CN203191724U - Digital quantity acquisition device with self-detection - Google Patents
Digital quantity acquisition device with self-detection Download PDFInfo
- Publication number
- CN203191724U CN203191724U CN 201320175388 CN201320175388U CN203191724U CN 203191724 U CN203191724 U CN 203191724U CN 201320175388 CN201320175388 CN 201320175388 CN 201320175388 U CN201320175388 U CN 201320175388U CN 203191724 U CN203191724 U CN 203191724U
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- self
- microprocessor
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- circuit
- detection
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Abstract
The utility model discloses a digital quantity acquisition device with self-detection. The digital quantity acquisition device with self-detection comprises a microprocessor, a USB (universal serial bus) interface power supply circuit, a digital quantity input interface and a self-detection circuit, wherein the digital quantity input interface is connected to the microprocessor via a filter circuit and a buffer circuit sequentially; the USB interface power supply circuit comprises a USB conversion module; one end of the USB conversion module is connected to the microprocessor, and the other end of the USB conversion module is connected to the USB port of an outer end; and the input end of the self-detection circuit is connected to the microprocessor, and the output end of the self-detection circuit is connected to the digital quantity input interface via a unidirectional conduction circuit. The digital quantity acquisition device with self-detection disclosed by the utility model has the following beneficial effects that: a USB power supply mode is adopted, and the system is supplied with power via a USB conversion chip, so that the device can obtain power only by being inserted in the USB interface of a main controller; and moreover, the device is further provided with a self-detection module, and faults occurring at a digital quantity input end can be rapidly detected via the self-detection module, so that the maintenance speed is increased.
Description
Technical field
The utility model relates to a kind of self-monitoring digital data acquisition device of being with.
Background technology
A large amount of digital data acquisition devices is adopted in Industry Control, testing ground etc., be used for the on-the-spot running situation of monitoring, need a lot of sockets to go to satisfy power supply like this, feasible wiring is very inconvenient, and existing digital data acquisition is when bringing out existing fault, need go one by one to check, expend a large amount of time.
The utility model content
The purpose of this utility model namely is to overcome the deficiency of present technology, and a kind of self-monitoring digital data acquisition device of being with is provided, and solves existing digital data acquisition device power supply inconvenience, and fault is got rid of slow defective.
The utility model is achieved through the following technical solutions: be with self-monitoring digital data acquisition device, comprise microprocessor, the USB interface feed circuit, digital-quantity input interface and self-detection circuit, described digital-quantity input interface is successively by a filtering circuit, a buffer circuit is connected to microprocessor, the USB interface feed circuit comprise the USB modular converter, USB modular converter one end is connected to microprocessor, the other end connects the outer end by USB interface, the input end of described self-detection circuit is connected to microprocessor, and output terminal is connected to digital-quantity input interface by a unidirectional turning circuit.
Described unidirectional turning circuit is diode.
Be connected with a communication module on the described microprocessor, microprocessor connects host computer by communication module.
Be connected with a display and reseting module on the described microprocessor.
The beneficial effects of the utility model are: adopt the USB powering mode, be system power supply by a USB conversion chip, make this device only need namely obtain power supply on the USB interface of insertion master control, and this device also is provided with one from detecting module, can detect the fault that the digital quantity input end occurs rapidly by detecting module certainly, accelerate maintenance speed.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of self-detection circuit.
Embodiment
The utility model is described in further detail below in conjunction with embodiment, but structure of the present utility model is not limited only to following examples:
[embodiment]
As shown in Figure 1, be with self-monitoring digital data acquisition device to comprise microprocessor, USB interface feed circuit, digital-quantity input interface and self-detection circuit, described digital-quantity input interface is connected to microprocessor by a filtering circuit, a buffer circuit successively, the USB interface feed circuit comprise the USB modular converter, USB modular converter one end is connected to microprocessor, the other end connects the outer end by USB interface, the input end of described self-detection circuit is connected to microprocessor, and output terminal is connected to digital-quantity input interface by a unidirectional turning circuit.
Described unidirectional turning circuit is diode.
Be connected with a communication module on the described microprocessor, microprocessor connects host computer by communication module.
Be connected with a display and reseting module on the described microprocessor.
The microprocessor of present embodiment adopts the chip of S3C2410 model; The USB interface modular converter of present embodiment adopts the AIC1526 chip, and the electric current of 500MA is provided to system.
The utility model obtains power supply by USB port, need not the access of external power source, and is plug and play, has made things convenient for use.
As shown in Figure 2, structural drawing for self-detection circuit, comprise voltage comparator, photoelectrical coupler and a field effect transistor, import from voltage comparator, light emitting diode ground connection is leaded up in the output of voltage comparator, whether normal, another road is connected to output terminal through photoelectrical coupler, field effect transistor, namely is connected on all digital-quantity input interface if being used for the calibrating input; When microprocessor is exported a low level to self-detection circuit, the output terminal of self-detection circuit namely can all be exported a high level to all digital-quantity input interface, when microprocessor was exported a high level to self-detection circuit, the output terminal of self-detection circuit namely can be blocked.
In the time of need detecting the digital quantity input, namely disconnect digital-quantity input interface and extraneous being connected, microprocessor is to the self-detection circuit output low level, the high level signal of self-detection circuit output terminal is transferred to microprocessor by digital-quantity input interface, whether the communication that microprocessor is examined and determine digital-quantity input interface is normal, and send to display and show convenient for maintaining.
Claims (5)
1. be with self-monitoring digital data acquisition device, it is characterized in that: comprise microprocessor, USB interface feed circuit, digital-quantity input interface and self-detection circuit, described digital-quantity input interface is connected to microprocessor by a filtering circuit, a buffer circuit successively, the USB interface feed circuit comprise the USB modular converter, USB modular converter one end is connected to microprocessor, the other end connects the outer end by USB interface, the input end of described self-detection circuit is connected to microprocessor, and output terminal is connected to digital-quantity input interface by a unidirectional turning circuit.
2. according to claim 1ly be with self-monitoring digital data acquisition device, it is characterized in that: described unidirectional turning circuit is diode.
3. according to claim 1ly be with self-monitoring digital data acquisition device, it is characterized in that: be connected with a communication module on the described microprocessor, microprocessor connects host computer by communication module.
4. according to arbitrary described self-monitoring digital data acquisition device of being with in the claim 1～3, it is characterized in that: be connected with a display on the described microprocessor.
5. according to claim 1ly be with self-monitoring digital data acquisition device, it is characterized in that: be connected with a reseting module on the described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175388 CN203191724U (en) | 2013-04-10 | 2013-04-10 | Digital quantity acquisition device with self-detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175388 CN203191724U (en) | 2013-04-10 | 2013-04-10 | Digital quantity acquisition device with self-detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203191724U true CN203191724U (en) | 2013-09-11 |
Family
ID=49108572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320175388 Expired - Fee Related CN203191724U (en) | 2013-04-10 | 2013-04-10 | Digital quantity acquisition device with self-detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203191724U (en) |
-
2013
- 2013-04-10 CN CN 201320175388 patent/CN203191724U/en not_active Expired - Fee Related
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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: 20130911 Termination date: 20140410 |