Notes

Technique for early diagnosis of load cell "sub-health".<br>
[ load cell for platform ] This article presents a principle and method of exact and early diagnosis of the "sub-health" problem of load cells.

[Keyword phrases] early; medical diagnosis; "sub-health"; tons cell; technique.

I. Intro.

With the continual deepening of business technical transformation, digital weighing tools have been utilized a growing number of commonly in procedure circulation, process control, as well as settlement as well as dimension. The resistance pressure kind lots cell (hereinafter referred to as the sensing unit) is a sort of metal flexible body as the pressure.

- Gauging instruments with electric conversion feature, and sensing units are the core parts of digital considering tools. Due to the intrinsic characteristics of the sensing unit itself.

As well as in a complicated and also severe atmosphere, its failures are defined by diversity and intricacy, and the failure price is likewise higher. Present.

Replacing the sensing unit in the area judgment will certainly not only affect the normal manufacturing rhythm, but also trigger the wind, the furnace, the malfunctioning product and the failing to determine.

The quantity, and so on, seriously impact the financial advantages of the venture. Maintenance personnel really hope that there is a means to progress the sensing unit failing.

Get advised.

After years of expedition, there is a way to accurately detect whether the tons cell misbehaves or not (abbreviated as.

" Sub-health") to enhance the effort of maintenance and also achieve the purpose of "absolutely no failure" upkeep.

2. Concepts and phenomena.

The tons cell entails disciplines such as technicians, electrical power, as well as chemistry. The reason of the fault is made complex and it is tough to court. Development in failing.

It is certainly difficult to diagnose beforehand that the lots cell remains in a "sub-healthy" problem.

The faults of the tons cell can be divided into 3 categories according to the concept: A, triggered by elastic body; B, triggered by electric shock and circuit.

的; C, created by the pasting process. Yet regardless of what type of failings will certainly be shown with the out of balance outcome.

The size of the zero factor output of the load cell is a representation of the top quality of the production process and also the quality of the style, and it is likewise a possible failure.

One of one of the most noticeable symptoms.

The no point outcome of the lots cell is too large, which positions a possible threat to the reliability of the sensor. The modification of absolutely no point will certainly likewise make.

The security of the sensor is not guaranteed. It is located that the zero factor is too large throughout usage, which need to be triggered by a breakdown. The long-lasting security of the zero factor of the load cell is a prerequisite technical index in the reliability and also security of the sensing unit. These are the conclusive understandings of the failing of the load cell during years of job. On this basis, after exploration, it is found that the empty scale result and no-load output signal changes of the tons cell. Using surveillance, evaluation, and also tracking techniques, it is possible to comprehend the pulse of the "health and wellness" of the lots cell, from the "change quantity". "Early as well as exact diagnosis of the "health" condition of the sensing unit. At the very same time, it additionally discusses the outcome of the empty range. The modification of the output of the vacant range is a concentrated representation of two crucial technological signs of the tons cell zero point and also linearity.

The load cell is in the "sub-healthy" condition. One of these phenomena shows that there are "sub-healthy" sensors in the scale.

1. Monitoring.

( 1) Surveillance of vacant ranges with load cells. Under actual weighing problems, the load-bearing device evaluates the body (or load-bearing considering.

The structure) remains in area, and the mechanical components are in place. Step the output value of each sensing unit of the range under the excitation voltage, and modify it by setting.

Good number, make a great document. This is the outcome worth of the sensing unit's vacant range.

( 2) No-load monitoring of the tons cell. Under actual weighing conditions, put each sensing unit of the scale.

No-load state, measure the output value of each sensor under the excitation voltage, code the number according to the setting, and also make a document. This is the transmission.

No-load outcome worth of the sensing unit. At the same time, the input impedance of the sensing unit is gauged, and the output insusceptibility and also the no-load result are compared to the technological requirements offered by the producer at the manufacturing facility.

( 3) After packing and also calibrating the scale with the basic weight, it is best to gauge each of the scales under the condition of basic weight loading.

Just the result value of the sensor, number it according to the placement, make a record as well as suggest the common weight worth. This is the sensor's typical weight output.

worth.

2. Tracking.

Figure out the moment space of the following dimension according to the location of use, celebration, environment and also other problems. For each sensor.

The vacant range output (or standard weight output), no-load output for tracking dimension.

( 1) Use the manufacturing void to regularly gauge the empty range outcome and also no-load result of each sensing unit of the scale.

The problems can measure the standard weight result of each sensor under the exact same typical weight. Make a record and compare it with the initial document.

( 2) When the sensing unit's empty scale output (or basic weight output) as well as no-load output change significantly, the monitoring time gap must be.

Shorten, the tracking density need to be increased; when the result is stable for a very long time, the monitoring gap can be appropriately prolonged.

( 3) The same load is contrasted on its own at different points (areas) of the scale, and the tolerance is gone beyond, and also the vacant range of each sensor is measured.

Result, no-load output, make a record, as well as contrast with the initial record.

This method is commonly made use of under busy evaluating problems to comprehend the operating standing of the scale.

( 4) When the sensing unit's "sub-healthy" sensation appears, it is needed to increase the result of the empty range monitoring each sensing unit (or.

Standard weight result) The determined thickness of no-load outcome, make a record, and also compare it with the original record.

( 5) For digital sensors, make use of the very same technique to go into the vacant scale inner code worth, vacant interior code value, and also basic weight internal code worth.

Conduct surveillance and monitoring, and make good documents.




The lasting stability of the no factor of the tons cell is a prerequisite technical index in the integrity as well as security of the sensing unit. On this basis, after exploration, it is located that the empty range result and also no-load outcome signal changes of the lots cell. At the exact same time, it additionally discusses the output of the empty scale. The adjustment of the result of the vacant scale is a concentrated representation of two important technical signs of the tons cell no point as well as linearity.

One of these phenomena shows that there are "sub-healthy" sensors in the scale.

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