CN215628803U - Model selection device for vibration displacement sensor of washing machine - Google Patents

Abstract

The utility model relates to a type selection device of a vibration displacement sensor for a washing machine, which comprises: a cartridge assembly, a non-contact sensor, and a processor; the cylinder assembly simulates the vibration condition of the washing machine during operation, and the outer peripheral wall of the cylinder assembly is provided with a vibration test position which is used for installing a vibration displacement sensor to be selected so as to measure the vibration condition of the cylinder assembly; the accuracy of the non-contact sensor is higher than that of the vibration displacement sensor to be selected, and the non-contact sensor is used for measuring the vibration condition of the vibration displacement sensor to be selected; and the processor is electrically connected with the vibration displacement sensor to be selected and the non-contact sensor respectively, can compare the difference value between the measurement data acquired by the vibration displacement sensor to be selected and the monitoring data acquired by the non-contact sensor, and further replace the vibration displacement sensors to be selected of different models for measurement, so that the vibration displacement sensor to be selected with higher precision at the same price can be judged quickly, and the research and development time is shortened.

Description

Model selection device for vibration displacement sensor of washing machine

Technical Field

The utility model relates to the technical field of measuring instruments, in particular to a model selection device of a vibration displacement sensor for a washing machine.

Background

There are many displacement sensors in industry which are fixed on the object to be vibrated to measure the vibration of the vibrating object. And then can be according to the vibration condition of vibration object, through the running state that the controller changes the testee, the vibration of better control object.

For example, in order to improve the vibration control level of the washing machine, many high-end products are equipped with displacement sensors, when the washing machine vibrates during operation, the displacement sensors detect the change of the acceleration of the washing machine, the change information is transmitted to a processing chip, and the processing chip transmits a command to an engine to adjust the rotating speed, so that the vibration is reduced to the minimum. However, since the vibration displacement sensor is attached to the surface of the washing machine, some measurement errors inevitably occur in the case of low-frequency vibration. Therefore, in the development stage of the washing machine, how to quickly select a displacement sensor with higher precision from different types of vibration displacement sensors is very important for shortening the production cycle of the washing machine.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a type selection device for a vibration displacement sensor of a washing machine, which is used for quickly selecting a displacement sensor with higher precision and quickening the research and development time.

In order to solve the technical problems, the utility model adopts the following technical scheme.

According to an aspect of the present invention, there is provided a model selection device for a vibratory displacement sensor of a washing machine, including: the cylinder assembly is used for simulating the vibration condition of the washing machine during operation, and a vibration test position is arranged on the outer peripheral wall of the cylinder assembly; the vibration testing position is used for mounting a vibration displacement sensor to be selected so as to measure the vibration condition of the cylinder assembly; the accuracy of the non-contact sensor is higher than that of the vibration displacement sensor to be selected, and the non-contact sensor is opposite to the vibration displacement sensor to be selected at intervals so as to measure the vibration condition of the vibration displacement sensor to be selected; and the processor is electrically connected with the vibration displacement sensor to be selected and the non-contact sensor respectively, and can compare a difference value between measurement data acquired by the vibration displacement sensor to be selected and monitoring data acquired by the non-contact sensor.

In some embodiments of the present application, the model selection device for a vibration displacement sensor of a washing machine further includes a motor; the cartridge assembly comprises an inner cartridge body and an outer cartridge body; the inner cylinder body is rotatably arranged in the outer cylinder body, and an output shaft of the motor is in transmission connection with the inner cylinder body so as to drive the inner cylinder body to rotate; the vibration generated when the inner cylinder rotates can be transmitted to the outer cylinder; the vibration test position is arranged on the peripheral wall of the outer cylinder body.

In some embodiments of the present application, the cartridge assembly further comprises an eccentric mass; the eccentric block is fixed on the inner side wall of the inner cylinder body; when the inner cylinder rotates, the eccentric block can strengthen the vibration generated by the rotation of the inner cylinder.

In some embodiments of the present application, the motor is disposed at one axial end of the outer cylinder, and an output shaft of the motor extends into the outer cylinder and is connected with the inner cylinder; the vibration test position is arranged at one end, far away from the motor, of the outer cylinder body peripheral wall.

In some embodiments of the present application, the model selection device for a displacement sensor of a washing machine further includes a housing; the cylinder assembly is arranged in the machine shell, and the axis direction of the cylinder assembly is horizontally arranged; the vibration testing position is arranged at the top of the outer peripheral wall of the cylinder assembly; the non-contact sensors are arranged right above the vibration testing position at intervals.

In some embodiments of the present application, the type selecting apparatus for a displacement sensor of a washing machine further includes a bracket; the non-contact sensor is fixed right above the vibration test position through the bracket; the support is of an up-down telescopic structure so as to adjust the distance between the non-contact sensor and the vibration testing position.

In some embodiments of the present application, the model selection device for a displacement sensor of a washing machine further includes an installation station; the casing is detachably fixed on the mounting station.

In some embodiments of the present application, the processor comprises a display module and a storage module; the display module is used for displaying the measurement data and the monitoring data and displaying the difference value of the measurement data and the monitoring data; the storage module is used for storing the measurement data and the monitoring data and storing the difference value of the measurement data and the monitoring data.

In some embodiments of the present application, the non-contact sensor is a laser displacement sensor.

In some embodiments of the present application, the laser displacement sensor has a signal amplifier; the signal amplifier is respectively in telecommunication connection with the laser displacement sensor and the processor; the signal amplifier is used for amplifying the monitoring signal acquired by the laser displacement sensor; the processor can convert the monitoring signal amplified by the signal amplifier into monitoring data; the signal amplifier is arranged in the laser displacement sensor.

According to the technical scheme, the embodiment of the utility model at least has the following advantages and positive effects:

the type selection device for the vibration displacement sensor of the washing machine, disclosed by the embodiment of the utility model, utilizes the barrel assembly to simulate the vibration condition of the washing machine during operation. The vibration displacement sensor to be selected is fixed on the vibration testing position of the cylinder assembly, so that the vibration condition of the cylinder assembly can be measured, and the vibration displacement sensor to be selected can vibrate synchronously along with the cylinder assembly. The non-contact sensor is utilized to face the vibration displacement sensor to be selected, so that the vibration condition of the vibration displacement sensor to be selected can be measured, namely the vibration condition of the cylinder assembly can be indirectly measured. And the accuracy of the non-contact sensor is higher than that of the vibration displacement sensor to be selected, so that the more accurate vibration condition of the cylinder assembly can be obtained. And receiving the measurement data of the vibration displacement sensor to be selected and the monitoring data of the non-contact sensor by using the processor, and comparing the difference value of the measurement data and the monitoring data, so that the measurement error of the vibration displacement sensor to be selected can be obtained. And the vibration displacement sensors to be selected of different models are further replaced for measurement, so that the vibration displacement sensors to be selected with higher precision at the same price can be quickly judged, the research and development time is shortened, and the research and development cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a model selection device for a vibration displacement sensor of a washing machine according to an embodiment of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 at another angle.

Fig. 3 is a schematic diagram of the connection of the vibratory displacement sensor, the non-contact sensor, and the processor of fig. 1.

The reference numerals are explained below: 1. a vibrating device; 11. a housing; 12. a motor; 13. a cartridge assembly; 131. an inner cylinder; 132. an outer cylinder; 1321. vibrating the test site; 14. a door body; 141. sealing the door; 142. a main body; 15. an eccentric block; 16. a shock absorber; 17. footing; 18. a spring; 2. a non-contact sensor; 3. a processor; 4. a vibration displacement sensor; 5. a first communication interface; 6. a second communication interface; 7. and (6) installing a station.

Detailed Description

Exemplary embodiments that embody features and advantages of the utility model are described in detail below in the specification. It is to be understood that the utility model is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the utility model and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

There are many displacement sensors in industry which are fixed on the object to be vibrated to measure the vibration of the vibrating object. And then can be according to the vibration condition of vibration object, through the running state that the controller changes the testee, the vibration of better control object.

For example, in order to improve the vibration control level of the washing machine, many high-end products are equipped with displacement sensors, when the washing machine vibrates during operation, the displacement sensors detect the change of the acceleration of the washing machine, the change information is transmitted to a processing chip, and the processing chip transmits a command to an engine to adjust the rotating speed, so that the vibration is reduced to the minimum. However, since the vibration displacement sensor is attached to the surface of the washing machine, some measurement errors inevitably occur in the case of low-frequency vibration. Therefore, in the development stage of the washing machine, how to quickly select a displacement sensor with higher precision from different types of vibration displacement sensors is very important for shortening the production cycle of the washing machine.

Fig. 1 is a schematic structural diagram of a model selection device for a vibration displacement sensor of a washing machine according to an embodiment of the present invention. Fig. 2 is a schematic view of the structure of fig. 1 at another angle.

Referring to fig. 1 to 2, an embodiment of a model selection device includes a vibration device 1, a non-contact sensor 2, and a processor 3.

The vibration device 1 is used for simulating the vibration condition of a vibrating object, for example, simulating the vibration condition of a washing machine during operation. The vibration displacement sensor 4 can be fixed on the surface of the vibrating object for measuring the vibration condition of the vibrating object. And the vibration displacement sensor 4 with the highest measurement precision at the same price is selected by comparing the measurement errors of a plurality of vibration displacement sensors 4 with different models to be selected.

The non-contact sensor 2 is spaced directly against the surface of the vibrating object for more accurately measuring the vibration of the vibrating object. Through comparing the measured data of the non-contact sensor 2 with the measured data of the vibration displacement sensors 4 to be selected in different models, the vibration displacement sensor 4 with the highest measurement precision in the same price can be conveniently selected.

The processor 3 is electrically connected with the vibration displacement sensor 4 and the non-contact sensor 2 respectively to receive the measurement data acquired by the vibration displacement sensor 4 and the monitoring data acquired by the non-contact sensor 2. And the processor 3 can automatically compare the difference between the measured data and the monitored data, so that the measurement error of the vibration displacement sensor 4 to be selected can be obtained quickly.

For example, for measuring vibrations generated during operation of the washing machine. Since the vibration displacement sensor 4 is attached to the surface of the washing machine, some measurement errors inevitably occur in the case of low-frequency vibration. Since the non-contact sensor 2 does not need to be attached to the surface of the washing machine, the non-contact sensor 2 can more accurately measure the vibration of the washing machine than the vibration displacement sensor 4. Therefore, the measuring error of the vibration displacement sensor 4 used on the washing machine can be obtained, and the vibration displacement sensor 4 with different models is replaced to measure, so that the vibration displacement sensor 4 with the highest precision used on the washing machine at the same price can be found, the vibration control level of the washing machine is improved, and the vibration of the washing machine is reduced.

It is understood that the alternative vibration displacement sensor 4 may be a contact type displacement sensor such as an acceleration displacement sensor, a magnetostrictive displacement sensor, and a pull-rope type displacement sensor. Such sensors are characterized by the need to contact the vibrating object to measure the vibration of the vibrating object.

The non-contact sensor 2 may be a laser displacement sensor, a hall displacement sensor, an ultrasonic displacement sensor, or other non-contact displacement sensors. Such sensors are characterized by the ability to measure the vibration of a vibrating object without the need to touch the object. Therefore, the vibration data measured by the proximity sensor 2 is not affected by the vibration of the vibrating object, and the vibration of the vibrating object can be accurately measured even in the case of low-frequency vibration.

Still referring to fig. 1 and 2, the vibration device 1 has a structure substantially identical to that of a corresponding model of washing machine so as to simulate the vibration condition of the model of washing machine. The vibration device 1 mainly comprises a machine shell 11, a motor 12, a cylinder assembly 13, a door body 14, an eccentric block 15, a shock absorber 16 and a bottom foot 17.

It should be noted that the vibration device 1 may also be directly replaced by an existing washing machine of a corresponding type.

The housing 11 has a rectangular parallelepiped shape, and the housing 11 is used to provide an installation position or an installation space for the motor 12, the cartridge assembly 13, the door 14, the eccentric mass 15, the damper 16, and the foot 17.

The top cover of the housing 11 is a detachable structure to facilitate installation of the motor 12, the cartridge assembly 13, and the damper 16 inside the housing 11.

It should be noted that, the top covers of most washing machines on the market are fixed on the integral top through screws, so the top covers of the washing machines are detachable.

A motor 12 is provided within the cabinet 11 for driving the drum assembly 13 to rotate, thereby simulating a vibration condition of the washing machine during operation.

The barrel assembly 13 is arranged in the machine shell 11, and the barrel assembly 13 is in transmission connection with an output shaft of the motor 12 and is driven by the motor 12 to rotate.

The cylinder assembly 13 includes an inner cylinder 131 and an outer cylinder 132, both the inner cylinder 131 and the outer cylinder 132 are in an open structure at one axial end, the inner cylinder 131 is rotatably disposed in the outer cylinder 132, the openings of the inner cylinder 131 and the outer cylinder 132 are located at the same end, and the axes of the inner cylinder 131 and the outer cylinder 132 are overlapped. The inner cylinder 131 is in transmission connection with an output shaft of the motor 12 and rotates around its own axis under the driving of the motor 12. Further, when the motor 12 is operated, the inner cylinder 131 is continuously rotated and can transmit vibration generated during rotation to the outer cylinder 132.

In some embodiments, the outer circumferential wall of the outer cylinder 132 is provided with a vibration test site 1321, the vibration displacement sensor 4 is arranged on the vibration test site 1321, the vibration displacement sensor 4 can measure the vibration of the outer cylinder 132, and the vibration displacement sensor 4 vibrates synchronously with the outer cylinder 132. The noncontact sensor 2 with higher accuracy is selected, and the position of the noncontact sensor 2 is adjusted so that the noncontact sensor 2 faces the vibration displacement sensor 4 at an interval, and the vibration condition of the vibration displacement sensor 4 to be selected, that is, the vibration condition of the outer cylinder 132 can be indirectly measured. And the precision of the non-contact sensor 2 is higher than that of the vibration displacement sensor 4, so that the vibration condition of the outer cylinder 132 can be measured more accurately, and the measurement error of the vibration displacement sensor 4 to be selected can be obtained.

In some embodiments, the vibration displacement sensor 4 is detachably fixed to the vibration test site 1321 by clamping, adhering, screwing, and the like. After the measuring error of the vibration displacement sensor 4 to be selected is tested, the vibration displacement sensor 4 to be selected of other models can be conveniently replaced to measure, so that the vibration displacement sensor 4 with higher precision under the same price can be rapidly judged, the research and development time is shortened, and the research and development cost is reduced.

In some embodiments, the motor 12 is disposed at an end of the outer cylinder 132 facing away from the opening of the outer cylinder 132, and an output shaft of the motor 12 extends into the outer cylinder 132 and is connected to the inner cylinder 131. The vibration test bit 1321 is arranged at one end, far away from the motor 12, of the outer circumferential wall of the outer cylinder 132, so that the vibration test bit 1321 is the position, with the largest vibration amplitude, of the outer cylinder 132, and further the measurement data obtained by the vibration displacement sensor 4 and the non-contact sensor 2 is larger, so that the measurement deviation of the vibration displacement sensor 4 to be selected is larger, and the measurement error of the vibration displacement sensor 4 to be selected is judged more obviously.

In some embodiments, the axial directions of the inner cylinder 131 and the outer cylinder 132 are horizontally arranged in the housing 11, the vibration test site 1321 is provided at the top of the outer circumferential wall of the outer cylinder 132, and the vibration displacement sensor 4 is also provided at the top of the outer circumferential wall of the outer cylinder 132, so that the non-contact sensor 2 can be spaced right above the vibration displacement sensor 4 for measurement. When the non-contact sensor 2 measures, a certain distance needs to be reserved between the non-contact sensor 2 and the vibration displacement sensor 4, if the vibration displacement sensor 4 is arranged on the side surface of the outer peripheral wall of the outer cylinder 132, and the outer cylinder 132 is arranged in the casing 11, the outer peripheral wall of the outer cylinder 132 needs to be spaced from the side wall of the casing 11 by a certain distance, so that the non-contact sensor 2 can be installed in the casing 11, the casing 11 needs to have a larger size, the space is wasted, and the non-contact sensor 2 is not convenient to install. And the vibration displacement sensor 4 that will await the selection locates the top of the periphery wall of outer barrel 132, and the top that utilizes casing 11 is detachable structure to need not install non-contact sensor 2 inside casing 11, do not occupy the inside space of casing 11, be favorable to reducing the space that vibrating device 1 occupy.

It can be understood that the top cover of the washing machine is also detachable, and the measurement error of the displacement sensor in the washing machine can be judged by comparing the measurement condition of the displacement sensor in the washing machine with the measurement condition of the non-contact sensor 2 by installing the displacement sensor in the washing machine on the top of the outer cylinder 132 and fixing the non-contact sensor 2 right above the displacement sensor in the washing machine. Through this mode, can carry out quality control to the displacement sensor of the washing machine in the production line.

An eccentric mass 15 is provided in the drum assembly 13 for reinforcing vibration generated from the drum assembly 13 and simulating vibration generated when laundry is washed.

The eccentric mass 15 is detachably fixed to the inner sidewall of the inner cylinder 131. When the eccentric mass 15 is fixed to the inner sidewall of the inner cylinder 131, the center of gravity of the inner cylinder 131 is deviated from the axis of the inner cylinder 131, increasing the amplitude of vibration generated when the inner cylinder 131 rotates.

It can be understood that, when the washing machine washes laundry, the laundry is entangled in the inner cylinder 131 as the inner cylinder 131 rotates, such that the center of gravity of the inner cylinder 131 is offset from the rotation axis. Therefore, the eccentric mass 15 is placed in the inner cylinder 131, i.e., simulating the washing process of the washing machine.

In some embodiments, the vibration device 1 is provided with eccentric masses 15 of various specifications, and different weights of eccentric masses 15 are fixed on the inner side wall of the inner cylinder 131 to simulate the vibration of the washing machine when washing different weights of clothes.

In some embodiments, the eccentric block 15 is fixed on the inner sidewall of the inner cylinder 131 by a magnetic attraction manner, so as to facilitate quick detachment.

The door 14 is hinged on the machine shell 11, and the door 14 is used for closing the cylinder assembly 13.

The door 14 includes a door seal 141 and a main body 142, and the door seal 141 faces the opening of the inner cylinder 131 and communicates the inner cylinder 131 with the outside of the cabinet 11. Main part 142 articulates on casing 11, and main part 142 can be through rotating the laminating in door seal 141, makes interior barrel 131 form a confined space, and barrel 131 when rotating at the excessive speed including barrel 131, barrel 131 causes the injury to the development personnel in the eccentric block 15 departure in preventing interior barrel 131.

A plurality of dampers 16 are provided, one end of the damper 16 is connected to an inner sidewall of the cabinet 11, and the other end of the damper 16 is connected to an outer circumferential wall of the cartridge assembly 13, so as to reduce vibration of the cartridge assembly 13, simulating a damping system in the washing machine. The damper 16 is also replaced with a spring 18 to reduce cost.

The feet 17 are provided below the housing 11 to stably support the housing 11 and reduce vibration of the housing 11 caused by vibration.

In some embodiments, the foot 17 is detachably fixed on the mounting station 7, so as to prevent the vibration frequency of the vibration device 1 from being close to the natural frequency of the vibration device 1, which may cause the vibration device 1 to resonate strongly, resulting in the non-contact sensor deviating from the vibration displacement sensor 4 and failing to measure the vibration condition of the vibration displacement sensor 4. In addition, the vibration device 1 can be detached after the measurement is completed, and the occupied space is avoided.

In some embodiments, the non-contact sensor 2 is fixed using a bracket to facilitate movement of the non-contact sensor 2 and to quickly adjust the position of the non-contact sensor 2 so that the non-contact sensor 2 is facing the vibrating object. Meanwhile, the non-contact sensor 2 can be moved to an appropriate position according to the effective measurement distance and the optimum measurement distance of the non-contact sensor 2.

It can be understood that when the vibration object needs to be measured for multiple times, the non-contact sensor 2 can be fixed on the wall, so that the condition that the support fixing mode is easy to be knocked over by research personnel is avoided.

In some embodiments, the holder has a telescopic structure up and down, allowing a greater range of adjustment of the position of the non-contact sensor 2.

In some embodiments, the processor 3 includes a display module for displaying the measurement data and the monitoring data, and displaying a difference between the measurement data and the monitoring data, so as to visually display a measurement error of the selected vibration displacement sensor 4.

In some embodiments, the processor 3 further comprises a storage module for storing the measurement data and the monitoring data and capable of storing a difference between the measurement data and the monitoring data to facilitate viewing of the test record.

Fig. 3 is a schematic diagram of the connection of the vibratory displacement sensor, the non-contact sensor, and the processor of fig. 1.

Referring to fig. 3, in some embodiments, the vibration displacement sensor 4 to be selected is an acceleration displacement sensor, and the non-contact sensor 2 is a laser displacement sensor.

The acceleration displacement sensor is arranged on the outer peripheral wall of the cylinder assembly 13, acceleration is generated when the cylinder assembly 13 vibrates, so that a sensing element inside the acceleration displacement sensor 5 is deformed, and the acquired signal can be directly converted into measurement data to be output by measuring the deformation and filtering and integrating the measurement data through an internal processing module, so that the acceleration displacement sensor 5 can be fixed on the outer peripheral wall of the cylinder assembly 13 to measure the vibration condition of the cylinder assembly 13.

The acceleration displacement sensor is powered by a first power supply and transmits measurement data to the processor 3 via a first communication interface 5. It can be understood that, in the washing machine complete machine provided with the acceleration displacement sensor, the first power supply does not need to be arranged independently, and the power supply is directly carried out through the circuit in the washing machine.

The laser displacement sensor is a sensor for measuring by using a laser technology, and can accurately measure the changes of the position, the displacement and the like of a measured object. The laser displacement sensor can measure the vibration condition of the acceleration displacement sensor by using the light beam.

The laser displacement sensor has a signal amplifier. The signal amplifier is in telecommunication connection with the laser displacement sensor. The signal amplifier is used for amplifying the monitoring signal acquired by the laser displacement sensor. The signal amplifier is arranged in the laser displacement sensor, so that the structure of the laser displacement sensor is more compact, and the space occupied by the model selection device is reduced.

The laser displacement sensor is powered by a second power supply, and transmits a monitoring signal amplified by the signal amplifier to the processor 3 through the second communication interface 6, and the monitoring signal is converted into monitoring data by analysis software in the processor 3.

It should be noted that, because the acceleration displacement sensor itself has a large error, some data will be inevitably lost when processing the collected signals, especially when processing low-frequency signals within 5 Hz. Therefore, the monitoring data of the laser displacement sensor can be compared with the measurement data measured by the acceleration displacement sensor, and the control program of the washing machine can be adjusted in a targeted manner, so that the washing machine can more accurately control the rotating speed of the motor 12 according to the debugged control program, the vibration of the washing machine is reduced, and the measurement error generated by the acceleration displacement sensor is indirectly calibrated.

Based on the technical scheme, the embodiment of the utility model at least has the following advantages and positive effects.

The model selection device for the vibration displacement sensor of the washing machine of the embodiment of the utility model utilizes the barrel assembly 13 to simulate the vibration condition of the washing machine during operation. The selected vibratory displacement sensor 4 is fixed to the vibration test site 1321 of the cartridge assembly 13, so that the vibration condition of the cartridge assembly 13 can be measured, and the selected vibratory displacement sensor 4 can vibrate synchronously with the cartridge assembly 13. The non-contact sensor 2 is used for aligning the vibration displacement sensor 4 to be selected, so that the vibration condition of the vibration displacement sensor 4 to be selected can be measured, namely the vibration condition of the cylinder assembly 13 can be indirectly measured. And the accuracy of the non-contact sensor 2 is higher than that of the vibration displacement sensor 4 to be selected, so that the more accurate vibration condition of the cylinder assembly 13 can be obtained. The processor 3 is used for receiving the measurement data of the vibration displacement sensor 4 to be selected and the monitoring data of the non-contact sensor 2, and comparing the difference value of the measurement data and the monitoring data, so that the measurement error of the vibration displacement sensor 4 to be selected can be obtained. And the vibration displacement sensors 4 to be selected of different models are further replaced for measurement, so that the vibration displacement sensors 4 to be selected with higher precision at the same price can be quickly judged, the research and development time is shortened, and the research and development cost is reduced.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A type selection device for a vibratory displacement sensor of a washing machine, comprising:

the cylinder assembly is used for simulating the vibration condition of the washing machine during operation, and a vibration test position is arranged on the outer peripheral wall of the cylinder assembly; the vibration testing position is used for mounting a vibration displacement sensor to be selected so as to measure the vibration condition of the cylinder assembly;

the accuracy of the non-contact sensor is higher than that of the vibration displacement sensor to be selected, and the non-contact sensor is opposite to the vibration displacement sensor to be selected at intervals so as to measure the vibration condition of the vibration displacement sensor to be selected; and

and the processor is electrically connected with the vibration displacement sensor to be selected and the non-contact sensor respectively, and can compare a difference value between the measurement data acquired by the vibration displacement sensor to be selected and the monitoring data acquired by the non-contact sensor.

2. The type selection device for a vibratory displacement sensor of a washing machine as claimed in claim 1, wherein the type selection device for a vibratory displacement sensor of a washing machine further comprises a motor;

the cartridge assembly comprises an inner cartridge body and an outer cartridge body; the inner cylinder body is rotatably arranged in the outer cylinder body, and an output shaft of the motor is in transmission connection with the inner cylinder body so as to drive the inner cylinder body to rotate; the vibration generated when the inner cylinder rotates can be transmitted to the outer cylinder;

the vibration test position is arranged on the peripheral wall of the outer cylinder body.

3. The type selection device for a vibratory displacement sensor of a washing machine as recited in claim 2 wherein said cartridge assembly further comprises an eccentric mass;

the eccentric block is detachably fixed on the inner side wall of the inner cylinder body; when the inner cylinder rotates, the eccentric block can strengthen the vibration generated by the rotation of the inner cylinder.

4. The type selection device of a vibratory displacement sensor for a washing machine as claimed in claim 2 wherein said motor is provided at one axial end of said outer cylinder,

an output shaft of the motor extends into the outer cylinder body and is connected with the inner cylinder body;

the vibration test position is arranged at one end, far away from the motor, of the outer cylinder body peripheral wall.

5. The type selection device for a vibratory displacement sensor of a washing machine as claimed in claim 1, wherein the type selection device for a displacement sensor of a washing machine further comprises a cabinet;

the cylinder assembly is arranged in the machine shell, and the axis direction of the cylinder assembly is horizontally arranged; the vibration testing position is arranged at the top of the outer peripheral wall of the cylinder assembly;

the non-contact sensor is arranged right above the vibration testing position at intervals.

6. The type selection device for a vibratory displacement sensor of a washing machine as claimed in claim 5, wherein the type selection device for a displacement sensor of a washing machine further comprises a bracket; the non-contact sensor is fixed right above the vibration test position through the bracket;

the support is of an up-down telescopic structure so as to adjust the distance between the non-contact sensor and the vibration testing position.

7. The type selection device for a vibratory displacement sensor of a washing machine as set forth in claim 6, wherein the type selection device for a displacement sensor of a washing machine further comprises a mounting station; the casing is detachably fixed on the mounting station.

8. The type selection device of a vibratory displacement sensor for a washing machine as claimed in claim 1 wherein the processor comprises a display module and a storage module;

the display module is used for displaying the measurement data and the monitoring data and displaying the difference value of the measurement data and the monitoring data;

the storage module is used for storing the measurement data and the monitoring data and storing the difference value of the measurement data and the monitoring data.

9. The type selection device for a vibratory displacement sensor of a washing machine as claimed in claim 1 wherein the non-contact sensor is a laser displacement sensor.

10. The type selection device of a vibratory displacement sensor for a washing machine as claimed in claim 9 wherein the laser displacement sensor has a signal amplifier; the signal amplifier is respectively in telecommunication connection with the laser displacement sensor and the processor;

the signal amplifier is used for amplifying the monitoring signal acquired by the laser displacement sensor;

the processor can convert the monitoring signal amplified by the signal amplifier into monitoring data;

the signal amplifier is arranged in the laser displacement sensor.

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