JPH02208517A - Data logger - Google Patents

Abstract

PURPOSE:To enable analysis and reproduction of data both on and offlines by storing a collected data and a measuring conditions data into an IC card to enable analysis of the logged data even at a location away from a data logger body. CONSTITUTION:Logged data and measuring conditions data are stored into an IC card 25 and a logger interface is provided to mount the card 25 so that the data are read out to be transported to a computer CPU 26 through a communication circuit. As a result, analysis or the like of the logged data can be conducted even at a location away from a data logger body 10. The logger interface can be connected to another automatic machine or the like to control the machine from the logged data read from the card 25. This facilitates analysis and reproduction of the logged data and the measuring conditions data while enabling analysis and reproduction of data both off and onlines.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a data logger ( (data acquisition device)
In particular, the present invention relates to the ability to perform data analysis at high speed either online or offline, and to increase versatility.

[Prior art] Sensors detect rotational and linear positions and speeds, cam output cover turns, pressure, temperature, etc. in various automatic machines.
A data logger is known as a device that collects this detected sensor output data.

Conventional data loggers input and collect sensor output data such as the resin injection speed in an injection molding machine and the position and speed of a servo motor, and store these collected data in a tape recorder. The collected data is played back as necessary and used offline for process control of injection molding equipment and analysis of dynamic characteristics related to the position and speed of servo motors.

[Problems to be Solved by the Invention] However, in the conventional data logger as described above, the acquired data is stored in a tape recorder, so recording and reproducing the acquired data is troublesome, and the acquired data can only be recorded in an offline state. Since analysis is not possible, it is not possible to analyze data such as the dynamic characteristics of the machine while actually visually checking the movement of the machine, and the circuit configuration is also expensive. Furthermore, there was a problem in that the input circuit was not compatible with any kind of sensor output signal, so it lacked versatility.

This invention has been made in view of the above-mentioned points, and it collects various sensor output data input from automatic machines, stores the collected data in an external storage medium, and reads out the collected data arbitrarily to create a computer. It has also become possible to analyze the dynamic characteristics of automatic machines online with a terminal device such as a computer via a communication line. The present invention aims to provide a data logger with increased versatility by providing an input circuit that can also handle signals.

[Means for Solving the Problems] A data logger according to the present invention inputs digital signals output from various sensors in automatic machines, etc., and arbitrarily adjusts the input threshold voltage to adapt to the level of the digital signals. a plurality of digital signal input means that can be set to a value of , a plurality of analog signal input means that input analog signals output from various sensors in the automatic machine etc. and convert them into digital signals, and the digital signal input means a setting means for performing various settings such as processing and programming on data inputted from the digital signal inputting means and the analog signal inputting means; and a storage means for collecting various data inputted from the digital signal inputting means and the analog signal inputting means.

a control processing means for processing the acquired data and various controls of the apparatus; a digital signal output means for outputting the acquired data stored in the storage means as a digital signal to an external device; an analog signal output means for converting the acquired data into an analog signal and outputting it to an external device; and a first communication means for transmitting and receiving the acquired data, control signals, etc. to and from a terminal device such as a computer. , an external storage medium to which the acquired data stored in the storage means is transferred, and the external storage medium is attached and the acquired data is read from the storage medium,
It is equipped with a logger interface equipped with a second communication means that can transfer the read collected data to an external computer, automatic machine, etc.

[The operation setting means performs various settings such as processing and programming for data input from the digital signal input means and the analog signal input means. The digital signal input means adapts an input threshold voltage to the level of digital signals output from various sensors in automatic machines, etc., and inputs the digital signals. The analog signal input means inputs analog signals output from various sensors in automatic machines and converts them into digital signals. The storage means collects various data input from the digital signal input means and the analog signal input means. The control processing means processes the acquired data and performs various controls on the device.

The digital signal output means outputs the acquired data stored in the storage means to an external device as a digital signal. The analog signal output means converts the acquired data stored in the storage means into an analog signal and outputs the analog signal to an external device.

At this time, the acquired data, control signals, etc. are exchanged with a terminal device such as a computer using the first communication means. Further, the collected data stored in the storage means can be transferred to and stored in the external storage medium 1, for example, an IC memory card. In the logger interface, an external storage medium, that is, an IC memory card is attached to the logger interface, and the acquired data is read from the storage medium, and the read acquired data is transferred to an external computer, automatic machine, etc.

As mentioned above, the acquired data and measurement condition data are stored in an IC memory card, and the IC memory card storing this data is inserted to read out the data and transfer it to a computer etc. via a communication line. By providing a logger interface, it becomes possible to analyze acquired data even at a location far from the data logger. Furthermore, this logger interface can be connected to other automatic machines, etc., and the machines can be controlled based on the collected data read from the IC memory card. In this way, the analysis and reproduction of acquired data and measurement condition data becomes easy, and the data can be analyzed and reproduced either online or offline, and sensor output signals output from automatic machines etc. It is possible to set the input level of the input circuit to an arbitrary threshold voltage corresponding to the level, and there is no need to limit the sensor output signal to a specific level, increasing versatility.
This effect can be expected.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing one embodiment of a data logger related to the present invention. The system configuration of this data logger is roughly divided into a control section 20, a data processing section 30. Data logger body 10 including console section 40 and each input/output section
, an IC card 25 as an external storage device, and a logger interface 50 shown in FIG. The control unit 20 has an interface (hereinafter referred to as
(referred to as I/F) 24, etc., and manages and operates the entire device and performs various controls. The data RAM 23 is
It stores various collected data inputted from an external automatic machine, and has a storage capacity corresponding to a plurality of IC cards 25. In other words, the data RAM 23 functions as a buffer memory for acquired data. The IC card 25 is an external storage medium that is attached to the card I/F 24 and stores acquired data and measurement condition data.

As the IC card 25, for example, a static RAM, an EP-ROM, etc. that can be backed up by a battery can be used.

The data processing section 30 includes a digital signal processing processor (
32 (hereinafter referred to as DSP), for example,
Acquired data is sent and received to and from the control unit 2Q via an I/F 31 consisting of a dual port RAM, etc., and various data processing is performed.

This data processing section 30 aims to reduce the burden of software processing on acquired data in the control section 20, and realizes high-speed processing of digital signals by the function of the DSP 32.

The input/output section is an input-only parallel I/Fil.

I/F 12, trigger input I/F 17, analog/digital (hereinafter referred to as A/D) converter 18, and output-only digital/analog (hereinafter referred to as D/A) converter 1
4, a parallel I/F 16, and a serial interface (hereinafter referred to as SIO) for communicating with a terminal device G-3 such as a computer. Parallel I/F
il is a digital data input port consisting of 8 bits x 3 channels + 4 bits x 1 channel, and can be used to input various sensors such as position, speed, cam output cover pattern, pressure, temperature, etc. from -1 to -4 to an external automatic machine. Output data DD-1
~DD-4 is input. In addition, the parallel I/Fil
It is possible to set the threshold voltage level to an arbitrary value according to the input signal level, and it is possible to set the threshold voltage level to an arbitrary value depending on the output voltage of the circuit element in the external machine such as TTL, CMO3, transistor, etc. The threshold voltage value can be set arbitrarily. The threshold voltage can be set, for example, to 165V corresponding to the TTL level, and to a maximum of 24V corresponding to the output level of the transistor, etc.

The parallel I/F 12 is a 4-bit digital control signal input port, and inputs a control signal DS from an external control device RC. The threshold voltage of the parallel F/F12 can also be set to an arbitrary value depending on the input signal level. The trigger input I/F 17 is for inputting a 1-bit trigger signal from an external control device RC or the like. Further, the threshold voltage can be set to an arbitrary value depending on the input trigger signal level. The A/D converter 18 converts various data of the analog signal outputted from the -5°K-6 to the automatic machine into a digital signal, and is provided with two channels.

Parallel I/F16 is for external equipment G-4 such as a sequencer.
It outputs an 8-bit digital signal. For example, if a sequencer that controls an automatic machine is connected as the external device G-4, the acquired data can be transferred to the sequencer and the sequencer can cause the automatic machine to perform an operation according to the acquired data. The D/A converter 1-4 converts a digital signal into an analog signal, is provided with two channels, and outputs acquired data and the like to external devices G-1 and G-2. As the external devices G-1 and G-2, for example, an oscilloscope, a dot recording device, or other appropriate devices can be connected.

The serial interface SIO converts parallel data into serial data, transmits the converted serial data to the terminal device G-3 via the communication line SD, and also inputs the data from the terminal device G-3 via the communication line SD. This converts serial data into parallel data. For example, those conforming to standards such as R8-232C and R5-422 can be used.

The console section 4o consists of an operation panel 42 including various setting switches, a display, etc., and transmits and receives data to and from the control section 2o via the console I/F 41. An example of this operation panel 42 is shown in FIG. 2.

The operation panel 42 is roughly divided into a display section 44, a light emitting diode (LED) display section 48, a key section 49, and a level setting section 6.
0, an IC card slot 43, a serial line SD connector 45, an input/output terminal 46, an I10 slot 47, and the like. The display section 44 provided in the upper part is for displaying various information, for example, a liquid crystal display (LCD).
) Display device etc. can be used. LED display section 48
is each indicated processing mode "rAUTO", rMANJ
, rsETDJ, rsETAJ, rTRIGJ, rMO
NJ, rBACK UPJ, etc. are displayed. The key part 49 consists of a plurality of key switches for making various settings, rBsJ, rMODEJ, r
It includes keys for specifying START/5TOPJ, rENTERJ processing modes and rResetJ processing, and numeric keys for inputting setting values such as measurement conditions.

The card slot 43 is used to store acquired data, measurement condition data, etc. in the IC card 25.
5 is attached. Inside this card slot 43, the aforementioned card E/F24 is provided. The level setting section 60 is provided with a changeover switch for changing over the threshold voltage of each corresponding interface. Here, six levels of multi-level settings are possible corresponding to the sensor output of the automatic machine.

The connector 45 is an interface connector for communicating with the terminal device G-3, and is, for example, an interface connector for communicating with the terminal device G-3.
This is a DSUB-25 type connector for 232C. The input/output terminal 46 is an input/output terminal for two channels of analog signals and a trigger signal input terminal, and the I10 slot 47 is for connecting various external devices.

Figure 3 shows the I
FIG. 2 is a block diagram of a logger interface 50 that can be equipped with a C card 25, read data from the IC card 25, and transfer the read data to a computer via a communication line. The logger interface 50 includes a panel section 51 for performing various settings, a control section 53 for managing and controlling the communication line SD and the entire device, and a card I/F 52.

The panel section 51 includes, for example, a switch section consisting of a keyboard or the like, and a display section consisting of a liquid crystal or the like. The data specified here is given to the control unit 53. The control section 53 controls and manages the entire logger interface 50 and each section according to instructions from the panel section 51. This control section 52 has a serial communication function and can communicate with a computer or the like having the same serial communication function.

The card I/F 52 is for reading the acquired data and measurement condition data stored in the IC card 25 in the data logger 10 from the IC card 25.
A slot (not shown) for mounting a card 25 is provided.

Various data read from the IC card 25 are as follows.

The information is transmitted to the computer 55 via the communication line SD by the communication function of the control unit 53. computer 55
By executing the analysis program, various data processing is performed on the various data received from the logger interface 50.

For example, even if the computer 55 is located away from the data logger 10, it is possible to analyze the dynamic characteristics and learning functions of the automatic machine using the computer 55 equipped with the communication line SD.

In addition, since the collected data stored in the IC card 25 can be read out at will by the card I/F 52, the data can be read by connecting the card I/F 52 to other automatic machines via an appropriate communication line. You will be able to drive based on data.

Next, the operation of each part in the above-described configuration will be explained with reference to the flowchart of FIG. 4. After turning on the power and performing initial processing on the IC, etc., the J*L
ED display section 48 LE corresponding to AUTOJ processing
Turn on D and proceed to the next step 72.

In step 72, it is determined which key has been pressed. If the rENTERJ key is pressed, the process goes to step 73 and executes the rAUTOJ process, and then returns to step 71 to repeat the above-described processes.

rAUTOJ processing is to automatically start/stop sampling for sensor output signals according to program conditions or external control signals, or to
In this mode, it is set whether to automatically start/stop sampling of the signal under test based on the control signal input through D. In this step 72, rM
If the ODEj key is pressed, go to step 74;
If the rBsJ key is pressed, the process goes to step 89. In step 74, the rMAN
The LED corresponding to the J process is turned on, and the process advances to the next step 75.

In step 75, which key has been pressed is detected and determined. If the rENTERJ key is pressed, step 7
Step 71 after going to G and performing rMANJ processing
The process returns to step 75 and repeats the processes up to step 75 described above. The rMANJ process is a mode in which sampling of the sensor output signal is started/stopped by key switch operation of the key unit 49.

If the rMODIEJ key is pressed in step 75, the process goes to step 77. If the rBSJ key is pressed, the process returns to step 71 and repeats the processes described above.

In step 77, the LED corresponding to the rSETDJ process on the LED display section 48 is turned on, and the process proceeds to step 78.

In step 78, it is determined which key has been pressed. If the rENTERJ key is pressed, step 7
9, executes the "SIl!TD" process, returns to step 71, and repeats each process up to step 78 described above. Yes, and set whether to record only the number of trigger occurrences or whether to record the number of occurrences and the trigger occurrence time as well. Also,
Sampling conditions (for example, sampling period, number of times, etc.) for the digital signal under test can be set. If the rMODEJ key is pressed in step 78, the process goes to step 80. If the I[SJ key is pressed, the process returns to step 74 and the above-described processes are repeated. In step 80, the rsE of the LED display section 48 is
Turn on the LED corresponding to TAJ processing and proceed to the next step 8.
Go to 1.

In step 81, which key has been pressed is detected and determined. If the rENTERJ key is pressed, the process goes to step 82, executes the rsETAJ process, returns to step 71, and repeats each process up to step 81 described above. The rsETAJ process is a mode in which various settings are made for the analog input signal, and it is set whether only the number of trigger occurrences is to be recorded, or whether the number of occurrences and the trigger occurrence time are also to be recorded. Also, the sampling conditions for the analog signal of the sensor output (for example,
(sampling period, number of times, etc.) can be set.

If the rMODEJ key is pressed in step 81, the process goes to step 83. If the rBSJ key is pressed, the process returns to step 77 and the aforementioned processes are repeated. In step 83, r7RIG of the LED display section 48
The LED corresponding to the J process is turned on, and the process proceeds to the next step 84.

In step 84, it is determined which key has been pressed. If the rENTERJ key is pressed, step 8
Step 5 and after performing rTRIGJ processing go to Step 7.
1 and repeats each process up to step 84 described above. rTRIGJ processing is a mode for setting various conditions of trigger signals, and it is possible to program trigger conditions for analog and digital input signals.

If the rMODEJ key is pressed in step 84, the process goes to step 86. If the rBsJ key is pressed, the process returns to step 80 and the aforementioned processes are repeated. In step 86, the r MON of the LED display section 48 is
Turn on the LED corresponding to J processing and proceed to the next step 87
Proceed to.

In step 87, which key has been pressed is detected and determined. If the rENTERJ key is pressed, step 8
Step 8 and after performing rMONJ processing step 71
Returning to step 87, the processes up to step 87 described above are repeated. r MON J processing is a mode that sets the monitor output of acquired data, and monitor output conditions of analog and digital input signals, such as real-time output,
Operations such as repeat output can be programmed. If the "rMODE" key is pressed in this step 87, the process goes to step 89. If the rBsJ key is pressed, the process returns to step 83 and repeats each process described above.In step 89, the LED display section 48 rB of
The LED corresponding to the ACK UPJ process is turned on and the process proceeds to the first step 90.

In step 90, it is determined which key has been pressed. If the rENTERJ key is pressed, the process goes to step 91, executes the rBACK UPJ process, returns to step 71, and repeats each process up to step 87 described above. The rBACK UPJ process is a mode in which reading and writing operations of acquired data to and from the data RAM 23 and rc card 25 are executed.

For example, file confirmation in the IC card 25, data RA
Transfer of acquired data from M23 to IC card 25,
Transfer the collected data stored in the IC card 25 or data RAM 23 to the terminal device G-3 via the communication line SD, receive the collected data from the terminal device G-3 via the communication line SD, and transfer the collected data to the IC card 25 or the data. Processing such as storing the data in the RAM 23 can be performed. On the other hand, if the rMODEJ key is pressed in step 90, the process returns to step 71 and repeats the above-mentioned processes.
If the J key is pressed, the process returns to step 86 and the aforementioned processes are repeated.

In this way, in rAUTOJ processing mode, trigger conditions can be programmed arbitrarily, or sampling start/stop can be set by external control device RC, or in rMANJ processing mode, communication with terminal device G-3 can be performed via communication line SD. The start/stop trigger conditions are set through communication (steps 72 to 7).
6) In the "rsETDJ and rSETA" processing modes, is it possible to record the number of sampling trigger occurrences and the time of occurrence for analog and digital input signals?

It is also possible to set the sampling period and number of times to be recorded (steps 77 to 82). The rTRIG processing mode programs sampling trigger conditions for analog and digital input signals. For example, you can program the input level or the interlocking of analog and digital input signals as desired (step 8).
3-85). "In the AONJ processing mode, you set the monitor output of the acquired analog/digital data. For example, you can set it to output in real time or to output a pre-programmed bit pattern according to a specified trigger condition. Steps 86-88
). After setting the conditions for data acquisition in this manner, the sensor output signals from -1 to -4 are input to each automatic machine to execute data acquisition.

This acquired data and measurement condition data are transferred to the IC card 2.
It is stored in 5.

Furthermore, in the rBACK UPJ processing mode, various data files stored in the IC card 25 are restored, data in the data RAM 23 is transferred to the IC card 25, and data in the data RAM 23 or the IC card 25 is transferred via the communication line SD. Operations such as transferring the data to the terminal device G-3 and storing the data from the terminal device G-3 into the data RAM 23 or the IC card 25 via the communication line SD are performed (steps 89 to 91).
By pressing the REsETJ key and a desired number key, the test program corresponding to the number key can be executed.

As mentioned above, it is highly versatile because it is not limited to the type of sensor output signal that should be input, and it can also be used with an IC card and logger 1.
/Ft-ff allows data analysis both online and offline.

In addition, in this embodiment, the parallel I/Fil, I/F12
．． Although the input/output bit widths of the I/F 16 are described as being 28 bits, 4 bits, and 8 bits, respectively, these input/output bit widths are not limited to this embodiment, and may be configured in other appropriate configurations. Furthermore, although the number of input and output channels for analog signals is described as two channels each, the number of channels is not limited to this example, and any other appropriate number of channels may be used.

Note that although an IC memory card is used as the external storage medium in this embodiment, it is not limited to the IC memory card, but other appropriate external storage media such as a floppy disk or an optical disk can be used. In that case, it goes without saying that the logger interface should be configured according to the external storage medium to be used.

In this embodiment, a serial interface SIO is used to communicate with an external computer, but the communication is not limited to serial data communication, and may be parallel communication using a parallel I/F.

[Effects of the Invention] As described above, according to the present invention, acquired data and measurement condition data are stored in an IC memory card, and the data is read out by the IC memory card storing the data and read out from the computer. Since a logger interface that transfers data via a communication line is provided to the data logger, etc., it becomes possible to analyze the collected data even at a location far from the data logger. Furthermore, this logger interface can be connected to other automatic machines, etc., and the machines can be controlled based on the collected data read from the IC memory card. Therefore, it is possible to easily analyze and reproduce acquired data and measurement condition data, and the data can be analyzed and reproduced either online or offline, which provides various excellent effects. In addition, it is possible to set the input level of the input circuit to an arbitrary threshold voltage according to the analog/digital sensor output signal voltage output from automatic machines, etc., so the sensor output signal output from automatic machines can be set to a specific level. This has the excellent effect of increasing versatility without having to be limited to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a data logger according to the present invention, and FIG. 2 is a diagram showing an example of an operation panel in the same embodiment. FIG. 3 is a block diagram showing an example of a logger interface in the same embodiment, and FIGS. 4(a) and 4(b) are flowcharts showing an example of a processing mode executed by the internal microcomputer in the same embodiment. 10... Data logger body, 11.12... Parallel interface for input, SIO... Serial interface, 16... Parallel interface for output,
14... Digital/analog converter, 18... Analog/digital converter, 17... Trigger interface, 20.53... Control unit, 21... Program ROM, 22... RAM for work , 23... Data RAM, 24... Card interface, 25...
IC card, 26... microcomputer CPU,
30... Data processing section, 31... DSP interface, 32... Digital signal processing processor section, 4
0...Console part, 41...Console part interface, 42...Operation panel. K-1 to -6... Automatic machine, RC... External control device, G-1, G-2, G-4... External equipment, G-3.
...Terminal device, DD-1 to DD-4...Digital signal under test, DS...Digital control signal, SD...
Serial communication line. 43...Card slot, 44...Liquid crystal display section, 4
5... Connector, 46... Input/output terminal, 47...
I10 slot, 48... Light emitting diode display section, 4
9...Ki part, 60...Level setting part, 50...
Logger interface, 51...Panel section, 52...
- Card interface, 55...computer.

Claims (2)

[Claims] (1) A plurality of digital signal input means for inputting digital signals output from various sensors in automatic machines, etc., and capable of setting an input threshold voltage to an arbitrary value in accordance with the level of the digital signals; a plurality of analog signal input means for inputting analog signals output from various sensors in the automatic machine etc. and converting them into digital signals; and processing for data input from the digital signal input means and the analog signal input means. Setting means for performing various settings such as programming; storage means for collecting various data inputted from the digital signal input means and analog signal input means; and control processing means for processing the collected data and various controls of the device. and digital signal output means for outputting the acquired data stored in the storage means as a digital signal to an external device; converting the acquired data stored in the storage means into an analog signal and outputting it to the external device. a first communication means for transmitting and receiving the acquired data, control signals, etc. to and from a terminal device such as a computer; and an external device to which the acquired data stored in the storage means is transferred. a second storage medium, which is capable of attaching the external storage medium, reading the acquired data from the storage medium, and transmitting the read acquired data to an external computer, automatic machine, etc.;
a logger interface equipped with a communication means, a computer is connected to the logger interface so that the acquired data can be analyzed by the computer, and an automatic machine is connected to the logger interface to enable the computer to analyze the acquired data. A data logger that is characterized by being able to operate based on the following. (2) The data logger according to claim 1, wherein the external storage device is an IC card.