Method and system for detecting whether fastening bolt of roller washing machine is detached or not

A technology of a drum washing machine and a detection system, which is applied to the radio wave measurement system, the measurement device, the re-radiation of sound waves, etc., can solve the problems of complicated and cumbersome calculation, increase the cost, etc., and achieves the improvement of the safety factor, the wide application, and the avoidance of forgetting problems. Effect

Inactive Publication Date: 2013-07-10
PANASONIC HOME APPLIANCES R&D CENT HANGZHOU +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also has many disadvantages: a 3D sensor circuit must be added to the washing machine circuit, which increases the cost; the calculation is more complicated and cumbersome, etc.

Method used

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  • Method and system for detecting whether fastening bolt of roller washing machine is detached or not
  • Method and system for detecting whether fastening bolt of roller washing machine is detached or not
  • Method and system for detecting whether fastening bolt of roller washing machine is detached or not

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Embodiment Construction

[0028] From Figure 4 In the figure, it can be seen that when the motor increases from low speed to high speed, the change of the passing current is most affected by the tightening bolts. Therefore, during the design, a period of time during which the speed rises is intercepted, and the average value of the current change during this period is measured to determine whether the fastening bolts are removed. Since the change of the current passing through the motor can be reflected by the change of the motor phase value, in the program, the measured motor phase value is used to reflect the current passing through the motor. The motor phase value (duty cycle) refers to the control amount of the motor controlled by the control system when the motor rotates. It changes with the change of the current and can be reflected in RAM-Monitor in real time.

[0029] The detection method of the present invention can adopt various existing detection devices or simple and converted detection d...

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Abstract

The invention discloses a method for detecting whether a fastening bolt of a roller washing machine is detached or not, which comprises the following steps: (1) a detecting module detects a motor phase value to obtain a motor phase value B and transmits the motor phase value B to a comparing module; (2) the comparing module of a detecting system compares the motor phase value B with a motor phasevalue A in a storage module to obtain a difference value |B-A|; (3) the comparing module of the detecting system compares the difference value |B-A| with a phase value threshold XA in the storage module and converts a comparing result into a signal for being transmitted to a response module of the detecting system; and (4) the response module of the detecting system responds to the signal transmitted by the comparing module. The invention also discloses a detecting system for applying the detecting method. The detecting method disclosed by the invention is simple and effective, is easy to realize, has low application cost and completely prevents potential damage caused by forgetting to detach the fastening bolt.

Description

technical field [0001] The invention relates to a component detection of a drum washing machine, in particular to a method and system for detecting whether fastening bolts of the drum washing machine are removed, which can improve the safety performance of the drum washing machine. Background technique [0002] Drum washing machine is an emerging type of washing machine. It organically combines washing water, detergent and mechanical force, imitating the principle of hitting clothes with a mallet, and uses a motor to drive the drum to rotate. The clothes are continuously lifted and dropped in the drum, and then lifted and re- Drop off, do repetitive motions to achieve the purpose of washing clothes. [0003] The inner cylinder of the drum washing machine is suspended inside the cabinet, and is generally supported by suspension springs and lower shock absorbers. Therefore, during the transportation of the washing machine, it is necessary to install fastening bolts to fix the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/02
Inventor 肖江寿华梁陈强
Owner PANASONIC HOME APPLIANCES R&D CENT HANGZHOU
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