CN204903045U - Detect pressure test system - Google Patents
Detect pressure test system Download PDFInfo
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- CN204903045U CN204903045U CN201520321419.7U CN201520321419U CN204903045U CN 204903045 U CN204903045 U CN 204903045U CN 201520321419 U CN201520321419 U CN 201520321419U CN 204903045 U CN204903045 U CN 204903045U
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- pressure transducer
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- signal
- differential amplifier
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Abstract
The utility model discloses a detect pressure test system, including detecting element and sensing unit, detecting element's connecting wire is provided with two parallel bus interface that advance a network deployment, and bus interface passes through the RS485 chip and connects the singlechip, detecting element is equipped with a plurality of low temperature steady voltage chips well, the pressure sensor of singlechip and sensing unit is connected simultaneously to low temperature steady voltage chip, the sensing unit includes pressure sensor, MCU controller, DA conversion chip, difference amplifier and AD conversion chip, pressure sensor turns into analog signal through the control of MCU controller with the pressure signal who gathers to utilize difference amplifier to turn into the data signal re -entering with analog signal and return the MCU controller, the utility model discloses consequently avoid and the throw off, improve the wholeness can, use the mode of communication to go out the signal transmission who gathers, whole collection system is consuming time extremely short, in real time data collection.
Description
Technical field
The utility model relates to detected pressures test macro, specifically a kind of detected pressures test macro.
Background technology
Pressure transducer is a kind of sensor the most conventional in industrial practice, is widely used in the industry-by-industries such as shipping vehicle transport, industrial automation, production and process automation.But in chill car field, the sensor adopted is all independent installation, and power consumption is larger.
Utility model content
The purpose of this utility model is to provide one avoid therefore and produce error, and improve overall performance, acquisition system is consuming time short, the detected pressures test macro of real-time data collection, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of detected pressures test macro, comprises detecting unit and sensing unit; The connecting line of described detecting unit is provided with the bus interface of two parallel one-in-and-one-out networkings, and bus interface connects single-chip microcomputer by RS485 chip, and the model of single-chip microcomputer is MSP430G2553; Described detecting unit is provided with well multiple low temperature voltage stabilizing chip, and the model of low temperature voltage stabilizing chip is respectively LM2940_L55B, LM2940_L53B and LM117H/883 tri-kinds; Low temperature voltage stabilizing chip connects the pressure transducer of single-chip microcomputer and sensing unit simultaneously; Described sensing unit comprises pressure transducer, MCU controller, DA conversion chip, differential amplifier and AD conversion chip; The shell that described pressure transducer comprises substrate and is fixedly installed with substrate; Wherein, substrate and shell form pressure transducer outer enclosure structure; In pressure transducer outer enclosure structure, substrate is provided with pressure sensor chip, pressure sensor chip correspondence arranges integrated circuit (IC) chip, wherein, is electrically connected between pressure sensor chip and integrated circuit (IC) chip by the mode of metal lead wire by routing; Described surface is also provided with bleeder vent, and the longitudinal through substrate of bleeder vent, is communicated with pressure transducer inside and outside; B.B.P is provided with pad, and pressure sensor inside chip is electrically connected with low temperature voltage stabilizing chip, MCU controller by pad respectively; 84kPa-110kPa that described pressure transducer reads in data is partially converted into 16 bit digital quantity, pressure transducer is through the control of MCU controller, the pressure signal of collection is converted into simulating signal, and utilizes differential amplifier simulating signal to be converted into digital signal to return MCU controller again; Wherein, differential amplifier model is INA129 differential amplifier, and the simulating signal that DAC8571 exports is its positive input terminal, and the 3V reference voltage that REF2930 exports is its negative input end, and differential amplifier uses 10V to power.
Further: described DA conversion chip adopts 16 low-power consumption conversion chip DAC8571, supply voltage adopts 5V.
Further: described AD conversion chip adopts 16 low-power consumption conversion chip ADS1100, and use power supply is reference voltage, be input as the analog voltage that differential amplifier exports, the pressure signal of the corresponding 84kPa to 110kPa of its voltage.
Compared with prior art, the beneficial effects of the utility model are:
1, during the work of the utility model pressure transducer, exterior terminal need not arrange cavity at pressure transducer top, reduces exterior terminal thickness, adds pressure transducer and uses flexibility ratio; In assembling use procedure, the bleeder vent be arranged on substrate can avoid external air flow or light to directly act on pressure sensor chip, avoids therefore and produces error, improves overall performance;
2, the signal of the utility model pressure transducer collection is converted into simulating signal, and utilize INA129 differential amplifier, the simulating signal of 84kPa to 110kPa is amplified to 5V, then is translated into digital signal, the resolution making it measure in the scope of 84kPa to 110kPa expands; Meanwhile, detecting unit sends request instruction to sensing unit, and after sensing unit receives request instruction, use the mode of communication to be sent by the signal of collection, whole acquisition system is consuming time extremely short, can real-time data collection.
Accompanying drawing explanation
Fig. 1 is the structural representation of detected pressures test macro.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of detected pressures test macro, comprise detecting unit and sensing unit, detecting unit is that sensing unit is powered and group-net communication, and sensing unit for measuring pressure, and carries out mutual communication with detecting unit by connecting line; The connecting line of described detecting unit is provided with the bus interface of two parallel one-in-and-one-out networkings, and bus interface connects single-chip microcomputer by RS485 chip, and the model of single-chip microcomputer is MSP430G2553; Described detecting unit is provided with well multiple low temperature voltage stabilizing chip, and the model of low temperature voltage stabilizing chip is respectively LM2940_L55B, LM2940_L53B and LM117H/883 tri-kinds; Low temperature voltage stabilizing chip connects the pressure transducer of single-chip microcomputer and sensing unit simultaneously; Described sensing unit comprises pressure transducer, MCU controller, DA conversion chip, differential amplifier and AD conversion chip; The shell 2 that described pressure transducer comprises substrate 1 and is fixedly installed with substrate 1; Wherein, substrate 1 and shell 2 form pressure transducer outer enclosure structure; In pressure transducer outer enclosure structure, substrate 1 is provided with pressure sensor chip 3, pressure sensor chip 3 correspondence arranges integrated circuit (IC) chip 5, wherein, be electrically connected by the mode of metal lead wire 4 by routing between pressure sensor chip 3 and integrated circuit (IC) chip 5; Also be provided with bleeder vent 6 above described substrate 1, the longitudinal through substrate 1 of bleeder vent 6, be communicated with pressure transducer inside and outside; Bottom substrate 1, be provided with pad 7, pressure sensor inside chip is electrically connected with low temperature voltage stabilizing chip, MCU controller by pad 7 respectively; When pressure transducer works, pressure sensor chip 3 gathers external pressure to be changed and is converted into electric signal, and the signal that pressure sensor chip 3 gathers by integrated circuit (IC) chip 5 carries out rough handling and is passed to external circuit through pad 7; In use procedure, exterior terminal need not arrange cavity at pressure transducer top, reduces exterior terminal thickness, adds pressure transducer and uses flexibility ratio; In assembling use procedure, the bleeder vent 6 be arranged on substrate 1 can avoid external air flow or light to directly act on pressure sensor chip 3, avoids therefore and produces error, improves overall performance; 84kPa-110kPa that described pressure transducer reads in data is partially converted into 16 bit digital quantity, pressure transducer is through the control of MCU controller, the pressure signal of collection is converted into simulating signal, and utilizes differential amplifier simulating signal to be converted into digital signal to return MCU controller again; Wherein, differential amplifier model is INA129 differential amplifier, and the simulating signal that DAC8571 exports is its positive input terminal, and the 3V reference voltage that REF2930 exports is its negative input end, and differential amplifier uses 10V to power, and effectively amplifies the simulating signal of below 5V; In work, the signal of pressure transducer collection is converted into simulating signal, and utilizes INA129 differential amplifier, and the simulating signal of 84kPa to 110kPa is amplified to 5V, be translated into digital signal again, the resolution making it measure in the scope of 84kPa to 110kPa expands; Described DA conversion chip adopts 16 low-power consumption conversion chip DAC8571, and supply voltage adopts 5V; Described AD conversion chip adopts 16 low-power consumption conversion chip ADS1100, and use power supply is reference voltage, is input as the analog voltage that differential amplifier exports, the pressure signal of the corresponding 84kPa to 110kPa of its voltage; In work, detecting unit sends request instruction to sensing unit, and after sensing unit receives request instruction, use the mode of communication to be sent by the signal of collection, whole acquisition system is consuming time extremely short, can real-time data collection.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a detected pressures test macro, comprises detecting unit and sensing unit; It is characterized in that, the connecting line of described detecting unit is provided with the bus interface of two parallel one-in-and-one-out networkings, and bus interface connects single-chip microcomputer by RS485 chip, and the model of single-chip microcomputer is MSP430G2553; Described detecting unit is provided with well multiple low temperature voltage stabilizing chip, and the model of low temperature voltage stabilizing chip is respectively LM2940_L55B, LM2940_L53B and LM117H/883 tri-kinds; Low temperature voltage stabilizing chip connects the pressure transducer of single-chip microcomputer and sensing unit simultaneously; Described sensing unit comprises pressure transducer, MCU controller, DA conversion chip, differential amplifier and AD conversion chip; The shell (2) that described pressure transducer comprises substrate (1) and is fixedly installed with substrate (1); Wherein, substrate (1) and shell (2) form pressure transducer outer enclosure structure; Pressure sensor chip (3) is provided with in pressure transducer outer enclosure structure, on substrate (1), pressure sensor chip (3) correspondence arranges integrated circuit (IC) chip (5), wherein, be electrically connected by the mode of routing by metal lead wire (4) between pressure sensor chip (3) and integrated circuit (IC) chip (5); Described substrate (1) top is also provided with bleeder vent (6), bleeder vent (6) longitudinal through substrate (1), is communicated with pressure transducer inside and outside; Substrate (1) bottom is provided with pad (7), and pressure sensor inside chip is electrically connected with low temperature voltage stabilizing chip, MCU controller by pad (7) respectively; 84kPa-110kPa that described pressure transducer reads in data is partially converted into 16 bit digital quantity, pressure transducer is through the control of MCU controller, the pressure signal of collection is converted into simulating signal, and utilizes differential amplifier simulating signal to be converted into digital signal to return MCU controller again; Wherein, differential amplifier model is INA129 differential amplifier, and the simulating signal that DAC8571 exports is its positive input terminal, and the 3V reference voltage that REF2930 exports is its negative input end, and differential amplifier uses 10V to power.
2. detected pressures test macro according to claim 1, is characterized in that, described DA conversion chip adopts 16 low-power consumption conversion chip DAC8571, and supply voltage adopts 5V.
3. detected pressures test macro according to claim 1, it is characterized in that, described AD conversion chip adopts 16 low-power consumption conversion chip ADS1100, use power supply is reference voltage, be input as the analog voltage that differential amplifier exports, the pressure signal of the corresponding 84kPa to 110kPa of its voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321419.7U CN204903045U (en) | 2015-05-19 | 2015-05-19 | Detect pressure test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520321419.7U CN204903045U (en) | 2015-05-19 | 2015-05-19 | Detect pressure test system |
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| Publication Number | Publication Date |
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| CN204903045U true CN204903045U (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520321419.7U Expired - Fee Related CN204903045U (en) | 2015-05-19 | 2015-05-19 | Detect pressure test system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262907A (en) * | 2017-07-19 | 2017-10-20 | 上海峥集机械设备有限公司 | A kind of full servo supersonic welder |
| CN107331139A (en) * | 2017-07-15 | 2017-11-07 | 潍坊弗莱瑞电子科技有限公司 | A kind of intelligent wireless detection sensor |
| CN109164271A (en) * | 2018-09-04 | 2019-01-08 | 南京英格玛仪器技术有限公司 | A kind of integrated-type air velocity transducer and manufacturing method |
| CN110261013A (en) * | 2019-06-26 | 2019-09-20 | 青岛航天半导体研究所有限公司 | The pressure sensor and assemble method of output voltage signal |
-
2015
- 2015-05-19 CN CN201520321419.7U patent/CN204903045U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331139A (en) * | 2017-07-15 | 2017-11-07 | 潍坊弗莱瑞电子科技有限公司 | A kind of intelligent wireless detection sensor |
| CN107262907A (en) * | 2017-07-19 | 2017-10-20 | 上海峥集机械设备有限公司 | A kind of full servo supersonic welder |
| CN109164271A (en) * | 2018-09-04 | 2019-01-08 | 南京英格玛仪器技术有限公司 | A kind of integrated-type air velocity transducer and manufacturing method |
| CN109164271B (en) * | 2018-09-04 | 2024-02-13 | 南京英格玛仪器技术有限公司 | Integrated wind speed sensor and manufacturing method |
| CN110261013A (en) * | 2019-06-26 | 2019-09-20 | 青岛航天半导体研究所有限公司 | The pressure sensor and assemble method of output voltage signal |
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| 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 |
Granted publication date: 20151223 Termination date: 20160519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |