Connectors and water quality testers

Abstract

This application relates to the field of connector technology for sensors, and discloses a connector and a water quality analyzer. The connector includes: a first adapter circuit, configured in the host computer of the water quality analyzer, for converting the RS485 communication signal of the host computer into an on / off control signal; a cable, one end of which is electrically connected to the first adapter circuit for transmitting the on / off control signal; a first connector, electrically connected to the other end of the cable, having a pin inside for outputting the on / off control signal; a second connector, for fixing to the sensor of the water quality analyzer, having a socket with an electrical contact inside; and a second adapter circuit, configured in the sensor and electrically connected to the electrical contact; wherein the first and second connectors are plugged in to insert the pin into the socket and make contact with the electrical contact, and the second adapter circuit converts the on / off control signal output by the pin into an RS485 communication signal. This application reduces the fault tolerance of the water quality analyzer.

Description

Technical Field

[0001] This application relates to the field of connector technology for sensors, specifically to a connector and a water quality analyzer. Background Technology

[0002] With rapid industrialization and urbanization, water pollution has become increasingly serious, making real-time monitoring of environmental water quality crucial. Water quality analyzers can continuously and automatically monitor various parameters in water bodies, providing timely and accurate data support for water resource protection and pollution control.

[0003] Sensors are crucial components of water quality analyzers. Placed within water bodies, they convert physical, chemical, and biological parameters into electrical or optical signals. These signals are then transmitted via connectors and cables to a host computer located outside the water body for analysis and processing, yielding parameters such as pH, dissolved oxygen (DO), chemical oxygen demand (COD), and ammonia nitrogen. Water quality parameters, etc.

[0004] Existing water quality analyzers communicate with their sensors and host computers via RS485, a differential serial communication standard that transmits signals through at least four wires: two power lines and two signal lines. Correspondingly, the cable connecting the sensor and host computer has at least four wires (hereinafter referred to as 4-core), and the connector used for this connection is also at least a 4-pin connector. Under complex underwater conditions, a failure in any of the four wires or the four pins of the connector will cause the entire water quality analyzer to malfunction, resulting in low fault tolerance.

[0005] Improving the fault tolerance of water quality testing instruments to ensure their long-term stable operation is a problem that needs to be solved. Utility Model Content

[0006] In view of the above problems, this application provides a connector and a water quality analyzer to solve the problem of low fault tolerance and inability to operate stably for a long time in the prior art.

[0007] According to one aspect of the embodiments of this application, a connector is provided, comprising:

[0008] The first adapter circuit is used to set up the host computer of the water quality tester to convert the RS485 communication signal of the host computer into an on / off key control signal.

[0009] The cable, one end of which is electrically connected to the first adapter circuit, is used to transmit the on / off key control signal;

[0010] The first connector is electrically connected to the other end of the cable. The first connector is provided with a pin, through which the power control signal is output.

[0011] The second connector is used to fix the sensor of the water quality analyzer. The second connector has a socket and an electrical contact is provided in the socket.

[0012] A second adapter circuit is provided on the sensor, and the second adapter circuit is electrically connected to the electrical contacts; wherein...

[0013] The first connector and the second connector are plugged in to insert the pin into the socket and make contact with the electrical contact. The second adapter circuit converts the on / off key control signal output by the pin into an RS485 communication signal.

[0014] In some embodiments, the cable contains two wires, the first connector contains two pins, and the second connector has two sockets, each socket containing an electrical contact.

[0015] In some embodiments, the two pins include a first pin and a second pin, and the two sockets include a first socket and a second socket. The dimensions of the first pin and the second pin are adapted to the first socket and the second socket, respectively. The diameter of the first pin is larger than the diameter of the second pin, and the diameter of the first socket is larger than the diameter of the second socket.

[0016] In some embodiments, the length of the first pin is greater than the length of the second pin.

[0017] In some embodiments, the first adapter circuit includes a first RS-485 transceiver power chip with built-in on / off keying modulation and demodulation functions. The first RS-485 transceiver power chip includes a power supply pin, a first bus input pin, a second bus input pin, a digital signal input pin, a digital signal output pin, a first bus output pin, a second bus output pin, and a ground pin.

[0018] Wherein, the first bus input pin is connected to the bus through a first series capacitor, the second bus input pin is connected to the bus through a second series capacitor, the digital signal input pin is used to connect to the controller serial port TX in the host computer and to send data to the bus, the digital signal output pin is used to connect to the controller serial port RX in the host computer and to receive bus data, the first bus output pin is connected to the bus through a third series capacitor, and the second bus output pin is connected to the bus through a fourth series capacitor.

[0019] In some embodiments, the second adapter circuit includes a second RS-485 transceiver power chip with built-in on / off keying modulation and demodulation functions. The second RS-485 transceiver power chip includes a power supply pin, a first bus input pin, a second bus input pin, a digital signal input pin, a digital signal output pin, a first bus output pin, a second bus output pin, and a ground pin.

[0020] Wherein, the first bus input pin is connected to the bus through a first series capacitor, the second bus input pin is connected to the bus through a second series capacitor, the digital signal input pin is used to connect to the controller serial port TX in the sensor and to send data to the bus, the digital signal output pin is used to connect to the controller serial port RX in the sensor and to receive bus data, the first bus output pin is connected to the bus through a third series capacitor, and the second bus output pin is connected to the bus through a fourth series capacitor.

[0021] In some embodiments, both the first connector and the second connector are made of titanium alloy.

[0022] In some embodiments, a first sealing ring is fitted on the second connector, and a sealing gasket is provided in the first connector at the position where it abuts against the second connector.

[0023] The second connector includes a threaded connector. After the first connector and the second connector are inserted, the first connector and the second connector are fixed by the threaded connector, and the first connector and the second connector press against the end face of the first sealing ring and the end face of the sealing gasket along the insertion direction of the first connector and the second connector.

[0024] In some embodiments, a groove is provided on the side wall of the first connector, and a second sealing ring is embedded in the groove;

[0025] After the first connector and the second connector are inserted, the inner wall of the first connector presses radially against the side of the second sealing ring.

[0026] According to another aspect of the embodiments of this application, a water quality analyzer is provided, comprising:

[0027] Host computer;

[0028] Sensors; and

[0029] The connector described in any of the above embodiments electrically connects the host computer and the sensor.

[0030] Compared to the 4-core and 4-pin connectors in existing water quality analyzers, this embodiment incorporates a first adapter circuit within the connector to convert the RS485 communication signal from the host computer into a power-on keying signal. This signal is then transmitted internally via power line carrier switching. A second adapter circuit converts the power-on keying signal output from the pins back into an RS485 communication signal, which is then provided to the sensor. The host computer and sensor maintain RS485 communication, ensuring uninterrupted signal communication. Furthermore, the power-on keying communication method requires fewer wires than RS485 communication, thus reducing the number of cores and pins in the connector. This improves the fault tolerance of the water quality analyzer while maintaining both power supply and digital communication functionality.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0033] Figure 1 This paper shows a structural block diagram of a water quality analyzer provided in an embodiment of this application;

[0034] Figure 2 This illustration shows a schematic diagram of the connector provided in an embodiment of this application being installed on a sensor;

[0035] Figure 3 A structural block diagram of the connector provided in an embodiment of this application is shown;

[0036] Figure 4 A schematic diagram of the connector structure provided in an embodiment of this application is shown;

[0037] Figure 5 An exploded view of the connector provided in an embodiment of this application is shown;

[0038] Figure 6 A cross-sectional view of the connector provided in an embodiment of this application is shown;

[0039] Figure 7 A circuit diagram of the first adapter circuit provided in an embodiment of this application is shown.

[0040] The reference numerals in the detailed embodiments are as follows:

[0041] Water quality analyzer 100; host computer 10; sensor 20; connector 30; top cover 21; first adapter circuit 31; cable 32; first connector 33; second connector 34; second adapter circuit 35; pin 331; socket 341; electrical contact 342; first pin 331a; second pin 331b; first socket 341a; second socket 341b; first sealing ring 36; sealing gasket 37; threaded connector 333; groove 343; second sealing ring 38. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, representing any combination of the listed objects. For example, "A and / or B" can represent three possibilities: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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 mechanical connection or an electrical connection; 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 the embodiments of this application can be understood according to the specific circumstances.

[0050] Figure 1 A structural block diagram of a water quality analyzer 100 provided in an embodiment of this application is shown. Figure 1 As shown, the water quality analyzer 100 includes a host computer 10, a sensor 20, and a connector 30. The connector 30 electrically connects the host computer 10 and the sensor 20. Through the connector 30, the host computer 10 can send control commands and request signals to the sensor 20, and the sensor 20 can transmit the collected data to the host computer 10.

[0051] The host computer 10 is a device used for remote monitoring, data acquisition, and analysis. It can be a computer, server, touch screen all-in-one machine, etc. The host computer 10 usually includes a controller, which can be a microcontroller, MCU, or other similar components. The sensor 20 is an element for detecting the physical, chemical, and biological parameters of the water body. It can be one or more sensors, such as pH sensors, dissolved oxygen sensors, chemical oxygen demand sensors, and ammonia nitrogen sensors, or a combination of these sensors. The sensor 20 also includes a controller, also known as a data processing and control unit, such as a microcontroller, MCU, or other similar components.

[0052] Both the host computer 10 and the sensor 20 use RS485 communication for signal transmission. Unlike existing technologies, the connector 30 in this application uses on-off keying (OOK) communication for signal transmission. On-off keying is a type of digital modulation technology that transmits binary information by controlling the presence or absence of a carrier signal ("1" corresponds to on, "0" corresponds to off), and is characterized by its simplicity and low power consumption.

[0053] RS485 communication requires at least four wires, two for power and two for signal. Using existing connectors, at least a four-core cable (32) and a four-pin connector are needed for data transmission. In this embodiment, a keyed on / off switch is used in connector 30 to transmit signals. Power delivery and data communication can be performed simultaneously through a single pair of wires, effectively requiring only two wires for data transmission. Connector 30 can be configured as a two-pin connector. Compared to the four-core and four-pin connectors in existing water quality analyzers, this embodiment reduces the number of cores in the cable (32) and the number of pins in connector 30, achieving both power supply and digital communication functions while improving the fault tolerance of the water quality analyzer 100.

[0054] The structure and principle of connector 30 are explained below.

[0055] Figure 2 A schematic diagram showing the installation of the connector 30 provided in an embodiment of this application on the sensor 20 is illustrated. Figure 2 As shown, the connector 30 is fixed to the upper cover plate 21 of the sensor 20. The fixing method can be threaded fixing, welding fixing or riveting fixing, etc.

[0056] Figure 3 This paper shows a structural block diagram of the connector 30 provided in an embodiment of the present application. Figure 4 This paper shows a schematic diagram of the connector 30 provided in an embodiment of this application. Figure 5 An exploded view of the connector 30 provided in an embodiment of this application is shown. Figure 6 A cross-sectional view of the connector 30 provided in an embodiment of this application is shown.

[0057] like Figures 3 to 6 As shown, the connector 30 includes a first adapter circuit 31, a cable 32, a first connector 33, a second connector 34, and a second adapter circuit 35.

[0058] The first adapter circuit 31 is installed in the host computer 10 of the water quality analyzer 100, converting the RS485 communication signal of the host computer 10 into a power on / off control signal. One end of the cable 32 is electrically connected to the first adapter circuit 31, and the other end is electrically connected to the first connector 33, for transmitting the power on / off control signal output by the first adapter circuit 31 to the first connector 33. The first connector 33 has a pin 331, through which the power on / off control signal transmitted by the cable 32 is output. The second connector 34 is fixed to the sensor 20 of the water quality analyzer 100, and the second connector 34 has a socket 341, through which an electrical contact 342 is provided. The second adapter circuit 35 is installed in the sensor 20 and electrically connected to the electrical contact 342. The first connector 33 and the second connector 34 are plugged in, and the pin 331 is inserted into the socket 341 and makes contact with the electrical contact 342, so that the second adapter circuit 35 receives the on / off key control signal output by the pin 331 and converts the on / off key control signal into an RS485 communication signal and provides it to the sensor 20.

[0059] In this manner, connector 30 converts the RS485 communication signal of the host computer 10 into a power on / off keying signal at the host computer 10 end, that is, modulates the communication data onto the power line for transmission. The power on / off keying signal is transmitted to the sensor 20 end through connector 30, and finally converted back into an RS485 communication signal at the sensor 20 end. The host computer 10 and the sensor 20 still maintain RS485 communication, without affecting their internal signal communication. Compared with RS485 communication, the power on / off keying communication method requires fewer wires, thus reducing the number of cores in cable 32 and the number of pins in connector 30. While ensuring both power supply and digital communication functions, this improves the fault tolerance of the water quality analyzer 100.

[0060] In this embodiment, the number of wires used for RS485 communication between the host computer 10 and the sensor 20 is two. Please continue reading. Figures 4 to 6 The cable 32 contains two wires, the first connector 33 contains two pins 331, and the second connector 34 has two sockets 341, each socket 341 containing an electrical contact 342. In this embodiment, signal conversion allows the two wires in the cable 32 to receive signals transmitted from the four wires of the host computer 10. The first connector 33 and the second connector 34 of the connector 30 also require only two pins for connection, reducing the number of cores and pins by half.

[0061] The two pins 331 include a first pin 331a and a second pin 331b, and the two sockets 341 include a first socket 341a and a second socket 341b. The dimensions of the first pin 331a and the second pin 331b are adapted to the first socket 341a and the second socket 341b, respectively. For example, the diameter of the first socket 341a is slightly larger than the diameter of the first pin 331a, and the diameter of the second socket 341b is slightly larger than the diameter of the second pin 331b, so that the first pin 331a can be inserted into the first socket 341a without being too loose in the first socket 341a, and the second pin 331b can be inserted into the second socket 341b without being too loose in the second socket 341b. The diameter of the first pin 331a is larger than the diameter of the second pin 331b, and the diameter of the first socket 341a is larger than the diameter of the second socket 341b, that is, the first pin 331a is thicker than the second pin 331b.

[0062] The existing connector 30 uses a 4-pin connector 30, including four pins 331, two for power and two for signal. Due to the limited cross-sectional dimensions of the connector 30, the diameter of the four pins 331 cannot be designed to be large, resulting in all four pins 331 being relatively thin. This makes the pins 331 prone to bending during the insertion of the first connector 33 and the second connector 34, leading to low reliability. In this embodiment, by reducing the number of pins 331, a thicker first pin 331a can be provided within the given cross-sectional dimensions of the connector 30, improving the structural strength and reliability of one of the pins 331.

[0063] Furthermore, in existing technologies, the pins 331 are typically of the same diameter, requiring additional foolproof structures to prevent incorrect insertion of the first connector 33 and the second connector 34. In this embodiment, by using two pins 331 of different sizes, one thick and one thin, the pins 331 achieve both communication and foolproof functions, reducing the need for additional foolproof structures, simplifying the connector 30 structure, and lowering costs.

[0064] Furthermore, the length of the first pin 331a is greater than the length of the second pin 331b. When the operator mates the first connector 33 with the second connector 34, the thicker first pin 331a can be preferentially aligned with the first socket 341a, which facilitates operation. Moreover, the thicker first pin 331a makes alignment less likely to cause bending of the first pin 331a, thus improving reliability.

[0065] The circuit structure and principle of the first adapter circuit 31 and the second adapter circuit 35 are described below.

[0066] Figure 7A circuit diagram of the first adapter circuit 31 provided in an embodiment of this application is shown. Figure 7 As shown, the first adapter circuit 31 includes a first RS-485 transceiver power chip (e.g., XF2485A) with built-in on / off keying modulation and demodulation functions. The left side of the figure shows the peripheral circuit of the first RS-485 transceiver power chip. The first RS-485 transceiver power chip includes a power supply pin (pin 1 - VCC, receiving +5VIC voltage input), a first bus input pin (pin 6 - A, input BUS AI), a second bus input pin (pin 5 - B, input BUSBI), a digital signal input pin (pin 2 - DI, input XMRXD), a digital signal output pin (pin 3 - RO, output XM TXD), a first bus output pin (pin 4 - AO, output XFAO), a second bus output pin (pin 7 - BO, output XF BO), and a ground pin (pin 8 - GND, ground).

[0067] The first bus input pin is connected to the bus via a first series capacitor C6, the second bus input pin is connected to the bus via a second series capacitor C10, the digital signal input pin is used to connect to the controller serial port TX in the host computer 10 and to send data to the bus, the digital signal output pin is used to connect to the controller serial port RX in the host computer 10 and to receive bus data, the first bus output pin is connected to the bus via a third series capacitor C1, and the second bus output pin is connected to the bus via a fourth series capacitor C5.

[0068] about Figure 7The circuit components include capacitors C1, C5, C6, and C10, which are primarily used for filtering, removing high-frequency noise from the buses (BUS+, BUS-) and suppressing high-frequency interference signals to ensure cleaner signals transmitted to subsequent circuits. Capacitors C8 and C9 further filter the analog signal path, especially targeting higher-frequency noise. Capacitors C8 and C9, in conjunction with C1, C5, C6, and C10, form a multi-stage filtering network to better suppress interference across different frequency ranges. Diodes D3 and D4 form a bidirectional clamping circuit. When the voltage on BUS+ or BUS- becomes abnormally high or low, diodes D3 and D4 clamp it within a certain voltage range, protecting subsequent circuits from overvoltage or undervoltage damage. For example, when the BUS+ voltage is too high, D3 may conduct, directing excess current to the +5V power supply; when the BUS- voltage is too low, D4 may conduct, clamping the voltage to near ground. Resistors R2 and R5 serve as current limiters and voltage dividers. The right side shows the chip's digital communication and power supply sections. Capacitor C4 is used as a power supply filter capacitor, smoothing the +5V power supply voltage and filtering out low-frequency ripple and noise, providing a stable power supply for the XF2485A chip. Capacitor C7 is used for high-frequency filtering, working with C4 to further filter out high-frequency noise in the +5V power supply.

[0069] Figure 7 The diagram shows a circuit implementation scheme with a small number of bus nodes and a light load. Pins 4-AO and 7-BO of the XF2485A chip can directly send carrier signals to the bus through capacitors C1 and C5. In other embodiments, if there are many nodes, pins 4-AO and 7-BO of the XF2485A chip can be strengthened with a push-pull circuit, which will not be elaborated here.

[0070] The second adapter circuit 35 includes a second RS-485 transceiver power chip with built-in on / off keying modulation and demodulation functions. The circuit diagram of the second RS-485 transceiver power chip and its peripheral circuits is shown in the figure. Figure 7 Similar to the diagram. The second RS-485 transceiver power chip includes a power supply pin, a first bus input pin, a second bus input pin, a digital signal input pin, a digital signal output pin, a first bus output pin, a second bus output pin, and a ground pin. The first bus input pin is connected to the bus via a first series capacitor, and the second bus input pin is connected to the bus via a second series capacitor. The digital signal input pin is used to connect to the controller serial port TX in the sensor 20 and to send data to the bus. The digital signal output pin is used to connect to the controller serial port RX in the sensor 20 and to receive bus data. The first bus output pin is connected to the bus via a third series capacitor, and the second bus output pin is connected to the bus via a fourth series capacitor.

[0071] Since the sensor 20 of the water quality analyzer 100 is typically located underwater, most of the structure of the connector 30 connecting the sensor 20 and the host computer 10 is also underwater and needs to meet waterproof requirements. Waterproof connectors 30 used underwater include aviation plugs (waterproof rating IP67), watertight connectors (waterproof rating IP68), or specially made connectors 30.

[0072] Conventional aviation plug-type connectors 30 have only one sealing ring (also known as an O-ring), and the sealing ring has no special limiting design. When different operators perform threaded connection operations on the connector 30, the loosening or tightening of the connector 30 will vary from person to person. However, the compression of the sealing ring needs to be within a certain range to ensure the sealing effect, such as the compression range of 15%-30%. When tightening the aviation plug, different people will operate with different force, resulting in different degrees of compression of the sealing ring, thus causing different waterproof effects of the connector 30. In addition, the materials of aviation plugs are mostly plastic, aluminum, or nickel-plated metal, which are not sufficiently corrosion resistant.

[0073] Although watertight connectors have good performance, they are expensive and cannot solve the problem of water leakage at the connection between cable 32 and connector 30, nor can they reduce equipment failure caused by wire breakage in the inner core of cable 32.

[0074] In this embodiment, both the first connector 33 and the second connector 34 are made of titanium alloy. By using titanium alloy, the first connector 33 and the second connector 34 can be manufactured by machining, ensuring that the deformation of the sealing ring between the two connectors after fixing is controlled within the effective sealing range, thus guaranteeing a waterproof seal. Furthermore, titanium alloy has good corrosion resistance, improving the corrosion resistance of the connector 30 and ensuring its quality of use.

[0075] like Figure 6 As shown, a first sealing ring 36 is fitted on the second connector 34, and a sealing gasket 37 is provided in the first connector 33 at the position where it abuts against the second connector 34; the second connector 34 includes a threaded connector 333. After the first connector 33 and the second connector 34 are inserted, the first connector 33 and the second connector 34 are fixed by the threaded connector 333, and the first connector 33 and the second connector 34 press the end face of the first sealing ring 36 and the end face of the sealing gasket 37 along the insertion direction Y of the first connector 33 and the second connector 34.

[0076] A groove 343 is provided on the side wall of the first connector 33, and a second sealing ring 38 is embedded in the groove 343; after the first connector 33 and the second connector 34 are inserted, the inner wall of the first connector 33 presses the side of the second sealing ring 38 radially X toward the second sealing ring 38.

[0077] Through the above design, two sealing rings and a sealing gasket 37 are provided between the first connector 33 and the second connector 34 of the connector 30. Both the first sealing ring 36 and the sealing gasket 37 are compressed in the insertion direction Y of the first connector 33 and the second connector 34, while the second sealing ring 38 is compressed in the radial direction X, with the X and Y directions perpendicular. Because the above-mentioned sealing element has a compression sealing effect in two directions, when the seal in one direction fails, at least the seal in the other direction remains effective, ensuring a certain degree of sealing effect. For example, if the threaded connector 333 is not tightened properly, the seal of the first sealing ring 36 and the sealing gasket 37 compressed along the thread tightening direction Y fails, but the seal of the second sealing ring 38 compressed along the radial direction X remains effective. For example, due to the presence of mud and sand underwater, it is easy to adhere to the inner wall of the first connector 33 and the outer wall of the second connector 34. This results in a gap between the inner walls of the second sealing ring 38 and the second connector 34 along the radial direction X of the second sealing ring 38 after they are inserted, causing the seal of the second sealing ring 38 to fail. However, the seal of the first sealing ring 36 and the sealing gasket 37, which are squeezed along the thread tightening direction Y, remains effective.

[0078] Furthermore, when there is no water inside the connector 30, the first adapter circuit 31 and the second adapter circuit 35 operate normally without short-circuiting. However, if water enters the connector 30, it will cause a near-short circuit between the communication lines. For existing connectors 30 using the 485 four-wire communication method, a short circuit or low resistance in the communication lines will result in communication failure. However, in this application, since two-wire power line carrier communication is used between the cable 32 and the inside of the connector 30, if water enters the connector 30, the near-short circuit between the two communication lines will only increase the load on the host computer 10, without causing a power outage and communication failure. Therefore, by using power line carrier communication inside the connector 30, normal communication can be guaranteed as much as possible even when a small amount of water enters the connector 30.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A connector, characterized in that, include: The first adapter circuit is used to set up the host computer of the water quality tester to convert the RS485 communication signal of the host computer into an on / off key control signal. The cable, one end of which is electrically connected to the first adapter circuit, is used to transmit the on / off key control signal; The first connector is electrically connected to the other end of the cable. The first connector is provided with a pin, through which the power control signal is output. The second connector is used to fix the sensor of the water quality analyzer. The second connector has a socket and an electrical contact is provided in the socket. A second adapter circuit is provided on the sensor, and the second adapter circuit is electrically connected to the electrical contacts; wherein... The first connector and the second connector are plugged in to insert the pin into the socket and make contact with the electrical contact. The second adapter circuit converts the on / off key control signal output by the pin into an RS485 communication signal.

2. The connector according to claim 1, characterized in that, The cable contains two wires, the first connector contains two pins, and the second connector has two sockets, each containing an electrical contact.

3. The connector according to claim 2, characterized in that, The two pins include a first pin and a second pin, and the two sockets include a first socket and a second socket. The dimensions of the first pin and the second pin are adapted to the first socket and the second socket, respectively. The diameter of the first pin is larger than the diameter of the second pin, and the diameter of the first socket is larger than the diameter of the second socket.

4. The connector according to claim 3, characterized in that, The length of the first pin is greater than the length of the second pin.

5. The connector according to claim 1, characterized in that, The first adapter circuit includes a first RS-485 transceiver power chip with built-in on / off keying modulation and demodulation functions. The first RS-485 transceiver power chip includes a power supply pin, a first bus input pin, a second bus input pin, a digital signal input pin, a digital signal output pin, a first bus output pin, a second bus output pin, and a ground pin. Wherein, the first bus input pin is connected to the bus through a first series capacitor, the second bus input pin is connected to the bus through a second series capacitor, the digital signal input pin is used to connect to the controller serial port TX in the host computer and to send data to the bus, the digital signal output pin is used to connect to the controller serial port RX in the host computer and to receive bus data, the first bus output pin is connected to the bus through a third series capacitor, and the second bus output pin is connected to the bus through a fourth series capacitor.

6. The connector according to claim 1, characterized in that, The second adapter circuit includes a second RS-485 transceiver power chip with built-in on / off keying modulation and demodulation functions. The second RS-485 transceiver power chip includes a power supply pin, a first bus input pin, a second bus input pin, a digital signal input pin, a digital signal output pin, a first bus output pin, a second bus output pin, and a ground pin. Wherein, the first bus input pin is connected to the bus through a first series capacitor, the second bus input pin is connected to the bus through a second series capacitor, the digital signal input pin is used to connect to the controller serial port TX in the sensor and to send data to the bus, the digital signal output pin is used to connect to the controller serial port RX in the sensor and to receive bus data, the first bus output pin is connected to the bus through a third series capacitor, and the second bus output pin is connected to the bus through a fourth series capacitor.

7. The connector according to claim 1, characterized in that, Both the first connector and the second connector are made of titanium alloy.

8. The connector according to claim 6, characterized in that, The second connector is fitted with a first sealing ring, and a sealing gasket is provided inside the first connector at the position where it abuts against the second connector; The second connector includes a threaded connector. After the first connector and the second connector are inserted, the first connector and the second connector are fixed by the threaded connector, and the first connector and the second connector press against the end face of the first sealing ring and the end face of the sealing gasket along the insertion direction of the first connector and the second connector.

9. The connector according to claim 8, characterized in that, A groove is provided on the side wall of the first connector, and a second sealing ring is embedded in the groove; After the first connector and the second connector are inserted, the inner wall of the first connector presses radially against the side of the second sealing ring.

10. A water quality analyzer, characterized in that, include: Host computer; sensor; as well as The connector as described in any one of claims 1-9, wherein the connector electrically connects the host computer and the sensor.

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