DE102009014128A1 - Carrying device e.g. laptop, for use in land vehicle i.e. sporty motor vehicle, has display unit displaying threshold region as Kamm's circle and values of acceleration transmitted by computing unit - Google Patents

Abstract

The device (101) has an acceleration sensor system, a computing unit and a display unit (107), where values of acceleration are determined by the acceleration sensor system, processed by the computing unit and transmitted to the display unit. The display unit displays a threshold region as a Kamm's circle and values of acceleration transmitted by the computing unit. The display unit indicates concentric circles inside the Kamm's circle. The computing unit is formed by a microcontroller (105). An Universal serial busconnection and a loudspeaker are provided in the device. Independent claims are also included for the following: (1) a method for measuring and indicating acceleration of a vehicle (2) a method for recognizing tilting of a vehicle (3) a method for determining vehicle load of a vehicle.

Description

The The invention relates to a carry-along device, in particular for use in a vehicle, wherein the entrainment device is an acceleration sensor system, a Computing unit and a display unit, wherein on the Acceleration sensor system values of the acceleration determined and processed by the arithmetic unit and transmitted to the presentation unit become.

The Recording driving values, in particular acceleration values, is used for many years by professional racing teams in particular performed in Formula 1. Different sensors are permanently installed in the race car. These Sensors deliver during a race measured values, which off the racetrack by means of computer systems be evaluated and recorded.

aim These evaluations and records are the race behavior to improve the driver. For example, the driver is after a test run about it Informs in which curves he drives at what speeds can.

A possible Representation of the acceleration values can be done by means of a comb Circle done. Such a Kamm circle is an idealized one Representation of braking and cornering forces on the wheel of a vehicle. The radius describes the maximum achievable total force. expects If the mass is deduced from this total force, then the radius describes the maximum achievable acceleration.

Beyond the Radius out accelerations, this can lead to the tires lose grip to the ground and speed for one Curve is too high.

analog For example, applies when accelerating, in which too much force lead to the tire can make the tires go crazy. To prevent this, will be in modern vehicles when braking anti-lock braking systems and while accelerating Anti-slip control systems used. In the racing sector, however, is often dispensed with such systems. This means for the Driver that he needs to know the limits of his vehicle.

in the Amateur area, the driver has to learn little by little his limits. It can be an overshoot borders have catastrophic consequences.

task The invention is to improve the state of the art.

Is solved the task by a Mitführgerät, in particular for use in a vehicle, wherein the entrainment device is an acceleration sensor system, a computing unit and a display unit, wherein on the Acceleration sensor system values of the acceleration determined and processed by the arithmetic unit and transmitted to the presentation unit be, wherein the presentation unit a border area and by transmitted the arithmetic unit Displays values of the acceleration.

Thereby The driver can advantageously information while driving information in terms of of the acceleration values and the limit range.

moreover he can advantageously faster to the limits of Kammschen Circle, as the reserves indicated by the Mitführgerät him become.

moreover can thus be a compact device be provided, which in different vehicles can be used. Due to the handiness of Mitführgerätes Mitführgerät can easily transported from one to the other vehicle and set up in this become.

• Der Begriff „Fahrzeug” umfasst sämtliche Formen von Fahrzeugen zu Land, zu See und in der Luft. Dabei sind insbesondere Automobile, Lastkraftwagen, Motorräder, Boote, Schiffe und Flugzeuge umfasst.
• Der Begriff „Mitführgerät” umfasst insbesondere Laptops, Minilaptops, PDA's, Mobiltelefone, Navigationsgeräte, MP3-Player und sonstige handliche elektronische Vorrichtungen, welche leicht durch eine Person mitgeführt werden können.
• „Beschleunigungssensorsysteme” umfassen sämtliche Sensoren, mit denen Beschleunigungen ermittelt werden können. Die Signale dieser Sensoren können insbesondere mittels einer Signalkonditionierung aufbereitet sein. Weiterhin können diese Beschleunigungssensorsysteme Beschleunigungssensoren für zwei oder drei Raumrichtungen aufweisen.
• Als „Recheneinheit” sind alle Mittel zu verstehen, welche elektronische Eingangsdaten in Ausgangsdaten umwandeln können. Insbesondere sind Mikrocontroller umfasst.
• Die „Darstellungseinheit” kann sämtliche Anzeigen und Displays umfassen, welchen der Fahrer Informationen über aktuelle Beschleunigungswerte entnehmen kann.
• Der „Grenzbereich” legt für bestimmte Raumrichtungen spezielle Beschleunigungswerte fest. Diese festgelegten Beschleunigungswerte können von außen vorgegeben oder dem Mitführgerät übermittelt worden sein. Sie müssen nicht den tatsächlichen physikalischen Grenzen entsprechen, sondern können abhängig vom Wunsch des Benutzers darunter liegen.

First of all, the following is explained conceptually:

• The term "vehicle" includes all forms of vehicles by land, sea and air. In particular, automobiles, trucks, motorcycles, boats, ships and aircraft are included.
• The term "entrainment device" includes in particular laptops, mini-laptops, PDAs, mobile phones, navigation devices, MP3 players and other handy electronic devices, which can easily be carried by a person.
• "Acceleration sensor systems" include all sensors with which accelerations can be determined. The signals of these sensors can be prepared in particular by means of a signal conditioning. Furthermore, these acceleration sensor systems can have acceleration sensors for two or three spatial directions.
• "Computing unit" means all means that can convert electronic input data into output data. In particular, microcontroller is included.
• The "presentation unit" can include all displays and displays, which the driver can take information about current acceleration values.
• The "limit range" defines specific acceleration values for certain spatial directions. These specified acceleration values may be predetermined externally or transmitted to the entrainment device. They do not have to correspond to the actual physical limits, but can depend depending on the desire of the user lying underneath.

in the Further advantageous embodiments of the invention will be described.

Around for a Vehicle can represent a certain border area, in one embodiment this boundary area can be represented as a Kamm circle.

In a form of expression of the invention, the Mitführgerät a Have speakers. about This speaker may exceed the Boundary an audible signal sound.

Around an assessment the acceleration reserves, the presentation unit further concentric with respect to Kamm's circle inside Have circles. So an achieved acceleration value can be better be read by the driver.

Around to obtain a fast evaluation of the acceleration sensor system, a microcontroller can form the arithmetic unit.

Around the acceleration sensor data to process the Mitführgerät a Have analog-to-digital converter, which advantageously both a signal evaluation and a signal processing include can.

In another form of expression Can the Mitführgerät a USB port. This can advantageously data off or on the carry-along device be read.

Around the microcontroller the data over the Kamm circle available to provide or to store data, the Mitführgerät a volatile Have memory.

Around inexpensive To insert components, a RAM memory can be volatile Form memory.

In another form of expression of the invention, the Mitführgerät a Have read only memory. In such a memory can be more advantageous Way software for the microcontroller or certain data stored permanently.

Around a cost-effective To use a component as a fixed memory, a flash ROM memory and / or a flash data store form the read-only memory.

Around the brightness of the display unit to the ambient light conditions adapt, the Mitführgerät a brightness control exhibit.

In another form of expression According to the invention, the entrainment device can be input means exhibit. This can advantageously drive the driver certain menu items or initiate actions on the carry-along device. As input means can in particular Tochscreens be used.

Around to ensure a simple realization of the input means can one two three four five or more keys forming the input means.

In a further embodiment a joystick can form the input means. In particular, this joystick can all functionalities be realized so that no buttons are to be used. Also The joystick can be used parallel to the buttons.

Around to compare determined acceleration data with route profiles, the carry-along device can be positioning means which in particular has a GPS or other satellite Location and / or navigation system include.

In another expression According to the invention, the entrainment device can be set up in this way be that the presentation unit is omitted. This allows the Mitführgerät particular in transport containers or in goods to be transported be housed during of transport the accelerations acting on the cargo record. In particular, this can be a very cost-effective variant be made of Mitführgerätes.

Farther the task is solved by a method for measuring and displaying the acceleration of a Vehicle, wherein in the vehicle a Mitführgerät - as previously described was - located is.

Thereby Advantageously, a vehicle tuner can be the result of his work determine or get a racer information about engine performance. Furthermore you can These values are also saved, for example, as a log to be enclosed with the vehicle. Also an internet comparison of Vehicles and driving values are thus possible.

In In another aspect of the method, the acceleration over the Way, over the time and / or over the speed is displayed by means of the presentation unit. Thus, the driver can advantageously display the acceleration values according to his need to adjust.

A mathematical integration is also possible, so that on the basis of the acceleration values and the time on the speed or by further integration on the covered distance can be concluded. This can be done in particular during racing from standstill, since the initial distance s ₀ = 0 and the initial speed v ₀ = 0 is known. An example of a race from a standstill is the Quartermile race in the Dragster area.

Farther the task is solved by a method for detecting a tilting of a vehicle, wherein locates in the vehicle as described above Mitführgerät is, wherein a driver of the vehicle by means of Mitführgeräts a signal when crossing the border area is transmitted. Here, as a border area, a certain tilt angle to the rest position be specified. This can advantageously break out of the vehicle can be prevented.

The Signal when crossing The border area can be audible by means of the loudspeaker as well as transmitted visually by means of the presentation unit to the driver become.

Farther the task can be solved be by a method for determining the vehicle load of a Vehicle, wherein located in the vehicle as described above Mitführgerät is, with a long-term measurement of the acceleration values with subsequent evaluation he follows.

Thereby can advantageously the load of the vehicle over a huge Period to be determined. In addition, for example, a haulier monitor the driving styles of his drivers and if necessary, prescribe a different driving style. Also, these can Information to be used, the time of the next maintenance of the vehicle.

Long-term measurement of the type mentioned here Distances of 100 km to several 10,000 kilometers include.

Farther the task can be solved be by a cargo, which as described above Mitführgerät has. This allows the Accelerations are detected, which affect the cargo during the Transportes have acted. This can be used as an indicator of the treatment of Serving good transport. For example, throwing or dropping transport goods lead to characteristic accelerations, which with the Mitführgerät recorded can be. Especially All jerks and bumps are recognizable.

in the Further embodiments of the Invention and the method involved.

there demonstrate

1 the schematic structure of Mitführgerätes,

2 an ad on the display of Mitführgerätes and

3 an illumination of the entrainment device.

The illumination in 3 shows the Mitführgerät 101 , The width is 8.5 cm, the length 15.5 cm and the depth 4 cm. About the joystick 301 an entry is made by the user.

The carry-along device 101 has sensors 103 on. The sensors 103 include an acceleration sensor system and a brightness sensor. The acceleration sensor system has a Freescale G-sensor type MMA7260QT. The ones from the sensors 103 measured data are from the microcontroller 105 read. The reading takes place by means of an analog-digital converter 105 which signals to the microcontroller 105 edited.

The data of the sensors 103 be from the microcontroller 105 processed and sent to the display 107 transmitted.

It will be the acceleration data in a Kamm circle 209 on the display 107 shown. If the brightness sensor detects daylight, the backlight of the display is intensified. In darkness, the lighting is reduced. The display of the display is in 2 shown.

The Kamm circle 209 returns the border area. In addition, there are concentric circles 211 shown. The acceleration of a pure deceleration will be vertical down 209 shown. A pure acceleration becomes vertical upward 203 shown. Transverse accelerations of a pure left turn left horizontally 207 and pure right-hand turns horizontally to the right 205 shown.

In addition, the carry-along device has a flash ROM memory 113 on. In this store 113 are the operating system software for the microcontroller 105 and the evaluation algorithms for the sensors 103 deposited.

About the input means 117 a menu entry is made by the user of Mitführgerätes 101 , The power supply 109 the Mitführgeräts 101 takes place via a battery as well as via a USB charging cable.

To the driven acceleration values save and later on the USB port of the microcontroller 105 to read out, has the Mitführgerät 101 via a RAM memory in which this data is stored.

With the Mitführgerät 101 Accelerations are measured within a motor vehicle. These acceleration forces are visually displayed for every angle. If certain limits are exceeded, this is visually and acoustically communicated to the driver.

For racing or information purposes, with the Mitführgerät 101 the acceleration from 0 to 30 km / h, from 0 to 50 km / h, from 0 to 100 km / h, from 0 to 200 km / h, from 0 to 100 mph, from 0 to one mile or any other value measured.

Furthermore, the Mitführgerät has 101 via an auto-calibration. The Mitführgerät resembles 101 the values of the acceleration sensors with the rest position of the device 101 from.

With the device can various measuring procedures carried out become. These measurements include:

- Detected independently Braking:

there Parameters such as maximum, average and duration are the hardest Braking permanently displayed. These values can be saved or deleted. In addition, you can these values over one Websei te other participants to be made available. About these Parameter becomes the quality the braking system determined. So you can recognize bad with this system Tires, bad dampers or the nature of the substrate. In addition, this can be used as an aid used for vehicle tuner become.

- Detected independently Acceleration:

there become the parameters of the strongest acceleration permanently displayed. Again, you can the values are saved or deleted or transferred to the website become. A diagnosis of the drive system can take place. This can be bad Tires and engine problems are detected. This too can be used as an aid for tuners be used.

Furthermore, the device represents the Kamm's circle for the acceleration forces of the vehicle for each individual angle. This takes place by means of a vectorial addition of the accelerations. This makes sense because the tires of a motor vehicle can transmit a certain force between road and ground. Accelerations are, in a first approximation, the same for all angles. With good operations, it can be assumed that an acceleration of about 10 m / sec ² (1 g) can be transmitted in all directions. If the tires are heavily loaded, the tires may lose contact with the ground. The area in which the tires just have adhesion is called the boundary area.

• Anfahren: Die Räder drehen durch, und die Beschleunigung ist deutlich kleiner als ein 1 g.
• Bremsung: Räder ohne ABS blockieren, und das Kraftfahrzeug rutscht. Die Bremsbeschleunigung ist kleiner als 1 g, das heißt, dass die Haftreibung größer ist als die Gleitreibung.
• Kurve: Das Kraftfahrzeug kann den Kurvenradius nicht fahren, und der Kurvenradius vergrößert sich. Das bedeutet, dass das Fahrzeug aus der Kurve getragen wird.

The determined acceleration values, which arise from the transverse accelerations arising in curves, are vectorially added to the braking and / or acceleration vector and thus result in the resulting total acceleration vector. If the limit is exceeded, the following can happen:

• Starting: The wheels are turning, and the acceleration is significantly smaller than a 1 g.
• Braking: block wheels without ABS, and the vehicle slips. The braking acceleration is less than 1 g, which means that the static friction is greater than the sliding friction.
• Turn: The car can not drive the turn radius and the turn radius increases. This means that the vehicle is carried out of the curve.

For bad road conditions or bad weather conditions, the Kamm's circle goes through adapted to the user. The device warns when the limits are exceeded Driver. The limit range is specified by the driver or determined by Kamm's circle. For example, the driver can when Driving on ice or snow or when driving with summer tires cold temperatures lower the limit.

The Device can with sensors for the temperature, for possible Ice formation, for Moisture and / or for be equipped with the type of tire to make adjustments automatically.

The Accelerometer data will be every 20 or 50 milliseconds queried and digitally filtered. This ensures a real-time representation for the Driver.

The in RAM memory 111 stored data of Mitführgeräts 101 can be played on a computer.

Around to compare its driving values with others, these values can be on one Internet portal are deposited.

The Mitführgerät can also be designed waterproof, so that also motorcycle rides or rides in terrain can be recorded or displayed.

For monitoring a cargo renounces the Mitführgerät 101 optionally on the presentation unit 107 , This entrainment device is attached to the product to be shipped or the outer packaging. Upon arrival at the destination, the memory is read out and a check is made as to whether a certain limit has been exceeded.

The Device can be integrated into the pack.

In a not shown form of Mitführgeräts 101 has the Mitführgerät 101 a GPS receiver on. The position data and the acceleration data are stored in the RAM. Subsequently, these data are recorded on a computer. These data can in turn be transmitted to an Internet portal so that drivers can compare. In addition, these data can be linked to image information such as Google Maps.

Claims (22)

Mitführgerät, in particular for use in a vehicle, the Mitführgerät having an acceleration sensor system, a computing unit and a display unit, wherein the acceleration sensor system determines values of the acceleration and processed by the arithmetic unit and transmitted to the display unit, characterized in that the display unit has a border area and indicates the values transmitted by the computing unit of the acceleration. Mitführgerät according to claim 1, where the boundary area is displayed as a Kamm circle. Mitführgerät after a of the preceding claims, wherein the Mitführgerät a Speaker has. Mitführgerät after a the claims 2 or 3, wherein the presentation unit more to Kamm's circle indicates internal concentric circles. Mitführgerät after a of the preceding claims, wherein a microcontroller forms the arithmetic unit. Mitführgerät after a of the preceding claims, wherein the Mitführgerät a has analog-to-digital converter. Mitführgerät after a of the preceding claims, wherein the Mitführgerät a USB port. Mitführgerät after a of the preceding claims, wherein the Mitführgerät a volatile memory having. Mitführgerät according to claim 8, wherein a RAM memory the volatile Memory forms. Mitführgerät after a of the preceding claims, wherein the Mitführgerät a Has fixed memory. Mitführgerät according to claim 10, wherein a flash ROM memory and / or a flash memory form the read-only memory. Mitführgerät after a of the preceding claims, wherein the Mitführgerät a brightness control having. Mitführgerät after a of the preceding claims, wherein the entrainment device comprises input means. Mitführgerät according to claim 13, wherein one, two, three, four, five or more keys are the input means form. Mitführgerät after a the claims 13 or 14, wherein a joystick forms the input means. Mitführgerät after a of the preceding claims, wherein the entrainment device positioning means, in particular a GPS navigation system. Mitführgerät after a of the preceding claims, wherein the presentation unit is omitted. Method for measuring and displaying the acceleration a vehicle, wherein in the vehicle a Mitführgerät according to one of claims 1 to 17 is located. The method of claim 18, wherein the acceleration over the Way, over the time and / or over the speed can be displayed by means of the presentation unit. Method for detecting tipping of a vehicle, wherein in the vehicle a Mitführgerät after a the claims 1 to 17 is located, wherein a driver of the vehicle by means of the Mitführgeräts a signal when crossing of the border area becomes. Method for determining the vehicle load of a vehicle A vehicle, wherein in the vehicle a Mitführgerät according to one of claims 1 to 17 is located and a long-term measurement of the acceleration with followed by Evaluation takes place. Transport goods, which a Mitführgerät according to one of claims 1 to 17, in particular according to claim 17, comprising.