CN210604142U - Concrete block strength detection pressure head - Google Patents
Concrete block strength detection pressure head Download PDFInfo
- Publication number
- CN210604142U CN210604142U CN201921327752.3U CN201921327752U CN210604142U CN 210604142 U CN210604142 U CN 210604142U CN 201921327752 U CN201921327752 U CN 201921327752U CN 210604142 U CN210604142 U CN 210604142U
- Authority
- CN
- China
- Prior art keywords
- pressure sensitive
- concrete block
- block strength
- main body
- current
- 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
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a concrete block strength detection pressure head, which comprises a main body, wherein an annular groove is arranged on the main body near the end part and a strain section is formed at the end; a plurality of pressure sensitive resistors are uniformly arranged in the annular groove, and two ends of each pressure sensitive resistor are respectively and tightly matched with the main body and the strain section. The utility model discloses utilize piezo-resistor to enlarge small deformation, can detect the weak slope of tested concrete face to readjust test position, avoid test structure to have the mistake.
Description
Technical Field
The utility model relates to an engineering detects technical field, in particular to concrete block strength detection pressure head.
Background
In order to ensure the quality of engineering, the strength of the concrete block needs to be detected, and in the process of pressing, a concrete block strength detection pressure head needs to be used, for example, a testing device in patent CN201010228160.3, the pressing must ensure that the pressure head is perpendicular to the detection surface, but when the surface of the concrete block is slightly inclined, the level gauge is difficult to detect, and at the moment, the direct pressure release test causes experimental errors.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a concrete piece intensity that can detect weak slope detects pressure head.
The technical scheme of the utility model is that:
a concrete block strength detection pressure head comprises a main body, wherein an annular groove is formed in the main body close to the tail end part of the main body, and a strain section is formed at the tail end of the main body; a plurality of pressure sensitive resistors are uniformly arranged in the annular groove, and two ends of each pressure sensitive resistor are respectively and tightly matched with the main body and the strain section.
Furthermore, the pressure sensitive resistors are connected in parallel and independently measure the current.
Further, the current values of the pressure sensitive resistors are respectively input into the PLC single chip microcomputer to be subjected to current concentration comparison.
Further, the alarm is further included, and the alarm is used for giving an alarm when the PLC single chip microcomputer detects that the current of the pressure sensitive resistor has deviation.
Further, the alarm gives an alarm when the current of the pressure sensitive resistor has deviation of more than 5%.
The utility model discloses an useful part lies in:
the utility model discloses utilize piezo-resistor to enlarge small deformation, can detect the weak slope of tested concrete face to readjust test position, avoid test structure to have the mistake.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of a pressure sensitive resistor arrangement.
In the figure: 1-main body, 2-annular groove, 3-strain section and 4-pressure sensitive resistor.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-2:
a concrete block strength detection pressure head comprises a main body 1, wherein an annular groove 2 is formed in the main body 1 close to the tail end part, and a strain section 3 is formed at the tail end; a plurality of pressure sensitive resistors 4 are uniformly arranged in the annular groove 2, and two ends of each pressure sensitive resistor 4 are respectively and tightly matched with the main body 1 and the strain section 3.
The working principle is as follows: the characteristic that the pressure sensitive resistor changes the resistor along with the pressure is utilized, when the detected concrete is not vertical to the pressure head, the edge of the strain section is firstly contacted with the concrete, the deformation of a contact point is the largest in continuous pressurization, the pressure sensitive resistor is stressed the largest, and the resistor changes. Therefore, the same voltage is only required to be applied to all the pressure sensitive resistors, under the condition of the same pressure (namely that concrete is vertical to a pressure head), the resistance change is the same, the current is consistent, and when the pressure is not vertical, the current values of different parts have difference values, so that the non-vertical situation can be determined only by monitoring the difference values. However, in order to avoid errors caused by complicated factors, it is recommended to set a minimum trigger difference value to avoid false triggering, and the selection percentage of the difference value is the best because of different resistances and different voltage applications.
Specifically, the pressure sensitive resistors 4 are connected in parallel, and the voltage inconsistency caused by a single power supply can be avoided by the parallel connection, so that the current can be measured independently.
Specifically, the current values of the pressure sensitive resistors 4 are respectively input into the PLC single-chip microcomputer, and are subjected to current concentration comparison, where the current concentration comparison is used for calculating a difference value, the maximum value and the minimum value of all the currents are taken to calculate a difference value, and then the difference value is divided by the minimum value to calculate the percentage.
Specifically, the alarm is further included and used for giving an alarm when the PLC single chip microcomputer detects that the current of the pressure sensitive resistor has deviation.
Specifically, the alarm gives an alarm when the current of the pressure sensitive resistor has deviation of more than 5%.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (5)
1. The utility model provides a concrete block strength detection pressure head, includes main part (1), its characterized in that: an annular groove (2) is formed in the main body (1) close to the tail end part, and a strain section (3) is formed at the tail end; a plurality of pressure sensitive resistors (4) are uniformly arranged in the annular groove (2), and two ends of each pressure sensitive resistor (4) are respectively and tightly matched with the main body (1) and the strain section (3).
2. The concrete block strength inspection indenter of claim 1, wherein: the pressure sensitive resistors (4) are connected in parallel and independently measure current.
3. The concrete block strength inspection indenter of claim 2, wherein: and the current values of the pressure sensitive resistors (4) are respectively input into the PLC singlechip to carry out current concentration comparison.
4. The concrete block strength inspection indenter of claim 3, wherein: the alarm is used for giving an alarm when the PLC single chip microcomputer detects that the current of the pressure sensitive resistor has deviation.
5. The concrete block strength inspection indenter of claim 4, wherein: the alarm gives an alarm when the current of the pressure sensitive resistor has deviation of more than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921327752.3U CN210604142U (en) | 2019-08-16 | 2019-08-16 | Concrete block strength detection pressure head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921327752.3U CN210604142U (en) | 2019-08-16 | 2019-08-16 | Concrete block strength detection pressure head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210604142U true CN210604142U (en) | 2020-05-22 |
Family
ID=70696884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921327752.3U Active CN210604142U (en) | 2019-08-16 | 2019-08-16 | Concrete block strength detection pressure head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210604142U (en) |
-
2019
- 2019-08-16 CN CN201921327752.3U patent/CN210604142U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015085812A1 (en) | Apparatus for measuring cell internal resistance online and measurement method therefor | |
| CN105241371B (en) | Resistance strain gage | |
| RU2498249C1 (en) | Manufacturing method of resistive strain-gauge pressure sensor based on thin-film nano- and microelectromechanical system | |
| CN202383021U (en) | Device for measuring tension and compression elasticity modulus of material | |
| CN201206966Y (en) | General-purpose gauge for special-shaped hole | |
| CN210604142U (en) | Concrete block strength detection pressure head | |
| CN106568536A (en) | Connector retention testing device | |
| RU2487328C1 (en) | Method to manufacture highly stable pressure sensor based on thin-film nano- and microelectromechanical system | |
| CN202057439U (en) | Clamp force testing sensor | |
| CN104614162B (en) | A kind of bolt connection part deformation and friction simulation test device | |
| CN201122116Y (en) | Measuring apparatus for contact pressure of isolating switch contact head | |
| RU2505791C1 (en) | Method of making pressure strain gage on basis of thin-film nano-and micro electromechanical system | |
| CN207066265U (en) | A kind of slide measure | |
| CN206670501U (en) | A kind of hand-held V sheaves circular runout detecting tool | |
| CN209910927U (en) | Special tool for detecting performance of grid framework strips | |
| CN104613850A (en) | Device for detecting depth of fastening hole in engine rockshaft | |
| CN205333737U (en) | Surface resistance measuring device of antistatic coating | |
| CN210689424U (en) | Counter sink hole measuring device | |
| CN108318934B (en) | Nut detection method | |
| CN204964105U (en) | Weight loading device | |
| CN209764562U (en) | Test system for detecting pre-tightening force of blind rivet | |
| CN207515934U (en) | A kind of pressure transition detecting device | |
| CN102183717B (en) | Four-probe piezoresistor tester and grading test method thereof | |
| CN217278783U (en) | Low-cost circuit board short circuit detection equipment | |
| CN205843886U (en) | A kind of dynamometer calibrating installation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |