CN114508986A - Method for measuring lever ratio of lever type geosynthetic material thickness gauge - Google Patents
Method for measuring lever ratio of lever type geosynthetic material thickness gauge Download PDFInfo
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- CN114508986A CN114508986A CN202210149028.6A CN202210149028A CN114508986A CN 114508986 A CN114508986 A CN 114508986A CN 202210149028 A CN202210149028 A CN 202210149028A CN 114508986 A CN114508986 A CN 114508986A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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Abstract
The invention discloses a method for measuring the lever ratio of a lever type geosynthetic material thickness gauge, which comprises a lever, wherein a standard dynamometer is arranged below a V-shaped groove of the lever, and the measuring method comprises the following steps: s1: when no weight is added, the lever is adjusted to be in a free horizontal state, and then the standard dynamometer is placed below the V-shaped groove of the lever, so that the pressure head is in contact with the V-shaped groove on the lever in the free horizontal state; s2: adding a first weight at the hook of the lever, and reading the reading on the standard dynamometer; s3: the step S2 is repeated three times and then follows the formula
Calculating lever ratio k of lever type geosynthetic material thickness gauge1. Compared with the prior art, the measuring method provided by the invention does not need to consider the position problems of the fulcrum and the stress point, and the stress application state during measurement is completely consistent with the situation during actual detection of the thickness of the geosynthetic material.
Description
Technical Field
The invention relates to the technical field of lever ratio measurement, in particular to a lever ratio measurement method of a lever type geosynthetic material thickness gauge.
Background
A lever-type geosynthetic material thickness gauge is an instrument for measuring the thickness of geosynthetic materials and related products under different pressure conditions within a specified time, and is widely applied to the engineering construction fields of water conservancy, electric power, mines, roads, railways and the like. The lever-type geosynthetic material thickness gauge generally comprises a level bubble, a base (adjustable in level), a reference plate, a lever, a support plate, a balance weight, a thickness measuring device and the like. The lever ratio of the lever type geosynthetic thickness gauge needs to be known in use, the lengths of two force arms of a lever are measured by adopting a steel ruler or a steel tape at present, and then the lever ratio is obtained through calculation. This method has the following problems: when the length of the force arm is measured, the fulcrum and the stress point are difficult to accurately master; the lever ratio measurement result is different from the actual use due to the fact that a plurality of factors such as knife edge abrasion, fulcrum movement caused by stress application and the like are not considered, and the geosynthetic material detection result is influenced.
Disclosure of Invention
Technical problem to be solved
Based on the above, the invention provides a method for measuring the lever ratio of a lever type geosynthetic material thickness gauge, and aims to solve the problem that the lever ratio measuring mode in the prior art is influenced by a fulcrum and a stress point, and the measuring result is different from that in actual use.
(II) technical scheme
The invention aims to overcome the problems or at least partially solve the problems and provides a lever ratio measuring method of a lever type geosynthetic material thickness gauge, which comprises a lever, wherein a standard dynamometer is arranged below a V-shaped groove of the lever, and the standard dynamometer comprises the following steps: the pressure head, the pressure sensor and the height adjusting mechanism are arranged between the pressure head and the base, the pressure sensor is connected with a dynamometer display screen, and a V-shaped strip matched with the V-shaped groove is arranged at the top end of the pressure head; the method for measuring the lever ratio of the lever-type geosynthetic thickness gauge further comprises the following steps:
s1: when no weight is added, the lever is adjusted to be in a free horizontal state, and then a standard dynamometer is placed below a V-shaped groove of the lever, so that the pressure head is in contact with the V-shaped groove on the lever in the free horizontal state;
s2: adding a first weight at the hook of the lever, and reading the reading on the standard dynamometer;
s3: repeating the step S2 for three times, and calculating the lever ratio k of the lever type geosynthetic material thickness gauge according to the formula (1)1；
In the formula: k is k1；
f0Is the first weight nominal value with the unit of N;
Preferably, the step of adjusting the lever to a free level state comprises: the lever is adjusted to a free horizontal state by moving the balance weight.
Preferably, in the step of bringing the indenter into contact with the V-groove of the lever in a free horizontal state: and the pressure head is contacted with the V-shaped groove of the lever in a free horizontal state by adjusting a height adjusting mechanism of the standard dynamometer.
Preferably, the first weight is a 0.5N force value weight.
Preferably, the method further comprises the following steps:
s4: adding a second weight at the hook of the lever, and reading the reading on the standard dynamometer;
the step S4 is repeated three times, and then k is calculated by the formula (1)2(ii) a In the formula: k is k2；f0Is the nominal value of the second weight, and the unit is N;
is the average of three readings of a standard dynamometer, in N;
s5: adding a third weight at the hook of the lever, and reading the reading on the standard dynamometer;
the step S5 is repeated three times, and then k is calculated by the formula (1)3(ii) a In the formula:
k is k3，f0Is the nominal value of the third weight, and the unit is N;
is the average of three readings of a standard dynamometer, in N;
through k1、k2And k3Obtaining a lever ratio of a lever type geosynthetic thickness gauge of
Preferably, the second weight is a 5N force value weight and the third weight is a 50N force value weight.
Preferably, the pressure sensor is arranged at the upper end of the height adjusting mechanism.
(III) advantageous effects
Compared with the prior art, the lever ratio is calculated by placing the standard dynamometer on the lever type geosynthetic material thickness gauge and testing the force value and the weight, the measurement method does not need to consider the position problem of the fulcrum and the stress point, the main body framework of the lever type geosynthetic material thickness gauge does not need to be changed, namely the connection relation among the lever, the balance weight and the support plate does not need to be changed, the measurement result is directly obtained through the force value, and the stress application state is completely consistent with the situation when the thickness of the geosynthetic material is actually detected, so that the lever ratio measurement result cannot be influenced by the factors such as abrasion of a knife edge, movement of the fulcrum caused by stress application and the like. Secondly, the measuring method has less working procedures, simple operation and low requirement on personnel. Thirdly, the standard dynamometer has simple structure, easy purchase and manufacture of each part and low input cost.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 is a schematic structural diagram of a measuring apparatus according to the present invention.
Description of reference numerals:
1. the device comprises a base, 2 parts of a lever, 21 parts of a V-shaped groove, 3 parts of a support plate, 4 parts of a balance weight, 5 parts of a hook, 6 parts of a standard dynamometer, 61 parts of a pressure head, 62 parts of a pressure sensor, 63 parts of a height adjusting mechanism, 64 parts of a dynamometer display screen and 611 parts of a V-shaped strip.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; the two elements may be mechanically or electrically connected, directly or indirectly connected through an intermediate medium, or connected through the inside of the two elements, or "in transmission connection", that is, connected in a power manner through various suitable manners such as belt transmission, gear transmission, or sprocket transmission. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the attached drawing 1, the embodiment provides a method for measuring a lever ratio of a lever type geosynthetic material thickness gauge, and the method comprises a base 1 and a lever 2, wherein a support plate 3 is arranged on the base 1, a rotating shaft is arranged on the support plate 3, the lever 2 is hinged to the support plate 3 through the rotating shaft, a balance weight 4 is arranged at one end of the lever 2, a hook 5 is arranged at the other end of the lever 2, and a standard force gauge 6 is arranged below a V-shaped groove 21 of the lever 2.
The standard load cell 6 includes: the pressure head 61, the pressure sensor 62 and the height adjusting mechanism 63 are arranged between the pressure head 61 and the base 1, the pressure sensor 62 is connected with a dynamometer display screen 64, the dynamometer display screen 64 is used for displaying pressure data transmitted by the pressure sensor 62, and the top end of the pressure head 61 is provided with a V-shaped strip 611 matched with the V-shaped groove 21.
Specifically, the balance weight 4 is in threaded connection with the lever 2, and the pressure sensor 62 is arranged at the upper end of the height adjusting mechanism 63.
The measuring method comprises the following steps:
s1: when no weight is added, the lever 2 of the lever type geosynthetic material thickness gauge is adjusted to be in a free horizontal state by moving the balance weight 4, then the standard dynamometer 6 is placed below the V-shaped groove 21 of the lever 2, and the pressure head 61 of the standard dynamometer 6 is in contact with the V-shaped groove 21 of the lever 2 in the free horizontal state by adjusting the height adjusting mechanism 63 of the standard dynamometer 6;
s2: adding a weight with a force value of 0.5N at the position of a hook 5 of the lever 2, and reading the reading on a standard dynamometer 6;
s3: repeating the step S2 for three times, and calculating the lever ratio k of the lever type geosynthetic material thickness gauge according to the formula (1)1；
In the formula: k is k1；
f0Is the first weight nominal value with the unit of N;
As another specific embodiment of the invention, the method further comprises the following steps:
s4: adding a 5N force value weight at the hook 5 of the lever 2, and reading the reading on the standard dynamometer 6;
the step S4 is repeated three times, and then k is calculated by the formula (1)2(ii) a In the formula: k is k2；f0Is the nominal value of the second weight, and the unit is N;
is the average of the three readings of the standard force gauge 6 in N; this arrangement effectively reduces the measurement error of the standard load cell 6.
S5: adding a 50N force value weight at the hook 5 of the lever 2, and reading the reading on the standard dynamometer 6;
the step S5 is repeated three times, and then k is calculated by the formula (1)3(ii) a In the formula:
k is k3，f0Is the nominal value of the third weight, and the unit is N;
is the average of the three readings of the standard force gauge 6 in N; this arrangement effectively reduces the measurement error of the standard force gauge 6.
Through k is1、k2And k3Obtaining a lever ratio of a lever type geosynthetic thickness gauge of
This setting can effectively reduce the measuring error of standard dynamometer 6 and the influence that different power value weights brought.
According to the invention, the standard force measuring instrument 6 is placed on the lever-type geosynthetic material thickness gauge, and then the lever ratio is calculated through testing a force value and a weight, the measurement method does not need to consider the position problem of a fulcrum and a stress point, the measurement method does not need to change the main body framework of the lever-type geosynthetic material thickness gauge, namely, the connection relation among the lever 2, the balance weight 4 and the support plate 3 does not need to be changed, the measurement result is directly obtained through the force value, and the stress application state is completely consistent with the situation when the thickness of the geosynthetic material is actually detected, so that the measurement result of the lever ratio cannot be influenced by the factors such as the abrasion of a knife edge, the movement of the fulcrum caused by stress application and the like. Secondly, the measuring method has less working procedures, simple operation and low requirement on personnel. Thirdly, the standard force measuring instrument 6 has a simple structure, and each part is easy to purchase and manufacture, and the investment cost is not high.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (7)
1. A method for measuring the lever ratio of a lever type geosynthetic thickness gauge comprises a lever, and is characterized in that a standard dynamometer is arranged below a V-shaped groove of the lever, and the standard dynamometer comprises the following steps: the pressure head, the pressure sensor and the height adjusting mechanism are arranged between the pressure head and the base, the pressure sensor is connected with a dynamometer display screen, and a V-shaped strip matched with the V-shaped groove is arranged at the top end of the pressure head; the method for measuring the lever ratio of the lever type geosynthetic material thickness gauge further comprises the following steps of:
s1: when no weight is added, the lever is adjusted to be in a free horizontal state, then the standard dynamometer is placed below a V-shaped groove of the lever, and the pressure head is in contact with the V-shaped groove on the lever in the free horizontal state;
s2: adding a first weight at the hook of the lever, and reading the reading on the standard dynamometer;
s3: repeating the step S2 for three times, and calculating the lever ratio k of the lever type geosynthetic material thickness gauge according to the formula (1)1；
In the formula: k is k1；
f0Is the first weight nominal value with the unit of N;
2. A method for measuring a lever ratio of a lever type geosynthetic thickness gauge as claimed in claim 1, wherein the step of adjusting the lever to a free level state comprises: the lever is adjusted to a free horizontal state by moving the balance weight.
3. A method of measuring the lever ratio of a lever type geosynthetic thickness gauge of claim 2 wherein, in the step of contacting the indenter with the V-groove of the lever in a free horizontal condition: and the pressure head is contacted with the V-shaped groove of the lever in a free horizontal state by adjusting a height adjusting mechanism of the standard dynamometer.
4. The method for measuring the leverage ratio of a leverage geosynthetic thickness gauge of claim 3, wherein the first weight is a 0.5N force value weight.
5. The method for measuring the leverage ratio of a leveraging geosynthetic thickness gauge of claim 4, further comprising the steps of:
s4: adding a second weight at the hook of the lever, and reading the reading on the standard dynamometer;
the step S4 is repeated three times, and then k is calculated by the formula (1)2(ii) a In the formula: k is k2；f0Is the nominal value of the second weight and has the unit of N;
is a standard testThe average of the three readings of the force meter in N;
s5: adding a third weight at the hook of the lever, and reading the reading on the standard dynamometer;
the step S5 is repeated three times, and then k is calculated by the formula (1)3(ii) a In the formula:
k is k3，f0Is the nominal value of the third weight, and the unit is N;
is the average of the three readings of the standard dynamometer, in N;
through k1、k2And k3Obtaining a lever ratio of a lever type geosynthetic thickness gauge of
6. The method of measuring the leverage ratio of a leverage geosynthetic thickness gauge of claim 5 wherein the second weight is a 5N force value weight and the third weight is a 50N force value weight.
7. A method of measuring the leverage ratio of a leverage gauge according to claim 6 wherein the pressure sensor is located at the upper end of the height adjustment mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149028.6A CN114508986B (en) | 2022-02-18 | Lever ratio measuring method of lever-type geosynthetic material thickness gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210149028.6A CN114508986B (en) | 2022-02-18 | Lever ratio measuring method of lever-type geosynthetic material thickness gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114508986A true CN114508986A (en) | 2022-05-17 |
| CN114508986B CN114508986B (en) | 2024-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419771A (en) * | 2023-12-18 | 2024-01-19 | 山东博硕自动化技术有限公司 | Device and method for dynamically detecting building material with irregular thickness |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419771A (en) * | 2023-12-18 | 2024-01-19 | 山东博硕自动化技术有限公司 | Device and method for dynamically detecting building material with irregular thickness |
| CN117419771B (en) * | 2023-12-18 | 2024-02-20 | 山东博硕自动化技术有限公司 | Device and method for dynamically detecting building material with irregular thickness |
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