CN206832834U - A kind of rotation-speed measuring device - Google Patents

Abstract

The utility model provides a rotational speed measuring device, which solves the technical problem that the existing stroboscopic speedometer cannot perform low speed measurement, and comprises a stroboscopic speedometer and an RFID reader. The panel and handle, the main circuit board is arranged in the housing, the flashlight and the operation panel are respectively connected to the main circuit board; the RFID reader is connected to the housing, and the RFID reader includes an antenna, a control module, a storage module, a power supply module, and a reading and writing module And the interface module, the read-write module is connected with the control module, the antenna is connected with the read-write module, the storage module is connected with the control module, the power supply module is connected with the control module, the interface module is connected with the control module; the interface module of the RFID reader is connected with the strobe speed measurement The main circuit board of the instrument is connected; the utility model can be widely used in the speed measurement of rotating equipment such as vehicle hubs, rotating motors, and fan blades.

Description

A speed measuring device

technical field

The utility model relates to the technical field of rotational speed measurement in electric power systems, in particular to a rotational speed measurement device.

Background technique

In the field of power system technology, it is necessary to measure the rotating speed of the equipment's rotating motor, impeller, fan, and generator set.

The stroboscopic speedometer is a commonly used speed measuring device. When the stroboscopic speedometer is used for low-speed measurement below 300r/min, the stroboscopic effect becomes worse, and a fixed image cannot be formed, resulting in inaccurate measurement. Therefore, the stroboscopic speedometer cannot be used. in low speed measurements.

Contents of the invention

The purpose of the utility model is to solve the technical problem that the existing stroboscopic velocimeter cannot measure the low speed, and provide a speed measuring device which can satisfy both the low speed and the high speed measurement.

The technical scheme that the utility model solves its technical problem adopts is:

A speed measurement device is provided, including a strobe speedometer and an RFID reader. The strobe speedometer includes a flashlight, a housing, an operation panel and a handle, and a main circuit board is arranged in the housing, and the flashlight and the operation panel are respectively connected to the main circuit board ;

The RFID reader is connected to the housing. The RFID reader includes an antenna, a control module, a storage module, a power supply module, a read-write module and an interface module. The read-write module is connected to the control module, the antenna is connected to the read-write module, and the storage module is connected to the control module. Module connection, the power module is connected to the control module, and the interface module is connected to the control module;

The interface module of the RFID reader is connected with the main circuit board of the stroboscope.

Preferably, the main circuit board is connected to a host computer through a communication interface module.

The utility model has the following advantages due to the adoption of the above structure:

Realize non-contact speed measurement, and conduct two different measurement methods for low speed and high speed to ensure the accuracy of measurement. When the RFID reader is used for low-speed measurement below 300r/min, it is easy to use, accurate in measurement, and can also save energy (the flashlight of the stroboscopic speedometer consumes a lot of power).

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a functional block diagram of the circuit part of the utility model.

Reference signs: 1. Flashlight, 2. Housing, 3. Operation panel, 4. Handle, 5. Main circuit board, 6. RFID reader, 6-1. Antenna, 6-2. Control module, 6-3 .Storage module, 6-4. Power supply module, 6-5. Interface module, 6-6. Read-write module, 7. Passive RFID tag, 8. Fan.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described.

As shown in Figures 1 and 2, the rotational speed measurement device includes a stroboscope and an RFID reader. The stroboscopic speedometer includes a flashlight 1 , a casing 2 , an operation panel 3 and a handle 4 , the flashlight 1 is connected to the front end of the casing 2 , and the operation panel 3 is connected to the tail end of the casing 2 . The housing 2 is provided with a main circuit board 5 , and the flashlight 1 and the operation panel 3 are respectively connected to the main circuit board 5 .

The RFID reader 6 is installed on the casing 2, close to the flashlight 1. RFID reader includes antenna 6-1, control module 6-2, storage module 6-3, power supply module 6-4, read-write module 6-6 and interface module 6-5, read-write module 6-6 and control module 6 -2 connection, the antenna 6-1 is connected with the read-write module 6-6, the storage module 6-3 is connected with the control module 6-2, the power supply module 6-4 is connected with the control module 6-2, and the interface module 6-5 is connected with the control module Module 6-2 Connections.

The interface module 6-5 of the RFID reader 6 is connected with the operation processing module on the main circuit board 5 in the stroboscopic speedometer, and the main circuit board in the stroboscopic speedometer is connected with the upper computer through the communication interface module. After the upper computer receives the rotational speed data, it makes the display screen display different rotational speed values in different colors. The upper computer can also use the software to display graphics representing the rotational speed. Different graphics represent different rotational speeds. The graphics can be printed on plastic, paper, cards and other media.

When the utility model is in use, the RFID reader 6 is used to measure the rotating speed below 300r/min, and the stroboscopic velocimeter is used to measure the high speed above 300r/min. Taking the rotating speed of the fan as an example, the working process of the present utility model is illustrated. :

A passive RFID tag 7 is pasted on the blade of the fan 8 so that the direction of the electromagnetic wave emitted by the antenna 6 - 1 of the RFID reader 6 is perpendicular to the rotating end face of the fan 8 .

The distance between the RFID reader 6 and the passive RFID tag is 16 cm. When the fan 8 rotates at a speed below 300r/min, the passive RFID tag 7 rotates synchronously with the fan, and the antenna 6-1 on the RFID reader 6 projects electromagnetic waves onto the passive RFID tag 7, and the passive RFID tag 7 follows a certain The cycle continuous feedback signal to the RFID reader 6. The control module 6-2 in the RFID reader 6 sends the received data to the main circuit board 5, and the arithmetic processing module on the main circuit board 5 calculates the fan according to the number of times the RFID reader 6 receives the feedback signal per unit time. actual rotational speed. For example, the calculation can be performed according to the calculation method disclosed in the prior art with the authorization announcement number CN103063863B.

When the rotating speed of the fan 8 exceeds 300r/min, the RFID reader 6 is turned off, and the running stroboscopic speedometer is turned on for measurement.

The utility model can be applied to equipment and facilities such as vehicle hubs, rotating electrical machines, fan blades and the like.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes.

Claims (2)

1. a kind of rotation-speed measuring device, it is characterized in that, including stroboscopic tachymeter and RFID reader, the stroboscopic tachymeter include Flash lamp, housing, guidance panel and handle, are provided with main circuit board in the housing, the flash lamp, guidance panel respectively with master Circuit board connects；

The RFID reader is connected on housing, and the RFID reader includes antenna, control module, memory module, power supply Module, module for reading and writing and interface module, the module for reading and writing are connected with control module, and antenna is connected with module for reading and writing, store mould Block is connected with control module, and power module is connected with control module, and interface module is connected with control module；

The interface module of the RFID reader is connected with the main circuit board of stroboscopic tachymeter.

2. rotation-speed measuring device according to claim 1, it is characterised in that the main circuit board passes through communication interface module It is connected with host computer.