CN211013057U - Detection equipment for proportional servo valve - Google Patents
Detection equipment for proportional servo valve Download PDFInfo
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- CN211013057U CN211013057U CN201921926466.9U CN201921926466U CN211013057U CN 211013057 U CN211013057 U CN 211013057U CN 201921926466 U CN201921926466 U CN 201921926466U CN 211013057 U CN211013057 U CN 211013057U
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Abstract
The utility model discloses a check out test set of proportional servo valve, including base, first fixing base, test ejector pin, amesdial supporting seat, force transducer, distance piece bearing, position calibration screw, feed screw rod, screw rod supporting seat, feed hand wheel and testing arrangement, feed hand wheel connection the one end of feed screw rod, the other end of feed screw rod passes the screw rod supporting seat and with force transducer's one end fixed connection, the measuring staff of amesdial with the position calibration screwed connection, the position calibration screw with it is fixed to feed the screw rod, force transducer's the other end with the test ejector pin is connected, testing arrangement includes the second fixing base and fixes the subassembly that awaits measuring on the second fixing base, the subassembly that awaits measuring is located one side of test ejector pin. The utility model discloses but the multiple parameter of proportional valve servo valve detects, effectively improves detection precision and detection efficiency and supporting qualification rate.
Description
Technical Field
The utility model relates to a proportion servo valve detects technical field, in particular to proportion servo valve's check out test set.
Background
The detection method generally adopted for the parameter detection of the proportional servo valve is as follows: the common measuring tool is used for testing partial parameters, and the common measuring tool is difficult to measure accurately due to the fact that the requirement on measuring accuracy is very high. And some parameters are judged completely by hand feeling, are not quantized, and the matching qualified rate is unstable, so that rework is caused. However, the matching efficiency is difficult to improve. In addition, partial module parameters lack detection means, and the difficulty of judging the module with the parameter defect problem after valve assembly is increased.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of above-mentioned prior art's weak point, the utility model aims to provide a check out test set of proportional servo valve can detect the multiple parameter of proportional servo valve, effectively improves detection precision and detection efficiency and supporting qualification rate.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a detection device of a proportional servo valve comprises a base, a first fixing seat, a test ejector rod, a dial indicator supporting seat, a force sensor, a thrust piece needle bearing, a position calibration screw, a feed screw, a screw supporting seat, a feed hand wheel and a test device, wherein the first fixing seat is fixed on the base, the dial indicator supporting seat and the screw supporting seat are both arranged on the first fixing seat, the feed hand wheel is connected with one end of the feed screw, the other end of the feed screw penetrates through the screw supporting seat and is fixedly connected with one end of the force sensor, the thrust piece needle bearing is sleeved at the position of the feed screw close to the force sensor, the dial indicator is fixed on the dial indicator supporting seat, a measuring rod of the dial indicator is connected with the position calibration screw, and the position calibration screw is fixed with the feed screw, the other end of the force sensor is connected with the test ejector rod, the test device comprises a second fixing seat and a component to be tested, the component to be tested is fixed on the second fixing seat, the second fixing seat is fixed on the base, and the component to be tested is located on one side of the test ejector rod.
Preferably, in the detection device of the proportional servo valve, the component to be detected includes a first proportional electromagnet, a first displacement sensor and a first dial indicator, the first proportional electromagnet is fixed on the second fixing seat, the first dial indicator is connected to the first displacement sensor, the first displacement sensor is further connected to a thrust output rod of the first proportional electromagnet, and the thrust output rod of the first proportional electromagnet can be pushed by the test ejector rod.
Preferably, in the detection device of the proportional servo valve, the first displacement sensor is an L VDT displacement sensor.
Preferably, the detection device of the proportional servo valve further comprises a control box, an L VDT analysis plate and a multimeter, wherein a power supply is arranged in the control box, the power supply is connected with a power line of the first proportional electromagnet, the L VDT analysis plate is connected with the first displacement sensor, and the multimeter is used for measuring the feedback voltage of the control box.
Preferably, in the detection equipment for the proportional servo valve, the component to be detected comprises a support rod, a valve body, a valve sleeve, a valve core and a second dial indicator, the valve sleeve is fixed on the support rod, the valve body is fixedly connected with the valve sleeve, the valve core is positioned in the valve sleeve and can be pushed by the test ejector rod to move in the valve sleeve, and the valve core is also connected with the second dial indicator.
Preferably, in the detection equipment of the proportional servo valve, the component to be tested comprises a spring seat, a first spring, a spring compression bar, a test mounting seat and a third dial indicator, the spring seat is fixed on the second fixing seat, the first spring and the test mounting seat are both fixed on the spring seat, the spring compression bar is installed on the test mounting seat and in sliding connection with the test mounting seat, the spring compression bar can be pushed and extruded by the test ejector rod through the first spring, and the first spring is further connected with the third dial indicator.
Preferably, in the detection equipment of the proportional servo valve, the component to be detected comprises a second spring, a second proportional electromagnet, a second displacement sensor and a fourth dial indicator, the second proportional electromagnet is fixed on the second fixing seat, the second displacement sensor is connected with a thrust output rod of the second proportional electromagnet, the second spring is fixed on the thrust output rod of the second proportional electromagnet and located between the thrust output rod of the second proportional electromagnet and the test ejector rod, the second spring can be extruded by the test ejector rod, and the second spring is further connected with the fourth dial indicator.
Preferably, in the detection device of the proportional servo valve, the second displacement sensor is an L VDT displacement sensor.
Preferably, the detection equipment for the proportional servo valve further comprises an oscilloscope, and the oscilloscope is electrically connected with the second proportional electromagnet.
Compared with the prior art, the utility model provides a check out test set of proportional servo valve, including base, first fixing base, test ejector pin, amesdial supporting seat, force transducer, distance piece bearing needle, position calibration screw, feed screw rod, screw rod supporting seat, feeding hand wheel and testing arrangement, first fixing base is fixed on the base, amesdial supporting seat and screw rod supporting seat are all installed on the first fixing base, the feed hand wheel is connected one end of feed screw rod, the other end of feed screw rod passes the screw rod supporting seat and with the one end fixed connection of force transducer, distance piece bearing sleeve dress is in the position that feed screw rod is close to force transducer, the amesdial is fixed on the amesdial supporting seat, the measuring staff of amesdial with position calibration screw connection, the position calibration screw is fixed with the feeding screw rod, the other end of the force sensor is connected with the testing ejector rod, the testing device comprises a second fixing seat and a component to be tested, the component to be tested is fixed on the second fixing seat, the second fixing seat is fixed on the base, and the component to be tested is located on one side of the testing ejector rod. The utility model discloses but the multiple parameter of proportional valve servo valve detects, effectively improves detection precision and detection efficiency and supporting qualification rate.
Drawings
Fig. 1 is a schematic structural diagram of a first preferred embodiment of a detection apparatus for a proportional servo valve according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic structural diagram of a second preferred embodiment of a detection apparatus for a proportional servo valve according to the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
fig. 5 is a schematic structural diagram of a third preferred embodiment of a detection apparatus for a proportional servo valve according to the present invention;
FIG. 6 is a cross-sectional view of C-C of FIG. 5;
fig. 7 is a schematic structural diagram of a fourth preferred embodiment of a detection apparatus for a proportional servo valve according to the present invention;
fig. 8 is a cross-sectional view of D-D in fig. 7.
Detailed Description
The utility model provides a check out test set of proportional servo valve, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted with reference to the attached drawing below the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
Referring to fig. 1 and 2, the detection apparatus for a proportional servo valve provided in this embodiment includes a base 1, a first fixing seat 2, a test ejector rod 3, a dial indicator 4, a dial indicator support seat 5, a force sensor 6, a thrust piece needle bearing 7, a position calibration screw 8, a feed screw 9, a screw support seat 10, a feed hand wheel 11 and a test device, where the first fixing seat 2 is fixed on the base 1, the dial indicator support seat 5 and the screw support seat 10 are both installed on the first fixing seat 2, the feed hand wheel 11 is connected to one end of the feed screw 9, the other end of the feed screw 9 passes through the screw support seat 10 and is fixedly connected to one end of the force sensor 6, the thrust piece needle bearing 7 is sleeved on a position of the feed screw 9 close to the force sensor 6, and the dial indicator 4 is fixed on the dial indicator support seat 5, the measuring bar of the dial indicator 4 is connected with the position calibration screw 8, the position calibration screw 8 is fixed with the feed screw 9, the other end of the force sensor 6 is connected with the test ejector rod 3, the testing device comprises a second fixing seat 12 and a component to be tested, which is fixed on the second fixing seat 12, the second fixing seat 12 is fixed on the base 1, and the component to be tested is located on one side of the test ejector rod 3.
Specifically, the base 1 is an installation base of the whole equipment, the feeding hand wheel 11 can drive the feeding screw rod 9 to move back and forth when rotating, the feeding screw rod 9 can drive the force sensor 6 fixedly connected with the feeding screw rod 9 and the testing ejector rod 3 fixedly connected with the force sensor 6 to move when moving, and the dial indicator 4 can read the moving distance of the feeding screw rod 9; the test ejector pin 3 is used for withstanding the subassembly that awaits measuring, and then the parameter that awaits measuring of the first proportion electro-magnet is calculated out to the reading of accessible amesdial 3 and the reading of force sensor 6, the utility model provides a multiple parameter of the first proportion electro-magnet of check out test set detectable of proportion servo valve, only need according to the demand change the subassembly that awaits measuring can, for example the gain of the electro-magnet of first proportion electro-magnet and proportion solenoid valve is markd, the zero-position stiction force of valve barrel and case, the linearity of spring rigidity and spring force, the dynamic response test of spring etc. and then improve the supporting qualification rate of product, play the decisive role to product quality's stability in the mass production. Therefore, the utility model provides an embodiment of a plurality of first proportion electro-magnet's check out test set.
With continuing reference to fig. 1 and fig. 2, in a first embodiment of the detection apparatus of the proportional servo valve, the detection apparatus is configured to perform electromagnet zero position detection of a first proportional electromagnet and gain calibration of a proportional solenoid valve, the component to be tested includes a first proportional electromagnet 13, a first displacement sensor 14, and a first percentile meter (not shown in the figure), the first proportional electromagnet 13 is fixed on the second fixing base 12, the first percentile meter is connected to the first displacement sensor 14, the first displacement sensor 14 is further connected to a thrust output rod of the first proportional electromagnet 13, and the thrust output rod of the first proportional electromagnet 13 can be pushed by the test push rod 3.
Preferably, the first displacement sensor 14 is an L VDT displacement sensor, which has high sensitivity, wide linear range and recoverable zero position.
Preferably, in the first embodiment of the detection apparatus for the proportional servo valve, the detection apparatus further comprises a control box (not shown), an L VDT analysis plate (not shown), and a multimeter (not shown), wherein a power supply is arranged in the control box, the power supply is connected with a power line of the first proportional electromagnet, the L VDT analysis plate is connected with the first displacement sensor, and the multimeter is used for measuring a feedback voltage of the control box.
In the embodiment, when detection equipment of the proportional servo valve detects a situation, a first proportional electromagnet 13 is installed on a second fixed seat 12, then a power supply in a control box is connected with a power line of the first proportional electromagnet 13, a L VDT analysis plate is connected with a L VDT displacement sensor 14, correct line connection and normal line connection are guaranteed, then the power supply of the control box is powered, the feeding hand wheel 11 is shaken clockwise at the moment, the feeding hand wheel 11 drives the feeding screw 9 to move towards the direction close to the first proportional electromagnet 13 when shaking, the testing ejector rod 3 gradually approaches the thrust output rod of the first proportional electromagnet 13 at the moment, a tester observes the reading of force in the force sensor 6, when the reading of the force in the force sensor 6 exceeds zero, the testing ejector rod 3 is in abutting joint with the thrust output rod of the first proportional electromagnet, the operator immediately stops shaking the feeding hand wheel 11 and stirs the thrust output rod of the multimeter 4 to enable the reading of the multimeter 4 to return to zero, the dial of the testing equipment is debugged, parameter testing is started, the operator continues to adjust the testing ejector rod, the feeding voltage of the feeding hand wheel 13, the testing electric potential of the first proportional electromagnet, the electric potential of the multimeter, the first proportional electromagnet 13 is adjusted by the electric potential of the testing ejector rod, the first proportional electromagnet, the testing ejector rod, the testing device, the testing ejector rod is adjusted by the testing device, the testing of the testing electric potential of the first proportional electromagnet 13, the electric potential of the multimeter 4, the testing device, the testing electric potential of the testing device, the testing device is adjusted by the testing device, the testing device is adjusted by the testing device, the testing device.
Referring to fig. 3 and 4, in a second embodiment of the detection apparatus of the proportional servo valve, the detection apparatus is used for performing zero static friction force test of the valve sleeve and the valve core, the component to be tested includes a support rod 15, a valve body 16, a valve sleeve 17, a valve core 18 and a second dial indicator (not shown in the figure), the support rod 15 is fixed on the second fixing seat 12, the valve sleeve 17 is fixed on the support rod 15, the valve body 16 is fixedly connected with the valve sleeve 17, the valve core 18 is located in the valve sleeve 17 and can be pushed by the test push rod 3 to move in the valve sleeve 17, and the valve core 18 is further connected with the second dial indicator.
In this embodiment, when the detection device of the proportional servo valve detects, firstly, the valve body 16, the valve sleeve 17 and the valve core 18 are assembled and mounted on the support rod 15, then the valve core 18 is manually pushed to a reference surface position (a position shown in fig. 3 and 4) of the top end of the valve sleeve 17, the feeding hand wheel 11 is slowly shaken to make the test push rod 3 approach to the top end of the valve core 18, and the test push rod stops until contact is confirmed (the judgment method for confirming contact is similar to that in the first embodiment, specifically, the force reading in the force sensor 6 is observed, and when the force reading in the force sensor 6 exceeds zero, the test push rod 3 is indicated to be in contact with the top end of the valve core 18); then an operator dials the dial plate of the dial indicator 4, after the reading of the dial indicator 4 is reset to zero, the feeding hand wheel 11 is continuously and clockwise shaken to push the valve core 18 to move backwards, and meanwhile, the reading of the second dial indicator is observed to gradually move to the design zero position, and through observing the reading of the dial indicator 4, when the valve core 18 is close to the design zero position, the reading of the force sensor 6 is observed, so that the maximum dynamic friction force of the zero positions of the valve sleeve and the valve core is monitored.
Referring to fig. 5 and 6, in a third embodiment of the detection apparatus of the proportional servo valve, the detection apparatus is configured to perform a spring stiffness and spring force linearity test, the component to be tested includes a spring seat 19, a first spring 20, a spring pressing rod 21, a test mounting seat 22, and a third dial indicator (not shown in the figure), the spring seat 19 is fixed on the second fixing seat 12, the first spring 20 and the test mounting seat 20 are both fixed on the spring seat 19, the spring pressing rod 21 is mounted on the test mounting seat 22 and slidably connected to the test mounting seat 22, the spring pressing rod 21 can be pushed by the test ejector rod 3 to press the first spring 20, and the first spring 20 is further connected to the third dial indicator.
In this embodiment, when the detection device of the proportional servo valve detects, an operator first installs the first spring 20 on the spring seat 19, then adjusts the zero position of the third dial indicator to the free length of the first spring 20, slowly shakes the feeding hand wheel 11 to enable the test ejector rod 3 to approach the spring pressing rod 21 until contact is confirmed and then stops (the judgment method for confirming contact is similar to that in the first embodiment, specifically, the judgment method for observing the force reading in the force sensor 6 is similar to that in the first embodiment, when the force reading in the force sensor 6 exceeds zero, the test ejector rod 3 is in contact with the spring pressing rod 21), then the operator dials the dial plate of the dial indicator 4, after the reading of the dial indicator 4 is reset to zero, continues to clockwise shake the feeding hand wheel 11 to push the spring pressing rod 21 to press the first spring 20, and simultaneously observes the reading of the third dial indicator to gradually move to the designed zero position, by observing the reading of the dial indicator 4, when the first spring 20 is close to the design zero position, the reading of the force sensor 6 is observed, and the spring stiffness and the linearity of the spring force are monitored.
Referring to fig. 7 and 8, in a fourth embodiment of the detection device of the proportional servo valve, the detection device is configured to perform a dynamic response test on a spring, the component to be tested includes a second spring 23, a second proportional electromagnet 24, a second displacement sensor 25, and a fourth dial indicator (not shown in the figure), the second proportional electromagnet 24 is fixed on the second fixing seat 12, the second displacement sensor 25 is connected to a thrust output rod of the second proportional electromagnet 24, the second spring 23 is fixed on the thrust output rod of the second proportional electromagnet 24 and is located between the thrust output rod of the second proportional electromagnet 24 and the test carrier rod 3, the second spring 23 can be pressed by the test carrier rod 3, and the second spring 23 is further connected to the fourth dial indicator.
Preferably, the second displacement sensor 25 is an L VDT displacement sensor, which has high sensitivity, wide linear range and recoverable zero position.
Preferably, in a fourth embodiment of the detection device of the proportional servo valve, the detection device further comprises an oscilloscope (not shown in the figure), which is electrically connected to the second proportional electromagnet 24.
In this embodiment, when the detection device of the proportional servo valve detects, an operator firstly installs the second spring 23 in place, electrically connects the oscilloscope with the second proportional electromagnet 24 and ensures correct connection, then slowly shakes the feeding hand wheel 11, when the force reading in the force sensor 6 exceeds zero, it indicates that the testing ejector rod 3 is in contact with the second spring 23, at this time, the dial of the dial indicator 4 is shifted, after the reading of the dial indicator 4 is reset to zero, the feeding hand wheel 11 is continuously shaken clockwise to push the second spring to compress, and at the same time, the reading of the fourth dial indicator is observed, so that the fourth dial indicator gradually moves to a designed zero position; during testing, the second proportional electromagnet 24 plays a driving role, sinusoidal working current is input into the second proportional electromagnet 24 during testing, the second spring 23 follows up, signals analyzed by the force sensor 6 are connected with an oscilloscope at the moment, then the current sweep frequency input into the second proportional electromagnet is continuously increased, the following amplitude frequency and the phase frequency of the spring force can be determined through the oscilloscope, and therefore the dynamic response test of the spring is completed.
To sum up, the utility model provides a detection device of proportional servo valve, including base, first fixing base, test ejector pin, amesdial supporting seat, force transducer, distance piece bearing needle, position calibration screw, feed screw, screw rod supporting seat, feeding hand wheel and testing arrangement, first fixing base is fixed on the base, amesdial supporting seat and screw rod supporting seat are all installed on the first fixing base, the feed hand wheel is connected with one end of feed screw, the other end of feed screw passes through the screw rod supporting seat and is fixedly connected with one end of force transducer, the distance piece bearing needle suit is in the position department that feed screw is close to force transducer, the amesdial is fixed on the amesdial supporting seat, the measuring staff of amesdial with position calibration screw is connected, the position calibration screw is fixed with the feeding screw rod, the other end of the force sensor is connected with the testing ejector rod, the testing device comprises a second fixing seat and a component to be tested, the component to be tested is fixed on the second fixing seat, the second fixing seat is fixed on the base, and the component to be tested is located on one side of the testing ejector rod. The utility model discloses but the multiple parameter of proportional valve servo valve detects, effectively improves detection precision and detection efficiency and supporting qualification rate.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (9)
1. The detection equipment of the proportional servo valve is characterized by comprising a base, a first fixing seat, a test ejector rod, a dial indicator supporting seat, a force sensor, a thrust piece needle bearing, a position calibration screw, a feeding screw rod, a screw rod supporting seat, a feeding hand wheel and a testing device, wherein the first fixing seat is fixed on the base, the dial indicator supporting seat and the screw rod supporting seat are both arranged on the first fixing seat, the feeding hand wheel is connected with one end of the feeding screw rod, the other end of the feeding screw rod penetrates through the screw rod supporting seat and is fixedly connected with one end of the force sensor, the thrust piece bearing is sleeved at the position of the feeding screw rod close to the force sensor, the dial indicator is fixed on the dial indicator supporting seat, a measuring rod of the dial indicator is connected with the position calibration screw rod, and the position calibration screw rod is fixed with the feeding screw rod, the other end of the force sensor is connected with the test ejector rod, the test device comprises a second fixing seat and a component to be tested, the component to be tested is fixed on the second fixing seat, the second fixing seat is fixed on the base, and the component to be tested is located on one side of the test ejector rod.
2. The detection device of the proportional servo valve as claimed in claim 1, wherein the component to be tested comprises a first proportional electromagnet, a first displacement sensor and a first dial indicator, the first proportional electromagnet is fixed on the second fixed seat, the first dial indicator is connected with the first displacement sensor, the first displacement sensor is further connected with a thrust output rod of the first proportional electromagnet, and the thrust output rod of the first proportional electromagnet can be pushed by the test ejector rod.
3. Detection apparatus of a proportional servo valve according to claim 2, wherein the first displacement sensor is an L VDT displacement sensor.
4. The proportional servo valve detection apparatus of claim 3, further comprising a control box, L VDT analysis board and a multimeter, wherein the control box is provided with a power supply connected to the power line of the first proportional electromagnet, the L VDT analysis board is connected to the first displacement sensor, and the multimeter is used for measuring the feedback voltage of the control box.
5. The detection device of the proportional servo valve as claimed in claim 1, wherein the component to be tested comprises a support rod, a valve body, a valve sleeve, a valve core and a second dial indicator, the support rod is fixed on the second fixing seat, the valve sleeve is fixed on the support rod, the valve body is fixedly connected with the valve sleeve, the valve core is located in the valve sleeve and can be pushed by the test ejector rod to move in the valve sleeve, and the valve core is further connected with the second dial indicator.
6. The detection device of the proportional servo valve according to claim 1, wherein the component to be tested comprises a spring seat, a first spring, a spring pressing rod, a test mounting seat and a third dial indicator, the spring seat is fixed on the second fixing seat, the first spring and the test mounting seat are both fixed on the spring seat, the spring pressing rod is mounted on the test mounting seat and is in sliding connection with the test mounting seat, the spring pressing rod can be pushed by the test ejector rod to extrude the first spring, and the first spring is further connected with the third dial indicator.
7. The detection device of the proportional servo valve according to claim 1, wherein the component to be tested comprises a second spring, a second proportional electromagnet, a second displacement sensor and a fourth dial indicator, the second proportional electromagnet is fixed on the second fixing seat, the second displacement sensor is connected with a thrust output rod of the second proportional electromagnet, the second spring is fixed on the thrust output rod of the second proportional electromagnet and located between the thrust output rod of the second proportional electromagnet and a test ejector rod, the second spring can be extruded by the test ejector rod, and the second spring is further connected with the fourth dial indicator.
8. Detection apparatus of a proportional servo valve according to claim 7, wherein the second displacement sensor is an L VDT displacement sensor.
9. The apparatus for testing a proportional servo valve of claim 7, further comprising an oscilloscope electrically connected to the second proportional solenoid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926466.9U CN211013057U (en) | 2019-11-08 | 2019-11-08 | Detection equipment for proportional servo valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921926466.9U CN211013057U (en) | 2019-11-08 | 2019-11-08 | Detection equipment for proportional servo valve |
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| CN211013057U true CN211013057U (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117606337A (en) * | 2024-01-24 | 2024-02-27 | 威海双丰物探设备股份有限公司 | Strain measuring device for strain ring |
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2019
- 2019-11-08 CN CN201921926466.9U patent/CN211013057U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117606337A (en) * | 2024-01-24 | 2024-02-27 | 威海双丰物探设备股份有限公司 | Strain measuring device for strain ring |
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