CN102175269A - Sensor device capable of changing sampling frequency and control method thereof - Google Patents
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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 quantity of information blast.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, in fact selects 5~10 times in the engineering for use by 2 times of acquired signal highest frequency component, sometimes in order to reduce waveform preferably, in addition higher.
In actual applications, in order to make control system refinement more, can rationally tackle more abnormal conditions, the present invention considers to improve on prior art, and whether the information that perceives according to sensor device normally comes automatically to adjust the collection and the process information of sensor device.Under normal circumstances reduce so on the one hand data collection, reduce cost; Under abnormal conditions, strengthen the frequency of image data on the other hand, make appropriate judgement in the hope of obtaining more accurately information, to realize the control of self-adapted sensor device intelligence.
The sensor acquisition frequency of prior art is fixed, in case go wrong, can only adopt fixed mode to handle 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.Under normal circumstances reduce data collection, 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 is gathered the data that induction installation receives; The data that treating apparatus received signal harvester sends send to control device through amplification, filtering, A/D after changing with data; 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 control corresponding algorithm and output processing suggestion; The driving actuating unit feeds back to signal pickup assembly with the control result of control device.In addition receiving trap and dispensing device can also be set; Give adjacent sensors equipment with the data transfer that induction installation receives.
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, and error can shorten time parameter when big; After induction installation acquisition external data, signal pickup assembly receives the data that induction installation receives with frequency preset, 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 display process.
One of innovation of the present invention is to be, sample frequency can change according to the information transmitted state, 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 a traditional approach, and promptly sensor device is input to control module after the data of collection in worksite are changed through A/D.
The present invention can change the sample frequency of the whether normal automatic adjustment information harvester of information that the sensor device that adopts frequency perceives according to induction installation.Under normal circumstances reduce so on the one hand data collection, reduce cost; Under abnormal conditions, strengthen the frequency of image data on the other hand, 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 adjust the frequency acquisition of signal pickup assembly automatically and carry out information processing according to whether normal the information that perceives is, not only can optimize sensor device perception and transmission information as much as possible, 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, thereby reach the purpose of optimizing the sensor device perception and the information of transmission at on-the-spot abnormal conditions.
Description of drawings
Fig. 1 is the structural drawing that the present invention can change the sensor device of sample frequency;
Fig. 2 is a wirelessly transmitting data form synoptic 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 a 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, the data that its received signal harvester sends send to control device through amplification, filtering, A/D after changing with data; 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 control corresponding algorithm and output processing suggestion; Drive actuating unit, it feeds back to signal pickup assembly with the adjusted sample frequency of control device.Drive actuating unit the adjusted sample frequency of control device is fed 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 frequency preset; 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 display process.
The present invention also can be provided with receiving trap and dispensing device, and the data transfer that induction installation can be received is given 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 the phase intercommunication between the multi-sensor device like this, can allow and carry out the information transmission between the sensor device,, can start more sensor device with the perception scene in case a sensor device can not satisfy the demands.Sometimes enable too many sensor device and can cause the wasting of resources, though 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 synoptic diagram of transmitting information wirelessly form:
Wherein, the data head length is 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 intelligence sensor system, 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 is just gathered a secondary data.The induction installation of invention is monitored the related data of on-the-spot device at any time, and with fixing frequency data transmission is arrived signal pickup assembly.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 the control corresponding algorithm and exports corresponding data to driving actuating unit; Drive actuating unit by changing the size that the switch electric weight comes Control Flow etc., like this next constantly the data that collect of signal pickup assembly promptly be through the data that change; Next round still is this process.It is big that the frequency of the frequency ratio signal pickup assembly that induction installation is gathered is wanted, signal pickup assembly is actually software control herein, so though the data that induction installation collects are a lot, gathered once 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 handle suggestion more than 0.5%; Because abnormal conditions sometimes are caused by ectocine in the section a certain blink, be not real unusual, whether so will improve sample frequency, in time accurately being determined to the end is unusual.In case be defined as then needing to call the running that control algolithm is controlled field apparatus unusually.
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 the switching current size and then the Control 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 is meant 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, how image data should be handled to instruct next step more continually.Thereby reach the function of control.If sample frequency is less, just adopt the cycle longer, the abnormal data that transmit this moment might be accidental data, if determine whether genuine unusual, must improve and adopt frequency, accurately just be meant clearly to judge whether unusual mass data to judge whether in the denser time, still collecting abnormal data.When situation is unusual, gather 1 minute again,, then call the running that control algolithm changes field apparatus,, then do not make change as no abnormal if data that collect and preset data are more unusual.
The present invention can provide and handle 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:
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 at 1s, the flow set that preset data is sand be 20 sides/minute.Begin to 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 to 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, continue to receive the data that receive after the data and be 20. sides/minute.
Being preferred embodiment of the present invention only in sum, is not to be used for limiting 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 (6)
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, the data that its received signal harvester sends send to control device through amplification, filtering, A/D after changing with described data;
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 control corresponding algorithm and output processing suggestion;
Drive actuating unit, it feeds back to signal pickup assembly with the adjusted sample frequency of control device.
2. the sensor device that changes sample frequency as claimed in claim 1 is characterized in that, receiving trap and dispensing device can also be 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 described control method that changes the sensor device of sample frequency of 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 frequency preset; 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, and the acquired information state according to described information state, changes the sample frequency of signal pickup assembly and carries out information processing.
4. the control method that changes the sensor device of sample frequency as claimed in claim 3 is characterized in that, when the external data that receives and preset data error 0~0.1% the time, keep former sample frequency constant.
5. the control method that changes the sensor device of sample frequency as claimed in claim 3, it is characterized in that, 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.
6. the control method that changes the sensor device of sample frequency as claimed in claim 3, it is characterized in that, 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 display process suggestion.
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