Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
  • G01B3/22—Feeler-pin gauges, e.g. dial gauges
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
  • G01B2210/58—Wireless transmission of information between a sensor or probe and a control or evaluation unit
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2209/00—Arrangements in telecontrol or telemetry systems
  • H04Q2209/80—Arrangements in the sub-station, i.e. sensing device

Definitions

• the invention relates to a measuring device that can be designed as a caliper gauge, a dial gauge or a micrometer.
• the measuring device is used for example for length measurement. It has a housing on which a
• the position of the transducer By changing the position of the transducer, an electrical measurement signal is generated in the measuring device via a measuring circuit.
• the position of the transducer can be changed by a movement or deformation, for example, a linear displacement or pivoting movement.
• the measuring device can be a display or another
• the transceiver can record a field device signal at a field device interface and send it via a radio interface.
• a field device signal for example, measured values.
• Measuring device for handheld instruments which are carried by an operator and used when needed, the
• the measuring device has a
• the measuring device has a
• acoustic and / or optical output unit e.g. one
• Display via which the measured value of the operator person corresponding to the measurement signal can be displayed.
• this also be transmitted wirelessly and preferably by radio to a central unit.
• This is a transmission circuit
• Measuring device can be transmitted wirelessly to the central unit. Both the transmission circuit, as well as the
• Measuring circuit are in the common housing of the
• Measuring device arranged, preferably on one
• the measuring device can transmit measured values wirelessly.
• An external transmitter or an external antenna omitted and do not interfere with the handling of the measuring device. Besides, one is from the outside
• Housing protection design can be realized as a dust-proof or dustproof and / or water-resistant housing. If necessary, it is also possible to
• the power supply circuit has an energy store, for example a battery or a
• This energy store is used both to provide a supply voltage for the transmission circuit, as well as a supply voltage for the measuring circuit.
• the power supply circuit can in particular be arranged on a common circuit board with the transmission circuit and / or the measuring circuit. A double power supply for the measuring circuit and the transmission circuit is eliminated, whereby space can be saved and all components can be arranged to save space in a common housing. Because only a single
• Energy storage for power supply is available, also sufficient for a single closable opening on the housing for replacing the energy storage, which this can be done very easily in the appropriate housing protection design.
• a first supply line of the voltage supply circuit connected to the transmission circuit is connected directly to the
• Supply voltage applied It can be one with the
• Measuring circuit connected second supply line via an ohmic resistance to the supply voltage. It is advantageous if the second
• the capacitor serves to buffer the voltage applied to the second supply line
• Supply voltage to the second supply line affect the measurement signal
• the transmission circuit preferably transmits at a
• Frequency of 2.4GHz which is a license free operation of the Measuring device allows.
• the radiated transmission power can be limited to 1 mW.
• the transmission mode can be displayed in the display device of the measuring device.
• the measuring device may also have a receiving circuit, which can be realized in particular with the transmission circuit as an integrated executed transmitting and receiving circuit with a common antenna. It is advantageous if the central unit receives the complete and / or correct reception of the data by means of a
• Confirmation signal acknowledged which can be received in the measuring device by a receiving circuit.
• the confirmation signal received by the measuring device can be output optically or acoustically, e.g. be displayed by an information on the display unit, so that the operator can determine whether the measured values have been completely or correctly transmitted or not.
• the measuring device may also have an address memory which serves to store an address associated with the measuring device. This address is preferably part of the measured value end signal, so that the central unit receiving the measured value end signal can assign the measured value to a specific measuring device.
• the address of the measuring device is preferably predetermined by the central unit and is changeable. During initialization, the address can be transmitted by the central unit, received in the receiving circuit of the measuring device and stored in the address memory. In this way, fixed specifications of the address as well as
• Input means to the address directly in the
• measuring devices can very easily be connected to a common central unit communicate.
• Figure 1 is a highly schematic view of a
• Measuring device and a central unit
• FIG. 2 shows a block diagram-like representation of a measuring circuit, a transmitting and receiving circuit and a power supply circuit of the measuring device
• Figure 3 is a schematic block diagram similar representation of the arrangement of the circuits of Figure 2 in the housing of the measuring device and
• Figure 4 shows the timing of the timed transmission of the transmission signal following the
• FIG. 1 schematically shows a measuring device 10 in the form of a dial gauge.
• the measuring device 10 has a housing 11 from which protrudes a transducer 12.
• a transducer 12 In the embodiment of the
• Transducer 12 in a guide 13 on the housing 11 mounted linearly displaceable.
• Transducer 12 a change in position of a workpiece can be sampled.
• an electrical measuring signal M is generated in a measuring circuit 14 of the measuring device 10 (FIG. 2).
• the measured value corresponding to the measurement signal M is displayed to the operator via a display device 15.
• the measuring circuit is for this purpose over a
• Communication interface 18 is connected to the display device 15.
• a display device 15 As a display device 15 is used
• a monochromatic liquid crystal display for example, a monochromatic liquid crystal display (LCD), in particular a so-called TN-LCD or MPN-LCD.
• the display device 15 is arranged in a rotatably mounted housing part 16, so that depending on the positioning of the measuring device 10, the operator can align the display device 15 so that the displayed digits and / or letters and / or symbols are vertically aligned and not upside down or sideways, making it easier to read the readings.
• the axis of rotation runs
• Such measuring devices 10 are often used in dusty or humid environments. At the
• the housing is therefore protected against dust or dust. Besides, it can
• the change in the position S of the transducer 12 may differ from the described embodiment by a pivoting movement or deformation of the
• Transducer 12 are detected.
• the measuring device 10 can also be realized as a caliper or as a micrometer.
• the measuring circuit 14 is electrically connected to a transmission circuit 19.
• the communication interface 18 serves to transmit the measurement signal M from the measurement circuit 14 to the transmission circuit 19 (FIG. 2).
• the transmission circuit 19 serves as a wireless interface of the measuring device 10 to a central unit 20.
• the transmission circuit 19 generates based on the measurement signal M, a transmission signal U, the
• the Central unit 20 is transmitted wirelessly.
• the transmission circuit 19 an antenna 21.
• the antenna 21 is arranged in the housing 11 of the measuring device 10 and in the embodiment as a printed circuit board antenna
• the printed circuit board antenna 21 has two parallel legs 21a and 21b arranged transversely thereto
• the edge-side first leg 21 a is electrically connected to ground GND and the other second leg 21 b is electrically connected via an antenna line 26 to a transmission control unit 27.
• the antenna could also be used on the
• PCB 22 mounted component in the form of an SMD antenna be realized.
• Parallel to the longitudinal section 21c of the antenna 21 is in the region of the ends of the two legs 21a, 21b a
• Shielding arrangement 28 is provided, which shields the antenna 21 from unwanted couplings of high-frequency signals of the measuring circuit 14 and the transmitting circuit 19. This is particularly important because the measurement circuit 14 converts analog signals into digital signals, which can cause high frequency harmonics.
• the shield assembly 28 is in the embodiment by a series of
• the measuring device 10 also has, for example, a receiving circuit 23.
• the receiving circuit 23 is a circuit 23.
• the transmitting circuit 19 and the receiving circuit 23 are integrated into a transmitting and receiving circuit 24.
• Transmit and receive circuit 24 thus provides a
• Bidirectional wireless interface to the central unit 20 and can send the transmission signal U and receive signals from the central processing unit 20, for example, an initialization signal I.
• the initialization signal I is used for the first time the connection of the measuring device 10 with the central unit 20 to assign an address to the measuring device 10.
• the address is given by the CPU 20.
• the measuring device 10 has an address memory 25, in which the address received by the initialization signal I is stored.
• the address is transmitted when transmitting the transmission signal U together with the measured value, so that the central unit 20 the received measured value of a particular measuring device 10 can assign. In this way, several can
• Measuring equipment 10 wirelessly with a common
• Central unit 20 are connected.
• the addresses are specified during initialization by the central unit 20 and remain after the one-time assignment until a new initialization is obtained. Before another
• the transmission mode of the measuring device 10 during the transmission of the transmission signal U is displayed to the operator on the display device 15, for example by a symbol 17, as shown by way of example in FIG.
• Receive circuit 23 and the transmitting and receiving circuit 24 has received the confirmation signal B, the reception is displayed on the display device 15 of the operator. In the exemplary embodiment, this is done by outputting the term "data" on the display device 15. It is understood that the display of any symbols, terms, pictograms or the like is suitable for indicating the transmission mode and / or the reception of the acknowledgment signal B. Additionally or alternatively You can also use acoustic signals, but this is
• Embodiment therefore not provided because the housing 11 executed protected against dust or water shall be.
• the protection can be through a
• a voltage supply circuit 30 is provided, to which the measuring circuit 14 and the transmitting and receiving circuit 24 is connected.
• the power supply circuit 30 has an energy store 31, which is formed in particular by a battery or a rechargeable accumulator.
• the energy store 31 serves as the only energy source for the measuring device 10 and provides a supply voltage V available.
• Power supply circuit 30 is the preferred
• Receiving circuit 24 on eggs first printed circuit board part 22 a of the circuit board 22 is arranged.
• the measuring circuit 14 is arranged on a second printed circuit board part 22b of the printed circuit board 22, the two printed circuit board parts 22a, 22b being connected to one another via a flexible connecting cable 34
• the printed circuit board 22 is arranged in the housing 11 of the measuring device 10. In this case, the first printed circuit board part 22a below the
• the second printed circuit board part 22b with the measuring circuit 14 is arranged in a base part 35 of the housing 11, on which the guide 13 is provided.
• the housing part 16 can relative to the base part 35 in
• Circuit board part 22b remains stationary in the base part 35 when the housing part 16 is rotated relative to the base part 35 ( Figure 3).
• the measuring circuit 14 has an inductive example Sensor 36, which detects the position of a scale 38 and the sensor signal to a measurement control unit 42nd
• the scale 38 is part of the
• Transducer 12 and the position of the scale 38 is changed and detected by the sensor 36. A the
• Sensor signal corresponding measurement signal M can from the
• Measurement control unit 42 via the communication interface 18 and the control unit 45 for transmitting and
• Receive circuit 24 are transmitted.
• Battery compartment opening 32 also omitted and provided accessible from the outside closable cable connection 33.
• the cable connection 33 can then serve to connect the measuring device 10 to a charger and / or also serve for the wired transmission of the measurement signal M to the central unit 20 or another subscriber.
• FIG. 2 is a block diagram of FIG.
• a first supply line 37 connects the transmission and
• At the first supply line 37 is applied to a first voltage VI.
• the first supply line 37 is via a
• Resistor 39 is electrically connected to a second supply line 40.
• the second supply line 40 is connected to the measuring circuit 14.
• the second supply line 40 is connected via a capacitor 41 to ground GND.
• a second voltage V2 At the second supply line 40 is a second voltage V2 for the measuring circuit 14 at.
• the voltage supply circuit 30 ensures that the measuring signal M can be detected without being affected during the transmission of the transmission signal U. Characterized in that the first supply line 37 directly to the supply voltage V of
• Energy storage 31 is applied, can occur briefly by the transmission of the transmission signal U, a voltage drop of the first voltage VI ..
• the second voltage V2 for the measuring circuit 14 is buffered via the capacitor 41 and holds the necessary voltage value of the second voltage V2 at voltage fluctuations of the first voltage VI upright over a period of time. As a result, the charge of the capacitor 41 can be reduced.
• the capacitor 41 is charged later by a charging current through the resistor 39 later again.
• Measuring circuit 14 and the transmitting and receiving circuit 24 is assigned a common control unit 45.
• Control unit 45 may for example by a
• Microcontroller ⁇ be formed.
• the operation of the measuring circuit 14 and of the transmitting and receiving circuit 24 is controlled or coordinated via the control unit 45.
• Control unit 45 also has the address memory 25.
• the measuring device 10 can be used to extend the
• the transmission control unit 27 or the transmission and reception circuit 24 synchronizes in one
• predetermined time interval At, for example every 250 ms with the central unit 20.
• the synchronization serves the timing of the measuring device 10 to the central
• Transmission control unit 27 and the transmission and
• Receive circuit 24 are located between the
• Time synchronization signal T can for all to the
• the measuring devices 10 different sizes
• Time intervals At and transmission times are assigned.
• This first idle state of the transmission control unit 27 or the transmitting and receiving circuit 24 is terminated by the control unit 45 when a transmission request R is present. This is the case, for example, when the measuring signal M changes or when with the
• Time synchronization signal T is a request signal A from the central unit 20 is received or if by a Operator a data key 46 of the measuring device 10 is actuated.
• the measuring device 10 is caused to transmit the current applied measuring signal M by transmitting the
• Request signal A contains the address of
• Measuring device 10 for the transmission of measured values
• the received address is compared with the address stored in the address memory 25 address of the measuring device 10 and only at the next possible time a transmission signal U
• the current measured value M is queried by the control unit 45 at regular intervals at the measuring control unit 47. If there is no change in the measured value during a given period of time, there will be none
• Control unit 45 in a second idle state in which the regular measurement query is turned off. In this second idle state, the measurement control unit 42 is also at rest. As soon as the measured value M changes or another transmission request R is present, this second idle state is ended again.
• the bidirectional transmission is preferably coded, so that unauthorized persons have no access to the
• a private key is additionally deposited in the central station 20 and in the measuring device 10. Only data transmitted by this transfer key through the transfer control unit 27
• Transmission control unit 27 passed. Otherwise, the received data can not be further processed. This achieves the greatest possible data protection.
• the invention relates to a measuring device 10 in the form of a dial gauge, a caliper or a micrometer.
• the measuring device 10 has a housing 11 in which a measuring circuit 14, a transmitting circuit 19 and a receiving circuit 23 are arranged on a common printed circuit board 22.
• Reception circuit 23 use a common
• Printed circuit board antenna 21 which is also provided on the circuit board 22. Further, on the circuit board 22, a power supply circuit 20 for powering the measuring circuit 14, the transmitting circuit 19 and the
• Receiving circuit 23 is arranged. On an accessible from outside the housing 11 interface between the
• Reception circuit 23 can therefore be dispensed with.
• the common power supply circuit 30 the space for the entire circuit arrangement is reduced.
• the housing 11 of the measuring device 10 can be easily sealed and therefore in the required

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Arrangements For Transmission Of Measured Signals (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)
• Length-Measuring Instruments Using Mechanical Means (AREA)
• Transceivers (AREA)
• Transmitters (AREA)

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Citations (7)

Family Cites Families (27)

• 2011
  • 2011-04-07 EP EP11161535.7A patent/EP2508839B1/de active Active
• 2012
  • 2012-03-29 WO PCT/EP2012/055692 patent/WO2012136566A1/de not_active Ceased
  • 2012-03-29 JP JP2014503081A patent/JP2014516434A/ja active Pending
  • 2012-03-29 CN CN201280017190.7A patent/CN103534550B/zh active Active
  • 2012-09-15 US US13/620,777 patent/US8839669B2/en active Active
• 2015
  • 2015-11-16 JP JP2015223638A patent/JP6247677B2/ja active Active
• 2017
  • 2017-05-22 JP JP2017100715A patent/JP6373449B2/ja active Active

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