CN212007395U - Measuring device for water level detection of hydraulic engineering - Google Patents
Measuring device for water level detection of hydraulic engineering Download PDFInfo
- Publication number
- CN212007395U CN212007395U CN202020776314.1U CN202020776314U CN212007395U CN 212007395 U CN212007395 U CN 212007395U CN 202020776314 U CN202020776314 U CN 202020776314U CN 212007395 U CN212007395 U CN 212007395U
- Authority
- CN
- China
- Prior art keywords
- water level
- measuring
- measuring device
- processing unit
- central processing
- 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
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A measuring device for detecting water level in hydraulic engineering relates to the field of hydraulic engineering detection. For solving current water level measuring device, the staff need stand to the marginal operation measuring device of river bank, leads to appearing dangerous when measuring, because can't learn whether the bottom of measuring the rope contacts with the riverbed, the staff carries out the reading not accurate to the scale on the measuring rope, leads to the lower problem of measuring result accuracy. The horizontal position of the motor is adjusted through the first air cylinder, and the vertical height of the supporting seat is adjusted through the second air cylinder, so that the situation that workers do not work on the edge of a river bank is realized, and dangers are avoided; the motor is started and stopped by the pressure value measured by the pressure sensor, the water level sensor is used for measuring the depth of the water level and transmitting the measured water level to the display screen through the central processing unit, the scale on the measuring rope is read, and the number displayed in the display screen is added, so that the accuracy of the numerical value is improved. The utility model is suitable for a detection to water level among the hydraulic engineering.
Description
Technical Field
The utility model relates to a hydraulic engineering detection area, concretely relates to hydraulic engineering detects measuring device of water level.
Background
The water level is the important index that hydraulic engineering detected, the height of water level need detect and time water storage and waterproof, at the measuring in-process, it is more common to use water level measurement device, current water level measurement device has some drawbacks, need the manual work to put the rope during measurement, it is comparatively hard to make technical staff's measurement, simultaneously staff need stand the marginal operation measuring device of river bank when measuring, lead to appearing danger easily when measuring, current measuring rope mark has the scale, and when measuring, because water pressure and strong wind cause measuring rope can't become the vertical state with underwater riverbed, and because can't learn measuring rope's bottom and riverbed contact, the personnel carry out the reading to the scale on measuring the rope not accurate, it is lower to lead to the measuring result accuracy.
In summary, the current water level measuring device, staff need stand to the marginal operation measuring device of river bank when measuring, lead to appearing danger easily when measuring, and current measuring rope marks the scale to because can't learn whether the bottom of measuring the rope contacts with the riverbed, because of staff carries out the reading to the scale on the measuring rope and appears the error, lead to the lower problem of measuring result accuracy again.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve current water level measuring device, the staff need stand the marginal operation measuring device of river bank when measuring, lead to appearing danger easily when measuring, present measuring rope marks has the scale to because can't learn the bottom of measuring the rope and whether contact with the riverbed, carry out the reading because of the staff to the scale on the measuring rope again and appear the error, lead to the lower problem of measuring result accuracy, and provide the measuring device based on a hydraulic engineering detects the water level.
The utility model discloses a measuring device for detecting water level in hydraulic engineering, which comprises a first cylinder, a slide block, a motor, a shaft coupling, a transmission shaft, a first support plate, a second support plate, a winding cylinder, a support seat, a second cylinder, a triangular support frame, a measuring rope, a water level sensor, a counterweight component, a display screen, a central processing unit and a pressure sensor;
the center of the upper surface of the triangular support frame is provided with a second air cylinder, one end of the upper surface of the triangular support frame is provided with a central processing unit, the output end of the second air cylinder is fixedly connected with the center of the lower surface of the support seat, one end of the upper surface of the support seat is provided with a square groove, the interior of the groove is provided with a first air cylinder, the upper surface of the support seat is provided with two slide rails, the two slide rails are symmetrically arranged in parallel, one end of the lower surface of the slide block is connected with one slide rail in a sliding way, the other end of the lower surface of the slide block is connected with the other slide rail in a sliding way, the upper surface of the slide block is provided with a motor, the other end of the upper surface of the support seat is uniformly provided with a first support plate and a second support plate along the axial direction, the middle, the winding drum is fixedly connected with one end of the winding drum, a measuring rope is wound on the outer side face of the circumference of the winding drum, a counterweight component is arranged at the bottom end of the measuring rope, a pressure sensor is arranged on the bottom surface of the counterweight component, n water level sensors are arranged on the measuring rope, n is a positive integer, and a display screen is embedded in the side face of the other end of the supporting seat;
furthermore, the counterweight assembly comprises a placing rod, a counterweight frame and m counterweight blocks, wherein m is a positive integer; two placing rods are uniformly arranged on the bottom surface inside the balance weight frame, and each balance weight block is fixed inside the balance weight frame through the placing rods;
furthermore, the number m of the balancing weights is not less than 1 and not more than 5, the weights of the balancing weights are different, and the weights of the balancing weights are 1kg, 2kg, 4kg, 6kg or 8 kg;
furthermore, the pressure signal output end of the pressure sensor is connected with the pressure signal input end of the central processing unit, the output end of the driving signal of the central processing unit is connected with the motor, the liquid level signal output end of the water level sensor is connected with the liquid level signal input end of the central processing unit, and the digital display signal of the central processing unit is connected with the display screen;
furthermore, the number n, 12 is more than or equal to n and less than or equal to 20 of the water level sensors;
furthermore, a scale value is arranged between every two water level sensors on the measuring rope;
furthermore, the scale value ranges from 0m to 0.5 m;
further, the stroke of the first air cylinder is 0.2-1.5 m;
furthermore, the central processing unit adopts a Simatic S7-200 SMART type central processing unit;
further, when the device is used, the device is placed in an operation area, aiming at the operation environment, the horizontal position of the motor is adjusted through the first air cylinder, the vertical height of the supporting seat is adjusted through the second air cylinder, the counterweight component is debugged for pools or dams with different volumes, a worker puts the counterweight block into the counterweight frame and throws the counterweight component into water, when the pressure sensor cannot detect a pressure signal, the central processing unit sends out a driving signal to enable the motor to rotate, the motor drives the transmission shaft to rotate, the transmission shaft drives the winding cylinder to rotate, the measuring rope is put into the water, when the counterweight component reaches the surface of a river bed, the pressure sensor detects a pressure signal and transmits the pressure signal to the central processing unit, the central processing unit transmits a braking signal to the motor, the motor stops rotating, the water level sensor on the measuring rope detects a liquid level signal and transmits the liquid level signal to the central processing unit after the counterweight component stops rotating for about 1 minute, the central processing unit transmits the measured water level interval value to the display screen, and the staff reads the scales on the measuring rope and adds the number displayed in the display screen, so that the accurate value of the measuring operation is obtained.
Compared with the prior art, the utility model following beneficial effect has:
one, the utility model overcomes prior art's shortcoming, through a cylinder accommodate motor's horizontal position, the vertical height of No. two cylinder adjustment supporting seats of rethread realizes that the staff does not carry out the operation at the edge of river bank, avoids dangerous emergence.
Two, the utility model overcomes prior art's shortcoming, the bottom surface that adopts the counter weight component is equipped with pressure sensor, and when counter weight component reachd the riverbed surface, pressure sensor surveyed pressure signal to with pressure signal transmission to central processing unit, central processing unit with brake signal transmission to the motor on, motor stall, the back about 1 minute is static, measure, the bottom that realizes measuring the rope can be accurate with the riverbed contact, improve measuring precision.
Three, the utility model discloses a be equipped with a plurality of level sensor on the measuring rope, utilize level sensor to measure the degree of depth of water level, level sensor records liquid level signal and transmits central processing unit, and central processing unit transmits the water level interval value that records to the display screen, and the staff carries out the reading to the scale on the measuring rope again to including the digit that shows in the display screen, be exactly this time the accurate numerical value of measurement operation, improve the degree of accuracy of numerical value.
Drawings
Fig. 1 is a front view of a measuring device for detecting water level in hydraulic engineering according to the present invention;
3 fig. 3 2 3 is 3 an 3 enlarged 3 view 3 of 3 a 3- 3 a 3 in 3 the 3 measuring 3 device 3 for 3 detecting 3 water 3 level 3 in 3 hydraulic 3 engineering 3 of 3 the 3 present 3 invention 3. 3
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 and 2, and the measuring device for detecting the water level in the hydraulic engineering in the embodiment comprises a first air cylinder 1, a sliding block 2, a motor 3, a coupler 4, a transmission shaft 5, a first supporting plate 6, a second supporting plate 7, a winding drum 8, a supporting seat 9, a second air cylinder 10, a triangular supporting frame 11, a measuring rope 12, a water level sensor 13, a counterweight component, a display screen 17, a central processing unit 18 and a pressure sensor 19;
the center of the upper surface of the triangular support frame 11 is provided with a second air cylinder 10, one end of the upper surface of the triangular support frame 11 is provided with a central processing unit 18, the output end of the second air cylinder 10 is fixedly connected with the center of the lower surface of the support seat 9, one end of the upper surface of the support seat 9 is provided with a square groove, a first air cylinder 1 is arranged in the groove, the upper surface of the support seat 9 is provided with two slide rails which are symmetrically arranged in parallel, one end of the lower surface of the slide block 2 is slidably connected with one slide rail, the other end of the lower surface of the slide block 2 is slidably connected with the other slide rail, the upper surface of the slide block 2 is provided with a motor 3, the other end of the upper surface of the support seat 9 is uniformly provided with a first support plate 6 and a second support plate 7 along the axial direction, the middle parts of the side surfaces, the other end of the transmission shaft 5 sequentially penetrates through the first supporting plate 6 and the second supporting plate 7 and is fixedly connected with one end of the winding barrel 8, the winding barrel 8 is wound with a measuring rope 12 along the circumferential outer side face, the bottom end of the measuring rope 12 is provided with a balance weight assembly, the bottom surface of the balance weight assembly is provided with a pressure sensor 19, the measuring rope 12 is provided with n water level sensors 13, n is a positive integer, and the side face of the other end of the supporting seat 9 is embedded with a display screen 17;
in the embodiment, when the device is used, the device is placed in an operation area, aiming at the operation environment, the horizontal position of the motor 3 is adjusted through the first air cylinder 1, the vertical height of the supporting seat 9 is adjusted through the second air cylinder 10, the counterweight component is debugged for pools or dams with different volumes, a worker puts the counterweight block 16 into the counterweight frame 15 and throws the counterweight component into water, when the pressure sensor 19 cannot detect a pressure signal, the central processing unit 18 sends out a driving signal to enable the motor 3 to rotate, the motor 3 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the winding drum 8 to rotate and puts the measuring rope 12 into water, when the counterweight component reaches the surface of a river bed, the pressure sensor 19 detects a pressure signal and transmits the pressure signal to the central processing unit 18, the central processing unit 18 transmits a braking signal to the motor 3, the motor 3 stops rotating, and is about 1 minute static, and the level sensor 13 on the measuring rope 12 measures the liquid level signal and transmits to central processing unit 18, and central processing unit 18 transmits the water level interval value that measures to display screen 17, and personnel are carrying out the reading to the scale on the measuring rope 12 to the digit that shows in the display screen 17 in addition, be exactly this time the accurate numerical value of measurement operation.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 and 2, and the embodiment is a further limitation of the measuring device according to the first embodiment, and the measuring device for detecting water level in hydraulic engineering according to the embodiment includes a placing rod 14, a counterweight frame 15 and m counterweight blocks, where m is a positive integer; two placing rods 14 are uniformly arranged on the bottom surface of the interior of the counterweight frame 15, and each counterweight block is fixed in the counterweight frame 15 through the placing rods 14;
this embodiment adopts to be equipped with the balancing weight in the counter weight frame 15, to different volumetric ponds or dykes and dams, debugs the counter weight subassembly, heightens the commonality.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, and is a further limitation to the measuring device of the second embodiment, in the measuring device for detecting water level in hydraulic engineering of the embodiment, the number m, 1 ≦ m ≦ 5 of the balancing weights 16, the weight of each balancing weight 16 is different, and the weight of each balancing weight 16 is 1kg, 2kg, 4kg, 6kg or 8 kg;
in the embodiment, the number m of the balancing weights 16 is adopted, wherein m is more than or equal to 1 and less than or equal to 5, the mass of each balancing weight 16 is different, and the mass of each balancing weight 16 is 1kg, 2kg, 4kg, 6kg or 8 kg; through two or a plurality of balancing weights 16 combination, can modulate different weight, realized measuring different volumetric ponds or dykes and dams, improve the commonality.
The fourth concrete implementation mode: the present embodiment is described with reference to fig. 1 and fig. 2, and is a further limitation of the measuring device according to the first embodiment, in the measuring device for detecting water level in hydraulic engineering according to the present embodiment, the pressure signal output terminal of the pressure sensor 19 is connected to the pressure signal input terminal of the central processing unit 18, the output terminal of the driving signal of the central processing unit 18 is connected to the motor 3, the liquid level signal output terminal of the water level sensor 13 is connected to the liquid level signal input terminal of the central processing unit 18, and the digital display signal of the central processing unit 18 is connected to the display screen 17;
in the specific embodiment, the pressure sensor is arranged on the bottom surface of the counterweight component, when the counterweight component reaches the surface of the river bed, the pressure sensor measures a pressure signal and transmits the pressure signal to the central processing unit, the central processing unit transmits a braking signal to the motor, the motor stops rotating and stands for about 1 minute, and then the measurement is carried out, so that the bottom end of the measuring rope can be accurately contacted with the river bed, and the measurement precision is improved; and utilize level sensor to measure the degree of depth of water level, level sensor measures liquid level signal and transmits to central processing unit, and central processing unit transmits the water level interval value that measures to the display screen, and personnel are carrying out the reading to the scale on measuring the rope to add the digit that shows in display screen 17, be the accurate numerical value of this time measurement operation, improve the degree of accuracy of numerical value.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 and 2, and the embodiment is a further limitation of the measuring device according to the first embodiment, and the number n, 12 ≦ n ≦ 20 of the water level sensors 13 of the measuring device for detecting the water level in the hydraulic engineering according to the embodiment;
in the specific embodiment, a plurality of water level sensors 13 are adopted, the water level value corresponding to each water level sensor 13 is different, and the water level values of the water level sensors 13 of the measuring rope 12 from bottom to top are 1m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m, 10m, 11m and 12m in sequence.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1 and 2, and the embodiment is a further limitation of the measuring device according to the fifth embodiment, in the measuring device for detecting water level in hydraulic engineering according to the embodiment, a scale value is provided between every two water level sensors 13 on the measuring rope 12;
this embodiment, the staff is reading the scale on the measuring rope after the measurement to the number that shows in addition display screen 17 is the accurate numerical value of this time of measurement operation, improves the degree of accuracy of numerical value.
The seventh embodiment: the present embodiment will be described with reference to fig. 1 and 2, and the present embodiment is a further limitation of the measuring apparatus according to the sixth embodiment, and the measuring apparatus for detecting a water level in hydraulic engineering according to the present embodiment has a scale value ranging from 0m to 0.5 m.
The specific implementation mode is eight: the embodiment is described with reference to fig. 1 and 2, and the embodiment is a further limitation of the measuring device according to the first embodiment, and the measuring device for detecting the water level in the hydraulic engineering according to the embodiment has a stroke of the first cylinder 1 of 0.2m to 1.5 m;
according to the specific embodiment, the stroke of the first air cylinder 1 is 0.2-1.5 m, so that a worker can stand 3m away from the shore to operate the device, and the phenomenon that the worker falls into water is avoided.
The specific implementation method nine: the present embodiment is described with reference to fig. 1 and 2, and is a further limitation of the measuring device according to the second embodiment, and the central processing unit 18 of the measuring device for detecting water level in hydraulic engineering according to the present embodiment is a SIMATIC S7-200 SMART type central processing unit.
Principle of operation
When the device is used, the device is placed in an operation area, aiming at the operation environment, the horizontal position of the motor 3 is adjusted through the first air cylinder 1, the vertical height of the supporting seat 9 is adjusted through the second air cylinder 10, the counterweight component is debugged for pools or dams with different volumes, a worker puts the counterweight block 16 into the counterweight frame 15 and throws the counterweight component into water, when the pressure sensor 19 cannot detect a pressure signal, the central processing unit 18 sends out a driving signal to enable the motor 3 to rotate, the motor 3 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the winding drum 8 to rotate and puts the measuring rope 12 into water, when the counterweight component reaches the surface of a river bed, the pressure sensor 19 detects the pressure signal and transmits the pressure signal to the central processing unit 18, the central processing unit 18 transmits a braking signal to the motor 3, and the motor 3 stops rotating, the static state is about 1 minute, the water level sensor 13 on the measuring rope 12 measures the liquid level signal and transmits the liquid level signal to the central processing unit 18, the central processing unit 18 transmits the measured water level interval value to the display screen 17, the staff reads the scales on the measuring rope 12 and adds the number displayed in the display screen 17, and the accurate value of the measuring operation is the accurate value.
Claims (8)
1. The utility model provides a measuring device of hydraulic engineering detection water level which characterized in that: the device comprises a first cylinder (1), a sliding block (2), a motor (3), a coupler (4), a transmission shaft (5), a first supporting plate (6), a second supporting plate (7), a winding drum (8), a supporting seat (9), a second cylinder (10), a triangular supporting frame (11), a measuring rope (12), a water level sensor (13), a counterweight component, a display screen (17), a central processing unit (18) and a pressure sensor (19);
a second air cylinder (10) is arranged in the center of the upper surface of the triangular support frame (11), a central processing unit (18) is arranged at one end of the upper surface of the triangular support frame (11), the output end of the second air cylinder (10) is fixedly connected with the center of the lower surface of the support seat (9), a square groove is arranged at one end of the upper surface of the support seat (9), a first air cylinder (1) is arranged in the groove, two slide rails are arranged on the upper surface of the support seat (9) and symmetrically and parallelly, one end of the lower surface of the sliding block (2) is slidably connected with one slide rail, the other end of the lower surface of the sliding block (2) is slidably connected with the other slide rail, a motor (3) is arranged on the upper surface of the sliding block (2), a first support plate (6) and a second support plate (7) are uniformly arranged at the other end of the upper surface of the support seat (9) along the axial, the output of motor (3) passes through the one end fixed connection of shaft coupling (4) and transmission shaft (5), the other end of transmission shaft (5) passes backup pad (6) and No. two backup pads (7) in proper order, with the one end fixed connection of a winding section of thick bamboo (8), winding section of thick bamboo (8) have twined measuring rope (12) along the circumference outside face, the bottom of measuring rope (12) is equipped with the counter weight subassembly, the bottom surface of counter weight subassembly is equipped with pressure sensor (19), be equipped with n level sensor (13) on measuring rope (12), n is the positive integer, display screen (17) have been inlayed to the other end side of supporting seat (9).
2. The water conservancy project detection water level measuring device of claim 1, characterized in that: the counterweight assembly comprises a placing rod (14), a counterweight frame (15) and m counterweight blocks (16), wherein m is a positive integer; two placing rods (14) are uniformly arranged on the bottom surface of the interior of the counterweight frame (15), and each counterweight block (16) penetrates through the placing rods (14) and is fixed inside the counterweight frame (15).
3. The water conservancy project detection water level measuring device of claim 2, characterized in that: the number of the balancing weights (16) is more than or equal to 1 and less than or equal to 5, and the weight of each balancing weight (16) is 1kg, 2kg, 4kg, 6kg or 8 kg.
4. The water conservancy project detection water level measuring device of claim 1, characterized in that: the pressure signal output end of the pressure sensor (19) is connected with the pressure signal input end of the central processing unit (18), the output end of a driving signal of the central processing unit (18) is connected with the motor (3), the liquid level signal output end of the water level sensor (13) is connected with the liquid level signal input end of the central processing unit (18), and a digital display signal of the central processing unit (18) is connected with the display screen (17).
5. The water conservancy project detection water level measuring device of claim 1, characterized in that: the number n, 12 is more than or equal to n and less than or equal to 20 of the water level sensors (13).
6. The water conservancy project detection water level measuring device of claim 1, characterized in that: and a scale value is arranged between every two water level sensors (13) on the measuring rope (12).
7. The water conservancy project detection water level measuring device of claim 6, characterized in that: the scale value ranges from 0m to 0.5 m.
8. The water conservancy project detection water level measuring device of claim 1, characterized in that: the stroke of the first cylinder (1) is 0.2-1.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020776314.1U CN212007395U (en) | 2020-05-12 | 2020-05-12 | Measuring device for water level detection of hydraulic engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020776314.1U CN212007395U (en) | 2020-05-12 | 2020-05-12 | Measuring device for water level detection of hydraulic engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212007395U true CN212007395U (en) | 2020-11-24 |
Family
ID=73411015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020776314.1U Active CN212007395U (en) | 2020-05-12 | 2020-05-12 | Measuring device for water level detection of hydraulic engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212007395U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183749A (en) * | 2022-07-06 | 2022-10-14 | 烟台市城市水源工程运行维护中心 | Measuring device for hydraulic engineering management |
-
2020
- 2020-05-12 CN CN202020776314.1U patent/CN212007395U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183749A (en) * | 2022-07-06 | 2022-10-14 | 烟台市城市水源工程运行维护中心 | Measuring device for hydraulic engineering management |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212007395U (en) | Measuring device for water level detection of hydraulic engineering | |
| CN203443732U (en) | Lever and dead weight compound force standard machine | |
| CN107063048A (en) | The method that piston group portion's size detection is detected with cubing and using the cubing | |
| CN108051054A (en) | It is a kind of in hospital can intelligent measure height and weight measuring instrument | |
| CN109870269A (en) | A kind of three-dimensional force plate/platform calibration method | |
| CN110243430A (en) | A kind of groundwater level monitoring device | |
| CN107014479A (en) | Steam turbine monitor protection instrument vibrates the dynamic check method of class measuring loop | |
| CN210071074U (en) | Equipment for testing sensitivity of movement of dry water meter | |
| CN204789332U (en) | Novel water transparency measuring apparatu | |
| CN208187455U (en) | A kind of acquisition digitized signal distribution transformer | |
| CN213897069U (en) | Foundation settlement detector | |
| CN101839750A (en) | Numerically controlled water level | |
| CN201348502Y (en) | Three-dimensional homogeneous entity digitalization measuring apparatus | |
| CN108593009A (en) | A kind of measuring device of deformation joint or the three direction displacement in crack and newborn crack identification | |
| CN110186538B (en) | River test water level meter and parameter calibration method thereof | |
| CN219266293U (en) | Concrete shrinkage test device | |
| CN203216575U (en) | Automatic detection device using water meter measuring characteristics of visual device | |
| CN208666825U (en) | A kind of elevator hydraulic draft gear resetting time detection fixture and detector | |
| CN201083752Y (en) | Portable overrunning governor speed-measuring equipment | |
| CN106525205A (en) | Equipment for automatically testing performance technology of water meters | |
| CN106197550A (en) | Integrate measurement apparatus and the measuring method of calibrator, densimeter and level-sensing device | |
| CN108956373B (en) | Automatic density measuring device and method | |
| CN205672509U (en) | Chin-up attainment test instrument | |
| CN2605281Y (en) | Apparatus for detecting dial triangle position for knitting loom | |
| CN110412251A (en) | A kind of cement paste shrinkage character test measurement method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Yan Inventor after: Du Yingxin Inventor after: Xu Jia Inventor after: Wang Chunqiang Inventor after: Lv Hui Inventor after: Tian Lidong Inventor before: Du Yingxin Inventor before: Xu Jia Inventor before: Wang Chunqiang Inventor before: Lv Hui Inventor before: Tian Lidong |