Load circuit compatible with power supply and communication of various water quality sensors

Abstract

The utility model discloses a load circuit compatible with power supply and communication of various water quality sensors. The load circuit comprises a power supply circuit module and a communication circuit module, the power supply circuit module comprises a 220V alternating current power supply circuit module, a direct current power supply circuit module and an alternating current and direct current power supply switching circuit module; the output end of the alternating current and direct current power supply switching circuit module is connected with a power supply protection circuit module; the communication circuit module comprises an RS485 communication circuit module, an RS232 communication circuit module and a voltage conversion circuit module, the RS232 communication circuit module is connected with the output end of the RS485 communication circuit module, the voltage conversion circuit module supplies power to the RS485 communication circuit module and the RS232 communication circuit module, the RS485 communication circuit module is connected with the output end of an external water quality sensor, and the RS232 communication circuit module is connected with the data acquisition controller. According to the utility model, the integration level of the system is greatly improved, the production and assembly of equipment are facilitated, the field installation and debugging work is simplified, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of water quality testing technology, specifically relating to a load circuit that is compatible with the power supply and communication of multiple water quality sensors. Background Technology

[0002] Most existing digital water quality sensors use DC power supply and RS485 communication interface; existing data acquisition controllers include one RS485 interface and one RS232 interface. Water quality monitoring sensors use different address bus modes, and the controller can realize data acquisition from multiple water quality sensors.

[0003] The data acquisition controller only has one RS485 interface. In bus mode, multiple water quality sensors can be connected as long as the sensor addresses are different. However, with only one interface, wiring may be inconvenient, or even if connected, the wiring may be unreliable and unsightly. In addition, the controller does not have a power output port and cannot power the sensors, which brings inconvenience to the integration of the entire system and subsequent installation and maintenance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a load circuit that is compatible with the power supply and communication of multiple water quality sensors, which greatly improves the system integration, facilitates the production and assembly of equipment, simplifies on-site installation and commissioning, and greatly improves production efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a load circuit compatible with the power supply and communication of multiple water quality sensors, including a power supply circuit module and a communication circuit module;

[0006] The power supply circuit module includes a 220V AC power supply circuit module, a DC power supply circuit module, and an AC / DC power supply switching circuit module. The 220V AC power supply circuit module and the DC power supply circuit module are both connected to the AC / DC power supply switching circuit module. The output terminal of the AC / DC power supply switching circuit module is connected to a power protection circuit module.

[0007] The communication circuit module includes an RS485 communication circuit module and an RS232 communication circuit module connected to the output terminal of the RS485 communication circuit module, as well as a voltage conversion circuit module that supplies power to the RS485 and RS232 communication circuit modules. The RS485 communication circuit module is connected to the output terminal of an external water quality sensor and is used to collect data from the external water quality sensor. The RS232 communication circuit module is connected to a data acquisition controller and is used for the data acquisition controller to output data to the outside world. The input terminal of the voltage conversion circuit module is connected to the output terminal of the power protection circuit module.

[0008] The aforementioned load circuit, compatible with power supply and communication for multiple water quality sensors, includes a 220V AC power supply circuit module comprising a three-pin connector J8, a four-pin connector J9, and a fuse F1. Pin 1 of the three-pin connector J8 is connected to the live wire of the 220V AC power supply, pin 2 is connected to the neutral wire, and pin 3 is connected to the ground wire and grounded via resistor R1. The input terminal of the fuse F1 is connected to pin 1 of the three-pin connector J8, and the output terminal is connected to pin 1 of the four-pin connector J9, and also connected to one end of a parallel voltage regulator ZV1 and capacitor C1. The other end of the parallel voltage regulator ZV1 and capacitor C1 is connected to pin 2 of the four-pin connector J9. Pin 3 of the four-pin connector J9 is the DC voltage output terminal of the 220V AC power supply circuit module, and pin 4 of the four-pin connector J9 is grounded.

[0009] The aforementioned load circuit, which is compatible with the power supply and communication of multiple water quality sensors, includes a DC power supply circuit module comprising a three-pin connector J7. The first pin of the three-pin connector J7 is grounded, and the second pin of the three-pin connector J7 is connected to the output terminal of the DC power supply.

[0010] The aforementioned load circuit compatible with power supply and communication for multiple water quality sensors includes an AC / DC power supply switching circuit module comprising a single-pole double-throw switch SW1. The first pin of the single-pole double-throw switch SW1 is connected to the second pin of the three-pin connector J7. The second pin of the single-pole double-throw switch SW1 is the output terminal of the AC / DC power supply switching circuit module. The third pin of the single-pole double-throw switch SW1 is connected to the third pin of the four-pin connector J9.

[0011] The aforementioned load circuit, compatible with power supply and communication for multiple water quality sensors, includes a power protection circuit module comprising a fuse F2 and a bidirectional Zener diode D1. The input terminal of the fuse F2 is connected to the output terminal of the AC / DC power supply switching circuit module, and the output terminal of the fuse F2 is the voltage output terminal of the power protection circuit module, which is grounded after being connected to the bidirectional Zener diode D1.

[0012] The aforementioned load circuit, compatible with power supply and communication for multiple water quality sensors, includes an RS485 communication circuit module comprising a UART-to-RS485 chip U3 and an RS232 communication circuit module comprising an RS232-to-UART chip U2. The first data transmission terminal of the UART-to-RS485 chip U3 is connected to the output terminal of an external water quality sensor, and the second data transmission terminal of the UART-to-RS485 chip U3 is connected to the first data transmission terminal of the RS232-to-UART chip U2. The second data transmission terminal of the RS232-to-UART chip U2 is connected to the UART of the data acquisition controller.

[0013] The above-mentioned load circuit is compatible with the power supply and communication of multiple water quality sensors. The voltage conversion circuit module includes a voltage conversion chip U1 and a switch L1. The input pin of the voltage conversion chip U1 is connected to the output pin of the power protection circuit module. The output pin of the voltage conversion chip U1 is connected to one end of the switch L1. The other end of the switch L1 is the output pin of the voltage conversion circuit module.

[0014] Compared with the prior art, this utility model has the following advantages: This utility model can realize the power supply and communication of multiple water quality sensors, which has a significant effect on simplifying the system design and installation workload in system integration, greatly improving the system integration, facilitating the production and assembly of equipment, simplifying on-site installation and debugging work, and greatly improving production efficiency.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a circuit block diagram of the present invention;

[0017] Figure 2 The circuit diagrams for the 220V AC power supply circuit module, DC power supply circuit module, and AC / DC power supply switching circuit module of this utility model are shown below.

[0018] Figure 3 The circuit diagrams for the AC / DC power supply switching circuit module and the power protection circuit module of this utility model are shown below.

[0019] Figure 4 This is the circuit schematic diagram of the RS485 communication circuit module of this utility model;

[0020] Figure 5 This is a circuit schematic diagram of the RS232 communication circuit module of this utility model;

[0021] Figure 6 This is a circuit diagram of the voltage conversion circuit module of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1—220V AC power supply circuit module; 2—DC power supply circuit module; 3—AC / DC power supply switching circuit module; 4—Power protection circuit module; 5—Voltage conversion circuit module; 6—RS485 communication circuit module; 7—RS232 communication circuit module; 8—Water quality sensor; 9—Data acquisition controller. Detailed Implementation

[0024] like Figure 1 As shown, the load circuit of this utility model, which is compatible with the power supply and communication of various water quality sensors, includes a power supply circuit module and a communication circuit module.

[0025] The power supply circuit module includes a 220V AC power supply circuit module 1, a DC power supply circuit module 2, and an AC / DC power supply switching circuit module 3. The 220V AC power supply circuit module 1 and the DC power supply circuit module 2 are both connected to the AC / DC power supply switching circuit module 3. The output terminal of the AC / DC power supply switching circuit module 3 is connected to a power protection circuit module 4.

[0026] The communication circuit module includes an RS485 communication circuit module 6 and an RS232 communication circuit module 7 connected to the output terminal of the RS485 communication circuit module 6, as well as a voltage conversion circuit module 5 that supplies power to the RS485 communication circuit module 6 and the RS232 communication circuit module 7. The RS485 communication circuit module 6 is connected to the output terminal of an external water quality sensor 8 and is used to collect data from the external water quality sensor 8. The RS232 communication circuit module 7 is connected to a data acquisition controller 9 and is used for data output from the data acquisition controller 9. The input terminal of the voltage conversion circuit module 5 is connected to the output terminal of the power protection circuit module 4.

[0027] like Figure 2 and Figure 3As shown, in this embodiment, the 220V AC power supply circuit module 1 includes a three-pin connector J8, a four-pin connector J9, and a fuse F1. The first pin of the three-pin connector J8 is connected to the live wire of the 220V AC power supply, the second pin of the three-pin connector J8 is connected to the neutral wire of the 220V AC power supply, and the third pin of the three-pin connector J8 is connected to the ground wire of the 220V AC power supply and grounded through a resistor R1. The input terminal of the fuse F1 is connected to the first pin of the three-pin connector J8, the output terminal of the fuse F1 is connected to the first pin of the four-pin connector J9, and is connected to one end of a parallel voltage regulator ZV1 and a capacitor C1. The other end of the parallel voltage regulator ZV1 and the capacitor C1 is connected to the second pin of the four-pin connector J9. The third pin of the four-pin connector J9 is the DC voltage output terminal of the 220V AC power supply circuit module 1, and the fourth pin of the four-pin connector J9 is grounded.

[0028] Specifically, the DC voltage output of the 220V AC power supply circuit module 1 is 24V.

[0029] In this embodiment, the DC power supply circuit module 2 includes a three-pin connector J7, the first pin of the three-pin connector J7 is grounded, and the second pin of the three-pin connector J7 is connected to the output terminal of the DC power supply.

[0030] Specifically, the output voltage of the DC power supply is 24V.

[0031] In this embodiment, the AC / DC power supply switching circuit module 3 includes a single-pole double-throw switch SW1. The first pin of the single-pole double-throw switch SW1 is connected to the second pin of the three-pin connector J7. The second pin of the single-pole double-throw switch SW1 is the output terminal of the AC / DC power supply switching circuit module 3. The third pin of the single-pole double-throw switch SW1 is connected to the third pin of the four-pin connector J9.

[0032] In this embodiment, the power protection circuit module 4 includes a fuse F2 and a bidirectional Zener diode D1. The input terminal of the fuse F2 is connected to the output terminal of the AC / DC power supply switching circuit module 3, and the output terminal of the fuse F2 is the voltage output terminal of the power protection circuit module 4, and is grounded after being connected to the bidirectional Zener diode D1.

[0033] Specifically, the voltage output of the power protection circuit module 4 is 24V.

[0034] like Figure 4 , Figure 5 and Figure 6As shown, in this embodiment, the RS485 communication circuit module 6 includes a UART to RS485 chip U3, and the RS232 communication circuit module 7 includes an RS232 to UART chip U2. The first data transmission terminal of the UART to RS485 chip U3 is connected to the output terminal of the external water quality sensor 8, the second data transmission terminal of the UART to RS485 chip U3 is connected to the first data transmission terminal of the RS232 to UART chip U2, and the second data transmission terminal of the RS232 to UART chip U2 is connected to the UART of the data acquisition controller 9.

[0035] This invention enables the conversion of a 232 interface to a 485 interface.

[0036] In this embodiment, the voltage conversion circuit module 5 includes a voltage conversion chip U1 and a switch L1. The input pin of the voltage conversion chip U1 is connected to the output pin of the power protection circuit module 4, and the output pin of the voltage conversion chip U1 is connected to one end of the switch L1. The other end of the switch L1 is the output pin of the voltage conversion circuit module 5.

[0037] Specifically, the voltage output of the voltage conversion circuit module 5 is 3.3V. The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on the utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A load circuit compatible with power supply and communication for multiple water quality sensors, characterized in that: Includes a power supply circuit module and a communication circuit module; The power supply circuit module includes a 220V AC power supply circuit module (1), a DC power supply circuit module (2), and an AC / DC power supply switching circuit module (3). The 220V AC power supply circuit module (1) and the DC power supply circuit module (2) are both connected to the AC / DC power supply switching circuit module (3). The output terminal of the AC / DC power supply switching circuit module (3) is connected to a power protection circuit module (4). The communication circuit module includes an RS485 communication circuit module (6) and an RS232 communication circuit module (7) connected to the output of the RS485 communication circuit module (6), and a voltage conversion circuit module (5) that supplies power to the RS485 communication circuit module (6) and the RS232 communication circuit module (7). The RS485 communication circuit module (6) is connected to the output of an external water quality sensor (8) and is used to collect data from the external water quality sensor (8). The RS232 communication circuit module (7) is connected to a data acquisition controller (9) and is used for the data acquisition controller (9) to output data to the outside. The input of the voltage conversion circuit module (5) is connected to the output of the power protection circuit module (4).

2. A load circuit compatible with power supply and communication for multiple water quality sensors as described in claim 1, characterized in that: The 220V AC power supply circuit module (1) includes a three-pin connector J8, a four-pin connector J9, and a fuse F1. The first pin of the three-pin connector J8 is connected to the live wire of the 220V AC power supply, the second pin of the three-pin connector J8 is connected to the neutral wire of the 220V AC power supply, and the third pin of the three-pin connector J8 is connected to the ground wire of the 220V AC power supply and is grounded through a resistor R1. The input terminal of the fuse F1 is connected to the first pin of the three-pin connector J8, the output terminal of the fuse F1 is connected to the first pin of the four-pin connector J9, and is connected to one end of a parallel voltage regulator ZV1 and a capacitor C1. The other end of the parallel voltage regulator ZV1 and the capacitor C1 is connected to the second pin of the four-pin connector J9. The third pin of the four-pin connector J9 is the DC voltage output terminal of the 220V AC power supply circuit module (1), and the fourth pin of the four-pin connector J9 is grounded.

3. A load circuit compatible with power supply and communication for multiple water quality sensors as described in claim 2, characterized in that: The DC power supply circuit module (2) includes a three-pin connector J7, the first pin of the three-pin connector J7 is grounded, and the second pin of the three-pin connector J7 is connected to the output terminal of the DC power supply.

4. A load circuit compatible with power supply and communication for multiple water quality sensors as described in claim 3, characterized in that: The AC / DC power supply switching circuit module (3) includes a single-pole double-throw switch SW1. The first pin of the single-pole double-throw switch SW1 is connected to the second pin of the three-pin connector J7. The second pin of the single-pole double-throw switch SW1 is the output terminal of the AC / DC power supply switching circuit module (3). The third pin of the single-pole double-throw switch SW1 is connected to the third pin of the four-pin connector J9.

5. A load circuit compatible with power supply and communication for multiple water quality sensors as described in claim 4, characterized in that: The power protection circuit module (4) includes a fuse F2 and a bidirectional Zener diode D1. The input terminal of the fuse F2 is connected to the output terminal of the AC / DC power supply switching circuit module (3). The output terminal of the fuse F2 is the voltage output terminal of the power protection circuit module (4) and is grounded after being connected to the bidirectional Zener diode D1.

6. A load circuit compatible with power supply and communication for multiple water quality sensors as described in claim 5, characterized in that: The RS485 communication circuit module (6) includes a UART to RS485 chip U3, and the RS232 communication circuit module (7) includes an RS232 to UART chip U2. The first data transmission terminal of the UART to RS485 chip U3 is connected to the output terminal of an external water quality sensor (8), the second data transmission terminal of the UART to RS485 chip U3 is connected to the first data transmission terminal of the RS232 to UART chip U2, and the second data transmission terminal of the RS232 to UART chip U2 is connected to the UART of the data acquisition controller (9).

7. A load circuit compatible with power supply and communication for multiple water quality sensors as described in claim 5, characterized in that: The voltage conversion circuit module (5) includes a voltage conversion chip U1 and a switch L1. The input pin of the voltage conversion chip U1 is connected to the output pin of the power protection circuit module (4). The output pin of the voltage conversion chip U1 is connected to one end of the switch L1. The other end of the switch L1 is the output pin of the voltage conversion circuit module (5).

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