JP2724492B2 - Data logger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention receives and collects various sensor outputs of an automatic machine or the like, and analyzes a dynamic characteristic or the like of the automatic machine based on the collected data. In particular, the present invention relates to data analysis and the like that can be performed at high speed both online and offline, and that versatility is enhanced.

2. Description of the Related Art A data logger is known as a device that detects rotation and linear position and speed, cam output pattern, pressure, temperature, and the like in various automatic machines by a sensor and collects the detected sensor output data. Conventional data loggers, for example, input and collect sensor output data such as resin injection speed in an injection molding apparatus and position and speed in a servomotor, store these collected data in a tape recorder, and store the data in a tape recorder. The collected data is reproduced as needed, and is used in an offline state for process control of an injection molding apparatus and analysis of dynamic characteristics related to the position and speed of a servomotor.

[Problem to be Solved by the Invention] However, in the conventional data logger as described above, the recorded data is stored in the tape recorder, so that recording and reproducing of the recorded data is troublesome and the recorded data is recorded only in an offline state. Cannot be analyzed, data analysis of the dynamic characteristics of the machine cannot be performed while actually confirming the movement of the machine, and the circuit configuration is expensive. . In addition, there was a problem that the input circuit was not versatile because it was not an input circuit capable of responding to any sensor output signal.

The present invention has been made in view of the above points, and collects various types of sensor output data input from an automatic machine, stores the collected data in an external storage medium, and arbitrarily reads out the collected data to obtain a computer program. Can be easily transferred to a terminal device such as a computer via a communication line, and the dynamic characteristics of an automatic machine can be analyzed in an online state. An object of the present invention is to provide a data logger with improved versatility by providing an input circuit that can also handle signals.

[Means for Solving the Problems] A data logger according to the present invention comprises a data logger main body and a data logger interface separated separately from the data logger main body. A digital signal output from various sensors in an automatic machine or the like is input.A plurality of input threshold voltages can be set to arbitrary values in accordance with the digital signal levels of the connected sensors. Digital signal input means, a plurality of analog signal input means for inputting analog signals output from various sensors in the automatic machine or the like and converting them into digital signals, and input from the digital signal input means and analog signal input means Setting means for performing various settings such as processing and programming for the set data, Storage means for collecting various data input from the digital signal input means and analog signal input means, control processing means for processing the collected data and performing various controls of the apparatus, and storing the collected data stored in the storage means. Digital signal output means for outputting a digital signal to an external device;
For transmitting and receiving the acquired data and control signals between an analog signal output unit that converts the acquired data stored in the storage unit into an analog signal and outputs the analog signal to an external device, and a terminal device such as a computer. A first communication means, and a medium interface for detachably mounting an external storage medium, and transferring the acquired data stored in the storage means to the mounted external storage medium, wherein the logger interface comprises: Removably attach external storage media,
A medium interface for reading the acquired data from the loaded storage medium, and a second interface capable of transferring the read acquired data to an external computer, an automatic machine, or the like.
Communication means, and a control panel unit, and transfer the acquired data of the data logger main body offline to the logger interface via the external storage medium, and to the logger interface via the second communication means. Connected to a computer so that the acquired data can be analyzed by the computer, and connected to the logger interface via the second communication means to the automatic machine or the like to operate based on the acquired data. It is characterized by having made it possible.

[Operation] According to the present invention, a data logger interface having a simplified configuration including a medium interface, communication means, and a control panel unit is provided separately from the data logger main body. However, even in a place separated from the data logger body, by a combination of offline transfer via an external storage medium and online transfer via the communication means of the data logger interface,
It is possible to perform necessary control and analysis processing, and to achieve an excellent effect that the usability of the data logger can be extended at extremely low cost.

The 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 inputs the digital signal by adapting the input threshold voltage to the level of the digital signal output from various sensors in an automatic machine or the like. The analog signal input means inputs analog signals output from various sensors in an automatic machine or the like and converts them into digital signals. The storage unit collects various data input from the digital signal input unit and the analog signal input unit. The control processing means performs processing of the acquired data and various controls of the apparatus.

From the digital signal output means, the acquired data stored in the storage means is output as a digital signal to an external device. The analog data 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 first communication means transmits and receives the acquired data and control signals to and from a terminal device such as a computer. Further, the acquired data stored in the storage means can be transferred and stored in an external storage medium, for example, an IC memory card. In the logger interface, an external storage medium, that is, an external storage medium,
The recorded data is read from the storage medium with the IC memory card inserted therein, and the read recorded data is transferred to an external computer, an automatic machine, or the like.

As described above, the acquired data and the measurement condition data are stored in the IC memory card, the IC memory card storing the data is inserted, and the data is read out and transferred to a computer or the like via a communication line. By providing a logger interface as described above, it is possible to analyze collected data even in a place away from the data logger. Also, by connecting this logger interface to another automatic machine or the like, it becomes possible to control the machine based on the acquired data read from the IC memory card. Thus, the analysis and reproduction of the acquired data and the measurement condition data are facilitated, and the analysis and reproduction of the data can be performed either online or offline, and the sensor output signal output from an automatic machine or the like. It is possible to set the input level of the input circuit to an arbitrary threshold voltage corresponding to the level, and it is not necessary to limit the sensor output signal to a specific level, increasing versatility.
The effect can be expected.

Hereinafter, an embodiment 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 according to the present invention. The system configuration of the data logger is roughly divided into a control unit 20, a data processing unit 30, a console unit 40, a data logger body 10 including input / output units, an IC card 25 as an external storage device, and a third And a logger interface 50 shown in the figure. The control unit 20 includes the CPU 2
6 and a program ROM 21, a data RAM 23, a working RAM 22, an interface (hereinafter, referred to as an I / F) 24 for writing acquisition data to the IC card 25, and the like. Perform control. Data RAM23
Stores various collected data input from an external automatic machine, and has a storage capacity corresponding to a plurality of IC cards 25. That is, the data RAM 23 functions as a buffer memory for the collected data. IC card 25 is a card
An external storage medium that is attached to the I / F 24 and stores acquisition data and measurement condition data. As the IC card 25, for example, a static RAM or EP capable of battery backup
-A ROM or the like can be used.

The data processing unit 30 includes a digital signal processor (hereinafter, referred to as DSP) 32, and transmits and receives acquisition data to and from the control unit 20 via an I / F 31 including, for example, a dual port RAM. Performs various data processing. The data processing unit 30 is for reducing the load of software processing on the acquired data in the control unit 20, and realizes high-speed processing of digital signals by the operation of the DSP 32.

The input / output unit includes an input-only parallel I / F 11, I / F 12, a trigger input I / F 17, an analog / digital (hereinafter A / D) converter 18, and an output-only digital / analog (D / A). A) includes a converter 14, 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.
The parallel I / F 11 is a digital data input port having a configuration of 8 bits × 3 channels + 4 bits × 1 channel, and controls the position, speed, cam output pattern, pressure, temperature, etc. from an external automatic machine K-1 to K-4. Various sensor output data DD-1 to DD-4 are input. Also, the parallel I / F1
1 allows the threshold (threshold) voltage level to be set to an arbitrary value in accordance with the input signal level, and to be applied to the output voltage of circuit elements in an external machine consisting of TTL, CMOS, transistors, etc. The value of the threshold voltage can be set arbitrarily. The threshold voltage can be set to, for example, 1.5 V corresponding to the TTL level and up to 24 V corresponding to the output level of the transistor and the like.

The parallel I / F 12 is a 4-bit digital control signal input port, and receives a control signal DS from an external control device RC.
Enter The threshold voltage of the parallel I / F 12 can be set to an arbitrary value according to the input signal level. The trigger input I / F 17 inputs a 1-bit trigger signal from an external control device RC or the like. In addition, the threshold voltage can be set to an arbitrary value according to the input trigger signal level. A / D converter 1
Numeral 8 is for converting various data of analog signals output from the automatic machines K-5 and K-6 into digital signals.
Two channels are provided.

The parallel I / F 16 outputs an 8-bit digital signal to an external device G-4 such as a sequencer.
For example, when a sequencer for controlling an automatic machine is connected as the external device G-4, the collected data can be transferred to the sequencer, and the sequencer can cause the automatic machine to execute an operation corresponding to the collected data. The D / A converter 14
Is for converting a digital signal into an analog signal, is provided with two channels, and outputs recorded data and the like to the external devices G-1 and G-2. This external device G
As -1, G-2, for example, an oscilloscope, a dot recording device, or another appropriate device can be connected.

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

The console unit 40 includes an operation panel 42 including various setting switches, a display, and the like, and sends and receives data to and from the control unit 20 via the console I / F 41. An example of the operation panel 42 is shown in FIG.

The operation panel 42 is roughly divided into a display section 44, a light emitting diode (LED) display section 48, a key section 49, a level setting section 60, an IC card slot 43, a connector 45 for a serial line SD, an input / output terminal 46, and I / O. It consists of slots 47 and so on. The display unit 44 provided in the upper part is for displaying various information, and for example, a liquid crystal (LCD) display or the like can be used. The LED display unit 48 indicates each processing mode "AUT
O "," MAN "," SETD "," SETA "," TRIG "," MO
"N", "BACK UP", and the like. Key 49
Consists of a plurality of key switches for performing various settings, including “BS”, “MODE”, “START / STOP”,
It includes keys for designating each processing mode of “ENTER” and “Reset” processing, and numeric keys for inputting set values such as measurement conditions.

The card slot 43 is for mounting the IC card 25 in order to store collected data, measurement condition data, and the like in the IC card 25. The card I / F 24 described above is provided inside the card slot 43. Level setting section 60
Are provided with a changeover switch for switching the threshold voltage of each interface corresponding to each. Here, six levels of multi-level settings are possible according 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, a DSUB-25 type connector for RS-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 I / O slot 47 is for connecting various external devices.

FIG. 3 stores the acquired data and the measurement condition data.
FIG. 3 is a block diagram of a logger interface 50 in which an IC card 25 is mounted, data is read from the IC card 25, and the read data can be transferred 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 apparatus, and a card I / O.
Consists of F52.

The panel unit 51 includes, for example, a switch unit including a keyboard and the like and a display unit including liquid crystal and the like. The data specified here is provided to the control unit 53. Control unit 53
Controls and manages the entire logger interface 50 and each unit according to an instruction from the panel unit 51. The control unit 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 an IC card 25 in the data logger 10.
The acquired data and measurement condition data stored in the IC card
A slot (not shown) for reading from the IC card 25 is provided.

Various data read from the IC card 25 are transmitted to the control unit 53.
Is transmitted to the computer 55 via the communication line SD by the communication function of the. The computer 55 performs various data processing on various data received from the logger interface 50 by executing the analysis program. For example, even in a place away from the data logger 10, the computer 55 equipped with the communication line SD can analyze dynamic characteristics and learning functions of an automatic machine.

In addition, since the recorded data stored in the IC card 25 can be read at will by the card I / F 52, the card I / F 52 can be connected to another automatic machine via an appropriate communication line. Driving based on data can be performed.

Next, the operation of each section in the above configuration will be described with reference to the flowchart of FIG. After performing initial processing of an IC or the like when the power is turned on, in step 71, an LED corresponding to the “AUTO” processing of the LED display unit 48 is turned on, and the process proceeds to the next step 72.

In step 72, which key has been pressed is detected and determined. If the "ENTER" key has been pressed, the flow goes to step 73 to execute the "AUTO" process, and then returns to step 71 to repeat the above-described processes. The “AUTO” process is to execute automatic start / stop of sampling for a sensor output signal according to a program condition or an external control signal, or to automatically perform sampling for a signal to be measured by a control signal input via a communication line SD. This is a mode for setting whether to execute start / stop. If the "MODE" key is pressed in step 72, step 74
go to. If the “BS” key is pressed,
Go to 89. In step 74, the LED corresponding to the “MAN” process of the LED display unit 48 is turned on, and the process proceeds to the next step 75.

In step 75, which key is pressed is detected and determined. If the "ENTER" key is pressed, go to step 76, perform "MAN" processing, and then return to step 71,
Each process up to step 75 described above is repeated. "MAN"
The process is a mode in which sampling start / stop for the sensor output signal is set by operating a key switch of the key unit 49. If the "MODE" key has been pressed in step 75, the process proceeds to step 77. If the “BS” key has been pressed, the flow returns to step 71 to repeat the above-described processing. In step 77, the LED corresponding to the “SETD” processing of the LED display unit 48 is turned on, and the process proceeds to the next step 78.

In step 78, which key has been pressed is detected and determined. If the “ENTER” key is pressed, go to step 79, perform “SETD” processing, and then return to step 71,
Each process up to step 78 described above is repeated. "SETD"
The process is a mode in which various settings are made for the digital input signal, and it is set whether to record only the number of times of the trigger or to record the number of times of the trigger and the time of the trigger. Further, sampling conditions (for example, sampling period, number of times, etc.) for the digital signal under measurement can be set. In this step 78, select “MOD
If the “E” key is pressed, go to step 80. Also,
If the “BS” key has been pressed, the flow returns to step 74 to repeat the above-described processing. In step 80, the LED display section 48
Turn on the LED corresponding to the “SETA” processing of the next step 8
Proceed to 1.

In step 81, which key is pressed is detected and determined. If the "ENTER" key is pressed, go to step 82, perform "SETA" processing, then return to step 71,
Each process up to step 81 described above is repeated. "SETA"
The process is a mode in which various settings are made for an analog input signal. In the mode, only the number of times of trigger generation is recorded, and whether the number of times of generation and the time of trigger generation are also recorded is set. In addition, sampling conditions (for example, sampling period, number of times, etc.) for an analog signal of a sensor output can be set. In this step 81,
If the "DE" key has been pressed, go to step 83. Also,
If the “BS” key has been pressed, the flow returns to step 77 to repeat the above-described processing. In step 83, the LED display section 48
Turn on the LED corresponding to the “TRIG” processing of the next step 8
Proceed to 4.

In step 84, which key is pressed is detected and determined. If the "ENTER" key is pressed, go to step 85, perform "TRIG" processing, and return to step 71,
The processes up to step 84 described above are repeated. "TRIG"
The processing is a mode for setting various conditions of the trigger signal, and the trigger conditions for the analog and digital input signals can be programmed. If the "MODE" key has been pressed in step 84, the process proceeds to step 86. If the “BS” key has been pressed, the flow returns to step 80 to repeat the above-described processing. In step 86, the LED corresponding to the “MON” processing of the LED display unit 48 is turned on, and the process proceeds to the next step 87.

In step 87, which key has been pressed is detected and determined. If the "ENTER" key is pressed, go to step 88, perform "MON" processing, and return to step 71,
Each process up to step 87 described above is repeated. "MON"
The process is a mode for setting a monitor output of the acquired data, and can program a monitor output condition of analog and digital input signals, for example, an operation such as output and repeat output in real time. This step
If the “MODE” key is pressed at 87, go to step 89. If the “BS” key has been pressed, the flow returns to step 83 to repeat the above-described processing. In step 89, LE
Turn on the LED corresponding to the "BACK UP" process on the D display 48,
Proceed to the next step 90.

In step 90, which key has been pressed is detected and determined. If the "ENTER" key has been pressed, the flow goes to step 91, executes "BACK UP" processing, returns to step 71, and repeats the processing up to step 87 described above. "BA
The “CK UP” process is a mode in which the data RAM 23 and the IC card 25 are read / written with respect to the collected data. For example, check the file in the IC card 25,
Transfer of the acquired data to the C card 25, and transfer the acquired data stored in the IC card 25 or the data RAM 23 to the communication line SD.
For example, the data can be transferred to the terminal device G-3 via the communication line SD, the collected data can be received from the terminal device G-3 via the communication line SD, and stored in the IC card 25 or the data RAM 23. On the other hand, if the "MODE" key is pressed in step 90, the process returns to step 71 and repeats the above-described processing. If the “BS” key has been pressed, the flow returns to step 86 to repeat the above-described processing.

As described above, in the “AUTO” processing mode, the trigger condition is arbitrarily programmed or the start / stop of the sampling is set by the external control device RC, or
In the "MAN" processing mode, start / stop trigger conditions are set by communication with the terminal device G-3 via the communication line SD (steps 72 to 76). "SETD"
In the "SETA" processing mode, it is possible to record the time of occurrence of the trigger for the analog and digital input signals together with the number of triggers, or to record the sampling period and the number of times (steps 77 to 77). 82). In the "TRIG" processing mode, the trigger conditions for sampling the analog input signal and the digital input signal are programmed. For example, the input level and the interlocking of analog and digital input signals are arbitrarily programmed (steps 83 to 85). "MON"
In the processing mode, monitor output of the collected analog / digital data is set. For example, it is set to output in real time or to output a bit pattern programmed in advance according to a specified trigger condition (steps 86 to 88). After setting the conditions for data acquisition in this manner, sensor output signals are input from each of the automatic machines K-1 to K-4, data acquisition is performed, and the acquired data and measurement condition data are stored in the IC card 25. You do it.

Further, in the "BACK UP" processing mode, a list of various data files stored in the IC card 25, a data RAM 2
3 Data transfer to IC card 25, data RAM 23
Or an operation of transferring the data in the IC card 25 to the terminal device G-3 via the communication line SD, and from the terminal device G-3 to the communication line.
The operation of storing data in the data RAM 23 or the IC card 25 via SD is performed (steps 89 to 91).
By pressing the "RESET" key and a desired numeric key, a test program corresponding to the numeric key can be executed.

The versatility is high because it is not limited to the type of sensor output signal to be input as described above.
With F, data analysis can be performed both online and offline.

In this embodiment, the input / output bit widths of the parallel I / F11, I / F12, and I / F16 are described as having a 28-bit, 4-bit, and 8-bit configuration, respectively. The configuration is not limited to the example, and may be configured as appropriate. Although the number of input / output channels for analog signals has been described as two each, the present invention is not limited to this embodiment, and any other appropriate number of channels may be used.

In this embodiment, an IC memory card is used as the external storage medium. However, the present invention is not limited to the IC memory card, and any other appropriate external storage medium such as a floppy disk or an optical disk can be used. In that case, it goes without saying that a logger interface corresponding to the external storage medium to be used is configured.

In this embodiment, communication with an external computer is performed using the serial interface SIO. However, the present invention 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, a simplified configuration comprising a minimum configuration of a medium interface, communication means, and a control panel unit separately from the data logger main body. The data logger interface is provided, and even in a place separated from the data logger main body, necessary control can be performed by a combination of offline transfer via an external storage medium and online transfer via communication means of the data logger interface. And analysis processing,
It has an excellent effect that the usability of the data logger can be extended at a very low cost. A logger that stores the acquired data and the measurement condition data in an IC memory card, mounts the IC memory card storing the data, reads out the data, and transfers the data to a computer or the like via a communication line. Since the interface is provided, it is possible to analyze acquired data even in a place away from the data logger. Also, by connecting this logger interface to another automatic machine or the like, it becomes possible to control the machine based on the acquired data read from the IC memory card. Therefore, there are various excellent effects such that the analysis and reproduction of the collected data and the measurement condition data are facilitated, and the analysis and reproduction of the data can be performed either online or offline. Also, since the input level of the input circuit can be set to an arbitrary threshold voltage according to the analog / digital sensor output signal voltage output from the automatic machine, etc., the sensor output signal output from the automatic machine can be set to a specific level. It is not necessary to limit to the above, and an excellent effect that versatility is enhanced is exhibited.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a data logger according to the present invention, FIG. 2 is a diagram showing an example of an operation panel in the embodiment, and FIG. 3 is a block showing an example of a logger interface in the embodiment. FIGS. 4A and 4B are flowcharts showing an example of a processing mode executed by an internal microcomputer in the embodiment. 10 Data logger main unit, 11, 12 Input parallel interface, SIO Serial interface, 16
… Output parallel interface, 14… Digital /
Analog converter, 18… Analog / digital converter,
17 …… Trigger interface, 20,53 …… Control unit, 21…
... Program ROM, 22 ... Work RAM, 23 ... Data RA
M, 22: Card interface, 25: IC card, 26
…… Microcomputer CPU, 30 …… Data processing unit, 3
1 ... DSP interface, 32 ... Digital signal processor, 40 ... Console, 41 ... Console interface, 42 ... Operation panel, K-1 to K-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 to be measured, DS ... Digital control signal, SD ... Serial communication line, 43 ... Card slot, 44 ... Liquid crystal display, 45 ... Connector, 46 ... I / O Terminal, 47 I / O slot, 48 ...
Light-emitting diode display section, 49 key section, 60 level setting section, 50 logger interface, 51 panel section
52: Card interface, 55: Computer.

Claims (2)

(57) [Claims] 1. A data logger main body and a data logger interface separated separately from the data logger main body, wherein the data logger main body receives digital signals output from various sensors in an automatic machine or the like. A plurality of digital signal input means that can be set to an arbitrary value of each input threshold voltage by adapting to the digital signal level of the sensor connected to each, and from various sensors in the automatic machine and the like. A plurality of analog signal input means for inputting an output analog signal and converting it into a digital signal; setting means for performing various settings such as processing and programming for data input from the digital signal input means and the analog signal input means Input from the digital signal input means and the analog signal input means. Storage means for collecting the acquired various data; control processing means for processing the acquired data and controlling the apparatus; and a digital signal for outputting the acquired data stored in the storage means to an external device as a digital signal. An output unit, an analog signal output unit that converts the acquired data stored in the storage unit into an analog signal and outputs the analog signal to an external device, and a terminal device such as a computer. A first communication unit for performing transmission and reception, and a media interface for detachably mounting an external storage medium and transferring collected data stored in the storage unit to the mounted external storage medium. A medium interface for removably mounting the external storage medium and reading the acquisition data from the mounted storage medium; A second communication means capable of transferring the read-out acquisition data to an external computer, an automatic machine, or the like; and a control panel unit, wherein the acquisition data of the data logger main body is transmitted to the external storage medium. Transfer to the logger interface via an off-line, and connect the logger interface to a computer via the second communication means so that the acquired data can be analyzed by the computer. A data logger wherein the automatic machine or the like is connected via the second communication means so that operation based on the acquired data can be performed. 2. The data logger according to claim 1, wherein said external storage medium is an IC card.