ADC/en: различия между версиями

Материал из Wiren Board
(Новая страница: «| Vin || 33k/4k51 ||N / 4095 * 1.85V * 8.32 || V = N * 3.76 mV || 30.6V || input voltage, iio channel 0 |-»)
(не показаны 33 промежуточные версии 4 участников)
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<languages/>{{DISPLAYTITLE: Analog inputs (ADC)}}
<languages/>
== Definitions ==
'''Analog to digital converters (ADC)''' — devices designed to convert input analog signals into digital code.


'''Analog inputs''' — ADC inputs used to measure the voltage applied to them. Analog inputs in automation devices are designed to connect sensors with an [[AnalogSensors_connecting | analog output signal]].
== How to get voltage from ADC ==


== Analog inputs in the Wiren Board controller==
#Select the terminal to which your source can be connected based on the maximum allowable voltage (see table below).
=== Wiren Board 6 === 
#Most ADC terminals have two functions: ADC and low-voltage load control. Before measuring the voltage on the ADC, turn off the appropriate low-voltage load control output. For example, if you are connecting to terminal A1, turn off A1_OUT in the web interface (the Relays & FETs section).
In the Wiren Board 6 ADC processor chanels are connected to terminals A1-A4. Also, the ADC has an input voltage (after the input diodes) and a voltage at the 5Vout terminal.
#:For details, see [[Multiplexing ports|Multiplexing ports]]
=== Wiren Board 7 === 
#Connect your source to the terminal. The voltage value will immediately appear in the [[Wiren Board 4:Веб-интерфейс | веб-интерфейсе]] in the ADCs device. The value is also translated to the MQTT message system[[MQTT|MQTT]].
In the Wiren Board 7 processor chanels are connected to terminals A1-A3. Voltages at the D1 terminal and at the 5Vout terminal are not measured.
<gallery mode="packed" heights="100px" caption="Universal inputs/outputs">
Image: WB6_AI_DI.PNG| Wiren Board 6
Image: WB7_AI_DI.PNG| Wiren Board 7
Image: WB6.Ax.png| Schematic diagram of the input Ax
Image: WB7.D1.png| Schematic diagram of the input D1 in Wiren Board 7
</gallery>
== Voltage measurement ==
=== Connection and setup ===
#The voltage must be within the acceptable range.
#The Ax terminal blocks perform two functions: ADC and low voltage load control. Before measuring voltage, set the corresponding low voltage load control output to the off position. For example, if you are connecting to terminal A1, turn off A1_OUT in [[Веб-интерфейс Wiren Board | web interface]] (section Relays & FETs).
#Connect your source to the Ax terminal. The voltage value will immediately appear in the [[Веб-интерфейс Wiren Board | web interface]] on the ADCs. The value is also transmitted to the message system [[Special:MyLanguage/MQTT|MQTT]].
=== Measured voltage display  === 
The wb-homa-adc daemon transmits a value to MQTT message queuing to the /devices/wb-adc/controls/Vin topic.
So the value is displayed in the web interface as the Vin channel of the ADC device.


Смотрите также:
 
* [[Wiren Board 6.2: Peripherals#Каналы АЦП| ADC chanels of Wiren Board 6.2]]
== Using values from external programs ==
* [[Wiren_Board_7.2:_Peripherals#Аналоговые_входы| ADC chanels of Wiren Board 7]]
 
* [[ADC.OLD | ADC lists for older controller versions]]
A special WB-homa-adc driver translates the value to the [[MQTT|MQTT]] system and can be obtained there.
 
Also, the value can be obtained in manual mode:[[Низкоуровневая работа с ADC|Низкоуровневая работа с ADC]].
 
 
== Resistance measurement ==
 
Wiren Board 5.8 controllers '''and below''' were able to measure the resistance of resistors connected to the R1 and R2 inputs.
 
TODO: you should write here how to configure resistive inputs through the web interface.
 
See [[ADC:Измерение сопротивлений - технические детали|ADC:Измерение сопротивлений - технические детали]]
 
 
== Input voltage  ==
 
Демон wb-homa-adc транслирует значение в очередь сообщений MQQT в топик  /devices/wb-adc/controls/Vin .
Таким образом, значение отображается в веб-интерфейсе как канал Vin устройства ADCs
 
The wb-homa-adc daemon translates the value to the MQQT message queue in the /devices/wb-adc/controls/Vin topic. Therefore, the value is displayed in the web interface as the Vin channel of the ADCs device
 
 
== Battery voltage ==
 
The wb-homa-adc daemon translates the value to the MQTT message queue in the topic /devices/wb-adc/controls/BAT. Therefore, the value is displayed in the web interface as the BAT channel of the ADCs device
 
 
Manual mode: see [[Низкоуровневая работа с ADC| low-Level ADC operation]].
 
 
 
 
== Technical details on the implementation of the ADC ==
 
Wiren Board сontrollers versions 2.3 and 4 have 8 ADC channels that are multiplexed into one processor channel (LRADC1). Multiplexing channels are shown in the table [[Wiren Board 4:Список GPIO|Wiren Board 4:Список GPIO]].
 
The Wiren Board 5 uses 8 different ADC channels that are connected to separate processor channels. The 4V line is connected to the BAT channel (LRADC7), in addition to measuring the voltage at the 2 resistive inputs, 4 universal inputs A1-A4 and the input voltage (see table below).
 
The ADC channels serving the R1 and R2 inputs have a built-in independent current source that is used to measure the resistance connected to the channel. Current source accuracy: 5%. See [[Калибровка аналоговых входов| Calibration of analog inputs]].
 
In Wiren Board 6, the ADC channels of the processor are connected to terminals A1-A4. Also, the ADC has input voltage (after the input diodes) and voltage at the terminal 5Vout.
 
 
 
=== The main channels ===
 
A part of the ADC channels is output to the terminals in parallel with the low-voltage load control transistors. '''Make sure''' you have closed the corresponding FET using GPIO before using the ADC. For details, see [[Мультиплексирование портов|Мультиплексирование портов]]
 
 
=== A list of ADC for different devices ===
 
 
==== Wiren Board 6 ====
 
See  [[Wiren Board 6.2: Peripherals#Каналы АЦП|Wiren Board 6.2: Peripherals#Каналы АЦП]]
 
 
==== Wiren Board 5 ====
 
{|  border="1"  class="wikitable" style="text-align:center"
! terminal block || ADC Channel (LRADCxx) || Divider||  Final formula (without divider) || V max. measured || comments
|-
 
| A1 ||  1
|rowspan="4"|88k7/12k  ||  rowspan="4"|  V = N * 3.80 mV || rowspan="4"| 31V || rowspan="4"|
|-
| A2 || 2
|-
| A3 || 3 
|-
| A4 || 4 
|-
 
 
| R1 ||  6
|rowspan="2"| 1  ||  rowspan="2"|  V = N * 0.4518 mV|| rowspan="2"| 3.1V || rowspan="2"|  r2 = 3150 Ohm,
r1 = 1000 kOhm
|-
| R2 || 0 
|-
 
 
 
 
| 4В/li_pol || 7 ||
| V = N * 1.807 mV || - || on the 4 В line
|-
| Vin || 5
|88k7/12k||  V = N * 3.80 mV || 31V || inpit voltage
|-
|}
 
 
==== WB4 ====
 
{| border="1"
|
Terminal block || Divider || Formula to recalculate  || Final formula (without divider) || V max. measured (with divider)  || comments
|-
 
| A1-A3 || 100k/90.9k || N / 4095 * 1.85V * 2.100 || V = N * 0.949 mV || 7.4V  ||
|-
| A4-A5 || 100k/11.86k ||  N / 4095 * 1.85V * 9.43  || V = N * 4.26 mV || 34.4V ||
|-
| R1-R2 || 3k15/1M || N / 4095 * 1.85V * 1.003 || V = N * 0.426 mV || 3.7V ||
|-
| li_pol || 100k/90.9k || N / 4095 * 1.85V * 2.100  || V = N * 0.949 mV || - || battery
|-
 
| Vin || 33k/4k51 ||N / 4095 * 1.85V * 8.32 || V = N * 3.76 mV || 30.6V || input voltage, iio channel 0
|-
 
|}
 
 
==== WB3.5 ====
 
{| border="1"
| клеммник || Делитель|| Формула для пересчета || Итоговая формула || V max || комментарии
|-
 
| A1-A4 || 220k/22k||  V = N / 4095 * 1.85V * 11 || V = N * 4.97 mV || ||
|-
 
| R1-R4 || - ||  V = N / 4095 * 1.85V ||V = N * 0.452 mV || ||
|-
 
| Vin || 33k/4k53 ||N / 4095 * 1.85V * 8.28 || V = N * 3.74 mV || 30V || входное напряжение, iio channel: 0
|-
 
|}
 
 
 
 
==== WB NETMON-1 ====
 
{| border="1"
| клеммник || Делитель || Формула для пересчета  || Итоговая формула (без делителя) || V макс. измеряемое (с делителем)  || комментарии
|-
| A1-A8 || 31k/4.68k || N / 4095 * 1.85V * 7.627 || V = N * 3.446 mV || 20V ||
|-
| Vin || 12k/1k ||N / 4095 * 1.85V * 13 || V = N * 5.873 mV ||  || входное напряжение
|-
|}
 
 
 
==== WB2.8 ====
 
{| border="1"
| клеммник || Делитель|| Формула для пересчета  || Итоговая формула || комментарии
|-
 
| A1-A7 || 12K/33K||  V = N / 4095 * 1.85V * 1.364 || V = N * 0.616 mV ||
|-
 
|}

Версия 18:22, 15 мая 2019

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How to get voltage from ADC

  1. Select the terminal to which your source can be connected based on the maximum allowable voltage (see table below).
  2. Most ADC terminals have two functions: ADC and low-voltage load control. Before measuring the voltage on the ADC, turn off the appropriate low-voltage load control output. For example, if you are connecting to terminal A1, turn off A1_OUT in the web interface (the Relays & FETs section).
    For details, see Multiplexing ports
  3. Connect your source to the terminal. The voltage value will immediately appear in the веб-интерфейсе in the ADCs device. The value is also translated to the MQTT message systemMQTT.


Using values from external programs

A special WB-homa-adc driver translates the value to the MQTT system and can be obtained there.

Also, the value can be obtained in manual mode:Низкоуровневая работа с ADC.


Resistance measurement

Wiren Board 5.8 controllers and below were able to measure the resistance of resistors connected to the R1 and R2 inputs.

TODO: you should write here how to configure resistive inputs through the web interface.

See ADC:Измерение сопротивлений - технические детали


Input voltage

Демон wb-homa-adc транслирует значение в очередь сообщений MQQT в топик /devices/wb-adc/controls/Vin . Таким образом, значение отображается в веб-интерфейсе как канал Vin устройства ADCs

The wb-homa-adc daemon translates the value to the MQQT message queue in the /devices/wb-adc/controls/Vin topic. Therefore, the value is displayed in the web interface as the Vin channel of the ADCs device


Battery voltage

The wb-homa-adc daemon translates the value to the MQTT message queue in the topic /devices/wb-adc/controls/BAT. Therefore, the value is displayed in the web interface as the BAT channel of the ADCs device


Manual mode: see low-Level ADC operation.



Technical details on the implementation of the ADC

Wiren Board сontrollers versions 2.3 and 4 have 8 ADC channels that are multiplexed into one processor channel (LRADC1). Multiplexing channels are shown in the table Wiren Board 4:Список GPIO.

The Wiren Board 5 uses 8 different ADC channels that are connected to separate processor channels. The 4V line is connected to the BAT channel (LRADC7), in addition to measuring the voltage at the 2 resistive inputs, 4 universal inputs A1-A4 and the input voltage (see table below).

The ADC channels serving the R1 and R2 inputs have a built-in independent current source that is used to measure the resistance connected to the channel. Current source accuracy: 5%. See Calibration of analog inputs.

In Wiren Board 6, the ADC channels of the processor are connected to terminals A1-A4. Also, the ADC has input voltage (after the input diodes) and voltage at the terminal 5Vout.


The main channels

A part of the ADC channels is output to the terminals in parallel with the low-voltage load control transistors. Make sure you have closed the corresponding FET using GPIO before using the ADC. For details, see Мультиплексирование портов


A list of ADC for different devices

Wiren Board 6

See Wiren Board 6.2: Peripherals#Каналы АЦП


Wiren Board 5

terminal block ADC Channel (LRADCxx) Divider Final formula (without divider) V max. measured comments
A1 1 88k7/12k V = N * 3.80 mV 31V
A2 2
A3 3
A4 4
R1 6 1 V = N * 0.4518 mV 3.1V r2 = 3150 Ohm,

r1 = 1000 kOhm

R2 0
4В/li_pol 7 V = N * 1.807 mV - on the 4 В line
Vin 5 88k7/12k V = N * 3.80 mV 31V inpit voltage


WB4

Terminal block || Divider || Formula to recalculate || Final formula (without divider) || V max. measured (with divider) || comments

A1-A3 100k/90.9k N / 4095 * 1.85V * 2.100 V = N * 0.949 mV 7.4V
A4-A5 100k/11.86k N / 4095 * 1.85V * 9.43 V = N * 4.26 mV 34.4V
R1-R2 3k15/1M N / 4095 * 1.85V * 1.003 V = N * 0.426 mV 3.7V
li_pol 100k/90.9k N / 4095 * 1.85V * 2.100 V = N * 0.949 mV - battery
Vin 33k/4k51 N / 4095 * 1.85V * 8.32 V = N * 3.76 mV 30.6V input voltage, iio channel 0


WB3.5

клеммник Делитель Формула для пересчета Итоговая формула V max комментарии
A1-A4 220k/22k V = N / 4095 * 1.85V * 11 V = N * 4.97 mV
R1-R4 - V = N / 4095 * 1.85V V = N * 0.452 mV
Vin 33k/4k53 N / 4095 * 1.85V * 8.28 V = N * 3.74 mV 30V входное напряжение, iio channel: 0



WB NETMON-1

клеммник Делитель Формула для пересчета Итоговая формула (без делителя) V макс. измеряемое (с делителем) комментарии
A1-A8 31k/4.68k N / 4095 * 1.85V * 7.627 V = N * 3.446 mV 20V
Vin 12k/1k N / 4095 * 1.85V * 13 V = N * 5.873 mV входное напряжение


WB2.8

клеммник Делитель Формула для пересчета Итоговая формула комментарии
A1-A7 12K/33K V = N / 4095 * 1.85V * 1.364 V = N * 0.616 mV
Источник — https://wirenboard.com/wiki/index.php?title=ADC/en&oldid=19512