CN214666995U - Temperature and vibration integrated transmitter circuit - Google Patents
Temperature and vibration integrated transmitter circuit Download PDFInfo
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- CN214666995U CN214666995U CN202121085189.0U CN202121085189U CN214666995U CN 214666995 U CN214666995 U CN 214666995U CN 202121085189 U CN202121085189 U CN 202121085189U CN 214666995 U CN214666995 U CN 214666995U
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Abstract
The utility model discloses an integrative changer circuit of temperature shake relates to the changer field. Most of the existing transmitters only acquire single temperature and vibration signal quantities, and multivariable transmitters have more input and output cables, so that the use cost is increased invisibly. The utility model discloses a MEMS acceleration chip U3, temperature sensor chip U2, microprocessor MCU, voltage current conversion circuit and power supply circuit, power supply circuit is connected with MEMS acceleration chip U3, temperature sensor chip U2, microprocessor MCU respectively, MEMS acceleration chip U3 and temperature sensor chip U2 are connected with microprocessor respectively, microprocessor is connected to voltage current conversion circuit, voltage current conversion circuit is connected to the equipment end through two-wire system cable. The temperature and vibration signal acquisition and processing can be conveniently and simultaneously realized, and the integrated circuit has the advantages of simple structure, small operand, high response speed and effective cost reduction.
Description
Technical Field
The utility model relates to a changer field especially relates to an integrative changer circuit shakes in temperature.
Background
Detection devices such as a vibration transmitter, a temperature sensor and a current sensor are widely applied to mechanical equipment such as a steam turbine, a water turbine, a fan, a motor, a pump and a gear box, the transmitter can acquire signals such as temperature and vibration intensity, the sensor has the characteristics of no need of extra power supply, strong anti-interference capability and the like, and the sensor is extremely widely applied to the field of signal acquisition of industrial mechanical equipment. The existing transmitter is single signal acquisition equipment, the number of multivariable transmitter input and output cables is large, and the use cost is increased invisibly.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model and the technical task who provides are perfect and improve prior art scheme, provide a temperature and shake integrative changer circuit to realize gathering the semaphore and the reduce cost of temperature and vibration simultaneously as the purpose. Therefore, the utility model adopts the following technical scheme.
The utility model provides an integrative changer circuit of temperature and vibration, is including MEMS acceleration chip U3 that is used for gathering vibration signal, the temperature sensor chip U2 that is used for gathering temperature signal, be used for carrying out the microprocessor MCU that handles vibration and temperature signal, a power supply circuit for realizing the voltage current conversion circuit of voltage current signal transform and be used for the power supply, power supply circuit's output be connected to MEMS acceleration chip U3, temperature sensor chip U2 and microprocessor MCU's power input respectively, MEMS acceleration chip U3 and temperature sensor chip U2's signal output part be connected to microprocessor MCU's respective signal input part respectively, microprocessor MCU's signal output port be connected to voltage current conversion circuit, voltage current conversion circuit is connected to the equipment end through the cable. The temperature and vibration signal acquisition and processing can be conveniently and simultaneously realized, compared with the traditional transmitter with single semaphore, a plurality of transmitters are needed when a plurality of semaphores are processed, and the integrated circuit has the advantages of simple structure, small operand, high response speed and effective cost reduction.
As a preferable technical means: the output end of the voltage-current conversion circuit is connected to the two-wire cable. The two-wire cable uses less cable strands and has lower cost.
As a preferable technical means: the power supply circuit comprises a power supply chip U1, a power supply input end of the power supply chip U1 is connected to a power supply output end VCC of a voltage-current change circuit, an input end of the power supply chip U1 is provided with a filter capacitor C1, the upper end of the filter capacitor C1 is connected with VCC and IN of the power supply chip U1, the lower end of the filter capacitor C1 is connected with EN and ground, an output end of the power supply chip U1 is provided with a feedback circuit, the feedback circuit comprises a voltage division resistor R1, a voltage division resistor R2 and a filter capacitor C2, the voltage division resistor R1 is connected with the voltage division resistor R2 IN series, a series body of the R1 and the R2 is connected with the filter capacitor C2 IN parallel, an output end OUT of the power supply chip U1 is connected with the upper end of the voltage division resistor R1, a feedback voltage signal end FB of the power supply chip U1 is connected between the voltage division resistor R1 and the R2, and the lower end of the R2 is grounded. The voltage conversion can be effectively realized, the filtering and voltage stabilization can be realized, and the stable and reliable power supply can be realized.
As a preferable technical means: the voltage of the input end of the power chip U1 is DC5V, the voltage of the output end OUT of the power chip U1 is DC3.3V, and DC3.3V can effectively supply power to each chip; the feedback voltage signal terminal FB of the power chip U1 is 0.6V, the power output terminal voltage of the voltage-current conversion circuit is DC5V, and the output current is 4-20mA nonpolar current signals with different ranges. The current signals with different ranges represent temperature and vibration values, the nonpolar current signals do not divide a power supply end and a signal end, the temperature and vibration signals are sent to the voltage-current conversion circuit in a time-sharing mode according to different voltage ranges, the transmission of signals with different signal quantities of temperature and vibration on the two-wire cable can be conveniently realized, and the 4-20mA signals can effectively reduce electromagnetic interference and attenuation in the transmission process.
As a preferable technical means: filter capacitors C3, C4 and C5 are connected between the temperature sensor chip U2 and the MEMS acceleration chip U3 and between two end pins of the power input end of the microprocessor MCU respectively, and the filter capacitors C3, C4 and C5 are grounded. The power supply is more stable and reliable.
As a preferable technical means: the temperature sensor chip U2 and the MEMS acceleration chip U3 are connected with an analog interface or a digital communication interface of the microprocessor MCU, and the microprocessor samples the analog interface through the internal ADC module or reads current temperature and acceleration instantaneous data through the digital communication interface.
As a preferable technical means: and a DAC module is arranged in the microprocessor MCU, and the output port of the DAC is connected to the input end of the voltage-current conversion circuit, so that digital signals can be effectively converted into analog signals and output to the voltage-current conversion circuit.
As a preferable technical means: the voltage-current conversion circuit comprises a resistor R7, a voltage-current conversion chip U4, a triode Q1, a diode D1 and a rectification circuit, wherein a signal output port of the microprocessor MCU is connected with the resistor R7, the resistor R7 is connected to the input end of the voltage-current conversion chip U4, the triode Q1 is arranged at the output end of the voltage-current conversion chip U4, a capacitor C6 and a diode D1 are connected between two end pins of the output end of the voltage-current conversion chip U4 in parallel, the two end pins of the output end of the voltage-current conversion chip U4 are connected to the rectification circuit, and the output end of the rectification circuit is connected with a standard interface of a two-wire cable to be connected with the two-wire cable. The circuit can effectively realize nonpolar current signals with output currents of 4-20mA and different measuring ranges, the circuit can be directly connected with the two-wire cable through a standard interface of the two-wire cable, the triode Q1 is used for multiplying power amplification of current adjustment, and the diode D1 has an anti-reverse connection function.
As a preferable technical means: the rectifier circuit is a bridge rectifier circuit and comprises diodes D2, D3, D4 and D5; diodes D2, D3 form a series; the diodes D4 and D5 form another series connection body, the diodes of the two series connection bodies are arranged in the same direction, the two series connection bodies are connected in parallel, and two end pins of the output end of the voltage-current conversion chip U4 are respectively connected between the D2 and the D3 and between the D4 and the D5. The D2, D3, D4 and D5 diodes form a bridge rectifier circuit to realize rectification output, reduce equipment damage caused by reverse connection of user wiring, convert output signals with polarity into output signals without polarity through rectification output, and output power terminals and signal terminals without separation.
The microprocessor MCU sends the processed temperature and vibration signals to the voltage-current conversion circuit in a time-sharing manner according to different voltage ranges, and the voltage-current conversion circuit generates 4-20mA current signals with corresponding ranges and outputs the current signals to the equipment end through a two-wire system.
Has the advantages that: the temperature and vibration signal acquisition, processing and output are conveniently and simultaneously realized, compared with the traditional transmitter with single semaphore, a plurality of transmitters are needed when a plurality of semaphores are processed, the cost of an integrated circuit can be effectively reduced, the acquired temperature and vibration voltage signals are converted into analog current signals, two-wire system 4-20mA line output is realized, the wiring of the 4-20mA line is not divided into a power supply end and a current signal end, meanwhile, the electromagnetic interference and attenuation can be effectively reduced in the transmission process of the 4-20mA signals, and the circuit is simple in structure, low in cost, small in operand and high in response speed.
Drawings
Fig. 1 is a connection diagram of the power circuit, the MEMS acceleration chip, the temperature sensor chip, and the microprocessor according to the present invention.
Fig. 2 is a circuit diagram of the microprocessor and the voltage-current converter of the present invention.
In the figure: 1-a power supply circuit; 2-voltage current conversion circuit.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
Example one
As shown in fig. 1-2, a temperature and vibration integrated transmitter circuit includes an MEMS acceleration chip U3 for acquiring vibration signals, a temperature sensor chip U2 for acquiring temperature signals, a microprocessor MCU for processing vibration and temperature signals, a voltage-current conversion circuit 2 for implementing voltage-current signal conversion, and a power circuit 1 for supplying power, wherein an output terminal of the power circuit 1 is connected to power input terminals of the MEMS acceleration chip U3, the temperature sensor chip U2, and the microprocessor MCU, signal output terminals of the MEMS acceleration chip U3 and the temperature sensor chip U2 are connected to respective signal input terminals of the microprocessor MCU, a signal output terminal of the microprocessor MCU is connected to the voltage-current conversion circuit 2, and the voltage-current conversion circuit 2 is connected to a device terminal through a cable.
To reduce the cost, the output of the voltage-to-current converter circuit 2 is connected to a two-wire cable. The two-wire cable uses less cable strands and has lower cost.
IN order to realize stable and reliable power supply, the power supply circuit 1 comprises a power supply chip U1, a power supply input end of the power supply chip U1 is connected to a power supply output end VCC of a voltage-current change circuit, an input end of the power supply chip U1 is provided with a filter capacitor C1, the upper end of the filter capacitor C1 is connected with VCC and IN of the power supply chip U1, the lower end of the filter capacitor C1 is connected with EN and ground, an output end of the power supply chip U1 is provided with a feedback circuit, the feedback circuit comprises voltage division resistors R1, R2 and a filter capacitor C2, the voltage division resistors R1 and R2 are connected IN series, a series body of R1 and R2 is connected with the filter capacitor C2 IN parallel, an output end OUT of the power supply chip U1 is connected with the upper end of the voltage division resistor R1, a feedback voltage signal FB end of the power supply chip U1 is connected between the voltage division resistors R1 and R2, and the lower end of the R2 is grounded. The voltage conversion can be effectively realized, the filtering and voltage stabilization can be realized, and the stable and reliable power supply can be realized.
In order to reduce the supply voltage of each chip, the utility model discloses a temperature sensor chip U2, MEMS acceleration chip U3 and microprocessor MCU's supply voltage is DC3.3V, provides by power chip U1. The voltage of the input end of the power chip U1 is DC5V, and the voltage of the output end OUT of the power chip U1 is DC3.3V, so that power can be effectively supplied to each chip.
The voltage-current conversion circuit 2 outputs nonpolar current signals with current of 4-20mA in different ranges, the current signals with different ranges represent temperature and vibration values, the nonpolar current signals do not divide a power supply end and a signal end, the temperature and vibration signals are sent to the voltage-current conversion circuit 2 in different voltage ranges in a time-sharing mode, transmission of signals with temperature and vibration of two different signal quantities on the two-wire cable can be conveniently achieved, and electromagnetic interference and attenuation can be effectively reduced when the 4-20mA signals are transmitted.
In order to make the power supply more stable and reliable, filter capacitors C3, C4 and C5 are respectively connected between the temperature sensor chip U2, the MEMS acceleration chip U3 and two end pins of the power supply input end of the microprocessor MCU, and the filter capacitors C3, C4 and C5 are grounded. The power supply is more stable and reliable.
In order to read out the current temperature and acceleration instantaneous data, the temperature sensor chip U2 and the MEMS acceleration chip U3 are connected with an analog interface of the microprocessor MCU, and the analog interface is connected with an ADC module arranged in the microprocessor MCU. And sampling the analog interface through the ADC module, and reading out the current temperature and acceleration instantaneous data.
In order to convert the digital signal into an analog signal, a DAC module is arranged in the microprocessor MCU, so that the digital signal can be effectively converted into the analog signal and output to the voltage-current conversion circuit 2.
In order to realize nonpolar current signals with different ranges of 4-20mA output current, the voltage-current conversion circuit 2 comprises a resistor R7, a voltage-current conversion chip U4, a triode Q1, a diode D1 and a rectification circuit, a signal output port of the microprocessor MCU is connected with the resistor R7, the resistor R7 is connected to the input end of the voltage-current conversion chip U4, the triode Q1 is arranged at the output end of the voltage-current conversion chip U4, a capacitor C6 and a diode D1 are connected between two end pins of the output end of the voltage-current conversion chip U4 in parallel, the two end pins of the output end of the voltage-current conversion chip U4 are connected to the rectification circuit, and the output end of the rectification circuit is connected with a standard interface of a two-wire cable to connect with the two-wire cable. The circuit can effectively realize nonpolar current signals with output currents of 4-20mA and different measuring ranges, the circuit can be directly connected with the two-wire cable through a standard interface of the two-wire cable, the triode Q1 is used for multiplying power amplification of current adjustment, and the diode D1 has an anti-reverse connection function.
In order to realize rectified output, the rectifying circuit comprises diodes D2 and D3 series bodies and D4 and D5 series bodies, the diodes of the two series bodies are arranged in the same direction, the two series bodies are connected in parallel, and two end pins of the output end of the voltage-current conversion chip U4 are respectively connected between the diodes D2 and D3 and between the diodes D4 and D5. The D2, D3, D4 and D5 diodes form a bridge rectifier circuit to realize rectification output, reduce equipment damage caused by reverse connection of user wiring, convert output signals with polarity into output signals without polarity through rectification output, and output power terminals and signal terminals without separation.
When the circuit works, the MEMS acceleration chip U3 samples and stores acceleration signals at a certain sampling rate, frequency domain spectrums of temperature and the acceleration signals are obtained through an FFT algorithm, a low-frequency signal part lower than a certain frequency is deleted to filter the influence of direct current offset and gravity acceleration of the MEMS acceleration chip U3, and the rest part divides angular velocity to complete frequency domain integration to obtain frequency domain velocity signals. Because frequency spectrum leakage exists in the FFT process, 5Hz which is half of the lower limit of the range of the common economical vibration transmitter is selected as the low-frequency cut-off frequency, the obtained frequency domain speed signal is calculated, the time domain speed signal can be obtained after FFT inverse operation is carried out, and the effective value of the speed is obtained after the time domain speed signal is subjected to root mean square operation. The microprocessor MCU sends the processed temperature and vibration signals to the voltage-current conversion circuit 2 in a time-sharing manner according to different voltage ranges, and the effective value of the voltage is 0.4-2V. The voltage-current conversion chip U4 provides a +5V power supply; the resistor R7 is a current sampling resistor with the resistance value of 10k, so that the current flowing through the resistor R7 is ensured to be 0.04-0.2 mA; the voltage-current conversion chip U4 is a current output chip with gain of 100 times, the output current is 4-20mA according to the input current, and current signals with different ranges represent temperature and vibration values and are output to the equipment end through a two-wire cable.
The circuit can conveniently and simultaneously realize the collection and the processing of temperature and vibration signals, and compared with the traditional transmitter with single semaphore, the circuit needs to adopt a plurality of transmitters when processing a plurality of semaphores, and the integrated circuit has the advantages of simple structure, small operand, high response speed and effective cost reduction.
Example two
Unlike the above example, the temperature sensor chip U2 and the MEMS acceleration chip U3 are connected with the digital communication interface of the microprocessor MCU. The current temperature and acceleration instantaneous data are read out through a digital communication interface.
The above fig. 1-2 show a temperature and vibration integrated transmitter circuit, which is a specific embodiment of the present invention, and embodies the substantial features and advantages of the present invention, and can modify the same in terms of shape, structure, etc. according to the practical needs of use, all within the scope of protection of the present solution.
Claims (9)
1. The utility model provides an integrative changer circuit shakes which characterized in that: including MEMS acceleration chip U3 for gathering vibration signal, the temperature sensor chip U2 for gathering temperature signal, the microprocessor MCU who is used for handling vibration and temperature signal, the power supply circuit (1) that is used for realizing voltage current signal conversion's voltage current conversion circuit (2) and is used for the power supply, the output of power supply circuit (1) be connected to MEMS acceleration chip U3 respectively, temperature sensor chip U2 and microprocessor MCU's power input end, MEMS acceleration chip U3 and temperature sensor chip U2's signal output part be connected to microprocessor MCU's respective signal input part respectively, microprocessor MCU's signal output port be connected to voltage current conversion circuit (2), voltage current conversion circuit (2) are connected to the equipment end through the cable.
2. The temperature and vibration integrated transmitter circuit of claim 1, wherein: the VCC end of the power supply circuit (1) is connected to the VCC end of the power supply output end of the voltage-current conversion circuit (2), and the output end of the voltage-current conversion circuit (2) is connected to the two-wire cable.
3. The temperature and vibration integrated transmitter circuit of claim 2, wherein: the power supply circuit (1) comprises a power supply chip U1, a filter capacitor C1 is arranged at the input end of the power supply chip U1, VCC and IN of the power supply chip U1 are connected to the upper end of the filter capacitor C1, EN and ground are connected to the lower end of the filter capacitor C1, a feedback circuit is arranged at the output end of the power supply chip U1, the feedback circuit comprises voltage dividing resistors R1 and R2 and a filter capacitor C2, the voltage dividing resistors R1 and R2 are connected IN series, the series connection body of the R1 and the R2 is connected with the filter capacitor C2 IN parallel, the output end OUT of the power supply chip U1 is connected with the upper end of the voltage dividing resistor R1, a feedback voltage signal end FB of the power supply chip U1 is connected between the voltage dividing resistors R1 and R2, and the lower end of the R2 is grounded.
4. The temperature and vibration integrated transmitter circuit of claim 3, wherein: the voltage of the input end of the power chip U1 is DC5V, the voltage of the output end OUT of the power chip U1 is DC3.3V, the feedback voltage signal end FB of the power chip U1 is 0.6V, the voltage of the power output end of the voltage-current conversion circuit (2) is DC5V, and the output two-wire system signal is a 4-20mA nonpolar current signal.
5. The temperature and vibration integrated transmitter circuit of claim 1, wherein: filter capacitors C3, C4 and C5 are connected between the temperature sensor chip U2 and the MEMS acceleration chip U3 and between two end pins of the power input end of the microprocessor MCU respectively, and the filter capacitors C3, C4 and C5 are grounded.
6. The temperature and vibration integrated transmitter circuit of claim 1, wherein: the temperature sensor chip U2 and the MEMS acceleration chip U3 are connected with an analog interface or a digital communication interface of the microprocessor MCU, and the microprocessor samples the analog interface through the internal ADC module or reads current temperature and acceleration instantaneous data through the digital communication interface.
7. The temperature and vibration integrated transmitter circuit of claim 1, wherein: and a DAC module is arranged in the microprocessor MCU, and the output port of the DAC is connected to the input end of the voltage-current conversion circuit (2).
8. The temperature and vibration integrated transmitter circuit of claim 2, wherein: the voltage-current conversion circuit (2) comprises a resistor R7, a voltage-current conversion chip U4, a triode Q1, a diode D1 and a rectification circuit, wherein a signal output port of the microprocessor MCU is connected with the resistor R7, the resistor R7 is connected to the input end of the voltage-current conversion chip U4, the triode Q1 is arranged at the output end of the voltage-current conversion chip U4, a capacitor C6 and a diode D1 are connected between two end pins of the output end of the voltage-current conversion chip U4 in parallel, the two end pins of the output end of the voltage-current conversion chip U4 are connected to the rectification circuit, and the output end of the rectification circuit is connected with a standard interface of a two-wire cable to be connected with the two-wire cable.
9. The temperature and vibration integrated transmitter circuit of claim 8, wherein: the rectifier circuit is a bridge rectifier circuit and comprises diodes D2, D3, D4 and D5; diodes D2, D3 form a series; the diodes D4 and D5 form another series connection body, the diodes of the two series connection bodies are arranged in the same direction, the two series connection bodies are connected in parallel, and two end pins of the output end of the voltage-current conversion chip U4 are respectively connected between the D2 and the D3 and between the D4 and the D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121085189.0U CN214666995U (en) | 2021-05-20 | 2021-05-20 | Temperature and vibration integrated transmitter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121085189.0U CN214666995U (en) | 2021-05-20 | 2021-05-20 | Temperature and vibration integrated transmitter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214666995U true CN214666995U (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121085189.0U Active CN214666995U (en) | 2021-05-20 | 2021-05-20 | Temperature and vibration integrated transmitter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214666995U (en) |
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2021
- 2021-05-20 CN CN202121085189.0U patent/CN214666995U/en active Active
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Effective date of registration: 20220225 Address after: 312399 building 16, science and Technology City, 1100 Fuxing East Road, Cao'e street, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Shunyun Internet Technology Co.,Ltd. Patentee after: Wolong Electric Drive Group Co., Ltd Address before: 312300 Economic Development Zone, Shangyu District, Shaoxing City, Zhejiang Province Patentee before: WOLONG ELECTRIC GROUP Co.,Ltd. Patentee before: Wolong Electric (Shanghai) Central Research Institute Co.,Ltd. Patentee before: Zhejiang longchuang Motor Technology Innovation Co.,Ltd. |
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