JP3714891B2 - Apparatus and method for simultaneous recording of sensor signal and GPS time - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention uses a GPS (Global Positioning System) receiver to automatically generate current time information accurately synchronized with absolute time, and to simultaneously record the sensor signal and GPS time. And a simultaneous recording apparatus and method.
[0002]
[Prior art]
Traditionally, seismometers have been installed in various parts of the country to measure the magnitude of seismic wave shaking, but the main goal was to measure the intensity of shaking at the location where they were installed. The accuracy of the device (timer) was not a problem.
In addition, when constructing and managing long-span bridges and skyscrapers, the actual vibration characteristics are fully simulated after construction even if strength calculations are repeatedly performed by simulation processing on the computer at the design stage before construction. It has not been actually measured.
[0003]
[Problems to be solved by the invention]
However, when the measurement accuracy of the seismometer is improved and weak seismic waves such as nuclear tests conducted overseas can be detected, comparative research with overseas measurement data is conducted, and a wide range of crustal structure inside the earth is studied. In order to analyze it, it has become necessary to study the measurement data of seismometers scattered all over the country in comparison with each other. On the other hand, atomic clocks and the like are very expensive and difficult to maintain, and it is very difficult to improve time accuracy within 10 msec by time correction using time signal radio waves from broadcasting stations. there were.
In addition, after the completion of the long-span bridge, if it is going to measure the dynamic characteristics of the vibration of the bridge as a train passes, vibration sensors must be installed at several tens of locations at a predetermined interval such as 500 m. The output is very weak, and there is a problem that it is impossible to transmit several hundreds of meters to several kilometers with a cable.
Furthermore, in high-rise buildings and the like, the vibrations due to strong winds and earthquakes differ greatly between the lower floors and the higher floors. When measuring the vibration of the entire building and calculating the resonance characteristics specific to the building structure, several Collecting vibration data by connecting locations and sensors with cables and collecting vibration data is a very cumbersome work after the building is completed, and improvement of such work and measurement method was strongly desired .
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a GPS receiver with a structure that can be carried in a small size, and to operate in a low power consumption mode so that a necessary time zone can be obtained. Providing a time output device and a time recording device for outputting the current time information synchronized with the absolute time with the minimum power consumption to the outside, and thus, when recording sensor data, the power cable and the signal cable which have been conventionally required Provided is an apparatus and method for simultaneously recording a sensor signal and GPS time, which eliminates the need for laying work, can realize simultaneous measurement of signals flexibly at a wide range of recording points, and facilitates dynamic analysis of vibration characteristics of high-rise buildings and the like. There is.
[0004]
[Means for Solving the Problems]
The present invention relates to a device for simultaneously recording a sensor signal and GPS time for acquiring and recording a sensor signal from at least one sensor.
The recording device comprises a) a GPS time output device, b) storage means, c) recording parameter input means, and d) a recorder for recording the sensor signal and GPS time,
The GPS time output device generates, manages, and outputs a time signal synchronized with the GPS time, and selects a set of a GPS time generation device, a storage unit, and the time output device operating parameter to a predetermined time. Processing means for generating and outputting the signal to the outside,
The GPS time generator is obtained by a GPS receiver that extracts clock data synchronized with time data and absolute time from a GPS received signal, an oscillator that generates a pulse signal at a frequency with a predetermined accuracy, and the GPS receiver. The storage means for storing the latest time data as the current time, the counter for counting the pulse signal obtained by the oscillator, the count value of the counter divided by the frequency of the oscillator, and the result stored in the storage means Calculation means for adding the current time to obtain the time after reset, and confirming that the clock pulse obtained by the GPS receiver, which is coupled to the calculation means and the GPS receiver, is within a predetermined period Counter reset means for resetting the counter,
The GPS time correction is performed according to the frequency accuracy of the oscillator so that the measurement time of the GPS time generator is synchronized with the absolute time of the GPS receiver and the accuracy of the counter is within a predetermined accuracy range. In response to the selected parameter of the time output device operating parameter, a predetermined digital time signal is output to the outside in synchronization with the GPS absolute time,
This is achieved by simultaneously recording the sensor signal and the digital time signal output to the outside on the recorder in response to the absolute time in accordance with the recording parameter.
The present invention also relates to an autonomous time output device for generating, managing, and outputting a time signal. The object of the present invention is a GPS time generating device, a first solid-state memory, and the autonomous time output device. Input means for electronically downloading to the first solid-state memory a plurality of operating programs provided in the device and providing a menu of time output device operating parameters; time from the menu of the time generating device operating parameters; This is achieved by comprising a processing means for selecting a set of output device operating parameters to generate and output a predetermined time signal to the outside.
The invention also relates to an autonomous time recording device (ATR) for acquiring, processing and storing together with time data a sensor signal from at least one sensor. A device, a first solid-state memory, and an input means provided in the ATR for electronically downloading to the first solid-state memory of the ATR a plurality of operating programs providing a menu of recording device operating parameters The sensor is obtained by selecting a set of recording device operating parameters from the menu of recording device operating parameters provided by the operating program in response to the absolute time of the time generating device provided in the ATR And a processing means for obtaining and processing the acquired sensor data from said processing means. Also achieved by providing a second solid state memory for storing together with the time data of data.
Furthermore, the present invention relates to a time output method, and the above object of the present invention is to provide a GPS time generation step, a time output device provided with a resident operating program while inputting the GPS time and managing the time accuracy. It is also achieved by providing a step of outputting absolute time data to the outside for a predetermined period in accordance with a set of time output device operating parameters from a menu of operating parameters.
Furthermore, the present invention relates to a time recording method for acquiring, processing, storing and integrating the sensor signal by a time recording device. Inputting a time to manage time accuracy and selecting and waiting for a set of recorder operating parameters from a menu of recorder operating parameters provided by a resident operating program; and the selected set of records Obtaining and processing a sensor signal generated by at least one sensor electronically coupled to the time recording device according to the device operating parameters together with a spatial position and an absolute time; and a sensor signal recorded in the time recording device. It is also achieved by providing an external transfer / transmission step.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows an example of a hardware configuration of a time output device and / or a time recording device according to the present invention. In the GPS time generation unit 10, first, a GPS signal received by a GPS antenna 12 is sent to a GPS receiver 16. Sent. The GPS receiver 16 can detect the positioning data PD from the received GPS signal and output it to the control unit 2, and can extract only the time data TD based on the absolute time included in the positioning data. A clock pulse synchronized with the absolute time (hereinafter referred to as CP pulse) is reproduced and output to the control unit 2 and the like. These positioning data PD, time data TD, and CP pulse are sent to the time management unit 40 in the control unit 2 and also to the OS unit 60 constituted by a microprocessor (hereinafter referred to as MPU).
The GPS time generation unit 10 is also provided with a temperature-compensated crystal oscillator 20, a counter 22, and a gate circuit 24. The counter 22 is reset at a predetermined timing synchronized with the CP pulse by the counter reset means 18 constituted by an AND circuit. It is supposed to be reset. The accuracy of the CP pulse and the oscillator 20 is usually preferably 1 ppm or more.
On the other hand, the counter 22 operates as a counter that counts the output signal of the oscillator 20 and can also operate as a timer according to the setting conditions from the control unit 2. It is preferable that the external trigger signal of 2, 5, 10, 20, 50, 100, 200, 500, 1000 milliseconds can be appropriately selected and output. The time counter 22 counts a clock having a frequency set based on the output signal of the oscillator 20 and outputs the clock to the control unit 2 in parallel.
Further, the gate circuit 24 coupled to the counter 22 can output a pulse signal of various timings in synchronization with the CP pulse in response to a command of the synchronization control unit 50 in the control unit 2, and at a predetermined timing. In addition to generating a trigger signal TRIG to an external device and a synchronization signal TSYNC of a time output signal, a sampling clock of an A / D conversion means 45 for inputting an external sensor output is also generated. Thus, the GPS receiver 16 and the oscillator 20 are coupled with power supply switching means 14a and 14b, respectively, and the supply power is turned on at a predetermined timing by the control signals PG1 and PG2 output from the OS (operating system) unit 60, respectively. -OFF control is performed.
Further, a rough time signal with an accuracy of about 5 ppm is input to the control unit 2 from a real-time clock (RTC) 32 that is always backed up by the battery 30, and the RTC 32 executes a time measurement process in a sleep state or a standby state. Yes. Thus, the time information of each accuracy input to the control unit 2 is synchronized by the time management unit 40 and stored and managed based on the absolute time, and the edge rising and falling changes of the external digital signals DI1 to DIN change the state. When detected by the detection unit 44, these state change times are read from the time management unit 40 by the time data input unit 42 and stored in the second storage means 46. Furthermore, the external sensor signals AI1 to AIX are digitized at a predetermined timing via the A / D conversion means 45 and stored in the second storage means 46 together with the absolute time data.
On the other hand, when outputting the absolute time data to the outside, the OS unit 60 outputs a time data read command to the time data input unit 42, and the absolute time read from the time management unit 40 is converted by the serial data conversion unit 48. The data is converted into serial data, and a start bit and a stop bit are added before and after the data, and the data is output to the outside through the DO unit 52 as a signal TCODE. The synchronization signal TSYNC of the signal TCODE is also output to the outside via the synchronization control unit 50 and the gate circuit 24 at a timing synchronized with the CP pulse.
Furthermore, the control unit 2 is provided with first storage means 70 composed of a flash memory or the like for storing execution programs and data, and management information 70a and rewritable execution program groups 72a to 72n. The fixed program 72M and the like can be stored. The power of the storage means 70 is applied based on the control signal PG3 only at the read and write timings by the power supply switching means 14c, and the parallel IF (interface) section 82 or the serial IF section 84 in the communication control section 80 is connected. Write data is transferred from an external host computer (not shown). Thus, immediately after the power is turned on, the execution program written in the first storage means 70 is read from the storage means 70 to the RAMs 62a and 62b and executed, and the control unit 2 displays display means such as a liquid crystal panel and a plasma panel. 34 and a data input means 36 composed of an operation key switch, a numeric keypad and the like are also coupled so that a normal man-machine interface operation can be executed while viewing the message on the display means 34. Since the power consumption of the display means 34 is large, the power supply can be controlled to be turned on and off by the power supply switching means 14d based on the control signal PG4.
[0006]
In such a configuration, the operation of the time output devices 100a and 100b of the present invention will be described with reference to FIGS.
In FIG. 2, the time output devices 100a and 100b of the present invention linked to the GPS satellite 1 are juxtaposed to the existing seismometers 110a and 110b, and the time output devices 100a and 100b are connected to subchannels such as the recorders 112a and 112b. The time code TCODE and / or the synchronization signal TSYNC output from the signal are simultaneously input and recorded together with the sensor signal on the recording paper 114a, 114b and the like.
First, in the GPS system, the CP pulse generated by the GPS receiver 16 is reproduced in synchronization with the absolute time, and is usually reproduced and output at intervals of one second. The time data TD is also updated every second in a normal state. However, if the GPS antenna 12 is faulty or the satellite reception state changes suddenly, it is not always possible to reliably reproduce the CP pulse at predetermined intervals every second.
Therefore, in conjunction with the GPS time generation unit 10 and the time management unit 40 of the present invention, the time data TD is updated by the following processing to obtain the current time and time correction data, and the counter 22 is synchronously reset, Perform high-precision time management with an accuracy of around 1 ppm.
First, when an activation pulse for releasing the sleep state of the control unit 2 is output from the RTC 32 at time t1 in FIG. 3A, the GPS power source and the power control signal PG1 of the oscillator 20 are transmitted by the OS unit 60 and the like in the control unit 2. And PG2 are turned on and supplied via the power supply switching means 14a and 14b. Then, since the CP pulse is output from the GPS receiver 16 at a predetermined interval, the time management unit 40 checks the interval of the CP pulse by comparing it with the output of the counter 22 linked to the oscillator 20.
Thus, if it can be confirmed that a CP pulse is output at a predetermined interval (for example, every 1 second), the reception time of the next CP pulse can be predicted in advance. Therefore, the counter is counted only for a predetermined period before and after that (for example, 10 μsec). The reset control signal XG of No. 22 is activated, and the counter 22 is reset when a CP pulse arrives within this reset period. When the reset of the counter 22 can be confirmed, the absolute time during measurement is updated based on the previously received TD data, and the time correction data (TD data) of the counter 22 is written in the storage means 46 and the like. On the other hand, if the CP pulse does not reach during the reset period of the control signal XG, the above process is repeated again from the CP pulse interval check, and the reset process is repeated until the counter 22 can be reset.
Thus, for example, when the resetting of the counter 22 ends at the time t3, the power of the GPS receiver 16 is turned off, and the sleep period until the time t5 immediately before the time output start time t10 is set in the gate circuit 24. Until time t5, an MPU (microprocessor) (not shown) which is the maximum power consumption source of the control unit 2 is also in the sleep state. However, the time management unit 40 and the RAM 62 are supplied with power in this sleep state, and are maintained in a state where they can operate immediately when the MPU is activated. By executing such power saving control in detail, the life of the battery 30 can be greatly extended.
Next, when an MPU activation interrupt is generated from the gate circuit 24 at time t5 in FIG. 3D, the MPU rises again, and usually at a predetermined timing (for example, 100 msec before) immediately before the time output start time t10. When the current absolute time is read from the time management unit 40 and 10-digit digit information and 1-minute digit information are extracted from this time information, the time data input unit 42 performs +1 processing and normality at time t10 Information is generated and converted to 10-digit serial data and 1-minute serial data by the serial data converter 48, and a start bit and a stop bit are added at the beginning and end. Store in the digital output unit 52.
Thus, when the output preparation of the signal TCODE is completed, the time output start time t10 is written in the synchronization control unit 50, and the synchronization signal TSYNC and the signal TCODE synchronized with the CP pulse are output to the recorder 112a or 112b at a predetermined timing. It is like that. This is shown in FIGS. 3E to 3H. FIGS. 3G and 3H are enlarged views of the time axis of FIGS. 3E and 3F. In FIG. 3G, a signal TCODE is output at the timing of 00 seconds for each minute data. The sync signal TSYNC is inverted and output in units of 500 msec. In the above description, the time signal TCODE outputs only minute information, but it is easy for those skilled in the art to add year, month, day, and time information and output.
Further, when 15 minutes to several hours have elapsed, the clock of the oscillator 20 is shifted from the absolute time and the error becomes large. For example, the GPS receiver 16 is started up every 15 minutes and the counter 22 is reset. It may be repeated in the same manner as described above. In the above description, the paper output recorder is described as the recorder. However, if the sensor and the time signal TCODE can be recorded, such as a magnetic tape such as a data recorder or a large capacity computer memory, the type of the recording medium is Anything is ok.
[0007]
FIG. 4 shown corresponding to FIG. 2 shows another embodiment of the present invention, in which vibration sensors 210a to 210k are distributed and installed on the long bridge 200 at predetermined distance intervals. The time recording devices 100a to 100k are also arranged in parallel with the vibration sensors, respectively, and the vibration characteristics of the long bridge 200 are measured by running the train 202 at a predetermined time.
In the vibration measurement system of FIG. 4, first, the time recording devices 100a to 100k of the present invention are recorded in advance by a personal computer (not shown) on the vibration measurement start time, end time, sampling rate, and power-on / off time of the vibration meter sensor. Write as The recording parameters may be set by manual operation using the display means 34 and the input means 36.
Thus, when the setting of the recording parameters is completed, the vibration sensors 210a to 210k and the time recording devices 100a to 100k are dispersedly arranged at predetermined distance intervals, and wait until the passing time of the train 202.
5A, when the activation pulse for releasing the sleep state of the control unit 2 is output from the RTC 32 in the time recording devices 100a to 100k, the OS unit 60 starts up, and the GPS power source and the oscillator Twenty power supplies are supplied based on the control signals PG1 and PG2. Then, CP pulses are output from the GPS receiver 16 at predetermined time intervals, and the current position data PD of the time recording devices 100a to 100k is also output. Therefore, the current position data PD is input and written in the storage means 46. Include.
Next, if it can be confirmed that the CP pulse is output at a predetermined time interval, the reception time of the next CP pulse can be predicted in advance. Therefore, the reset control of the counter 22 is performed only for a predetermined period before and after that (for example, 10 μsec). When the signal XG is activated and a CP pulse arrives within this reset period, the counter 22 is reset and the absolute time during measurement is updated as shown in the following equation based on the previously received TD data. .
[Expression 1]
Reset current time (seconds) = GPS reception time data (seconds) +1.0
[Expression 2]
Time after reset = Current time (seconds) reset in Equation 1 + Counter value of counter 22 (N) / Counter frequency (Hz)
The counter frequency is the oscillation frequency of the oscillator 20, and if the oscillation frequency is 1 MHz, the time resolution is 1 μsec. Thus, when the current position measurement and time correction processing are completed at time t3 in FIG. 5C, the power of the GPS receiver 16 is turned off, and time t4 to t5 before the recording start time t10 in FIG. The sleep period is set in the gate circuit 24, and during this period, all the MPUs of the time recording devices 100a to 100k are also in the sleep state. Next, at time t5 immediately before the train 202 reaches the bridge 200, each gate circuit 24 generates an activation interrupt for each MPU independently to supply power to the vibration sensors 210a to 210k and perform AD conversion. Prepare for input. (Time points t6 and t7 in FIG. 5). Subsequently, from time t10 in FIG. 5F when the train 202 enters the bridge 200, the time recording devices 100a to 100k start AD conversion of the outputs of the vibration sensors 210a to 210k, and perform predetermined sampling until the recording end time t40. The sensor output is AD-converted sequentially at intervals and written into the storage means 46.
Thus, when the measurement of the sensors 210a to 210k is completed, the power supply of the oscillator 20 is turned off, and then the power supply of the MPU is also turned off (time point t44 in FIG. 5B). Thereafter, when the vibration sensors 210a to 210k and the time recording devices 100a to 100k are collected and the sensor data is read from the storage means 46i of each time recording device 100i, vibration data in the range of several tens of kilometers can be obtained with time accuracy and position. Since it can be collected with high accuracy, dynamic characteristic analysis of a long bridge can be calculated with high accuracy. In the vibration data collection process as described above, it is not necessary to lay a power cable or a signal cable over a long distance, and the sensor power supply and the power supply of the data storage device can be controlled on and off within the minimum necessary range. It is possible to carry out agile and low-power-consumption data collection work simultaneously and accurately over a wide range of several tens of kilometers.
[0008]
FIG. 6 corresponding to FIG. 2 and FIG. 4 shows another embodiment of the present invention, in which vibration sensors 210a to 210p are attached to the high-rise building 310 at predetermined spatial intervals with the time recording devices 100a to 100p. In addition, the vibrations of the starter 300 coupled to the time output device 100x are recorded, and the vibration characteristics of the high-rise building 310 are analyzed. Such measurement is an indispensable task when anti-vibration measures and vibration suppression measures are taken for high-rise buildings, but in the past, performing such measurements in a completed building is a very troublesome task in terms of cable laying. there were. In the vibration measuring system of FIG. 6, the time recording devices 100a to 100p of the present invention are recorded in advance by a personal computer or the like (not shown) to record the vibration measurement start time, end time, sampling rate, vibration sensor power on / off time, and the like. And then installed at predetermined locations. Also, in the time output device 100x of the present invention coupled to the vibration generator 300, vibration parameters such as vibration start time, vibration interval, total number of vibrations, etc. are written in advance by a personal computer (not shown). Join.
Thus, when the setting of the time output parameter / time recording parameter is completed, the time recording devices 100a to 100p and 100x are in the active state only for the RTC 32a to RTC 32x until the vibration start time, and all other power supplies are turned off.
7A, when the activation pulse for releasing the sleep state of the control unit 2x of the time output device 100x is output from the RTC 32x at the time point t1x, the OS unit 60x starts up, and the GPS power source and the power source of the oscillator 20x are supplied. Is supplied based on the control signals PG1 and PG2. Then, the CP pulse received from the GPS receiver 16x is output and the current position data PDx of the time output device 100x is also output. The current position data PDx is input and written in the storage means 46x. If it can be confirmed that the CP pulse is output at a predetermined time interval, the next CP pulse reception time is predicted in advance, and the reset control of the counter 22x is performed only for a predetermined period before and after that (for example, 5 μsec). The signal XGx is set in an active state, the counter 22x is reset at the predicted falling edge of the CP pulse, and time correction processing is executed. Thus, at the time t3x in FIG. 7C, when the current position measurement and time correction processing are completed, the power of the GPS receiver 16x is turned off, and the MPU of the time output device 100x until the time t5x immediately before the activation start time t10x. Goes to sleep.
On the other hand, at time points t1a to t1p in FIG. 7F, activation pulses for canceling the sleep states of the control units 2a to 2p are output from the RTCs 32a to RTC 32p, respectively, within the time recording devices 100a to 100p that are distributed. Then, the OS units 60a to 60p are started, the GPS power source and the power source of the oscillator 20 are respectively supplied, and the input of the current position data PDa to PDp of each time recording device and the time correction processing are performed in parallel with the time output device 100x. After that, the powers of the GPS receivers 16a to 16p are turned off, and each MPU enters a sleep state until a time point t5a to t5p immediately before the recording start time t10a to t10p.
Next, at times t5a to t5p immediately before the start of recording, MPU activation interrupts are generated from the gate circuits 24a to 24p, respectively, and power is supplied to the vibration sensors 210a to 210p and preparation for AD conversion input is performed ( (Time t6a, t7a, etc. in FIGS. 7G and 7J). Also in the time output device 100x, the MPU activation interrupt is generated from the gate circuit 24x at time t5x, and the trigger output to the exciter 300 is awaited. Thus, at time t10x in FIG. 7E, the trigger pulse is output from the time output device 100x to the exciter 300, the hammer 302 and the like are dropped on the ground, and the vibration propagates to the high-rise building 310. On the other hand, in the time recording devices 100a to 100p distributed in the high-rise building 310, the vibration sensors 210a to 210p are sequentially arranged at the designated sampling time intervals from the time t10a to t10p to the time t15a to t15p in FIG. The output is AD-converted and written in the storage means 46a to 46p.
Similarly, at time t20x,..., T30x in FIG. 7E, a vibration command is sequentially output from the time output device 100x, and the vibration is detected by vibration sensors 210a to 210p distributed in the high-rise building 310. And stored in the time recording devices 100a to 100p, respectively. Thus, when the measurement of the vibration sensors 210a to 210p is completed, the power sources of the oscillators 20a to 20p are turned off (time point t50a in FIG. 7 (I)), and then the power source of the MPU is also turned off (FIG. 7G). At time t52a). Thereafter, by collecting the time recording devices 100a to 100p and reading the sensor data from the storage means 46i of each time recording device 100i, it is possible to read data with good time accuracy / space accuracy. It is possible to analyze with high accuracy.
In the vibration data collection process as described above, it is not necessary to lay a power cable or a signal cable over a long distance, and the sensor power supply and the power supply of the data recording device are controlled to the minimum necessary range. It is possible to realize a flexible and low power consumption data collection operation.
[0009]
Next, the program environment of the time output device / time recording device 100 will be described with reference to FIGS. The time output device 100 and a personal computer (not shown) perform data communication via a parallel IF unit 82 or a serial IF unit 84 provided in the communication control unit 80 of FIG. 1, and an OS unit configured by a ROM or the like. Under the control of 60, the downloadable program is written in the areas 72a to 72n of the storage means 70.
By the way, the memory management method in the case where the storage means 70 is constituted by a flash memory will be described in more detail. In the head area of each flash memory, memory failure replacement information 710 and downloaded load module information 72 are written. As the memory failure substitute information 710, substitute block information 712a to 712k when there is a chip failure is written.
The contents of the module information 72 are composed of a module name 720, module creation time information 722, a RAM start address 724 when expanded in the RAM, a start address 726 when written in the flash memory, a file size 728, and the like. (FIG. 9).
Note that the currently executed load module information, memory failure substitute information, and substitute block information are stored in a predetermined area of the RAM 62.
Further, as shown in FIG. 11, the timekeeping / recording parameter information 704 includes a GPS activation parameter 800, a time output parameter 810, a signal TSYNC presence / absence information 812, a signal TCODE presence / absence information 814, and a trigger output parameter 820 as a trigger output. Presence / absence information 822, output start time 824, ON period 826, OFF period 828, number of repetitions 830, and the like. The event input parameter 840 includes event input presence / absence information 842, event measurement start time 844, edge rise recording presence / absence information 846, edge fall recording presence / absence information 848, recording start address 850, measurement period 852, number of repetitions 854, and the like. There is. Further, the AI input parameter 860 includes the number of input channels 862, an AD conversion gain 864, a sampling interval 866, a recording start time 868, a recording start address 870, a recording period 872, a repetition count 874, and the like. Further, the communication parameter 880 of measurement data includes a communication unit 882, a communication speed 884, a communication start time 886, a communication start address 888, a communication data length 890, a repetition count 892, and the like.
Based on such a data structure, the operation will be described with reference to the flowchart of FIG. 10. First, after the power is turned on, the read memory information 700 and the execution module information 702 of the flash memory are checked. In step S2), the execution modules are sequentially read out from the designated flash memory onto the RAM, and are developed and written into an execution format (step S4). Thereafter, an interrupt vector is set, a software trap is used to jump to the start address (step S6), and a predetermined module is executed (step S8).
On the other hand, if the execution module is not registered, the host waits for a command, and if a program deletion command is output (step S10), the specified area of the specified flash memory is deleted (step S12). When a program registration command is output from the host (step S14), the program is written in the designated area of the designated flash memory (step S16). Further, when the self-diagnosis command is output (step S18), the self-diagnosis is executed and the result is output to the host (step S20). Furthermore, in the case of a parameter communication setting command (step S22), a communication setting process for time / record parameter information 704 is performed (step S24). When the program execution command is output (step S26), the process jumps to step S2.
In the above description, the time output devices 100a and 100b and the time recording devices 100a to 100p are distinguished from each other. However, as shown in FIG. 1, the time output devices 100a and 100b of the present invention are time recording devices 100a to 100a. It will be apparent to those skilled in the art that 100p can be used. It will be apparent to those skilled in the art that the time recording devices 100a to 100p can also serve as the time output devices 100a and 100b of the present invention as shown in FIG.
[0010]
【The invention's effect】
As described above, according to the simultaneous recording device for acquiring the sensor signal from the sensor using the time output device / time recording device of the present invention and recording it, the simultaneous recording device of the GPS signal and the GPS time, the necessary minimum The absolute time synchronized with the GPS satellites can be output to the outside with the power consumption. Also, when recording sensor data, the installation work of the power cable and signal cable, which was necessary in the past, is no longer necessary, and it can be used at a wide range of recording points. Simultaneous measurement of signals can be realized flexibly, and dynamic characteristics analysis of vibrations in high-rise buildings and the like becomes easy.
[Brief description of the drawings]
FIG. 1 is a hardware block diagram showing an embodiment of a time output / recording apparatus according to the present invention.
FIG. 2 is a system configuration example showing application of the time output device of the present invention.
FIG. 3 is a time chart for explaining the operation;
FIG. 4 is an example showing an application of the time recording apparatus of the present invention to a long bridge.
FIG. 5 is a time chart for explaining the operation;
FIG. 6 is an example showing the application of the time recording apparatus of the present invention to a high-rise building.
FIG. 7 is a time chart for inventing the operation.
FIG. 8 is a diagram showing an example of a data structure of flash management information according to the present invention.
FIG. 9 is a diagram showing an example of a data structure of module information according to the present invention.
FIG. 10 is an example of a flowchart for explaining the host interface operation of the present invention.
FIG. 11 is a diagram showing an example of a data structure of timekeeping / recording parameter information according to the present invention.
[Explanation of symbols]
12 GPS antennas 14a to 14d Power source switching means 16 GPS receiver 18 Gate means 20, 32 Oscillator 22 Counter 24 Gate circuit 30 Battery 34 Display means 36 Input means 40 Time management section 42 Time data input section 44 State change detection section 45 AD conversion Means 46, 70 Storage means 48 Serial data conversion unit 50 Synchronization control unit 52 Digital output unit 60 OS unit 62 RAM
80 Communication control unit 82 Parallel IF unit 84 Serial IF unit 100, 100a to 100x Time output / recording device 200 Nagaohashi 210a to 210p Vibration sensor 310 High-rise building

Claims (34)

A device for simultaneously recording a sensor signal and GPS time for acquiring and recording a sensor signal from at least one sensor,
The recording device comprises a) a GPS time output device, b) storage means, c) recording parameter input means, and d) a recorder for recording the sensor signal and GPS time,
The GPS time output device generates, manages, and outputs a time signal synchronized with the GPS time, and selects a set of a GPS time generation device, a storage unit, and the time output device operating parameter to a predetermined time. Processing means for generating and outputting the signal to the outside,
The GPS time generator is obtained by a GPS receiver that extracts clock data synchronized with time data and absolute time from a GPS received signal, an oscillator that generates a pulse signal at a frequency with a predetermined accuracy, and the GPS receiver. The storage means for storing the latest time data as the current time, the counter for counting the pulse signal obtained by the oscillator, the count value of the counter divided by the frequency of the oscillator, and the result stored in the storage means Calculation means for adding the current time to obtain the time after reset, and confirming that the clock pulse obtained by the GPS receiver, which is coupled to the calculation means and the GPS receiver, is within a predetermined period Counter reset means for resetting the counter,
The GPS time correction is performed according to the frequency accuracy of the oscillator so that the measurement time of the GPS time generator is synchronized with the absolute time of the GPS receiver and the accuracy of the counter is within a predetermined accuracy range. In response to the selected parameter of the time output device operating parameter, a predetermined digital time signal is output to the outside in synchronization with the GPS absolute time,
The sensor signal and the GPS are simultaneously recorded in the recorder according to the recording parameter in response to the absolute time in response to the sensor signal and the digital time signal output to the outside. Simultaneous recording device with time. The sensor signal and GPS time according to claim 1, wherein the recorder includes a paper output recorder, a data recorder, or a computer, and the recording medium includes paper, magnetic tape, or a computer memory. Simultaneous recording device. The simultaneous recording apparatus for sensor signals and GPS time according to claim 1 or 2, wherein the storage means also serves as the recorder. The simultaneous recording apparatus of the sensor signal and GPS time of any one of Claim 1 thru | or 3 which recorded the said sensor signal by A / D converting. 5. The sensor signal and GPS according to claim 1, wherein the recording parameter includes at least one of a GPS activation parameter, a time output parameter, a trigger output parameter, an event input parameter, or a measurement data communication parameter. Simultaneous recording device with time. The time output parameter includes the presence / absence information of the signal TSYNC or the presence / absence information of the signal TCODE,
The trigger output parameters include trigger output presence / absence information, output start time, ON period, OFF period, or repetition count,
6. The sensor according to claim 5, wherein the event input parameter includes event input presence / absence information, event measurement start time, edge rising recording presence / absence information, edge falling recording presence / absence information, recording start address, measurement period, or number of repetitions. Simultaneous recording device for signal and GPS time. The recording parameters include AI input parameters;
The sensor signal according to any one of claims 1 to 6, wherein the AI input parameter includes the number of input channels, AD conversion gain, sampling interval, recording start time, recording start address, recording period, or number of repetitions. Simultaneous recording device with GPS time. The simultaneous recording device of the sensor signal and the GPS time according to claim 7, wherein the sampling interval of the AI input parameter and / or the recording start time includes an absolute time synchronized with the GPS time of the time generating unit. The sensor signal and GPS according to any one of claims 5 to 8, wherein the communication parameter of the measurement data includes a communication means, a communication speed, a communication start time, a communication start address, a communication data length, or a repetition count. Simultaneous recording device with time. 10. The simultaneous recording apparatus for sensor signals and GPS time according to claim 9, wherein the communication means performs data communication with the outside via a parallel interface or a serial interface. The simultaneous recording device of the sensor signal and the GPS time according to any one of claims 1 to 10, wherein an oscillator of the time generation device has an accuracy of 1 ppm or more. The simultaneous recording apparatus of the sensor signal and GPS time of any one of Claims 1 thru | or 11 with which the said oscillator contains an oscillator with a temperature compensation. The counter of the said time generator can output the trigger signal of 1, 2, 5, 10, 20, 50, 100, 200, 500, or 1000 milliseconds to the exterior. The simultaneous recording apparatus of the described sensor signal and GPS time. The simultaneous recording apparatus of the sensor signal and GPS time of any one of Claims 1 thru | or 13 which detected the observation position data of the said recording apparatus from the said GPS receiver. The simultaneous recording apparatus of the sensor signal and GPS time of any one of Claims 1 thru | or 14 with which the said memory | storage means was comprised with flash memory or RAM memory. The simultaneous recording apparatus of the sensor signal and GPS time of any one of Claims 1 thru | or 15 in which the said sensor contains a seismometer or a vibration sensor. The simultaneous recording apparatus for sensor signals and GPS time according to any one of claims 1 to 16, wherein the recording apparatus is a portable recording apparatus. A method of simultaneously recording a sensor signal and GPS time for acquiring and recording a sensor signal from at least one sensor,
The recording device comprises a) a GPS time output device, b) storage means, c) recording parameter input means, and d) a recorder for recording the sensor signal and GPS time,
The GPS time output device generates, manages, and outputs a time signal synchronized with the GPS time, and selects a set of a GPS time generation device, a storage unit, and the time output device operating parameter to a predetermined time. Processing means for generating and outputting the signal to the outside,
The GPS time generator is obtained by a GPS receiver that extracts clock data synchronized with time data and absolute time from a GPS received signal, an oscillator that generates a pulse signal at a frequency with a predetermined accuracy, and the GPS receiver. The storage means for storing the latest time data as the current time, the counter for counting the pulse signal obtained by the oscillator, the count value of the counter divided by the frequency of the oscillator, and the result stored in the storage means Calculation means for adding the current time to obtain the time after reset, and confirming that the clock pulse obtained by the GPS receiver, which is coupled to the calculation means and the GPS receiver, is within a predetermined period Counter reset means for resetting the counter,
E) The GPS receiver step of extracting the absolute time and the synchronous clock pulse synchronized with the absolute time from the GPS received signal by the GPS receiver, and storing the absolute time;
F) a pulse measuring step of measuring a pulse signal from the oscillator with the counter;
G) A current time calculation step of synchronizing the synchronous clock pulse of the GPS reception step with the pulse signal of the pulse measurement step and correcting the current time count value obtained by the counter of the pulse measurement step with the absolute time. When,
H) selecting and waiting for a set of recording parameters from a menu of recording parameters provided by an operating program resident in the recording device;
B) In response to the selected parameter of the time output device operating parameter, a predetermined digital time signal is output to the outside in synchronization with the GPS absolute time, the at least one sensor signal and the GPS time, A digital time signal output to the outside, in response to the absolute time, according to the recording parameters, simultaneously recording on the recorder,
N) A method for simultaneously recording a sensor signal and GPS time, comprising the step of transferring the sensor signal and GPS time recorded in the storage means and the digital time signal to the outside. After confirming that the continuous synchronous clock pulse obtained in the GPS receiving step is within a predetermined period, the counter of the pulse measuring step is confirmed within the predetermined period of the GPS receiving step. 19. The method for simultaneously recording a sensor signal and GPS time according to claim 18, wherein the sensor signal is reset by a synchronous clock pulse, and the synchronous clock pulse of the GPS receiving step and the pulse signal of the pulse measuring step are synchronized. The sensor signal and GPS according to claim 18 or 19, wherein the recorder includes a paper output recorder, a data recorder, or a computer, and the recording medium includes paper, magnetic tape, or a computer memory. Simultaneous recording method with time. 21. The method of simultaneously recording a sensor signal and GPS time according to claim 18, wherein the sensor signal is recorded after A / D conversion. The sensor signal and GPS according to any one of claims 18 to 21, wherein the recording parameter includes at least one of a GPS activation parameter, a time output parameter, a trigger output parameter, an event input parameter, or a measurement data communication parameter. Simultaneous recording method with time. The time output parameter includes the presence / absence information of the signal TSYNC or the presence / absence information of the signal TCODE,
The trigger output parameters include trigger output presence / absence information, output start time, ON period, OFF period, or repetition count,
23. The sensor according to claim 22, wherein the event input parameter includes event input presence / absence information, event measurement start time, edge rising recording presence / absence information, edge falling recording presence / absence information, recording start address, measurement period, or number of repetitions. Simultaneous recording method of signal and GPS time. The recording parameters include AI input parameters;
The sensor signal according to any one of claims 18 to 23, wherein the AI input parameter includes the number of input channels, AD conversion gain, sampling interval, recording start time, recording start address, recording period, or number of repetitions. Simultaneous recording method with GPS time. The simultaneous recording method of the sensor signal and GPS time according to claim 24, wherein the sampling interval and / or recording start time of the AI input parameter includes an absolute time synchronized with the GPS time of the time generating unit. The sensor signal and the GPS according to any one of claims 22 to 25, wherein the communication parameter of the measurement data includes a communication means, a communication speed, a communication start time, a communication start address, a communication data length, or a repetition count. Simultaneous recording method with time. 27. The method for simultaneously recording a sensor signal and GPS time according to claim 26, wherein the communication means performs data communication with the outside via a parallel interface or a serial interface. The method for simultaneously recording a sensor signal and GPS time according to any one of claims 18 to 27, wherein an oscillator of the time generator has an accuracy of 1 ppm or more. The method for simultaneously recording a sensor signal and GPS time according to any one of claims 18 to 28, wherein the oscillator includes an oscillator with temperature compensation. 30. The counter according to any one of claims 18 to 29, wherein the counter of the time generator can output a trigger signal of 1, 2, 5, 10, 20, 50, 100, 200, 500, or 1000 milliseconds to the outside. The simultaneous recording method of the described sensor signal and GPS time. The simultaneous recording method of the sensor signal and the GPS time according to any one of claims 18 to 30, wherein observation position data of the recording device is detected from the GPS receiver. 32. The method for simultaneously recording a sensor signal and GPS time according to any one of claims 18 to 31, wherein the storage means comprises a flash memory or a RAM memory. The method for simultaneously recording a sensor signal and GPS time according to any one of claims 18 to 32, wherein the sensor includes a seismometer or a vibration sensor. 34. The method for simultaneously recording a sensor signal and GPS time according to any one of claims 18 to 33, wherein the recording device is a portable recording device.

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