulse signal with a pulse signal transmitted by the main control chip to output the time interval error.
5. The apparatus for testing a satellite synchronous clock according to claim 4, wherein the main control module further comprises a battery module for connecting to the main control chip, the time interval measurement unit and the photoelectric sensor respectively.
6. The device for testing a satellite synchronous clock according to claim 4, wherein any one of the fixing members is further provided with a suction cup mounting hole for mounting a suction cup, and the testing body is detachably and fixedly connected with the digital display panel through the suction cup.
7. The device for testing a satellite synchronous clock according to claim 1, wherein the fixing member is a plastic strip or a metal strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010186650.5A CN111240183B (en) | 2020-03-17 | 2020-03-17 | Testing device for satellite synchronous clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010186650.5A CN111240183B (en) | 2020-03-17 | 2020-03-17 | Testing device for satellite synchronous clock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111240183A CN111240183A (en) | 2020-06-05 |
| CN111240183B true CN111240183B (en) | 2022-06-17 |
Family
ID=70875255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010186650.5A Active CN111240183B (en) | 2020-03-17 | 2020-03-17 | Testing device for satellite synchronous clock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111240183B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130443B (en) * | 2020-09-29 | 2022-02-08 | 徐州市质量技术监督综合检验检测中心(徐州市标准化研究中心) | Device suitable for calibrating day difference of quartz electronic stopwatch and experimental method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569873U (en) * | 2009-12-10 | 2010-09-01 | 西安理工大学 | LED digital electronic clock |
| CN203981869U (en) * | 2014-07-01 | 2014-12-03 | 杭州电子科技大学 | Based on FlexRay bus electric energy Watch Error detection system |
| CN105068468A (en) * | 2015-07-15 | 2015-11-18 | 谢云华 | Nixie tube automatic identification system based on light induction |
| CN206741821U (en) * | 2017-06-06 | 2017-12-12 | 黄蕾 | Wi Fi network automatic correcting time digital perpetual calendars |
| CN107919934A (en) * | 2017-11-20 | 2018-04-17 | 广州谨华电子科技有限公司 | A kind of clock and clock correcting method |
| CN208477535U (en) * | 2018-07-02 | 2019-02-05 | 无锡市欧凯电子有限公司 | A kind of reading data device based on equipment charactron |
| CN109656126A (en) * | 2018-12-28 | 2019-04-19 | 武汉依迅电子信息技术有限公司 | Beidou can tame and docile time service method and device |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515592Y (en) * | 2001-12-11 | 2002-10-09 | 胡月亭 | Adjustable fixed support |
| CN2757189Y (en) * | 2004-11-08 | 2006-02-08 | 北京有色金属研究总院 | Radio remote control LED digital calendar display screen |
| CN200950215Y (en) * | 2005-09-27 | 2007-09-19 | 黄新万 | Paper tape induction type digital timer |
| CN201026223Y (en) * | 2007-01-11 | 2008-02-27 | 陈红芹 | Adjustable convenient hook for surgery operation |
| CN201668435U (en) * | 2010-06-05 | 2010-12-15 | 陈鑫 | Clamp hole type surgical retractor |
| CN201936912U (en) * | 2010-06-25 | 2011-08-17 | 绍兴光彩显示技术有限公司 | Empty encapsulation patch white light digital tube |
| CN201892836U (en) * | 2010-12-07 | 2011-07-06 | 湖南华自科技有限公司 | GPS (global position system) satellite synchronous clock |
| CN103653776A (en) * | 2013-11-07 | 2014-03-26 | 安徽省智汇电气技术有限公司 | Reading support with adjustable height and angle |
| CN104700712A (en) * | 2015-04-04 | 2015-06-10 | 长沙天穹电子科技有限公司 | Timing device capable of automatically synchronizing |
| CN204717574U (en) * | 2015-06-18 | 2015-10-21 | 苏州工业职业技术学院 | SCM Based energy-saving solar street lamp |
| CN204940126U (en) * | 2015-08-31 | 2016-01-06 | 中铁三局集团天津建设工程有限公司 | Bridge pinner anchor hole positioner |
| CN105652655A (en) * | 2016-04-01 | 2016-06-08 | 湖南述泰信息技术有限公司 | Handheld satellite time service synchronizing terminal |
| CN208125787U (en) * | 2018-05-03 | 2018-11-20 | 广东电网有限责任公司 | Adjustable electricity meter fixing support |
| CN109349951A (en) * | 2018-12-12 | 2019-02-19 | 陈鹏辉 | A kind of scalable bathroom accessories |
-
2020
- 2020-03-17 CN CN202010186650.5A patent/CN111240183B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569873U (en) * | 2009-12-10 | 2010-09-01 | 西安理工大学 | LED digital electronic clock |
| CN203981869U (en) * | 2014-07-01 | 2014-12-03 | 杭州电子科技大学 | Based on FlexRay bus electric energy Watch Error detection system |
| CN105068468A (en) * | 2015-07-15 | 2015-11-18 | 谢云华 | Nixie tube automatic identification system based on light induction |
| CN206741821U (en) * | 2017-06-06 | 2017-12-12 | 黄蕾 | Wi Fi network automatic correcting time digital perpetual calendars |
| CN107919934A (en) * | 2017-11-20 | 2018-04-17 | 广州谨华电子科技有限公司 | A kind of clock and clock correcting method |
| CN208477535U (en) * | 2018-07-02 | 2019-02-05 | 无锡市欧凯电子有限公司 | A kind of reading data device based on equipment charactron |
| CN109656126A (en) * | 2018-12-28 | 2019-04-19 | 武汉依迅电子信息技术有限公司 | Beidou can tame and docile time service method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111240183A (en) | 2020-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108827193B (en) | Detection device for accurately detecting flatness of template | |
| CN111240183B (en) | Testing device for satellite synchronous clock | |
| CN105944363A (en) | Ultrasonic pull-up tester and control method thereof | |
| CN110975268A (en) | Method and system for monitoring and evaluating standing long jump of infant | |
| CN206177288U (en) | A testing arrangement for component slant angle measuring | |
| CN207113808U (en) | A kind of cell piece angularity measuring instrument | |
| CN104236519B (en) | Three-dimensional perspective measurement apparatus | |
| CN201698024U (en) | Laser ranging device | |
| CN209524930U (en) | A kind of displacement sensor for pull rope calibrating installation | |
| CN204008621U (en) | A kind of high-precision intelligent dissolution rate instrument | |
| CN214445847U (en) | General installation mechanism applying infrared photoelectric head quick-change device | |
| CN214470799U (en) | Manage and use slope quick detection device | |
| CN202453517U (en) | Gravity acceleration gauge | |
| CN210534327U (en) | Fixing device for detecting infrared distance measuring sensor | |
| CN210198299U (en) | Novel tunnel convergence instrument | |
| CN207622660U (en) | A kind of goat contact group measuring device | |
| CN106362384A (en) | Pull-up tester and control method thereof | |
| CN207662292U (en) | Measuring tool for detecting precision of door and window frames | |
| CN201206984Y (en) | Device for measuring angle of inclination of inclined plane | |
| CN214906936U (en) | Multifunctional longitudinal jumping capability detection equipment | |
| CN211346664U (en) | Component symmetry detection device | |
| CN108627131A (en) | A kind of photovoltaic component frame detecting tool | |
| CN216559606U (en) | Stable spring stiffness coefficient measuring instrument | |
| CN212586542U (en) | Detecting instrument for constructional engineering | |
| CN208366319U (en) | A kind of novel tunnel convergence monitoring auxiliary device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |