CN103697983A - Vehicle-mounted weighing data processing method - Google Patents
Vehicle-mounted weighing data processing method Download PDFInfo
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- CN103697983A CN103697983A CN201310718343.7A CN201310718343A CN103697983A CN 103697983 A CN103697983 A CN 103697983A CN 201310718343 A CN201310718343 A CN 201310718343A CN 103697983 A CN103697983 A CN 103697983A
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Abstract
The invention discloses a vehicle-mounted weighing data processing method, comprising the following steps of (1) collecting load data measured by a sensor and performing filter processing; (2) processing the filtered data by adopting a track processing method and ensuring the data stability; (3) judging whether a vehicle is started, if yes, switching a filtering and tracking parameter to a dynamic filtering cut-off frequency and a dynamic tracking speed rate, otherwise switching the filtering and tracking parameter to a static filtering cut-off frequency and a static tracking speed ratio, then repeating the steps (1)-(3). The data processing method is used for eliminating the interference of vehicle factors, road factors and environment factors to the weighing result of a vehicle-mounted weighing system, so the stability and accuracy of the weighing result are ensured.
Description
Technical field
The present invention relates to a kind of vehicle-mounted method for processing weighing data, particularly, by gathering the measurement data of vehicle-mounted LOAD CELLS, realize the data processing method of cargo weight measurement.
Background technology
Vehicle-mounted weighing system, is mainly the upper sensor installation of stressed member (parts such as axletree, leaf spring) at vehicle, measures the stress deformation situation of these parts, realizes the measurement of cargo weight.Lade weight is larger, the distortion of stressed member is larger, the output signal of sensor is also just larger, but the complicacy due to vehicle structure, the output signal of sensor can be subject to the impact of following two aspect disturbing factors: in (one) driving process, the factors such as vehicle-state (brake, turn to, acceleration and deceleration, reversing etc.), condition of road surface (climb and fall, jolt etc.), temperature variation cause stressed member distortion to change; (2) after stopping, the distortion of stressed member recovers, if therefore directly calculate cargo weight by the output signal of sensor, certainly exist relatively large deviation, the impact how above-mentioned vehicle factor, Road Factor, environmental factor being caused eliminates, and guarantees the stable of weighing results and is accurately the major issue that hinders vehicle-mounted weighing system development.
Summary of the invention
The invention discloses a kind of vehicle-mounted method for processing weighing data, the interference that this data processing method causes vehicle-mounted weighing system weighing results for eliminating vehicle factor, Road Factor, environmental factor, guarantees the stable of weighing results and accurately.
The technical solution used in the present invention is:
A vehicle-mounted method for processing weighing data, comprises the following steps: the measuring-signal of (1) pick-up transducers output, then carries out filtering processing; (2) adopt tracking processing method to process filtered data, guarantee the stable of data; (3) judge whether vehicle starts, if vehicle launch, switch filtering and tracking parameter to dynamic filter cutoff frequency and dynamic following rate, and in follow-up circulation, adopt dynamic filter cutoff frequency and dynamic following rate to process, otherwise switch filtering and tracking parameter to Static Filtering cutoff frequency and static following rate and adopt Static Filtering cutoff frequency and static following rate to process in follow-up circulation, then repeating step (1) is to step (3).
In such scheme, whether vehicle starts is that the engine speed of vehicle or the speed of a motor vehicle realize by detecting.
In such scheme, the Filtering Model of step (1) is infinite impulse response digital filter or finite impulse response digital filter.
In such scheme, the filtering in step (1) refers to that rejection frequency is greater than dynamically or the undesired signal of Static Filtering cutoff frequency.
In such scheme, the concrete steps of described tracking processing method are: compare the rate of change of sensor measurement data, if the rate of change of measurement data is less than following rate, export the last time data of sensor, if the rate of change of measurement data is greater than following rate, export current measurement data.
Above-mentioned following rate refers to the predefined minimum response threshold for goods weight rate of change, and the data variation speed of sensor is greater than this following rate loading goods and causes, and being less than this following rate is that disturbing factor causes.
In such scheme, dynamic filter cutoff frequency is the minimum change frequency of sensor measurement data that in driving process, vehicle-state, condition of road surface cause, and is 0.0005-0.05Hz.
In such scheme, Static Filtering cutoff frequency is the minimum change frequency of sensor measurement data that under halted state, Vehicular vibration, Environmental variations cause, and is 0.05-1Hz.
Compared with prior art, vehicle-mounted method for processing weighing data of the present invention at least has the following advantages: 1, the measurement data of the vehicle-mounted method for processing weighing data Real-time Collection of patent of the present invention sensor, then the measurement data of sensor is carried out filtering and followed the tracks of and process, finally according to vehicle, whether start and switch filtering and tracking parameter, so, the inventive method is under the prerequisite of weighing precision that does not affect dead ship condition vehicle-mounted weighing system, eliminate the impact that vehicle factor, road conditions factor and Environmental variations cause, guarantee the stable and accurate of weighing results; 2, disposal route clear logic of the present invention, practical.
Embodiment
The invention provides a kind of vehicle-mounted method for processing weighing data, comprise the following steps:
(1) the load-carrying data that pick-up transducers is measured, then carry out filtering processing; Described infinite impulse response digital filter (iir digital filter) or the finite impulse response digital filter (Finite Impulse Response filter) of being filtered into; In vehicle movement process, described filtering refers to that rejection frequency is higher than the undesired signal of dynamic filter cutoff frequency, and under vehicle stop state, described filtering refers to that rejection frequency is higher than the undesired signal of Static Filtering cutoff frequency;
(2) adopt tracking processing method to process filtered data, guarantee the stable of data; Described tracking processing method is: compare the rate of change of sensor measurement data, if the rate of change of measurement data is less than following rate, export the last time data of sensor, if the rate of change of measurement data is greater than following rate, export current measurement data; Described following rate refers to the predefined minimum response threshold for goods weight rate of change, unit, Kg/s.
(3) judge whether vehicle starts, if vehicle launch, switch filtering and tracking parameter to dynamic filter cutoff frequency and dynamic following rate processing with this filtering cutoff frequency and following rate in follow-up circulation, otherwise switch filtering and tracking parameter to Static Filtering cutoff frequency and static following rate and with this filtering cutoff frequency and following rate, process in follow-up circulation; Whether vehicle starts is that the engine speed of vehicle or the speed of a motor vehicle realize by detecting.
(4) repeat above step.
Below in conjunction with embodiment, the invention will be further described.
Embodiment mono-: the heavily card of dead weight capacity 15t of take is example, vehicle-mounted method for processing weighing data is described, the dynamic filter cutoff frequency arranging in driving process is 0.001Hz, dynamically following rate is 30Kg/s, Static Filtering cutoff frequency under halted state is 0.1Hz, and static following rate is 1Kg/s.
Under static state, while loading the heavy goods of 10t, stressed member deforms, and it is large that sensor output signal becomes, and the output signal of pick-up transducers is first greater than the undesired signal of 0.1Hz with the method rejection frequency of digital filtering, obtain goods weight 10t; Second step is followed the tracks of processing, during due to loading goods, the rate of change of sensor output signal is greater than 1Kg/s, follow the tracks of to process and can not cause the distortion of data, the 3rd step judges whether vehicle starts, if vehicle launch, it is 0.001Hz that this method is switched filtering cutoff frequency, following rate is 30Kg/s, the random interfering signal producing with the vibration of this filtering engine, road bump, turn inside diameter and brake.
After vehicle stop, switching filtering cutoff frequency and following rate is 0.1Hz and 1Kg/s, the now distortion recovery of stressed member can cause the slow variation of measuring gross weight, its filtering is processed rear its rate of change and is less than 1Kg/s, this method is processed elimination by tracking, and these slowly change, and guarantee the stable output of 10t, if unloading, the rate of change of measurement data is greater than 1Kg/s, and this method is exported current true goods weight.
In such scheme, this method realizes by detecting engine speed or the speed of a motor vehicle of vehicle the judgement whether vehicle moves,
In such scheme, filtering method can be that infinite impulse response digital filter (iir digital filter) can be also finite impulse response digital filter (Finite Impulse Response filter).
In such scheme, turn inside diameter, brake, parking, acceleration and deceleration, reversing, climb and fall, jolt in process, the minimum change frequency of measurement data is 0.001Hz, therefore dynamic cut-off frequency being set is 0.001Hz, after filtering is processed, the rate of change of data is 30Kg/s to the maximum, and therefore dynamic following rate being set is 30Kg/s.
In such scheme, under vehicle stationary state, undesired signal frequency that physical environment causes is minimum is 0.1Hz, therefore static filtering cutoff frequency being set is 0.1Hz, distortion recovery due to stressed member, rear measurement result is processed in filtering still can there is slow variation, and its speed is 1Kg/s to the maximum, and therefore following rate being set is 1Kg/s.
Claims (7)
1. a vehicle-mounted method for processing weighing data, is characterized in that: comprise the following steps:
(1) measuring-signal of pick-up transducers output, then carries out filtering processing;
(2) adopt tracking processing method to process filtered data, guarantee the stable of data;
(3) judge whether vehicle starts, if vehicle launch switch filtering and tracking parameter to dynamic filter cutoff frequency and dynamic following rate, otherwise switching filtering and tracking parameter is to Static Filtering cutoff frequency and static following rate;
(4) with the definite filtering cutoff frequency of step (3) and following rate repeating step (1) to step (3).
2. a kind of vehicle-mounted method for processing weighing data according to claim 1, is characterized in that: described step (1) be filtered into infinite impulse response digital filter or finite impulse response digital filter.
3. a kind of vehicle-mounted method for processing weighing data according to claim 1 and 2, is characterized in that: described in vehicle movement process, the filtering in described step (1) refers to that rejection frequency is higher than the undesired signal of dynamic filter cutoff frequency; Under the state of vehicle stop, the filtering in described step (1) refers to that rejection frequency is higher than the undesired signal of Static Filtering cutoff frequency.
4. a kind of vehicle-mounted method for processing weighing data according to claim 1, it is characterized in that: the concrete steps of described tracking processing method are: the rate of change that compares sensor measurement data, if the rate of change of measurement data is less than following rate, export the last time data of sensor, if the rate of change of measurement data is greater than following rate, export current measurement data.
5. a kind of vehicle-mounted method for processing weighing data according to claim 1, is characterized in that: whether described vehicle starts is that the engine speed of vehicle or the speed of a motor vehicle realize by detecting.
6. a kind of vehicle-mounted method for processing weighing data according to claim 1, it is characterized in that: described dynamic filter cutoff frequency is that in driving process, vehicle-state, condition of road surface cause the minimum change frequency of sensor measurement data, for 0.0005-0.05Hz, dynamically tracking velocity is in driving process, the maximum rate of change of weighing data after allowing filtering to process, for 10Kg/s is to 2000Kg/s.
7. a kind of vehicle-mounted method for processing weighing data according to claim 1, it is characterized in that: described Static Filtering cutoff frequency is that under dead ship condition, Vehicular vibration, Environmental variations cause the minimum change frequency of sensor measurement data, for 0.05-1Hz, static following rate is under dead ship condition, the maximum rate of change of weighing data after allowing filtering to process, for 0.5Kg/s is to 10Kg/s.
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| CN201310718343.7A CN103697983B (en) | 2013-12-23 | 2013-12-23 | A kind of vehicle-mounted method for processing weighing data |
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| CN201310718343.7A CN103697983B (en) | 2013-12-23 | 2013-12-23 | A kind of vehicle-mounted method for processing weighing data |
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Cited By (4)
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| CN104270398A (en) * | 2014-10-28 | 2015-01-07 | 上海耀华称重系统有限公司 | Method for digital weighing system for preventing decoding data |
| CN111774113A (en) * | 2020-06-30 | 2020-10-16 | 马良 | Anti-interference moving and fixing device |
| CN112734613A (en) * | 2020-12-16 | 2021-04-30 | 铁虎 | Weighing data processing method, device and system applied to garbage classification weighing |
| CN113758551A (en) * | 2021-08-02 | 2021-12-07 | 重庆伟志测控技术有限公司 | Weighing method of load-carrying truck with anti-vibration function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270398A (en) * | 2014-10-28 | 2015-01-07 | 上海耀华称重系统有限公司 | Method for digital weighing system for preventing decoding data |
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| CN112734613A (en) * | 2020-12-16 | 2021-04-30 | 铁虎 | Weighing data processing method, device and system applied to garbage classification weighing |
| CN113758551A (en) * | 2021-08-02 | 2021-12-07 | 重庆伟志测控技术有限公司 | Weighing method of load-carrying truck with anti-vibration function |
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