CN204594614U - Digital pressure measurement mechanism on a kind of SCM Based hydropress - Google Patents
Digital pressure measurement mechanism on a kind of SCM Based hydropress Download PDFInfo
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- CN204594614U CN204594614U CN201520191704.1U CN201520191704U CN204594614U CN 204594614 U CN204594614 U CN 204594614U CN 201520191704 U CN201520191704 U CN 201520191704U CN 204594614 U CN204594614 U CN 204594614U
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Abstract
The utility model discloses the digital pressure measurement mechanism on a kind of SCM Based hydropress, it relates to technical field of automation in industry.It comprises signal input unit, A/D converting unit, single-chip microcomputer, communication chip and Power Management Unit, signal input unit comprises the pressure transducer for gathering measured pressure and the temperature sensor for Temperature displaying, signal input unit connects A/D converting unit, A/D converting unit connects single-chip microcomputer, single-chip microcomputer is connected with communication chip by UART interface, and communication chip is connected with PC with RS-232 interface converter by USB interface.The utility model is by demarcating the precision and performance that improve system to pressure drag type pressure capsule, make system have the features such as high, the simple to operate and friendly interface of low-power consumption, industry spot Treatment Analysis, measuring accuracy, antijamming capability is strong.
Description
Technical field
The utility model relates to technical field of automation in industry, be specifically related to the digital pressure measurement mechanism on a kind of SCM Based hydropress.
Background technology
Along with the development of modern science and technology, automatic measurement technology develops rapidly, and pressure survey is one of them important branch, pressure is one of important thermal parameter, various gas, the pressure survey of liquid is in productive life, industry spot, the fields such as scientific experiment have a wide range of applications, therefore, research and develop high performance digital pressure measuring system for the development promoting infotech and automatic technology, the performance of raising equipment and automatization level have immeasurable meaning, wherein piezoresistive pressure sensor is highly sensitive with it, dynamic response is good, be easy to the features such as microminiaturization, and obtain widespread use, piezoresistance coefficient due to diffuse si is the function of temperature, piezoresistive pressure sensor is made to there is zero temperature drift, this is the principal element affecting pressure-measuring system precision, based on this, design digital pressure measurement mechanism on a kind of SCM Based hydropress or necessary.
Utility model content
For the deficiency that prior art exists, the utility model object is to provide the digital pressure measurement mechanism on a kind of SCM Based hydropress, by demarcating the precision and performance that improve system to pressure drag type pressure capsule, make system have the features such as high, the simple to operate and friendly interface of low-power consumption, industry spot Treatment Analysis, measuring accuracy, antijamming capability is strong.
To achieve these goals, the utility model realizes by the following technical solutions: the digital pressure measurement mechanism on a kind of SCM Based hydropress, comprise signal input unit, A/D converting unit, single-chip microcomputer, communication chip and Power Management Unit, signal input unit comprises the pressure transducer for gathering measured pressure and the temperature sensor for Temperature displaying, signal input unit connects A/D converting unit, A/D converting unit connects single-chip microcomputer, single-chip microcomputer connects communication chip, communication chip is connected with PC by USB, Power Management Unit respectively with signal input unit, A/D converting unit, single-chip microcomputer, communication chip, USB and PC connect, the faint simulating signal that pressure type sensor exports is compensated by single-chip microcomputer after A/D converting unit inside is amplified and is converted to digital signal, single-chip microcomputer mainly carries out collection and the compensation operation of pressure and temperature signal, and the signal after compensating is exported by UART interface, the signal that single-chip microcomputer is sent by UART exports with the RS-232 signal of standard by communication chip, then RS-232 is converted to usb signal and PC carries out communication, thus make the measurement of whole device realization to hydropress pressure, described single-chip microcomputer adopts single-chip microcomputer MSP430F5310, communication chip adopts the driving chip MAX3221 meeting rs-232 standard, A/D converting unit adopts analog-to-digital conversion module AD7190, and pressure transducer adopts silicon die mould pressure transducer, and temperature sensor adopts digital temperature sensor.
As preferably, described single-chip microcomputer is connected with communication chip by UART interface, and communication chip is connected with PC with RS-232 interface converter by USB interface, and USB interface and RS-232 interface converter adopt converter CP2102.
As preferably, described A/D converting unit converts simulating signal (voltage or the form of electric current) circuit of digital signal to, and this digital signal can allow instrument, computer external interface or microprocessor be operated.
As preferably, described single-chip microcomputer completes the work such as internal control, data processing, data storage reading of measurement instrument as core CPU processor, realized the download of program code by jtag controller, realize running control and carrying out observing to scene and revise.
As preferably, the main function of described Power Management Unit is for instrumentation provides stable power supply, whole power-supply system is obtained electric power system that one has efficient Power convert rate and low noise.
The beneficial effects of the utility model: adopt software algorithm to achieve the temperature compensation of pressure transducer, improve the measuring accuracy of whole system, it is high that designed digital pressure measuring instrument has pressure measurement accuracy, and be digital communication between main frame and modular pressure, the features such as antijamming capability is strong.
(1) input end adopts piezoresistive pressure sensor, have highly sensitive, dynamic response good, be easy to the advantage such as microminiaturized;
(2) analog-to-digital conversion module adopts AD7190, in its sheet low-noise programmable gain stage can amplify simulating signal, change, filtering, have and directly can input small-signal, easily advantage convenient like this without the need to outer signal modulate circuit;
(3) Power Management Unit utilizes the efficient power conversion ratio of DC-DC and the characteristic of LDO low noise, whole power-supply system is obtained electric power system that one has efficient Power convert rate and low noise;
(4) the utility model is a set of portable, digital pressure-measuring device, has the features such as high, the simple to operate and friendly interface of low-power consumption, industry spot Treatment Analysis, measuring accuracy.
Accompanying drawing explanation
The utility model is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is communication module block diagram of the present utility model;
Fig. 3 is the connecting circuit figure of the utility model single-chip microcomputer.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
With reference to Fig. 1-3, this embodiment is by the following technical solutions: the digital pressure measurement mechanism on a kind of SCM Based hydropress, comprise signal input unit 1, A/D converting unit 2, single-chip microcomputer 3, communication chip 4 and Power Management Unit 5, signal input unit 1 comprises pressure transducer 6 and temperature sensor 7, signal input unit 1 connects A/D converting unit 2, A/D converting unit 2 connects single-chip microcomputer 3, single-chip microcomputer 3 connects communication chip 4, communication chip 4 is connected with PC by USB, Power Management Unit 5 respectively with signal input unit 1, A/D converting unit 2, single-chip microcomputer 3, communication chip 4, USB and PC connect, described single-chip microcomputer 3 adopts single-chip microcomputer MSP430F5310, communication chip 4 adopts the driving chip MAX3221 meeting rs-232 standard to carry out serial communication.
It should be noted that, described single-chip microcomputer 3 completes the internal control of measurement instrument, data processing, data store the work such as reading, the download of program code is realized by jtag controller, realize running and control and carry out observing to scene and revise, single-chip microcomputer 3 inside is integrated with JTAG module, the program editted can be directly downloaded in FLASH from PC by JTAG debugger, and then read single chip microcomputer internal information by the software on PC by jtag interface, the program that Real-Time Monitoring single-chip microcomputer runs, even can arrange breakpoint to be debugged, carry out in-circuit emulation.
It should be noted that described pressure transducer 6 adopts silicon die mould pressure transducer, for gathering measured pressure, signal importation is its power supply with constant pressure source; Temperature sensor 7 adopts digital temperature sensor, and for temperature acquisition, and the compensation of temperature is carried out in the calculating passing to single-chip microcomputer participation whether about pressure.
It should be noted that, described A/D converting unit 2 adopts analog-to-digital conversion module AD7190, simulating signal is converted to the circuit of digital signal by A/D converting unit 2, this digital signal can allow instrument, computer external interface or microprocessor is operated, this device uses a low noise full simulation front end being applicable to high-accuracy measurement application, a built-in low noise, 24 Sigma-delta ADC's, in sheet, low-noise programmable gain stage can be amplified simulating signal, conversion, filtering, also just mean and directly can input small-signal, without the need to outer signal modulate circuit.
In addition, the main function of described Power Management Unit 5 is for instrumentation provides stable power supply, Power Management Design is the voltage first being obtained 6V by DC-DC conversion chip, and then by LDO conversion chip, obtain required+3.3V digital power system and+5V simulation power supply, utilize the efficient power conversion ratio of DC-DC and the characteristic of LDO low noise, whole power-supply system is obtained electric power system that one has efficient Power convert rate and low noise.
This embodiment adopts USB interface and RS-232 interface converter 8 to design, USB interface and RS-232 interface converter 8 adopt converter CP2102, CP2102, as the bidirectional transducer of USB interface and RS-232 interface, both can receive usb data from main frame and be converted into RS-232 information flow form and sent to peripheral hardware; Also can be converted to usb data format stream from RS-232 peripheral hardware reception data and be sent to main frame, comprising control and handshake, signal after compensation is exported by UART interface by single-chip microcomputer 3, the signal that single-chip microcomputer 3 is sent by UART exports with the RS-232 signal of standard by communication chip 4, then converts RS-232 to usb signal and PC carries out communication.
The course of work of this embodiment: after device powers on, weight is put on a hydraulic press, pressure type sensor 6 gets pressure information and the faint simulating signal exported is compensated by single-chip microcomputer 3 after A/D converting unit 2 inside is amplified and is converted to digital signal, single-chip microcomputer 3 carries out collection and the compensation operation of pressure and temperature signal, and the signal after compensating is exported by UART interface, the signal that single-chip microcomputer 3 is sent by UART exports with the RS-232 signal of standard by communication chip 4, then RS-232 is converted to usb signal and PC carries out communication, finally result is exported on PC, thus make the measurement of whole device realization to hydropress pressure.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. the digital pressure measurement mechanism on a SCM Based hydropress, it is characterized in that, comprise signal input unit (1), A/D converting unit (2), single-chip microcomputer (3), communication chip (4) and Power Management Unit (5), signal input unit (1) comprises pressure transducer (6) and temperature sensor (7), signal input unit (1) connects A/D converting unit (2), A/D converting unit (2) connects single-chip microcomputer (3), single-chip microcomputer (3) connects communication chip (4), communication chip (4) is connected with PC by USB, Power Management Unit (5) respectively with signal input unit (1), A/D converting unit (2), single-chip microcomputer (3), communication chip (4), USB and PC connect, described single-chip microcomputer (3) adopts single-chip microcomputer MSP430F5310, communication chip (4) adopts the driving chip MAX3221 meeting rs-232 standard.
2. the digital pressure measurement mechanism on a kind of SCM Based hydropress according to claim 1, it is characterized in that, described single-chip microcomputer (3) is connected with communication chip (4) by UART interface, communication chip (4) is connected with PC with RS-232 interface converter (8) by USB interface, and USB interface and RS-232 interface converter (8) adopt converter CP2102.
3. the digital pressure measurement mechanism on a kind of SCM Based hydropress according to claim 1, it is characterized in that, described pressure transducer (6) adopts silicon die mould pressure transducer, and temperature sensor (7) adopts digital temperature sensor.
4. the digital pressure measurement mechanism on a kind of SCM Based hydropress according to claim 1, is characterized in that, described A/D converting unit (2) adopts analog-to-digital conversion module AD7190.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520191704.1U CN204594614U (en) | 2015-03-31 | 2015-03-31 | Digital pressure measurement mechanism on a kind of SCM Based hydropress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520191704.1U CN204594614U (en) | 2015-03-31 | 2015-03-31 | Digital pressure measurement mechanism on a kind of SCM Based hydropress |
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| CN204594614U true CN204594614U (en) | 2015-08-26 |
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| CN201520191704.1U Expired - Fee Related CN204594614U (en) | 2015-03-31 | 2015-03-31 | Digital pressure measurement mechanism on a kind of SCM Based hydropress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491299A (en) * | 2018-12-22 | 2019-03-19 | 蚌埠学院 | A kind of super low-power consumption data collection station based on MCU |
-
2015
- 2015-03-31 CN CN201520191704.1U patent/CN204594614U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491299A (en) * | 2018-12-22 | 2019-03-19 | 蚌埠学院 | A kind of super low-power consumption data collection station based on MCU |
| CN109491299B (en) * | 2018-12-22 | 2023-10-03 | 蚌埠学院 | Ultra-low power consumption data acquisition terminal based on MCU |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160331 |