Standard dynamometer

Abstract

The utility model discloses a standard dynamometer, and relates to the technical field of material testing machine calibration equipment. Comprising three force measuring sensors; the A / D converter is electrically connected with the three force sensors; the controller is electrically connected with the A / D converter; the touch screen is electrically connected with the controller; and the switching power supply is electrically connected with the controller and the touch screen. When the resistance strain type force transducer is stressed, the strain gauge attached to the elastic body correspondingly generates millivolt-level electric signals, output signals are filtered and amplified and converted into digital signals through the A / D converter, data processing is carried out by the controller, and measurement results are displayed on the touch screen. Therefore, the material testing machine with the measuring range greater than 20000 kN can be quickly and accurately verified or calibrated.

Description

TECHNICAL FIELD

[0001] The utility model relates to material testing machine calibration equipment technical field, especially relates to a standard dynamometer. BACKGROUND

[0002] The large range material testing machine, especially the equipment of range greater than 20000kN (i.e. 20MN), is specially designed for testing high-strength, large-scale structural components and materials. This kind of testing machine is usually applied in the fields of aerospace, bridge construction, heavy machinery manufacturing, construction industry and other fields that need to test the mechanical properties of large components or high-strength materials.

[0003] In order to achieve accuracy and reliability, it is necessary to calibrate the large range material testing machine, therefore, there is an urgent need for a standard dynamometer suitable for large range material testing machine (greater than 20000kN). CONTENT OF THE UTILITY MODEL

[0004] In order to solve the prior art problems, the utility model provides a standard dynamometer, which comprises:

[0005] Three force sensors;

[0006] An A / D converter, electrically connected with the three force sensors;

[0007] A controller, electrically connected with the A / D converter;

[0008] A touch screen, electrically connected with the controller;

[0009] A switching power supply, electrically connected with the controller and the touch screen.

[0010] Further, the three force sensors are all 10000 / 20000kN force sensors.

[0011] Further, the three force sensors are electrically connected with the A / D converter through different connection channels.

[0012] Further, the three force sensors are electrically connected with the connection channels through 15-core plugs, and the 15-core plugs contain channel identification chips.

[0013] Further, the controller is communicatively connected with a computer using a USB-to-485 communication line.

[0014] Further, it further comprises a mounting seat, and the mounting seat comprises:

[0015] A base placed on a testing machine workbench; the three force sensors are uniformly arranged on the top of the base;

[0016] Pressing plate, placed on top of three said force sensor;

[0017] Pressing seat, placed on top of said pressing plate;

[0018] Pressing cap, placed on top of said pressing seat.

[0019] Further, the force sensor and the pressing plate between the placement of the pad.

[0020] The beneficial effects of the technical scheme provided by the utility model are: three force sensors, an A / D converter, a controller, a touch screen and a switching power supply are arranged in the utility model, the three force sensors are electrically connected with the A / D converter, the A / D converter is electrically connected with the controller, the touch screen is electrically connected with the controller, the switching power supply is electrically connected with the controller and the touch screen, when the resistance strain type force sensor is stressed, the strain gauge pasted on the elastomer correspondingly generates a millivolt level electric signal, the output signal is filtered and amplified, the A / D converter converts into a digital signal, data processing is carried out by the controller and the measurement result is displayed on the touch screen, so that the calibration or verification of the material testing machine with a range greater than 20000kN can be quickly and accurately completed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the working principle schematic view of a standard force meter provided by the utility model;

[0022] Figure 2 It is a display upper panel drawing provided by the utility model;

[0023] Figure 3 It is the wiring schematic view of a force sensor provided by the utility model;

[0024] Figure 4 It is the side view of a mounting seat provided by the utility model;

[0025] Figure 5 It is the structural schematic view of a mounting seat provided by the utility model;

[0026] Figure 6 It is the display interface of the touch screen after three force sensors and display instruments are correctly connected provided by the utility model;

[0027] Figure 7 It is the display interface of the touch screen after three force sensors and display instruments are incorrectly connected provided by the utility model;

[0028] Figure 8 It is the display interface of the touch screen after a single force sensor and a display instrument are correctly connected provided by the utility model.

[0029] Marked: 1 - force sensor; 2 - A / D converter; 3 - controller; 4 - touch screen; 5 - switching power supply; 6 - base; 7 - testing machine workbench; 8 - pressing plate; 9 - pressing seat; 10 - pressing cap; 11 - backing plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] To make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0032] It should be noted that in the present embodiment, the orientation or position relationship indicated by "bottom", "top", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0033] It should also be noted that in the present embodiment, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Referring to Figures 1-8 A standard force measuring instrument is mainly suitable for the verification or calibration of test equipment such as a super-range (more than 20000kN) material testing machine, the range is 30000 / 60000kN, and includes three force sensors 1 and a display instrument. The three force sensors are 10000 / 20000kN force sensors, which can also be used alone, and the model can be C16A. The upper panel of the display instrument is provided with a touch screen 4, a switching power supply 5 and a connection channel, and is internally provided with a controller 3 and an A / D converter 2. The A / D converter 2 is electrically connected with the controller 3 (MGCplus), the three force sensors 1 are respectively electrically connected with the A / D converter 2 through different connection channels, and are electrically connected through 15-core plugs when connected with the connection channels. The 15-core plugs contain channel identification chips.

[0035] The touch screen 4 is electrically connected with the controller 3, and the switching power supply 5 is electrically connected with the controller 3 and the touch screen 4, adopts a standard three-core power socket, a normal working voltage is AC 190-250V, 49Hz-51Hz, and an insurance is AC 220V / 0.5A. In order to ensure the safety of the instrument and the stability of the measured data, the ground wire must be well grounded, and the positions of the zero line, the live wire and the ground wire of the three-core power socket should meet the relevant national electrical standards.

[0036] After the standard force transducer 1 is correctly connected with the display instrument, when the resistance strain type force transducer is stressed, the strain gauge attached on the elastic body correspondingly generates a millivolt level electric signal, the output signal is filtered and amplified, is converted into a digital signal by an A / D converter, data processing is carried out by the controller 3, and the measurement result is displayed on the touch screen 4.

[0037] In addition, the mounting seat further comprises a base 6 placed on a testing machine workbench 7, three force transducers 1 are uniformly arranged and placed on the top of the base 6, a pressing plate 8 is placed on the top of the force transducer 1, a cushion plate 11 is placed between the force transducer 1 and the pressing plate 8, a pressing seat 9 is placed on the top of the pressing plate 8, and a pressing cap 10 is placed on the top of the pressing seat 9.

[0038] After the mounting seat is installed, three force transducers 1 are correctly connected with the display instrument, and the touch screen displays the interface as shown in Figure 6 If connection is wrong, an interface as shown in Figure 7 After the power is turned on, the equipment needs to be preheated for 4 hours, and then the verification or calibration work can be carried out, the three-way real-time force value can be zeroed by pressing the zero setting key, the material testing machine is started, the load is slowly applied to the pressing cap, and the verification or calibration of the material testing machine can be completed according to the requirements of the relevant calibration regulations.

[0039] When a single sensor is used for verification / calibration, the power is turned off, the force transducers that are not needed are unplugged, the machine is started, and an interface as shown in Figure 8 Then the verification / calibration with a single sensor can be realized, and the value displayed by the total is the sum of the measured values of the opened channels.

[0040] The controller of the display instrument is connected with a computer in communication by using a USB-to-485 communication line, a standard Modbus RTU communication protocol is adopted, and then the data can be displayed.

[0041] The above merely describes preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection range of the utility model.

Claims

1. A standard dynamometer characterized in that, It comprises: three force sensors (1); an A / D converter (2) electrically connected with the three force sensors (1); a controller (3) electrically connected with the A / D converter (2); a touch screen (4) electrically connected with the controller (3); a switching power supply (5) electrically connected with the controller (3) and the touch screen (4).

2. The standard force gauge of claim 1, wherein, The three force sensors (1) are all 10000 / 20000kN force sensors.

3. The standard force gauge of claim 2, wherein, The three force sensors (1) are electrically connected with the A / D converter (2) through different connection channels.

4. The standard force gauge of claim 3, wherein, The three force sensors (1) are electrically connected with the connection channels through 15-core plugs, and the 15-core plugs contain channel identification chips.

5. The standard force gauge of claim 1, wherein, The controller (3) is communicatively connected with a computer using a USB-to-485 communication line.

6. The standard force gauge of claim 1, wherein, It further comprises: a mounting seat; the mounting seat comprises: a base (6) placed on a testing machine workbench (7); the three force sensors (1) are uniformly arranged and placed on the top of the base (6); a pressing plate (8) placed on the top of the three force sensors (1); a pressing seat (9) placed on the top of the pressing plate (8); a pressing cap (10) placed on the top of the pressing seat (9).

7. The standard dynamometer of claim 6, wherein, A spacer plate (11) is placed between the force sensor (1) and the pressing plate (8).

Images