CN102175269B - Sensor device capable of changing sampling frequency and control method thereof - Google Patents
Sensor device capable of changing sampling frequency and control method thereof Download PDFInfo
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- CN102175269B CN102175269B CN 201110024869 CN201110024869A CN102175269B CN 102175269 B CN102175269 B CN 102175269B CN 201110024869 CN201110024869 CN 201110024869 CN 201110024869 A CN201110024869 A CN 201110024869A CN 102175269 B CN102175269 B CN 102175269B
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Abstract
The invention discloses a sensor device capable of changing sampling frequency, which is characterized by comprising a sensing device, a signal acquisition device, a processing device, a multi-version control device and a driving executive device. The invention also discloses a control method of the sensor device capable of changing sampling frequency, which is characterized by comprising the following steps of: setting a time parameter and preset data; obtaining information state after receiving outside data by the sensing device, changing the sampling frequency of the signal acquisition device according to the information state, and processing information. The sensor device and the control method thereof provided by the invention can use different frequencies and processing modes so as to rationally deal with abnormal conditions.
Description
Technical field
The present invention relates to the intelligent sensing technical field, relate in particular to a kind of sample frequency intelligence sensor equipment and control method thereof of changing.
Background technology
The sample frequency of sensor data acquisition at first will be considered the maximum frequency that capture card is supported.But the long period uses very high sampling rate may cause not having enough internal memories or hard-disc storage data, thereby causes waste and information explosion.And frequency acquisition is crossed and low can be caused quantity of information inaccurate, is difficult to make appropriate judgement and processing.Sample frequency is set in theory for just much of that by 2 times of collection signal highest frequency component, in fact selects 5～10 times in the engineering, sometimes in order to reduce preferably waveform, in addition higher.
In actual applications, in order to make more refinement of control system, can rationally tackle more abnormal conditions, the present invention considers to improve in prior art, and whether the information that perceives according to sensor device normally comes automatically to adjust the acquisition and processing information of sensor device.Reduce under normal circumstances so on the one hand data acquisition, reduce cost; Under abnormal conditions, strengthen on the other hand the frequency of image data, make appropriate judgement in the hope of obtaining more accurately information, to realize the control of self-adapted sensor device intelligence.
The sensor frequency acquisition of prior art is fixed, in case go wrong, can only adopt fixed mode to process underaction.A kind of sensor device and control method thereof that changes sample frequency provided by the invention can adopt different frequencies and processing mode, as the case may be with reasonable reply abnormal conditions.Reduce under normal circumstances data acquisition, reduce cost; Under abnormal conditions, strengthen the frequency of image data, make appropriate judgement in the hope of obtaining more accurately information.
Summary of the invention
The invention provides a kind of sensor device that changes sample frequency, comprise induction installation, signal pickup assembly, treating apparatus, control device and driving actuating unit.
Wherein, induction installation receives extraneous data with certain fixed frequency; Signal pickup assembly gathers the data that induction installation receives; Treating apparatus receives the data that signal pickup assembly sends, and data are sent to control device through amplification, filtering, A/D after changing; The data that the control device receiving and processing device sends compare data and preset data, and the acquired information state according to the change of information state control signal harvester sample frequency, and calls corresponding control algolithm and output processing suggestion; Drive actuating unit with the control result feedback of control device to signal pickup assembly.In addition receiving trap and dispensing device can also be set; The data that induction installation is received pass to adjacent sensors equipment.
The present invention also provides a kind of employing can change the control method of the sensor device of sample frequency, process comprises: the setting-up time parameter, time parameter is the sampling period of signal pickup assembly, the setting of time parameter is the error according to field data, time parameter can be shortened when error is larger; After induction installation acquisition external data, signal pickup assembly receives the data that induction installation receives with default frequency, in treating apparatus, described data are sent to control device through amplification, filtering, A/D after changing, control device compares described data and preset data, the acquired information state, according to described information state, change the sample frequency of signal pickup assembly and carry out information processing.When receiving data and normal data error 0～0.1% the time, keep former sample frequency constant; When receiving data and normal data error 0.1%～0.5% the time, the sample frequency of signal pickup assembly is increased to original twice, display shows that situation is unusual; When receiving data and normal data error greater than 0.5% the time, call pid algorithm and the sample frequency of signal pickup assembly is increased to original three times, the suggestion of display Graphics Processing.
One of innovation of the present invention is to be, sample frequency can change according to the information state of transmission, and can change processing mode according to actual conditions.
The present invention is compared to prior art, and the process of data acquisition is consistent, and what control algolithm was used also is pid algorithm with the most use.The mode of perception and transmission information is traditional approach, and namely sensor device is input to control module after the data of collection in worksite are changed through A/D.
The whether normal sample frequency of coming automatic adjustment information harvester of the information that the sensor device that the present invention can change proportion perceives according to induction installation.Reduce under normal circumstances so on the one hand data acquisition, reduce cost; Under abnormal conditions, strengthen on the other hand the frequency of image data, make appropriate judgement in the hope of obtaining more accurately information, to realize the control of self-adapted sensor device intelligence.
The control method that changes the sensor device of sample frequency provided by the invention, can automatically adjust the frequency acquisition of signal pickup assembly and carry out information processing according to whether normal the information that perceives is, not only can optimize as much as possible sensor device perception and transmission of information, improve response mechanism, and the sample frequency parameter can be according to the change flexible configuration of using, both realized the control function of traditional intelligence sensor device, and can effectively in time adjust the operation frequency of signal pickup assembly for on-the-spot abnormal conditions, thereby reach the purpose of optimizing sensor device perception and transmission of information.
Description of drawings
Fig. 1 is the structural drawing that the present invention can change the sensor device of sample frequency;
Fig. 2 is wirelessly transmitting data form schematic diagram;
Fig. 3 is the process flow diagram of the control method of the present invention's sensor device that can change sample frequency;
Fig. 4 is the workflow diagram of the control device of the present invention's sensor device that can change sample frequency.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail, be not to be limitation of the present invention.By logic analysis, reasoning or the limited available technical scheme of realization all should be in protection scope of the present invention according to design of the present invention for all those skilled in the art.
Embodiment 1:
Fig. 1 is sensor device structural drawing of the present invention, as shown in Figure 1, comprises induction installation, signal pickup assembly, treating apparatus, control device and driving actuating unit.
Wherein, induction installation receives extraneous data with certain fixed frequency; The data that signal pickup assembly receives with certain frequency collection induction installation; Treating apparatus, it receives the data that signal pickup assembly sends, and data are sent to control device through amplification, filtering, A/D after changing; Control device receives the data that described treating apparatus sends, and data and preset data are compared, and adjusts the sample frequency of signal pickup assembly, and calls corresponding control algolithm and output processing suggestion; Drive actuating unit, its sample frequency after with the control device adjustment feeds back to signal pickup assembly.Drive the sample frequency of actuating unit after with the control device adjustment and feed back to induction installation.
Fig. 3 is the process flow diagram that can change the sensor device control method of frequency, adopts the control method of the sensor device that can change sample frequency in the present embodiment, and its process comprises: setting-up time parameter and preset data; Obtain external data by induction installation, signal pickup assembly receives the data that induction installation receives with default frequency; To send to control device after the data processing such as the amplification of described data process, filtering, A/D conversion in the treating apparatus; As shown in Figure 4, control device compares data and the preset data that receives, and the acquired information state according to described information state, changes the sample frequency of signal pickup assembly and carries out information processing.When receiving data and preset data error 0～0.1% the time, keep former sample frequency constant; When receiving data and preset data error 0.1%～0.5% the time, the sample frequency of described signal pickup assembly is increased to original twice, display shows that situation is unusual; When receiving data and preset data error greater than 0.5% the time, call pid algorithm and the sample frequency of signal pickup assembly is increased to original three times, the suggestion of display Graphics Processing.
The present invention also can arrange receiving trap and dispensing device, and the data that induction installation can be received pass to adjacent sensors equipment.The information of transmitting between receiving trap and dispensing device is the control information of the data that collect of adjacent sensors equipment and control sensor device duty, and the transformat between sensor device is the wireless transmission form.Realize like this phase intercommunication between the multi-sensor device, can allow and carry out the information transmission between the sensor device, in case a sensor device can not satisfy the demands, can start that sensor device is on-the-spot with perception more.Sometimes enable too many sensor device and can cause the wasting of resources, although these sensor device nodes that are not activated are not sampled so, but sampled data that can other sensor devices of perception, and make as the case may be starting and select---such as: this moment is on-the-spot unusual, this sensor device will start so, begin sampling.
Fig. 2 is the schematic diagram of transmitting information wirelessly form:
Wherein, data head is long to be 3byte, and original state can be set to ccc.
The order word length is 1byte, and the receiving trap in the node and the control of dispensing device can be set to by command word: 01-sends data; 02-accepts data and realizes.In order to prolong the life cycle of Intelligent Sensorsystem, can utilize the command word intelligence sensor node to be set to the 03-dormancy; 04-wakes dormancy up.
Data length length is 1 byte, is the byte number of back " data ", and " data " are the data that sensor device receives.
Data are long to be valid data for 0-20 byte, comprises real time data, the position of rest of each start bit, address bit, acquisition channel.
CRC length is 2 byte, and command word is carried out verification to all data of data.
Induction installation among the present invention receives extraneous data with certain fixed frequency, then it is passed to signal pickup assembly, the frequency of the frequency ratio induction installation of signal pickup assembly is low, i.e. in several cycles of the every collection of induction installation, signal pickup assembly just gathers a secondary data.The induction installation of invention is the related data of monitoring field device at any time, and transfers data to signal pickup assembly with fixing frequency.But signal pickup assembly is not every group of data all to be gathered, and it has the sample frequency of oneself.Be input to control device after the processing of the treated device of data that signal pickup assembly collects, control device calls corresponding control algolithm and exports corresponding data to driving actuating unit; Drive actuating unit and control the size of flow etc. by changing the switch electric weight, like this next constantly the data that collect of signal pickup assembly namely be through the data that change; Next round still is this process.It is large that the frequency of the frequency ratio signal pickup assembly that induction installation gathers is wanted, signal pickup assembly is actually software control herein, so although the data that induction installation collects are a lot, gathered once such as 0.1 second, and signal pickup assembly may 1 second just collection once, the signal pickup assembly data of adopting are exactly that induction installation was at the 1st second, the 2nd second, the 3rd second so ... the data that collect.When the field data that collects and preset data error are in 0～0.1%, show normal; Error shows that between 0.1%～0.5% situation is unusual; Error will be called pid algorithm and provide and process suggestion more than 0.5%; Because abnormal conditions sometimes are caused by ectocine in the section a certain blink, be not real unusual, so will improve sample frequency, in time accurately determine whether is unusual on earth.In case be defined as unusually then needing to call the running that control algolithm is controlled field apparatus.
To send to the control information of control device be digital signal to treating apparatus among the present invention, as flow is added to 100 sides/minute, and this digital signal through the D/A conversion after, pass to the scene, show as switching current size and then the control electric current of control flow, flow switch is the driving actuating unit.What in fact treating apparatus referred to is exactly topworks, and the numerical information with control is reflected in the operation of concrete equipment exactly; The concrete effect of control information is the running of instructing equipment.
Control device among the present invention is divided into three kinds of situation controlled frequencies, and sample frequency of the present invention refers to the frequency of signal pickup assembly, rather than the fixed frequency of induction installation, because revise the frequency of induction installation, need make the modification on the hardware.
Among the present invention the data that receive are contrasted preset data, judge the intensity of anomaly of field condition, difference according to intensity of anomaly, by the sample frequency of control device output control signal with the control signal harvester, for example: when abnormal conditions were very serious, image data was to instruct next step how to process more continually.Thereby reach the function of control.If sample frequency is less, namely adopt the cycle longer, the abnormal data that transmit this moment might be accidental data, if determine whether genuine unusual, must improve proportion to judge whether within the denser time, still collecting abnormal data, accurately just refer to clearly to judge whether unusual mass data.When situation is unusual, gather again 1 minute, if the data that collect and preset data are more unusual, then call the running that control algolithm changes field apparatus, as without unusual, then do not make change.
The present invention can provide and process suggestion when the signal transmission abnormality, and as regulating the running of field apparatus, then next concrete proposals just need controller to adopt control algolithm control discharge capacity as increasing discharge capacity etc.
Embodiment 2:
The present embodiment applies the present invention to detect the sand amount in the pressure break truck-mounted blender system, and the structure that the sensor of the changed sample frequency in the present embodiment and embodiment 1 are identical repeats no more.
The control method detailed process of sensor that can change sample frequency in the present embodiment is as follows: time parameter is set as 1s, the flow set that preset data is sand be 20 sides/minute.The beginning receive data, the data that receive be 20.2 sides/minute, it is 1% that treated device is compared both errors, call the pid control algorithm in the control module, and the demonstration situation is unusual, simultaneously the sample frequency of signal pickup assembly is adjusted to 0.33s, continues receive data; The data that receive be 20.05 sides/minute, it is 0.25% that treated device is compared both errors, so the sample frequency of signal pickup assembly adjusts to 0.16s, the data that continue to receive behind the receive data be 20. sides/minute.
Being preferred embodiment of the present invention only in sum, is not to limit practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should belong to technology category of the present invention.
Claims (3)
1. the sensor device that can change sample frequency is characterized in that, comprises induction installation, signal pickup assembly, treating apparatus, control device and driving actuating unit;
Induction installation, it receives external data with certain fixed frequency;
Signal pickup assembly, it gathers the data that induction installation receives, and sends described data to treating apparatus;
Treating apparatus, it receives the data that signal pickup assembly sends, and sends to control device after described data are changed through amplification, filtering and A/D;
Control device receives the data that described treating apparatus sends, and described data and preset data are compared, and adjusts the sample frequency of signal pickup assembly, and calls corresponding control algolithm and output processing suggestion;
Drive actuating unit, its sample frequency after with the control device adjustment feeds back to signal pickup assembly;
Wherein,
When the external data that receives and preset data error less than 0.1% the time, keep former sample frequency constant;
When the external data that receives and preset data error 0.1%～0.5% the time, described control device is increased to original twice with the sample frequency of described signal pickup assembly;
When the external data that receives and preset data error greater than 0.5% the time, described control device is increased to original three times with the sample frequency of described signal pickup assembly.
2. the sensor device that changes sample frequency as claimed in claim 1 is characterized in that, receiving trap and dispensing device also are set; The information of transmitting between described receiving trap and dispensing device is the control information of the data that collect of adjacent sensors equipment and control sensor device duty.
3. adopt the control method that changes the sensor device of sample frequency claimed in claim 1, it is characterized in that, setting-up time parameter and preset data; Obtain external data by induction installation, signal pickup assembly receives the data that induction installation receives with default sample frequency; In treating apparatus, will send to control device after the amplification of described data process, filtering and the A/D conversion; Control device compares described data and preset data, and the acquired information state according to described information state, changes the sample frequency of signal pickup assembly and carries out information processing;
Wherein,
When the external data that receives and preset data error less than 0.1% the time, keep former sample frequency constant;
When the external data that receives and preset data error 0.1%～0.5% the time, the sample frequency of described signal pickup assembly is increased to original twice, the demonstration situation is unusual;
When the external data that receives and preset data error greater than 0.5% the time, the sample frequency of described signal pickup assembly is increased to original three times, the Graphics Processing suggestion.
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| CN 201110024869 CN102175269B (en) | 2011-01-24 | 2011-01-24 | Sensor device capable of changing sampling frequency and control method thereof |
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