WO2016030949A1 - Appareil de capteur et dispositif à système de capteurs - Google Patents

Appareil de capteur et dispositif à système de capteurs Download PDF

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Publication number
WO2016030949A1
WO2016030949A1 PCT/JP2014/072170 JP2014072170W WO2016030949A1 WO 2016030949 A1 WO2016030949 A1 WO 2016030949A1 JP 2014072170 W JP2014072170 W JP 2014072170W WO 2016030949 A1 WO2016030949 A1 WO 2016030949A1
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WIPO (PCT)
Prior art keywords
sensor
unit
information
sensor device
interface unit
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PCT/JP2014/072170
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English (en)
Japanese (ja)
Inventor
智史 高塚
聖貴 西井
Original Assignee
株式会社エスジー
Priority date (The priority date 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 date listed.)
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Application filed by 株式会社エスジー filed Critical 株式会社エスジー
Priority to PCT/JP2014/072170 priority Critical patent/WO2016030949A1/fr
Priority to JP2016545107A priority patent/JP6319823B2/ja
Publication of WO2016030949A1 publication Critical patent/WO2016030949A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/249—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems

Definitions

  • the present invention relates to a sensor device having a sensor unit for measuring a physical quantity and a device for a sensor system.
  • a sensor system as shown in FIG. 8 has been adopted in order to detect a physical quantity such as a rotational position or speed of a measurement object in a manufacturing facility.
  • the sensor 1 shown in the figure is connected to a connection device 3 via the sensor cable 1a and the extension cable 2.
  • the connected device 3 includes a display unit 3a and an operation unit 3b as a man-machine interface, and an output unit for outputting signals to other devices such as a host unit.
  • connection device 3 detects a rotation angle based on the detection signal of the sensor 1 and displays the rotation angle on the display unit 3a or outputs a phase A or phase B. Functions as an encoder. JP 2010-002250 A
  • connection device 3 In the connection device 3 described above, information is exchanged between the sensor system and the operator by performing display on the display unit 3a and input operation on the operation unit 3b.
  • this sensor system there is a problem that an installation space for the connection device 3 is required, the number of parts and the installation cost increases, and the entire wiring including the cables 1a and 2 becomes complicated.
  • the response from the sensor 1 cannot be obtained, it may take a long time to solve the problem. That is, in this case, there are various factors such as failure of the sensor 1 and the connection device 3, attachment of an unauthorized sensor, connection error of the cables 1a and 2 in the sensor system, malfunction of the power supply system due to voltage drop, and the like. For this reason, in order to identify the cause, a worker who is not involved in the design of the manufacturing facility is forced to perform a very difficult operation.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sensor device and an apparatus for a sensor system that can be downsized as a whole and can accurately grasp information relating to the sensor. is there.
  • the sensor device includes a detection circuit for a detection signal of the sensor unit, A first interface unit that outputs information based on a detection signal processed by the control circuit; a storage unit that stores sensor information related to the sensor device; and an interface unit that is separate from the first interface unit.
  • a second interface unit that outputs information based on the detection signal processed by the control circuit and / or sensor information stored in the storage means as a serial data signal,
  • the first interface unit is provided as an original interface unit of the sensor device, and the second interface unit is an interface for connecting the serial data signal to an external device as needed. It is equipped as a part.
  • the sensor device since the sensor device has a built-in control circuit, for example, digitization of various signals and sharing of wiring with a higher-level device can reduce wiring and reduce costs. It becomes possible, and the occupied space as a whole can be made as compact as possible.
  • the detection information and sensor information can be held in the storage means, and only the sensor unit is not separated and replaced by the user, and no mounting error occurs, so that accurate information is grasped. Can do. Then, the information is output as a serial data signal to the external device via the second interface unit.
  • the influence of noise or the like can be suppressed and the behavior of the sensor unit can be reliably grasped, and the problem can be solved smoothly when the system is started up or when a problem occurs.
  • the second interface unit is connected so that it can be transmitted to an external device as necessary, and can be used simultaneously in parallel with the original first interface unit of the sensor device. It can be easy to use.
  • the 1st Embodiment is a figure showing the schematic structure of the sensor system containing a sensor device Flow chart showing the flow of main processing in the sensor device Flow chart showing the flow of interrupt processing
  • FIG. 1 equivalent view showing the second embodiment (A)-(d) is the schematic which shows the modification of a serial data output part, a transmission module, or a receiving part.
  • 10 is a sensor device
  • 17 is a control circuit
  • 19 is a first interface unit
  • 20 is a storage unit
  • 21 is a detection unit
  • 23 is a second interface unit (serial communication unit)
  • 30, 40, 41, and 67 are external devices.
  • a device, 31 is a receiving unit
  • 32 is a display unit
  • 36 and 37 are transmitting units
  • 50, 50 ', 54, 60 and 63 are transmitting modules
  • 52, 55a and 64 to 66 are non-contact communication means.
  • FIGS. 1 to 3 a first embodiment of a sensor system applied to a field network of FA (Factory Automation) for the sensor device 10 of the present disclosure will be described with reference to FIGS. 1 to 3.
  • the sensor device 10 uses, for example, a rotation detector that detects a rotation angle as a physical quantity to be measured.
  • the outer case 10b of the sensor device 10 and the rotating shaft 10a are schematically shown.
  • the sensor device 10 includes a stator 11 provided on the outer case 10b and a rotor 12 provided on a shaft 10a serving as a sensor shaft.
  • the stator 11 is provided with detection coils 13 a and 13 b and an excitation coil 13 c
  • the rotor 12 is provided with a rotor coil 14.
  • the rotor 12 is provided with a transformer coil portion connected to the rotor coil 14, and an excitation signal is supplied to the transformer coil portion from the excitation coil 13c in a non-contact manner.
  • These transformer coil section and exciting coil 13c constitute a rotary transformer.
  • the rotor coil 14 is excited by the action of the rotary transformer.
  • a sine wave phase output signal and a cosine wave phase output signal that are amplitude-modulated according to the rotation of the shaft 10a are induced in the detection coils 13a and 13b.
  • the tan ⁇ is obtained from the sine wave sin ⁇ and the cosine wave cos ⁇ , and the arc tangent is obtained to calculate the rotation angle ⁇ of the shaft 10a.
  • the sensor device 10 is a single-phase excitation / 2-phase output amplitude modulation type electromagnetic induction type sensor, and an induced voltage induced by a change in the relative position between the coils 13a and 13b and the coil 14 described above.
  • the rotational position is detected based on Note that 2-phase excitation / 1-phase output, that is, a phase modulation type in which the phase of the output signal changes in proportion to the rotation angle ⁇ by inputting AC signals having the same amplitude but different phases to the two phases on the excitation side.
  • the rotary transformer portion may have a capacitive coupling type configuration.
  • the signal format of the above-described one-phase excitation / two-phase output (or two-phase excitation / one-phase output) is used, and the absolute position within one rotation is detected as the absolute rotation position based on the output detection signal. It is supposed to be configured. Note that a multi-rotation detection type configuration that simultaneously detects the rotation speed and rotation angle (absolute position) of the shaft 10a may be employed. In this case, for example, a reduction gear (not shown) is provided on the shaft 10a, and the count is incremented for each rotation. To count the number of revolutions.
  • the sensor device 10 accommodates the stator 11 and the rotor 12 and the detection circuit board 15 in one case 10b.
  • a controller 17 as a control circuit is mounted on the detection circuit board 15 disposed in the case 10b.
  • the controller 17 is composed of, for example, a microcomputer, an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), and the like, and controls the entire apparatus 10 and executes detection processing including the arithmetic processing described above. These various controls may be executed in cooperation with not only the controller 17 but also other control circuits.
  • Detecting coils 13a and 13b and an exciting coil 13c are connected to the controller 17 via a sensor interface (I / F) 16.
  • the controller 17 is connected to an internal power supply circuit 18, a voltage monitoring circuit 18 a, a network I / F 19, a memory unit 20, a temperature sensor 21, a setting input unit 22, and a serial data output unit 23.
  • the sensor unit includes the stator 11 and the rotor 12 including the coils 13a, 13b, and 13c.
  • the sensor unit is not limited to such a magnetic rotational position detection means, and the detection principle may be any principle such as electrostatic, optical, ultrasonic or microwave detection. May be.
  • the measurement target may be any of physical quantities related to angles (position, velocity, acceleration), physical quantities related to linear displacement (position, velocity, acceleration), and other physical quantities may be detected.
  • the sensor I / F 16 is a circuit connected to the sensor unit and the controller 17 (digital circuit) at the subsequent stage.
  • the sensor I / F 16 includes an operational amplifier circuit (excitation circuit, amplification circuit, oscillation circuit), an A / D converter, a D / A converter, a reference voltage circuit, and the like, and an abnormality diagnosis circuit for the sensor unit is provided as necessary. It is done.
  • the internal power supply circuit 18 transforms and stabilizes the power supplied from the external power supply outside the sensor device 10 as necessary, and supplies it to each internal circuit.
  • the voltage monitoring circuit 18a monitors the supply voltage, and includes a comparator that compares it with a threshold value corresponding to a specified voltage. If an abnormality is detected based on the output of the comparator, a failure is prevented in advance by shutting off the power supply.
  • the voltage monitoring circuit 18a may be configured to include an A / D converter.
  • the memory unit 20 is composed of FRAM (Ferroelectric Random Access Memory (registered trademark)) as a nonvolatile memory.
  • the FRAM has functions of both a ROM as a read-only memory and a RAM that temporarily stores data.
  • the memory unit 20 serving as a storage unit may be composed of a ROM, a RAM, and an EEPROM (Electrically Erasable Programmable ROM) instead of the FRAM, or a flash ROM.
  • the memory unit 20 may hold volatile memory contents using a battery in order to realize a nonvolatile function.
  • the memory unit 20 stores a control program and correction values for improving the linearity between the rotational position and the output value, and stores manufacturing information, setting information, and the like of the sensor device 10. Is done.
  • the temperature sensor 21 is a detecting means for detecting temperature as an external environment or an internal environment of the sensor device 10. As described above, since the detection circuit board 15 on which the semiconductor component is mounted is accommodated in the sensor device 10, it may be affected by an environment such as heat. Therefore, when the manufacturing equipment is operating, the controller 17 outputs the information when the controller 17 determines that the temperature exceeds a certain value based on the output signal of the temperature sensor 21. Thereby, a warning display etc. can be performed by using an external device, which will be described later, as a notification means, and the sensor device 10 can have a useful configuration for maintaining soundness.
  • the setting input unit 22 is an operation switch that can be operated from a hole (not shown) formed in the outer case 10b.
  • the outer case 10b may be a split type and may be an operation switch that is operated by removing one of the cases.
  • the setting input unit 22 is configured, for example, as a switch for setting a sensor function by a user, setting a function according to a product model (specification) at the time of factory shipment, or realizing an adjustment function at the time of manufacture. .
  • the network I / F 19 is connected to, for example, a PLC (Programmable Logic Controller) as an upper unit (not shown) via a control system network.
  • a PLC Programmable Logic Controller
  • information based on a detection signal processed by the controller 17 is transmitted from the network I / F 19 to the field bus 19a.
  • various measurement / control devices such as the sensor device 10 are field devices, and the field bus 19a connects these field devices and a higher-level field device (for example, PLC) with one type of cable. .
  • the field network it is possible to reduce wiring and reduce costs by digitizing each signal and sharing wiring. Further, according to this, the standard of the field device is clear and the connection and maintenance thereof are easy, and various devices can coexist on the field bus 19a. Furthermore, the integration of the sensor unit and its detection circuit and the formation of a field network combine to make the occupied space including the wiring as compact as possible, and to construct a highly rational system.
  • the field network can use general-purpose Ethernet (registered trademark) or the like, and may be configured as a broad network.
  • the network I / F 19 outputs at least one of binary type (parallel) output, analog output, switch signal output, and pulse output as the original external I / F (first interface unit) of the sensor device 10.
  • a plurality of signal output units are provided.
  • the switch signal output is turned on / off at a rotation angle set by the user based on the rotation angle ⁇ as absolute data.
  • a cam limit switch that is a mechanical cam
  • such on / off timing setting requires troublesome work such as position adjustment of its constituent elements. This can be easily performed by a user input operation, and the set value can be stored in the ROM of the memory unit 20.
  • the pulse output is a so-called A-phase and B-phase pulse signal, which is generated based on the absolute data.
  • the serial data output unit 23 is a serial communication unit (second interface unit) that outputs detection information detected by the controller 17 and sensor information stored in the memory unit 20 as a serial data signal to an external device. is there. Specifically, the controller 17 calculates the rotation angle ⁇ as a digital position signal based on the detection signals of the detection coils 13a and 13b. The digital position signal is converted into a serial data signal by the serial data output unit 23, and the serial data signal is output to the receiving unit 30 via the communication cable 24.
  • the circuit configuration is relatively simple and inexpensive, and an increase in circuit space is suppressed as much as possible.
  • the detection information or sensor information includes information on speed and acceleration, and sensor unit abnormality, which is calculated and detected by the controller 17 based on the detection signal. Further, as detection information or sensor information, the temperature detected by the temperature sensor 21, the supply power supply voltage detected by the voltage monitoring circuit 18a (voltage monitoring IC), operation information (elapsed time since power-on, total of the axis 10a) Rotation number / total movement amount), communication state (command contents, error state) in the network, manufacturing information / setting information of the sensor device 10 and the like. Among these, the manufacturing information includes the model / specification of the device 10, the device ID (serial number), the program version, and the manufacturing date, and the setting information includes setting information in the setting input unit 22 and default values (internal adjustment values). )including.
  • Such detection information and sensor information can be stored in the memory unit 20 and permanently understood.
  • the sensor unit is configured integrally with the controller 17 and is closed, so that only the sensor unit is not separated and replaced by the user, and no mounting error occurs, so accurate information including aging can be maintained.
  • the information is converted into serial data by the serial data output unit 23 as described above, and transmitted to the receiving unit 30 by wire.
  • the serial data output unit 23 is an independent output unit different from the network I / F 19 of the sensor device 10, and detects the detection information by connecting the receiving unit 30 (communication cable 24) as necessary. And sensor information can be read out and the behavior of the sensor unit can be reliably grasped.
  • the output impedance of the serial data output unit 23 is 100 ⁇ , for example, and a commercially available communication cable 24 is used.
  • the serial data output unit 23 outputs with one signal line using a clock signal, or outputs with two signal lines, a serial clock line and a serial data line.
  • the serial data output unit 23 may be configured to be insulated from the controller 17 side, and noise can be reduced by this insulation.
  • a superimposed signal obtained by superimposing a DC voltage on serial data may be transmitted to the receiving unit 30 via the communication cable 24.
  • the receiving unit 30 can extract the DC voltage from the superimposed signal and generate its own power supply voltage.
  • the receiving unit 30 is an external device that forms a sensor system together with the sensor device 10. As shown in FIG. 1, the receiving unit 30 includes a receiving unit 31 that receives the serial data signal and shapes the waveform, a display unit 32 formed of, for example, a liquid crystal display (LCD), and an operation input unit 33 operated by a user. And are provided.
  • the controller 34 of the receiving unit 30 is connected to the receiving unit 31, the display unit 32, and the operation input unit 33, an internal power supply circuit 35, a USB (Universal Serial Bus) I / F 36, an analog I / F 37, A memory unit 38 is connected.
  • the internal power supply circuit 35 transforms and stabilizes the power supplied from the external power supply (or the superimposed signal) as necessary and supplies it to each internal circuit.
  • the memory unit 38 includes a volatile memory and a nonvolatile memory.
  • the controller 34 of the receiving unit 30 converts the serial data signal into a digital position signal, for example, and displays the detection information and sensor information on the display unit 32. I do. Also, based on the input from the operation input unit 33, display contents on the display unit 32 can be set, various modes such as auto power off (power saving mode) can be set, and analog output scaling can be performed.
  • the USB I / F 36 and the analog I / F 37 function as a transmission unit for outputting data corresponding to the communication standards of the peripheral devices 40 and 41 to the other peripheral devices 40 and 41. That is, communication conforming to the USB standard is performed between the receiving unit 30 and the upper unit (for example, a PC (personal computer) 40) via the USB I / F 36. In addition, communication conforming to the analog communication standard is performed between the receiving unit 30 and the waveform monitoring device 41 via the analog I / F 37.
  • FIGS. 2 and 3 show the flow of processing of the control program executed by the controller 17 of the sensor device 10.
  • the controller 17 calculates the absolute position of the shaft 10a based on the detection signals of the detection coils 13a and 13b in the main process. (Steps S1, S2). In this case, the controller 17 calculates the rotation angle ⁇ of the shaft 10a as a digital position signal (absolute data). Further, the controller 17 acquires input signals from the temperature sensor 21 and the voltage monitoring circuit 18a, information on the memory unit 20 and the sensor unit, and communication information via the network I / F 19 (step S3).
  • the controller 17 determines the presence or absence of an error based on the input signal and various information acquired in step S3 (step S4).
  • the data of the memory unit 20 is overwritten and updated with respect to the rotation angle ⁇ , the detected temperature, and the supply voltage, or the communication information is stored in the memory unit 20 (Ste S5).
  • processing corresponding to the error is executed (step S4).
  • step S6 processing corresponding to the error is executed (step S4).
  • the contents of the error are stored in the memory unit 20.
  • step S7 the data buffer output as serial data is updated, and the serial data is output to the receiving unit 30 (step S8).
  • the receiving unit 30 can visually recognize the rotation angle ⁇ , the detected temperature, and the like on the display unit 32 based on the received serial data. Further, the information such as the rotation angle ⁇ and the detected temperature can be monitored by the waveform monitor device 41 by managing data by the PC 40 which is a peripheral device.
  • FIG. 3 shows the contents of the interrupt process executed based on the command (instruction) input from the host unit via the network I / F 19.
  • the controller 17 reads and analyzes the command from the upper unit. In this case, the presence or absence of an error is determined in the same manner as in steps S4 and S6, and if an error has occurred, the error process is executed (steps S12 and S13).
  • the controller 17 responds to the command content. For example, if the upper unit requests the detection information or sensor information (rotation angle ⁇ , information on abnormality of sensor unit, temperature, operation information, manufacturing information, etc.) via the network I / F 19, a response is obtained. .
  • the sensor device 10 since the sensor device 10 only constitutes a part of the FA system, in the processing of the steps S11 to S14, no response is obtained from the device 10 when the sensor device 10 fails, for example, as a single device 10 It may happen that the behavior of is difficult to grasp.
  • the serial data output unit 23 since the serial data output unit 23 is prepared in addition to the network I / F 19, all information of the sensor device 10 such as detection information and sensor information can be confirmed by the receiving unit 30 or the like. Therefore, even an operator who is not familiar with the system can smoothly solve problems such as failure of the sensor device 10.
  • the sensor device 10 includes a control circuit (controller 17) that processes the detection signal of the sensor unit, and outputs information based on the detection signal processed by the control circuit.
  • a first interface unit storage means for storing sensor information relating to the sensor device 10, and an interface unit different from the first interface unit, and / or information based on a detection signal processed by the control circuit
  • a second interface unit that outputs the sensor information stored in the storage unit as a serial data signal.
  • the first interface unit is provided as an original interface unit of the sensor device 10, and the second interface unit is connected so that a serial data signal can be transmitted to an external device as necessary. Equipped as an interface part to do.
  • the sensor device 10 since the sensor device 10 has a built-in control circuit, for example, it is possible to reduce wiring and reduce costs by digitizing various signals and sharing wiring with upper devices.
  • the occupied space can be made as compact as possible.
  • the detection information and sensor information can be held in the storage means, and only the sensor unit is not separated and replaced by the user, and no mounting error occurs, so that accurate information is grasped. Can do. Then, the information is output as a serial data signal to the external device via the second interface unit. For this reason, it is possible to reliably grasp the behavior of the sensor unit while suppressing the influence of noise and the like.
  • the operation of the sensor unit can be grasped based on the serial data signal, and the problem can be solved smoothly when the system is started up or when a problem occurs. It can be carried out. That is, for example, an abnormality of the sensor unit or the detection circuit board 15, a problem of network connection (address setting error or connection error, etc.), a power supply system failure such as a voltage drop occurs, and the sensor device 10 connected to the network completely Even when no response is obtained, the behavior of the sensor unit can be grasped based on the serial data signal.
  • the second interface unit is connected so that it can be transmitted to an external device as necessary, and can be used simultaneously in parallel with the original first interface unit of the sensor device. It can be easy to use.
  • the sensor device 10 includes detection means (for example, a temperature sensor 21) for detecting an external environment or an internal environment of the device 10 separately from the sensor unit.
  • detection means for example, a temperature sensor 21
  • the detection means can grasp the external environment or the internal environment of the sensor device 10 and can quickly identify a failure or the like, which is useful for maintaining the soundness of the device 10. It can be.
  • the sensor information includes at least information on specifications of the sensor device 10, device ID, and settings related to the sensor unit. According to this, the operator can acquire such information from the sensor device 10, and it can be made practically useful, such as improving the maintainability.
  • the receiving unit 30 is an external device that constitutes a sensor system together with the sensor device 10.
  • the receiving unit 30 receives a serial data signal, and based on the serial data signal received by the receiving unit 31, detection information and / or Or the display part 32 which displays sensor information, and the transmission part (for example, USBI / F36 and analog I / F37) for outputting the data according to the communication standard of the said peripheral device with respect to another peripheral device are provided.
  • the transmission part for example, USBI / F36 and analog I / F37
  • the detection information and sensor information can be confirmed on the display unit 32 of the receiving unit 30, and even an operator who is not familiar with the production system related to the sensor device 10 can avoid the above-described malfunction.
  • the problem can be solved more smoothly.
  • the receiving unit 30 having the above-described configuration, it is possible to receive a serial data signal from the sensor device 10 and accurately and accurately detect various types of information including the behavior of the sensor unit.
  • the operation of the device 10 can be confirmed regardless of whether the sensor device 10 is connected to the network.
  • the receiving unit 30 (communication cable 24) can be disconnected from the sensor device 10 as necessary.
  • the reception unit 30 can also check the access state to the sensor device 10 from the network, which is also effective for checking the soundness of the network processing. It is.
  • the receiving unit 30 includes a memory unit 38 for storing information related to the serial data signal. Data related to this memory unit 38 can be accumulated to have a function as a data logger. For example, the detection information obtained in the field by the receiving unit 30 can be confirmed on a desk. Even if the sensor device 10 is installed in the interior of the manufacturing facility and the device 10 cannot be checked at the installation location, if the communication cable 24 is laid in a place where the operator can easily approach, the periodic inspection is performed. Can also be done easily.
  • the command system from the serial data output unit 23 to the receiving unit 30 is unified. That is, in general, there are many cases in which the command system is different between the sensor device and the external device. Even in such a case, the receiving unit 30 can use various sensor devices without using a command conversion means between them. Can be recognized, and versatility can be improved.
  • the sensor device 10 detects the rotational position (or the position of the linear displacement) with high accuracy and high resolution, and the physical quantity such as the position and velocity acceleration is also highly accurate with high speed response. An excellent and reliable general-purpose measuring instrument can be obtained.
  • FIG. 4 is a view corresponding to FIG. 1 illustrating the second embodiment, in which a transmission module 50 is provided between the sensor device 10 and the reception unit 30.
  • the transmission module 50 includes a receiving unit 51 that receives a serial data signal and shapes the waveform, and a light emitting element 52 that converts the received signal into an optical signal and irradiates it.
  • the light emitting element 52 is a non-contact communication unit configured by a light emitting diode (which may be infrared light emitting) that emits light by an electric signal supplied from the receiving unit 51.
  • a photodiode 53 as a light receiving unit is connected to the receiving unit 31 of the receiving unit 30 via a detection circuit 56.
  • the photodiode 53 passes a current according to the intensity of light output from the light emitting element 52
  • the detection circuit 56 is a current-voltage conversion circuit including an operational amplifier and a feedback resistor.
  • the receiving unit 30 When the receiving unit 30 is configured to be portable by an operator, the receiving unit 30 performs alignment (optical axis alignment) with the transmission module 50 and confirms whether or not the optical signal is received by the display unit 32.
  • alignment optical axis alignment
  • the electrical signal is converted into an optical signal by the light emitting element 52 of the transmission module 50.
  • the photodiode 53 By receiving this optical signal with the photodiode 53, the serial data signal is reproduced in the receiving unit 30. Therefore, it is possible to confirm the detection information and sensor information in the receiving unit 30, and the same effects as in the first embodiment can be obtained, such as monitoring and data management by the peripheral devices 40 and 41.
  • the transmission module 50 configures a relay device that temporarily receives the serial data signal from the sensor device 10 and transmits the received signal to an external device such as the reception unit 30, and performs non-contact communication with the external device.
  • Contact communication means is provided.
  • the non-contact communication means is not limited to the optical signal of the light emitting element 52, but may be any device that transmits a signal in a non-contact manner using magnetic coupling, electrostatic capacitance coupling, wireless communication, or the like described later.
  • the sensor device 10 and the peripheral devices 40 and 41 are completely insulated by transmitting the signal in a non-contact manner by the non-contact communication means. . For this reason, malfunctions of the sensor device 10 due to noise or the like can be suppressed as much as possible in the manufacturing facility.
  • a connection module at the time of inspection is provided by always connecting the transmission module 50 for each sensor device 10. The operation can be easily performed by omitting.
  • FIGS. 5A to 5D show a modification of the second embodiment
  • FIG. 5A shows an outline of the configuration around the transmission module 50 ′.
  • the transmission module 50 ′ uses a light emitting element 52, and has a simple and inexpensive configuration.
  • a LAN cable having a characteristic impedance of 100 ⁇ is used as the communication cable 24 from the viewpoint of availability, cost, and long-distance pulse transmission.
  • a configuration that matches the characteristic impedance of the communication cable 24 can be adopted as will be described later.
  • a coil 55a constituting an insulating transformer 55 is used instead of the light emitting element 52. That is, the primary side coil 55a provided in the transmission module 54 and the secondary side coil 55b provided in the reception unit 30 are opposed to and separated from each other. Thus, a signal is transmitted between the transmission module 54 and the reception unit 30 in a non-contact manner by the magnetic coupling means between the primary side coil 55a and the secondary side coil 55b.
  • an encoder (not shown) for converting the serial data signal into a Manchester code (a code having a low DC component) is provided on the sensor device 10 side (serial data output unit 23 side).
  • the receiving unit 30 is provided with a decoding unit 57 that decodes (demodulates) Manchester code.
  • the Manchester code is changed from a high level to a low level or from a low level to a high level at the center of the bit interval for the logical values 1 and 0. Thereby, the direct current component of the transmission signal can be eliminated, and a configuration suitable for magnetic coupling can be obtained.
  • the signal transmission path by the communication cable 24 is shown as one system.
  • a process of separating and extracting the clock signal superimposed on the data signal received on the receiving unit 30 side is executed.
  • Manchester encoding is performed.
  • the number of connection lines is small and a simple configuration can be achieved.
  • the signal transmission path may transmit a clock signal and a data signal in two systems. In this case, data communication can be performed at a higher speed than in the case of one system.
  • a system capable of high-speed transmission at, for example, 10 Mbps (bit per second) or more can be constructed using a commercially available device.
  • the directivity of light is high, and even if there are a plurality of light sources, it is difficult to interfere with each other.
  • the optical type does not need to consider a wireless communication standard, and the transmission circuit and the reception circuit can be simplified.
  • 5C and 5D show noise suppression means in the sensor device 10.
  • reference numeral 23a in the figure indicates a buffer for outputting a serial data signal.
  • reactors 58 and 58 as common mode chokes are inserted in the pair of signal lines L1 and L2 in FIG.
  • Reactors 58 and 58 have the same characteristic values and are disposed on the respective signal lines L1 and L2, thereby providing not only a harmonic suppression function but also a common mode reactor in the serial data output unit 23. Also works.
  • a pulse transformer 59 is disposed in the serial data output unit 23 shown in FIG.
  • the DC component of the transmission signal is eliminated by providing an encoding unit that converts the serial data signal into Manchester code as described above.
  • unnecessary noise components can be blocked in the pulse transformer 59, and an encoded signal having no DC component can be transmitted to the external device side as the secondary side.
  • FIG. 6 shows the transmission module 60 of the third embodiment together with the serial data output unit 23.
  • the serial data output unit 23 is configured to output a DC voltage superimposed on the serial data signal (see voltage v in the waveform diagram on the communication cable 24 in FIG. 6).
  • the reception unit 61 of the transmission module 60 includes a waveform shaping circuit 62 that turns on and off the light emitting element 52 based on the input pulse signal.
  • a capacitor Cx connected in series to the waveform shaping circuit 62 and a resistor Rx connected in parallel to the waveform shaping circuit 62 are provided between the input terminal P1 and the waveform shaping circuit 62.
  • the inductor Lx connected in parallel with the capacitor Cx has a relatively large inductance value and smoothes it to a DC voltage + V2 having no ripple.
  • This + V2 is a power supply voltage in the transmission module 60 and is supplied to the internal circuit 62.
  • the DC component of the serial data signal is cut by the capacitor Cx, and only the AC (pulse) component is input to the waveform shaping circuit 62.
  • Rx is an input resistance for the AC component
  • the input impedance in the transmission module 60 is substantially Rx.
  • the transmission module 63 further includes a data conversion circuit 64 and a wireless communication circuit 65 that operate based on the power supply voltage + V2, and an antenna 66 as non-contact communication means. Based on the signal shaped by the waveform shaping circuit 62, a carrier wave in a predetermined frequency band is modulated via the data conversion circuit 64 and the wireless communication circuit 65, and transmitted from the antenna 66 to the external device side. At this time, for example, communication is performed by wireless communication corresponding to a predetermined wireless communication standard based on Bluetooth (registered trademark). Thereby, it can receive with the communication terminal (smart phone 67) etc. as an external apparatus shown in FIG. 7, the various information mentioned above can be visually recognized on the display screen, and a dedicated receiving unit becomes unnecessary.
  • the communication cable 24 is not limited to a twisted cable in which a pair of signal lines shown in FIGS. 6 and 7 is twisted, and may be two pairs of signal lines. In this case, the same function as that of the pair of signal lines can be obtained even if the DC signal and the serial data signal are transmitted independently on the two pairs of signal lines.
  • the present invention is not limited to the embodiments described above or shown in the drawings, and various modifications or expansions are possible.
  • the transmission module is not limited to the configuration including the non-contact communication means, and may be configured to be connected to the reception unit by wire, for example.
  • the external device is not limited to the receiving unit 30, the smartphone 67, and other peripheral devices 40 and 41, and a commercially available device that can communicate with a predetermined communication standard can be used. Even in this case, data signals can be exchanged using the above-described highly versatile transmission module as a communication means.
  • the present invention can be implemented with appropriate modifications such as using other detection means for detecting the external environment or the internal environment instead of the temperature sensor 21.
  • the present invention is useful for sensor devices.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

La présente invention concerne un appareil (10) de capteur muni des éléments suivants: une première unité (19) d'interface qui délivre des informations basées sur un signal de détection traité par un circuit (17) de commande; un moyen (20) de stockage qui stocke des informations de capteur se rapportant à l'appareil (10) de capteur; et une deuxième unité (23) d'interface qui est distincte de la première unité (19) d'interface et qui délivre, sous la forme d'un signal de données en série, les informations basées sur le signal de détection traité par le circuit (17) de commande et/ou les informations de capteur stockées par le moyen (20) de stockage. La première unité (19) d'interface est incorporée à l'appareil (10) de capteur en tant que principale unité d'interface de celui-ci, et la deuxième unité (23) d'interface est incorporée en tant qu'unité d'interface destinée à être connectée selon le besoin de telle façon que ledit signal de données en série puisse être envoyé au dispositif externe.
PCT/JP2014/072170 2014-08-25 2014-08-25 Appareil de capteur et dispositif à système de capteurs WO2016030949A1 (fr)

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PCT/JP2014/072170 WO2016030949A1 (fr) 2014-08-25 2014-08-25 Appareil de capteur et dispositif à système de capteurs
JP2016545107A JP6319823B2 (ja) 2014-08-25 2014-08-25 センサ装置及びセンサシステム用の機器

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PCT/JP2014/072170 WO2016030949A1 (fr) 2014-08-25 2014-08-25 Appareil de capteur et dispositif à système de capteurs

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Publication number Priority date Publication date Assignee Title
JP2020113602A (ja) * 2019-01-09 2020-07-27 株式会社東芝 半導体装置

Families Citing this family (2)

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CN107431009B (zh) * 2015-03-26 2020-10-27 三菱电机株式会社 半导体装置的制造方法
FR3045833B1 (fr) 2015-12-18 2018-02-09 Electricite De France Dispositif de controle et de mesure de defauts de soudure d'une paroi cylindrique et procede qui en fait usage

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JPH10293895A (ja) * 1997-03-18 1998-11-04 Dr Johannes Heidenhain Gmbh 位置測定装置と評価ユニットの間でデータを送信する方法とその装置
JPH11514091A (ja) * 1996-07-10 1999-11-30 ドクトル・ヨハネス・ハイデンハイン・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 位置決め方法およびそれに適した測定システム
WO2005015144A1 (fr) * 2003-08-12 2005-02-17 T & D Corporation Dispositif de mesure
JP2006170625A (ja) * 2004-12-10 2006-06-29 Ntn Corp 回転センサ付き軸受
JP2006208133A (ja) * 2005-01-27 2006-08-10 Seiko Epson Corp データロギング装置

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JPH11514091A (ja) * 1996-07-10 1999-11-30 ドクトル・ヨハネス・ハイデンハイン・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 位置決め方法およびそれに適した測定システム
JPH10293895A (ja) * 1997-03-18 1998-11-04 Dr Johannes Heidenhain Gmbh 位置測定装置と評価ユニットの間でデータを送信する方法とその装置
WO2005015144A1 (fr) * 2003-08-12 2005-02-17 T & D Corporation Dispositif de mesure
JP2006170625A (ja) * 2004-12-10 2006-06-29 Ntn Corp 回転センサ付き軸受
JP2006208133A (ja) * 2005-01-27 2006-08-10 Seiko Epson Corp データロギング装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020113602A (ja) * 2019-01-09 2020-07-27 株式会社東芝 半導体装置

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