Apparatus and method for machine data collection

• US 6,078,874 A
• Filed: 08/04/1998
• Issued: 06/20/2000
• Est. Priority Date: 08/04/1998
• Status: Expired due to Term

• Current Assignee: Computational Systems Incorporated (Emerson Electric Company)
• Original Assignee: CSI Technology Incorporated (Emerson Electric Company)
• Inventors: Piety, Richard W., Simpson, Daniel G., Piety, Kenneth R.
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Bui, Bryan
• Application Number:
  US09/128,844
• Time in Patent Office: 686 Days
• Field of Search: 702/122, 702/141, 702/142, 702/130, 702/32, 702/56, 702/189, 702/190, 702/68, 364/708.1, 73/602, 73/660
• US Class Current: 702/122
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence
• CPC Class Codes: H04Q 2209/47 using RFID associated with sensors
• CPC Class Codes: H04Q 9/00 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

Abstract

An apparatus and method for machine data collection includes a hand-held personal computer (HPC) having route-based machine information data stored therein, and at least one hand-held sensor unit which includes a sensor for sensing an operating characteristic of the machine. The sensor unit includes a microcomputer for controlling the overall operation of the sensor unit, and a wireless communications port for wirelessly communicating with the HPC and/or other peripheral device. Wireless communications between the HPC and the sensor unit include uploading route-based machine information and instructions from the HPC to the sensor unit, and downloading collected sensor data from the sensor unit to the HPC. Data may also be manually input to the HPC, including reading from control panels and process gauges. All LCD visually displays information and instructions to the operator, and a set of headphones aurally informs and instructs the operator with regard to data collection. Data may be transmitted wirelessly from the sensor unit to the HPC as the data is being generated, or data may be stored in the sensor unit over multiple data measurement points and then downloaded to the HPC or other peripheral device. In a distributed database, the sensor unit is configured to read a bar code or memory module positioned adjacent a measurement point of the machine, and each memory module is used to store data corresponding to test point location, sensor unit analysis setup, alarm levels, route-based information, and the like.

Claims

1. A hand-held sensor unit for use by an operator to acquire operating data from a machine and for communicating acquired operating data to a peripheral device capable of wireless communications, the sensor unit comprising:

a housing configured for being hand held by an operator;

a first sensor disposed in said housing for being placed in sensory contact with a machine at a measurement location to sense a first operating characteristic of the machine during data acquisition, producing first sensor signals corresponding to the machine operating characteristic that is sensed;

a microcomputer, including memory, disposed in said housing in electrical communication with said first sensor to receive and process sensor signals, producing processed sensor data;

a wireless communications port in electrical communication with said microcomputer to provide wireless communications between the microcomputer and the peripheral device; and

a power supply disposed in said housing for supplying electrical power to the sensor unit;

wherein said housing is dimensioned and configured for being hand-held by an operator during acquisition of data with said first sensor.

2. The sensor unit of claim 1, further comprising a conditioning circuit for receiving and processing first sensor signals to produce conditioned sensor signals, said conditioned sensor signals being received by said microcomputer.

3. The sensor unit of claim 2 wherein said conditioned sensor signals are stored in memory by said microcomputer.

4. The sensor unit of claim 2 wherein said conditioned sensor signals are wirelessly transmitted by said wireless communications port to the peripheral device.

5. The sensor unit of claim 2 wherein said conditioning circuit includes a switch for selecting between a plurality of signal analysis circuits, at least one of said plurality of signal analysis circuits including an integrator for integrating said first sensor signals.

6. The sensor unit of claim 5 wherein said plurality of signal analysis circuits further includes a peak detect and hold circuit.

7. The sensor unit of claim 1, further comprising an indicator in electrical communication with said microcomputer for indicating to the operator when data acquisition is complete.

8. The sensor unit of claim 1, further comprising a display in electrical communication with said microcomputer for displaying the status of data acquisition.

9. The sensor unit of claim 1 wherein said wireless communications interface includes a serial infrared data port.

10. The sensor unit of claim 1 wherein said peripheral device includes a hand-held personal computer or dynamic signal analyzer for transmitting wireless signals to said wireless communications port and for receiving wireless signals transmitted by said wireless communications port.

11. The sensor unit of claim 1 wherein said peripheral device includes headphones for being worn by an operator, said headphones including a receiver for receiving wireless signals transmitted by said wireless communications port and converting the wireless signals to audible signals for being perceived by the operator.

12. The sensor unit of claim 1 wherein said wireless communications port is further operable to receive processed sensor signals from said microcomputer and convert said processed sensor signals to wireless signals which are output by the wireless communications port.

13. The sensor unit of claim 12 wherein said peripheral device includes a hand-held personal computer or dynamic signal analyzer.

14. The sensor unit of claim 12 wherein said peripheral device includes headphones for being worn by the operator.

15. The sensor unit of claim 1, further comprising a second sensor disposed in said housing for being placed in sensory contact at a measurement location to sense a second operating characteristic of the machine that is different than the first operating characteristic.

16. The sensor unit of claim 15 wherein said second sensor includes a bar code reader.

17. A multiple sensor data collection system for use by an operator in monitoring and collecting data from a machine, the system comprising:

a base instrument dimensioned and configured for being hand-held by an operator during data acquisition and for receiving and storing data, the base instrument including a data collection route stored therein and a base wireless communication port for transmitting and receiving wireless signals;

a plurality of sensor units for sensing a plurality of machine parameters and for producing data corresponding to the sensed machine parameters, each sensor unit including a wireless communications port for receiving route-based data collection instructions from the base instrument and transmitting signals corresponding to the data produced by the sensor units according to route-based data collection instructions, each sensor unit being dimensioned and configured for being hand-held during data acquisition, said plurality of sensor units including;

(1) a first sensor unit having a sensor for sensing a first machine parameter according to route-based data collection instructions received from the base instrument and producing first sensor signals, a converter for producing first electrical signals corresponding to the first sensor signals, a microprocessor for receiving and analyzing the first electrical signals and producing analyzed electrical data corresponding to the first machine parameter, and a first wireless communications port for producing and transmitting first wireless signals corresponding to the analyzed electrical data; and

(2) a second sensor unit having a sensor for sensing a second machine parameter different from the first machine parameter according to route-based data collection instructions received from the base instrument and producing second sensor signals, and a second wireless communications port for transmitting second wireless signals corresponding to the second sensor signals;

wherein said base instrument is operable to receive at least one of the first and second wireless signals through the base wireless communications port and to produce and store machine data corresponding to at least one of the first and second sensed parameters of the machine.

18. The system of claim 17 wherein said base instrument is operable to receive both the first and second wireless signals, and to produce and store first and second machine data corresponding to the first and second machine parameters, respectively.

19. The system of claim 17 wherein said base instrument is operable to receive and log information which is input by the operator.

20. The system of claim 17 wherein said first sensor unit is operable to receive the second wireless signals through the first wireless communications port, the converter is operable to convert the second wireless signals into second electrical signals, and wherein the microprocessor is operable to analyze the first electrical signals based on the second electrical signals to produce the analyzed electrical data.

21. The system of claim 20 wherein the second machine parameter corresponds to movement of the machine and wherein the microprocessor is operable to analyze the first electrical signals as a function of the movement of the machine.

22. The system of claim 21 wherein the second sensor unit further comprises a tachometer and the second sensor signals correspond to the speed of a rotating element of the machine.

23. The system of claim 17 wherein said base instrument is further operable to instruct a sensor unit through route-based data collection instructions to sense one machine parameter and to transmit wireless signals corresponding to said one machine parameter each time route-based data collection instructions are transmitted to the sensor unit.

24. The system of claim 17 wherein said base instrument is further operable to instruct a sensor unit through route-based data collection instructions to sense and store a plurality of machine parameters and to transmit wireless signals corresponding to said plurality of machine parameters each time route-based data collection instructions are transmitted to the sensor unit.

25. A multiple sensor data collection system for use by an operator in monitoring a machine, the system comprising:

a microprocessor-based instrument having a data collection route stored therein and including a base wireless communications port;

a first hand-held sensor unit dimensioned and configured for being hand-held during data acquisition, said first hand-held sensor unit including;

a first microprocessor secured therein,

a first wireless communications port mounted on the first hand-held sensor unit and in electrical communication with the first microprocessor, the microprocessor-based instrument being operable to transmit route-based data collection instructions to the first microprocessor via the base wireless communications port and the first wireless communications port; and

a first sensor mounted on the first hand-held sensor unit and in electrical communication with the first microprocessor for sensing a machine operating characteristic according to route-based data collection instructions and producing first sensor signals corresponding to the machine operating characteristic that is sensed, the first hand-held sensor unit being further operable to transmit a first set of data signals corresponding to the first sensor signals via the first wireless communications port; and

a second hand-held sensor unit dimensioned and configured for being hand-held during data acquisition, said second hand-held sensor unit including;

a second microprocessor secured therein;

a second wireless communications port mounted on the second hand-held sensor unit and in electrical communication with the second microprocessor of the second hand-held sensor unit, the microprocessor-based instrument being operable to transmit route-based data collection instructions to the second microprocessor of the second hand-held sensor unit via the base wireless communications port and the second communications port of the second hand-held sensor unit; and

a second sensor mounted on the second hand-held sensor unit and in electrical communication with the second microprocessor of the second hand-held sensor unit for sensing a machine operating characteristic according to route-based data collection instructions and producing second sensor signals corresponding to the machine operating characteristic that is sensed, the second hand-held sensor unit being further operable to transmit a second set of data signals corresponding to the second sensor signals via the second wireless communications port.

26. The system of claim 25 wherein said first hand-held sensor unit further comprises means for demodulating the first sensor signals to produce first demodulated sensor signals.

27. The system of claim 25 wherein said first sensor includes a tachometer for sensing the speed of a rotating element of the machine and for producing tachometer signals which are wirelessly transmitted by the first wireless communications port.

28. The system of claim 25 wherein said second wireless communications port is further operable to receive tachometer signals transmitted by the first wireless communications port, said tachometer signals being received by the second microprocessor and synchronously averaged with said second sensor signals to produce synchronously averaged data.

29. The system of claim 25 wherein at least one of the first and second hand-held sensor units computes Fourier Transforms based on at least one of the first and second sets of data signals.

30. The system of claim 25 further including wireless headphones worn by the operator for producing audible signals corresponding to signals produced by the first and second wireless communications ports.

31. The system of claim 30 wherein the first sensor is an ultrasonic sensor and the headphones produce audible signals corresponding to sensor signals produced by the ultrasonic sensor.

32. The system of claim 25 wherein said microprocessor-based instrument is further operable to instruct a sensor unit through route-based data collection instructions to sense one machine operating characteristic and to transmit wireless signals corresponding to said one machine operating characteristic each time route-based data collection instructions are transmitted to the sensor unit.

33. The system of claim 25 wherein said microprocessor-based instrument is further operable to instruct a sensor unit through route-based data collection instructions to sense and store a plurality of machine operating characteristics and to transmit wireless signals corresponding to said plurality of machine operating characteristics each time route-based data collection instructions are transmitted to the sensor unit.

34. A multiple sensor data collection system for use by an operator in monitoring a machine, the system comprising:

a microprocessor-based instrument having a data collection route stored therein and including a wireless instrument communications port; and

a hand-held sensor unit being dimensioned and configured for being hand-held during data acquisition, said hand-held sensor unit including;

a microcomputer;

a power source disposed in the sensor unit for powering the sensor unit;

an LED in electrical communication with the microprocessor for notifying the operator when receipt of the data signals is complete;

a display in electrical communication with the microcomputer for displaying data collection instructions and information to the operator;

a data acquisition switch in electrical communication with the microcomputer for initiating data collection;

a wireless communications port in electrical communication with the microcomputer, the microprocessor-based instrument being operable to transmit route-based data collection instructions to the microcomputer via the wireless instrument communications port and the sensor unit wireless communications port; and

a sensor disposed in the sensor unit for sensing an operating characteristic of the machine and producing sensor signals corresponding the machine operating characteristic that is sensed, said sensor being in electrical communication with the microcomputer for sending sensor signals to the microcomputer.

35. The system of claim 34 wherein said hand-held sensor unit is further operable to demodulate wireless signals received from the microprocessor-based instrument.

36. The system of claim 34 wherein said microcomputer performs time synchronous averaging of sensor data corresponding to the sensed signals from the sensor.

37. The system of claim 36, further comprising a movement sensor for sensing the speed of a rotating element of the machine and producing movement sensor signals corresponding thereto.

38. The system of claim 34 wherein said microcomputer is further operable to compute a fast Fourier transform of sensor signals for fault detection.

39. The system of claim 34, further comprising a set of wireless headphones for being worn by an operator, said headphones including a receiver for receiving wireless signals transmitted by said wireless communications port and converting the wireless signals to audible signals for being perceived by the operator.

40. The system of claim 34 wherein said microprocessor-based instrument is further operable to instruct the first hand-held sensor unit through route-based data collection instructions to sense one machine operating characteristic and to transmit wireless signals corresponding to said one machine operating characteristic each time route-based data collection instructions are transmitted to the first hand-held sensor unit.

41. The system of claim 34 wherein said microprocessor-based instrument is further operable to instruct the first hand-held sensor unit through route-based data collection instructions to sense and store a plurality of machine operating characteristics and to transmit wireless signals corresponding to said plurality of machine operating characteristics each time route-based data collection instructions are transmitted to the first hand-held sensor unit.

42. A method for collecting machine operating data comprising the steps of:

providing a plurality of hand-held sensor units, each of said plurality of hand-held sensor units being dimensioned and configured to be hand-held during data acquisition and having a microcomputer, a sensor in electrical communication with the microcomputer, and a wireless communications port for wirelessly communicating with a peripheral device;

providing a base instrument dimensioned and configured to be hand-held and having a base wireless communications port for wirelessly communicating with one or more of said plurality of sensor units, said base instrument having a data collection route stored therein;

wirelessly transmitting route-based data collection instructions from the base instrument to at least one of the hand-held sensor units;

taking a data measurement by placing said at least one of the hand-held sensor units in sensory contact with a machine in accordance with route-based data collection instructions so that said sensor unit senses an operating characteristic of the machine and produces a corresponding sensor signal which is received and processed by the microcomputer to produce machine data; and

wirelessly transmitting machine data from said at least one of the hand-held sensor units to the base instrument.

43. The method of claim 42, further comprising the step of storing machine date in a sensor unit before transmitting the stored sensor data to the base instrument.

44. The method of claim 42, further comprising the step of storing transmitted machine data in the base instrument.

45. The method of claim 42, further comprising the step of computing a fast Fourier transform of sensor data in a sensor unit to produce machine data which is wirelessly transmitted to the base instrument.

46. The method of claim 42, further comprising the step of transmitting machine data to the base instrument after each data measurement is taken.