CN204389002U - A kind of instrument high-speed AD sampling module - Google Patents
A kind of instrument high-speed AD sampling module Download PDFInfo
- Publication number
- CN204389002U CN204389002U CN201520059988.9U CN201520059988U CN204389002U CN 204389002 U CN204389002 U CN 204389002U CN 201520059988 U CN201520059988 U CN 201520059988U CN 204389002 U CN204389002 U CN 204389002U
- Authority
- CN
- China
- Prior art keywords
- sampling module
- differential amplifier
- speed
- model
- instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a kind of instrument high-speed AD sampling module, comprise two load cells of same model, differential amplifier and AD sampling module; Described AD sampling module is consisted of classical connection ADS1271 chip and its peripheral circuit; Described two load cells are connected respectively to the input end of differential amplifier; Described differential amplifier output terminal is connected to AINP end and the AINN end of ADS1271 chip.Solve the sample rate existed in prior art inadequate, the problem such as low level signal amplification and squelch, instrument connects in the uptime and by algorithm, the precision of instrument is improved greatly simultaneously.By application of the present utility model, such as two weighing platform, 8 sensor 8 road Real-time Collections, rig-site utilization has lacked a lot of problem; As the accuracy of weighing, the judgement of reversing, accuracy has had very large lifting.
Description
Technical field
The utility model relates to a kind of instrument high-speed AD sampling module, belongs to instrument comprising modules technical field.
Background technology
Nowadays the toll station of China achieves weight metering charging substantially; And vehicle is when each velocity shooting is reseted standby by meter, weight can be affected; Therefore dynamic instrument sample rate is had higher requirement.Chinese Patent Application No.: 200710169783.6 disclose the Fare Collection System of weighing for vehicular traffic in a kind of charge station; Being provided with a main travel direction can for the track of vehicle pass-through; Weighing platform selected by this scheme should be laid along track, and the side of weighing platform can allow the axletree of vehicle pass through successively, measures according to garage direction; For the collection of axletree by weighing platform multiple spot bearing data; And then detect the information acquisition of each axle by weighing platform; According to above information, the speed that each axle is carried out, the calculating adding (subtracting) speed and travel direction; Based on corresponding speed, add (subtracting) speed and travel direction, the weight measurement data all to axle carry out correcting process, to calculate the overall weight of vehicle.
Technique scheme can be measured well, but its method comparison is complicated, and collection terminal precision can not be guaranteed.
Utility model content
(1) technical matters that will solve
For solving the problem, the utility model proposes a kind of instrument high-speed AD sampling module, core AD adopts TI24 position high-precision AD sampling A/D chip ADS1271, and the differential amplifier circuit that prime low level signal amplification adopts CS3002 double operational to form, performance obtains perfect lifting; Solve the sample rate existed in prior art inadequate, sampling real-time, the problem such as low level signal amplification and squelch.
(2) technical scheme
Instrument high-speed AD sampling module of the present utility model, comprises two load cells of same model, differential amplifier and AD sampling module; Described AD sampling module is consisted of classical connection ADS1271 chip and its peripheral circuit; Described two load cells are connected respectively to the input end of differential amplifier; Described differential amplifier output terminal is connected to AINP end and the AINN end of ADS1271 chip.
As preferred embodiment, described differential amplifier is the amplifier of CS3002 by model, and peripheral symmetric circuit is formed; The maximum 10uV of CS300 chip 2 input offset voltage, with the maximum 0.05uV/ DEG C of temperature drift, rail-to-rail output voltage swing, this differential design structure effectively suppresses common mode interference and various noise, is exaggerated differential signal, improves circuit performance.
As preferred embodiment, described differential amplifier inputs and output terminal are separately installed with a protective resistance; Described protective resistance is 100 Ω; Effectively protect circuit.
Further, described ADS1271 chip MODE pin floating; Its FORMAT pin ground connection; Its SYNC/PDWN pin ground connection.
(3) beneficial effect
Instrument high-speed AD sampling module of the present utility model, solve the sample rate existed in prior art inadequate, the problem such as low level signal amplification and squelch, instrument connects in the uptime and by algorithm, the precision of instrument is improved greatly simultaneously.By application of the present invention, such as two weighing platform, 8 sensor 8 road Real-time Collections, rig-site utilization has lacked a lot of problem; As the accuracy of weighing, the judgement of reversing, accuracy has had very large lifting.
Accompanying drawing explanation
Fig. 1 is differential amplifier circuit schematic diagram of the present utility model;
Fig. 2 is AD sampling module circuit theory diagrams of the present utility model.
Embodiment
A kind of instrument high-speed AD sampling module as depicted in figs. 1 and 2, instrument high-speed AD sampling module of the present utility model, comprises two load cell SIN_1+, the SIN_1-of same model, differential amplifier 1 and AD sampling module 2; Described AD sampling module 2 is consisted of classical connection ADS1271 chip AD_1 and its peripheral circuit; Described two load cell SIN_1+, SIN_1-are connected respectively to the input end of differential amplifier 1; Described differential amplifier 1 output terminal is connected to AINP end and the AINN end of ADS1271 chip AD_1.
As shown in Figure 1, described differential amplifier 1 is the amplifier of CS3002 by model, and peripheral symmetric circuit is formed; The maximum 10uV of CS300 chip 2 input offset voltage, with the maximum 0.05uV/ DEG C of temperature drift, rail-to-rail output voltage swing, this differential design structure effectively suppresses common mode interference and various noise, is exaggerated differential signal, improves circuit performance; Described differential amplifier 1 input end and output terminal are separately installed with a protective resistance R1, R2, R6, R17; Described protective resistance R1, R2, R6, R17 are 100 Ω; Effectively protect circuit.
As shown in Figure 2, AD sampling section adopts high precision 24 ADS1271, and adopt difference analogue input, input clock frequency is 27MHz, and output data rate is 52 734SPS; ADS1271 has 3 kinds of mode of operations: high speed, high resolving power and low-power consumption mode, can be selected by pin MODE; The utility model by by ADS1271 by MODE pin floating under making ADS1271 be operated in high resolution model, ADS1271 FORMAT pin ground connection is made to adopt SPI serial line interface, by SYNC/PDWN pin ground connection, under making ADS1271 be operated in power-down mode; ADS1271 daisy chaining connects the real-time that ensure that data acquisition.
Due to the amplifier of CS3002 and the connection of external circuit, and the concrete connection of ADS1271 chip and external circuit all belongs to prior art, is not described in detail in this.
By application of the present invention, such as two weighing platform, 8 sensor 8 road Real-time Collections, rig-site utilization has lacked a lot of problem; As the accuracy of weighing, the judgement of reversing, accuracy has had very large lifting.
Embodiment recited above is only be described preferred implementation of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection domain of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (4)
1. an instrument high-speed AD sampling module, is characterized in that: comprise two load cells of same model, differential amplifier and AD sampling module; Described AD sampling module is consisted of classical connection ADS1271 chip and its peripheral circuit; Described two load cells are connected respectively to the input end of differential amplifier; Described differential amplifier output terminal is connected to AINP end and the AINN end of ADS1271 chip.
2. instrument high-speed AD sampling module according to claim 1, is characterized in that: described differential amplifier is the amplifier of CS3002 by model, and peripheral symmetric circuit is formed.
3. instrument high-speed AD sampling module according to claim 1, is characterized in that: described differential amplifier inputs and output terminal are separately installed with a protective resistance; Described protective resistance is 100 Ω.
4. instrument high-speed AD sampling module according to claim 1, is characterized in that: described ADS1271 chip MODE pin floating; Its FORMAT pin ground connection; Its SYNC/PDWN pin ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059988.9U CN204389002U (en) | 2015-01-28 | 2015-01-28 | A kind of instrument high-speed AD sampling module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059988.9U CN204389002U (en) | 2015-01-28 | 2015-01-28 | A kind of instrument high-speed AD sampling module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204389002U true CN204389002U (en) | 2015-06-10 |
Family
ID=53361713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520059988.9U Active CN204389002U (en) | 2015-01-28 | 2015-01-28 | A kind of instrument high-speed AD sampling module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204389002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318894A (en) * | 2015-12-08 | 2016-02-10 | 青岛歌尔声学科技有限公司 | Acquisition circuit of double sensors and electronic product with double sensors |
| CN105356880A (en) * | 2015-11-23 | 2016-02-24 | 南阳理工学院 | Circuit for collecting dual-path sensor data by utilizing one-path AD acquisition channel |
-
2015
- 2015-01-28 CN CN201520059988.9U patent/CN204389002U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356880A (en) * | 2015-11-23 | 2016-02-24 | 南阳理工学院 | Circuit for collecting dual-path sensor data by utilizing one-path AD acquisition channel |
| CN105356880B (en) * | 2015-11-23 | 2018-07-06 | 南阳理工学院 | The circuit of modulus acquisition channel acquisition two-way sensing data all the way |
| CN105318894A (en) * | 2015-12-08 | 2016-02-10 | 青岛歌尔声学科技有限公司 | Acquisition circuit of double sensors and electronic product with double sensors |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102403938B (en) | Decoding device and method for rotary transformer based on single FPGA (Field Programmable Gate Array) | |
| CN102930741B (en) | Method for detecting high high-precision parking space detection system | |
| CN102226711B (en) | Dynamic weighing method of vehicle and apparatus thereof | |
| CN205664920U (en) | Modular whole car weighing apparatus weighing system | |
| CN204389002U (en) | A kind of instrument high-speed AD sampling module | |
| CN107525963A (en) | A kind of current sample method based on Hall | |
| CN203037829U (en) | Electric car continuous mileage obtaining apparatus | |
| CN103616064A (en) | Long-table-face dynamic rail weighbridge weighing system | |
| CN203249964U (en) | Power battery voltage acquisition system | |
| CN202853621U (en) | Signal processing circuit of inertial navigation system | |
| CN110244345B (en) | Three-dimensional imaging tunnel geology advanced predictor and prediction method | |
| CN203298845U (en) | Wireless real-time vehicle weight measuring system | |
| CN201113493Y (en) | Battery voltage sampling circuit | |
| CN206601439U (en) | Isolated form storage battery flow measurement circuitry based on current divider | |
| CN201897473U (en) | Digital inclination sensor | |
| CN105467326A (en) | Device and method for detecting surplus capacity of power battery | |
| CN204479725U (en) | The jamproof batteries of electric automobile signal pickup assembly of a kind of small volume low watt consumption | |
| CN102636243A (en) | Highway axle load dynamic data acquisition system and processing method thereof | |
| CN202649436U (en) | Battery power sensing control device | |
| CN205374585U (en) | Current collection device | |
| CN207423338U (en) | Vehicle dynamic weighing system | |
| CN110119856A (en) | Charging station site selection system and method based on sensing network | |
| CN203084929U (en) | Detection device for traffic flow | |
| CN201724826U (en) | Detection device of four wheel position indicator | |
| CN205910842U (en) | High -speed vehicle axle carries detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |