Turbidity measuring device based on AD7192BRUZ

Abstract

The utility model discloses a turbidity measuring device based on AD7192BRUZ, and belongs to the technical field of turbidity measurement. The device comprises a turbidity meter, a turbidity meter acquisition circuit, a microcontroller and a power supply module. The turbidity meter acquisition circuit comprises an acquisition chip and an AD7192BRUZ module, the acquisition chip comprises an acquisition end and an output end, the acquisition end of the acquisition chip is connected with a turbidity meter, the AD7192BRUZ module is provided with a CS pin and an AIN pin, the CS pin is an enabling pin, and the AIN pin is connected with the output end of the acquisition chip. The microcontroller is provided with a PD14 pin, the PD14 pin is connected with the CS pin through a lead ADCS so as to set the level state of the CS pin, and the microcontroller is in communication connection with the AD7192BRUZ module. The power supply module is respectively connected with the turbidity meter acquisition circuit and the microcontroller so as to provide a working power supply. The turbidity measuring device based on AD7192BRUZ provided by the utility model is simple in structure, low in cost and capable of accurately and reliably measuring the turbidity.

Description

Technical Field

[0001] This utility model belongs to the field of turbidity measurement technology, and in particular relates to a turbidity measurement device based on AD7192BRUZ. Background Technology

[0002] Turbidity refers to the degree to which a solution impedes the passage of light, encompassing both the scattering of light by suspended matter and the absorption of light by solute molecules. Turbidity is a crucial indicator of water quality, reflecting the content and size of suspended particles in the water, directly affecting its clarity and appearance. By measuring turbidity, the cleanliness and transparency of water can be assessed, thus determining whether the water quality meets relevant standards. Turbidity measurement is not only used in assessing drinking water quality but also plays a vital role in industrial water use and wastewater treatment. For example, certain industrial water uses have specific turbidity requirements, such as cooling water, water used in the paper industry, and water used in the textile industry; turbidity measurement is a key indicator for ensuring product quality. However, some existing turbidity measurement devices have low accuracy and high cost, and their measurements are affected by the color of the sample, leading to inconsistent accuracy and reliability of the results. Utility Model Content

[0003] In view of the shortcomings of the related technologies, the purpose of this utility model is to provide a turbidity measuring device based on AD7192BRUZ to solve the problems mentioned in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A turbidity measuring device based on AD7192BRUZ, comprising:

[0006] Turbidity meter;

[0007] The turbidimeter acquisition circuit includes:

[0008] The data acquisition chip includes a data acquisition end and an output end. The data acquisition end of the data acquisition chip is connected to the turbidimeter.

[0009] The AD7192BRUZ module has a CS pin and an AIN pin. The CS pin is the enable pin, and the AIN pin is connected to the output of the acquisition chip.

[0010] The microcontroller has a PD14 pin, which is connected to the CS pin via the AD_CS lead to set the CS pin's level. The microcontroller communicates with the AD7192BRUZ module.

[0011] The power supply module is connected to the turbidimeter acquisition circuit and the microcontroller to provide operating power.

[0012] In some embodiments, the acquisition chip has a +VS pin, a -VS pin, a VOUT pin, a +IN pin, and a -IN pin. The +VS pin is connected to the power supply module, the -VS pin is grounded, the +IN pin is connected to the turbidimeter, and the VOUT and -IN pins are connected to the AIN pins of the AD7192BRUZ module.

[0013] In some embodiments, the acquisition chip is AD8031ARTZ_REEL7.

[0014] In some embodiments, the power supply module includes:

[0015] P1 terminal, P1 terminal is connected to the power supply;

[0016] The first step-down module has an input terminal and an output terminal. The input terminal of the first step-down module is connected to the P1 terminal. The first step-down module is used to reduce the power supply voltage to 24V.

[0017] The second step-down module has an input terminal and an output terminal. The input terminal of the second step-down module is connected to the output terminal of the first step-down module, and the output terminal of the second step-down module is connected to the turbidity meter acquisition circuit. The second step-down module is used to reduce the 24V voltage to 5V.

[0018] The third step-down module has an input terminal and an output terminal. The input terminal of the third step-down module is connected to the output terminal of the second step-down module, and the output terminal of the third step-down module is connected to the microcontroller. The third step-down module is used to reduce the 5V voltage to 3.3V.

[0019] In some embodiments, the power supply module further includes a fourth step-down module having an input terminal and an output terminal. The input terminal of the fourth step-down module is connected to the output terminal of the first step-down module, and the fourth step-down module is used to reduce the 24V voltage to 12V.

[0020] In some embodiments, the turbidimeter acquisition circuit also includes a voltage reference chip with an IN pin, an OUT pin, and a GND pin. The AD7192BRUZ module also has a REFIN1+ pin, with the IN pin connected to the output of the second buck module and the OUT pin connected to the REFIN1+ pin.

[0021] In some embodiments, the AD7192BRUZ module also has an SCLK pin, a DOUT pin, and a DIN pin, and the microcontroller has a PB3 pin, a PB4 pin, and a PB5 pin; the SCLK pin is connected to the PB3 pin via the SPI3_SCK lead, the DOUT pin is connected to the PB4 pin via the SPI3_MISO lead, and the DIN pin is connected to the PB5 pin via the SPI3_MOSI lead.

[0022] In some embodiments, the AD7192BRUZ module's AIN pins include AIN1, AIN2, AIN3, and AIN4 pins, which are respectively connected to four acquisition chips.

[0023] In some embodiments, the microcontroller also has a PH0-OSC_IN pin and a PH1-OSC_OUT pin to connect to an external crystal oscillator Y2. The external crystal oscillator Y2 has pins 1, 2, 3, and 4. Pin 1 is connected to the PH0-OSC_IN pin, pin 3 is connected to the PH1-OSC_OUT pin, pins 2 and 4 are connected to the first terminals of capacitors C56 and C65, the first terminals of capacitors C56 and C65 are grounded, the second terminal of capacitor C56 is connected to the PH1-OSC_IN pin, and the second terminal of capacitor C65 is connected to the PH1-OSC_OUT pin.

[0024] In some embodiments, the turbidimeter is an OBS turbidimeter.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. The turbidity measuring device based on AD7192BRUZ provided by this utility model consists of a turbidity meter, a turbidity meter acquisition circuit, a microcontroller and a power supply module. It has a simple structure, low cost and can accurately and reliably measure turbidity.

[0027] 2. The power supply module of the turbidity measurement device based on AD7192BRUZ provided by this utility model includes multiple step-down modules, which can provide more voltage and current options, and have high power supply stability and reliability, ensuring the stable operation of the device. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the turbidity meter acquisition circuit of an embodiment of the turbidity measurement device based on AD7192BRUZ of this utility model;

[0030] Figure 2 This is a schematic diagram of a microcontroller for one embodiment of the turbidity measurement device based on AD7192BRUZ of this utility model;

[0031] Figure 3 This is a schematic diagram of the power supply module of one embodiment of the turbidity measuring device based on AD7192BRUZ of this utility model. Detailed Implementation

[0032] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] See appendix Figures 1 to 3 This paper presents an illustrative embodiment of the turbidity measurement device based on AD7192BRUZ proposed in this invention. The turbidity measurement device based on AD7192BRUZ includes a turbidity meter, a turbidity meter acquisition circuit, a microcontroller, and a power supply module.

[0036] The turbidimeter acquisition circuit includes an acquisition chip and an AD7192BRUZ module. The acquisition chip has an acquisition terminal and an output terminal; the acquisition terminal of the chip is connected to the turbidimeter. Specifically, the turbidimeter is an OBS turbidimeter, which has the advantages of compact design, low power consumption, and high measurement accuracy. The control circuit of the turbidimeter measurement device based on the AD7192BRUZ is mainly composed of the AD7192BRUZ module. The AD7192BRUZ module has a CS pin and an AIN pin. The CS pin is the enable pin, active low, and the AIN pin is connected to the output terminal of the acquisition chip.

[0037] The microcontroller has a PD14 pin, which is connected to the CS pin via the AD_CS lead to set the voltage level of the CS pin, thereby enabling the AD7192BRUZ module. Furthermore, the microcontroller also communicates with the AD7192BRUZ module. Specifically, when the microcontroller is acquiring data, it sets the PD14 pin to a low level. At this time, the CS pin also goes low, enabling the AD7192BRUZ module.

[0038] To ensure reliable data transmission, in this embodiment, the AD7192BRUZ module communicates with the microcontroller via the SPI bus. Specifically, the AD7192BRUZ module has SCLK, DOUT, and DIN pins, while the microcontroller has PB3, PB4, and PB5 pins. The SCLK pin is connected to the PB3 pin via the SPI3_SCK lead, the DOUT pin is connected to the PB4 pin via the SPI3_MISO lead, and the DIN pin is connected to the PB5 pin via the SPI3_MOSI lead. In this embodiment, the pin configuration procedure for the AD7192BRUZ module is as follows:

[0039]

[0040] System control is achieved by defining pins PD14, PB3, PB4, and PB5. SPI bus communication provides a reliable data transmission method, enabling real-time reading of OBS turbidimeter data to meet real-time monitoring and control requirements.

[0041] Specifically, the AD7192BRUZ module is a low-noise, complete analog front-end suitable for high-precision measurement applications, featuring a built-in low-noise, 24-bit analog-to-digital converter (ADC). An on-chip low-noise gain stage means small signals can be directly input. The AD7192BRUZ module can be configured with two differential inputs or four pseudo-differential inputs. An on-chip channel sequencer enables multiple channels, and the AD7192 performs conversions sequentially on each enabled channel, simplifying communication with the device. An on-chip 4.92MHz clock can be used as the ADC's clock source, or an external clock or crystal oscillator can be used. The AD7192BRUZ module's output data rate can be varied from 4.7Hz to 4.8kHz. The AD7192BRUZ module also offers two digital filter options. The choice of filter affects the root mean square noise and noise-free resolution, settling time, and 50Hz / 60Hz rejection when operating at the programmed output data rate. For applications requiring settling for all conversions, the AD7192 features zero latency. The AD7192BRUZ module operates from a 3V to 5.25V power supply, consumes 4.35mA, and is available in a 24-pin TSSOP package. The AD7192BRUZ module has a maximum operating temperature of +105℃ and a minimum operating temperature of -40℃.

[0042] In this embodiment, the acquisition chip has a +VS pin, a -VS pin, a VOUT pin, a +IN pin, and a -IN pin. The +VS pin is connected to the power supply module, the -VS pin is grounded, the +IN pin is connected to the turbidimeter, and the VOUT and -IN pins are connected to the AIN pins of the AD7192BRUZ module. Specifically, the acquisition chip is selected as AD8031ARTZ_REEL7. The AD8031ARTZ_REEL7 consumes less power during operation, which helps to reduce the overall power consumption of the device. Furthermore, it has a wide power supply voltage range and operating temperature range, offering high application flexibility and versatility.

[0043] In this embodiment, see Appendix Figure 1 The AD7192BRUZ module's AIN pins include AIN1, AIN2, AIN3, and AIN4, which are used to connect to four data acquisition chips. The +IN pins of the four acquisition chips are connected to four OBS turbidimeters to acquire turbidity signals and transmit them to the AD7192BRUZ module. Specifically, AIN1 is the first turbidity measurement channel, AIN2 is the second, AIN3 is the third, and AIN4 is the fourth. Using multiple OBS turbidimeters to acquire turbidity signals separately improves monitoring efficiency and increases data reliability.

[0044] In practical applications, the AD7192BRUZ module is first calibrated, and then the values ​​from the first, second, third, or fourth turbidity measurement channels are read. In this embodiment, the main control program of the AD7192BRUZ module is as follows:

[0045]

[0046] The above main control program takes reading the value of the fourth turbidity measurement channel as an example. After reading, it calculates the OBS turbidity value based on the value of the fourth turbidity measurement channel.

[0047] The power supply module is connected to the turbidimeter acquisition circuit and the microcontroller to provide operating power. In this embodiment, the power supply module includes a P1 terminal, a first step-down module, a second step-down module, and a third step-down module. The P1 terminal is connected to the power supply. The first step-down module has an input terminal and an output terminal. The input terminal of the first step-down module is connected to the P1 terminal, and the first step-down module is used to reduce the power supply voltage to 24V. The second step-down module has an input terminal and an output terminal. The input terminal of the second step-down module is connected to the output terminal of the first step-down module, and the output terminal of the second step-down module is connected to the turbidimeter acquisition circuit. The second step-down module is used to reduce the 24V voltage to 5V to provide operating power for the turbidimeter acquisition circuit. The third step-down module has an input terminal and an output terminal. The input terminal of the third step-down module is connected to the output terminal of the second step-down module, and the output terminal of the third step-down module is connected to the microcontroller. The third step-down module is used to reduce the 5V voltage to 3.3V to provide operating power for the microcontroller.

[0048] To improve the efficiency and stability of power conversion, in this embodiment, the power supply module further includes a fourth step-down module. The fourth step-down module has an input terminal and an output terminal. The input terminal of the fourth step-down module is connected to the output terminal of the first step-down module. The fourth step-down module is used to reduce the 24V voltage to 12V. Using multiple step-down modules to progressively reduce the voltage to the operating voltage not only improves the efficiency and stability of power conversion but also simplifies device design and enhances device reliability.

[0049] To provide a stable and reliable voltage reference signal, the turbidimeter acquisition circuit in this embodiment also includes a voltage reference chip. The voltage reference chip has an IN pin, an OUT pin, and a GND pin. The AD7192BRUZ module also has a REFIN1+ pin. The IN pin is connected to the output of the second buck module, and the OUT pin is connected to the REFIN1+ pin. In this embodiment, the voltage reference chip is selected as the REF3033AIDBZR chip, which provides precise and reliable performance while maintaining low power consumption.

[0050] In this embodiment, the microcontroller also has PH0-OSC_IN and PH1-OSC_OUT pins for connecting to an external crystal oscillator Y2. The external crystal oscillator Y2 has pins 1, 2, 3, and 4. Pin 1 is connected to the PH0-OSC_IN pin, pin 3 is connected to the PH1-OSC_OUT pin, pins 2 and 4 are connected to the first terminals of capacitors C56 and C65, respectively. The first terminals of capacitors C56 and C65 are grounded, the second terminal of capacitor C56 is connected to the PH1-OSC_IN pin, and the second terminal of capacitor C65 is connected to the PH1-OSC_OUT pin. The external crystal oscillator Y2 provides a clock signal through an external connection, and it can provide a high-precision clock frequency, ensuring signal accuracy and stability.

[0051] In the above illustrative embodiment, the turbidity measurement device based on AD7192BRUZ consists of a turbidity meter, a turbidity meter acquisition circuit, a microcontroller, and a power supply module. It has a simple structure, low cost, and can accurately and reliably measure turbidity. The power supply module includes multiple step-down modules, providing more voltage and current options, and ensuring high power supply stability and reliability, thus guaranteeing the stable operation of the device.

[0052] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A turbidity measuring device based on AD7192BRUZ, characterized by, The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition.

2. The turbidity measurement device based on AD7192BRUZ of claim 1, wherein, The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition.

3. The turbidity measurement device based on AD7192BRUZ of claim 2, wherein, The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition.

4. The turbidity measurement device based on AD7192BRUZ of claim 1, wherein, The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition.

5. The turbidity measurement device based on AD7192BRUZ of claim 4, wherein, The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition.

6. The turbidity measurement device based on AD7192BRUZ of claim 4, wherein, The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. The utility model relates to a turbidimeter acquisition circuit and a turbidimeter acquisition system, and belongs to the field of turbidimeter acquisition. 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The AD7192BRUZ based turbidity measurement device of claim 1, wherein, The AD7192BRUZ module also has an SCLK pin, a DOUT pin and a DIN pin, the microcontroller has a PB3 pin, a PB4 pin and a PB5 pin; the SCLK pin is connected to the PB3 pin through a lead line SPI3_SCK, the DOUT pin is connected to the PB4 pin through a lead line SPI3_MISO, and the DIN pin is connected to the PB5 pin through a lead line SPI3_MOSI.

8. The AD7192BRUZ based turbidity measurement device according to any one of claims 1-7, wherein, The AIN pin of the AD7192BRUZ module includes an AIN1 pin, an AIN2 pin, an AIN3 pin and an AIN4 pin to connect four acquisition chips respectively.

9. The AD7192BRUZ based turbidity measurement device according to any one of claims 1-7, wherein, The microcontroller also has a PH0-OSC_IN pin and a PH1-OSC_OUT pin to connect an external crystal Y2, the external crystal Y2 has a pin 1, a pin 2, a pin 3 and a pin 4, the pin 1 is connected to the PH0-OSC_IN pin, the pin 3 is connected to the PH1-OSC_OUT pin, the pin 2 and the pin 4 are connected to the first end of a capacitor C56 and a capacitor C65, the first end of the capacitor C56 and the capacitor C65 is grounded, the second end of the capacitor C56 is connected to the PH1-OSC_IN pin, and the second end of the capacitor C65 is connected to the PH1-OSC_OUT pin.

10. The AD7192BRUZ based turbidity measurement device according to any one of claims 1-7, wherein, The turbidimeter is an OBS turbidimeter.

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