CN104764611A - Vehicle start-stop monitoring method and device - Google Patents
Vehicle start-stop monitoring method and device Download PDFInfo
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Abstract
The invention discloses a vehicle start-stop monitoring method and device. Through the mode that continuous analog voltage signals on a vehicle storage battery are converted into digital signals, the start-stop state of a vehicle is judged through the comparison between the digital signals. The vehicle start-stop monitoring method and device can judge the start-stop state of the vehicle fast and accurately, the judging speed is improved effectively, the judging accuracy is guaranteed, and correct guidance can be provided for a driver.
Description
Technical field
The invention belongs to field of vehicle control, particularly a kind of vehicle start and stop monitoring method and device.
Background technology
Along with the arrival in Internet of Things epoch, car networking, as one of them new and developing branch, relies on the technology such as wireless communication technique, satellite navigation system, network communications technology and vehicle-mounted computer, has welcome the important opportunity to develop phase.Various car-mounted terminal produces thereupon, in these car-mounted terminal application processes, the functions such as route planning, run-length management, stroke statistics all need the startup to vehicle (i.e. vehicle sparking) and stop (namely vehicle stops working) to make to judge fast and accurately.
Existing car-mounted terminal is read engine speed by vehicle OBD (On-BoardDiagnostic, onboard diagnostic system) interface to confirm to the judgement of information of vehicles substantially.If engine speed information can be read from OBD interface, judge that vehicle starts, if engine speed information could not be read, think that vehicle is flame-out.
Use technique scheme slower to the judgement speed that vehicle is flame-out, if a certain moment reads less than engine speed information from vehicle, and to confirm that this state is that flameout state at least will repeat reading 3 to 5 information, all can not read engine speed information at every turn and could determine that vehicle is flameout state.But the possibility causing car-mounted terminal not read engine speed information by OBD interface has a lot, as the drive error etc. of OBD agreement, so, accurately cannot judge whether engine is in flameout state really, thus mislead driver, and cause driver to make false judgment.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of vehicle start and stop monitoring method and device, can determine vehicle start and stop state fast and accurately.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of vehicle start and stop monitoring method, comprises the steps:
Voltage signal values on analog to digital converter Real-time Obtaining vehicle battery;
According to the analog to digital converter sampling rate set and preset transform coefficient values, the voltage signal values on described vehicle battery is converted to digital signal value;
Monitor described digital signal value, if digital signal value generation rising saltus step, then vehicle is starting state, if digital signal value generation decline saltus step, then vehicle is halted state.
Preferably, according to the analog to digital converter sampling rate set and preset transform coefficient values, the step that the voltage signal values on described vehicle battery is converted to digital signal value is specially:
Biased coefficient value, gain coefficient value in preset described transform coefficient values, according to described biased coefficient value, described gain coefficient value, the voltage signal values on described vehicle battery is converted to digital signal value, the transformational relation of described digital signal value and described voltage signal values is: digital signal value=voltage signal values * gain coefficient value+biased coefficient value.
Preferably, also comprise the steps: before the voltage signal values on described continuous acquisition vehicle battery
Judge the channel type of analog to digital converter Analog signals, and judge the correcting state of the analog to digital converter when processing this channel type simulating signal; If analog to digital converter does not correct, then automatic calibration is carried out to analog to digital converter.
Preferably, the channel type of described judgement analog to digital converter Analog signals, and judge that the correcting state of the analog to digital converter when processing this channel type simulating signal comprises the steps:
Corresponding each channel type arranges corresponding assigned address respectively on the storer of analog to digital converter, 0 of assigned address or 1 numerical value is set to Data Identification, and this Data Identification is corresponding with the forward and backward state of correction of analog to digital converter during process current channel type simulation signal respectively;
Read the assigned address of described storer, according to the described assigned address determination current channel type read;
Read the Data Identification on described assigned address, and correcting state residing for analog to digital converter when determining to process current channel type simulation signal according to described Data Identification.
A kind of vehicle start and stop monitoring device comprises signal acquisition module, signal conversion module and monitoring modular; Described signal conversion module is connected with described signal acquisition module, and described monitoring modular is connected with described signal conversion module;
Described signal acquisition module, uses the voltage signal values on analog to digital converter Real-time Obtaining vehicle battery;
Described signal conversion module, the voltage signal values on described vehicle battery is converted to digital signal value according to the analog to digital converter sampling rate of setting and preset transform coefficient values by the voltage signal values on the vehicle battery described parameter acquisition module obtained;
Described monitoring modular, for monitoring the digital signal value in described signal conversion module, if digital signal value generation rising saltus step, then vehicle is starting state, if digital signal value generation decline saltus step, then vehicle is halted state.
Preferably, described signal conversion module comprises:
Parameter setting unit, biased coefficient value, gain coefficient value in preset described transform coefficient values;
Signal conversion unit, according to described biased coefficient value, described gain coefficient value, the voltage signal values on described vehicle battery is converted to digital signal value, the transformational relation of described digital signal value and described voltage signal values is: digital signal value=voltage signal values * gain coefficient value+biased coefficient value.
Preferably, the channel type identification module be connected with described signal acquisition module is also comprised;
Described channel type identification module, for judging the channel type of analog to digital converter Analog signals, and judges the correcting state of the analog to digital converter when processing this channel type simulating signal; If analog to digital converter does not correct, then automatic calibration is carried out to analog to digital converter.
Preferably, described channel type identification module comprises:
Channel type setup unit, corresponding each channel type arranges corresponding assigned address respectively on the storer of analog to digital converter, 0 of assigned address or 1 numerical value is set to Data Identification, and this Data Identification is corresponding with the forward and backward state of correction of analog to digital converter during process current channel type simulation signal respectively;
Channel type judging unit, reads the assigned address of described storer, according to the described assigned address determination current channel type read;
Correcting state judging unit, reads the Data Identification on described assigned address, and correcting state residing for analog to digital converter when determining to process current channel type simulation signal according to described Data Identification.
A kind of vehicle start and stop monitoring method provided by the present invention and device, by being converted to digital signal by continuous print analog voltage signal on vehicle battery, and by monitoring the start and stop state judging vehicle to digital signal.Vehicle start and stop monitoring method of the present invention and device can judge the state of vehicle start and stop rapidly and accurately, effectively improve judgement speed, ensure that the accuracy of judgement, can provide correct guiding to driver.
Accompanying drawing explanation
The process flow diagram of the vehicle start and stop monitoring method that Fig. 1 provides for the embodiment of the present invention one;
The process flow diagram of the vehicle start and stop monitoring method that Fig. 2 provides for the embodiment of the present invention two;
Judge in the vehicle start and stop monitoring method that Fig. 3 provides for the embodiment of the present invention two analog to digital converter receive the channel type of the simulating signal of process, and judge the process flow diagram of the correcting state of the analog to digital converter when processing this channel type simulating signal;
The schematic diagram of the vehicle start and stop monitoring device that Fig. 4 provides for the embodiment of the present invention three;
The schematic diagram of the vehicle start and stop monitoring device that Fig. 5 provides for the embodiment of the present invention four;
The schematic diagram of the vehicle start and stop monitoring device that Fig. 6 provides for the embodiment of the present invention five;
The schematic diagram of the vehicle start and stop monitoring device that Fig. 7 provides for the embodiment of the present invention six;
Fig. 8 is vehicle battery voltage signal values rising saltus step figure;
Fig. 9 is vehicle battery voltage signal values decline saltus step figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The simulating signal of continuous variable is converted to the device of discrete digital signal by analog to digital converter (Analog-to-Digital Converter, ADC).The simulating signal of real world, such as temperature, pressure, sound or image etc., need to convert the digital form more easily storing, process and launch to.A/D converter can realize this function.
The present invention utilizes analog to digital converter to carry out monitor vehicle start and stop, and this analog to digital converter is arranged in car-mounted terminal, and as shown in Figure 1, monitoring method comprises the steps:
Step 11: the voltage signal values on analog to digital converter Real-time Obtaining vehicle battery;
Wherein, analog to digital converter obtains the voltage signal values on vehicle battery in real time, in addition, one switch is set between vehicle battery and analog to digital converter, control analog to digital converter by the opening and closing of by-pass cock and whether will obtain voltage signal values on vehicle battery, namely by the opening and closing of switch control rule analog to digital converter.When needs carry out timing to analog to digital converter, only switch need be closed after vehicle battery is connected with analog to digital converter, can automatically correct analog to digital converter.
Step 12: the voltage signal values on vehicle battery is converted to digital signal value according to the analog to digital converter sampling rate set and preset transform coefficient values;
Transform coefficient values in analog to digital converter is in the nature the conversion coefficient or transformational relation function that the voltage signal values on accumulator are converted to digital signal value.Analog to digital converter is actual converted value according to the digital signal value that the voltage signal values on accumulator is converted to by its preset transform coefficient values.
Transform coefficient values comprises biased coefficient value and gain coefficient value, and the transformational relation of digital signal value and voltage signal values is: digital signal value (ADC_Value)=voltage signal values * gain coefficient value (ADC_Gain)+biased coefficient value (ADC_Offset).
Sampling rate, biased coefficient value and gain coefficient value and biased coefficient value and gain coefficient value funtcional relationship between the two can be all analog to digital converter manufactured after the default value of setting when dispatching from the factory, also can be the value to analog to digital converter sets itself.What the present embodiment was selected is factory-default.
Step 13, the digital signal value obtained in monitoring step 12, as shown in Figure 8, if digital signal value generation rising saltus step, then vehicle is starting state; As shown in Figure 9, if digital signal value generation decline saltus step, then vehicle is halted state.
In order to tackle the correction demand of analog to digital converter under complex situations more, a kind of embodiment, as shown in Figure 2, it also comprised step 10 before step 11.
Step 10: the channel type judging analog to digital converter Analog signals, and judge the correcting state of the analog to digital converter when processing this channel type simulating signal, if analog to digital converter corrects, then without the need to first automatic calibration during voltage signal values on analog to digital converter Real-time Obtaining vehicle battery; If analog to digital converter does not correct, then need first automatic calibration during voltage signal values on analog to digital converter Real-time Obtaining vehicle battery.
In this step, channel type can be one, also can be multiple, and in addition, analog to digital converter during process current channel type simulation signal can be one, can be also multiple combinations, need to determine according to actual conditions.
The channel type of simulating signal to be processed needed for analog to digital converter is different, and also needs to do different corrections for parameter relevant in the analog to digital converter of each channel type.
In the actual application of step 10, such as, in car-mounted terminal field, car-mounted terminal comprises communication port and component channel, and each passage needs the analog to digital converter module be made up of three independent analog to digital converters to process, each analog to digital converter of analog to digital converter module needs all to connect a voltage source, namely analog to digital converter module is when processing the simulating signal of communication port, need to correct each analog to digital converter in this analog to digital converter module, the analog to digital converter sketched as communication port corrects; And when processing the simulating signal of component channel, also need to correct each analog to digital converter in this analog to digital converter module, sketch as the analog to digital converter of component channel corrects, wherein, twice correction does not affect mutually, but after being through twice correction, after the simulating signal of the simulating signal of analog to digital converter module process communication port and process component channel, the consistance of data in communication port and component channel can be ensured.
It should be noted that, in trimming process each time, in analog to digital converter module, three analog to digital converters connect a voltage source respectively, namely each time in trimming process, in analog to digital converter module, three analog to digital converters all need to correct simultaneously, parameters in three analog to digital converters after correction is not necessarily identical, as long as the analog to digital converter module after correcting can reach correction target and effect.
In the present embodiment, as shown in Figure 3, step 10 comprises following concrete steps:
Step 101: corresponding each channel type arranges corresponding assigned address respectively on the storer of analog to digital converter, 0 of assigned address or 1 numerical value is set to Data Identification, and this Data Identification is corresponding with the forward and backward state of correction of analog to digital converter during process current channel type simulation signal respectively;
In a step 101, if channel type comprises channel type 1 and person's channel type 2, then corresponding assigned address 1 and assigned address 2 are set at storer, when the simulating signal of analog to digital converter treatment channel Class1, if analog to digital converter does not correct, then on assigned address 1, setting data is designated 0, if analog to digital converter is calibrated, then on assigned address 1, setting data is designated 1; In like manner, when the simulating signal of analog to digital converter treatment channel type 2, if analog to digital converter does not correct, then on assigned address 2, setting data is designated 0, if analog to digital converter is calibrated, then on assigned address 2, setting data is designated 1.
Step 102: the assigned address reading storer, according to the assigned address determination current channel type read;
Step 103: read the Data Identification on assigned address, and correcting state residing for analog to digital converter when determining to process current channel type simulation signal according to Data Identification.
In step 102 and step 103, read the assigned address of storer, in actual application, should read the assigned address on storer in order, such as, first read assigned address 1, and the Data Identification read on assigned address 1 is when being 0, judge that analog to digital converter is not also corrected when the simulating signal for the treatment of channel Class1, so when entering into step 11, connect the switch between vehicle battery and analog to digital converter, analog-to-digital conversion device carries out automatic calibration.And when reading assigned address 1, and the Data Identification read on assigned address 1 is when being 1, judge that analog to digital converter is corrected when the simulating signal for the treatment of channel Class1, so when entering into step 11, without the need to connecting the switch between vehicle battery and analog to digital converter.Then, then read next assigned address 2, and read the Data Identification on assigned address 2, then make the determining step identical with assigned address 1 and process, do not repeat them here.
The vehicle start and stop monitoring method that the embodiment of the present invention provides, by being converted to digital signal by continuous print analog voltage signal on vehicle battery, and by comparing the start and stop state judging vehicle to digital signal.Vehicle start and stop monitoring method of the present invention can judge the state of vehicle start and stop rapidly and accurately, effectively improves judgement speed, ensure that the accuracy of judgement, can provide correct guiding to driver.
Correspondingly, the embodiment of the present invention additionally provides a kind of device of vehicle start and stop, as shown in Figure 4, comprising: signal acquisition module 201, signal conversion module 202 and monitoring modular 203; Signal conversion module 202 is connected with signal acquisition module 201, and monitoring modular 203 is connected with signal conversion module 202.
Signal acquisition module 201, uses the voltage signal values on analog to digital converter Real-time Obtaining vehicle battery;
Signal conversion module 202, the voltage signal values on vehicle battery is converted to digital signal value according to the analog to digital converter sampling rate of setting and preset transform coefficient values by the voltage signal values on vehicle battery parameter acquisition module obtained;
Monitoring modular 203, for monitoring the digital signal value in signal conversion module, as shown in Figure 8, if digital signal value generation rising saltus step, then vehicle is starting state; As shown in Figure 9, if digital signal value generation decline saltus step, then vehicle is halted state.
A kind of embodiment, as shown in Figure 5, signal conversion module 202 comprises:
Parameter setting unit 301, the biased coefficient value in preset transform coefficient values, gain coefficient value;
Signal conversion unit 302, according to biased coefficient value, gain coefficient value, the voltage signal values on vehicle battery is converted to digital signal value, the transformational relation of digital signal value and voltage signal values is: digital signal value=voltage signal values * gain coefficient value+biased coefficient value.
Another embodiment, as shown in Figure 6, the device of vehicle start and stop also comprises the channel type identification module 200 be connected with signal acquisition module 201;
Channel type identification module 200, for judging the channel type of analog to digital converter Analog signals, and judge the correcting state of the analog to digital converter when processing this channel type simulating signal, if analog to digital converter corrects, then without the need to first automatic calibration during voltage signal values on analog to digital converter Real-time Obtaining vehicle battery; If analog to digital converter does not correct, then need first automatic calibration during voltage signal values on analog to digital converter Real-time Obtaining vehicle battery.
Another embodiment, as shown in Figure 7, channel type identification module 200 comprises:
Channel type setup unit 401, corresponding each channel type arranges corresponding assigned address respectively on the storer of analog to digital converter, 0 of assigned address or 1 numerical value is set to Data Identification, and this Data Identification is corresponding with the forward and backward state of correction of analog to digital converter during process current channel type simulation signal respectively;
Channel type judging unit 402, reads the assigned address of storer, according to the assigned address determination current channel type read;
Correcting state judging unit 403, reads the Data Identification on assigned address, and correcting state residing for analog to digital converter when determining to process current channel type simulation signal according to Data Identification.
The vehicle start and stop monitoring device that the embodiment of the present invention provides, by being converted to digital signal by continuous print analog voltage signal on vehicle battery, and by comparing the start and stop state judging vehicle to digital signal.This vehicle start and stop monitoring device can judge the state of vehicle start and stop rapidly and accurately, effectively improves judgement speed, ensure that the accuracy of judgement, can provide correct guiding to driver.
To sum up, content of the present invention is not limited in the above-described embodiments, and those skilled in the art can propose other embodiment easily according to guiding theory of the present invention, and these embodiments all comprise within the scope of the present invention.
Claims (8)
1. a vehicle start and stop monitoring method, is characterized in that, comprises the steps:
Voltage signal values on analog to digital converter Real-time Obtaining vehicle battery;
According to the analog to digital converter sampling rate set and preset transform coefficient values, the voltage signal values on described vehicle battery is converted to digital signal value;
Monitor described digital signal value, if digital signal value generation rising saltus step, then vehicle is starting state, if digital signal value generation decline saltus step, then vehicle is halted state.
2. vehicle start and stop monitoring method according to claim 1, is characterized in that, the step that the voltage signal values on described vehicle battery is converted to digital signal value is specially according to the analog to digital converter sampling rate set and preset transform coefficient values:
Biased coefficient value, gain coefficient value in preset described transform coefficient values, according to described biased coefficient value, described gain coefficient value, the voltage signal values on described vehicle battery is converted to digital signal value, the transformational relation of described digital signal value and described voltage signal values is: digital signal value=voltage signal values * gain coefficient value+biased coefficient value.
3. vehicle start and stop monitoring method according to claim 1, is characterized in that, also comprises the steps: before the voltage signal values on described Real-time Obtaining vehicle battery
Judge the channel type of analog to digital converter Analog signals, and judge the correcting state of the analog to digital converter when processing this channel type simulating signal; If analog to digital converter does not correct, then automatic calibration is carried out to analog to digital converter.
4. vehicle start and stop monitoring method according to claim 3, is characterized in that, the channel type of described judgement analog to digital converter Analog signals, and judges that the correcting state of the analog to digital converter when processing this channel type simulating signal comprises the steps:
Corresponding each channel type arranges corresponding assigned address respectively on the storer of analog to digital converter, 0 of assigned address or 1 numerical value is set to Data Identification, and this Data Identification is corresponding with the forward and backward state of correction of analog to digital converter during process current channel type simulation signal respectively;
Read the assigned address of described storer, according to the described assigned address determination current channel type read;
Read the Data Identification on described assigned address, and correcting state residing for analog to digital converter when determining to process current channel type simulation signal according to described Data Identification.
5. a vehicle start and stop monitoring device, is characterized in that, comprising: signal acquisition module, signal conversion module and monitoring modular; Described signal conversion module is connected with described signal acquisition module, and described monitoring modular is connected with described signal conversion module;
Described signal acquisition module, uses the voltage signal values on analog to digital converter Real-time Obtaining vehicle battery;
Described signal conversion module, the voltage signal values on described vehicle battery is converted to digital signal value according to the analog to digital converter sampling rate of setting and preset transform coefficient values by the voltage signal values on the vehicle battery described parameter acquisition module obtained;
Described monitoring modular, for monitoring the digital signal value in described signal conversion module, if digital signal value generation rising saltus step, then vehicle is starting state, if digital signal value generation decline saltus step, then vehicle is halted state.
6. vehicle start and stop monitoring device according to claim 5, it is characterized in that, described signal conversion module comprises:
Parameter setting unit, biased coefficient value, gain coefficient value in preset described transform coefficient values;
Signal conversion unit, according to described biased coefficient value, described gain coefficient value, the voltage signal values on described vehicle battery is converted to digital signal value, the transformational relation of described digital signal value and described voltage signal values is: digital signal value=voltage signal values * gain coefficient value+biased coefficient value.
7. vehicle start and stop monitoring device according to claim 5, is characterized in that, also comprises the identification module be connected with described signal acquisition module;
Described identification module, for judging the channel type of analog to digital converter Analog signals, and judges the correcting state of the analog to digital converter when processing this channel type simulating signal; If analog to digital converter does not correct, then trigger mode number converter carries out automatic calibration.
8. vehicle start and stop monitoring device according to claim 5, is characterized in that, described channel type identification module comprises:
Channel type setup unit, corresponding each channel type arranges corresponding assigned address respectively on the storer of analog to digital converter, 0 of assigned address or 1 numerical value is set to Data Identification, and this Data Identification is corresponding with the forward and backward state of correction of analog to digital converter during process current channel type simulation signal respectively;
Channel type judging unit, reads the assigned address of described storer, according to the described assigned address determination current channel type read;
Correcting state judging unit, reads the Data Identification on described assigned address, and correcting state residing for analog to digital converter when determining to process current channel type simulation signal according to described Data Identification.
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