Rotational speed calibration device for planetary cement mortar mixer based on wireless transmission technology

Abstract

The utility model discloses a kind of planet type cement mortar mixer rotating speed calibration devices based on wireless transmission technology, including rotating speed measurement module being set on the revolution eccentric seat of mixer by mounting support, reflective sticker and data receiving and display module being set on the mixer, wireless signal transmission is carried out between rotating speed measurement module and data receiving and display module;The rotating speed measurement module includes the revolution speed measurement module of horizontal direction and the rotation speed measurement module of vertical direction, the reflective sticker corresponding with revolution speed measurement module is pasted on the host frame of mixer, the reflective sticker corresponding with rotation speed measurement module is provided on the blade of mixer, rotation speed measurement module is set below rotation speed measurement module.The utility model uses photoelectric wireless rotating speed measurement module to carry out non-contact measurement, with Compact structure, operating stable characteristics, also has high precision, high resolution, high reliability and response speed fast and the like advantages.

Description

Technical Field

[0001] This utility model relates to the technical field of cement mortar mixers, and more specifically to a planetary cement mortar mixer speed calibration device based on wireless transmission technology. Background Technology

[0002] Planetary cement mortar mixers are used to mix cement, standard sand, and water in a specific ratio to form a uniform mortar. They are commonly used in the construction, transportation, railway, and cement industries, and are an essential and indispensable piece of equipment in cement plants, construction companies, related professional colleges, and research institutions' cement laboratories. The mixer consists of a mixing bowl, mixing blades, a transmission mechanism, and a control system.

[0003] During the use of a planetary cement mortar mixer, it is necessary to measure the rotational speed of the mixing blades, both on their own axis and around the sun. Traditional measurement methods include... Figure 1 As shown, when measuring rotational speed, the revolution speed measuring module 4 is fixed outside the mixer, and its corresponding reflective sticker 6 is fixed on the revolution eccentric seat 2. The laser of the speed measuring module is aligned with the reflective sticker to achieve the measurement of revolution speed. The rotation speed measuring module is fixed on the main shaft of the blade 3, and the reflective sticker 6 is also fixed on the revolution eccentric seat 2. The speed measuring module is adjusted so that the laser beam speed is aligned with the reflective sticker to achieve the measurement of rotation. The rotation speed is calculated based on the measured revolution speed combined with the ratio of the number of teeth of revolution and rotation. This indirect measurement method cannot accurately measure instantaneous speed. Therefore, a measuring device that directly measures the rotation and revolution speed of the planetary cement mortar mixer is needed. Moreover, due to the increased measurement accuracy requirements in national standards and specifications, the original measurement methods and principles cannot meet the current technical requirements. Therefore, a measuring device or apparatus that can achieve higher precision is needed to accurately measure rotational speed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a speed calibration device for a planetary cement mortar mixer based on wireless transmission technology, so as to solve the problems in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A planetary cement mortar mixer speed calibration device based on wireless transmission technology includes a speed measurement module mounted on the eccentric seat of the mixer via a mounting bracket for collecting mixer speed information, a reflective sticker mounted on the mixer for reflecting the information emitted by the speed measurement module, and a data receiving and display module for receiving data emitted by the speed measurement module, processing and displaying the obtained speed data. The speed measurement module and the data receiving and display module transmit wireless signals to each other. The speed measurement module includes a horizontally oriented revolution speed measuring module for measuring the revolution speed of the mixer and a vertically oriented rotation speed measuring module for measuring the rotation information of the mixer. Reflective stickers corresponding to the revolution speed measuring module are affixed to the main frame of the mixer, and reflective stickers corresponding to the rotation speed measuring module are set on the blades of the mixer. The rotation speed measuring module is located below the revolution speed measuring module.

[0007] To further optimize the technical solution, the speed measurement module includes a speed measuring housing, inside which is a control board. The control board includes a power management module for providing stable power, a USB charging module for charging, a photoelectric switch sensor for speed measurement, a DC-DC module for providing power to the photoelectric switch sensor, an MCU control module for controlling speed measurement, and a wireless radio frequency module for transmitting acquired signals. The output of the USB charging module is connected to the input of the power management module. The output of the power management module is connected to the power inputs of the DC-DC module and the MCU control module. The output of the DC-DC module is connected to the input of the photoelectric sensor. The output of the photoelectric switch sensor is connected to the input of the MCU control module. The output of the MCU control module is connected to the input of the data receiving and display module via the wireless radio frequency module.

[0008] To further optimize the technical solution, the speed measuring housing is provided with a speed information acquisition hole corresponding to the photoelectric switch sensor and a mounting hole for installation.

[0009] To further optimize the technical solution, the data receiving and display module includes a housing. The front end of the housing is equipped with a display screen for displaying speed measurement information and buttons for setting detection information. The housing contains a control mechanism, which includes a receiver power management module mounted on a circuit board for power supply, an RS232 interface circuit for communication with external devices, a filter circuit for processing the received speed measurement signal, and a wireless radio frequency module for receiving signals from the speed measurement module. The output of the receiver power management module is connected to the input of the filter circuit. The filter circuit receives the measurement signal from the speed measurement module through the wireless radio frequency module. The output of the filter circuit is connected to the display screen and the input of the RS232 interface circuit, respectively.

[0010] To further optimize the technical solution, a support frame for supporting the shell is hinged to the front end of the shell.

[0011] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0012] This utility model provides a planetary cement mortar mixer speed calibration device based on wireless transmission technology. The speed measurement module is directly fixed on the revolution eccentric seat to measure the revolution and rotation speed. It adopts photoelectric wireless speed measurement module for non-contact measurement, which has the characteristics of compact structure and stable operation. It also has the advantages of high precision, high resolution, high reliability and fast response speed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a traditional speed measurement method for mixers;

[0014] Figure 2 This is a schematic diagram of the mixer speed measurement method of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the speed measuring shell of this utility model;

[0016] Figure 4 This is a schematic diagram of the data receiving and display module of this utility model;

[0017] Figure 5 This is a circuit diagram of the power management module of this utility model;

[0018] Figure 6 This is a circuit diagram of the USB charging module of this utility model;

[0019] Figure 7 This is a circuit diagram of the DC-DC module of this utility model;

[0020] Figure 8 This is a circuit diagram of the MCU control module of this utility model;

[0021] Figure 9 This is a circuit diagram of the power management module for the receiver of this utility model.

[0022] Figure 10 This is a circuit diagram of the RS232 interface circuit of this utility model.

[0023] The components are: 1. Main frame, 2. Revolution eccentric seat, 3. Blade, 4. Revolution speed measurement module, 5. Rotation speed measurement module, 6. Reflective sticker, 7. Speed ​​measurement shell, 8. Speed ​​information acquisition hole, 9. Mounting hole, 10. Shell, 11. Display screen, 12. Button, 13. Support frame. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] The planetary cement mortar mixer speed calibration device based on wireless transmission technology includes a speed measurement module and a data receiving and display module. The speed measurement module is used to collect mixer speed information, and the data receiving and display module is used to receive data information sent by the speed measurement module, process and display the acquired speed data, and transmit wireless signals between the speed measurement module and the data receiving and display module.

[0026] The rotation speed measurement module is installed on the mixer, and its installation structure is as follows: Figure 2 As shown, the rotation speed measurement module includes a revolution speed measurement module 4 and a rotation speed measurement module 5. The revolution speed measurement module 4 is horizontally positioned below the revolution eccentric seat 2 of the mixer, and the rotation speed measurement module 5 is vertically positioned below the revolution speed measurement module 4. The main frame 1 of the mixer is affixed with reflective stickers 6 corresponding to the revolution speed measurement module, and the blades 3 of the mixer are affixed with reflective stickers 6 corresponding to the rotation speed measurement module.

[0027] Both the revolution speed measuring module and the rotation speed measuring module are fixed on the revolution eccentric seat of the mixer. In use, the laser emitted by the revolution speed measuring module fixed on the revolution eccentric seat is horizontal and is aligned with the reflective sticker on the main frame. The laser emitted by the rotation speed measuring module fixed below the revolution speed measuring module is vertical and is aligned with the reflective sticker on the blade. The rotation speed is obtained by subtracting the revolution speed from the measured rotation speed.

[0028] The revolution speed measurement module 4 and the rotation speed measurement module 5 have the same structure, including a speed measurement housing 7. A control board is installed inside the speed measurement housing 7. The control board is equipped with a power management module, a USB charging module, a photoelectric switch sensor, a DC-DC module, an MCU control module, and a wireless radio frequency module. The output of the USB charging module is connected to the input of the power management module. The output of the power management module is connected to the power input of the DC-DC module and the MCU control module. The output of the DC-DC module is connected to the input of the photoelectric sensor. The output of the photoelectric switch sensor is connected to the input of the MCU control module. The output of the MCU control module is connected to the input of the data receiving and display module through the wireless radio frequency module.

[0029] The structure of the speed measuring housing 7 is as follows Figure 3 As shown, the speed measuring housing has a speed information acquisition hole 8 and a mounting hole 9. The speed information acquisition hole corresponds to the photoelectric switch sensor, and the mounting hole is used to install the speed measuring device.

[0030] The power management module uses a 3.7V, 400mAh lithium battery, which can power the speed measurement module for approximately one hour. The circuit diagram of the power management module is shown below. Figure 5 As shown, since the battery voltage is 3.7V, an HT7533-1 linear regulator (LDO) is used to ensure that the output is stable at 3.3V.

[0031] The USB charging module uses a 5V USB power supply to charge the battery. The circuit diagram of the USB charging module is shown below. Figure 6 As shown, the LTH7 linear charging chip is a complete single-cell lithium-ion battery linear charging device using constant current / constant voltage.

[0032] Photoelectric switch sensors are used to measure speed. Their working principle involves a light source emitting a pulsed beam of light that shines onto a rotating object and is then reflected back to the sensor. A photoresistor in the receiver generates a voltage signal based on changes in light intensity, thereby calculating the rotational speed.

[0033] The DC-DC module is a power supply circuit designed for photoelectric switch sensors. Since the voltage and output of the photoelectric switch are both 12V or 24V, the DC-DC module circuit diagram is as follows: Figure 7 As shown, the AP3012KTR-G1 boost converter chip was used to achieve 24V power supply.

[0034] The MCU control module is used to control the speed measurement. The circuit diagram of the MCU control module is as follows: Figure 8 As shown, it employs a 32-bit microprocessor based on the ARM-M0 core, powered by 2.5–5.5V, with a 50MHz main frequency and built-in Data Flash. The peripheral circuitry mainly includes a crystal oscillator, LED control, I / O control, and communication with the wireless RF module.

[0035] The wireless RF module selected is the M-BK2461U 2.4G wireless serial module, a low-power, high-bandwidth wireless digital communication module operating in the globally universal ISM band of 2.400-2.483GHz. It utilizes the BK2461 chip serial port design, U-UART interface, and multi-channel development-free operation. This module features low cost, small size, stable operation, and good product consistency. With a maximum spatial rate of 2Mbps, it can be widely used in everyday situations requiring wireless connectivity, as well as in industries such as industrial control, access control, time attendance, monitoring, and security. The M-BK2461U uses 2.4G serial port technology, characterized by development-free operation, a line-of-sight range of 120 meters, integrated transceiver without switching, transparent serial transmission, and excellent communication protocol specifications that meet FCC requirements.

[0036] The structure of the data receiving and display module is as follows: Figure 4As shown, the device includes a housing 10. The front end of the housing 10 is equipped with a display screen 11 and buttons 12. The display screen is used to display speed measurement information, and the buttons are used to set detection information. The housing 10 is equipped with a control mechanism, which includes a receiver power management module, an RS232 interface circuit, a filter circuit, and a wireless radio frequency module. The output of the receiver power management module is connected to the input of the filter circuit. The filter circuit receives the measurement signal emitted by the speed measurement module through the wireless radio frequency module. The output of the filter circuit is connected to the display screen and the input of the RS232 interface circuit, respectively.

[0037] The wireless radio frequency module is used to receive signals from the speed measurement module and send the received signals to the filtering circuit for processing.

[0038] The receiver power management module is used to provide power. The circuit diagram of the receiver power management module is shown below. Figure 9 As shown, an 8.4V lithium battery charging management chip and a 7.4V lithium battery are used. A linear regulator (LDO) is used to provide 5V power to the LCD screen, and the same HT7533-1 linear regulator (LDO) is used in the speed measurement module to ensure that the output is stable at 3.3V.

[0039] The RS232 interface circuit is used to communicate with external devices. The circuit diagram of the RS232 interface circuit is shown below. Figure 10 As shown, the SP3232E chip is used to realize the mutual conversion between serial port signals and RS232 signals.

[0040] To meet the requirement of higher accuracy in speed measurement, the filtering circuit filters the signal from the photoelectric switch, eliminating the influence of interference signals and making the measurement data more stable and accurate.

[0041] When measuring rotational speed, the photoelectric switch will generate multiple transitions within a short period of approximately (50-100) ms. These transitions typically refer to the falling edge of the signal. If these short transitions are used as the trigger signal for calculating the rotational speed, the obtained speed value will be abnormally high. Therefore, only the first transition is used as the trigger signal, and a delay function is used to block the MCU for a certain period of time. During the blocking period, the MCU will not receive or judge the signal emitted by the photoelectric switch. After the blocking time has elapsed, the MCU will then judge whether the signal has transitioned.

[0042] To address the issue of false or excessive triggering of the photoelectric switch within a specific speed cycle, the frequency of the trigger signal is collected over 5 to 10 seconds. This frequency is then compared to determine if the trigger signal is abnormal. Typically, the trigger signal frequency is more concentrated when the speed is relatively stable. Furthermore, the trigger signal frequency shows a gradual change over varying speeds, rather than significant or abrupt changes. This process eliminates abnormal jumps or triggers, ensuring stable and reliable speed measurement results.

[0043] The front end of the housing 10 is hinged with a support frame 13, which supports the data receiving and display module during use and is used for hand-carrying the data receiving and display module during transportation.

[0044] This invention measures the rotational speed of a planetary cement mortar mixer, including measurements at low and high speeds. The measurements are performed under normal operating conditions. The mixer's manual control program is started, and after the speed reading stabilizes, the revolution and rotation of the mixing blades are measured simultaneously. The above operation is repeated, measuring the revolution and rotation (high and low speeds) three times each, and the average value is taken. The nominal value is subtracted from the average value to obtain the low / high speed indication error of the mixing blade's rotation and the low / high speed indication error of its revolution.

Claims

1. A device for calibrating the rotational speed of a planetary cement mortar mixer based on wireless transmission technology, characterized in that: The system includes a speed measurement module mounted on the eccentric seat (2) of the mixer via a mounting bracket for collecting mixer speed information, a reflective sticker (6) mounted on the mixer for reflecting the information emitted by the speed measurement module, and a data receiving and display module for receiving data emitted by the speed measurement module, processing and displaying the obtained speed data. The speed measurement module and the data receiving and display module transmit wireless signals to each other. The speed measurement module includes a revolution speed measuring module (4) in the horizontal direction for measuring the revolution speed of the mixer and a rotation speed measuring module (5) in the vertical direction for measuring the rotation information of the mixer. The main frame (1) of the mixer is covered with a reflective sticker (6) corresponding to the revolution speed measuring module, and the blades (3) of the mixer are covered with a reflective sticker (6) corresponding to the rotation speed measuring module. The rotation speed measuring module (5) is located below the revolution speed measuring module (4).

2. The wireless transmission technology based calibration device for rotational speed of planetary cement mortar mixer as claimed in claim 1 wherein: The speed measurement module includes a speed measuring housing (7), inside which is a control board. The control board is equipped with a power management module for providing stable power, a USB charging module for charging, a photoelectric switch sensor for speed measurement, a DC-DC module for providing power to the photoelectric switch sensor, an MCU control module for controlling speed measurement, and a wireless radio frequency module for transmitting acquired signals. The output of the USB charging module is connected to the input of the power management module. The output of the power management module is connected to the power inputs of the DC-DC module and the MCU control module. The output of the DC-DC module is connected to the input of the photoelectric sensor. The output of the photoelectric switch sensor is connected to the input of the MCU control module. The output of the MCU control module is connected to the input of the data receiving and display module via the wireless radio frequency module.

3. The wireless transmission technology based rotational speed calibration device for planetary cement mortar mixers according to claim 2, characterized in that The speed measuring housing (7) is provided with a speed measuring information acquisition hole (8) for a corresponding photoelectric switch sensor and an installation hole (9) for installation.

4. The wireless transmission technology based rotational speed calibration device for planetary cement mortar mixers according to claim 1, characterized in that The data receiving and display module includes a housing (10). The front end of the housing (10) is provided with a display screen (11) for displaying speed measurement information and a button (12) for setting detection information. The housing (10) is provided with a control mechanism. The control mechanism includes a receiver power management module for power supply, an RS232 interface circuit for communication with external devices, a filter circuit for processing the received speed measurement signal, and a wireless radio frequency module for receiving the signal emitted by the speed measurement module. The output end of the receiver power management module is connected to the input end of the filter circuit. The filter circuit receives the measurement signal emitted by the speed measurement module through the wireless radio frequency module. The output end of the filter circuit is connected to the display screen and the input end of the RS232 interface circuit, respectively.

5. The wireless transmission technology based rotational speed calibration device for planetary cement mortar mixers according to claim 4, characterized in that The front end of the housing (10) is hinged to a support frame (13) for supporting the housing (10).

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