CN111103435A - Method and device for measuring rotation speed of cement paste mixer - Google Patents

Method and device for measuring rotation speed of cement paste mixer Download PDF

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Publication number
CN111103435A
CN111103435A CN201911307420.3A CN201911307420A CN111103435A CN 111103435 A CN111103435 A CN 111103435A CN 201911307420 A CN201911307420 A CN 201911307420A CN 111103435 A CN111103435 A CN 111103435A
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pin
capacitor
inductor
revolution
cement paste
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马兴
蔡开城
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Fujian Metrology Institute
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Fujian Metrology Institute
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The invention provides a measuring method and a measuring device for the rotation speed of a cement paste mixer, which comprises a revolution speed measuring process of a revolution shaft, a relative rotation speed measuring process of the rotation shaft and a calculation process of the rotation speed of the cement paste mixer; the calculation process of the autorotation rotating speed of the cement paste mixer comprises the following steps: and subtracting the revolution speed of the revolution shaft from the measured rotation speed of the revolution shaft to obtain the rotation speed of the cement paste mixer. The invention uses the principle of relative motion to subtract the revolution speed of the revolution shaft from the rotation speed of the rotation shaft to obtain the rotation speed of the cement paste mixer. The reduction ratio of the gear mechanism is determined without disassembling the cement paste mixer, so that the potential safety hazard caused by disassembling equipment is eliminated, and the working efficiency is improved.

Description

Method and device for measuring rotation speed of cement paste mixer
Technical Field
The invention relates to the technical field of mixer rotation speed measurement, in particular to a method and a device for measuring the rotation speed of a cement paste mixer.
Background
The cement paste mixer is standard equipment for cement physical property test, and mixes cement and water according to a certain proportion, and then mixes them into uniform test paste for measuring standard consistency and setting time of cement and making stability test block.
Cement paste mixer 100 mainly comprises double speed motor, transmission case, main shaft, eccentric seat, stirring leaf 101, agitated kettle, base, stand, support, dustcoat, program controller etc. and theory of operation: the double-speed motor transmits power to a worm in a transmission case through a coupler, and then transmits the power to the main shaft through a worm wheel and a pair of gears to reduce the speed. The main shaft drives the eccentric seat to synchronously rotate, so that the stirring blades fixed on the eccentric seat revolve. Meanwhile, the stirring blades complete autorotation motion around a fixed internal gear through a planetary gear at the upper end of the stirring blade shaft. The double-speed motor is controlled by a time controller to automatically complete a specified working procedure of one-time slow-stop-one-time fast rotation. The stirring pot and the sliding plate are rotationally locked by the sheet core groove.
The rotating speed is the main technical parameter of the cement paste mixer, the rotating speed comprises revolution rotating speed and rotation rotating speed, and the accuracy of the rotating speed directly influences the physical performance of engineering materials, so that the engineering quality and the building safety are influenced. The rotational speed of the cement paste mixer needs to be calibrated in order to ensure the accuracy of the rotational speed of the cement paste mixer. According to research and literature inquiry, the revolution speed of the cement paste mixer can be measured by a speed measuring device such as a tachometer, and the application of the speed measuring device to directly measure the rotation speed of the cement paste mixer is blank at home, the rotation speed of the cement paste mixer is the relative rotation speed of a mixing blade minus the revolution speed, wherein the rotation and revolution directions are opposite, the revolution is anticlockwise and the rotation is clockwise, and the existing measuring method can only adopt an indirect method: the rotation speed of the cement paste mixer is obtained by converting the revolution speed and the reduction ratio of the gear mechanism, the revolution speed can be directly measured, and the reduction ratio of the gear mechanism needs to be obtained by disassembling the detected equipment, so that the indirect measurement method is not beneficial to personnel safety, equipment safety and low efficiency.
The ① indirect detection method for the rotation speed of the cement paste mixer has the following three problems that the mixer needs to be disassembled and assembled, the cement paste mixer is generally powered by three-phase electricity and has the risk of electric shock, the operation mode is inconvenient, the use and maintenance of equipment are not facilitated, and the safety of personnel is not facilitated, ② due to the fact that a gap exists between a gear wheel and a gear ring of a planetary gear, the rotation speed of a stirring blade calculated by the revolution speed of the stirring blade and the reduction ratio of a gear mechanism has a certain error from the actual rotation speed, the gear is abraded along with the lengthening of the use time, the error is likely to be larger, and under the condition, the change of the error cannot be found by the indirect detection method, the indirect detection method for the rotation speed of the ③ mixer has low working efficiency, the detection workload of the cement paste mixer is large every year, and a large amount.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a device for measuring the autorotation speed of a cement paste mixer, wherein the measured rotating speed value of a rotating shaft is subtracted from the measured rotating speed value of the rotating shaft to obtain the autorotation speed of the cement paste mixer by utilizing the principle of relative motion, the mixer is not required to be disassembled and assembled, the revolution speed and the reduction ratio of a gear mechanism are not required to be converted, the working efficiency and the measurement precision are improved, and the potential safety hazard is eliminated.
The invention is realized by the following steps: a method for measuring the rotation speed of a cement paste mixer comprises a revolution speed measuring process of a revolution shaft, a relative rotation speed measuring process of the rotation shaft and a calculation process of the rotation speed of the cement paste mixer;
the calculation process of the autorotation rotating speed of the cement paste mixer comprises the following steps: and subtracting the revolution speed of the revolution shaft from the measured rotation speed of the revolution shaft to obtain the rotation speed of the cement paste mixer.
Further, the revolution rotating speed measuring process of the revolution shaft comprises the following steps:
step S11, fixing the detected piece on the revolution shaft;
step S12, fixing the rotating speed measuring device on the stirring frame, and adjusting the position and the angle of the rotating speed measuring device to make the detection part of the rotating speed measuring device align with the detected piece on the revolution axis;
and step S13, starting the cement paste mixer and the rotating speed measuring device to start working, wherein when the cement paste mixer starts working, the rotating speed measuring device starts to directly measure the revolution rotating speed of the revolution shaft, and after the rotating speed is stable, the numerical value of the revolution rotating speed is read and recorded.
Further, the relative rotation speed measuring process of the rotation shaft comprises the following steps:
step S21, fixing the detected piece on the rotation shaft;
step S22, fixing the rotating speed measuring device on the eccentric seat of the revolution shaft, and aligning the detecting part of the rotating speed measuring device with the detected piece on the rotation shaft;
step S23, starting the cement paste mixer and the rotating speed measuring device to start working, wherein when the cement paste mixer starts working, the rotating speed measuring device rotates along with the revolution shaft and directly measures the autorotation rotating speed of the revolution shaft; and reading the numerical value of the rotation speed of the rotation shaft after the rotation speed is stable, and recording.
Further, the calculation process of the rotation speed of the cement paste mixer is further as follows: transmitting the revolution speed of the revolution shaft and the rotation speed of the rotation shaft which are measured by the wireless transmission module to a computer in the form of digital signals, and receiving data by automatic detection software on the computer; then, the received revolution speed of the revolution shaft subtracts the rotation speed of the rotation shaft by the automatic detection software to obtain the rotation speed of the cement paste mixer, and original records and reports are formed and finally stored in a database of the server.
The invention also provides a rotation speed measuring device for the rotation speed of the cement paste mixer, which comprises
A main control chip;
the rotating speed sensor is connected to the main control chip;
the auxiliary circuit comprises a power supply auxiliary circuit, a signal receiving and transmitting auxiliary circuit and a crystal oscillator auxiliary circuit; the crystal oscillator auxiliary circuit is connected to the main control chip;
the power supply, the power supply auxiliary circuit and the main control chip are sequentially connected;
the wireless transmission module is connected to the main control chip;
the antenna assembly, the signal receiving and transmission auxiliary circuit and the main control chip are connected in sequence.
Further, the wireless transmission module is a bluetooth module.
Further, the main control chip and the wireless transmission module are integrated into a whole.
Further, the rotating speed sensor is a high-frequency magnetic resistance switch.
Further, the main control chip comprises a DVDD pin, an AVDD _ DREG pin, a DVDD _ USB pin, a P20 pin, an AVDDs/AVDD _ SOC pin, an AVDD1 pin, an AVDD2 pin, an AVDD3 pin, an AVDD4 pin, an AVDD _ GUARD pin, an RF _ P pin, an RF _ N pin, a P23 pin, a P24 pin, an XOSSC32M _ Q1 pin, an xosc 32M _ Q2 pin, a DCOUPL pin, an RBLAS pin and a GND pin; the GND pin is grounded;
the revolution speed sensor comprises three pins, wherein one pin is grounded, the other pin is connected to the P20 pin, and the third pin is connected to the DVDD _ USB pin;
the power auxiliary circuit comprises an inductor L1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; the positive pole of the power supply is connected with one end of an inductor L1, and the other end of the inductor L1 is respectively connected with a DVDD pin, an AVDD _ DREG pin, an AVDDS/AVDD _ SOC pin, an AVDD1 pin, an AVDD2 pin, an AVDD3 pin and an AVDD4 pin; one end of the capacitor C1 is connected between the other end of the inductor L1 and the AVDD _ DREG pin; one end of the capacitor C3 is connected between the other end of the inductor L1 and the DVDD pin; one end of the capacitor C4 is connected between the other end of the inductor L1 and the AVDDS/AVDD _ SOC pin; one end of the capacitor C5 is connected between the other end of the inductor L1 and the AVDD3 pin; an AVDD1 pin, an AVDD2 pin and an AVDD4 pin are connected in parallel and then are respectively connected with one end of a capacitor C6, one end of a capacitor C8 and the other end of an inductor L1; one end of the capacitor C7 is connected between the other end of the inductor L1 and the AVDD _ GUARD pin; one end of the capacitor C9 is connected to the other end of the inductor L1; the other ends of the capacitor C1, the capacitor C3, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 are grounded respectively;
the antenna assembly comprises an external antenna pedestal U2 and an antenna;
the signal receiving and transmitting auxiliary circuit comprises an external antenna seat U2, a resistor R7, a resistor R6, a capacitor C10, a capacitor C12, a capacitor C13, a capacitor C14, an inductor L2, an inductor L3, an inductor L9 and an inductor L10; one end of the resistor R6 is connected to a contact of the external antenna pedestal U2, the other contact of the external antenna pedestal U2 is grounded, one end of the resistor R7 is connected to the antenna, and the other ends of the resistor R6 and the resistor R7 are connected in parallel and then connected to one end of the inductor L10; one end of the inductor L9 and the other end of the capacitor C14 are connected in parallel and then connected to the other end of the inductor L10; the other end of the capacitor C14 is grounded; one end of the inductor L3 and one end of the capacitor C13 are connected in parallel and then connected to the other end of the inductor L9; one end of the capacitor C10 and one end of the inductor L2 are connected in parallel and then connected to the other end of the capacitor C13; the other end of the inductor L2 is grounded; the other end of the capacitor C10 is connected to the RF _ P pin; one end of the capacitor C12 and one end of the capacitor C11 are connected in parallel and then connected to the other end of the inductor L3; the other end of the capacitor C12 is grounded; the other end of the capacitor C11 is connected to the RF _ N pin;
the crystal oscillator auxiliary circuit comprises a clock crystal Y2, a crystal oscillator crystal Y1, a resistor R5, a capacitor C2, a capacitor C15, a capacitor C16, a capacitor C17 and a capacitor C18;
the crystal oscillator crystal Y1 comprises a crystal oscillator pin 1, a resonance pin 3, a grounding pin 2 and a grounding pin 4;
one end of the resistor R5 is connected to the RBLAS pin, and the other end of the resistor R5 is grounded;
one end of the capacitor C2 is connected to the DCOUPL pin, and the other end is grounded;
one end of the capacitor C15 is grounded, and the other end of the capacitor C15 is connected in parallel with a crystal oscillator pin 1 of a crystal oscillator crystal Y1 and then is connected with a XOSSC32M _ Q2 pin;
the grounding pin 2 and the grounding pin 4 of the crystal oscillator crystal Y1 are respectively grounded;
one end of the capacitor C16 is grounded, and the other end of the capacitor C16 is connected with a resonance pin 3 of a crystal oscillator crystal Y1 in parallel and then is connected with a XOSSC32M _ Q1 pin;
one ends of the capacitor C17 and the capacitor C18 are respectively grounded; the other end of the capacitor C17 is connected with one end of the time crystal Y2 in parallel and then is connected with a P23 pin; the other end of the capacitor C18 and the other end of the time crystal Y2 are connected in parallel and then connected to a P24 pin.
The invention has the following advantages: the invention provides a method for measuring the rotation speed of a cement paste mixer, which comprises a revolution speed measuring process of a revolution shaft, a relative rotation speed measuring process of the rotation shaft and a rotation speed calculating process of the cement paste mixer; the calculation process of the autorotation rotating speed of the cement paste mixer comprises the following steps: and subtracting the revolution speed of the revolution shaft from the measured rotation speed of the revolution shaft to obtain the rotation speed of the cement paste mixer. The invention uses the principle of relative motion to subtract the revolution speed of the revolution shaft from the rotation speed of the rotation shaft to obtain the rotation speed of the cement paste mixer. The reduction ratio of the gear mechanism is determined without disassembling the cement paste mixer, so that the potential safety hazard caused by disassembling equipment is eliminated, and the working efficiency is improved. The actual rotation speed of the rotating shaft and the actual revolution speed of the rotating shaft are directly measured, so that the rotation speed of the cement paste mixer is calculated, error change can be found in time, errors caused by gear abrasion (namely errors between theoretical conversion and the actually measured rotation speed) are avoided, and the measurement precision is improved.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a prior art cement paste mixer.
FIG. 2 is a schematic structural diagram of the rotation speed measuring device and the detected piece installed in the cement paste mixer.
FIG. 3 is a schematic diagram of the measurement method of the present invention.
Fig. 4 is a schematic diagram of a PCB circuit board structure of an embodiment of the rotational speed measuring apparatus of the present invention.
Fig. 5 is a circuit diagram of an embodiment of a rotation speed measuring device according to the present invention.
Fig. 6 is a schematic structural diagram of an embodiment of the rotational speed measuring apparatus according to the present invention.
Description of reference numerals:
100. a cement paste mixer 101, mixing blades 102, a rotating shaft 103, a revolution shaft 104 and a mixer frame;
200. a rotating speed measuring device 201, a first shell 202, a PCB 203, a power supply 204 and a second shell;
300. a detected piece;
Vrevolution of the sunRevolution speed of the revolution shaft;
Vself-rotationThe autorotation speed of the cement paste mixer is controlled;
Vrelative rotationAnd the rotation speed of the stirring blades relative to the revolution shaft.
Detailed Description
Please refer to fig. 1 to 6. In fig. 3, the revolution measuring module and the rotation measuring module are both the rotation speed measuring device 200. In fig. 5, U3 is a magnetic resistance switch, the right end of the resistor R7 is connected to the antenna, and BATTERY is a power supply.
In fig. 6, the main control chip, the rotation speed sensor, the auxiliary circuit, and the wireless transmission module are integrated on the PCB 202, the power source 203 is located at the bottom of the PCB 202, the two are electrically connected, and then the PCB 202 and the power source 203 are packaged by the first housing 201 and the second housing 204.
The invention provides a method for measuring the rotation speed of a cement paste mixer, which comprises a revolution speed measuring process of a revolution shaft 103, a relative rotation speed measuring process of a rotation shaft 102 and a rotation speed calculating process of the cement paste mixer;
the rotation speed V of the cement paste mixerSelf-rotationThe calculation process of (2) includes: the measured relative rotation speed V of the rotation shaft 102Relative rotationMinus the revolution speed V of the revolution shaft 103Revolution of the sunObtaining the autorotation speed V of the cement paste mixerSelf-rotation。
The invention uses the principle of relative motion to subtract the revolution speed of the revolution shaft 103 from the rotation speed of the revolution shaft 102 to obtain the rotation speed of the cement paste mixer. The reduction ratio of the gear mechanism is determined without disassembling the cement paste mixer, so that the potential safety hazard caused by disassembling equipment is eliminated, and the working efficiency is improved. The actual rotation speed of the rotating shaft and the actual revolution speed of the rotating shaft are directly measured, so that the rotation speed of the cement paste mixer is calculated, error change can be found in time, errors caused by gear abrasion (namely errors between theoretical conversion and the actually measured rotation speed) are avoided, and the measurement precision is improved.
Revolution speed V of the revolution shaft 103Revolution of the sunThe measurement process comprises the following steps:
step S11, fixing the detected piece 300 on the revolution shaft 103;
step S12, fixing the rotating speed measuring device 200 on the mixer frame 104, and adjusting the position and the angle of the rotating speed measuring device 200 to make the detecting part of the rotating speed measuring device 200 align with the detected object 300 on the revolution shaft 103; in a specific implementation, if the detection portion of the rotation speed measuring device 200 employs a grating sensor, the detected object 300 employs a reflective sheet. If the detection part of the rotation speed measuring device 200 adopts a high-frequency magnetic resistance switch, the detected piece 300 adopts a magnetic sticker. Of course, in other embodiments, other implementations are possible. The rotation speed measuring device 200 may be an existing measuring device, or may be newly designed.
Step S13, starting the cement paste mixer 100 and the rotation speed measuring device 200 to start working, when the cement paste mixer 100 starts working, the rotation speed measuring device 200 starts to directly measure the revolution rotation speed of the revolution shaft 103, and after the rotation speed is stable, the revolution rotation speed V is readRevolution of the sunAnd recording the numerical value of (c).
Relative rotation speed V of the rotation shaft 102Relative rotationThe measurement process comprises the following steps:
step S21, fixing the detected object 300 on the rotation shaft 102;
step S22, fixing the rotation speed measuring device 200 on the eccentric seat of the revolution shaft 103, and aligning the detecting part of the rotation speed measuring device 200 with the detected object 300 on the rotation shaft 102; the invention fixes the rotating speed measuring device 200 on the revolution shaft 103 to realize the relative rotation rotating speed V of the revolution shaft 102Relative rotationThe measurement of (2).
Step S23, starting the mixer 100 and the rotation speed measuring device 200, when the mixer 100 starts to work, the rotation speed measuring device 300 rotates with the revolution axis 103 and the relative rotation speed V of the rotation axis 102Relative rotationStarting direct measurement; reading the rotation speed V of the rotation shaft 102 after the rotation speed is stableRelative rotationAnd recording the numerical value of (c).
The rotation speed V of the cement paste mixerSelf-rotationThe calculation process of (2) further comprises: the revolution rotating speed V of the revolution shaft 103 is measured by the wireless transmission moduleRevolution of the sunAnd the relative rotation speed V of the rotation shaft 102Relative rotationThe data are transmitted to a computer in a digital signal form, and automatic detection software on the computer receives the data; then the automatic detection software receives the relative rotation speed V of the rotation shaft 102Relative rotationMinus the revolution speed V of the revolution shaft 103Revolution of the sunObtaining the autorotation speed V of the cement paste mixerSelf-rotationAnd forms the original record and report, and finally stores in the database of the server. In a specific embodiment, the automatic detection software adopts ZDJC-V1.0, and then a calculation formula is defined according to the calculation principle.
The invention also provides a rotation speed measuring device for the rotation speed of the cement paste mixer, which comprises
A main control chip;
the rotating speed sensor is connected to the main control chip;
the auxiliary circuit comprises a power supply auxiliary circuit, a signal receiving and transmitting auxiliary circuit and a crystal oscillator auxiliary circuit; the crystal oscillator auxiliary circuit is connected to the main control chip;
the power supply, the power supply auxiliary circuit and the main control chip are sequentially connected;
the wireless transmission module is connected to the main control chip;
the antenna assembly, the signal receiving and transmission auxiliary circuit and the main control chip are connected in sequence.
In the implementation, a preferred embodiment is as follows: the wireless transmission module is a Bluetooth module.
The main control chip and the wireless transmission module are integrated into a whole.
The rotating speed sensor is a high-frequency magnetic resistance switch.
The main control chip comprises a DVDD pin, an AVDD _ DREG pin, a DVDD _ USB pin, a P20 pin, an AVDDS/AVDD _ SOC pin, an AVDD1 pin, an AVDD2 pin, an AVDD3 pin, an AVDD4 pin, an AVDD _ GUARD pin, an RF _ P pin, an RF _ N pin, a P23 pin, a P24 pin, an XOSSC32M _ Q1 pin, an XOSSC32M _ Q2 pin, a DCOUPL pin, an RBLAS pin and a GND pin; the GND pin is grounded;
the revolution speed sensor comprises three pins, wherein one pin is grounded, the other pin is connected to the P20 pin, and the third pin is connected to the DVDD _ USB pin;
the power auxiliary circuit comprises an inductor L1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; the positive pole of the power supply is connected with one end of an inductor L1, and the other end of the inductor L1 is respectively connected with a DVDD pin, an AVDD _ DREG pin, an AVDDS/AVDD _ SOC pin, an AVDD1 pin, an AVDD2 pin, an AVDD3 pin and an AVDD4 pin; one end of the capacitor C1 is connected between the other end of the inductor L1 and the AVDD _ DREG pin; one end of the capacitor C3 is connected between the other end of the inductor L1 and the DVDD pin; one end of the capacitor C4 is connected between the other end of the inductor L1 and the AVDDS/AVDD _ SOC pin; one end of the capacitor C5 is connected between the other end of the inductor L1 and the AVDD3 pin; an AVDD1 pin, an AVDD2 pin and an AVDD4 pin are connected in parallel and then are respectively connected with one end of a capacitor C6, one end of a capacitor C8 and the other end of an inductor L1; one end of the capacitor C7 is connected between the other end of the inductor L1 and the AVDD _ GUARD pin; one end of the capacitor C9 is connected to the other end of the inductor L1; the other ends of the capacitor C1, the capacitor C3, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 are grounded respectively;
the antenna assembly comprises an external antenna pedestal U2 and an antenna;
the signal receiving and transmitting auxiliary circuit comprises an external antenna seat U2, a resistor R7, a resistor R6, a capacitor C10, a capacitor C12, a capacitor C13, a capacitor C14, an inductor L2, an inductor L3, an inductor L9 and an inductor L10; one end of the resistor R6 is connected to a contact of the external antenna pedestal U2, the other contact of the external antenna pedestal U2 is grounded, one end of the resistor R7 is connected to the antenna, and the other ends of the resistor R6 and the resistor R7 are connected in parallel and then connected to one end of the inductor L10; one end of the inductor L9 and the other end of the capacitor C14 are connected in parallel and then connected to the other end of the inductor L10; the other end of the capacitor C14 is grounded; one end of the inductor L3 and one end of the capacitor C13 are connected in parallel and then connected to the other end of the inductor L9; one end of the capacitor C10 and one end of the inductor L2 are connected in parallel and then connected to the other end of the capacitor C13; the other end of the inductor L2 is grounded; the other end of the capacitor C10 is connected to the RF _ P pin; one end of the capacitor C12 and one end of the capacitor C11 are connected in parallel and then connected to the other end of the inductor L3; the other end of the capacitor C12 is grounded; the other end of the capacitor C11 is connected to the RF _ N pin;
the crystal oscillator auxiliary circuit comprises a clock crystal Y2, a crystal oscillator crystal Y1, a resistor R5, a capacitor C2, a capacitor C15, a capacitor C16, a capacitor C17 and a capacitor C18;
the crystal oscillator crystal Y1 comprises a crystal oscillator pin 1, a resonance pin 3, a grounding pin 2 and a grounding pin 4;
one end of the resistor R5 is connected to the RBLAS pin, and the other end of the resistor R5 is grounded;
one end of the capacitor C2 is connected to the DCOUPL pin, and the other end is grounded;
one end of the capacitor C15 is grounded, and the other end of the capacitor C15 is connected in parallel with a crystal oscillator pin 1 of a crystal oscillator crystal Y1 and then is connected with a XOSSC32M _ Q2 pin;
the grounding pin 2 and the grounding pin 4 of the crystal oscillator crystal Y1 are respectively grounded;
one end of the capacitor C16 is grounded, and the other end of the capacitor C16 is connected with a resonance pin 3 of a crystal oscillator crystal Y1 in parallel and then is connected with a XOSSC32M _ Q1 pin;
one ends of the capacitor C17 and the capacitor C18 are respectively grounded; the other end of the capacitor C17 is connected with one end of the time crystal Y2 in parallel and then is connected with a P23 pin; the other end of the capacitor C18 and the other end of the time crystal Y2 are connected in parallel and then connected to a P24 pin.
In a specific embodiment:
the rotation speed measuring device 200 mainly includes: the main control chip is composed of an ultra-low power consumption sensor controller, a Microcontroller (MCU) and a wireless transmission module (Bluetooth module), all components are integrated on a circuit board and secondary development of a Microcontroller (MCU) program is carried out, automatic collection, timing and speed calculation of revolution and rotation speed signals of the stirring machine are achieved, and the wireless transmission module transmits revolution speed and rotation speed data to a computer. The development of the rotational speed measuring device 200 is critical to the secondary development of component selection, layout, circuit design and Microcontroller (MCU) program. The module is selected to have a small size, a light weight and a reasonable layout in a small space, and the size (diameter and height) of the whole rotation speed measuring device 200 is about phi 25mm and 5.5mm, and the weight is about (20-40) g.
The circuit diagram of the rotation speed measuring device 200 is shown in fig. 5, and the functions and types of the components are as follows:
the power supply adopts a button cell, so that the button cell is convenient and easy to purchase, and a designed power supply circuit is responsible for converting a 3V power supply into a 3.3V working power supply and managing the power supply, and comprises under-voltage, overload, short-circuit alarm prompt and the like. The power supply may be a CR2302 coin cell, about 20mm in size (diameter x height) by 2mm and weighing about 3 g.
The rotating speed sensor is responsible for converting a rotating speed signal into a pulse signal and sending the pulse signal into the rotating speed signal acquisition module, a low-power consumption full-pole high-frequency magnetic resistance switch MR201 can be adopted, and the MR201 is a full-pole magnetic switch which integrates a Tunnel Magnetic Resistance (TMR) sensor and a CMOS technology and is developed for high-sensitivity, high-speed, low-power consumption and high-precision application. The MR201 adopts a high-precision push-pull half-bridge TMR magnetic sensor and a CMOS integrated circuit, comprises a TMR voltage generator, a comparator, a Schmitt trigger and a CMOS output circuit, and can convert a changed magnetic field signal into a digital voltage signal for output. MR201 provides a temperature compensated power supply through an internal voltage regulator and allows a wide operating voltage range.
The working voltage of the MR201 is 1.8-5.5V, the average power consumption is 5uA, and the switching frequency is as follows: 100kHz, operating temperature: the temperature is-40 ℃ to 125 ℃, the device has the characteristics of low-voltage operation, extremely high response frequency, microampere-level power supply current, wide operating temperature range and the like, and the acquisition frequency can meet the technical requirement of (20-40000) r/min.
And thirdly, the master control chip integrates ultra-low power consumption sensor control, a Microcontroller (MCU) and a Bluetooth module. The ultra-low power consumption sensor is used for controlling the collected rotating speed pulse signals to be subjected to level conversion, shake elimination, filtering and direction identification, and then the rotating speed pulse signals are sent to a Microcontroller (MCU) to be subjected to speed calculation and processing. And a Microcontroller (MCU) data microprocessor is responsible for counting the rotating speed pulse signals at a high speed and accurately timing, and the speed is obtained through accurate timing and a digital differential algorithm. The Bluetooth module is responsible for sending the speed signal calculated by the microprocessor to the computer in a wireless mode. The main control chip can adopt a Texas instruments CC2640 series device as the main control chip, because the CC2640 is a wireless Microcontroller (MCU), and the Bluetooth and the MCU are integrated together, the main control chip has small volume and ultra-low power consumption, and is very suitable for the application of a small-volume control system powered by a battery. CC2640 belongs to SimpleLinkTMA high efficiency, ultra low power 2.4GHz RF device in the CC26xx family. The low-power-consumption CC2640 device has extremely low active RF and MCU current and low power consumption mode current consumption, can ensure excellent battery service life, is suitable for the application of small button battery power supply, and comprises a 32-bit
Figure BDA0002323555590000111
Figure BDA0002323555590000112
The M3 kernel (48 MHz as the Microcontroller (MCU)) and has rich peripheral functionality including a unique ultra low power sensor controller. The sensor controller is well suited for connection to external sensors and for autonomous collection of analog and digital data in the rest of the system in sleep mode, with an operating frequency that meets the specifications of (20-40000) r/min, with dimensions (length, width, height) of about phi 16mm, 11mm, 2mm, and a weight of about 13 g.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.

Claims (9)

1. A method for measuring the autorotation rotating speed of a cement paste mixer is characterized by comprising the following steps: the method comprises a revolution rotating speed measuring process of a revolution shaft, a relative rotation rotating speed measuring process of the rotation shaft and a calculation process of the rotation rotating speed of a cement paste mixer;
the calculation process of the autorotation rotating speed of the cement paste mixer comprises the following steps: and subtracting the revolution speed of the revolution shaft from the measured rotation speed of the revolution shaft to obtain the rotation speed of the cement paste mixer.
2. The method for measuring the autorotation speed of the cement paste mixer according to claim 1, wherein the method comprises the following steps: the revolution rotating speed measuring process of the revolution shaft comprises the following steps:
step S11, fixing the detected piece on the revolution shaft;
step S12, fixing the rotating speed measuring device on the stirring frame, and adjusting the position and the angle of the rotating speed measuring device to make the detection part of the rotating speed measuring device align with the detected piece on the revolution axis;
and step S13, starting the cement paste mixer and the rotating speed measuring device to start working, wherein when the cement paste mixer starts working, the rotating speed measuring device starts to directly measure the revolution rotating speed of the revolution shaft, and after the rotating speed is stable, the numerical value of the revolution rotating speed is read and recorded.
3. The method for measuring the rotation speed of a cement paste mixer according to claim 1 or 2, wherein: the relative rotation speed measuring process of the rotation shaft comprises the following steps:
step S21, fixing the detected piece on the rotation shaft;
step S22, fixing the rotating speed measuring device on the eccentric seat of the revolution shaft, and aligning the detecting part of the rotating speed measuring device with the detected piece on the rotation shaft;
step S23, starting the cement paste mixer and the rotating speed measuring device to start working, wherein when the cement paste mixer starts working, the rotating speed measuring device rotates along with the revolution shaft and directly measures the autorotation rotating speed of the revolution shaft; and reading the numerical value of the rotation speed of the rotation shaft after the rotation speed is stable, and recording.
4. The method for measuring the autorotation speed of the cement paste mixer according to claim 1, wherein the method comprises the following steps: the calculation process of the autorotation rotating speed of the cement paste mixer further comprises the following steps: transmitting the revolution speed of the revolution shaft and the rotation speed of the rotation shaft which are measured by the wireless transmission module to a computer in the form of digital signals, and receiving data by automatic detection software on the computer; then, the received revolution speed of the revolution shaft subtracts the rotation speed of the rotation shaft by the automatic detection software to obtain the rotation speed of the cement paste mixer, and original records and reports are formed and finally stored in a database of the server.
5. The utility model provides a rotational speed measuring device of net thick liquid mixer rotation rotational speed of cement which characterized in that: comprises a main control chip;
the rotating speed sensor is connected to the main control chip;
the auxiliary circuit comprises a power supply auxiliary circuit, a signal receiving and transmitting auxiliary circuit and a crystal oscillator auxiliary circuit; the crystal oscillator auxiliary circuit is connected to the main control chip;
the power supply, the power supply auxiliary circuit and the main control chip are sequentially connected;
the wireless transmission module is connected to the main control chip;
the antenna assembly, the signal receiving and transmission auxiliary circuit and the main control chip are connected in sequence.
6. The apparatus for measuring the rotational speed of a cement paste mixer according to claim 5, wherein: the wireless transmission module is a Bluetooth module.
7. The apparatus for measuring the rotational speed of a cement paste mixer according to claim 6, wherein: the main control chip and the wireless transmission module are integrated into a whole.
8. The apparatus for measuring the rotational speed of a cement paste mixer according to claim 7, wherein: the rotating speed sensor is a high-frequency magnetic resistance switch.
9. The apparatus for measuring the rotational speed of a cement paste mixer according to claim 8, wherein: the main control chip comprises a DVDD pin, an AVDD _ DREG pin, a DVDD _ USB pin, a P20 pin, an AVDDS/AVDD _ SOC pin, an AVDD1 pin, an AVDD2 pin, an AVDD3 pin, an AVDD4 pin, an AVDD _ GUARD pin, an RF _ P pin, an RF _ N pin, a P23 pin, a P24 pin, an XOSSC32M _ Q1 pin, an XOSSC32M _ Q2 pin, a DCOUPL pin, an RBLAS pin and a GND pin; the GND pin is grounded;
the revolution speed sensor comprises three pins, wherein one pin is grounded, the other pin is connected to the P20 pin, and the third pin is connected to the DVDD _ USB pin;
the power auxiliary circuit comprises an inductor L1, a capacitor C1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and a capacitor C9; the positive pole of the power supply is connected with one end of an inductor L1, and the other end of the inductor L1 is respectively connected with a DVDD pin, an AVDD _ DREG pin, an AVDDS/AVDD _ SOC pin, an AVDD1 pin, an AVDD2 pin, an AVDD3 pin and an AVDD4 pin; one end of the capacitor C1 is connected between the other end of the inductor L1 and the AVDD _ DREG pin; one end of the capacitor C3 is connected between the other end of the inductor L1 and the DVDD pin; one end of the capacitor C4 is connected between the other end of the inductor L1 and the AVDDS/AVDD _ SOC pin; one end of the capacitor C5 is connected between the other end of the inductor L1 and the AVDD3 pin; an AVDD1 pin, an AVDD2 pin and an AVDD4 pin are connected in parallel and then are respectively connected with one end of a capacitor C6, one end of a capacitor C8 and the other end of an inductor L1; one end of the capacitor C7 is connected between the other end of the inductor L1 and the AVDD _ GUARD pin; one end of the capacitor C9 is connected to the other end of the inductor L1; the other ends of the capacitor C1, the capacitor C3, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8 and the capacitor C9 are grounded respectively;
the antenna assembly comprises an external antenna pedestal U2 and an antenna;
the signal receiving and transmitting auxiliary circuit comprises an external antenna seat U2, a resistor R7, a resistor R6, a capacitor C10, a capacitor C12, a capacitor C13, a capacitor C14, an inductor L2, an inductor L3, an inductor L9 and an inductor L10; one end of the resistor R6 is connected to a contact of the external antenna pedestal U2, the other contact of the external antenna pedestal U2 is grounded, and one end of the resistor R7 is connected to the antenna; the other ends of the resistor R6 and the resistor R7 are connected in parallel and then connected to one end of the inductor L10; one end of the inductor L9 and the other end of the capacitor C14 are connected in parallel and then connected to the other end of the inductor L10; the other end of the capacitor C14 is grounded; one end of the inductor L3 and one end of the capacitor C13 are connected in parallel and then connected to the other end of the inductor L9; one end of the capacitor C10 and one end of the inductor L2 are connected in parallel and then connected to the other end of the capacitor C13; the other end of the inductor L2 is grounded; the other end of the capacitor C10 is connected to the RF _ P pin; one end of the capacitor C12 and one end of the capacitor C11 are connected in parallel and then connected to the other end of the inductor L3; the other end of the capacitor C12 is grounded; the other end of the capacitor C11 is connected to the RF _ N pin;
the crystal oscillator auxiliary circuit comprises a clock crystal Y2, a crystal oscillator crystal Y1, a resistor R5, a capacitor C2, a capacitor C15, a capacitor C16, a capacitor C17 and a capacitor C18;
the crystal oscillator crystal Y1 comprises a crystal oscillator pin 1, a resonance pin 3, a grounding pin 2 and a grounding pin 4;
one end of the resistor R5 is connected to the RBLAS pin, and the other end of the resistor R5 is grounded;
one end of the capacitor C2 is connected to the DCOUPL pin, and the other end is grounded;
one end of the capacitor C15 is grounded, and the other end of the capacitor C15 is connected in parallel with a crystal oscillator pin 1 of a crystal oscillator crystal Y1 and then is connected with a XOSSC32M _ Q2 pin;
the grounding pin 2 and the grounding pin 4 of the crystal oscillator crystal Y1 are respectively grounded;
one end of the capacitor C16 is grounded, and the other end of the capacitor C16 is connected with a resonance pin 3 of a crystal oscillator crystal Y1 in parallel and then is connected with a XOSSC32M _ Q1 pin;
one ends of the capacitor C17 and the capacitor C18 are respectively grounded; the other end of the capacitor C17 is connected with one end of the time crystal Y2 in parallel and then is connected with a P23 pin; the other end of the capacitor C18 and the other end of the time crystal Y2 are connected in parallel and then connected to a P24 pin.
CN201911307420.3A 2019-12-18 2019-12-18 Method and device for measuring rotation speed of cement paste mixer Pending CN111103435A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112798813A (en) * 2021-01-25 2021-05-14 河南科技大学 Method for testing rotating speed of revolution driven member in pair-rolling friction pair

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112798813A (en) * 2021-01-25 2021-05-14 河南科技大学 Method for testing rotating speed of revolution driven member in pair-rolling friction pair

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