DE3839221A1 - Travel data memory - Google Patents

Abstract

The invention relates to a travel data memory which has a battery-buffered real-time clock and a sensor which supplies digital, displacement-proportional pulses and is connected to the tachometer of a motor vehicle. In contrast with conventional trip recorders, this travel data memory stores the event data in binary form and said data can only be evaluated and expressed in plain text by means of an external computer with corresponding adaptor and software.

Description

Rising costs and growing competition are forcing more than ever, all possibilities of in-house con to use trollings to continue being economical to secure the company.

Since the cost of field activities of a sub very large and by personnel and vehicles difficult to control at the same time, are often also vehicles for no journeys according to 57a StVZO clerk is provided, e.g. Cars, station wagons and trucks less than 2.8 t gross vehicle weight with one mechanical travel data memory equipped to one Control over actual driving times and driven To have kilometers.

However, these tachographs have the following disadvantages:

• - relatively high acquisition costs
• - low recording density (approx. 1 week)
• - not tamper-proof
• - cumbersome evaluation of the tachograph discs
• - Time-consuming listing of driving and break times.

As an alternative, there are so-called vibrating recorders. Here become natural vibrations of the vehicle as a journey interpreted and as an integrated mechanical clock Travel time bar registered on a paper strip. However, these pens also have disadvantages:

• - poor cost-benefit ratio
• - imprecise due to the "vibration threshold"
• - It is not possible to record the kilometers driven.

According to the invention, all of these disadvantages are overcome by the Driving data memory removed.

Especially in areas where company property outside the Operation of employees used and therefore also can be used privately, e.g. for service and companies vehicles, the driving data memory offers one possibility comprehensive, cost-effective control of the set of vehicles and field staff increase.

The travel data memory registers:

• - start of driving
• - travelers
• - driving time
• - Kilometers driven
• - Driving breaks of more than 5 minutes
• - attempts at manipulation
• - Driver change

The electronic travel data memory can be used in any Vehicle with standard speedometer connection can be installed.

Functionality:

Via a commercially available sensor, which is between the speedometer and speedometer cable is screwed, the incoming path-proportional (digital) tachometer pulses in one Counter added.

At the same time, the start of the journey with the date and time is shown in stored in a so-called volatile memory. For this The purpose is a real time clock in the driving data memory intended.

No more tachometer signals are received for more than 5 minutes, the journey is considered to be completed and this Time of the end of the trip together with the already cached data (start of journey, counted speedometer impulses) stored in the permanent memory.

With a battery integrated in the travel data memory mulator is the driver's own (emergency power) supply data storage ensured. This is important for that Real time clock and for the recording of manipulation ver for example in the form of a power supply refraction.

With such a manipulation attempt, the beginning and End of power interruption timed. About it during the trip for the last 3 Minutes the shortest time intervals between the incoming tacho signal pulses per unit of time (Second) and possibly saved per trip. This one Time intervals are proportional to the speed, so (for example after accidents) the last one Maximum speed value determined from the memory will.

Amount of memory

The trip data memory can save over 3000 trips. This means that with a monthly collection Control over 100 single trips per day saved can be a limit that in practice never is achieved.

Reading and deleting the data can be done according to the invention only with external software, which Can access the data storage (EPROM). Should If the data deletion is forgotten, then at Reaching the storage capacity limit (overflow) of the oldest value overwritten.

Tamper-proof

Should attempt to tamper with the device become what is theoretically only by interrupting the Power supply / on-board voltage can take place, so will this via the integrated in the driving data memory battery-backed real-time clock registered and the Interruption time saved.  

Assembly and connections

According to the invention, the driving data memory is equipped with a easily screwable plug holder with integrated Plug connector supplied so that the device quickly to "Reading" the data can be removed.

The speedometer signal is also found via this connector strip transmission and the 12 volt on-board power supply instead of. The operability of the driving data memory is indicated by an LED.

Reading / evaluating data

The data can be read out with any commercially available Personal computer with V-24 interface. Therefore software is required which can be accessed via a Adapter cable for the connection between the driving data memory can access the binary coded data. This software enables the driving data to be read out. they has an arithmetic and Printer program that runs from every vehicle Book log in DIN A 4 (endless) format, in which the kilometers driven as well as driving and Downtimes are printed out.

So a slight cross-check with weekly, assembly or visit schedules possible.

This software with plug and instruction manual can Query any number of travel data memories. With the Software can also save the old data of the driving data be deleted.

Furthermore, the connector is coded according to the invention bar provided so that when reading data already it is recognized which vehicle it is. Before the individual code of the Driving data memory can be saved, which by the corresponding combination of the plug contacts under can be adjusted to each other. As a result, the Computer or software can immediately recognize which one Vehicle the data of the respective driving data memory are to be assigned. This saves a regular query Regarding vehicle registration number and driver for every Da read out, which is then printed out with the log will.

According to the invention, an individual coding is also used provided, for example a numeric keypad, a key opening or a magnetic card reader so that when a vehicle is used by several drivers, these later in the log printout of the individual trips can be assigned.

The advantages of driving data storage are:

• - Clear A4 printout of all trips and Breaks with date / time and kilometers driven
• - No "forgetting" the tachograph disc or the Logbook entry possible
• - High storage capacity (over 3000 trips, exp terbar to 6000)
• - Time savings when checking travel costs by off printing of actual data
• - Storage of any manipulation attempts (Stromun break)  
• - Data can only be read out by authorized persons (Access software)
• - No data loss in the event of a power failure (battery power clock)
• - No calculation process required in the driving data memory these are only carried out by the software in the data evaluation / reading
• - Very inexpensive to manufacture and efficient at the user
• - Clear assignment of trips to driver and vehicle

The drawings show in detail

Fig. 1

1 travel data memory
2 LEDs for function control
3 Codable connector strip socket for simultaneous power and signal supply
4 holder for travel data recorder (plug-in device)
5 attachment points
6 connector socket
7 socket outlet / input
8 vehicle speedometer
9 vehicle speedometer sensor
10 vehicle battery

Fig. 2

1 travel data memory (device)
2 LEDs for function control
3 Codable socket connector
8 vehicle speedometer
9 vehicle speedometer sensor
10 vehicle battery
11 Driving data storage battery
12 driving data memory real time clock
13 counters
14 volatile driving data memory
15 driving data memory
16 adapter cables (travel data memory / computer)
17 Computing and printing software
18 computers
19 Driving data printout (protocol)
20 individual encoders

Claims (10)

1. Driving data memory, which is connected to the vehicle speedometer and registers these distance and speed signals together with the assigned time, characterized in that when the first digital speedometer signal is received, these are added up by a counter and stored in a volatile electronic buffer with date and time of the first tachometer signal who who and after receipt of the last tachometer signal are stored together with this point in time in a read-only memory as a travel file in the form of binary data. 2. driving data memory according to claim 1, characterized records that completing and saving a Driving file, consisting of the time of the start of the journey, the Number of tachometer signals proportional to the path and the time of the end of the trip, only then happens if there is no speedometer for a specified period of time signal is received. 3. driving data memory according to claim 1 and 2, characterized in that the driving data memory via has its own battery-backed real-time clock, which this event when the charging / on-board voltage is interrupted time recorded with start and end and this value in the Saved memory. 4. driving data memory according to claims 1-3, characterized records that only a storage of the aforementioned Event data takes place, but not an evaluation or decryption. 5. driving data memory according to claim 4, characterized records that the evaluation of the event data and a Calculation of travel time, route, last maximum speed as well as breaks in driving by means of a Computer software is done on an external computer. 6. driving data memory according to one of claims 1-4, characterized in that the last highest (Speed proportional) digital speedometer signal follow with is saved in the non-volatile memory. 7. Driving data memory according to one of the preceding An sayings, characterized in that the Fahrdatenspei cher a holding and inserting device with plug lead covers base, which in a in the Fahrdatenspei integrated socket connector fits over the transmission of on-board voltage and digital Speedometer signals occur.   8. driving data memory according to claim 7, characterized records that the baseboard is more than the three Signal / voltage transmission required contacts includes which are used for coding purposes and thus confusing the driving data memory with each other the exclude. 9. driving data memory according to claim 5, characterized records that reading and evaluating the event data only with an adapter plug between driving data memory and evaluation computer is possible, which decoding also by appropriate pin assignment the driving data memory affiliation. 10. Driving data memory according to one of the preceding Claims, characterized in that the driving data store an additional individual coding device, for example a number keypad, a key encoder or a magnetic card reader.