CN105388318A - Rotary table rotating speed detection method - Google Patents

Abstract

A rotary table rotating speed detection method includes the steps of: 1. adding a metal or plastic boss to a rotary table; 2. corresponding to the boss, installing a position probe which is connected with an arithmetic facility, the arithmetic facility being a DCS or PLC or time relay; and 3. detection: using the position probe to detect a boss signal, and feeding the signal into the DCS or PLC or time relay for operation. The rotary table rotating speed detection method provided by the invention solves the problem of detection of rotary table rotating speed, brings greatly benefits to an enterprise, improves the environment in the operation field at the same time, and is suitable for all production enterprises utilizing rotary table rotating speed detection.

Description

A kind of rotary speed detection method

Technical field

The present invention relates to field of measuring technique, in particular to a kind of rotary speed detection method.

Background technology

Commercial production has much rotary motion equipment, need to detect its rotating speed, the link such as installation, maintenance, buying of the various rotary speed detecting equipment of prior art is comparatively loaded down with trivial details.The requirement of rotary speed detecting equipment to on-the-spot link and the adaptation to environment have very high requirement, and this kind of rotary speed detecting equipment of what is more important costly.

Existing tachometric survey needs to be improved.In actual use, obviously there is defect exist.Improving of the above-mentioned defect of thoughts of the present invention is that spy concentrates on studies and coordinates repetition test, finally proposes a kind of reasonable in design and effectively improve the invention of above-mentioned defect.

Summary of the invention

Object of the present invention is intended to utilize cheap checkout equipment to complete rotary speed and detects and provide a kind of rotary speed detection method, detects to realize rotary speed.

Detect for realizing rotary speed, inventor, through site observation and test repeatedly, provides a kind of rotary speed detection method, comprises the steps:

1. on rotating disk, a metal or plastics boss is increased;

2. to should boss, settle a position probe, and position probe connects with arithmetic facility; Described arithmetic facility is DCS or PLC or the time relay;

3. detect: utilize position to pop one's head in and detect boss signal, and signal is sent into DCS or PLC or the time relay carries out computing.

In said method the 1st step, described boss is metal or plastics boss, requires to connect firmly with rotating disk;

In said method the 2nd step, described position probe and proximity switch, one directly contacts and manipulable position switch without the need to carrying out machinery with moving component, when the sensitive surface of object proximity proximity switch is to operating distance, do not need Mechanical Contact and apply any pressure to make switch motion, thus provide steering order to DCS, PLC or the time relay.Proximity switch is kind of a switch-type sensor, i.e. noncontacting switch, the characteristic of its existing travel switch, microswitch, there is sensing capabilities simultaneously, and reliable in action, stable performance, frequency response is fast, and application life is long, and antijamming capability waits by force and has waterproof, the feature such as shockproof, corrosion-resistant.Product has inductance type, condenser type.Pop one's head in position: corresponding metal bosses selects inductive position to pop one's head in, and corresponding plastics boss selects capacitive position to pop one's head in;

Structural representation of the present invention is as Fig. 1; In figure: 1 is rotating disk, 2 is boss, and 3 is position probe, and 4 is arithmetic facility;

In said method the 3rd step, the boss signal detected can produce the sequential chart as Fig. 2, T1 be the beginning rotating boss of rotating disk to probe detection time, T2, T4, T6, T8 are that boss detects the time left to boss of starting, and T3, T5, T7 are that boss leaves probe and detects the start time to boss.Therefore rotating disk working time (T2+T3), (T4+T5), (T6+T7).Boss detects the time starting to leave to boss and compares boss and leave probe to detect the start time to boss much little, therefore negligible.Boss detects and starts time left to boss and so on by generation rising edge and a negative edge, introduces this signal saltus step and comes can complete computing time to trigger the time relay or impulse timer action in DCS/PLC.Rotating speed T3 (second)/R, T5 (second)/R, T7 (second)/R, the time, less rotating speed was faster, otherwise the time is larger, and rotating speed is slower.

Advantage of the present invention is:

1, structure is simple: on original rotating disk, increase a metal or plastics boss, utilize the position of position probe measurement metal or plastics to detect.

2, practicality: reduce working time when rotating speed is safeguarded and installs, make measurement rotating speed become easier.

3, novelty: utilize cheap checkout equipment to complete large-sized low-speed rotating machinery velocity measuring.

The inventive method efficiently solves rotary speed test problems, brings larger benefit to enterprise, improves operation site environment simultaneously, is applicable to all manufacturing enterprises utilizing rotary speed to detect.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is the sequential chart that boss signal produces;

In Fig. 1: 1 is rotating disk, 2 is boss, and 3 is position probe, and 4 is arithmetic facility;

In Fig. 2: T1 be the beginning rotating boss of rotating disk to probe detection time, T2, T4, T6, T8 are that boss detects the time left to boss of starting, and T3, T5, T7 are that boss leaves probe and detects the start time to boss.Therefore rotating disk working time (T2+T3), (T4+T5), (T6+T7).Boss detects the time starting to leave to boss and compares boss and leave probe to detect the start time to boss much little, therefore negligible.Boss detects and starts time left to boss and so on by generation rising edge and a negative edge, introduces this signal saltus step and comes can complete computing time to trigger the time relay or impulse timer action in DCS/PLC.Rotating speed T3 (second)/R, T5 (second)/R, T7 (second)/R, the time, less rotating speed was faster, otherwise the time is larger, and rotating speed is slower.

Embodiment

embodiment:

Below in conjunction with embodiment, the present invention will be further described.

Certain factory adopts technology of the present invention to carry out Rotating speed measring to filter rotating disk in production process of phosphoric acid, concrete scheme is as follows: boss adopts metal material, be welded on outside filter rotating disk, proximity switch selects Schneider XS618B1MAL2(operating voltage: 20 ~ 264VAC/DC, environment temperature :-25 ~+70 DEG C, detecting distance: 4 ~ 6mm, response time: 10 ~ 0.4s, this proximity switch is inductance type), detection make-and-break signal is delivered to DCS system (in like manner also can deliver to PLC or the time relay).

Claims (1)

1. a rotary speed detection method, comprises the steps:

1. on rotating disk, a metal or plastics boss is increased;

2. to should boss, settle a position probe, and position probe connects with arithmetic facility; Described arithmetic facility is DCS or PLC or the time relay;

3. detect: utilize position to pop one's head in and detect boss signal, and signal is sent into DCS or PLC or the time relay carries out computing.