JPH03282988A - Data storage device using memory card - Google Patents

Abstract

PURPOSE:To make it possible to store data and continuously sample data even when there is no data backup time by storing read traveling data in a memory card. CONSTITUTION:A CPU 151 is controlled by a program built in a program ROM 153 and fetched data are stored in a built-in RAM 155 for a temporary buffer and then stored in the memory card 156. The card 156 can be inserted/ejected into/from a data storage device body and has the storage capacity of about one megabyte(MB) consisting of an S-RAM, and when the card 156 is full with data, the card 156 can be replaced by another card. Even when the card 156 is ejected from the body, the data stored in the card 156 are backed up by a battery and still stored. Thereby, much data can be sampled by exchanging cards.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides an I/O device that reads data during driving of a vehicle and is detachable.
This relates to a data storage device that is stored in a C card (memory card), and based on that information (data), vehicle engine development, engine tuning for racing cars, etc., improvement and development of engine-related equipment, fuel oil, oil, etc. It is possible to contribute to

[Conventional technology]

Generally, in order to develop a vehicle engine, etc., it is necessary to collect a lot of different data in parallel over a long period of time, such as data during driving, such as engine rotation speed, vehicle speed, acceleration, and fuel consumption.

Conventionally, various data storage devices have been developed as means for reading such a plurality of data, converting it into a database, and storing it.

[Problem to be solved by the invention]

However, in order to collect data while the vehicle is running, it is necessary to mount a data storage device on the vehicle, and for this purpose, the data storage device needs to be portable and small. Particularly when collecting data while a racing car is running, the racing car needs to be as light as possible in order to increase its speed, so it needs to be not only small but also lightweight. However, with conventional small data storage devices, it is difficult to store large amounts of data due to the small data storage capacity, and when trying to collect large amounts of data at high speed, the remaining memory capacity of the memory runs out and the next measurement is started. It is necessary to back up the data in preparation for the future, and there is a problem in that data collection is interrupted and the validity of the data is lost.

The present invention is intended to solve the above-mentioned problems, and even when there is no time to back up data because a large amount of data is collected, such as data when a vehicle is running, data can be saved and data can be collected continuously. The object of the present invention is to provide a data storage device using a memory card that can perform the following steps.

[Means for Solving the Problems] To this end, a data storage device using the memory card of the present invention is installed in a vehicle and records a plurality of driving data such as engine speed and fuel consumption at a predetermined sampling period. Equipped with a data storage device that sequentially reads and stores data, and a memory card that is removable from the data storage device,
The device is characterized in that the loaded driving data is stored in a memory card.

[Effect]

The present invention enables a removable battery-backed memory card to be attached to the main body of the data storage device, stores read data in the memory card, and when the memory becomes full, simply replaces the card to continuously collect data. Moreover, even if the card is removed, the data is saved due to battery backup, so even when collecting a large amount of data at high speed, such as when a racing car is running, all data can be saved. Data can be processed at any time to contribute to data analysis.

〔Example〕

Although the present invention is applicable to any case where a large amount of data is continuously collected, an example will be described below in which the system is installed in a racing car and data is collected.

FIG. 1 is a block diagram showing the configuration of an embodiment of the data storage device of the present invention applied to a racing car, and FIG. 2 is a diagram for explaining attachment and detachment of the data storage device main body and a memory card. . In the figure, 100 is the main body of the data storage device, 101 is the ignition signal detector, 103 is the proximity switch, 1
05 is a linear potentiometer, 107 is a pressure sensor, 109 is a positive displacement flowmeter, 111 is a resistance temperature sensor, 113
a is a wide range oxygen sensor, 113b is a thermocouple, 117a is a pressure gauge, 117b is a shunt resistor, 119a is an acceleration sensor, 119b is an orientation sensor, 119c is an inclination sensor, 121 is an infrared emitter, 123 is an infrared receiver ,1
25, 127, 129 is an F/V converter, 131 is a counter, 133 is an I/V converter, 135, 137, 139 is a linearizer, 141 is a measurement start/stop switch, 14
3 is memory counter clear/reset switch, 145
1 is a recording method selection switch, 147 is an analog data selector, 149 is an A/D converter, 151 is a CPU, 1
53 is ROM, 155 is RAM.

156 is a memory card, 157 is a reference clock oscillator,
159 is a counter, 160 is a time counter, and 161 is an external digital display.

As shown in FIG. 2, the data storage device main body 100 includes a display 161 that displays various data using, for example, a liquid crystal display.
and a keyboard of 163, with a handy type of 150
The size is approximately 180 x 50 mm, and it is waterproofed and uses cushioning materials to prevent vibrations.
I try to store it in a sturdy and sturdy case. Power is received from the vehicle's battery, and DC is used to prevent malfunction.
- Isolate using a DC converter, etc. The main body of the data storage device consists of a 5-RAM, and a memory card 156 for driving and backup with battery backup is removable.

In FIG. 1, the racing car is equipped with various sensors to detect the running state. Measurement by these sensors is started/stopped by a switch 141, and at the same time as the measurement starts, for example, an ignition signal is detected. Vessel 101
detects the engine speed in a non-contact manner in the range of 0 to 12,000 rpm and outputs a signal accordingly. The proximity switch 103 detects the rotation speed of the drive shaft in the range of 0 to 300 km/h and sends out a vehicle speed signal. The linear potentiometer 105 measures the throttle opening in the range of 0 to 50.

The pressure sensor 107 measures pressure in the range of 0 to 15 psi using a differential pressure detection type detector that can be used for general purpose purposes, such as measuring vehicle speed using an intake pipe vacuum or a pitot tube. Although it is a differential pressure detection type, it can also be used for vehicle speed detection using, for example, a pitot tube. The positive displacement flow meter 109 measures the amount of fuel supplied and the amount of fuel returned, and based on the difference between them, the amount of fuel consumed is measured in the range of 0 to 60 cc/sec. In addition, the fuel consumption is
It is integrated by the counter 131 and read directly by the CPU as integrated consumption data. RTD 1
11 measures, for example, intake air temperature, water temperature, oil temperature, etc. in the range of 0 to 200°C. Wide area ff [elementary sensor 11
3a measures the air-fuel ratio by measuring the oxygen concentration while keeping the ambient temperature of the sensor constant. In this embodiment, since the racing car is of a type in which the engine is mounted separately on the left and right sides, the air-fuel ratio is measured for the L bank and the R bank, respectively. The thermocouple 113b measures the exhaust gas temperature in the range of 0 to 900°C for the L bank and the R bank.

Reference numeral 117a measures the battery voltage with a voltmeter, and uses an isolation amplifier in the range of 0 to 2 OA with a shunt resistor 117b to remove the influence of noise and measure the current consumption. The acceleration sensor 119a measures acceleration in the traveling direction and the lateral direction within a range of ±20G.

The orientation sensor 119b uses, for example, a Hall element compass and measures all directions from 0 to 360 degrees. The tilt sensor 119C measures the tilt in the traveling direction and the lateral direction within a range of ±70 degrees.

Of the data measured by these sensors, the engine speed, vehicle speed, fuel consumption, and air-fuel ratio (I/V conversion) are detected as pulses, so they are converted to voltage values using an F/V converter, and other data are detected as pulses. Since the detected data is a voltage value, it is directly sampled at a predetermined period through the analog data selector 147.

In this case, the engine speed, vehicle speed, throttle opening, pressure, and acceleration change drastically due to ultra-high speed driving, so 0.
The data is sampled at a 1 sec period, and other data is sampled at a 1 sec period because changes are relatively slow compared to these data or the response of the sensor is not so fast. The data thus sampled at a 0°1 second cycle or a 1 second cycle is converted into a digital quantity by the A/D converter 149 and is taken into the CPUI 51. C
The PU 151 is controlled by a program built into the program ROM 153, and the fetched data is stored in the built-in RAM 155 for instantaneous buffering, and stored in the memory card 156 in a format described later by specifying an address. The memory card 156 is removable from the main body of the data storage device,
It has a storage capacity of about 1 megabyte consisting of 5-RAM, and when the memory becomes full, you can replace it with another card, and even if you remove it from the data storage device, it has battery backup, so you can store data for more than a year. Can be saved. Therefore, a large amount of data can be collected by replacing the card. The contents of the memory card are then selected and the latest data values are displayed on the external digital display 161 at any time. The clock signal of the reference clock oscillator 157 is input to the CPUI 51, and the time is input to the time counter 160, and the clock signal is input to the CPU 51.
At 9, lap times are measured.

In addition, you can clear/clear memory, counters, and address counters.
Reset is performed by the switch 143, and the power is turned off so that the memory can be used effectively in preparation for long-term measurements.
Even when the device is turned off, the values in the memory and counter are retained, and when the power is turned on again and the switch 141 is pressed, measurements can continue instantaneously. Furthermore, when the memory becomes full, a recording method selection switch 145 allows selection of whether to stop measurement, to drain data, or to overwrite data.

Furthermore, in this embodiment, as shown in FIG. 6, an infrared emitter 121 is arranged at a predetermined position on a pit road 173 of a course 170, and an infrared receiver 123 is mounted on the racing car. Infrared rays from the infrared light emitter 121 are detected every time it goes around. In this embodiment, the lap time is taken into the CPUI 51 by an interrupt as the data that passed through the reference position when this was detected.
It is written to the memory card 156 as one of the measurement data. Note that tungsten light may be used in addition to an infrared emitter, and an ultrasonic transmitter/receiver may be used instead of an infrared emitter/receiver.

Next, storage of one second worth of data will be explained with reference to FIG. In the diagram, REV is engine speed, SPD is vehicle speed, TH
R is throttle opening, PH1 is pressure, ACX is acceleration in the forward direction, ACY is lateral acceleration, AFL is L bank average air-fuel ratio, AFR is R bank average air-fuel ratio, LPT is lap time, and is L bank average exhaust gas temperature. , TER is R bank average exhaust gas temperature, TSA is intake air amount, VLT is battery voltage, AMP is current, FLT is fuel consumption rate, D
IR is the direction, GRX is the inclination in the traveling direction, GRY is the inclination in the lateral direction, FLC is the cumulative fuel consumption, and CLK is the clock time.

Here, FLC is used to measure fuel consumption.
It is a counter value that is incremented every cc, and FL
Since there is a possibility that errors may accumulate when T is integrated, a separate counter 131 is used for counting. CLK is a counter value that is incremented every second to represent the measurement time, and is stored in memory in units of one second up to 11:59:59. Also, LPT is the time between reference positions (
This is a counter value that measures the lap time by incrementing it every 0.01 seconds, and when a flag indicating that the reference position passing signal has been received is raised, the count value at that time is read and written to the memory card. , the counter is reset.

As mentioned above, the data to be imported is 0. 1 second period and
There is one with a period of 1 second, and each data consists of 2 bytes. REV, SPD, THRSPR every 0.1 seconds
3SACXSACYSAFL.

APR and LPT data are taken in sequentially, and after 1 second, in addition to these data, 5TER is added.

TSA, VLTSAMPSFLTSDIR, GRX, G
Take in RYSFLC, CLK (7) f-9.

Note that LPT is treated as sampling data every 0.1 seconds, and if the flag indicating that the reference position signal has been received is not set, O is written and the data is divided into laps. .

The total data for one second is considered to be one set, and the number of data in one data set is 101, the capacity is 202 bytes, and the number of data in one data set is 101.
It is 616 bits. Therefore, if the memory capacity is 1 megabyte, the continuous recording time is about 1 hour and 27 minutes.

Next, the data storage area in the memory card will be explained with reference to FIG.

REV, SPD, THRSPR3゜ACX every 0.1 seconds
, ACYSAFL, APR%LPT, the data is stored in order of earliest channel and time, and thereafter, it is stored in the storage area of the memory card 2 bytes at a time in the same order. And since the 1 second periodic sampling data will also be imported with the 10th sampling data,
The corresponding data will be added.

Further, when the car passes through the reference position and the infrared receiver receives the reference position signal, an interrupt is generated in the CPU, a flag is set, and the LPT data at that time is fetched and stored. Therefore, by seeing that the LPT value has been written, it is possible to see at a glance which lap the huge amount of data is for and the lap time of the -lap at that time.

In addition, data that changes at a high speed and data that changes slowly depending on the data are captured by changing the sampling period, so it does not take in more data than necessary, and it also allows you to capture data that changes quickly and slowly. Sufficient data can be captured.

If the data storage device main body 100 is equipped with a data transfer device 200 such as R3232C as shown in FIG.
The data can be transferred from the computer to a personal computer 203, etc., and subjected to various processing such as graphing the data. It should be noted that if GP-IB is used as a transfer device, the transfer speed can be increased, and since R3232C is equipped as standard in personal combinators, its versatility can be utilized.

In the above embodiment, data collection during driving of a racing car has been described, but the invention is applicable not only to racing cars but also to any case where a large amount of data is collected, such as collection of test data of a normal vehicle.

〔Effect of the invention〕

As described above, according to the present invention, by using a removable memory card in the main body of the data storage device as a data storage medium, the data storage device can be miniaturized because it requires the same space as using a normal IC. It can be used to collect data continuously by simply replacing the card, and it can also be used to store large amounts of data at high speeds, such as racing car driving data.
Furthermore, even if the car is subject to strong vibrations, there will be no problem as there are no moving parts in the read/write section of the memory card.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment in which the data storage device of the present invention is applied to a racing car, FIG. Figure 3 is a diagram to explain the acquisition of one second worth of data, Figure 4 is a diagram to explain the data storage area in RAM, Figure 5 is a diagram to explain data transfer, and Figure 6 is a diagram to explain the data storage area in RAM. FIG. 3 is a diagram for explaining a reference position on a racing course. 100...Data storage device main body, 121...Infrared emitter, 123...Infrared receiver, 151...cp
u. 156...Memory card, 161...External digital display. Applicant Tonen Corporation

Claims (2)

[Claims] (1) A data storage device installed in the vehicle that reads and stores multiple driving data such as engine speed and fuel consumption in chronological order at a predetermined sampling period, and a data storage device that can be detached from the data storage device. 1. A data storage device using a memory card, characterized in that the data storage device is equipped with a memory card and stores read driving data in the memory card. (2) The data storage device using a memory card according to claim 1, wherein the data storage device is mounted on a racing car and stores data during driving on a memory card.