步驟1：安裝稱重傳感器

首先，我們要安裝稱重傳感器。您的坐騎將是唯一的，但是這里是您需要遵循的準(zhǔn)則：

1。鋼制稱重傳感器是一塊板，中間裝有應(yīng)變片。稱重傳感器通過感應(yīng)稱重傳感器彎曲多少來測量力。

2。支架通過稱重傳感器梁兩端的孔連接。托架的形狀使拉力施加在測力傳感器梁的中心。由于其形狀和固定位置，拉動托架時稱重傳感器梁會彎曲。

3。將括號鉤到要測量的內(nèi)容上。為此，最好使用可以自由移動的東西（例如鏈，鉤，結(jié)實的繩子或扎帶）。您希望稱重傳感器和托架組件能夠使其自身在稱重方向上居中，以便測量準(zhǔn)確。

步驟2：為稱重傳感器和HX711接線

請參閱接線圖，以了解如何連接稱重傳感器，HX711和Arduino。

在所示的行李箱式稱重傳感器上，有多個應(yīng)變儀已經(jīng)連接到惠斯通電橋。您所需要做的就是以正確的方向?qū)?dǎo)線連接到HX711板上。

步驟3：將HX711庫添加到Arduino IDE

HX711庫位于此處：https://github.com/bogde/HX711

有關(guān)如何將庫添加到Arduino IDE的說明，請參見Arduino網(wǎng)站上的此鏈接：https：//www。 arduino.cc/zh-CN/Guide/Libraries

步驟4：校準(zhǔn)并稱重！

Sparkfun有出色的Arduino程序可以運行規(guī)模。最新版本可以在GitHub上找到，并在下面轉(zhuǎn)載：https://github.com/sparkfun/HX711-Load-Cell-Amplifier

第一步是確定秤的校準(zhǔn)因子。為此，請運行以下代碼

/*

Example using the SparkFun HX711 breakout board with a scale

By： Nathan Seidle

SparkFun Electronics

Date： November 19th， 2014

License： This code is public domain but you buy me a beer if you use this and we meet someday （Beerware license）。

This is the calibration sketch. Use it to determine the calibration_factor that the main example uses. It also

outputs the zero_factor useful for projects that have a permanent mass on the scale in between power cycles.

Setup your scale and start the sketch WITHOUT a weight on the scale

Once readings are displayed place the weight on the scale

Press +/- or a/z to adjust the calibration_factor until the output readings match the known weight

Use this calibration_factor on the example sketch

This example assumes pounds （lbs）。 If you prefer kilograms， change the Serial.print（“ lbs”）; line to kg. The

calibration factor will be significantly different but it will be linearly related to lbs （1 lbs = 0.453592 kg）。

Your calibration factor may be very positive or very negative. It all depends on the setup of your scale system

and the direction the sensors deflect from zero state

This example code uses bogde‘s excellent library：“https://github.com/bogde/HX711”

bogde’s library is released under a GNU GENERAL PUBLIC LICENSE

Arduino pin 2 -》 HX711 CLK

3 -》 DOUT

5V -》 VCC

GND -》 GND

Most any pin on the Arduino Uno will be compatible with DOUT/CLK.

The HX711 board can be powered from 2.7V to 5V so the Arduino 5V power should be fine.

*/

#include “HX711.h”

#define DOUT 3

#define CLK 2

HX711 scale;

float calibration_factor = -7050; //-7050 worked for my 440lb max scale setup

void setup（） {

Serial.begin（9600）;

Serial.println（“HX711 calibration sketch”）;

Serial.println（“Remove all weight from scale”）;

Serial.println（“After readings begin， place known weight on scale”）;

Serial.println（“Press + or a to increase calibration factor”）;

Serial.println（“Press - or z to decrease calibration factor”）;

scale.begin（DOUT， CLK）;

scale.set_scale（）;

scale.tare（）; //Reset the scale to 0

long zero_factor = scale.read_average（）; //Get a baseline reading

Serial.print（“Zero factor： ”）; //This can be used to remove the need to tare the scale. Useful in permanent scale projects.

Serial.println（zero_factor）;

}

void loop（） {

scale.set_scale（calibration_factor）; //Adjust to this calibration factor

Serial.print（“Reading： ”）;

Serial.print（scale.get_units（）， 1）;

Serial.print（“ lbs”）; //Change this to kg and re-adjust the calibration factor if you follow SI units like a sane person

Serial.print（“ calibration_factor： ”）;

Serial.print（calibration_factor）;

Serial.println（）;

if（Serial.available（））

{

char temp = Serial.read（）;

if（temp == ‘+’ || temp == ‘a(chǎn)’）

calibration_factor += 10;

else if（temp == ‘-’ || temp == ‘z’）

calibration_factor -= 10;

}

}

在校準(zhǔn)秤后，您可以運行以下示例程序，然后將其用于自己的目的：

/*

Example using the SparkFun HX711 breakout board with a scale

By： Nathan Seidle

SparkFun Electronics

Date： November 19th， 2014

License： This code is public domain but you buy me a beer if you use this and we meet someday （Beerware license）。

This example demonstrates basic scale output. See the calibration sketch to get the calibration_factor for your

specific load cell setup.

This example code uses bogde‘s excellent library： “https://github.com/bogde/HX711”

bogde’s library is released under a GNU GENERAL PUBLIC LICENSE

The HX711 does one thing well： read load cells. The breakout board is compatible with any wheat-stone bridge

based load cell which should allow a user to measure everything from a few grams to tens of tons.

Arduino pin 2 -》 HX711 CLK

3 -》 DAT

5V -》 VCC

GND -》 GND

The HX711 board can be powered from 2.7V to 5V so the Arduino 5V power should be fine.

*/

#include “HX711.h”

#define calibration_factor -7050.0 //This value is obtained using the SparkFun_HX711_Calibration sketch

#define DOUT 3

#define CLK 2

HX711 scale;

void setup（） {

Serial.begin（9600）;

Serial.println（“HX711 scale demo”）;

scale.begin（DOUT， CLK）;

scale.set_scale（calibration_factor）; //This value is obtained by using the SparkFun_HX711_Calibration sketch

scale.tare（）; //Assuming there is no weight on the scale at start up， reset the scale to 0

Serial.println（“Readings：”）;

}

void loop（） {

Serial.print（“Reading： ”）;

Serial.print（scale.get_units（）， 1）; //scale.get_units（） returns a float

Serial.print（“ lbs”）; //You can change this to kg but you‘ll need to refactor the calibration_factor

Serial.println（）;

}

責(zé)任編輯：wv