Micro motor output pressure detection module

Abstract

The utility model aims to provide the micro motor output pressure detection module which is high in detection precision, strong in anti-interference capability and good in adaptability. The device comprises a pressure sensor, a processing module, a power supply module and an acquisition module, the processing module is connected with the pressure sensor through the acquisition module, the processing module is also communicated with an external upper computer, the acquisition module comprises an amplifier, an analog-to-digital converter and a level translator which are connected in sequence, and the level translator is connected with the processing module. The amplifier is connected with the output end of the pressure sensor, the analog-to-digital converter is in communication connection with the processing module, the power supply module comprises a first-stage conversion unit and a second-stage conversion unit, the first-stage conversion unit is connected with an external power supply, and the second-stage conversion unit is connected with an external power supply. The input end of the secondary conversion unit is connected with the output end of the first conversion unit, and the output end of the secondary conversion unit is connected with the amplifier. The utility model is applied to the technical field of detection modules.

Description

Technical Field

[0001] The utility model is applied to the technical field of detection modules, and particularly relates to a micro motor output pressure detection module. Background Art

[0002] Micromotor output pressure detection is a crucial component of industrial automation, primarily used to monitor pressure changes during micromotor operation in real time to ensure the proper functioning of the equipment and safe production. With the rapid development and widespread adoption of microcomputer technology, pressure detection technology has also made significant progress. Since the introduction of microcomputers in the 1970s, my country's pressure monitoring technology has gradually shifted towards the design of data acquisition and processing systems centered around small computers. The widespread adoption of microcomputers in the 1980s further accelerated the development of automatic detection technology, making pressure detection more intelligent and automated. Existing technologies offer a variety of implementation options for micromotor output pressure detection devices, the most similar of which include: single-chip microcomputer pressure detectors, small motor detection devices, and pressure detection devices.

[0003] There are some significant shortcomings in the existing technology of micro-motor output pressure detection devices, which are mainly reflected in the following aspects:

[0004] Limited detection accuracy: Existing detection devices may have difficulty accurately measuring tiny pressure changes at the output of the micromotor due to design or technical limitations. This can lead to inaccurate test results and affect subsequent analysis and judgment.

[0005] Poor anti-interference ability: Electromagnetic interference, vibration and other factors that may be generated when the motor is running may have a negative impact on the measurement accuracy of the detection device, resulting in unstable measurement results.

[0006] Poor adaptability: Different models of micro motors may require different detection devices or adjustment of detection parameters, and existing equipment may not be able to adapt to such changes quickly.

[0007] If a micro motor output pressure detection module with high detection accuracy, strong anti-interference ability and good adaptability can be provided, the above technical problems can be well solved. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a micro motor output pressure detection module with high detection accuracy, strong anti-interference ability and good adaptability.

[0009] The technical solution adopted by the present utility model is: the present utility model includes a pressure sensor, a processing module, a power supply module and an acquisition module, the processing module is connected to the pressure sensor through the acquisition module, the processing module also communicates with an external host computer, the acquisition module includes an amplifier, an analog-to-digital converter and a level converter connected in sequence, the amplifier is connected to the output end of the pressure sensor, the analog-to-digital converter is communicatively connected to the processing module, the power supply module includes a primary conversion unit and a secondary conversion unit, the primary conversion unit is connected to an external power supply, the input end of the secondary conversion unit is connected to the output end of the first conversion unit, and the output end of the secondary conversion unit is connected to the amplifier.

[0010] As can be seen from the above scheme, the pressure sensor cooperates with the output end of the micromotor to be tested, so that the micromotor outputs pressure to the pressure sensor during testing, and then collects the pressure value output by the micromotor. The amplifier cooperates with the secondary conversion unit to convert the double-ended signal of the pressure sensor into a single-ended signal and amplify it 100 times. The analog-to-digital converter converts the analog signal into a digital signal, and the level converter sends it to the processing module. The use of a two-stage conversion unit provides a signal amplification capability with strong anti-interference ability and high precision, thereby ensuring that the signal collected by the analog-to-digital converter has high precision. Sensitivity adjustment in conjunction with the processing module can achieve detection adapted to different products.

[0011] A preferred solution is that the first-level conversion unit includes a first power supply chip and a second power supply chip connected in sequence, the first power supply chip is connected to an external power supply, the first power supply chip includes a power supply chip with model MP3416GJ-Z, and the second power supply chip includes a power supply chip with model LT3045EMSE#PBF, and the first power supply chip and the second power supply chip convert the voltage into 5.5V and 5V output in sequence.

[0012] A preferred solution is that the secondary conversion unit includes a third power supply chip and a comparator, the input end of the third power supply chip is connected to the output end of the primary conversion unit, the output end of the third power supply chip is connected to the positive input end of the comparator, and the output end of the comparator is connected to the amplifier.

[0013] A preferred solution is that the two sets of input terminals of the amplifier are connected to the output terminal of the pressure sensor, the output terminal of the amplifier is connected to the positive input terminal of the analog-to-digital converter, the output terminal of the analog-to-digital converter is connected to the level converter via the I2C bus, and the level converter communicates with the external host computer via the I2C bus.

[0014] A preferred solution is that the processing module is connected to a memory. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a system block diagram of the utility model;

[0016] Figure 2 is a circuit schematic diagram of the primary conversion unit;

[0017] Figure 3 is a circuit schematic diagram of the secondary conversion unit;

[0018] Figure 4 1 is a circuit schematic diagram of the acquisition module. DETAILED DESCRIPTION

[0019] like Figures 1 to 4 As shown, in this embodiment, the utility model includes a pressure sensor 1, a processing module 2, a power supply module 3 and an acquisition module 4. The processing module 2 is connected to the pressure sensor 1 through the acquisition module 4. The processing module 2 also communicates with an external host computer. The acquisition module 4 includes an amplifier U802, an analog-to-digital converter U803 and a level converter U801 connected in sequence. The amplifier U802 is connected to the output end of the pressure sensor 1, and the analog-to-digital converter U803 is communicatively connected to the processing module 2. The power supply module 3 includes a primary conversion unit and a secondary conversion unit. The primary conversion unit is connected to an external power supply, the input end of the secondary conversion unit is connected to the output end of the first conversion unit, and the output end of the secondary conversion unit is connected to the amplifier U802. The two input terminals of the amplifier U802 are connected to the output terminal of the pressure sensor 1. The output terminal of the amplifier U802 is connected to the positive input terminal of the analog-to-digital converter U803. The output terminal of the analog-to-digital converter U803 is connected to the level converter U801 via the I2C bus. The level converter U801 communicates with an external host computer via the I2C bus. The pressure sensor 1 cooperates with the output terminal of the micro-motor to be measured, thereby collecting the pressure generated by the micro-motor output terminal and converting it into an analog signal output. The amplifier U802 converts the double-ended signal into a single-ended signal and outputs it to the analog-to-digital converter U803. The analog-to-digital converter U803 converts the analog signal into a digital signal and outputs it to the level converter U801. The analog-to-digital converter U803 sends the data to the processing module 2 via the level converter U801, and the processing module 2 then feeds the data back to the external computer. The power supply module 3 performs a secondary conversion on the input voltage to provide stable power with low ripple, ensuring the product's anti-interference ability.

[0020] like Figure 4As shown, the amplifier U802 is an operational amplifier chip of model INA186A3IDCKT, which amplifies the signal output by the pressure sensor 1 by 100 times. The analog-to-digital converter U803 is an ADC chip of model MCP3421, which has a compact overall structure and occupies a small space. It also has a single-channel low-noise, high-precision delta-sigma A / D converter with differential input and up to 18-bit resolution. For situations with higher precision requirements, the model MCP3425 can be used as an alternative. It communicates with the level converter U801 via a two-wire I2C interface. Data is forwarded to the host computer through the processing module 2 to obtain test data. The processing module 2 is a commonly used microprocessor such as the STM32 series.

[0021] like Figure 2 As shown, in this embodiment, the primary conversion unit includes a first power chip U601 and a second power chip U602 connected in sequence. The first power chip U601 is connected to an external power supply. The first power chip U601 includes a power chip model MP3416GJ-Z, and the second power chip U602 includes a power chip model LT3045EMSE#PBF. The first power chip U601 and the second power chip U602 convert the voltage to 5.5V and 5V outputs respectively. The first power chip U601 filters and boosts the 1.8V voltage, and then converts it through the second power chip U602 to obtain a 5V voltage with less ripple for the operation of each module.

[0022] like Figure 3 As shown, in this embodiment, the secondary conversion unit includes a third power chip U603 and a comparator U604. The input of the third power chip U603 is connected to the output of the primary conversion unit, the output of the third power chip U603 is connected to the positive input of the comparator U604, and the output of the comparator U604 is connected to the amplifier U802. The third power chip U603 converts the output voltage of the second power chip U602 to 2.5V, and cooperates with the voltage divider resistor and the comparator U604 to output a 50mV reference voltage to the amplifier U802, thereby providing a stable power supply and improving detection accuracy.

[0023] like Figure 4 As shown, in this embodiment, the processing module is connected to a memory U804. The memory U804 stores sensitivity data, and then the stored sensitivity data is modified to perform measurements adapted to different products.

[0024] Although the embodiments of the present invention are described with practical solutions, they do not limit the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A micro-motor output pressure detection module, comprising a pressure sensor (1), a processing module (2), a power module (3) and an acquisition module (4), wherein the processing module (2) is connected to the pressure sensor (1) via the acquisition module (4), and the processing module (2) also communicates with an external host computer, characterized in that: The acquisition module (4) includes an amplifier (U802), an analog-to-digital converter (U803), and a level converter (U801) connected in sequence, the amplifier (U802) is connected to the output end of the pressure sensor (1), the analog-to-digital converter (U803) is communicatively connected to the processing module (2), and the power supply module (3) includes a primary conversion unit and a secondary conversion unit, the primary conversion unit is connected to an external power supply, the input end of the secondary conversion unit is connected to the output end of the primary conversion unit, and the output end of the secondary conversion unit is connected to the amplifier (U802).

2. A micro motor output pressure detection module according to claim 1, characterized in that: The primary conversion unit includes a first power chip (U601) and a second power chip (U602) connected in sequence, the first power chip (U601) is connected to an external power supply, the first power chip (U601) includes a power chip with a model number of MP3416GJ-Z, and the second power chip (U602) includes a power chip with a model number of LT3045EMSE#PBF. The first power chip (U601) and the second power chip (U602) convert the voltage into 5.5V and 5V outputs in sequence.

3. The micro-motor output pressure detection module according to claim 1, characterized in that: The secondary conversion unit comprises a third power supply chip (U603) and a comparator (U604); the input end of the third power supply chip (U603) is connected to the output end of the primary conversion unit; the output end of the third power supply chip (U603) is connected to the positive input end of the comparator (U604); and the output end of the comparator (U604) is connected to the amplifier (U802).

4. The micro-motor output pressure detection module according to claim 1, characterized in that: Two sets of input terminals of the amplifier (U802) are connected to the output terminal of the pressure sensor (1), the output terminal of the amplifier (U802) is connected to the positive input terminal of the analog-to-digital converter (U803), the output terminal of the analog-to-digital converter (U803) is connected to the level converter (U801) via an I2C bus, and the level converter (U801) communicates with an external host computer via the I2C bus.

5. The micro-motor output pressure detection module according to claim 1, characterized in that: The processing module is connected to a memory (U804).

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