CN201638047U - Data collecting device based on USB interface - Google Patents
Data collecting device based on USB interface Download PDFInfo
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- CN201638047U CN201638047U CN 201020174080 CN201020174080U CN201638047U CN 201638047 U CN201638047 U CN 201638047U CN 201020174080 CN201020174080 CN 201020174080 CN 201020174080 U CN201020174080 U CN 201020174080U CN 201638047 U CN201638047 U CN 201638047U
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- usb interface
- usb
- converter
- control circuit
- digital quantity
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Abstract
The utility model provides a data collecting device based on a USB interface, which comprises an A/D converter, a USB control circuit and a micro processor. The A/D converter is used for converting analog signal into digital quantity; the USB control circuit is provided with the USB interface, and is connected with an overriding controlling machine through the USB interface; the micro processor is used for receiving the digital quantity output by the A/D converter and controlling the USB control circuit to transmit the digital quantity to the overriding controlling machine through the USB interface or receiving control instructions transmitted by the overriding controlling machine through the USB interface, and is connected between the A/D converter and the USB control circuit. The data collecting device has advantages of high-speed information transmission, convenient installation, supporting of plug and play, easy extending, small electromagnetic interference, and high performance-price ration and the like, has wide application in communication, remote sensing, intelligent instruments and meters, and industrial automation and other fields.
Description
Technical field
The utility model relates to a kind of data collector, the data collector that especially relates to a kind of employing USB (universal serial bus) (USB) interface, had the high-speed transfer function by microprocessor controls.
Background technology
Especially control automatically, detect, give a violent shake to, field such as intelligence instrument, need to use data collector often.At present, data acquisition system (DAS) both domestic and external data collecting card commonly used is generally: the data collecting card of the data collecting card of the data collecting card of RS-232 interface, RS-485 interface, the data collecting card of pci interface, ISA interface etc.Though these data collecting cards have advantage separately, shortcoming is separately arranged also.For example: the transmission speed of the data collecting card of the data collecting card of RS-232 interface, RS-485 interface is slower, and the data acquisition calorie requirement of the data collecting card of pci interface, ISA interface is inserted on the PCI slot or ISA slot of main control system (being generally PC or server), has defectives such as using inconvenience.
The utility model content
The utility model proposes a kind of USB interface-based data collector, it adopts USB (universal serial bus) (USB) interface, realizes the high-speed transfer of Information Monitoring by microprocessor controls to have the defective that transmission speed is slow, use inconvenience thereby solve present data collecting card.
The utility model has adopted following technical scheme to realize: a kind of USB interface-based data collector, and it comprises: the A/D converter that is used for the analog signal conversion of input is become digital quantity; USB control circuit with USB interface connects upper control machine by USB interface; Be used to receive the digital quantity of A/D converter output, and control USB control circuit is sent to upper control machine with digital quantity by USB interface, or accept the microprocessor of upper control machine by the steering order of USB interface transmission, it is connected between A/D converter and the USB control circuit.
Wherein, A/D converter has 8 tunnel 8 simulating signal input channels.
Wherein, microprocessor is the single-chip microcomputer of ARM kernel.
Wherein, the data collector of the USB interface that is set forth in also comprises: be used for the signal of sensor acquisition is done the modulation circuit of amplification, Filtering Processing, it is connected the A/D converter input end.
Because USB (universal serial bus) (USB) interface is a kind of new interface mode, have easy to connect, support hot plug, dispense with outer connecting power, transmission speed height, advantage such as low in energy consumption, therefore, the utility model proposes USB interface-based data collector and be better than traditional real-time data acquisition system, it not only has the advantage of high speed information transmission, also have easy for installation, support plug and play, be easy to expansion, little, the cost performance advantages of higher of electromagnetic interference (EMI).The utility model is commonly employed in fields such as communication, remote sensing, intelligent instrumentation, industrial automations.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the circuit connection diagram of a preferred embodiment of the utility model.
Embodiment
In view of USB (universal serial bus) (USB) is a kind of new interface mode, have easy to connect, support hot plug, dispense with outer connecting power, transmission speed height, advantage such as low in energy consumption.Such as, the peak transfer rate of USB 2.0 is up to 480Mbps.And, USB interface can be used as the upper control machine of data collector (such as, PC, server) be extensive use of, therefore, the utility model provides a kind of USB interface-based high-speed data acquiring device.
As shown in Figure 1, this data collector comprises A/D converter 11, microprocessor 12, the USB control circuit 13 with USB interface and the upper control machine 20 that is electrically connected successively.Its principle of work: by the signal of sensor acquisition after modulation circuit amplification, filtering etc. are handled, simulating signal with 8 or 16 enters A/D converter 11, carry out analog-digital conversion by microprocessor 12 control A/D converters 11, the digital quantity after the conversion enters microprocessor 12 and temporary; Subsequently, by usb control circuit 13 digital quantity is passed to upper control machine 20 and carry out data processing, the control signal that upper control machine 20 is sent is sent to microprocessor 12 by the USB interface of USB control circuit 13 simultaneously.
In conjunction with shown in Figure 2.Chip U1 is the preferred embodiment of A/D converter 11 among Fig. 1, and chip U2 is the preferred embodiment of microprocessor 12 among Fig. 1, and chip U3 is the preferred embodiment of USB control circuit 13 among Fig. 1, the working power of chip U40 for providing in the upper control machine 20.
Wherein, a model that chip U3 selects for use Philips company to release is that the ISP1581 chip is as USB control circuit 13, the ISP1581 chip is the USB2.0 interface circuit of high performance-price ratio, supports 7 inputs (IN) end points, 7 output (OUT) end points and a fixing control IN/OUT end points; Support the mode of operation of returning of the self check mode of operation of USU2.0 and USB1.1, can normally move under the condition at a high speed or at full speed, inside is integrated with FIFO storer, data collector, the 12MHz crystal oscillator of PLL and the voltage adjuster of 3.3V of serial interface engine (SIE), PIE, 8KB, and can directly link to each other with the ATA/ATAPI peripheral hardware, transfer rate reaches as high as 480Mbps/s.
In order to satisfy the requirement of speed, a model that main control chip U2 selects for use Philips company to produce is the LPC2132 chip, it is a single-chip microcomputer based on the ARM7TDMI-STM kernel, the high speed Flash storer and the interior static RAM (SRAM) of 16kB sheet that have the embedding of 64kB, reach the universaling I/O port of 47 5V, 18 tunnel 10 A/D converter, 1 10 D/A converter can provide different simulation output.A plurality of serial line interfaces comprise 2 16C550 industrial standard UART, 2 High Speed I
2C interface (400kbit/s), SPITM and SSP can realize being to the maximum the CPU operating frequency of 60MHz by PLL in the sheet.
Though the LPC2132 chip carries 18 road A/D converter, but its every passage switching time be 2.44us, do not reach the requirement of high-speed data acquisition, therefore selecting model for use is that AD7829 analog to digital converter U1 collocation is used, this AD7829 analog to digital converter is 8 tunnel 8 analog to digital converters, maximum conversion ratio 2Mbps can satisfy the processing requirements of the high-speed transfer of USB interface to data.
Simulating signal becomes digital quantity after AD7829 chip U1 conversion, data leave in earlier in the register of LPC2132 chip U2, send data to ISP1581 chip U3 by LPC2132 chip U2 again, be defined as 8 buffer zones at this buffer zone with ISP1581 chip U3, write respectively 8 the tunnel conversion after data.And upper control machine 20 is connected with ISP1581 chip U3 by USB interface.
To sum up, the usb data harvester that the utility model proposes is better than traditional real-time data acquisition system, it have high-speed transfer, easy for installation, support plug and play, be easy to expansion, little, the cost performance advantages of higher of electromagnetic interference, with ARM7 chip LPC2132 and USB 2.0 interface control chip ISP1581, realize high-speed data acquisition, the single-channel sampling rate is 150Kbps. Thereby the utility model is commonly employed in fields such as communication, remote sensing, intelligent instrumentation, industrial automations.
Claims (4)
1. a USB interface-based data collector is characterized in that, comprising:
Be used for the analog signal conversion of input is become the A/D converter of digital quantity;
USB control circuit with USB interface connects upper control machine by USB interface;
Be used to receive the digital quantity of A/D converter output, and control USB control circuit is sent to upper control machine with digital quantity by USB interface, or accept the microprocessor of upper control machine by the steering order of USB interface transmission, it is connected between A/D converter and the USB control circuit.
2. according to the described USB interface-based data collector of claim 1, it is characterized in that A/D converter has 8 tunnel 8 simulating signal input channels.
3. according to the described USB interface-based data collector of claim 1, it is characterized in that microprocessor is the single-chip microcomputer of ARM kernel.
4. according to the described USB interface-based data collector of claim 1, it is characterized in that, also comprise: be used for the signal of sensor acquisition is done the modulation circuit of amplification, Filtering Processing, it is connected the A/D converter input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020174080 CN201638047U (en) | 2010-04-29 | 2010-04-29 | Data collecting device based on USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020174080 CN201638047U (en) | 2010-04-29 | 2010-04-29 | Data collecting device based on USB interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201638047U true CN201638047U (en) | 2010-11-17 |
Family
ID=43082551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020174080 Expired - Fee Related CN201638047U (en) | 2010-04-29 | 2010-04-29 | Data collecting device based on USB interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201638047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107145462A (en) * | 2017-04-26 | 2017-09-08 | 浙江大学 | A kind of synchronous serial signal acquisition and control device based on usb bus |
-
2010
- 2010-04-29 CN CN 201020174080 patent/CN201638047U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107145462A (en) * | 2017-04-26 | 2017-09-08 | 浙江大学 | A kind of synchronous serial signal acquisition and control device based on usb bus |
| CN107145462B (en) * | 2017-04-26 | 2019-10-11 | 浙江大学 | A kind of synchronous serial signal acquisition and control device based on usb bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20110429 |