Rotary table rotating speed testing device

Abstract

The utility model relates to the technical field of rotary table testing, in particular to a rotary table rotating speed testing device, which specifically comprises a turnover body, a photoelectric sensing device, a relay and a timing device, the turnover body is connected with a rotary table and does circular motion along with the rotary table during testing, and the photoelectric sensing device sends out a signal when the turnover body moves to a sensing area of the photoelectric sensing device. The relay receives a signal sent by the relay and opens and closes the contact, the timing device is connected with the relay to detect the signal output by the relay contact and starts and stops timing, the turnover body is provided with a shading part, and the shading part passes through an induction area of the photoelectric induction device and shields light when doing circular motion. When the shading part rotates along with the rotary table for testing, light of the photoelectric sensing device is intermittently shaded, and the time of complete circular motion of the rotary table is automatically and accurately measured in cooperation with starting and stopping of the relay and the timing device, so that the rotating speed of the rotary table is calculated, interference of human factors is completely eliminated, and the precision of a measurement result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of turntable testing, in particular to a turntable rotation speed testing device. Background Art

[0002] Turntables are currently widely used in measurement, control, and monitoring equipment. In some applications requiring high control accuracy, speed stability is a crucial metric. Currently, this is measured by recording the turntable's position increments over a specified period of time to calculate the turntable's rotational speed. The actual rotational speed is then compared with the set speed to determine the turntable's speed stability accuracy. The time is recorded by the tester using a stopwatch, while the turntable's position increments are read using PC software.

[0003] While it's theoretically possible to calculate the rotational speed by counting the turntable's rotation angle increments over a certain period of time, in practice, the tester visually observes the turntable rotate to a specific position, then presses a stopwatch button and immediately records the position code information displayed on the computer screen. This delay, along with factors like human reaction time, equipment communication lag, and host computer display filtering, can all lead to unstable time delays, all of which affect the accuracy of the measurement results. While it's possible to average multiple sets of measurement data, it's still possible that some invalid measurement data won't be eliminated. Therefore, this application proposes a turntable speed test device. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a turntable speed testing device, which completely eliminates the interference of human factors and improves the accuracy of measurement results.

[0005] The turntable speed test device provided in this solution specifically includes:

[0006] The rotating body is connected to the turntable and moves in a circular motion with it during testing;

[0007] A photoelectric sensing device that sends a signal when the rotating body moves into its sensing area;

[0008] The relay is connected to the photoelectric sensing device, receives the signal from it and opens and closes the contacts;

[0009] and a timing device connected to the relay to detect the signal output by the relay contact and start and close the timing;

[0010] The rotating body has a light shielding portion, which passes through the sensing area of ​​the photoelectric sensing device and blocks light when performing circular motion.

[0011] The technical solution further defined in the present utility model is:

[0012] Furthermore, the light path of the photoelectric sensing device is perpendicular to the circular motion plane of the rotating body.

[0013] Furthermore, the photoelectric sensing device includes at least one of a through-beam photoelectric switch, a reflective photoelectric switch and a diffuse reflection photoelectric switch.

[0014] Furthermore, the photoelectric sensing device includes a photoelectric transmitting end and a photoelectric receiving end.

[0015] Furthermore, the photoelectric transmitting end is connected to the power supply through a resistor, the collector of the photoelectric receiving end and the resistor are connected in series to the power supply, and its emitter is connected to the base of the transistor; the collector of the transistor and the relay coil are connected in series to the power supply, and its emitter is connected to the power ground; the relay contacts are connected to the detection port of the timing device.

[0016] Furthermore, the rotating body includes a cross bar.

[0017] Furthermore, the timing device includes a stopwatch.

[0018] The beneficial effects of the present invention are as follows: the turntable speed testing device provided by the present invention, when the light shielding portion on the rotating body rotates with the turntable during the test, intermittently blocks the light of the photoelectric sensing device, and cooperates with the opening and closing of the relay and the timing device to automatically and accurately measure the time it takes for the turntable to perform a complete circular motion, thereby calculating the speed of the turntable, completely eliminating the interference of human factors and ensuring the accuracy of the measurement results; the present invention can also be combined with a stopwatch that can record multiple sets of data, and collect multiple sets of turntable circular rotation data during testing for summary analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a turntable speed testing device in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the light shielding body in operation according to an embodiment of the present invention;

[0021] Figure 3 This is a circuit diagram of the turntable speed testing device in an embodiment of the present utility model;

[0022] Among them: 10, rotating body; 10a, light shielding part; 11, circular schematic line; 20, photoelectric sensing device; 20a, photoelectric transmitting end; 20b, photoelectric receiving end; 21, light path; 30, relay; 40, timing device; 50, turntable. DETAILED DESCRIPTION

[0023] The turntable speed testing device provided in this embodiment is as follows: Figure 1As shown, the apparatus comprises a rotating body 10 and a connected photoelectric sensor device 20, a relay 30, and a timing device 40. The rotating body 10 is connected to a turntable 50 to be tested and moves in a circular motion with the turntable 50 during testing. The photoelectric sensor device 20 emits a signal when the rotating body 10 passes through its sensing area. The relay 30 receives the signal and opens and closes its contacts. The timing device 40 detects the signal output by the relay contacts and starts and closes the timing device. Specifically, the rotating body 10 has a light shielding portion 10a. When the light shielding portion 10a moves in a circular motion with the turntable 50, it passes through the sensing area of ​​the photoelectric sensor device 20 and blocks light. This allows the rotating body 10 to trigger the photoelectric sensor device 20 once each time the turntable 50 rotates along the circumferential line 11. The timing device 40 then determines the time it takes for the turntable 50 to rotate once.

[0024] See also Figure 2 In a specific embodiment of the present invention, the photoelectric sensing device 20 is specifically a through-type photoelectric switch, including a photoelectric emitting end 20a and a photoelectric receiving end 20b. The photoelectric emitting end 20a emits light, and the photoelectric receiving end 20b receives the light. The formed light path 21 is perpendicular to the circular motion plane of the rotating body 10. In some other embodiments, the light path 21 can also be in a non-vertical state. For example, the photoelectric emitting end 20a and the photoelectric receiving end 20b can also be staggered so that the light path 21 is inclined in space. It is only necessary for the light path 21 to pass through the partial area of ​​the circular motion of the shading portion 10a to block the light.

[0025] At the same time, the rotating body 10 in this embodiment is a horizontal bar, and the whole has a shading effect; the timing device 40 is specifically a high-precision stopwatch, which can ensure the accuracy of the measurement results. At the same time, the stopwatch has a recording space for multiple sets of data, which is convenient for collecting multiple sets of data for summary analysis. In some other implementations, the timing device 40 can also be other timing instruments, and only the contacts of the relay 30 can trigger the opening and closing of the timing instrument.

[0026] like Figure 3 As shown in the figure, it is a circuit diagram of the turntable speed test device of this embodiment. The photoelectric transmitting end 20a is connected to the power supply through a resistor, the collector of the photoelectric receiving end 20b and the resistor are connected in series to the power supply, and its emitter is connected to the base of the transistor; the collector of the transistor and the relay 30 coil are connected in series to the power supply, and its emitter is connected to the power ground; the relay contact is connected to the detection port of the timing device 40.

[0027] It will be appreciated that when the turntable 50 of this embodiment rotates, the rotor drives the crossbar, which sweeps past the through-beam photoelectric switch once per revolution. When the through-beam photoelectric switch is blocked, the control circuit triggers the contact of the relay 30 to close once. By using a timing device 40 (a stopwatch) to measure the time interval between each rotation of the relay 30 contacts, the rotational speed and accuracy of the turntable 50 can be calculated. This method completely eliminates human interference and ensures the accuracy of the measurement results.

[0028] In addition to the above embodiments, the present invention may also have other implementation methods; any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A turntable speed testing device, characterized in that: include: The rotating body (10) is connected to the turntable (50) and moves in a circular motion therewith during testing; A photoelectric sensing device (20) emits a signal when the rotating body (10) moves to its sensing area; A relay (30) is connected to the photoelectric sensing device (20), receives the signal sent by the photoelectric sensing device and opens and closes the contacts; and a timing device (40) connected to the relay (30) to detect the signal output by the relay contact and start and close the timing; The rotating body (10) has a light shielding portion (10a), and when the light shielding portion (10a) performs circular motion, it passes through the sensing area of ​​the photoelectric sensing device (20) and shields light.

2. The turntable speed testing device according to claim 1, characterized in that: The light path (21) of the photoelectric sensing device (20) is perpendicular to the circular motion plane of the rotating body (10).

3. The turntable speed testing device according to claim 1, characterized in that: The photoelectric sensing device (20) comprises at least one of a through-beam photoelectric switch, a reflective photoelectric switch and a diffuse reflection photoelectric switch.

4. The turntable speed testing device according to claim 3, characterized in that: The photoelectric sensing device (20) comprises a photoelectric transmitting end (20a) and a photoelectric receiving end (20b).

5. The turntable speed testing device according to claim 4, characterized in that: The photoelectric transmitting end (20a) is connected to the power supply via a resistor; the collector of the photoelectric receiving end (20b) and the resistor are connected in series to the power supply, and the emitter thereof is connected to the base of the transistor; the collector of the transistor and the coil of the relay (30) are connected in series to the power supply, and the emitter thereof is connected to the power ground; and the relay contact is connected to the detection port of the timing device (40).

6. The turntable speed testing device according to claim 1, characterized in that: The rotating body (10) includes a cross bar.

7. The turntable speed testing device according to claim 1, characterized in that: The timing device (40) includes a stopwatch.

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