Explosion-proof online pH meter

Abstract

The utility model relates to an explosion-proof on-line pH meter which comprises an explosion-proof casing, a main control board, a pH sensor connector, a temperature sensor connector, a split type cable connector and a liquid crystal screen. A pH measurement module, a temperature measurement module, a processing module, a display module, an integrated Hart module, a key module and an infrared remote control module are integrated on the main control board; the integrated Hart module is connected out of the split type cable connector through a data line IO and a power line Vin. The explosion-proof online pH meter system is high in integration level and low in failure rate, infrared remote control and a Hart communication support structure are added on the basis of functions of an existing explosion-proof pH meter, the explosion-proof online pH meter has the functions of field data display, remote control, remote centralized control and data transmission, meanwhile, the main control board is optimized, and the cost is reduced. And the functions of field data display, short-distance remote control and the like are expanded.

Description

Technical Field

[0001] This utility model relates to the field of water quality testing technology, specifically to an explosion-proof online pH meter. Background Technology

[0002] Existing explosion-proof pH meters are functionally insufficient, generally only allowing for on-site operation and lacking remote centralized data monitoring capabilities. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of existing explosion-proof pH meters in terms of functionality, such as the lack of remote control and data transmission capabilities, and to provide an explosion-proof online pH meter with high system integration and low failure rate. Based on the functions of existing explosion-proof pH meters, infrared remote control and HART communication support structures are added, enabling it to have both on-site data display and remote control functions, as well as remote control and data transmission functions. At the same time, the main control board is optimized to expand the functions of on-site data display and short-range remote control.

[0004] This explosion-proof online pH meter includes an explosion-proof housing, a main control board housed within the housing, pH sensor connectors and temperature sensor connectors on both sides of the housing, a separate cable connector at the bottom of the housing, and an LCD screen on the front of the housing. The main control board integrates a pH measurement module and a temperature measurement module for connecting to and conditioning the output signals of the pH and temperature sensors, a processing module for processing the conditioned signals from the pH and temperature measurement modules and performing analog-to-digital conversion, a display module for displaying the digital signals output by the processing module, an integrated HART module for transmitting the digital signals from the processing module, outputting a 4-20mA weak current signal, and powering the pH / temperature / processing / display modules, a button module for operating the processing module, and an infrared remote control module for receiving remote control signals and operating the processing module. The integrated HART module is connected from the separate cable connector via a data line (IO) and a power line (Vin).

[0005] Furthermore, the input terminals of the pH measurement module and the temperature measurement module are respectively connected to external pH sensors and temperature sensors via pH sensor connectors and temperature sensor connectors. The output terminals of the pH measurement module and the temperature measurement module are connected to the input terminal of the processing module. The output terminal of the processing module is respectively connected to the display module and the integrated HART module. The button module and the infrared remote control module are connected to the control input terminal of the processing module.

[0006] The optimized design includes a partition inside the explosion-proof housing, with holes drilled in the partition and a sealing sleeve installed. The signal lines of the pH measurement module and the temperature measurement module are routed through the sealing sleeve to connect the pH sensor connector and the temperature sensor connector.

[0007] Specifically, the pH measurement module and temperature measurement module adopt the TLC2254 signal low drift high precision amplification and conditioning circuit module, the processing module adopts the STM32L431 processor with integrated ADC high precision conversion module, and the integrated Hart module adopts the T747HL integrated Hart module.

[0008] This utility model discloses an explosion-proof online pH meter, which overcomes the shortcomings of existing explosion-proof pH meters in terms of functionality, such as the lack of remote centralized control and data transmission capabilities. It features high system integration and low failure rate. Based on the functions of existing explosion-proof pH meters, it adds infrared remote control and HART communication support structures, enabling it to have both on-site data display and remote control functions, as well as remote centralized control and data transmission functions. At the same time, the main control board is optimized to expand the functions of on-site data display and short-range remote control. Attached Figure Description

[0009] The following description, in conjunction with the accompanying drawings, further illustrates an explosion-proof online pH meter of this utility model:

[0010] Figure 1 This is a three-dimensional structural diagram of the explosion-proof online pH meter;

[0011] Figure 2 This is a wireframe diagram illustrating the logic structure and connection principle of the main control board of this explosion-proof online pH meter.

[0012] Figure 3 yes Figure 1 Internal structure diagram;

[0013] Figure 4 This is the circuit diagram of the integrated Hart module described in this explosion-proof online pH meter.

[0014] In the picture:

[0015] 1-Explosion-proof housing; 11-pH sensor connector; 12-Temperature sensor connector; 13-Partition plate; 14-Sealing cable sleeve;

[0016] 2-Main control board; 21-pH measurement module, 22-Temperature measurement module, 23-Processing module, 24-Display module, 25-Integrated HART module, 26-Button module, 27-Infrared remote control module;

[0017] 3-Separate cable connector;

[0018] 4- LCD screen. Detailed Implementation

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0020] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., 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.

[0021] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0022] Implementation method 1: such as Figure 1 , 2 As shown, this explosion-proof online pH meter includes an explosion-proof housing 1, a main control board 2 housed within the explosion-proof housing 1, pH sensor connectors 11 and temperature sensor connectors 12 located on both sides of the explosion-proof housing 1, a split-type cable connector 3 located at the bottom of the explosion-proof housing 1, and an LCD screen 4 located on the front side of the explosion-proof housing 1. The main control board 2 integrates a pH measurement module 21 and a temperature measurement module 22 for connecting the pH sensor and temperature sensor respectively and conditioning their output signals, and a processing module 2 for processing the conditioning signals output by the pH measurement module 21 and temperature measurement module 22 and performing analog-to-digital conversion. 3. A display module 24 for displaying the digital signals output by the processing module 23; an integrated HART module 25 for transmitting data from the digital signals output by the processing module 23, simultaneously outputting a 4-20mA weak current signal, and powering the pH measurement module 21 / temperature measurement module 22 / processing module 23 / display module 24; a button module 26 for operating the processing module 23; and an infrared remote control module 27 for receiving remote control signals to operate the processing module 23. The integrated HART module 25 is connected via a data line IO and a power line Vin via a detachable cable connector 3.

[0023] Implementation Method 2: The input terminals of the pH measurement module 21 and temperature measurement module 22 of this explosion-proof online pH meter are connected to external pH and temperature sensors via pH sensor connector 11 and temperature sensor connector 12, respectively. The output terminals of the pH measurement module 21 and temperature measurement module 22 are connected to the input terminal of the processing module 23. The output terminal of the processing module 23 is connected to the display module 24 and the integrated HART module 25, respectively. The button module 26 and the infrared remote control module 27 are connected to the control input terminal of the processing module 23. The remaining structures and components are as described in Implementation Method 1 and will not be repeated.

[0024] Implementation method 3: such as Figure 3 As shown, the explosion-proof housing 1 of this explosion-proof online pH meter has a partition 13 inside, with holes in the partition 13 and a sealing sleeve 14 installed. The signal lines of the pH measurement module 21 and the temperature measurement module 22 are routed through the sealing sleeve 14 to connect the pH sensor connector 11 and the temperature sensor connector 12. This prevents air and water from entering the space where the main control board is located, thus preventing malfunctions. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0025] Implementation Method 4: The pH measurement module 21 and temperature measurement module 22 of this explosion-proof online pH meter adopt a TLC2254 signal low-drift, high-precision amplification and conditioning circuit module; the processing module 23 adopts an STM32L431 processor with an integrated ADC high-precision conversion module; the integrated Hart module 25 adopts a T747HL integrated Hart module. The specific model selection for core components to achieve targeted functions includes, for example... Figure 4 As shown, the T747HL integrated HART module uses a two-wire current supply to power all functional modules in the instrument, while also outputting a 4-20mA signal. It communicates with the host computer via the HART modulation chip AD5700. The remaining structure and components are as described in Embodiment 1 and will not be repeated.

[0026] During operation: The pH measurement module and temperature measurement module are connected to external pH and temperature sensors to collect signals. After signal conditioning and amplification by the measurement modules, the signals are input to the STM32L431 for signal processing. After analog-to-digital conversion, the signals are sent to the display module for display on the LCD screen and to the integrated HART module. The data is then transmitted to the host computer via the HART modulation chip AD5700 for online centralized data and status monitoring. At the same time, after voltage regulation, the signal is sent to the output module for voltage-to-current conversion to output a 4-20mA weak current signal for IoT connection with other devices.

[0027] This explosion-proof online pH meter overcomes the shortcomings of existing explosion-proof pH meters, such as insufficient functionality and lack of remote centralized control and data transmission capabilities. It features high system integration and low failure rate. Based on the existing functions of explosion-proof pH meters, it adds infrared remote control and HART communication support structures, enabling it to have both on-site data display and remote control functions, as well as remote centralized control and data transmission functions. At the same time, the main control board has been optimized to expand functions such as on-site data display and short-range remote control.

[0028] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An explosion-proof online pH meter, characterized in that: Includes an explosion-proof housing (1), a main control board (2) housed within the explosion-proof housing (1), pH sensor connectors (11) and temperature sensor connectors (12) located on both sides of the explosion-proof housing (1), a split-type cable connector (3) located at the bottom of the explosion-proof housing (1), and an LCD screen (4) located on the front side of the explosion-proof housing (1); wherein, The main control board (2) integrates a pH measurement module (21) and a temperature measurement module (22) for connecting the pH sensor and the temperature sensor respectively and conditioning their output signals, a processing module (23) for processing the conditioning signals output by the pH measurement module (21) and the temperature measurement module (22) and performing analog-to-digital conversion, a display module (24) for displaying the digital signals output by the processing module (23), an integrated Hart module (25) for transmitting the digital signals output by the processing module (23) remotely, outputting a 4-20mA weak current signal, and supplying power to the pH measurement module (21) / temperature measurement module (22) / processing module (23) / display module (24), a button module (26) for performing functional operations on the processing module (23), and an infrared remote control module (27) for receiving remote control signals to perform functional operations on the processing module (23); the integrated Hart module (25) is connected through a data line IO and a power line Vin self-detachable cable connector (3).

2. The explosion-proof online pH meter according to claim 1, characterized in that: The pH measurement module (21) and temperature measurement module (22) adopt the TLC2254 signal low drift high precision amplification and conditioning circuit module, the processing module (23) adopts the STM32L431 processor with integrated ADC high precision conversion module; the integrated Hart module (25) adopts the T747HL integrated Hart module.

Images