RU183764U1 - Universal stand-alone wireless meter-switch for controllers and sensors with digital and analog outputs - Google Patents

Abstract

The proposed utility model is intended for measuring, converting and controlling signals from controllers, sensors, and other devices, followed by transmission over the LoraWAN network. The wireless meter for measuring, converting and controlling pressure into a digital signal with subsequent transmission over the LoraWAN network includes a measuring device with an output current of the signal 4-20 mA 1 current loop, the output of which is connected to the first input / output of controller 2 and the input of voltage boost converter 3. The output of the voltage boost converter 3 is connected to the second input / output of the controller 2 and the input of the voltage divider 4. The output of the voltage divider 4 is connected in series with the logical keys 5, 6 located on the control Ller 2, while the keys 5.6 and the controller 2 are connected to a power source 7. The technical result is the expansion of the functionality of the device. 1 ill.

Description

The proposed utility model is designed to measure, convert and control signals from controllers and sensors, followed by transmission over the LoraWAN network.

Known Wireless Pressure Meter (BID-1), Manufacturer: AMT, Chipset: SX1272, Technology: LoRaWAN, Frequencies: 868 MHz., Containing a battery, power source, voltage converter STM controller, radio transmitter, computing device connected to the primary converter. Designed for continuous measurement and conversion of absolute, gauge, rarefaction, pressure-rarefaction pressure, differential pressure and hydrostatic pressure of neutral and aggressive, gaseous and liquid media into a digital signal with subsequent transmission via LoraWAN network. (see http://www.auroramobile.ru/product_851.html)

In the prototype device, after power is supplied, the sensor does not enter the standby mode of commands from the master device, but first of all takes measurements and issues data to the line, then goes into standby mode. This makes it possible to disable the sensor after receiving data.

The main disadvantage: Data transfer / polling protocol: ModBUS RTU, which does not allow working with pressure sensors with an output current of 4-20 mA, which reduces the functionality of the prototype device.

The problem solved by the proposed utility model is to expand the functionality of the device when working with data from pressure sensors with an output current of 4-20 mA.

The problem is solved using the characteristics indicated in the utility model formula, such as a wireless meter for measuring, converting and controlling pressure into a digital signal, followed by transmission through the LoraWAN network, including a measuring device with an output current of the signal current loop 4-20 mA 1, output which is connected to the first input / output of the controller 2 and the input of the step-up voltage converter 3, the output of which is connected to the second input / output of the controller 2, and the input of the voltage divider 4, the output of which is connected in series with the logs keys 5, 6 located on the controller 2, while the keys 5,6, and the controller 2 are connected to a power source 7.

The above set of essential features allows you to get the following technical result - the expansion of the functionality of the device when working with data from pressure sensors with an output current of 4-20 mA.

The utility model is illustrated by the block diagram in Fig., Where the positions indicated:

1 - Measuring device with the output current of the signal current loop 4-20 mA;

2 - controller;

3 - step-up voltage converter;

4 - voltage divider;

5 - 6 logical keys;

7 - power source.

The wireless meter (Fig.) For measuring, converting and controlling pressure into a digital signal with subsequent transmission over the LoraWAN network contains a measuring device with an output signal current of 4-20 mA 1 current loop, the output of which is connected to the first input / output of controller 2 and the input step-up voltage converter 3, the output of which is connected to the second input / output of the controller 2, and the input of the voltage divider 4, the output of which is connected in series with the logical keys 5,6 located on the controller 2, and the outputs of the keys 5, 6, and the controller 2 and connected to the power supply 7.

The device operates as follows.

The supply voltage from the power source 7 is supplied to the controller 2 and to the logical key 6. After the power is supplied, the controller registers in the Lora network, sets the logical 0 on the key 5 (power off of the measuring device 1). After the time, the keys 1 and 5 receive the logic 1 from the controller 2, open the key 5, it opens the key 6, the supply voltage is supplied to the step-up voltage converter 3. The supply voltage is applied to measuring device 1 for 5 seconds. After the time delay, the supply voltage is measured at the analog input of the controller 2, through the voltage divider 4. We also measure the current consumption of the measuring device at the analog input of the controller 2. We send the measured data to the Lora network. We disconnect the power from the boost converter 3 by setting a logical 0 on the key 6.

The use of a standard pressure sensor with an output current of 4-20 mA, forces the use of a step-up voltage converter with a rather large current consumption from a 3.6 V battery (up to 120 mA). And turn it on at the time the sensor starts to work (in this case, for 6 seconds). This dramatically reduces the overall battery life. But it allows you to connect to any type of sensors, the main thing is that the sensor output signal is 4-20 mA. And transfer any type of parameter (pressure, temperature, level, vibration, flow, valve opening angle) to the Lora network.

From the description and practical application of the present utility model, other particular forms of its implementation will be obvious to specialists.

This description and drawings are considered as material illustrating a utility model, the essence of which and the scope of patent claims are defined in the following utility model formula, a set of essential features and their equivalents.

Claims (1)

A wireless meter for measuring, converting and controlling pressure into a digital signal with subsequent transmission via the LoraWAN network, including a measuring device with an output current of the signal 4-20 mA current loop 1, the output of which is connected to the first input / output of controller 2 and the input of voltage boost converter 3 the output of which is connected to the second input / output of the controller 2 and the input of the voltage divider 4, the output of which is connected in series with the logical keys 5, 6 located on the controller 2, while the keys 5,6 and the controller 2 under lyucheny to power supply 7.

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