Why can electronic scales immediately show the weight and price of the object to be weighed?

In the family of scales, there is a rising star - electronic scales.

When weighing goods, the electronic scale will not only not be short of two, but also will not calculate the wrong amount, which is convenient and accurate.

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How does the electronic scale weigh the object and calculate the goods? In order to quickly display the weight of the weighed object, the electronic scale must first accurately convert the weight of the weighed object into the corresponding voltage, and then display the magnitude of the voltage on the display with numbers.

There are four major parts in electronic scales: strain sensors, voltage amplifiers, and analog-to-digital converters.

and digital displays, which have these two "skills".

The strain sensor used in electronic scales is a pressure rheostat made of nickel metal wire. The resistance on the chip is "strained with pressure" and becomes smaller when squeezed by heavy objects.

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This phenomenon is called the "piezoresistive effect" in physics. When the heavy object is pressed and hung on the rheostat sheet, the resistance in the rheostat changes rapidly, and the corresponding voltage is output from the strain circuit, the heavier the object, the higher the output voltage; The lighter the object, the lower the output voltage. This voltage is called an "analog voltage".

After the voltage amplifier amplification and analog-to-digital converter, the corresponding digital voltage is finally formed, which is sent to the liquid crystal digital display to quickly display the weight of the weighed object.

If you put another microprocessor in the scale.

It functions as a calculator. As long as the unit price of the weighed goods is entered through the keyboard, the ** of the weighed goods will be displayed on the display screen at the same time.

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It calculates on the same principle as a normal electronic calculator. It's just that in the electronic scale, the data of the weighed weight of the goods is first obtained through the strain sensor and the analog-to-digital converter, and the data of the unit price of the goods is entered by the keyboard. On the electronic calculator, in order to obtain the total price of the goods, it is necessary to enter both the weight and the unit price of the goods with a keyboard.

Electronic scales have been widely used because of their fast, accurate and convenient weighing characteristics. Floor scales, crane scales, hopper scales, etc. used in industry can be replaced by electronic scales, and even laboratories and research institutes have also used electronic scales in analysis and testing. In the supermarket, by connecting the electronic scale to the printer, the weight and ** of the weighed goods can not only be displayed immediately, but also quickly printed on paper tape.

Because the working principle of the electronic scale is to change the resistance value by the weight, to weigh the weight of the object.

This is the physical principle, the weight of the object, through the electronic scale to find out, and then according to the set **.

The electronic scale must first accurately convert the weight of the weighed object into the corresponding voltage, and then display the voltage on the display with numbers.

When an object is placed on the weighing pan, pressure is applied to the sensor, which deforms and converts into weight.

When the heavy object is pressed and hung on the rheostat, the resistance in the rheostat changes rapidly, and the corresponding voltage is output from the strain circuit, the heavier the object, the higher the output voltage; The lighter the object, the lower the output voltage, which is called the "analog voltage".

The weight on this should be felt through the pressure sensor, and ** adds and subtracts it by itself like a computer.

When a heavy object is pressed on the rheostat, the resistance in the rheostat changes rapidly and responds.

Use the top appropriately.

Is there an electronic scale punch electrical appliance?

It will be heavier, you see if there is a knob or button to adjust the zero, if there is one, you can set it to zero to restore the zero position.

1. Whether the battery has electricity.

If the numbers are not displayed, and they can't be turned on, it may be out of power, so check whether the scale battery is charged. If it is out of power, use a rechargeable battery-type electronic scale, charge it first.

Or if you use batteries, go to the store that sells button batteries and buy the same type of battery. Or consult the merchant who sent the electronic scale by the buyer.

2. Check the voltage.

It can be turned on, but the weight is not displayed after it is turned on, and the battery voltage of the electronic scale needs to be checked, and it should be higher than 6V. If it is lower, please charge, if it is lower, and the battery is out of power soon after charging, please replace the battery.

Classification of electronic scales:

1. Waterproof scale.

With the development of electronic scales and the needs of special applications, waterproof scales came into being. Waterproof, as the name suggests, is waterproof. Due to the different waterproof levels, waterproof scales also have certain differences in waterproof performance.

Some waterproof scales have the highest waterproof level of IP68 and can be weighed even when soaked in water.

2. Waterproof pricing scale.

On the basis of the original pricing scale, the waterproof design is carried out, and the internal scale structure is redesigned according to the waterproof level. The external weighing pan, power cord connectors, switches, etc. have been redesigned.

3. Energy scale.

The energy scale is an innovation of traditional electronic scales and body scales, which do not require batteries and do not rely on solar energy. It is the use of mechanical energy converted into electrical energy to provide electricity for weighing.

The working principle of the electronic scale: when the object is placed on the weighing pan, the pressure is applied to the sensor, which is deformed, so that the impedance changes, and at the same time, the excitation voltage is changed, and a changing analog signal is output.

The signal is amplified by an amplification circuit and output to an analog-to-digital converter. Convert into a digital signal for easy processing and output to CPU operation control.

Summary. Dear, I'm glad to answer for you: The reasons and solutions for the electronic scale not showing the weight are as follows:

1. Check whether the connecting wire is broken or desoldered, mainly whether the wire of the sensor is broken, and whether the connector of the sensor is broken or desoldered. 2.Recalibrate to see if you can weigh 3

In the case that the connection line is good, look at your meter can see the value of the internal code, if you can, see if the internal code has changed 4Change the instrument or sensor to try 3, if the number is not displayed, and it can't be turned on, it may be out of power, first check whether the scale battery has power. If there is no power, charge the electronic scale first.

4. If it can be turned on, but the weight is not displayed after it is turned on, you need to check the battery voltage of the electronic scale. When the battery voltage is too low, it needs to be charged, and if it runs out of power soon after charging, it proves that there is a problem with the battery.

Dear, I'm glad to answer for you: the reasons and solutions for the electronic scale not to display the weight are as follows: 1. Check whether the connecting wire is broken or desoldered, mainly because the wire of the sensor is not broken, and the connector of the sensor is broken or leaky.

2.Recalibrate to see if you can weigh 3In the case that the connection line is good, look at your meter can see the value of the internal code, if you can, see if the internal code has changed 4

Change the instrument or sensor to try 3, if the number is not displayed, and it can't be turned on, it may be closed is out of power, first check whether the scale battery is charged. If there is no power, charge the electronic scale first. 4. If it can be turned on, but the weight is not displayed after turning on, you need to check the battery voltage of the electronic scale.

When the battery voltage is too low, it needs to be charged, and if it runs out of power soon after charging, it proves that there is a problem with the battery.

I'm talking about the scale being normal in every way. Can it be made bigger and smaller artificially?

Dear, the electronic scale is normal in all aspects. It can be manually adjusted up and smallened as follows: Step 1:

Determine whether the battery of the electronic scale is sufficient, the battery should be replaced in time if it is empty, and the power will lead to inaccurate display of the electronic scale. Step 2: Place the electronic scale horizontally on the floor, if the electronic scale is high and low, or there is an elevation angle with the horizontal plane, it will cause the weighing to be inaccurate.

Step 3: Stand upright on the scale with both feet, and do not shake your body from side to side. Do not weigh on one foot or in a squatting position, as this will result in inaccurate weighing.

Step 4: Weigh each five times according to the method of step 3 and take the average value. In this way, the weight of the scale is more accurate.

Note that when weighing, the weight should not exceed the maximum weight of the electronic scale. Step 5: Find another accurate electronic scale for weighing, take the average value for comparison, if the error is large, it means that there is a problem inside the electronic scale.

Precautions If the problem of inaccurate electronic scale can not be solved in accordance with the above adjustment steps, you should find after-sales maintenance, electronic scale belongs to electronic products, and ordinary users have no way to repair circuit problems.

Summary. Dear, hello, I'm glad to answer for you, first, weigh out 100 and calculate how much each weighs;

2. Weigh out a pile;

3. The total weight of a pile divided by the weight of the individual is the total quantity.

How do you calculate how many of them are weighed on an electronic scale?

Hello, I am inquiring for you here, please wait for a while, I will reply immediately.

Dear, hello, I'm glad to answer for you, first, weigh out 100 and calculate how much each weighs; 2. Weigh out a pile; 3. The total weight of a pile divided by the weight of the individual is the total quantity.

If the total weight is kilograms, how many grams per gram will be.

Dear, if the total weight is kilograms, and a single gram is a few grams, then the total number is about 955 Oh, okay, thank you.

You're welcome, dear.

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