Key phase sensor calibration device

Abstract

The utility model relates to the technical field of sensor calibration, in particular to a key phase sensor calibration device, which comprises a rotating motor, a standard reference sensor, a signal conditioning module, a main control module, a data transmission module and a display module, the standard reference sensor is used for generating a reference signal compared with a sensor to be calibrated, and the signal conditioning module is used for conditioning output signals of the standard reference sensor and the sensor to be calibrated; the main control module receives data from the signal conditioning module, processes the data and displays the data through the display module, the main control module communicates with peripheral equipment through the data transmission module, and the main control module drives the rotating motor to rotate. According to the utility model, the key phase sensor can be calibrated regularly, and long-term stable operation of the key phase sensor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor calibration, in particular to a key phase sensor calibration device. Background Art

[0002] A keyphasor sensor is a sensor used to measure mechanical vibration and rotational speed. Keyphasor sensors can be used to measure the phase and rotational speed of rotating parts to monitor the status of mechanical equipment.

[0003] Currently, there is a lack of relevant calibration devices for key phase sensors, resulting in the inability to guarantee the measurement accuracy and reliability of key phase sensors. The following problems exist:

[0004] 1) Measurement accuracy is difficult to guarantee: Without a suitable calibration device, it is difficult to verify the accuracy of the sensor output signal, which may affect the correct judgment of the status of the mechanical equipment.

[0005] 2) Reliability cannot be guaranteed: Uncalibrated sensors may produce inconsistent or erroneous data, affecting the stability and security of the system.

[0006] 3) Poor standard consistency: There may be differences between key phase sensors produced by different manufacturers, and the lack of a unified calibration standard makes these differences difficult to quantify and manage. Utility Model Content

[0007] The utility model provides a key phase sensor calibration device, which can regularly calibrate the key phase sensor to ensure its long-term stable operation.

[0008] In order to achieve the purpose of the utility model, the technical solution adopted is: a key phase sensor calibration device, including a rotating motor, a standard reference sensor, a signal conditioning module, a main control module, a data transmission module and a display module, the standard reference sensor and the sensor to be calibrated are both installed on the rotating shaft of the rotating motor, the standard reference sensor is used to generate a reference signal for comparison with the sensor to be calibrated, and the signal conditioning module is used to condition the output signals of the standard reference sensor and the sensor to be calibrated; the main control module receives data from the signal conditioning module for processing and displays it through the display module, the main control module communicates with the peripheral device through the data transmission module, and the main control module drives the rotating motor to rotate.

[0009] As an optimized solution of the present invention, the signal conditioning module includes an operational amplifier circuit, which includes an operational amplifier chip U1, a resistor R35 and a resistor R36. The first pin and the second pin of the operational amplifier chip U1 are connected to the fifth pin of the operational amplifier chip U1 through the resistor R35, and the fifth pin of the operational amplifier chip U1 is connected to the reference voltage through the resistor R36.

[0010] As an optimization solution of the present invention, the signal conditioning module also includes a comparison circuit, which includes a comparison chip T1, a resistor R18 and a capacitor C80. The 7th pin of the operational amplifier chip U1 is connected to the 3rd pin of the comparison chip T1 through the resistor R18, and the 4th pin of the comparison chip T1 is connected to the 2nd pin through the capacitor C80.

[0011] As an optimized solution of the present invention, the main control module includes a microcontroller U2, and the microcontroller U2 is STM32F103C8T6.

[0012] As an optimization solution of the present invention, the data transmission module includes a serial port to Ethernet chip U3, a network port transformer chip U4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C3, a capacitor C1, a capacitor C2, a resistor R5, a resistor R6, a diode D1, a diode D2 and a diode D3. The RESET pin of the serial port to Ethernet chip U3 is grounded through a resistor R4 and a capacitor C3 connected in series, the VNAS pin of the serial port to Ethernet chip U3 is connected to the power supply VCC, the LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R1 and a diode D1 connected in series, the TXD_LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R2 and a diode D2 connected in series, the RXD_LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R3 and a diode D3 connected in series, and the serial port to Ethernet chip U3 The TX_N pin of the serial port to Ethernet chip U3 is connected to the 3rd pin of the network port transformer chip U4, the TX_P pin of the serial port to Ethernet chip U3 is connected to the 1st pin of the network port transformer chip U4, the RX_N pin of the serial port to Ethernet chip U3 is connected to the 8th pin of the network port transformer chip U4, the RX_P pin of the serial port to Ethernet chip U3 is connected to the 6th pin of the network port transformer chip U4, the X32MO pin of the serial port to Ethernet chip U3 is grounded through capacitor C1, the X32MI pin of the serial port to Ethernet chip U3 is grounded through capacitor C2, the 15th pin of the network port transformer chip U4 is grounded through resistor R6, the 10th pin of the network port transformer chip U4 is grounded through resistor R5, the TXD pin of the serial port to Ethernet chip U3 is connected to the 29th pin of the microcontroller U2, and the RXD pin of the serial port to Ethernet chip U3 is connected to the 30th pin of the microcontroller U2.

[0013] As an optimized solution of the present utility model, the data transmission module also includes a WIFI module U5, a resistor R23, a diode LED1 and a switch SW1. The 5th pin of the WIFI module U5 is connected to the 11th pin of the WIFI module U5 through the series-connected resistor R23, the diode LED1 and the switch SW1, the 16th pin of the WIFI module U5, the 15th pin of the WIFI module U5 is connected to the 11th pin of the microcontroller U2, and the 16th pin of the WIFI module U5 is connected to the 12th pin of the microcontroller U2.

[0014] The utility model has positive effects: 1) the utility model can accurately evaluate the performance of the sensor to be calibrated by using a precisely calibrated standard reference sensor as a benchmark, ensuring the consistency between the output signal of the sensor to be calibrated and the actual value, thereby improving the measurement accuracy;

[0015] 2) The utility model regularly maintains and calibrates the calibration device, which helps to reduce errors caused by sensor aging or environmental changes, thereby improving the reliability and safety of the key phase sensor;

[0016] 3) The device of this utility model is equipped with multiple data transmission methods (Ethernet, WIFI), and the most suitable data transmission scheme can be flexibly selected according to specific needs. In addition, these communication interfaces also support remote monitoring and data analysis, facilitating intelligent management and maintenance.

[0017] 4) The utility model adopts a TFT LCD display module, which can intuitively display the current working status and calibration results. This design facilitates the operator to instantly grasp the operating status of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a principle block diagram of the utility model;

[0020] Figure 2 This is a circuit schematic diagram of the operational amplifier circuit of the utility model;

[0021] Figure 3 This is a circuit schematic diagram of the comparison circuit of the utility model;

[0022] Figure 4 This is the circuit schematic diagram of the main control module of the utility model;

[0023] Figure 5 This is a circuit diagram of an embodiment of the data transmission module of the utility model;

[0024] Figure 6This is a circuit diagram of another embodiment of the data transmission module of the present utility model;

[0025] Among them: 1. Rotating motor, 2. Standard reference sensor, 3. Signal conditioning module, 4. Main control module, 5. Data transmission module, 6. Display module. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, the utility model discloses a key phase sensor calibration device, including a rotating motor 1, a standard reference sensor 2, a signal conditioning module 3, a main control module 4, a data transmission module 5 and a display module 6. The standard reference sensor 2 and the sensor to be calibrated are both installed on the rotating shaft of the rotating motor 1. The standard reference sensor 2 is used to generate a reference signal for comparison with the sensor to be calibrated 3. The signal conditioning module 2 is used to condition the output signals of the standard reference sensor 2 and the sensor to be calibrated 3; the main control module 3 receives data from the signal conditioning module 3, processes it and displays it through the display module 6, the main control module 3 communicates with the peripheral device through the data transmission module 5, and the main control module 4 drives the rotating motor 1 to rotate.

[0027] A rotating motor 1 acts as a drive, rotating both the standard reference sensor 2 and the sensor to be calibrated 3. This allows both sensors to experience the same motion conditions (such as rotational speed and acceleration) simultaneously, allowing data from the standard reference sensor 2 to be used to evaluate the performance of the sensor to be calibrated. A standard reference sensor is a high-quality sensor that has been precisely calibrated and has known performance parameters. It provides a reliable benchmark for comparison. When subjected to the same conditions as the sensor to be calibrated, the standard reference sensor generates an output signal that serves as a baseline for comparing the data generated by the sensor to be calibrated.

[0028] To check whether the sensor to be calibrated accurately measures the expected value and what its response characteristics are. If there are deviations, these differences can be reduced by adjusting or correcting the operating parameters of the sensor to be calibrated.

[0029] During implementation, ensure they are securely mounted on the same shaft and minimize any additional vibration or other interference introduced by the installation. Run the system and record the output data for both sensors under different conditions (such as different rotational speeds). Analyze and compare the differences between the two sets of data. For standard reference sensor 2, use an ECS-3130 series key phase sensor.

[0030] like Figure 2As shown, the signal conditioning module 3 includes an operational amplifier circuit, which includes an operational amplifier chip U1, a resistor R35 and a resistor R36. The first and second pins of the operational amplifier chip U1 are connected to the fifth pin of the operational amplifier chip U1 through the resistor R35, and the fifth pin of the operational amplifier chip U1 is connected to the reference voltage through the resistor R36. Figure 3 As shown, the signal conditioning module 3 also includes a comparison circuit, which includes a comparison chip T1, a resistor R18 and a capacitor C80. The 7th pin of the operational amplifier chip U1 is connected to the 3rd pin of the comparison chip T1 through the resistor R18, and the 4th pin of the comparison chip T1 is connected to the 2nd pin through the capacitor C80.

[0031] Operational amplifier chip U1 is an OPA2277 precision operational amplifier, featuring high voltage amplification, improved low-noise performance, and a wider output voltage range. The operational amplifier circuit conditions the signals (-20 to 20V) collected by standard reference sensor 2 and sensor 3 to a signal range acceptable to the voltage comparator circuit (0 to 2.5V). The addition and subtraction circuit achieves an output voltage equal to 1 / 8 of the input voltage. A 2.5V reference voltage is superimposed on the positive input, resulting in an output equal to the input voltage plus the reference voltage divided by 2. C11 and C12 are decoupling capacitors, which prevent coupling interference between the conditioning circuit and the power supply, ensuring circuit stability and reliability. They also prevent voltage drops caused by sudden current changes. Comparator chip T1 is an SGM8743 high-speed comparator chip, featuring high-speed response, low power consumption, and a propagation delay of only 6ns. This circuit converts the output signal of the operational amplifier circuit into a digital pulse signal through an external circuit consisting of three resistors and two capacitors.

[0032] like Figure 4 As shown, the main control module 4 includes a microcontroller U2, which is an STM32F103C8T6. The STM32F103C8T6 has a built-in 12-bit analog-to-digital converter (ADC). The STM32 microcontroller is used for data A / D conversion and serial transmission. C9 should be slightly smaller than C10, and PA0 is used as the input port for A / D conversion.

[0033] like Figure 5As shown, the data transmission module includes a serial port to Ethernet chip U3, a network port transformer chip U4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C3, a capacitor C1, a capacitor C2, a resistor R5, a resistor R6, a diode D1, a diode D2 and a diode D3. The RESET pin of the serial port to Ethernet chip U3 is grounded through a resistor R4 and a capacitor C3 connected in series, the VNAS pin of the serial port to Ethernet chip U3 is connected to the power supply VCC, the LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R1 and a diode D1 connected in series, the TXD_LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R2 and a diode D2 connected in series, and the RXD_LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R2 and a diode D2 connected in series. Resistor R3 and diode D3 are connected to the power supply VCC, the TX_N pin of the serial port to Ethernet chip U3 is connected to the 3rd pin of the network port transformer chip U4, the TX_P pin of the serial port to Ethernet chip U3 is connected to the 1st pin of the network port transformer chip U4, the RX_N pin of the serial port to Ethernet chip U3 is connected to the 8th pin of the network port transformer chip U4, the RX_P pin of the serial port to Ethernet chip U3 is connected to the 6th pin of the network port transformer chip U4, the X32MO pin of the serial port to Ethernet chip U3 is grounded through capacitor C1, the X32MI pin of the serial port to Ethernet chip U3 is grounded through capacitor C2, the 15th pin of the network port transformer chip U4 is grounded through resistor R6, and the 10th pin of the network port transformer chip U4 is grounded through resistor R5.

[0034] The serial-to-Ethernet chip U3 is an EBT3001 chip, which connects the collected sensor data to the local area network through the Ethernet port to achieve data transmission. This chip has multiple Modbus gateway modes and MQTT / HTTP IoT gateway modes, which can realize the networking function of serial port devices and connect the data acquisition circuit to the local area network. The RXD and TXD of the chip are respectively connected to the serial port of the main control chip. Through the socket function of the chip, the serial port server is set to UDP Client mode, and then the destination IP and destination port are configured to send data to the remote UDP device. In addition, the HR641680E network port transformer chip is added to the circuit to electrically isolate the TX_N, TX_P, RX_N, and RX_P signals output by the EBT3001 chip, and then the data is transmitted to the RJ45 socket to ensure the reliability of network communication.

[0035] like Figure 6As shown, the data transmission module also includes a WIFI module U5, a resistor R23, a diode LED1 and a switch SW1. The 5th pin of the WIFI module U5 is connected to the 11th pin of the WIFI module U5 and the 16th pin of the WIFI module U5 through the series-connected resistor R23, the diode LED1 and the switch SW1. The 15th pin of the WIFI module U5 is connected to the 11th pin of the microcontroller U2, and the 16th pin of the WIFI module U5 is connected to the 12th pin of the microcontroller U2.

[0036] Display module 6 uses a 1.8-inch TFT LCD display module, which is used to display system status and environmental data in real time. It connects to the main control module via the I2 communication protocol and receives display data from the main control module. The LCD module controls the brightness of the pixels on the screen through its built-in driver circuit, displaying information in graphical or textual form.

[0037] During implementation, secure the rotating motor 1 in a suitable position and ensure stable operation. Install the standard reference sensor 2 (ECS-3130 series) and the sensor to be calibrated 3 on the rotating shaft of the rotating motor 1, ensuring they are coaxial and securely mounted to minimize any additional vibration or interference. Connect the output signal lines of the standard reference sensor 2 and the sensor to be calibrated 3 to the signal conditioning module 3. This signal conditioning module, consisting of an operational amplifier and a comparator circuit, conditions the sensor's analog signals to a range suitable for subsequent processing. Use an STM32F103C8T6 microcontroller (U2), setting the ADC sampling parameters and serial communication protocol. Implement serial-to-Ethernet conversion using the EBT3001 chip, configuring the UDP client mode, destination IP address, and port. A Wi-Fi module (U5) is also connected to the main control module, providing wireless data transmission options. Configure the display module: a 1.8-inch TFT LCD connected to the main control module 4 via the I2C interface, ready to receive and display real-time data.

[0038] 1. Initialization and calibration

[0039] Start the system: supply power to the entire system and start the rotating motor 1.

[0040] Warm-up and self-test: Allow the system to warm up for a while and perform a self-test to ensure that all components are functioning properly.

[0041] Initial calibration: If necessary, perform an initial calibration on the standard reference sensor 2 to ensure that its output signal is accurate.

[0042] 2. Start calibration

[0043] Setting the rotation speed: The main control module 4 controls the rotating motor 1 to set an initial rotation speed.

[0044] Data collection: When the motor reaches the set speed, the signal conditioning module 3 starts to collect the output signals of the standard reference sensor 2 and the sensor to be calibrated 3.

[0045] Signal processing: The signal conditioning module 3 conditions the collected signal and then transmits it to the main control module 4.

[0046] Data conversion and analysis: The main control module 4 converts the analog signal into a digital signal through the built-in ADC, and performs preliminary processing and analysis on the data.

[0047] Display and recording: The processed data is displayed on a 1.8-inch TFT LCD and simultaneously sent to an external device (such as a computer) via the data transmission module 5 for further analysis and storage.

[0048] Multi-point test: Repeat the above steps and perform multiple tests at different speeds to cover the entire operating range of the sensor to be calibrated.

[0049] 3. Data analysis and adjustment

[0050] Comparative analysis: Compare the data of the sensor to be calibrated 3 with the data of the standard reference sensor 2 and calculate the deviation.

[0051] Adjust parameters: If significant deviation is found in the sensor 3 to be calibrated, its operating parameters can be adjusted through software or hardware means to reduce the error.

[0052] Retest: After adjusting the parameters, retest under the same conditions until the accuracy requirements are met.

[0053] 4. Complete calibration

[0054] Save results: record the final calibration results, including performance curves at different speeds, etc.

[0055] Generate report: Organize all data collected during the calibration process and generate a detailed calibration report.

[0056] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A key phase sensor calibration device, characterized in that: The invention comprises a rotating motor (1), a standard reference sensor (2), a signal conditioning module (3), a main control module (4), a data transmission module (5) and a display module (6); the standard reference sensor (2) and the sensor to be calibrated are both mounted on the rotating shaft of the rotating motor (1); the standard reference sensor (2) is used to generate a reference signal for comparison with the sensor to be calibrated; the signal conditioning module (3) is used to condition the output signals of the standard reference sensor (2) and the sensor to be calibrated; the main control module (4) receives data from the signal conditioning module (3), processes the data and displays the data through the display module (6); the main control module (4) communicates with the peripheral device through the data transmission module (5); and the main control module (4) drives the rotating motor (1) to rotate.

2. A key phase sensor calibration device according to claim 1, characterized in that: The signal conditioning module (3) includes an operational amplifier circuit, which includes an operational amplifier chip U1, a resistor R35, and a resistor R36. The first and second pins of the operational amplifier chip U1 are connected to the fifth pin of the operational amplifier chip U1 through the resistor R35, and the fifth pin of the operational amplifier chip U1 is connected to a reference voltage through the resistor R36.

3. A key phase sensor calibration device according to claim 2, characterized in that: The signal conditioning module (3) further includes a comparison circuit, which includes a comparison chip T1, a resistor R18, and a capacitor C80. The seventh pin of the operational amplifier chip U1 is connected to the third pin of the comparison chip T1 via the resistor R18, and the fourth pin of the comparison chip T1 is connected to the second pin via the capacitor C80.

4. A key phase sensor calibration device according to claim 3, characterized in that: The main control module (4) includes a microcontroller U2, and the microcontroller U2 is STM32F103C8T6.

5. A key phase sensor calibration device according to claim 4, characterized in that: The data transmission module includes a serial port to Ethernet chip U3, a network port transformer chip U4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C3, a capacitor C1, a capacitor C2, a resistor R5, a resistor R6, a diode D1, a diode D2 and a diode D3. The RESET pin of the serial port to Ethernet chip U3 is grounded through a resistor R4 and a capacitor C3 in series, the VNAS pin of the serial port to Ethernet chip U3 is connected to the power supply VCC, the LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R1 and a diode D1 in series, the TXD_LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R2 and a diode D2 in series, the RXD_LED pin of the serial port to Ethernet chip U3 is connected to the power supply VCC through a resistor R3 and a diode D3 in series, and the TX_N pin of the serial port to Ethernet chip U3 is connected to the power supply VCC. The pin is connected to the 3rd pin of the network port transformer chip U4, the TX_P pin of the serial port to Ethernet chip U3 is connected to the 1st pin of the network port transformer chip U4, the RX_N pin of the serial port to Ethernet chip U3 is connected to the 8th pin of the network port transformer chip U4, the RX_P pin of the serial port to Ethernet chip U3 is connected to the 6th pin of the network port transformer chip U4, the X32MO pin of the serial port to Ethernet chip U3 is grounded through capacitor C1, the X32MI pin of the serial port to Ethernet chip U3 is grounded through capacitor C2, the 15th pin of the network port transformer chip U4 is grounded through resistor R6, the 10th pin of the network port transformer chip U4 is grounded through resistor R5, the TXD pin of the serial port to Ethernet chip U3 is connected to the 29th pin of the microcontroller U2, and the RXD pin of the serial port to Ethernet chip U3 is connected to the 30th pin of the microcontroller U2.

6. The key phase sensor calibration device according to claim 1, characterized in that: The data transmission module also includes a WIFI module U5, a resistor R23, a diode LED1 and a switch SW1. The 5th pin of the WIFI module U5 is connected to the 11th pin of the WIFI module U5 through the series resistor R23, the diode LED1 and the switch SW1. The 16th pin of the WIFI module U5 and the 15th pin of the WIFI module U5 are connected to the 11th pin of the microcontroller U2, and the 16th pin of the WIFI module U5 is connected to the 12th pin of the microcontroller U2.

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