Speed calibrating instrument

Abstract

The utility model discloses a speed verification instrument, and relates to the technical field of speed verification equipment. An upper reflection type laser sensor and a lower reflection type laser sensor, the upper reflection type laser sensor is located right above the lower reflection type laser sensor, and the upper reflection type laser sensor and the lower reflection type laser sensor are electrically connected with the display instrument; the reflector, the upper reflection type laser sensor, the lower reflection type laser sensor and the reflector are located on the two opposite sides of the drop hammer testing machine, the testing machine is started, the drop hammer is lifted to the maximum height of the testing machine, the drop hammer is released, the drop hammer freely falls down, timing is started when the drop hammer passes through an upper laser beam, and timing is stopped when the drop hammer passes through a lower laser beam. And when timing is stopped, the display instrument can display the instantaneous impact speed of the drop hammer, so that the inspection of the drop hammer testing machine is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to speed testing equipment technical field, especially relates to a speed testing instrument. BACKGROUND

[0002] Drop hammer testing machine is a kind of equipment for evaluating the behavior characteristics of material or structure under impact load. This testing machine is mainly used to test the impact resistance of material, understand its fracture characteristics, energy absorption capacity under rapid loading conditions, etc. It is widely used in scientific research, product development and quality control fields, especially in metal, plastic, composite material industries.

[0003] The basic working principle of drop hammer testing machine is to impact the sample by a freely falling weight, to measure the behavior of the sample when impacted. Usually, the weight falls from a certain height to impact the sample placed on the base of the testing machine at a predetermined speed. According to experimental requirements, the impact energy can be changed by adjusting the mass of the weight, the falling height or changing the shape and size of the sample.

[0004] In order to ensure the accuracy and reliability of the measurement results of drop hammer testing machine, it is necessary to test the speed of the weight falling, therefore, there is an urgent need for a device that can test the speed of the weight falling of drop hammer testing machine. SUMMARY

[0005] In order to solve the problems in the prior art, the utility model provides a speed testing instrument, comprising:

[0006] a display instrument;

[0007] an upper reflective laser sensor and a lower reflective laser sensor, the upper reflective laser sensor is located directly above the lower reflective laser sensor, and the upper reflective laser sensor and the lower reflective laser sensor are electrically connected with the display instrument;

[0008] a reflector, the upper reflective laser sensor and the lower reflective laser sensor are located on opposite sides of the drop hammer testing machine.

[0009] Further, the display instrument comprises:

[0010] a display instrument housing;

[0011] a controller located in the display instrument housing;

[0012] a display and a key, installed on the front panel of the display instrument housing, and both are electrically connected with the controller;

[0013] a sensor socket, a power socket and a power switch, installed on the rear panel of the display instrument housing, and all are electrically connected with the controller;

[0014] The upper reflective laser sensor and the lower reflective laser sensor are connected with the sensor socket by cables.

[0015] Further, the display instrument further comprises:

[0016] Serial ports are installed on the rear panel of the display instrument shell and are electrically connected with the controller, and the display instrument is connected with the upper computer in communication by serial port communication.

[0017] Further, the reflector is a triangular prism reflector.

[0018] Further, the upper reflective laser sensor and the lower reflective laser sensor are installed in the same shell and are supported by a support, and the reflector is installed in another shell and is supported by a support.

[0019] Further, the distance between the upper reflective laser sensor and the lower reflective laser sensor is 50mm.

[0020] The beneficial effects of the technical scheme provided by the utility model are that: the utility model discloses a display instrument, an upper reflective laser sensor, a lower reflective laser sensor and a reflector are arranged, the upper reflective laser sensor is located directly above the lower reflective laser sensor, during calibration, the upper reflective laser sensor, the lower reflective laser sensor and the reflector are respectively placed on the opposite sides of a testing machine, the testing machine is started, a drop hammer is lifted to the maximum height of the testing machine, the drop hammer is released and allowed to freely fall, when the drop hammer passes through the upper laser beam, timing is started, when the drop hammer passes through the lower laser beam, timing is stopped, and the display instrument can display the instantaneous impact speed of the drop hammer, thereby completing the calibration of the drop hammer testing machine. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of a speed calibrating instrument provided by the utility model;

[0022] Figure 2 It is a structural schematic view of a display instrument front panel provided by the utility model;

[0023] Figure 3 It is a structural schematic view of a display instrument rear panel provided by the utility model;

[0024] Figure 4 It is a wiring schematic view of a reflective laser sensor provided by the utility model;

[0025] Figure 5 It is a connection schematic view of an upper reflective laser sensor, a lower reflective laser sensor, a support and a reflector and a support provided by the utility model.

[0026] Figure 6 The utility model provides a kind of connection schematic view of shell and upper reflective laser sensor, lower reflective laser sensor.

[0027] Reference signs: 1-display instrument;2-upper reflective laser sensor;3-lower reflective laser sensor;4-reflector;5-display;6-key;7-sensor socket;8-power socket;9-power switch;10-serial port;11-bracket;12-drop hammer;13-laser emitter;14-housing;15-through hole;16-screw rod. DETAILED DESCRIPTION

[0028] 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 part 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 labor fall within the scope of protection of the present application.

[0029] To make the purpose, technical scheme and advantages of the utility model more clear, the utility model embodiment will be described in further detail below with reference to the drawings.

[0030] 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, and 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.

[0031] 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, can be fixedly connected, can be 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 specific circumstances.

[0032] A speed detector, comprising: display instrument 1, upper reflective laser sensor 2, lower reflective laser sensor 3 and reflector 4. Upper reflective laser sensor 2, lower reflective laser sensor 3 are both German high-precision reflective laser sensors, with the characteristics of high sensitivity, fast response speed and high reliability;Reflector 4 is a precision three-prism reflector.

[0033] The display instrument 1 comprises a display instrument shell and a controller, the controller can be of a SIMATIC S7-1200 type, a display 5 and a button 6 are installed on a front panel of the display instrument shell, the display 5 and the button 6 are electrically connected with the controller, the display 5 is used for displaying time and speed, and the button 6 is used for setting and calibration, etc.; a sensor socket 7, a power socket 8, a power switch 9 and a serial port 10 are installed on a rear panel of the display instrument shell, the sensor socket 7, the power socket 8, the power switch 9 and the serial port 10 are electrically connected with the controller, the power socket 8 adopts a standard three-core power socket, a normal working voltage is AC 190-250V, 49Hz-51Hz, an insurance is AC 220V / 0.2A, in order to ensure safety of instrument working and stability of measurement data, the three-core power socket must be well grounded, positions of zero line, fire line and ground line of the three-core power socket should meet relevant national electrical standards.

[0034] The upper reflective laser sensor 2 and the lower reflective laser sensor 3 are installed in the same shell to form a laser emitter 13, the upper reflective laser sensor 2 is located directly above the lower reflective laser sensor 3, a distance between the upper reflective laser sensor 2 and the lower reflective laser sensor 3 is 50mm, the upper reflective laser sensor 2 and the lower reflective laser sensor 3 are connected with the sensor socket 7 through a 9-core D-type socket by a cable, a bridge voltage of the upper reflective laser sensor 2 and the lower reflective laser sensor 3 is DC 15V, and an output is a switching signal, the reflector 4 is installed in another shell to form a reflector.

[0035] The display instrument 1 adopts serial port communication to send data to an upper computer, a 9-hole D-type socket is connected with the upper computer, the two reflective laser sensors are connected with the display instrument 1, after starting, the display instrument 1 is self-checked and enters a measurement state, generally, preheating is 15 minutes. A "zero setting" button is pressed, the display 5 is cleared, two supports are used to fix and support the shell installed with the upper reflective laser sensor 2 and the lower reflective laser sensor 3 and the shell installed with the reflector 4, and are placed on opposite sides of a drop hammer testing machine, it is ensured that there is no shielding object between the two reflective laser sensors and the reflector, and a light beam is perpendicular to a track of a falling hammer. The support is a support in the prior art, and a structure thereof is not described herein, and the support and the shell can be fixed through bolts.

[0036] The two reflective laser sensors emit red laser beams, then the reflector is aligned with the light beams, the laser beams are in the middle of the reflector, the "zero setting" button is pressed, and the display is cleared. A non-transparent object with an outer diameter greater than 10mm is used to shield the upper reflective laser sensor instantaneously, timing starts, then the lower reflective laser sensor is shielded instantaneously, timing stops, then the test system is normal, and drop hammer impact speed testing can be performed.

[0037] The falling hammer impact velocity measurement, according to the "zero" button, the display is cleared, the tester is started, the falling hammer is lifted to the maximum height of the tester, the falling hammer is released, and the falling hammer is freely dropped, when the falling hammer passes through the upper laser beam, the timing is started, when the falling hammer passes through the lower laser beam, the timing is stopped, at this time, the display 5 upper row displays the time (unit: second) of the falling hammer passing through the upper and lower laser beams, and the display 5 lower row displays the instantaneous impact velocity (unit: m / s) of the falling hammer.

[0038] In order to prevent the rebound of the falling hammer from causing secondary measurement, only one measurement is performed after the "zero" button is pressed each time, when the timing is stopped after one detection is completed, the "zero" button is pressed to clear the display and perform the next detection.

[0039] It should be noted that the connection distance of the upper reflective laser sensor 2 and the lower reflective laser sensor 3 and the shell 14 is described in the embodiment, two through holes 15 can be provided on the shell 14, the top and bottom of the shell are respectively provided with connection holes in communication with the through holes, and threaded rods 16 are threadedly connected in the connection holes, the upper reflective laser sensor 2 and the lower reflective laser sensor 3 can be placed in the upper and lower through holes, and the upper reflective laser sensor 2 and the lower reflective laser sensor 3 are fixed by tightening the threaded rods 16; the connection of the reflector 4 and another shell can also be in the same way.

[0040] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A speed calibrator, characterized by, The utility model relates to a display instrument (1) for falling weight testing machine, which comprises: a display instrument (1); an upper reflective laser sensor (2) and a lower reflective laser sensor (3), wherein the upper reflective laser sensor (2) is located directly above the lower reflective laser sensor (3), and the upper reflective laser sensor (2) and the lower reflective laser sensor (3) are electrically connected with the display instrument (1); a reflector (4), wherein the upper reflective laser sensor (2) and the lower reflective laser sensor (3) are located on opposite sides of the falling weight testing machine.

2. The speed prover of claim 1 wherein, The display instrument (1) comprises: a display instrument shell; a controller located in the display instrument shell; a display (5) and a button (6) installed on the front panel of the display instrument shell, and both are electrically connected with the controller; a sensor socket (7), a power socket (8) and a power switch (9) installed on the rear panel of the display instrument shell, and all are electrically connected with the controller; the upper reflective laser sensor (2) and the lower reflective laser sensor (3) are connected with the sensor socket (7) by cables.

3. The speed prover of claim 2 wherein, The display instrument (1) further comprises: a serial port (10) installed on the rear panel of the display instrument shell, and all are electrically connected with the controller, and the display instrument (1) is connected with the upper computer by serial communication.

4. The speed prover of claim 1 wherein, The reflector (4) is a triangular prism reflector.

5. The speed prover of claim 1 wherein, The upper reflective laser sensor (2) and the lower reflective laser sensor (3) are installed in the same shell and supported by a support (11), and the reflector (4) is installed in another shell and supported by a support (11).

6. The speed prover of claim 1 wherein, The distance between the upper reflective laser sensor (2) and the lower reflective laser sensor (3) is 50 mm.

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