WO2000045995A2 - Kabel-sparschaltung - Google Patents
Kabel-sparschaltung Download PDFInfo
- Publication number
- WO2000045995A2 WO2000045995A2 PCT/EP2000/000819 EP0000819W WO0045995A2 WO 2000045995 A2 WO2000045995 A2 WO 2000045995A2 EP 0000819 W EP0000819 W EP 0000819W WO 0045995 A2 WO0045995 A2 WO 0045995A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- central unit
- time
- screwdriver
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
Definitions
- the invention relates to a device and a method for transmitting coded data between a screwing device and an assigned central unit.
- Fig. 1 shows a schematic side view of an electric screwdriver 8, as used in the prior art.
- electrical connecting lines 22 are required which connect the device to an associated control and supply unit. Due to the diverse functions required in such an electric handheld screwdriver, corresponding multi-core and thus heavy cables are required.
- a conventional handheld screwdriver typically has the following cable assignment:
- a connecting cable 22 with 1 is typically used 8 Cablea ⁇ countries necessary.
- complex and thick cables also lead to complex, fragile and expensive plug connector systems and pull a correspondingly high cable assembly effort. Since such cables are exposed to constant mechanical loads, they are very susceptible to faults and must be replaced at regular intervals.
- a screwdriver arrangement comprises a screwdriver, a central unit and a transmission means, the screwdriver at least one encoder for generating coded data from a large number of data in the screwdriver and the central unit at least one decoder
- Restoring (decoding) the plurality of data from the transmitted coded data and the transmission means is designed to transmit the coded data from the screwdriver to the central unit.
- data or signals detected by the screwing device can be encoded by the encoder which is provided in the screwing device
- Data are converted, which can be decoded into the original data (multitude of data) by the decoder following a transmission by means of the transmission means in the central unit.
- the transmission means is preferably for serial transmission of the coded
- the transmission means comprises at least one flexible cable which connects the screwing device to the assigned central unit.
- the flexible cable is preferably a two-wire transmission cable which is provided in addition to a power supply cable between the screwing device and the central unit.
- the power supply cable can be a conventional supply cable (power cable), which does not have to have any further cable wires for data transmission.
- the transmission cable is preferably a two-core cable that has an additional one
- Shielding and / or twisting (twisted pair) can have.
- the cable is particularly preferred to design the cable as an at least two-wire power supply cable and to provide the screwdriver with a transmission transformer for transmitting the coded data via the power supply cable, so that an additional transmission cable can be dispensed with.
- the transmission transformer can be a high-frequency transformer, which modulates the coded data to be transmitted onto the power supply cable as modulation signals.
- the encoder can also be supplied with power via the transmission formator from the power supply cable.
- the central unit of the screwdriver arrangement can, in particular, be a supply and / or control unit which can control or regulate control signals and / or current or voltage supplies for the screwdriver.
- At least one encoder for encoding a plurality of central unit data is encoded in the central unit Central unit data and in the screwing device at least one decoder for decoding the transmitted coded central unit data into the plurality of central unit data and the transmission means for transmitting the coded central unit data from the central unit to the screwing device.
- This data or signal flow from the central unit to the screwing device can take place either via the transmission cable or the power supply cable or via an additionally provided transmission cable or further cable wire.
- the screwing device has at least one motor that can be controlled by the central unit.
- the invention can also be used, for example, in drilling, milling and / or screwing devices of corresponding arrangements
- the central processing unit comprises at least one time processing unit which is used to determine an input time of an input of a data record of the transmitted coded data in the central processing unit and / or a recovery time (decoding time) of a restoration (decoding) of a data record of the large number of data in the central processing unit and is designed to calculate an engine control signal output time from the input time or the recovery time in consideration of a predetermined process and transmission time, and the central processing unit is designed to output engine control signals to the engine which take effect at the control signal output time.
- the time processing unit makes it possible to compensate for the time delay caused by the coding, transmission and decoding of the large number of data or coded data between them
- Detection or generation occurs in the screwing device and the further processing of the central unit occurs, corrected or taken into account in the control of the motor, without relying on costly components for high-frequency applications. to have to resort to.
- Such a process and transmission time will always be particularly noticeable when a high-precision control or regulation of the screwing device is provided as a function of data previously transmitted from it to the central unit.
- the time processing units enable high-precision timing
- Control or regulation of an electric motor of the screwing device even in motor speed ranges which, due to the process and transmission time, which are no longer negligible, no longer allow "real-time control or regulation", including the respective rotational angle positions during the movement and in the intended end position.
- individual data records of the coded data are preferably transmitted from the screwing device to the central unit only in the event of a signal or data change, ie. H. a new record of encoded data is only sent from the encoder to the decoder if the record differs from the immediately preceding record.
- a control signal output time in particular for the motor, in which control signals in the screwing device must be effective in order to be correct in time " to be synchronized ".
- a control signal is, for example, the voltage or the current intensity from one of the motor phases of the power supply to the electric motor.
- the time processing unit preferably comprises at least a first and a second timer, the first timer being designed for determining the input time and / or the recovery time and the second timer for determining the engine control output time.
- the first timer is particularly preferably designed as an up counting timer, which counts up from a predetermined output value at an input time of a previous data record of the transmitted coded data to a target value at the input time of the (later) data record, wherein the time processing unit is configured to transfer the target value corrected for the process and transmission time to the second timer, the second timer is a countdown timer and counts down from the corrected target value to the predetermined output value, and the CPU for outputting the engine control signals to the engine at the engine control signal output time is designed, in which the second timer has counted to the predetermined output value.
- the previous data record is preferably one of three immediately preceding data records or a predetermined mean value from these, particularly preferably the first immediately preceding data record.
- the first timer preferably counts from the predetermined output value 0 at the input time of the immediately preceding data record of the transmitted coded data to a target value which it reaches at the input time of the immediately subsequent data record, and the second timer counts from the corrected target value to the output value 0 down.
- the corrected target value results from the target value minus a value that corresponds to the process and transmission time.
- the use of at least one encoder in a screwdriving device and at least one decoder in a central unit is proposed, the encoder encoding a large number of data as encoded data and the decoder decoding the transmitted encoded data into the large number of data and thus a reduction in the number of transmission cables a transmission means under a number of data lines of the screwing device or number of different sensor signals or data detected by the screwing device, in particular less than four, preferably less than three.
- Screwdriver and an assigned central unit to reduce significantly.
- a screwdriver arrangement according to the invention proposed with a time processing unit for screwdrivers, which should work in a high speed range greater than 5000 revolutions / minute, in particular greater than 1 0000 revolutions / minute.
- "real-time control" of, for example, a screwdriver motor is only possible with great difficulty, since the corresponding time scales require control or regulation in the MHz frequency range.
- the use of a screwdriver arrangement according to the invention and a time processing unit enables the process or transmission time problem to be solved using electronic means which only have to have a typical processing frequency in the kHz range. This solution is far superior to a "MHz solution” in terms of both manufacturing costs and size and operational reliability.
- a method for transmitting data between a screwing device and a central unit is also provided with the following steps:
- the method has the following additional steps:
- the method provides, in particular, that the central unit provides a control signal output time from an input time of a data record of the transmitted coded data in the central unit and / or a recovery time (decoding time) of a restoration (decoding) of a data record
- a large number of data in the central unit is determined taking into account a predetermined process and transmission time and transmits control signals to the screwing device which take effect at the control signal output time.
- the control signals can be, in particular, supply voltages or currents of the individual motor phases of a motor of the screwing device, which are output by the central unit at the time of the control signal output time.
- the central unit preferably determines the input time of the data record of the coded data from a time difference between an input of a previous one
- the previous data record is an immediately previous data record. In this case, it is particularly possible that the
- Control output time succeeds the input time of the data set of the transmitted coded data by a time period which is the input time reduced by the process and transmission time.
- a particular advantage of the invention can be seen in the use of a method or a screwdriver arrangement or a control of high-precision screwdriving devices, in which a high-precision tool angle positioning or control is important regardless of the operating speed of a screwdriver motor.
- FIG. 1 shows a schematic side view of a conventional hand screwdriver
- FIG. 2 shows a block circuit diagram of an embodiment of a screwdriver arrangement according to the invention
- 3 shows a block circuit diagram of a further embodiment of the invention. screwdriver arrangement according to the invention
- FIG. 4 shows a block circuit diagram of a further embodiment of a further screwdriver arrangement according to the invention.
- FIG. 5 is a flowchart showing the logical sequence of steps in an encoder of a screwdriver arrangement according to the invention.
- FIG. 6 is a flowchart showing the logical sequence of steps in a decoder of a screwdriver arrangement according to the invention.
- FIG. 7 shows a signal-time diagram which shows the functioning of a first and second timer of a time processing unit of a screwdriver arrangement according to the invention.
- the processing device is a handheld screwdriver 32, which comprises a brushless DC motor 36 with an associated motor position sensor 1 2.
- the motor position sensor 1 2 is connected via a four-wire cable to the encoder 38, which serves as a transmitter.
- Start switch signals or data 14 ' which are generated by a manually operated start switch 14 (see FIG. 1), are fed into the encoder 38 via a two-wire cable.
- the motor position sensor 1 2 typically has at least three Hall sensors with which an angle of rotation orientation of a motor shaft of the motor can be determined at any time.
- the encoder 38 receives torque sensor data or signals 18 'and rotation angle sensor data or signals 16' via four- or two-wire cables.
- the processing device 32 further comprises a decoder (receiver) 40, via which the indicator lights IO (green) 20a and NOK (red) 20b are controlled.
- the processing device 32 is connected to a central unit 30 via a transmission means 34.
- the transmission means 34 here consists of a five- to six-wire flexible cable which is divided into a three-four-wire power or motor supply cable and a two-wire data or signal transmission T / EP00 / 00819
- the power supply cable and the data transmission cable are provided in a common protective armor.
- the motor supply cable is connected to a power unit 42 in the central unit 30 and the signal or data transmission cable is electrically conductively connected to a decoder (receiver) 44 in the central unit 30.
- a decoder receiveriver
- an encoder transmitter
- the encoder 46 and the decoder 44 are connected to a screwdriver control unit 48 via a multi-core broadband cable.
- the electrical power supply lines to the decoder 44, the encoder 46 and the screwdriver control unit 48 are not shown.
- FIG. 3 shows a schematic block view of a second embodiment of a processing arrangement 32 according to the invention.
- a transmission transformer 50 is used in the processing device 32 in order to send or receive signals or data and a supply power of the encoder 38 and decoder 40 via the power or motor power supply cable.
- the additional two-wire signal or data transmission cable used in the embodiment shown in FIG. 2 can thus be dispensed with.
- the transmission transformer 50 is a high-frequency transformer, which modulates the data or signals on two cable cores of the motor supply cable at a high frequency. The total number of cable cores required for the transmission medium can thus be reduced to three cable cores.
- the motor supply cable is a conventional standard power cable, which is much cheaper than a 1 8-core special connection cable, which is in the
- FIG. 4 shows a third embodiment of the processing arrangement 32 according to the invention.
- the power supply of the encoder 38 and the decoder 40 of the processing device 32 is taken over by a separate transmission transformer 52, which is provided in addition to the transmission transformer 50 which improves transmission efficiency and security security of data and services is made possible.
- the mode of operation of the machining arrangement 32 according to the invention here an electric handheld screwdriver, is explained below.
- a screwing process by means of the electric hand screwdriver 32 is triggered by actuating the start switch 14.
- All sensor data or signals recorded in the handheld screwdriver 32, in particular those of the engine position sensor 1 2, the start switch 14, the torque sensor 1 8 and the angle of rotation sensor 1 6 are fed to the encoder 38 of the handheld screwdriver 32. If one or more signals of said sensor data change, the encoder 38 sends the data as one coded
- the encoder 46 in the central unit 30 sends control signals to the decoder 40 in the handheld screwdriver 32 so as to give the operator feedback via the light-emitting diodes 20a, 20b as to whether the screwing process has been carried out properly or has ended.
- the control LED 20a green
- the control LED lights up NOK, red
- the transmitted coded data are subsequently decoded and processed, which will be described in more detail with reference to FIG. 6. If the value of the start signal 14 'of the start switch 14 is equal to the value "STOP", a stop command is sent to the decoder 44 in the central unit 30 and the screwing process is ended. However, the start signal has a different one
- the sensor data in the handheld screwdriver 32 is further read out and compared by the encoder 38. Consequently, the encoder 38 only sends data to the decoder 44 if there is a change in the Hall sensor data or the motor position sensor data.
- a transmitted data record typically has a size of at least four, typically eight or sixteen bits.
- This flowchart relates to an embodiment of the processing arrangement which is particularly suitable for handheld screwdrivers which are also to be used in a high speed range above 5000 revolutions / minute. At such high speeds, the problem arises that "real-time control" of the motor of the handheld screwdriver 32 can no longer be carried out by the central unit 30, since a process and transmission time .DELTA.t is no longer negligible compared to the typical commutation times of the brushless DC motor, since the Transmission between encoder 38 and decoder 44 typically occurs at a data transfer rate of less than 50 kbaud.
- Determining the input time T- of a data record of the coded transmitted data in the central unit can also determine a recovery time (decoding time) T r .
- the recovery time T r is understood to mean the point in time at which the large number of data has been restored by the decoder 44 from the data record of the transmitted coded data.
- a timer 1 which is designed as an up-count timer, is set to the value 0 and started when a "START signal" is received by the encoder 38. In the following it is checked whether the data of the motor position encoder
- timer 1 XT ⁇ . This value XT, timer 1 can consequently be assigned to a time T, which encoded between two inputs of immediately following data records
- a process and transmission time value X ⁇ t is now subtracted to correct the process and transmission time ⁇ t.
- This value is transferred to a timer 2, which is designed as a countdown timer, after which it is started.
- the commutation register for the motor commutation of the handheld screwdriver motor 36 is increased by a value. If no stop signal is subsequently obtained from the encoder 38, a check is made as to whether the countdown timer 2 has already expired, ie has reached the value 0.
- FIG. 7 again shows in a signal / voltage time diagram the mode of operation of the time processing unit working with two timers, only a single run through the flow diagram shown in FIG. 6 being shown.
- the motor commutator values or Hall sensor values are only shown schematically as square-wave voltages.
- the decoder 44 receives the immediately following data record N of the transmitted coded data. Because of the process and
- transmission time ⁇ t is to be assigned an “actual” time T- - ⁇ t to this data set N.
- T- the timer 1
- the countdown timer 2 is loaded and started with the remaining time value XT, -X ⁇ t.
- the timer 2 reaches the initial value 0 at exactly the time T 2 , at which one
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Control Of Electric Motors In General (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Dc Digital Transmission (AREA)
- Selective Calling Equipment (AREA)
- Cable Accessories (AREA)
- Communication Cables (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00909134A EP1148977B1 (de) | 1999-02-05 | 2000-02-02 | Kabel-sparschaltung |
| AT00909134T ATE231048T1 (de) | 1999-02-05 | 2000-02-02 | Kabel-sparschaltung |
| AU31521/00A AU3152100A (en) | 1999-02-05 | 2000-02-02 | Economy connection for a cable |
| DE50001088T DE50001088D1 (de) | 1999-02-05 | 2000-02-02 | Kabel-sparschaltung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904776.6 | 1999-02-05 | ||
| DE19904776A DE19904776A1 (de) | 1999-02-05 | 1999-02-05 | Kabel-Sparschaltung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2000045995A2 true WO2000045995A2 (de) | 2000-08-10 |
| WO2000045995A3 WO2000045995A3 (de) | 2000-11-16 |
Family
ID=7896590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2000/000819 Ceased WO2000045995A2 (de) | 1999-02-05 | 2000-02-02 | Kabel-sparschaltung |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1148977B1 (de) |
| AT (1) | ATE231048T1 (de) |
| AU (1) | AU3152100A (de) |
| DE (2) | DE19904776A1 (de) |
| ES (1) | ES2187450T3 (de) |
| WO (1) | WO2000045995A2 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10030357A1 (de) | 2000-06-21 | 2002-01-17 | Heidenhain Gmbh Dr Johannes | Verfahren und Vorrichtung zur seriellen Datenübertragung zwischen einem Positionsmesssystem und einer Verarbeitungseinheit |
| US6913087B1 (en) | 2004-01-30 | 2005-07-05 | Black & Decker Inc. | System and method for communicating over power terminals in DC tools |
| US20140069672A1 (en) * | 2011-05-20 | 2014-03-13 | Hitachi Koki Co., Ltd. | Power Tool |
| US10131042B2 (en) | 2013-10-21 | 2018-11-20 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3619128A1 (de) * | 1986-06-06 | 1987-12-10 | Frankl & Kirchner | Industrienaehmaschine |
| JPS63178332A (ja) * | 1987-01-20 | 1988-07-22 | Fujitsu Ltd | デ−タテスト回路 |
| DE3744733A1 (de) * | 1987-08-07 | 1989-02-16 | Festo Kg | Stromversorgungseinrichtung mit verschiedenartigen, daran anschliessbaren elektrowerkzeugen |
| SE8802566L (sv) * | 1988-07-08 | 1990-01-09 | Atlas Copco Tools Ab | Motordrivet verktyg och drivsystem foer detta |
| DE3913266A1 (de) * | 1989-04-22 | 1990-10-25 | Bosch Gmbh Robert | Schaltungsanordnung fuer kraftfahrzeuge mit mehreren elektrischen verbrauchern |
| DE4225534A1 (de) * | 1992-08-01 | 1994-02-03 | Rolf Gnauert | Anordnung zum Betreiben, Steuern und Überwachen von Elektromotoren in untertägigen Betrieben |
-
1999
- 1999-02-05 DE DE19904776A patent/DE19904776A1/de not_active Withdrawn
-
2000
- 2000-02-02 EP EP00909134A patent/EP1148977B1/de not_active Expired - Lifetime
- 2000-02-02 AU AU31521/00A patent/AU3152100A/en not_active Abandoned
- 2000-02-02 ES ES00909134T patent/ES2187450T3/es not_active Expired - Lifetime
- 2000-02-02 DE DE50001088T patent/DE50001088D1/de not_active Expired - Lifetime
- 2000-02-02 AT AT00909134T patent/ATE231048T1/de not_active IP Right Cessation
- 2000-02-02 WO PCT/EP2000/000819 patent/WO2000045995A2/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| ES2187450T3 (es) | 2003-06-16 |
| EP1148977A2 (de) | 2001-10-31 |
| DE19904776A1 (de) | 2000-08-10 |
| EP1148977B1 (de) | 2003-01-15 |
| DE50001088D1 (de) | 2003-02-20 |
| ATE231048T1 (de) | 2003-02-15 |
| WO2000045995A3 (de) | 2000-11-16 |
| AU3152100A (en) | 2000-08-25 |
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