Explosion-proof online conductivity meter

Abstract

The utility model relates to an explosion-proof on-line conductivity meter which comprises an explosion-proof casing, a main control board, a conductivity sensor connector, a temperature sensor connector, a split type cable connector and a liquid crystal screen. A conductivity 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 and the power supply module are connected out of the split type cable connector through a data line IO and a power line Vin. The explosion-proof on-line conductivity meter is high in system integration level and low in failure rate, infrared remote control and Hart communication support structures are added on the basis of functions of an existing explosion-proof conductivity meter, the explosion-proof on-line conductivity 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 explosion-proof on-line conductivity meter is convenient to use. And the functions of field data display, short-distance remote control and the like are expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to an explosion-proof online conductivity meter. Background Art

[0002] Existing explosion-proof conductivity meters are insufficiently functional and generally can only be operated on-site, without remote centralized data monitoring capabilities. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the defects of the existing explosion-proof conductivity meter in insufficient functionality and lack of remote centralized control and data transmission functions, and to provide an explosion-proof online conductivity meter with high system integration and low failure rate. On the basis of the functions of the existing explosion-proof conductivity meter, infrared remote control and Hart communication support structure are added, so that it has 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 such as on-site data display and short-distance remote control.

[0004] The explosion-proof online conductivity meter includes an explosion-proof casing, a main control board arranged in the explosion-proof casing, conductivity sensor connectors and temperature sensor connectors arranged on both sides of the explosion-proof casing, a split cable connector arranged at the bottom of the explosion-proof casing, and a liquid crystal screen arranged on the front side of the explosion-proof casing; wherein, the main control board is integrated with a conductivity measurement module and a temperature measurement module for connecting the conductivity sensor and the temperature sensor respectively and conditioning the output signals of the two, a processing module for processing the conditioned signals output by the conductivity measurement module and the temperature measurement module and performing analog-to-digital conversion, a display module for displaying the digital signal output by the processing module, a remote data transmission module for the digital signal output by the processing module, and a 4-20mA weak current signal output at the same time. An integrated HART module is provided for supplying power to the conductivity measurement module / temperature measurement module / processing module / display module, a key module for performing functional operations on the processing module, and an infrared remote control module for receiving remote control signals to perform functional operations on the processing module; a cluster sleeve is provided on the cable connector, and a plurality of branching grooves are opened at the lower part of the cluster sleeve. The integrated HART module is connected uniformly from the split cable connector along the cluster sleeve through the data line IO and the power line Vin, and the lines are branched and arranged through the branching grooves; a partition is provided in the explosion-proof casing, and a hole is opened on the partition and a sealing wire sleeve is installed. The signal lines of the conductivity measurement module and the temperature measurement module are connected to the conductivity sensor connector and the temperature sensor connector through the sealing wire sleeve.

[0005] Furthermore, the input ends of the conductivity measurement module and the temperature measurement module are connected to the external conductivity sensor and the temperature sensor via the conductivity sensor connector and the temperature sensor connector respectively, the output ends of the conductivity measurement module and the temperature measurement module are connected to the input end of the processing module, and the output end of the processing module is respectively connected to the display module, the integrated Hart module, the button module and the infrared remote control module and the control input end of the processing module.

[0006] Specifically, the conductivity measurement module and the temperature measurement module adopt the TLC2254 signal low drift high precision amplification and conditioning circuit module, the processing circuit adopts the STM32L431 processor integrated with the ADC high precision conversion module; the integrated Hart communication module adopts the T747HL integrated Hart module.

[0007] The utility model discloses an explosion-proof online conductivity meter, which overcomes the defects of existing explosion-proof conductivity meters such as insufficient functionality and lack of remote centralized control and data transmission functions. The system has high system integration and low failure rate. On the basis of the functions of existing explosion-proof conductivity meters, infrared remote control and Hart communication support structure are added, so that the meter has 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 such as on-site data display and short-distance remote control. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The following is a further description of the utility model of an explosion-proof online conductivity meter in conjunction with the accompanying drawings:

[0009] Figure 1 This is a schematic diagram of the three-dimensional structure of the explosion-proof online conductivity meter;

[0010] Figure 2 yes Figure 1 Schematic diagram of the internal structure;

[0011] Figure 3 This is the logic structure and connection principle wireframe diagram of the main control board of this explosion-proof online conductivity meter;

[0012] Figure 4 This is the circuit diagram of the integrated Hart module described in this explosion-proof online conductivity meter.

[0013] In the picture:

[0014] 1- explosion-proof housing; 11- conductivity sensor connector, 12- temperature sensor connector, 13- partition, 14- sealing wire sleeve;

[0015] 2-main control board; 21-conductivity measurement module, 22-temperature measurement module, 23-processing module, 24-display module, 25-integrated Hart module, 26-button module, 27-infrared remote control module;

[0016] 3-split cable connector; 31-clustering sleeve, 32-branching trough;

[0017] 4-LCD screen. DETAILED DESCRIPTION

[0018] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0019] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] The technical solution of the present invention is further described below with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0021] Implementation method 1: Figures 1 to 3As shown, the explosion-proof online conductivity meter includes an explosion-proof casing 1, a main control board 2 arranged in the explosion-proof casing 1, a conductivity sensor connector 11 and a temperature sensor connector 12 arranged on both sides of the explosion-proof casing 1, a split cable connector 3 arranged at the bottom of the explosion-proof casing 1, and an LCD screen 4 arranged on the front side of the explosion-proof casing 1; wherein, the main control board 2 is integrated with a conductivity measurement module 21 and a temperature measurement module 22 for connecting the conductivity sensor and the temperature sensor respectively and conditioning the output signals of the two, a processing module 23 for processing the conditioned signals output by the conductivity measurement module 21 and the temperature measurement module 22 and performing analog-to-digital conversion, a display module 24 for displaying the digital signal output by the processing module 23, a display module 24 for remotely transmitting the digital signal output by the processing module 23, outputting a 4-20mA weak current signal at the same time, and displaying the conductivity measurement module 21 / temperature measurement module 22. An integrated HART module 25 powered by the block 22 / processing module 23 / display module 24, a key 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; a cluster sleeve 31 is provided on the cable connector 3, and a plurality of branching grooves 32 are opened at the lower part of the cluster sleeve 31. The integrated HART module 25 is uniformly connected from the split cable connector 3 along the cluster sleeve 31 through the data line IO and the power line Vin, and the lines are branched and arranged through the branch groove 32; a partition 13 is provided in the explosion-proof casing 1, and a hole is opened on the partition 13 and a sealing wire sleeve 14 is installed. The signal lines of the conductivity measurement module 21 and the temperature measurement module 22 are connected to the conductivity sensor connector 11 and the temperature sensor connector 12 through the sealing wire sleeve 14 to prevent air and water intake failure in the space where the main control board is located.

[0022] Implementation 2: The inputs of the conductivity measurement module 21 and temperature measurement module 22 of this explosion-proof online conductivity meter are connected to external conductivity and temperature sensors via the conductivity sensor connector 11 and temperature sensor connector 12, respectively. The outputs of the conductivity measurement module 21 and temperature measurement module 22 are connected to the input of the processing module 23. The output of the processing module 23 is connected to the display module 24 and integrated HART module 25, respectively. The key module 26 and infrared remote control module 27 are connected to the control input of the processing module 23. The remaining structure and components are as described in Implementation 1 and will not be repeated here.

[0023] Implementation 3: The conductivity measurement module 21 and temperature measurement module 22 of this explosion-proof online conductivity meter use the TLC2254 signal low drift high precision amplification and conditioning circuit module, the processing circuit 23 uses the STM32L431 processor integrated with the ADC high precision conversion module; the integrated Hart communication module 25 uses the T747HL integrated Hart module. As the core component to achieve the specific model selection of targeted functions, among which, Figure 4 As shown, the T747HL integrated HART module uses a two-wire current system to power all functional modules in the instrument. It can also output a 4-20mA signal and communicate with the host computer through the HART modulation and resolution chip AD5700. The remaining structure and components are as described in Implementation 1 and will not be repeated here.

[0024] During operation: the conductivity measurement module and the temperature measurement module are connected to the conductivity sensor and the temperature sensor to collect signals. After signal conditioning and amplification by the measurement modules, the signals are input into the STM32L431 for signal processing. After analog-to-digital conversion, they are sent to the display module for display on the LCD screen, and sent to the integrated HART module for data remote transmission through the HART modulation and mediation chip AD5700 for online centralized data and status monitoring. At the same time, after voltage regulation, they are sent to the output module for voltage-current conversion to output 4-20mA weak current signal for connection with other devices.

[0025] This explosion-proof online conductivity meter overcomes the shortcomings of existing explosion-proof conductivity meters, such as insufficient functionality and lack of remote centralized control and data transmission functions. It has high system integration and low failure rate. Based on the functions of existing explosion-proof conductivity meters, it adds infrared remote control and Hart communication support structure, so that it has 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 functions such as on-site data display and short-distance remote control.

[0026] The above description shows the main features, basic principles, and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments or examples, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the above embodiments or examples should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An explosion-proof online conductivity meter, characterized by: The invention comprises an explosion-proof housing (1), a main control board (2) arranged in the explosion-proof housing (1), a conductivity sensor connector (11) and a temperature sensor connector (12) arranged on both sides of the explosion-proof housing (1), a split cable connector (3) arranged at the bottom of the explosion-proof housing (1), and a liquid crystal screen (4) arranged on the front side of the explosion-proof housing (1); wherein, The main control board (2) is integrated with a conductivity measurement module (21) and a temperature measurement module (22) for respectively connecting to a conductivity sensor and a temperature sensor and conditioning the output signals of the two, a processing module (23) for processing the conditioned signals output by the conductivity measurement module (21) and the temperature measurement module (22) and performing analog-to-digital conversion, a display module (24) for displaying the digital signal output by the processing module (23), an integrated Hart module (25) for remotely transmitting data of the digital signal output by the processing module (23), simultaneously outputting a 4-20 mA weak current signal, and supplying power to the conductivity measurement module (21) / temperature measurement module (22) / processing module (23) / display module (24), and a key for performing functional operations on the processing module (23). The invention relates to a device for processing a temperature sensor module (23) and an infrared remote control module (27) for receiving remote control signals to perform functional operations on the processing module (23); a cluster sleeve (31) is provided on the cable connector (3), and a plurality of branching grooves (32) are opened at the lower part of the cluster sleeve (31); the integrated Hart module (25) is connected uniformly from the split cable connector (3) along the cluster sleeve (31) through the data line IO and the power line Vin, and the lines are branched and arranged through the branching grooves (32); a partition (13) is provided in the explosion-proof housing (1), and a hole is opened on the partition (13) and a sealing wire sleeve (14) is installed. The signal lines of the conductivity measurement module (21) and the temperature measurement module (22) are connected to the conductivity sensor connector (11) and the temperature sensor connector (12) through the sealing wire sleeve (14).

2. The explosion-proof online conductivity meter according to claim 1, characterized in that: The input ends of the conductivity measurement module (21) and the temperature measurement module (22) are connected to the external conductivity sensor and the temperature sensor via the conductivity sensor connector (11) and the temperature sensor connector (12), respectively; the output ends of the conductivity measurement module (21) and the temperature measurement module (22) are connected to the input end of the processing module (23); the output end of the processing module (23) is connected to the display module (24), the integrated Hart module (25), the key module (26), and the infrared remote control module (27) and the control input end of the processing module (23).

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