DE3320088A1 - METHOD AND ARRANGEMENT FOR CARRYING OUT VALUE INPUT AND VALUE OUT OPERATIONS BY MEANS OF THE DISPLAY AND REGISTRATION MEANS OF A Tachograph - Google Patents

Description

May 16, 1983

1817

O11.12 pa betw

Method and arrangement for performing value input and output operations by means of the display and registration means of a tachograph

The invention relates to a method and an arrangement for performing value input and value output operations by means of the analog display and / or recording means of a tachograph, in which the driving or motor movement representing measured values entered by means of an electrical "wave" and processed by an electrical measuring mechanism will.

With conventional tachographs driven by a mechanical rotary movement, it was common to adapt the Device to the vehicle or to its engine by consisting of interchangeable gears, as a special structural unit trained adapting gear to make. As is known, the number of revolutions of the transmission or the wheels is based on a certain distance differs from vehicle type to vehicle type, while those in these vehicles were fitted with the Devices that register or display rotational values of the gearbox or the wheels or also of the motor, such as, for example the tachograph, calibrated to a uniform input speed in production, and then later, only when the recording device is installed in the vehicle to make the adaptation to the vehicle in question.

This was the way of working with the conventional tachographs driven by mechanical rotary motion and Tachometers involved a considerable effort with the installation of these devices, whereby it should also be noted that the from transmission ratios of the output shaft specified by the manufacturers of the gearbox or the motor for the connection of the

Tachograph are not the same for all vehicles of a type, which is due to the fact that the vehicles under May be fitted with different tires. It was therefore necessary in practice to have each measuring device individually in the to match the installed condition to the vehicle, with the information provided by the manufacturer on the output speed of the gearbox or the motor are only to be regarded as an approximation.

For this purpose, a roller dynamometer has been provided in the workshops, with which the already installed device with the help of complex diagnostic devices on a specific, on the roller test bench the set speed or speed is set.

In smaller workshops, the tachograph was adjusted or the speed recorder to the vehicle without a roller dynamometer so that the vehicle has a Measurement section was brought to roll, the adaptation being carried out by the number of revolutions determined in this way.

Lately one already has tachographs with an electric one Measuring mechanism and an electric drive "shaft" created, which have the advantage in terms of their installation to be easier because on the one hand the laying of an electrical Cable causes fewer difficulties than laying a mechanical drive shaft and because on the other hand the electric tachograph is designed in such a way that it can be adjusted internally to the vehicle, i.e. not a special one Adjusting gear more needs.

However, since the electrical measuring system is an analog measuring device and since it is adapted to the vehicle by setting a potentiometer to a voltage value corresponding to the matching value, it is necessary to Determination of the correct comparison of the built-in travel

Writer to use a diagnostic device that provides a digital display of the conversion factor to determine that the adaptation of the device to the vehicle has been carried out correctly.

In the case of digitally working motor vehicle instruments, for example taximeters, one has to adapt to the vehicle also already done in such a way that one is arranged either via externally input pulse series or in the device Contacts enter the adjustment value digitally. For checking that the values are entered correctly, the taximeter has the advantage that it is also provided with a digital display so that the entered adjustment value can be made digitally visible on this display medium.

Something like this can be done with a tachograph that is provided with analog display and recording means, cannot be implemented, as the adjustment value is checked during input and if there is a new output via an electronic digital display is not possible.

The aim of the invention is therefore to provide a tachograph with analog display and recording means that is equipped with a electrical measuring mechanism and is provided with an electrical "shaft" to make it adaptable to the vehicle, while at the same time the use of a special diagnostic device should be dispensed with.

The prerequisite for this is not only the possibility of setting the "rotation values" of the vehicle via the normal drive, but also the possibility of the resulting adaptation values and, above all, to make the saved adjustment values visible, i.e. to display them, but also enter them immediately. Making the saved Adjustment values are used to control the correct

Adjustment by the workshop staff and possibly calibration instructions. the Entering the correct adjustment values serves to accelerate the adjustment process. By entering the adjustment values provided by the manufacturer are specified, you can make a pre-alignment in this way, and it then only needs less Corrections to adapt the tachograph to the vehicle individually.

The invention therefore provides, on the one hand, a method and

^ ° an arrangement for performing value entry operations with the display and / or recording means of a tachograph, in which those representing the driving or engine movement Measured values are processed digitally by means of a microprocessor, the output values of which via a digital control of a Stepping motor are brought into action on analog display and recording means, which is characterized by that a special pulse sequence for the stepper motor can be triggered via special switching means, through which the display and / or Recording means independent of the measured values representing the travel movement from the zero starting position to the full deflection position and can be moved back and that the deflection movement can be interrupted by the special switching means, wherein the extent of the deflection movement processed by the microprocessor as a value input and the display and / or recording means be returned to the zero position.

It also provides a method and an arrangement for implementation of value output operations with the display and / or recording means of the tachograph, in which the or measured values representing motor movement are processed digitally by means of a microprocessor, the output values of which are brought into action via a digital control of a stepper motor on analog display and recording means, which is characterized in that a special pulse sequence for the stepper motor can be triggered via special switching means,

by means of the display and / or recording means independently of the measured values from the zero starting position which represent the travel movement can be moved into the full deflection position and back, and that the deflection movement is controlled by internal control commands of a the program memory controlling the microprocessor is interrupted as a function of stored values for the purpose of value output and the display and registration means are returned to the zero position.

The input and output operations are controlled in such a way that for input and output of the number "5" the display means of the tachograph are brought up to the position 50 km / h or are locked in this position, for input or output. Output of the number "7" up to the position 70 km / h and, for example, for inputting or outputting the number "O ^M up to the position 100 km / h.

To the special pulse sequence, which is displayed via the stepper motor lead to the value input or value output position, do not work with a pulse repetition frequency that is too slow let, the control is provided so that at each Einzw. Output position of the display means, for example 3o km / h, 4o km / h etc. the display device is briefly locked so that the reading of the output value or entering the value with the special switching equipment is made easier.

In the event that the movements of the recording means in the input and output control operations for the adjustment values want to turn off, you can in the transmission parts between the display means and the registration means an electromagnetic Provide engaging and disengaging clutch, so that a "record the displayed and entered values are omitted.

At the beginning of each adjustment process, the display means

This tachograph initially pulse train gradually moved by the special by all the display positions and the operator has the ability to specify the device, which operation he wants to perform, that is, for example, displaying the previously set Anpaßwertes for speed or entering the Anpaßwertes for the engine speed etc.

The invention will now be described in more detail with reference to the accompanying drawings. In the drawings shows Io

FIG. 1 the hardware components of the arrangement with which Help the method according to the invention can be carried out should while

FIG. 2A and 2B illustrate the process flow.

As can be seen from FIG. 1 results, the electrical measuring mechanism of the tachograph is provided with a microprocessor 1 which receives its internal clock from a clock generator 2. The system also contains a system memory 3 in the form of a ROM or an EPROM as well as input ports 4 and output ports 5. Any number of keys T ₁ to T can be connected to the input ports 4, only some of which are used to achieve the arrangement according to the invention control, while other buttons are used for other purposes, such as controlling the time recorder, etc.

_{Sensors G 1} , G ₂ and G ^ are also connected to input ports 4, for example sensors for the distance and sensors for the engine speed, but also for example a sensor for fuel consumption and the like if the tachograph is connected to a fuel consumption meter.

The output ports 5 are connected to a stepper motor via driver 6 connected, which has the task, via its output shaft 8 and a gear 9, on the one hand, the display means 10 in the form

a pointer to drive, on the other hand, also via a gear 11 and a rack 12 a registration means in the form a pen 13 which records the measured values on a diagram chart, which are shown here for the sake of clarity is not shown. The pointer 10 is the normal speed pointer which shows the speed on a scale 14 in normal operation between 0 and 12o km / h, for example. Between the gear 9 and the pointer 10 and the gear there is a mechanical connection in each case, which is indicated by two shafts 15 and 16, but which is of course can also be realized accordingly in any other form with mechanical components. Part of the transmission 9 is another clutch, which is activated by an electromagnet 17 and can be disengaged, whereby it is achieved that the connection 16 between the gear 9 and the gear 11 is interrupted so that the stepping motor 7 drives only the pointer 10 via the connection 8, the gear 9 and the connection 15, so that the pen 13 remains at rest. The electrical measuring unit of the tachograph, consisting of the processor 1, system memory 3, input and output ports and 5, is connected to one another via address bus lines B and data bus lines B tied together.

In normal operation, the encoders generate G to G ^ pulses that either correspond to the distance covered or the engine speed, etc. These values are received by the processor 1 and are offset against a set constant, the adaptation value for the vehicle. This results in the respective Target speed, which is stored as a target value in the processor. At the same time is in the processor during the processing of the measured values the respective displayed or recorded actual speed, i.e. the position of the pointer 10 and the Pen 13 is saved as the actual speed. The processor now makes a comparison between the target value and the actual value. This comparison then results in a

Control value for the stepper motor, which is fed to the stepper motor 7 via the output ports 5 and the driver 6. The stepper motor adjusts the pointer 10 and the pen 13 by so many steps that the actual value and the target value of the speed coincide with each other.

For the purposes of the present invention, FIG. 1 shows three buttons T ₁ to T ₃ penetrating the front pane, which are electrically connected to the input ports 4. These keys, along with other keys possibly also present for other purposes, are part of the arrangement according to the invention and of the method according to the invention for inputting and outputting values in the tachograph.

The system memory 3 contains not only the control commands for processing the incoming measured values from the transmitters G- |, G ₂ , G ₃ but also a special program part for carrying out the method according to the invention for entering and outputting values. The keys T ₁ to T ₃ are the so-called special switching means, with the key T. The T-key must be switched on and off, ie it remains pressed as long as an adjustment process is in progress and must be released again manually. The key T ₂ is the key with the help of which the value input process is effected, the key T ₃ is the key which triggers the measurement process during the measurement acquisition for the adjustment.

How the method now runs in detail, should be specifically with reference to FIG. 2A and 2B will be described. However, it should first be said that, for the purposes of the method according to the invention, when a trigger command is present by the key T ₁ with the help of the microprocessor 1 and the clock generator 2, special pulse sequences are generated which are transmitted via the output

ports 5 and the driver 6 are fed to the stepping motor 7 and which are used to set the pointer 1o once each to move from the zero stop position to the full deflection position. The stepper motor moves the pointer in ten steps from 0 to 10 km / h, in a further ten steps from 10 to 20 km / h etc. To enable value input and output facilitate, the special pulse sequence is interrupted by the processor for a short time after every ten steps of the motor 7, so that the pointer pauses briefly at 40 km / h, 80 km / h etc.

Based on FIG. 2A and 2B now becomes the method according to the invention described in particular. A distinction must be made between three large groups of acquisition and output operations: 15th

a) The group for the automatic acquisition of the conversion factor for the speed, the distance and the speed,

b) the group of output operations for the one already stored Adaptation value for the distance and the speed and

c) the group of input operations for these values.

Each of these operations is assigned to carry out the invention Procedure to assign a code number, for example in the following order:

1. Automatic detection of the adjustment factor for the speed and the way by means of a roller test bench,

2. Automatic acquisition of the adjustment factor for ν and s by driving a test route,

3. Automatic speed measurement by means of a stroboscope,

4. Input of the speed adjustment factor, 5. Display of the speed adjustment factor, 6. Enter the speed adjustment factor,

7. Speed adjustment factor display,

8. and 9. Reserve code numbers for further function tests. 1o

The above three groups a to c result from the explanations given above for code numbers 1 to 9. The code numbers 1 to 3 mean the acquisition of the adjustment values according to a, while the code numbers 4 and 6 comprise the digital input of the already known adjustment values according to c and the code numbers 5 and the output of the adjustment values set in the device according to b) . In FIG. 2 is the system program 100, as it is stored in the system memory 3, the starting point of the method. The measured value processing is normally carried out according to 1o1. If necessary, the command can then be given via key T ₁ (code "On" 1o2) that acquisition, display or output of the adjustment values should now take place. Since no adjustment value is initially recorded when installing a new device, mode code no.? first recognized whether a recording process a (code no. 1 to 3 see above), an output process b (code no. 5 and 7) or an input (code no. 4 and 6) should take place. In the case of the newly installed device, there is still no code number. available so that code O is recognized, which is equivalent to an input process. Now the process takes place as it is shown in FIG. 2B is shown. According to 1o5, the code no. (in this case 0) a memory is provided in processor 1, which contains the code no. should record. The processor now generates the special pulse sequence according to 1o6. The stepping motor 7 is driven by this special pulse sequence in such a way that it runs from 0 to 10, to 20, to 30, etc. km / h.

- »- ^ 3320038

It is assumed that the speed and distance values are now to be recorded by the roller dynamometer. _{As a result, the operator moves to key T 2} when the pointer 10 reaches the display position 10 km / h. As a result, the value "1" is stored in the memory selected according to 1o5. The stepping motor 7 is reversed and runs back (1o9) / until it has reached the zero position. The special pulse sequence is then triggered again, the pointer running through the individual positions of the display until it is determined in a last program step that no further digits should be entered (11o). A message is sent back to the system program that the first process of entering the code has been completed.

The vehicle is now initially on the roller dynamometer. The key T ₁ is pressed and entered as code no. the number "1" is saved, which means the automatic recognition of the adjustment value by the roller test bench. The drive roller of the roller test stand is accelerated to a certain speed of, for example, 60 km / h displayed on the roller test stand, which is then maintained. This is displayed on a speedometer connected to the roller dynamometer. Since the key T- (code "On") remains pressed, there is no normal processing of the incoming measured values according to 1o1 and thus no normal control of the display and recording means of the tachograph. initially determined according to 1o3 which of the processes a to c is to take place. According to 12o it is determined that the code no. "1 ^M (automatic recording of the adjustment values for ν and s by means of a roller dynamometer) is stored according to 1o5. If the roller of the roller dynamometer has reached a constant speed of 60 km / h, the operator presses the T ₃ button, which is recognized according to 121 so that the acquisition program 122 can now run, which is only to be described in rough outline.

With the adjustment values, the display and recording means of the tachograph remain calm. The processor 1 of the tachograph, controlled by the system memory 3, counts how many pulses arrive at a speed of 60 km / h in a certain period of time. This value is related to a constant, the device constant, and from this the adaptation value is determined in the processor, which is then stored. The situation is similar when it comes to adapting to the path. In the roller dynamometer, after pressing button T ₃ according to 121, the

Drive roller driven for a certain distance and then locked. Here, too, the _{pulses generated by the transmitter G 1} during this path are counted in the processor, compared with a constant, and the adaptation factor is calculated and stored. The separate acquisition of the distance and speed values is particularly necessary when the measured value processing displays and records the distance and speed values by means of separate display and recording means. After these processes have been completed, the key T _{1 is released} , because before capturing both

For example, the speed values would have to have a new code no. can be specified, which can only be done immediately by indenting the T-j button takes place.

The situation is similar if a test route according to 123 is to be driven for the acquisition of the adaptation value. Instead of the code no. 1 according to FIG. 2B 1o7 the code no. 2 according to 111 are entered and stored (112). The vehicle is then allowed to roll over the test track, and at the moment when the initial marking has been reached, a switch-on signal is given via key T, and the method according to 123 is carried out in that the incoming pulses are again counted. By pressing button T _{3 again} when driving over the end marking of the test route, the detection process is ended, the number of pulses received is compared with a constant and from this in

Processor 1 of the tachograph calculates the adjustment value and stores it in this processor. Instead of pressing button T ₃ to record the adaptation value by means of the test section, a light barrier set up at the end and at the beginning of the test section can also be used.

The method part 124 is used for the detection of the adaptation values for the engine speed. In order to trigger this part of the procedure / the key T ₁ must first be disengaged again, pressed again and then the code no. 3 according to FIG. 2B km in position 30 on the button _T2 / h are entered. A marking is attached to a part of the vehicle that revolves according to the engine speed. A stroboscope is used to determine when the specific, preset number of tours has been reached. With the engine speed remaining the same, key T ₂ is then pressed again in the detection process, so that the pulses arriving from the engine speed sensor G ₂ are counted. After a certain acquisition time, the process is completed; the number of pulses that have been received up to that point, which represent engine revolutions, is compared with a constant. A conversion factor is calculated from this, and this is stored in processor 1 as an adjustment value. Of course, the method part 124 is only to be carried out if the tachograph is a device which also has an engine speed display and recording.

To make the saved adjustment values visible, the code no. 5 and 6 - depending on whether the speed adjustment factor or whether the speed factor is to be specified - must be entered. How this is done has already been described above. After pressing the T- button, the stepper motor will gradually move the pointer from the positions 10 km / h, 20 km / h etc. to the positions 50 km / h or 70 km / h. According to FIG. _{2B, the key T 2 is} pressed in the correct position desired in each case. Through this

the movement of the pointer is prevented and the corresponding Digit as code no. saved. Key T-j "Code-On" remains pressed, and according to 1o3 it is now recognized / that either the code no. 5 or 7 is set so that according to b now a part of the method is triggered by again feeding a special pulse sequence to the stepping motor according to FIG. 13o. In each Stop position of the pointer, a comparison is made between the actual position of the pointer and the value in the first Place of the memory is stored (131), which has recorded the adaptation value for the speed or the rotational speed. at Inequality, the stepper motor continues, if equality is found according to 132, the stepper motor runs for a somewhat longer period of time locked so that the operator can read and write down the corresponding number. The stepper motor is then reversed and runs back to the starting position (133). As long as the last digit (134) of the adjustment factor has not been reached, in the zero position (135) again triggers a special pulse train (13o) so that the stepping motor deflects the pointer again from the zero position and brings it into the individual display positions, until the second digit is displayed correctly in comparison with the values stored in the memory for the adjustment factor, see above that the stepping motor stops (according to 132), runs back (according to 133) until all digits of the display value are displayed one after the other have been. If all digits are queried one after the other, according to 134 a response is sent to the system program after 1oo, that the display process is completed. The T. key must then be released again.

An input process for the values is similar to that for the code number above. was described and how in FIG. 2B. First the code no. for an input process - i.e. 4 or 6 - can be entered. Then it will be decided according to 1o3 that it is an input process c. According to 1o5, the corresponding memory is then used Selection provided. The special pulse train leaves the pointer

run through the various display positions and press button T ₂ at the required point. The value indicated by the pointer in this position is stored in the memory provided in accordance with 1o5 (1o8 _f 112). The pointer runs back to the zero position and, as long as the last digit (11o) has not been entered, the setting process of the pointer is repeated, with all digits representing the adjustment value being entered one after the other. After the last digit has been entered according to 11o, there is again a response to the system program according to 1oo. Before the tachograph can resume its normal processing of measured values, key T ₁ must of course be released. Only then can normal measured value processing be resumed according to 1o1.

The described method and the described arrangement make it possible to adapt the tachograph to the encoder with a little extra effort in the hardware of the device - a few buttons, some program memory capacity - to effect the input and output of the adjustment factors by means of the normal display and recording means.

Claims (6)

16.o5.1983 1817 Patent claims: Method and arrangement for performing value entry operations with the display and / or recording means of a tachograph, in which the driving or motor movement representing measured values are processed digitally by means of a microprocessor, the output values of which via a digital control of a stepper motor is brought into action on analog display and recording means, characterized, that via special switching means (T ₁ to T ₃ ) a special pulse sequence for the stepping motor (7) can be triggered, by which the display (1o) and / or recording means (13) independently of the measured values representing the travel movement from the zero starting position to the full deflection position and are movable back and that the deflection movement can be interrupted by the special switching means (T ₂ ), the extent of the deflection movement being processed by the microprocessor (1) as value ^ i ^ g ^ fre and the display and recording means (1o, 13) being returned to the zero position. 2. Method and arrangement for performing value output operations with the display and / or recording means of a tachograph, in which the driving or motor movement representing measured values are processed digitally by means of a microprocessor whose output values brought into action on analog display and recording means via a digital control of a stepper motor will, characterized, that a special pulse sequence for the stepping motor (7) can be triggered via special switching means (T ₁ to T ₃ ), by means of which the display (1o) and / or recording means (13) independently of the measured values representing the travel movement from the Zero starting position can be moved to the full deflection position and back / that the deflection movement is interrupted by internal control commands of a program memory (3) controlling the microprocessor (1) depending on stored values for the purpose of value output and the display (1o) and recording means (13) are returned to the zero position. 3. The method and arrangement according to claim 1 or 2, characterized in that the special _{switching means (T 1} to T ₃ ) are in the form of manually operated buttons. 4. The method and arrangement according to claim 1 and 3 / characterized, that one key (T.) is used to start the full deflection movement of the display and / or recording means, while pressing the other (Tj) interrupts the deflection movement.
2o 5. The method and arrangement according to claim 1 or 2, characterized in that one key (T ₁ ) has a test trigger function, a second Key (T ₂ ) has the value input function. 25th 6. The method and arrangement according to claim 1 or 2, characterized in that that the special pulse sequence is fed to the stepping motor by the microprocessor in such a way that the full "tens" (2o, 3o, 4o ... km / h) corresponding intermediate position of the display means (1o) a short-term lock he follows. Method and arrangement according to claim 1 or 2, characterized / that between the display (1o) and registration means (13) a coupling is arranged, which for the purposes of entering values and output operations is solvable (17), so that only the display means (1o) in the form of playing over scales Pointers for value input and output can be driven.