Valve body control system based on CAN-to-analog converter

Abstract

The invention relates to the field of valve body control, in particular to a valve body control system based on a CAN-to-analog converter. The device comprises a controller, a CAN to analog quantity converter and a valve body assembly. The controller is in communication connection with the CAN-to-analog converter and the valve body assembly, the controller sends a control instruction to the CAN-to-analog converter through a CAN bus, the CAN-to-analog converter converts a CAN signal of the controller into an analog signal and is used for controlling the valve body assembly, and the controller receives feedback signal data of the valve body assembly. The CAN to analog quantity converter plays a role in overlapping a digital communication protocol and an analog quantity signal, can meet scene requirements on flexibility and compatibility requirements, and converts a CAN signal instruction sent by the controller into the analog quantity signal, thereby realizing accurate control of the valve body.

Description

Technical Field

[0001] This invention relates to the field of valve body control, and in particular to a valve body control system based on a CAN-to-analog converter. Background Technology

[0002] In industrial automation scenarios and bench testing, valve control may employ analog control (such as 4-20mA or 0-10V signals). This involves continuously adjusting the input signal to precisely control parameters such as valve opening, flow rate, or pressure. This control method offers smooth, stepless adjustment, making it suitable for process control applications requiring high precision and dynamic response. Analog control can be integrated with PLCs or PID controllers to respond in real-time to sensor and valve feedback, forming a closed-loop control system that optimizes process stability and energy efficiency.

[0003] The current method of directly controlling the valve body using analog signals places high demands on the communication method of the upper-level controller, requiring it to support analog output control. However, during bench testing, PLCs or other controllers may not be used, and existing controllers only support high / low side drive, CAN communication, and other control methods. Current technology cannot accommodate digital communication protocols and analog signals. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a valve body control system based on a CAN-to-analog converter. The CAN-to-analog converter serves to bridge the digital communication protocol and analog signals, meeting the requirements of various scenarios in terms of flexibility and compatibility. It converts the CAN signal commands issued by the controller into analog signals, thereby achieving precise control of the valve body.

[0005] The technical solution of this invention is a valve body control system based on a CAN-to-analog converter, comprising a controller, a CAN-to-analog converter, and a valve body assembly. The controller is communicatively connected to both the CAN-to-analog converter and the valve body assembly. The controller sends control commands to the CAN-to-analog converter via a CAN bus. The CAN-to-analog converter converts the controller's CAN signals into analog signals and uses them to control the valve body assembly. The controller receives feedback signal data from the valve body assembly.

[0006] Preferably, the analog quantity is a 4-20mA standard analog quantity.

[0007] Preferably, the valve body assembly includes an adjustable valve body 1, an adjustable valve body 2, and an adjustable valve body 3. Each adjustable valve body adjusts its own opening state according to the analog signal command and feeds back the current opening state data to the controller.

[0008] Preferably, the CAN-to-analog converter is connected to the adjustable valve body 1, adjustable valve body 2 and adjustable valve body 3 for communication and control, and the adjustable valve body 1, adjustable valve body 2 and adjustable valve body 3 are connected to the controller for communication.

[0009] Preferably, the downlink sequence of the control system commands is: controller, CAN bus, CAN to analog controller, 4-20mA standard analog signal and valve body assembly, and the uplink sequence of the feedback signals is: valve body assembly, 4-20mA signal and controller.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects: the CAN to analog converter plays the role of connecting digital communication protocol and analog signal, ensuring stable and accurate operation of the system, converting the CAN signal command issued by the controller into analog signal, accurately controlling the adjustable valve body, and the controller receives the execution status of each adjustable valve body to form a closed-loop logic of "control-feedback". Attached Figure Description

[0011] Figure 1 This is a system structure block diagram according to an embodiment of the present invention. Detailed Implementation

[0012] like Figure 1 As shown in this embodiment, a valve body control system based on a CAN-to-analog converter is proposed, including a controller, a CAN-to-analog converter, and a valve body assembly. The valve body assembly includes adjustable valve body 1, adjustable valve body 2, and adjustable valve body 3. Each adjustable valve body adjusts its opening state according to analog commands. The controller is communicatively connected to both the CAN-to-analog converter and the valve body assembly. The controller sends control commands to the CAN-to-analog converter via the CAN bus (CAN high / CAN low). The CAN-to-analog converter converts the controller's CAN signal into a 4-20mA standard analog signal (a commonly used industrial signal adapted for valve body control). The CAN-to-analog converter is communicatively connected to adjustable valve body 1, adjustable valve body 2, and adjustable valve body 3, and controls them respectively using the 4-20mA standard analog signal. Adjustable valve body 1, adjustable valve body 2, and adjustable valve body 3 are communicatively connected to the controller, and each adjustable valve body feeds back its current opening state data to the controller. The controller receives feedback signal data from each adjustable valve body.

[0013] In summary, the downlink sequence of control system commands is: controller, CAN bus, CAN-to-analog controller, 4-20mA standard analog signal, and each adjustable valve body; the uplink sequence of feedback signals is: each adjustable valve body, 4-20mA signal, and controller.

[0014] In this embodiment, the CAN-to-analog converter bridges the gap between digital communication protocols and analog signals. It meets the scenario requirements in terms of flexibility and compatibility, converting CAN signal commands from the controller into analog signals to achieve precise control of the adjustable valves. The controller can receive the execution status of each adjustable valve, forming a closed-loop "control-feedback" logic. By utilizing the anti-interference capabilities of the CAN bus and the compatibility of analog signals, the cross-protocol communication requirements between the controller and the valves are resolved, ensuring stable and accurate system operation.

[0015] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A valve body control system based on a CAN-to-analog converter, characterized in that, Includes controller, CAN-to-analog converter and valve body assembly; The controller is connected to both the CAN-to-analog converter and the valve body assembly. The controller sends control commands to the CAN-to-analog converter via the CAN bus. The CAN-to-analog converter converts the controller's CAN signals into analog signals and uses them to control the valve body assembly. The controller receives feedback signal data from the valve body assembly.

2. The valve body control system based on a CAN-to-analog converter according to claim 1, characterized in that, The analog quantity is a standard 4-20mA analog quantity.

3. A valve body control system based on a CAN-to-analog converter according to claim 2, characterized in that, The valve body assembly includes adjustable valve body 1, adjustable valve body 2 and adjustable valve body 3. Each adjustable valve body adjusts its own opening state according to the analog signal command and feeds back the current opening state data to the controller.

4. A valve body control system based on a CAN-to-analog converter according to claim 3, characterized in that, The CAN-to-analog converter is connected to the adjustable valve body 1, adjustable valve body 2 and adjustable valve body 3 for communication and control respectively. The adjustable valve body 1, adjustable valve body 2 and adjustable valve body 3 are connected to the controller for communication respectively.

5. A valve body control system based on a CAN-to-analog converter according to claim 3, characterized in that, The downlink sequence of control system commands is: controller, CAN bus, CAN-to-analog controller, 4-20mA standard analog signal and valve body assembly. The uplink sequence of feedback signals is: valve body assembly, 4-20mA signal and controller.

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