CN111079464A - Data terminal and data acquisition method thereof - Google Patents
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- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/146—Methods for optical code recognition the method including quality enhancement steps
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/1098—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices the scanning arrangement having a modular construction
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Abstract
The invention provides a data terminal and a data acquisition method, wherein the data terminal is characterized by comprising a trigger, a data acquisition unit and a data acquisition unit, wherein the trigger is used for triggering to generate a trigger signal and generating a trigger end signal when the triggering is finished; the data acquisition unit is used for acquiring data; a memory to provide a storage space; the processor is used for sequentially storing the trigger signal and the trigger end signal into the signal queue in real time, calling the signal in the signal queue and triggering the decoding of the data acquired by the data acquisition unit when the signal is the trigger signal; and when the signal is a trigger end signal, ending the decoding; wherein: the processor judges the decoding process preferentially before calling the signals in the signal queue or judging whether the signals are trigger end signals each time, so that the signals in the signal queue are continuously called when the signals are judged not to be decoded; and when decoding, judging whether the decoding time reaches a preset threshold value and then continuously calling the signals in the signal queue.
Description
Technical Field
The invention relates to a data terminal and a data acquisition method thereof.
Background art:
when the existing bar code collector scans bar codes, a user triggers scanning by pressing a button, and meanwhile, a main control unit starts decoding; the scanning ends when the user releases the button, and the main control unit ends the decoding at the same time. Since the decoding time of a barcode collector is usually about 150ms, the decoding time even needs 200ms for some barcodes which are difficult to decode. However, when the user presses the button quickly, the time for pressing the button each time can reach below 200ms, so that sometimes the user releases the button when the barcode collector is decoding, the decoding is terminated, the decoding fails, the scanning efficiency is reduced, and the barcode is easy to miss scanning when continuously scanning.
The invention provides a new data terminal and a data acquisition method thereof aiming at the problems, and adopts a new method and a technical means to solve the problems.
Disclosure of Invention
In view of the problems faced by the background art, the present invention has been made in an object to provide a data terminal and a data collecting method thereof, which are parallel to the processing process of a trigger signal and a trigger end signal and the decoding and end decoding processes.
In order to achieve the purpose, the invention adopts the following technical means:
the present invention provides a data terminal, characterized by comprising: the trigger is used for triggering to generate a trigger signal and generating a trigger end signal when the triggering is ended; the data acquisition unit is used for acquiring data; a memory to provide a storage space; the processor is used for sequentially storing the trigger signal and the trigger end signal into the signal queue in real time, calling the signal in the signal queue and triggering the decoding of the data acquired by the data acquisition unit when the signal is the trigger signal; and when the signal is a trigger end signal, ending the decoding; wherein: the processor judges the decoding process preferentially before calling the signals in the signal queue or judging whether the signals are trigger end signals each time, so that the signals in the signal queue are continuously called when the signals are judged not to be decoded; and when decoding, judging whether the decoding time reaches a preset threshold value and then continuously calling the signals in the signal queue.
Optionally, the processor is a multi-core processor, where the first core is configured to establish a signal queue, and the second core is configured to periodically invoke a signal in the signal queue.
Optionally, the third core of the processor is configured to decode data collected by the data collector.
Optionally, a decoding chip is included, the process of decoding the data is performed in the decoding chip, and the processor determines the decoding process.
Optionally, the trigger is a key, and the user presses the key to trigger the key to generate a trigger signal, and generates a trigger end signal when the key is released.
The invention provides a data acquisition method which is characterized by comprising the following steps: s1, sequentially generating a trigger signal and a trigger end signal through a trigger; s2, storing the trigger signal and the trigger end signal into a signal queue in real time through a processor; s3, judging whether the decoding is in progress, if so, judging whether the decoding time reaches a preset threshold value and executing S4; if not, directly executing S4; and S4, calling the signal in the signal queue, triggering the data collected by the data collector to be decoded and executed S3 when the signal is a trigger signal, and ending the decoding and executed S3 when the signal is a trigger end signal.
Optionally, the processor is a multi-core processor, where the first core is configured to establish a signal queue, and the second core is configured to periodically invoke a signal in the signal queue.
Optionally, the third core of the processor is configured to decode data collected by the data collector.
Optionally, the process of decoding the data is performed in a decoding chip, and the processor determines the decoding process.
Alternatively, in S4, when the signal queue is empty, S3 is performed.
Compared with the prior art, the invention has the following beneficial effects:
the data terminal and the data acquisition method thereof of the invention sequentially store the trigger signal and the trigger end signal into the signal queue in real time through the processor, call the signal in the signal queue, and trigger the decoding of the data acquired by the data acquisition unit when the signal is the trigger signal; and when the signal is a trigger end signal, ending the decoding; before calling the signals in the signal queue or before judging whether the signals are trigger end signals or not, the processor preferentially judges the decoding process so as to continuously call the signals in the signal queue when judging that the signals are not decoded; when decoding, whether the decoding time reaches a preset threshold value is judged first, and the signal in the signal queue is called continuously. The processing process of the trigger signal and the trigger ending signal is parallel to the decoding and ending process, and the judgment priority of the decoding process is higher than that of the trigger ending signal, so that the ongoing decoding process is preferentially controlled by a preset threshold value.
Drawings
FIG. 1 is a perspective view of a data terminal of the present invention;
FIG. 2 is an enlarged view of the data collector of the present invention;
FIG. 3 is a block diagram of a data terminal according to one embodiment of the present invention;
FIG. 4 is a flow chart of a data terminal establishing a signal queue according to the present invention;
FIG. 5 is a flow chart of data terminal processing data in an embodiment of the present invention;
FIG. 6 is a flow chart of data terminal processing data in another embodiment of the present invention;
fig. 7 is a block diagram of a data terminal according to still another embodiment of the present invention.
Detailed description of the embodiments reference is made to the accompanying drawings in which:
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Detailed Description
For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.
As shown in fig. 1, an example of the data terminal 100 of the present invention is a hand-held terminal (PDA), and the structure, function and usage of the data terminal 100 will be described in detail below by taking the hand-held terminal as an example.
As shown in fig. 1, 2 and 3, the data terminal 100 includes a housing 1 for protection, and a data collector 5, a processor 8 and a memory 9 accommodated in the housing 1.
The shell 1 is provided with a plurality of keys 2, and at least one key 2 forms a trigger. The front surface of the shell 1 is provided with a display screen 3, and the front end surface is provided with a window 4, so that the data collector 5 can collect data through the window 4.
The data collector 5 is used for collecting image data, such as one-dimensional codes, two-dimensional codes or other image-text data. The data acquisition device 5 comprises a camera 6 and a light supplement lamp 7, wherein the camera 6 is used for acquiring images, converting image signals into digital signals through photoelectric conversion and transmitting the digital signals to the processor 8; the light supplement lamp 7 is used for supplementing light to a target image, so that the camera 6 can acquire a clearer image.
The processor 8 is a multi-core processor 8, preferably four-core or more processors 8, and includes a first core, a second core, and a third core, the processor 8 is electrically connected to the key 2, the data collector 5, and the memory 9, respectively, and the memory 9 is used to provide a storage space for storing data and programs, such as a decoding library.
Referring to fig. 4, the first core of the processor 8 is configured to receive a trigger signal and a trigger end signal generated by triggering the key 2, and further store the trigger signal and the trigger end signal into the memory 9 in real time to form a signal queue, specifically, when the user presses the key 2, the key 2 generates the trigger signal, and when the user releases the key 2, the key 2 generates the trigger end signal, and a process of storing the trigger signal and the trigger end signal into the signal queue is a first thread.
Referring to fig. 5, the second core is configured to determine a decoding process of the third core, and the determining process is started with the power on, when the second core determines that the third core is decoding, the second core continues to determine whether a decoding time reaches a preset threshold, and then controls the decoding process of the third core through the preset threshold. This process is referred to as the second thread and will be described in detail later.
The preset threshold is artificially set to be slightly larger than the average decoding time of the third kernel, and since the average decoding time of most of the processor 8 on most of the coded barcodes is about 150ms, the preset threshold is preferably 150-200ms, and is further preferably 200 ms. For some bar codes which are difficult to decode, the decoding time may exceed 200ms, the preset threshold value can be properly prolonged according to needs, and otherwise, the preset threshold value can be shortened.
The second core is further configured to periodically call a signal in the signal queue, the calling mode is first-in first-out, and the period is set to be within 50ms, preferably 5-30ms, and further preferably 10ms, which is much shorter than the average decoding time of the processor 8, which not only ensures that the process of periodically calling the signal can be performed quickly, but also enables the second core to have sufficient time to call the signal and make a judgment. This process is referred to as a third thread. When the second core calls a trigger signal, an instruction is sent to control the data collector 5 to collect data, specifically, the processor 8 is triggered by the trigger signal to control a light supplement lamp 7 of the data collector 5 to supplement light and control the camera 6 to collect images with the supplemented light, and the third core further calls a decoding library in the memory 9 to decode the image data collected by the data collector 5; when the second core calls a trigger end signal, the decoding is ended; when the signal queue is empty, the second thread will be executed again.
Since both the third thread and the second thread are periodically performed in the second core, the priority of the second thread is set to be higher than that of the third thread. Specifically, in the second thread, when the decoding time does not reach the preset threshold and the third core is successfully decoded, the third core will finish decoding and trigger the second core to finish the second thread and start the third thread, when the decoding time does not reach the preset threshold and the third core is still decoding, the next cycle is entered, and when the decoding time reaches the preset threshold and the third core is still decoding, the second core will directly finish the second thread and start the third thread; and when the second core judges that the third core is not decoded, directly ending the second thread and starting the third thread. Because the priority of the second thread is higher than that of the third thread, the decoding process is preferentially controlled by the preset threshold, and only when the decoding time exceeds the preset threshold, the trigger ending signal is called to end the decoding, so that the decoding process has enough time to be carried out. For example, when the time interval from the pressing of the key 2 to the releasing of the key 2 by the user is only 130ms, and the time from the acquisition to the decoding of the barcode of the data terminal 100 is 156ms, in the first 10ms period, the second core judges that the third core is not decoded in the second thread and starts the third thread, and judges that the signal is the trigger signal in the third thread and starts the third core to decode and end the current period; in the next 10ms period, the second core judges that the third core is still decoding, and the decoding time does not reach the preset threshold value of 200ms, and the next 10ms period is directly entered; this is repeated for 13 cycles to 130ms at which time a trigger complete signal has been generated, however, since the second thread has a higher priority than the third thread, the decoding process in the third core will continue until decoding succeeds at 156ms, the third core completes decoding and triggers the second core to start the third thread.
For the situation that a user presses the key 2 for a long time, setting a timeout time in a third thread, when the second core judges that the decoding time of the third core reaches a preset threshold value, judging whether the total decoding time of a decoding process triggered by a previous trigger signal reaches the timeout time again in the third thread, if so, triggering the third core to end decoding, and finishing the current cycle and starting the next cycle by the second core; if the time-out time has not been reached, the next cycle is started directly until the decoding is successful or the decoding times out.
Taking a preset threshold of 200ms, a period of 10ms and a timeout period of 6s as an example, a timeout process is described in detail: when a user presses the key 2 for a long time, the key 2 only sends out a trigger signal once, the first core stores the trigger signal into a signal queue, meanwhile, the second core executes a second thread and a third thread in a cycle of 10ms, the second core firstly judges that the third core is not decoded, so as to start a signal in a third thread calling signal queue, when the second core judges that the called signal is the trigger signal, namely, a light supplement lamp 7 is triggered to supplement light, a data collector 5 transmits collected data to the third core for decoding, the cycle is ended after 10ms, the next 10ms cycle is entered, in the next cycle, the second core judges that the third core is decoding, the decoding time is not accumulated to a preset threshold value, the cycle is repeated again for 20 times, the decoding time is accumulated to the preset threshold value of 200ms, the second core finishes the second thread and starts the third thread, since the signal queue is empty (only one time the trigger signal has been called, and the user is pressing the key 2 for a long time, the trigger end signal has not been generated), the second core determines that the whole decoding time has not reached the timeout time, so as to end the current cycle and enter the next cycle, and thus the 600 cycles are repeated until the timeout time reaches 6s, that is, the third core ends decoding.
The above is merely illustrated to facilitate the understanding of the whole technical solution by those skilled in the art, and the purpose of the whole technical solution is: the acquisition (signal queue establishment) and the calling of the trigger signal and the trigger end signal are carried out in parallel, and the control is carried out through the cycle time, the preset threshold, the overtime time and the thread priority in the signal calling process, so that the decoding process is controlled through the preset threshold and the decoding result preferentially before the calling of the trigger end signal finishes decoding, and the situation that the decoding is not successfully completed and the trigger end signal directly triggers to finish decoding is avoided when the quick key 2 is pressed.
In order to achieve the above object, as shown in fig. 6, in another embodiment, the second thread may be incorporated into the third thread, that is, the second thread is only required to be arranged in the third thread before the trigger end signal is called, that is, before whether the called signal is the trigger end signal is judged, the decoding process is judged first, and when decoding, the decoding process is controlled by a preset threshold, so as to avoid calling the trigger end signal preferentially to end decoding directly.
In this embodiment, a plurality of threads are executed in a plurality of cores of the processor 8; in other embodiments, the processor 8 may be a chip-scale multiprocessor 8 or a simultaneous multi-threaded processor 8, or even a symmetric multiprocessor or the like, which can process multiple threads simultaneously.
In this embodiment, the trigger is a key 2; in other embodiments (not shown, the same below), the trigger may be a virtual key on the touch screen; or the trigger may be a sensor (e.g., a gravity sensor, an acceleration sensor, a gyroscope, or the like) which can be used to detect a specific gesture of the user (e.g., a gravity sensor) so as to trigger generation of the trigger signal; or the trigger is a distance sensor (such as an IR proximity sensor), and is triggered to generate a trigger signal when an object is detected to be close, and the trigger signal disappears when the object is moved.
As shown in fig. 7, in another embodiment, the data collector 5 may include a decoding chip 10 (or a decoding board), that is, the data collector 5 has the decoding chip 10 integrated thereon for decoding the data collected by the data collector 5, without integrating a decoding function into the processor 8; or the decoding chip 10, the data collector 5 and the processor 8 are all separately arranged. So that the decoding process takes place in said decoding chip 10 and the decision on the decoding process takes place in the processor 8.
Referring to fig. 4 and fig. 5 again, the flow chart of the data terminal 100 for acquiring data according to the present invention includes the following steps:
and S1, sequentially generating a trigger signal and a trigger end signal through the trigger.
As mentioned above, when the user presses the key 2, the key 2 generates a trigger signal, and when the user releases the key 2, the key 2 generates a trigger end signal.
And S2, storing the trigger signal and the trigger end signal into a signal queue in real time through the processor 8.
As mentioned above, the processor 8 is a multi-core processor 8, the first core is configured to sequentially store the received trigger signal and the trigger end signal into the signal queue in the memory 9 in real time, the second core is configured to call the signal in the signal queue, and the third core is configured to decode time.
S3, judging whether the decoding is in progress, if so, judging whether the decoding time reaches a preset threshold value and executing S4; if not, S4 is executed directly.
As mentioned above, the second core of the processor 8 determines whether the third core is decoding, determines whether the decoding time reaches a preset threshold when the third core is decoding, and executes S4 when the decoding time reaches the preset threshold; and when the decoding time does not reach the preset threshold value, the decoding is finished, which indicates that the decoding is successful, the third core automatically stops decoding, and the second core continues to execute step S4. If the third core is not decoded, S4 is directly performed.
S4, calling the signal in the signal queue, triggering the data collected by the data collector 5 to be decoded and executing S3 when the signal is a trigger signal, and ending the decoding and executing S3 when the signal is a trigger end signal.
Specifically, when the second core determines that the signal is the trigger signal, the fill light lamp 7 is triggered to fill light, so that the camera 6 can acquire a clear image, the data acquisition device 5 converts the image into a digital signal and transmits the digital signal to the third core, the third core further calls a decoding library stored in the memory 9 to decode the data, and the step S3 is repeated again; when the second core judgment signal is a trigger end signal, directly triggering the third core to end decoding, turning off the light supplement lamp 7, and repeating the step S3 again; when the second kernel determines that the signal queue is empty, S3 is executed again, when it is determined that decoding is not performed, it indicates that decoding has ended, and the user has stopped operating, thereby ending the entire data acquisition process, and when it is determined that decoding is still performed, it indicates that the user presses the key 2 for a long time, and it is further determined whether the decoding time reaches the preset threshold. For the case that the user presses the key 2 for a long time, the control is performed by setting the timeout, and the process is as described above.
Finally, upon successful decoding, the processor 8 displays the decoded information on the display 3.
In other embodiments, as shown in fig. 6, the second thread may be incorporated into the third thread, that is, the second thread is only required to be arranged before the trigger end signal is called in the third thread, that is, the decoding process is determined before determining whether the called signal is the trigger end signal, and when decoding, the decoding process is controlled by a preset threshold, so as to avoid that the decoding is directly ended by calling the trigger end signal preferentially.
In other embodiments, the data terminal 100 may include a decoding chip 10, and the process of decoding the data collected by the data collector 5 may be performed in the decoding chip 10, and other steps are the same as those in the above embodiments.
The data terminal and the data acquisition method thereof have the following beneficial effects:
according to the data terminal 100 and the data acquisition method thereof, the processor 8 sequentially stores the trigger signal and the trigger end signal into the signal queue in real time, calls the signal in the signal queue, and triggers the decoding of the data acquired by the data acquisition unit 5 when the signal is the trigger signal; and when the signal is a trigger end signal, ending the decoding; and the processor 8 judges the decoding process preferentially before calling the signal in the signal queue or before judging whether the signal is a trigger end signal each time, so that the signal in the signal queue is continuously called when the signal is judged not to be decoded; when decoding, whether the decoding time reaches a preset threshold value is judged first, and the signal in the signal queue is called continuously. The processing process of the trigger signal and the trigger ending signal is parallel to the decoding and ending process, and the judgment priority of the decoding process is higher than that of the trigger ending signal, so that the ongoing decoding process is preferentially controlled by a preset threshold value.
The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.
Claims (10)
1. A data terminal, comprising:
the trigger is used for triggering to generate a trigger signal and generating a trigger end signal when the triggering is ended;
the data acquisition unit is used for acquiring data;
a memory to provide a storage space;
the processor is used for sequentially storing the trigger signal and the trigger end signal into the signal queue in real time, calling the signal in the signal queue and triggering the decoding of the data acquired by the data acquisition unit when the signal is the trigger signal; and when the signal is a trigger end signal, ending the decoding; wherein:
the processor judges the decoding process preferentially before calling the signals in the signal queue or judging whether the signals are trigger end signals each time, so that the signals in the signal queue are continuously called when the signals are judged not to be decoded; and when decoding, judging whether the decoding time reaches a preset threshold value and then continuously calling the signals in the signal queue.
2. The data terminal of claim 1, wherein: the processor is a multi-core processor, wherein a first core is used for establishing a signal queue, and a second core is used for periodically calling signals in the signal queue.
3. The data terminal of claim 2, wherein: and the third core of the processor is used for decoding the data collected by the data collector.
4. The data terminal of claim 1, wherein: the decoding chip is used for decoding data, and the processor judges the decoding process.
5. The data terminal of claim 1, wherein: the trigger is a key, a user presses the key to trigger the key to generate a trigger signal, and a trigger end signal is generated when the key is released.
6. A data acquisition method is characterized by comprising the following steps:
s1, sequentially generating a trigger signal and a trigger end signal through a trigger;
s2, storing the trigger signal and the trigger end signal into a signal queue in real time through a processor;
s3, judging whether the decoding is in progress, if so, judging whether the decoding time reaches a preset threshold value and executing S4; if not, directly executing S4;
and S4, calling the signal in the signal queue, triggering the data collected by the data collector to be decoded and executed S3 when the signal is a trigger signal, and ending the decoding and executed S3 when the signal is a trigger end signal.
7. The data acquisition method of claim 6, wherein: the processor is a multi-core processor, wherein a first core is used for establishing a signal queue, and a second core is used for periodically calling signals in the signal queue.
8. The data acquisition method of claim 7, wherein: and the third core of the processor is used for decoding the data collected by the data collector.
9. The data acquisition method of claim 6, wherein: the process of decoding the data is carried out in a decoding chip, and the processor judges the decoding process.
10. The data acquisition method of claim 6, wherein: in S4, when the signal queue is empty, S3 is performed.
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| US5914476A (en) * | 1997-11-04 | 1999-06-22 | Welch Allyn, Inc. | Optical reader configured to accurately and rapidly read multiple symbols |
| CN101675441A (en) * | 2007-02-05 | 2010-03-17 | 手持产品公司 | Be used to improve the dual-task decoder that symbol reads |
| US20090242635A1 (en) * | 2008-03-26 | 2009-10-01 | Hand Held Products, Inc. | Processing scheme for an indicia reader |
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