CN214702550U - Vibrating screen motor bearing temperature detection device and system - Google Patents
Vibrating screen motor bearing temperature detection device and system Download PDFInfo
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- CN214702550U CN214702550U CN202022810948.7U CN202022810948U CN214702550U CN 214702550 U CN214702550 U CN 214702550U CN 202022810948 U CN202022810948 U CN 202022810948U CN 214702550 U CN214702550 U CN 214702550U
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Abstract
The utility model provides a shale shaker motor bearing temperature-detecting device and system, shale shaker motor bearing temperature-detecting device includes: the temperature detection module adopts a three-wire method bridge type measuring circuit with a PT100 platinum thermal resistor and is used for detecting the temperature of a bearing of a vibrating screen motor; the signal amplification circuit is used for amplifying the voltage signal output by the temperature detection module; the ZigBee module is used for data transmission of the device; the control module is used for controlling the device, and comprises a temperature conversion module, a temperature acquisition module and a control module, wherein the temperature conversion module is used for converting a voltage signal output by the signal amplification circuit into a corresponding temperature value and transmitting the converted temperature value to an upper computer through the ZigBee module; and the power supply circuit is used for supplying power to the temperature detection device of the bearing of the motor of the local vibrating screen. The power supply circuit comprises a lithium battery and a voltage stabilizing circuit. The vibrating screen motor bearing temperature detection system comprises the vibrating screen motor bearing temperature detection device. This novel be used for detecting shale shaker motor bearing temperature.
Description
Technical Field
The utility model relates to a temperature detect field, concretely relates to shale shaker motor bearing temperature-detecting device and system.
Background
The vibrating screen is widely applied to industries such as mines, coal, smelting, chemical industry, food and the like, and the utilization rate and the production performance of industrial raw materials are directly influenced by the working efficiency of the vibrating screen. The shale shaker generally needs work without interruption, along with the production going on, the long-time work of shale shaker motor, and motor bearing temperature can rise gradually, if the bearing temperature is too high and can not in time handle, probably can cause the incident.
The motor bearing temperature change can reflect the motor working state. The accurate detection of the temperature condition of the motor bearing of the vibrating screen plays an important role in judging the running condition of the motor bearing of the vibrating screen, for example, whether the bearing normally runs or breaks down can be judged according to temperature information. This is important to prevent safety accidents. However, there is currently no good strategy for monitoring the temperature conditions of the bearings of the motor of a vibrating screen.
Disclosure of Invention
Not enough to the above-mentioned of prior art, the utility model provides a shale shaker motor bearing temperature-detecting device and system for monitor shale shaker motor bearing temperature situation.
In a first aspect, the utility model provides a shale shaker motor bearing temperature-detecting device, include:
the temperature detection module adopts a three-wire method bridge type measuring circuit with a PT100 platinum thermal resistor and is used for detecting the temperature of a bearing of a vibrating screen motor;
the signal amplification circuit is used for amplifying the voltage signal output by the temperature detection module;
the ZigBee module is used for data transmission of the device;
the control module is used for controlling the device, and comprises a temperature conversion module, a temperature acquisition module and a control module, wherein the temperature conversion module is used for converting a voltage signal output by the signal amplification circuit into a corresponding temperature value and transmitting the converted temperature value to an upper computer through the ZigBee module;
the power supply circuit is used for supplying power to the temperature detection device of the bearing of the motor of the local vibrating screen;
the power supply circuit comprises a lithium battery and a voltage stabilizing circuit, and the voltage stabilizing circuit comprises a second connector J1, a first voltage stabilizing module and a second voltage stabilizing module;
the first voltage stabilization module comprises a first 5V voltage stabilization chip U1, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and a twelfth capacitor C12, wherein: the first end of the eighth capacitor C8 is connected IN parallel with the first end of the ninth capacitor C9, then is connected with a VCC power supply, and is connected with an IN pin of the first 5V voltage-stabilizing chip U1; the first end of the tenth capacitor C10 is connected in parallel with the first end of the twelfth capacitor C12, then is connected with the 5V power output end, and is connected with the OUT pin of the first 5V voltage-stabilizing chip U1; the second end of the eighth capacitor C8, the second end of the ninth capacitor C9, the second end of the tenth capacitor C10, the second end of the twelfth capacitor C12 and the ADJ pin of the first 5V regulator chip U1 are connected in parallel and then grounded to GND _ a;
the second voltage stabilizing module comprises an eleventh capacitor C11, a third capacitor C3, a second 5V voltage stabilizing chip U2 and a 3.3V voltage stabilizing chip, wherein: the first end of the eleventh capacitor C11 is connected IN parallel with the first end of the third capacitor C3, then is connected with a VCC power supply, and is connected with an IN pin of a second 5V voltage-stabilizing chip U2; the OUT pin of the second 5V voltage-stabilizing chip U2 is respectively connected with the first end of the first capacitor C1, the first end of the fourth capacitor C4, the first end of the seventh capacitor C7, the first end of the fifth capacitor C5 and the IN pin of the 3.3V voltage-stabilizing chip; the OUT pin of the 3.3V voltage-stabilizing chip is respectively connected with the VCC _3.3 power supply output end, the first end of the second capacitor C2 and the first end of the sixth capacitor C6; a second end of an eleventh capacitor C11, a second end of a third capacitor C3, an ADJ pin of a second 5V voltage stabilizing chip U2, a second end of a first capacitor C1, a second end of a fourth capacitor C4, a second end of a seventh capacitor C7, a second end of a fifth capacitor C5, an ADJ pin of a 3.3V voltage stabilizing chip, a second end of a second capacitor C2 and a second end of a sixth capacitor C6 are connected in parallel and then grounded GND _ D;
a pin 1 of the second connector J1 is connected with a VCC power supply, and a pin 2 of the second connector J1 is grounded GND;
a first 0 Ω resistor R0_1 is connected in series between the ground GND and the ground GND _ D, and a second 0 Ω resistor R0_2 is connected in series between the ground GND and the ground GND _ a.
Further, the three-wire method bridge type measuring circuit comprises a first output wire OUT +, a second output wire OUT-, a first resistor R1, a second resistor R2, a seventh resistor R7 and the PT100 platinum thermal resistor, wherein the first end of the PT100 platinum thermal resistor is connected with a 5V power supply through the first resistor R1, the second end of the PT100 platinum thermal resistor is connected with the 5V power supply after passing through the seventh resistor R7 and the second resistor R2 in sequence, and the second end of the PT100 platinum thermal resistor is grounded; the first output line OUT + is led OUT from a connecting line between the first end of the PT100 platinum thermal resistor and the first resistor R1, and the second output line OUT-is led OUT from a connecting line between the seventh resistor R7 and the second resistor R2;
the signal amplification circuit comprises an LM358 operational amplifier, a sixteenth resistor R16, an eighteenth resistor R18 and a first connector, wherein: the first end of the sixteenth resistor R16 is connected with the output end of the second output line OUT-, and the first end of the eighteenth resistor R18 is connected with the output end of the first output line OUT +; a second end of the sixteenth resistor R16 is respectively connected with a first end of the fifteenth resistor R15 and the IN 1-pin of the LM358 operational amplifier; a second end of the fifteenth resistor R15 is respectively connected to the first end of the thirteenth resistor R13 and the OUT1 pin of the LM358 operational amplifier; a second end of the thirteenth resistor R13 is respectively connected to the cathode of the first diode D1, the first end of the fourteenth capacitor C14, and the 1 st pin of the first connector; the anode of the first diode D1 is connected in parallel with the second end of the fourteenth capacitor C14 and then grounded; the 2 nd pin of the first connector is grounded; the VCC pin of the LM358 operational amplifier is connected with the 5V power supply; the GND pin of the LM358 operational amplifier is grounded; the second end of the eighteenth resistor R18 is respectively connected with the first end of the nineteenth resistor R19 and the IN1+ pin of the LM358 operational amplifier; a second terminal of the nineteenth resistor R19 is connected to ground.
Furthermore, the control module adopts a timer to time, and collects and uploads temperature data once every preset time length.
Furthermore, the control module adopts an STM32F103C8T6 processor, the quantity of PT100 platinum thermal resistors is one, the output end of the signal amplification circuit is connected to a signal input channel of an ADC of the STM32F103C8T6 processor, and the ADC of the STM32F103C8T6 processor only scans the channel connected with the output end of the signal amplification circuit when performing analog voltage conversion on input signals.
In a second aspect, the utility model provides a vibrating screen motor bearing temperature detection system, which comprises an upper computer and a vibrating screen motor bearing temperature detection device described in the above aspects; the upper computer and the vibrating screen motor bearing temperature detection device are matched for use.
Furthermore, the upper computer acquires temperature information transmitted by the ZigBee module through an NI-VISA (virtual Instrument architecture) interface by adopting an LABVIEW serial port data acquisition upper computer system.
The utility model has the advantages that,
the utility model provides a shale shaker motor bearing temperature-detecting device and system can utilize PT100 thermal resistance temperature sensor to detect motor bearing temperature variation, transmits through bridge type measuring circuit and signal amplification circuit and carries out voltage signal and temperature signal conversion and send the motor temperature data that obtains through the Zigbee module with the conversion to the host computer in real time for control module, and it is visible can effectually detect shale shaker motor bearing temperature.
Furthermore, the utility model relates to a principle is reliable, and simple structure has very extensive application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a vibrating screen motor bearing temperature detection device according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an embodiment of the three-wire bridge measurement circuit of the present invention.
Fig. 3 is a schematic circuit diagram of an embodiment of the signal amplifying circuit of the present invention.
Fig. 4 is a schematic circuit diagram of an embodiment of the ZigBee module of the present invention.
Fig. 5 is a schematic circuit diagram of an embodiment of a voltage regulator circuit according to the present invention.
FIG. 6 is a schematic block diagram of one embodiment of a vibrating screen motor bearing temperature detection system of the present invention.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Fig. 1 is a schematic block diagram of an apparatus according to an embodiment of the present invention.
As shown in fig. 1, the apparatus 100 includes:
the temperature detection module 101 is used for detecting the temperature of a bearing of a vibrating screen motor by adopting a three-wire method bridge type measuring circuit with a PT100 platinum thermal resistor;
the signal amplification circuit 102 is configured to amplify the voltage signal output by the temperature detection module 101;
the ZigBee module 103 is used for data transmission of the device;
the control module 104 is used for controlling the device, and comprises a temperature conversion module used for converting the voltage signal output by the signal amplification circuit 102 into a corresponding temperature value and transmitting the converted temperature value to an upper computer through the ZigBee module 103;
and the power supply circuit 105 is used for supplying power to the temperature detection device of the motor bearing of the local vibrating screen.
During the use, detect shale shaker motor bearing temperature in real time through temperature detection module 101, amplify the voltage signal of temperature detection module 101 output in real time through signal amplification circuit 102 and handle, convert the voltage signal of signal amplification circuit 102 output into corresponding temperature value in real time through control module 104 to upload the temperature value that obtains of conversion to the host computer in real time through zigBee module 103. The power supply circuit 105 is used for supplying power to the device. The control module 104 is used for control of the apparatus.
Temperature detection module 101
The temperature detection module 101 is a module that collects a non-electric quantity temperature signal of the motor bearing and converts the collected non-electric quantity temperature signal into a voltage signal that can be read by the control module 104.
1.1 temperature sensor model selection
Temperature sensors can be generally classified into contact type and non-contact type. The non-contact temperature sensor can keep better stability when high-temperature measurement is carried out. When the low-temperature measurement is carried out, a larger error exists because the non-contact temperature measurement cannot carry out heat exchange with the measured object. And the sensors used for contact temperature measurement, such as thermal resistors, thermocouples and the like, have better stability during low-temperature measurement.
The normal working temperature range of the motor bearing generally cannot exceed 80 ℃, the low-temperature measurement is performed, in order to guarantee the stability of the system, the thermal resistor is adopted for detecting the temperature of the bearing, and the PT100 thermal resistor is specifically adopted as a temperature measuring sensor. When the temperature measuring sensor is used, the temperature measuring sensor can be arranged at the supporting position of a motor bearing or the bearing bush position of the motor bearing to measure the temperature of the motor bearing.
The PT100 thermal resistor is a platinum thermal resistor having a resistance value of 100 Ω when the temperature is 0 ℃. The platinum resistor has high resistivity, although the resistance and the temperature are in a nonlinear relation, the nonlinearity is small, the material for manufacturing the thermal resistor is easy to purify, the reproducibility is good, the reasonable use can obtain high measurement precision, the measurement range of the thermal resistor is wide, and the physical and chemical properties are stable.
The purity of platinum is generally expressed in terms of a Baidu resistance ratio W100To indicate. Its expression is W100＝R100/R0In the formula, R100Represents the resistance value, R, of the platinum resistor at 100 DEG C0The resistance of the platinum resistor at 0 ℃ is shown. W100The larger the platinum resistance, the higher the purity of the platinum resistance. General industrial platinum resistor W100Should be greater than 1.3850. The platinum resistance is related to temperature by:
when the temperature is-200 DEG C<t<At 0 ℃, R (t) ═ R0[1+At+Bt2+Ct3(t-100)](ii) a When t is more than or equal to 0 ℃ and less than or equal to 850 ℃, R (t) is R0(1+At+Bt2) Wherein R is0The resistance value of the platinum thermistor at zero temperature, R of the PT100 platinum thermistor used in this example0Is 100 omega; r (t) represents the resistance value of the platinum thermistor at the temperature t, and A, B, C represents the parameter of the platinum thermistor.
1.2 measurement Circuit
In this embodiment, a three-wire system connection method is adopted for the temperature sensor. The three-wire connection method is a method of leading out a lead at one end and two leads at the other end of two ends of a thermal resistor.
1.3 schematic Circuit diagram of the temperature detection Module 101
In this embodiment, a three-wire system connection method is adopted for the temperature measuring sensor, so that the temperature detection module 101 is a three-wire method bridge type measurement circuit with a PT100 platinum thermistor (as the temperature measuring sensor), and a schematic circuit diagram of the three-wire method bridge type measurement circuit is shown in fig. 2.
Specifically, as shown in fig. 2, the three-wire method bridge measurement circuit includes a first output line OUT +, a second output line OUT-, a first resistor R1, a second resistor R2, a seventh resistor R7, and a PT100 platinum thermistor (corresponding to PT100 in fig. 2), a first end of the PT100 platinum thermistor is connected to a 5V power supply through the first resistor R1, a second end of the PT100 platinum thermistor is connected to the 5V power supply after passing through the seventh resistor R7 and the second resistor R2 in sequence, and a second end of the PT100 platinum thermistor is grounded; the first output line OUT + is led OUT from a connecting line between the first end of the PT100 platinum thermal resistor and the first resistor R1, and the second output line OUT-is led OUT from a connecting line between the seventh resistor R7 and the second resistor R2.
The first output line OUT + and the second output line OUT-are used cooperatively, and are output ends of the three-wire method bridge type measuring circuit, and are used for outputting voltage signals detected by the temperature detection module 101 through the PT100 platinum thermal resistor.
(II) Signal amplifying Circuit 102
In order to improve the detection sensitivity, the signal amplification circuit 102 is introduced in the present embodiment for amplifying the voltage signal output by the temperature detection module 101. In particular, the gain of the operational amplifier can be set by those skilled in the art. For example, in this embodiment, by properly setting the gain of the operational amplifier, when the temperature of the sensor end (temperature sensor) is about 100 ℃, the corresponding amplifier output voltage is + 3.3V.
Fig. 3 shows a schematic circuit diagram of the signal amplification circuit 102, the signal amplification circuit 102 employs an LM358 operational amplifier (adopting a +5V power supply mode), and has the characteristics of high gain and high bandwidth, and has an internal frequency compensation function.
Specifically, as shown in fig. 3, the signal amplification circuit 102 includes an LM358 operational amplifier, a sixteenth resistor R16, an eighteenth resistor R18, and a first connector (corresponding to the connector Header2 in fig. 3), wherein: the first end of the sixteenth resistor R16 is connected with the output end of the second output line OUT-, and the first end of the eighteenth resistor R18 is connected with the output end of the first output line OUT +; a second end of the sixteenth resistor R16 is respectively connected with a first end of the fifteenth resistor R15 and the IN 1-pin of the LM358 operational amplifier; a second end of the fifteenth resistor R15 is respectively connected to the first end of the thirteenth resistor R13 and the OUT1 pin of the LM358 operational amplifier; a second end of the thirteenth resistor R13 is respectively connected to the cathode of the first diode D1, the first end of the fourteenth capacitor C14, and the 1 st pin of the first connector; the anode of the first diode D1 is connected in parallel with the second end of the fourteenth capacitor C14 and then grounded; the 2 nd pin of the first connector is grounded; the VCC pin of the LM358 operational amplifier is connected with the 5V power supply; the GND pin of the LM358 operational amplifier is grounded; the second end of the eighteenth resistor R18 is respectively connected with the first end of the nineteenth resistor R19 and the IN1+ pin of the LM358 operational amplifier; a second terminal of the nineteenth resistor R19 is connected to ground.
(III) ZigBee module 103
In the present embodiment, the ZigBee module 103 employs a CC2530 radio chip designed and distributed by TI (texas instruments, usa). An 8051 single chip microcomputer and a wireless transceiver are integrated in the CC2530 radio frequency chip. The CC2530 has a plurality of different working modes, particularly a low power consumption mode, can greatly reduce the electric quantity loss of the system and is suitable for the system with low power consumption requirement. A schematic circuit diagram of the ZigBee module 103 in this embodiment is shown in fig. 4.
In this embodiment, the ZigBee module 103 supplies power by +3.3V, and has two instruction modes, i.e., an AT instruction and an HEX instruction. The command mode may be set via the P1.6 pin, which is AT command mode when high and HEX command mode when low. In order to prevent the module from failing to automatically RESET when working, the module is provided with a module RESET interface RESET. In order to prevent the BAUD rate from being abnormal in work or the designer cannot determine the set BAUD rate, the module is provided with a BAUD rate RESET interface BAUD _ RESET, and when the pin is in a low level, the BAUD rate of the ZigBee module 103 is RESET to a default value 115200. In order to facilitate the observation of the working state of the module by a user, the module is provided with pins P1.2 and P1.3 which are respectively used for indicating the network access state and the running state of the module. The low level of the P1.2 pin indicates that the module is added into the network, and the high level indicates that the module has no network. The P1.3 pin is low level to indicate that the module is operating normally, and high level to indicate that the module is not operating. The pins P1.4 and P1.5 are the serial RX and TX pins of the module, and are used for serial communication with the control module 104.
(IV) Power supply Circuit 105
In the present embodiment, the power supply circuit 105 includes a lithium battery for supplying power and a voltage stabilizing circuit for stabilizing voltage.
In this embodiment, the voltage regulator circuit may employ AMS1117-5 (which is a 5V voltage regulator chip) and AMS1117-3.3 (which is a 3.3V voltage regulator chip) in the AMS1117 series voltage regulator chip. The AMS1117 series voltage stabilizing chip is a three-terminal linear voltage stabilizing device, and has the advantages of simple application circuit, small package and small occupation of PCB resources.
In this embodiment, the lithium battery voltage is + 7-8V, and the voltage stabilizing circuit includes second connector J1, first voltage stabilizing module and second voltage stabilizing module, and specifically, second connector J1 is used for inserting lithium battery voltage, and first voltage stabilizing module is used for converting the lithium battery voltage that inserts into +5V voltage through a 5V voltage stabilizing chip, and second voltage stabilizing module is used for obtaining 3.3V voltage after the lithium battery voltage that second connector J1 inserts is stabilized voltage through a 5V voltage stabilizing chip and a 3.3V voltage stabilizing chip. The power supply circuit 105 provides a +5V power supply voltage through the first voltage stabilizing module and provides a +3.3V power supply voltage through the second voltage stabilizing module, and is used for supplying power required by the device.
Specifically, a schematic circuit diagram of the voltage stabilizing circuit is shown in fig. 5. Referring to fig. 5, in the voltage stabilizing circuit:
the first voltage stabilizing module comprises a first 5V voltage stabilizing chip U1 (adopting an AMS1117-5 chip), an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and a twelfth capacitor C12, wherein: the first end of the eighth capacitor C8 is connected IN parallel with the first end of the ninth capacitor C9, then is connected with a VCC power supply, and is connected with an IN pin of the first 5V voltage-stabilizing chip U1; the first end of the tenth capacitor C10 is connected in parallel with the first end of the twelfth capacitor C12, then is connected with the 5V power output end, and is connected with the OUT pin of the first 5V voltage-stabilizing chip U1; the second end of the eighth capacitor C8, the second end of the ninth capacitor C9, the second end of the tenth capacitor C10, the second end of the twelfth capacitor C12 and the ADJ pin of the first 5V regulator chip U1 are connected in parallel and then grounded to GND _ a;
the second voltage stabilizing module comprises an eleventh capacitor C11, a third capacitor C3, a second 5V voltage stabilizing chip U2 (adopting AMS1117-5 chip as well) and a first 3.3V voltage stabilizing chip U3 (adopting AMS1117-3.3 chip), wherein: the first end of the eleventh capacitor C11 is connected IN parallel with the first end of the third capacitor C3, then is connected with a VCC power supply, and is connected with an IN pin of a second 5V voltage-stabilizing chip U2; the OUT pin of the second 5V voltage-stabilizing chip U2 is respectively connected with the first end of the first capacitor C1, the first end of the fourth capacitor C4, the first end of the seventh capacitor C7, the first end of the fifth capacitor C5 and the IN pin of the first 3.3V voltage-stabilizing chip U3; the OUT pin of the first 3.3V voltage stabilization chip U3 is respectively connected with a VCC _3.3 power supply output end (used for providing a required 3.3V power supply for the device), a first end of a second capacitor C2 and a first end of a sixth capacitor C6; a second end of the eleventh capacitor C11, a second end of the third capacitor C3, an ADJ pin of the second 5V regulated chip U2, a second end of the first capacitor C1, a second end of the fourth capacitor C4, a second end of the seventh capacitor C7, a second end of the fifth capacitor C5, an ADJ pin of the first 3.3V regulated chip U3, a second end of the second capacitor C2 and a second end of the sixth capacitor C6 are connected in parallel and then grounded to GND _ D;
a pin 1 of the second connector J1 is connected with a VCC power supply, and a pin 2 of the second connector J1 is grounded GND;
a first 0 Ω resistor R0_1 is connected in series between the ground GND and the ground GND _ D, and a second 0 Ω resistor R0_2 is connected in series between the ground GND and the ground GND _ a.
The first 0 Ω resistor R0_1 and the second 0 Ω resistor R0_2 are both 0 Ω resistors.
The ground GND, the ground GND _ D and the ground GND _ A are sequentially the power ground, the digital ground and the analog ground. In the hardware circuit of the voltage stabilizing circuit, the ground is composed of the power ground, the digital ground and the analog ground, wherein a 0 omega resistor is connected between the power ground and the analog ground and between the power ground and the digital ground to isolate the digital ground from the analog ground, so that the loop current is limited and the noise is suppressed. In addition, in the hardware circuit of the voltage stabilizing circuit, a 0 omega resistor is not connected between a digital ground and an analog ground in a bridging mode.
In addition, in the present embodiment: the ground connected to the second end of the PT100 PT thermistor is analog ground (i.e. corresponding to ground GND _ a), as shown in fig. 2; each "ground" involved in the signal amplification circuit 102 is an analog ground (i.e., each corresponding to "ground GND _ a"), as shown in fig. 3; the "ground" referred to in the schematic circuit diagram of the ZigBee module 103 is all digital ground (i.e. all corresponding to "ground GND _ D"), as shown in fig. 4. Specifically, in the hardware design circuit of the present apparatus 100, a 0 Ω resistor is connected between the power ground and the analog ground and between the power ground and the digital ground to perform digital isolation from the analog ground (no 0 Ω resistor is connected between the digital ground and the analog ground).
In the present embodiment, the temperature detection module 101 and the signal amplification circuit 102 belong to analog circuits, the STM32F103C8T6 minimum system and the ZigBee module 103 circuit belong to digital circuits, and the present apparatus 100 helps to reduce the mutual influence between the analog circuits and the digital circuits in a manner that the digital ground (ground GND _ D) and the analog ground (ground GND _ a) are separated.
(V) control Module 104
The control module 104 is used for controlling the device, and includes a function of converting the voltage signal (analog signal) output by the signal amplifying circuit 102 into a corresponding temperature value, and a function of transmitting the converted temperature value to an upper computer through the ZigBee module.
In particular, those skilled in the art can select the related art to implement the control module 104 according to actual situations.
In this embodiment, the control module employs an STM32F103C8T6 processor.
Optionally, as an embodiment of the present invention, the control module 104 may adopt a timer to time, and collect and upload temperature data once every preset time length.
Specifically, in order to ensure the sensitivity of real-time temperature monitoring and greatly reduce the power consumption and resource occupancy rate of the device, the control module may use a general timer to time, and acquire and upload temperature data every 2 seconds.
The STM32F103C8T6 minimum system module adopts a +3.3V power supply mode. The STM32F103C8T6 has three general timers, which are simple to apply and high in timing accuracy, and in the present embodiment, the TIM3 of the three general timers is used as timing.
In addition, the processor of model STM32F103C8T6 has two ADC interfaces with 12-bit precision, and adopts a successive approximation type operation structure. The ADC of the processor has 16 channels.
In this embodiment, the number of the PT100 platinum thermal resistors is one, the output end of the signal amplifying circuit is connected to one signal input channel of the ADC of the STM32F103C8T6 processor, and the ADC of the STM32F103C8T6 processor scans only the relevant channel connected to the output end of the signal amplifying circuit when performing analog voltage conversion on the input signal.
In this embodiment, the ADC samples the input voltage in a plurality of sampling periods, the size of the sampling period is determined by the ADC _ CLK register, and the number of sampling periods can be changed by configuring the SMP [2:0] bits in the ADC _ SMPR1 and ADC _ SMPR2 registers through software programming. The ADC conversion time is calculated by
TCONV＝TS+12.5T，
Wherein, T in the formulaSRepresenting the sampling time and T the period.
In this example, ADCCLK is 14MHz, the sample time is 1.5 cycles, so TCONV＝1.5+12.5＝14T＝1μs。
In this embodiment, the work flow of STM32F103C8T6 may be (or may be adjusted by those skilled in the art according to actual needs in the art):
(1) after the device is powered on, a control module (STM32F103C8T6) is initialized, for example, modules such as a system clock, a GPIO, an ADC, a UART, a timer and the like are initialized, and pins, clocks, input and output modes and the like of each module are configured;
(2) after initialization of each module is completed, enabling the ADC module of each module to carry out one-time self-calibration;
(3) after the ADC self-calibration is finished, enabling the UART module of the ADC to send a preset character to the ZigBee module to serve as a handshake signal;
(4) after the handshake signal is sent out, a preset time length is delayed, a timer (TIM3) is enabled, an LED which represents the start of work is lightened, and the program enters a main cycle;
(5) the timer starts to time, the ADC module performs temperature acquisition once every 2 seconds, and the temperature is transmitted to the ZigBee module through the UART module after data processing;
(6) and (4) detecting whether the UART receives a stop signal, stopping the main loop if the UART receives the stop signal, and executing the step shown in (5) if the UART does not receive the stop signal.
The utility model also provides a vibrating screen motor bearing temperature detection system, as shown in fig. 6, the vibrating screen motor bearing temperature detection system comprises an upper computer 200 and the device 100 as described above; the upper computer 200 and the device 100 are matched for use.
Optionally, as an embodiment of the present invention, the upper computer 200 adopts a LABVIEW serial port data acquisition upper computer system (adopts LABVIEW programming), and acquires temperature information transmitted from the ZigBee module through an NI-visa (virtual Instrument architecture) interface.
The upper computer 200 may be a PC of a monitoring center.
The same and similar parts in the various embodiments in this specification may be referred to each other.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a shale shaker motor bearing temperature-detecting device which characterized in that includes:
the temperature detection module adopts a three-wire method bridge type measuring circuit with a PT100 platinum thermal resistor and is used for detecting the temperature of a bearing of a vibrating screen motor;
the signal amplification circuit is used for amplifying the voltage signal output by the temperature detection module;
the ZigBee module is used for data transmission of the device;
the control module is used for controlling the device, and comprises a temperature conversion module, a temperature acquisition module and a control module, wherein the temperature conversion module is used for converting a voltage signal output by the signal amplification circuit into a corresponding temperature value and transmitting the converted temperature value to an upper computer through the ZigBee module;
the power supply circuit is used for supplying power to the temperature detection device of the bearing of the motor of the local vibrating screen;
the power supply circuit comprises a lithium battery and a voltage stabilizing circuit, and the voltage stabilizing circuit comprises a second connector J1, a first voltage stabilizing module and a second voltage stabilizing module;
the first voltage stabilization module comprises a first 5V voltage stabilization chip U1, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and a twelfth capacitor C12, wherein: the first end of the eighth capacitor C8 is connected IN parallel with the first end of the ninth capacitor C9, then is connected with a VCC power supply, and is connected with an IN pin of the first 5V voltage-stabilizing chip U1; the first end of the tenth capacitor C10 is connected in parallel with the first end of the twelfth capacitor C12, then is connected with the 5V power output end, and is connected with the OUT pin of the first 5V voltage-stabilizing chip U1; the second end of the eighth capacitor C8, the second end of the ninth capacitor C9, the second end of the tenth capacitor C10, the second end of the twelfth capacitor C12 and the ADJ pin of the first 5V regulator chip U1 are connected in parallel and then grounded to GND _ a;
the second voltage stabilizing module comprises an eleventh capacitor C11, a third capacitor C3, a second 5V voltage stabilizing chip U2 and a 3.3V voltage stabilizing chip, wherein: the first end of the eleventh capacitor C11 is connected IN parallel with the first end of the third capacitor C3, then is connected with a VCC power supply, and is connected with an IN pin of a second 5V voltage-stabilizing chip U2; the OUT pin of the second 5V voltage-stabilizing chip U2 is respectively connected with the first end of the first capacitor C1, the first end of the fourth capacitor C4, the first end of the seventh capacitor C7, the first end of the fifth capacitor C5 and the IN pin of the 3.3V voltage-stabilizing chip; the OUT pin of the 3.3V voltage-stabilizing chip is respectively connected with the VCC _3.3 power supply output end, the first end of the second capacitor C2 and the first end of the sixth capacitor C6; a second end of an eleventh capacitor C11, a second end of a third capacitor C3, an ADJ pin of a second 5V voltage stabilizing chip U2, a second end of a first capacitor C1, a second end of a fourth capacitor C4, a second end of a seventh capacitor C7, a second end of a fifth capacitor C5, an ADJ pin of a 3.3V voltage stabilizing chip, a second end of a second capacitor C2 and a second end of a sixth capacitor C6 are connected in parallel and then grounded GND _ D;
a pin 1 of the second connector J1 is connected with a VCC power supply, and a pin 2 of the second connector J1 is grounded GND;
a first 0 Ω resistor R0_1 is connected in series between the ground GND and the ground GND _ D, and a second 0 Ω resistor R0_2 is connected in series between the ground GND and the ground GND _ a.
2. The device for detecting the temperature of the bearing of the motor of the vibrating screen as claimed in claim 1, wherein the three-wire method bridge type measuring circuit comprises a first output wire OUT +, a second output wire OUT-, a first resistor R1, a second resistor R2, a seventh resistor R7 and the PT100 platinum thermistor, wherein a first end of the PT100 platinum thermistor is connected with a 5V power supply through the first resistor R1, a second end of the PT100 platinum thermistor is connected with the 5V power supply after passing through the seventh resistor R7 and the second resistor R2 in sequence, and a second end of the PT100 platinum thermistor is grounded; the first output line OUT + is led OUT from a connecting line between the first end of the PT100 platinum thermal resistor and the first resistor R1, and the second output line OUT-is led OUT from a connecting line between the seventh resistor R7 and the second resistor R2;
the signal amplification circuit comprises an LM358 operational amplifier, a sixteenth resistor R16, an eighteenth resistor R18 and a first connector, wherein: the first end of the sixteenth resistor R16 is connected with the output end of the second output line OUT-, and the first end of the eighteenth resistor R18 is connected with the output end of the first output line OUT +; a second end of the sixteenth resistor R16 is respectively connected with a first end of the fifteenth resistor R15 and the IN 1-pin of the LM358 operational amplifier; a second end of the fifteenth resistor R15 is respectively connected to the first end of the thirteenth resistor R13 and the OUT1 pin of the LM358 operational amplifier; a second end of the thirteenth resistor R13 is respectively connected to the cathode of the first diode D1, the first end of the fourteenth capacitor C14, and the 1 st pin of the first connector; the anode of the first diode D1 is connected in parallel with the second end of the fourteenth capacitor C14 and then grounded; the 2 nd pin of the first connector is grounded; the VCC pin of the LM358 operational amplifier is connected with the 5V power supply; the GND pin of the LM358 operational amplifier is grounded; the second end of the eighteenth resistor R18 is respectively connected with the first end of the nineteenth resistor R19 and the IN1+ pin of the LM358 operational amplifier; a second terminal of the nineteenth resistor R19 is connected to ground.
3. The vibrating screen motor bearing temperature detection device of claim 1, wherein the control module uses a timer to time, and collects and uploads temperature data once every preset time interval.
4. The vibrating screen motor bearing temperature detection device of claim 3, wherein the control module employs an STM32F103C8T6 processor, the number of PT100 platinum thermistors is one, an output end of the signal amplification circuit is connected to a signal input channel of an ADC of the STM32F103C8T6 processor, and the ADC of the STM32F103C8T6 processor scans only a channel connected with an output end of the signal amplification circuit when performing analog voltage conversion on an input signal.
5. A vibrating screen motor bearing temperature detection system is characterized by comprising an upper computer and a vibrating screen motor bearing temperature detection device according to any one of claims 1 to 4; the upper computer and the vibrating screen motor bearing temperature detection device are matched for use.
6. A vibrating screen motor bearing temperature detection system as recited in claim 5,
the upper computer adopts an LABVIEW serial port data acquisition upper computer system, and temperature information transmitted by the ZigBee module is acquired through an NI-VISA interface.
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| CN202022810948.7U CN214702550U (en) | 2020-11-27 | 2020-11-27 | Vibrating screen motor bearing temperature detection device and system |
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| CN202022810948.7U CN214702550U (en) | 2020-11-27 | 2020-11-27 | Vibrating screen motor bearing temperature detection device and system |
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