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Method and device for achieving return of electric lifting table when obstruction is encountered through current dual-filter mode

A lifting table and double-filtering technology, which is applied in the field of current double-filtering to realize the return of electric lifting tables in case of resistance and devices, can solve the complex manufacturing process of sensors and strain gauges, the influence of the sensitivity of system resistance and return, and the problems of sensors and strain gauges. Difficulty in installation and other issues, to achieve the effect of simple structure, low cost and high reliability

Inactive Publication Date: 2015-03-25
ZHEJIANG JIECHANG LINEAR MOTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method has two disadvantages. The first disadvantage is that in order to improve the sensitivity of retreating in case of resistance, it is necessary to use high-precision sensors or strain gauges. The manufacturing process of high-precision sensors and strain gauges is complicated and expensive.
The second disadvantage is that it is difficult to install the sensor and strain gauge. First, the installation location must be selected where the pressure can be correctly transmitted after the lifting table encounters resistance, otherwise the system’s resistance will be greatly affected; secondly, in the lifting table When the table is raised and lowered normally, it is necessary to ensure that no additional force is transmitted to the sensor or strain gauge, otherwise there will be false alarms of loading back

Method used

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  • Method and device for achieving return of electric lifting table when obstruction is encountered through current dual-filter mode
  • Method and device for achieving return of electric lifting table when obstruction is encountered through current dual-filter mode

Examples

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Embodiment 1

[0043] A method for realizing the retreat of an electric lifting table in case of resistance in a current double filtering method. The electric lifting table is lifted and lowered by the motor 1. The method includes the following steps:

[0044] Step a, obtaining the current signal flowing through the motor 1 and converting it into a voltage signal;

[0045] Step b, filtering the voltage signal;

[0046] Step c, collecting the voltage value of the voltage signal after filtering and processing, and then obtaining a comparison value;

[0047] Step d. Comparing the comparison value with the set value, making a decision to control the forward and reverse rotation of the motor 1 .

[0048] The calculation processing method in step c includes the following steps:

[0049] Step 1, collecting the voltage value of the filtered voltage signal N times to obtain N voltage values, and obtaining the sum of the N voltage values, where N>2;

[0050] Step 2. Repeat step 1 X times to obtain ...

Embodiment 2

[0056] Such as Figures 1 to 2As shown, a current dual filtering method realizes the device for the electric lifting table to fall back when encountering resistance. The electric lifting table is driven by the motor 1. The device includes a current sampling circuit 2, a signal hardware filter circuit 3, a signal amplification circuit 4 and a single-chip microcomputer 5. The motor 1 is electrically connected to the single-chip microcomputer and is controlled to work. The motor 1, the current sampling circuit 2, the signal hardware filter circuit 3, the signal amplification circuit 4, and the single-chip microcomputer are electrically connected in turn. The single-chip microcomputer has a current signal software filtering module 6 and a logic judgment module 7. The current signal software filter module 6 performs arithmetic processing on the electrical signal input by the signal amplifier circuit 4 and then sends it to the logic judgment module 7 for judgment, thereby realizing t...

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Abstract

The invention provides a method and device for achieving return of an electric lifting table when an obstruction is encountered through a current dual-filter mode. The electric lifting table is driven by a motor to be lifted. The method comprises the following steps that a, signals of currents flowing through the motor are obtained and converted into voltage signals; b, the voltage signals are filtered; c, operation is carried out on voltage values of the filtered voltage signals to obtain comparison values; d, the comparison values and set values are compared to make a decision to control forward and reverse rotation of the motor. Cost is low, reliability is high, the structure is simple, and sensitivity is adjustable.

Description

technical field [0001] The invention relates to a method and a device for realizing the retreat of an electric lifting table in case of resistance in a current double-filtering manner. Background technique [0002] The fallback function of the electric lifting table is mainly designed to prevent the top of the electric lifting table from being damaged or crushing other objects and devices during the lifting process. This design can minimize the accident caused by the lifting accident. loss and injury. The traditional electric lifting table needs to add sensors or strain gauges to the mechanism to realize the retraction of the lifting and lowering resistance. The change value of the electrical signal of the sensor or strain gauge is detected by the single-chip microcomputer to realize the load retraction. The above method has two disadvantages. The first disadvantage is that in order to improve the sensitivity of retreating in case of resistance, it is necessary to use high-...

Claims

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Application Information

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IPC IPC(8): G05D3/12A47B9/00
Inventor 陆小健杨海宇李博丁苗江
Owner ZHEJIANG JIECHANG LINEAR MOTION TECH
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