JPH0814839B2 - Equipment operating status monitor-device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for monitoring the operating state of various equipment by using display lamps of control panels and operation panels of various equipment.

[Conventional technology]

In various production lines, it is required to investigate the operating states of a plurality of machinery and equipment installed on the lines, such as operating hours and operating frequencies, for the purpose of providing information for production planning and the like.

In such a case, conventionally, when monitoring the operating state of mechanical equipment, etc., wiring for monitoring is provided to a control device (for example, a spare contact such as a relay / timer) that constitutes a control circuit of the target mechanical equipment. To take out the information of mechanical equipment such as operation instruction, operation memory, operation end, abnormality etc. to the outside, and supply it to the monitoring device (operation record by chart paper, cycle counter, travel time meter), and perform monitoring. Was.

[Problems to be solved by the invention]

However, since the above-mentioned conventional monitoring device needs to be wired directly to the control circuit, etc., wiring work by an expert who is familiar with the control circuit is required. Must be cut off, which reduces the operating rate.

On the other hand, it is conceivable to manufacture the equipment in consideration of the output terminal for the monitor in advance, but there is a problem that the cost increases accordingly.

Therefore, an object of the present invention is to provide a monitor device that does not require special wiring work and can easily monitor the operating state of the equipment from the outside of the equipment without selecting the location of the equipment or the surrounding environment. .

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention makes it possible to monitor the operating state of the equipment by using various display lamps that are permanently installed in the mechanical equipment. That is,
The present invention relates to an adapter that can be attached to a display lamp that displays the operating state of equipment, a light-receiving element that is attached to the adapter so as to receive the light of the display lamp, and that converts the light into an electric signal, and the light-receiving element. A counter that receives the output signal from the counter and counts the length of the lighting or extinguishing time of the display lamp, and a display that receives the output of the counter and displays the counting time. Is.

[Action]

According to the present invention configured as described above, the operating state of equipment transmitted by the display lamp can be captured from the outside through a light receiving element in a non-contact manner only by mounting the adapter on the display lamp and converting light into an electric signal. The length of time that the indicator lamp is turned on or off is counted by a counter, and the count value is displayed on the display unit, so there is no need for special wiring work, and there is no need to stop equipment to collect information. It becomes possible to do.

In this case, the adapter, the light receiving element, the counter,
By providing the display and the display integrally, it is possible to monitor a plurality of facilities in parallel.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a monitor device according to the present invention. In FIG. 1, the light from the display lamp L is detected by the photoamplifier circuit 1 including a light receiving element. Here, the photoelectrically converted signal is ON / OFF of the signal
It is input to the pulse generation circuit 2 and the gate circuit 3 for generating a pulse corresponding to the state. The gate circuit 3 is for adjusting the timing of each signal processing.
The pulse signal is taken into the counter circuit 4 via the gate circuit 3, the time width of the pulse signal (that is, the time from the start to the stop of the equipment) is counted, and the voltage level conversion circuit 6 is again passed through the gate circuit 3. Supported by. This voltage level conversion circuit 6 is for matching with the operating voltage level of the stopwatch 11 described later. The stopwatch 11 functions as a display, and displays the count value of the counter circuit 4 as a numerical value. For this stopwatch 11, a commercially available IC for stopwatch can be used. Reference numeral 5 indicates a reset circuit for resetting the counter circuit 4 to the initial state. The reset circuit 5 holds the once-counted value until it is reset, and the stop-watch 11 displays the once-counted value. Reference numeral 7 indicates a power supply circuit, and a battery or the like should be used as a power supply in order to make the monitor device portable.

Next, the second detailed circuit example of each part of the above monitor device will be described.
The operation will be described with reference to FIG.

The power supply voltage from the dry battery 59 is supplied to the 3-unit reguilleur letter 31 when the power switch 12 is turned on, and a stable voltage is taken out.
The noise is absorbed by and is supplied to the terminal 30.

The signal S1 in FIG. 3 represents the output waveform of the photoamplifier 15. The photoamplifier 15 draws in a current proportional to the amount of light.

The linear IC 33 is a linear operational amplifier, for example, NE555 can be used. This linear IC33 is a photo amplifier 15
The waveform is shaped in response to the output of, the input is inverted and output at the logic level.

Signal 2 shows the output waveform of the linear IC 33. linear
The output of IC33 is input to one of the EX-OR gates 34. Since the other input is grounded, when the output of the linear IC 33 becomes 1, it becomes the output 1 of the EX-OR gate 34. This output is input to one of the EX-OR gates 35 and 36. E
Since the other input terminals of the X-OR gates 35 and 36 are grounded, both outputs of the EX-OR gates 35 and 36 are "1". The output of EX-OR gate 35 is connected to one input terminal of EX-OR gate 37, the output of EX-OR gate 36 charges the other side of EX-OR gate 37 while charging capacitor 38. Set to 1 ".

The waveform of the signal S3 shows the output waveform of the EX-OR gate 37, but shows a pulse having a width corresponding to the charging / discharging time width of the capacitor 38 generated at the rising and falling of the signal S2 waveform. .

Now, consider the state where the reset button 10 is pressed. signal
S13 is a terminal waveform when the reset button 10 is pressed. When the reset button 10 is pressed, the input terminal of the connected inverter gate 56 becomes "0" and its output becomes "1".

Since this output flows into the ground line via the light emitting diode 57, the input terminal of the light emitting diode 57 is clamped to the sum of the forward voltages of the two diodes (about 3V). Signal S12 is the waveform at this terminal. This signal voltage S12 is transmitted to one terminal of the reset button 18 inside the stopwatch 11 via the rectifying diode 62, and the stopwatch 11 is reset. At this time,
When the reset button 10 is pressed, the input terminal of the inverter gate 54 also becomes 0 (V), so that its output becomes "1". The signal S4 is this waveform. This output S4 is given to the reset terminals R1 and R2 of the counter 47, the counter 47 is reset, and its output terminals B1 and A2 become 0 (V).

The counter 47 is an element having two independent BCD counters, the second count output is output to the output terminal B1 for the clock CLK1 input, and the first count output is output for the clock CLK2 input. Output to terminal A2. The counting operation is performed by external wiring so that counting is performed at the rising edge of the clock pulse.

On the other hand, since the output of the inverter gate 54 is also input to the NAND gate 53, the output of the NAND gate 53 becomes 0 (V). This output causes one input terminal of the AND gate 50 to be 0 (V) while discharging the capacitor 52. The waveform of the signal S5 shows the waveform of this input terminal section. AND gate 50
Since the output of the AND gate is connected to one of the input terminals of the AND gate 51, the output of the AND gate 51 becomes 0 (V). Since the output of the AND gate 51 is connected to the input terminal CLK2 of the counter 47, this input terminal CLK2 also becomes 0 (V). When the reset button 10 is released, the input terminal of the inverter gate 54 is "1".
Therefore, the output terminal becomes 0 (V). The output of the inverter gate 54 is the reset terminals R1 and R2 of the counter 47.
Since it is connected to the counter 47, the reset of the counter 47 is released. Since the output of the inverter gate 54 is also input to the NAND gate 53, the output of the NAND gate 53 becomes "1".
This output is the AND gate 50 while charging the capacitor 52.
Set one of the input terminals to “1”. Since the other input terminal of the AND gate 50 is connected to the output of the linear IC 33 via the inverter gate 49, the output of the linear IC 33 is 0 (V).
When, that is, when the photo amplifier 15 is not receiving light, AN
“1” is output to the output terminal of the D gate 50. The output of the AND gate 50 is supported by one input terminal of the AND gate 51. The other input terminal of the AND gate 51 becomes "1" when the counter 47 is reset. When both input terminals of the AND gate 51 become "1", the output terminal of the AND gate 51 becomes "1". Since this output is input to the CLK2 input terminal of the counter 47, the counter 47 starts counting operation, and "1" is output to its output terminal A2. This output is an inverter gate
Since it is given to one input terminal of the AND gate 51 via 48, the output of the AND gate 51 becomes 0 (V), and the input terminal CLK2 of the counter 47 also becomes 0 (V). The signal S6 is the waveform of the input terminal CLK2 of the counter 47, and the signal S7 is the waveform of the output terminal A2 of the counter 47. NAND gate 43
One of the input terminals is connected to the output terminal B1 of the counter 47. Since the output terminal B1 is 0 (V) at reset, the output of the NAND gate 43 is "1". Also NA
The input terminal of the AND gate 39 connected to the output terminal of the ND gate 43 is also "1".

The output terminal A2 of the counter 47 is set to "1", so NA
The input terminal of the ND gate 46 is also "1". AND gate 3
When both input terminals of 9 become "1", the output of AND gate 39 becomes "1"
Then, while charging the capacitor 40, one input terminal of the NAND gate 41 is set to "1". Signal S9 is NAND gate 41
One of the input waveforms.

The output terminal of the EX-OR gate 37 is connected to the other input terminal of the NAND gate 41. When the other input terminal becomes "1", the output of the NAND gate 41 becomes 0 (V). Since the CLK1 input terminal of the counter 47 is connected to the NAND gate 41 output terminal via the inverter gate 42, the CLK1 input terminal of the counter 47 becomes "1" and the counter 47 counts "1". The output terminal of the inverter gate 42 is NA
Since it is connected to one input terminal of the ND gate 44, this input terminal also becomes "1". Since the other input terminal of the NAND gate 44 is "1", the output of the NAND gate 44 is 0 (V)
become. One input terminal of the AND gate 46 is the NAND gate 44
Since the output terminal of is connected through the inverter gate 45, this terminal becomes "1", and the other input terminal of the AND gate 46 becomes "1", so the output of the AND gate 46 becomes "1". , And a pulse having a pulse width similar to that of the EX-OR gate 37 is output. This pulse is a light emitting diode 55
Since it flows into the ground line via
The input terminal of is clamped at about 3V, which corresponds to the forward voltage drop of two light emitting diodes. The signal S11 is the waveform of this part. This pulse is transmitted through the rectifying diode 61 to one terminal of the start switch and stop switch 16 inside the stop watch 11, and the start watch 11 is started. When a pulse is again output from the EX-OR gate 37 in this state, one input terminal of the NAND gate 41 is set to "1", so the output of the NAND gate 41 becomes 0 (V) and the inverter gate 42 Via the clock input terminal CLK1 of the counter 47. Then, the counter 47 counts the second pulse and its output terminal B1 becomes "1". The input terminal of the NAND gate 43 connected to this output terminal B1 also becomes "1". One input terminal of the NAND gate 44 is connected to the output of the inverter gate 42, and the other is connected to the output terminal of the NAND gate 43.
An inverted waveform of the output of the inverter gate 42, that is, a “0” pulse is output to the output terminal of the gate 44 during the delay time due to the discharge time of the capacitor 63. The output terminal of the NAND gate 44 is connected to one terminal of the AND gate 46 via the inverter gate 45, and the other input terminal of the AND gate 46 is set to "1". Outputs a "1" pulse. AND gate 39
Since one of the inputs is connected to the output terminal of the NAND gate 43, the output terminal of the AND gate 39 becomes 0 (V), and its output is the one input terminal of the NAND gate 41 while discharging the capacitor 40. Set to 0 (V). Then, the output becomes "1", and the input CLK1 of the counter 47 connected from the NAND gate 41 through the inverter gate 42 is 0 (V).
It never becomes "1". When the reset button 10 is released, the condenser 52 delays the time to the input terminal CLK2 of the counter 47 to input a pulse to the counter 47.
To ensure the operation of. The condenser 40 is a linear IC33
When the output of the linear IC 33 becomes 0 (V) after pressing and releasing the reset button 10 while "1" is being output, the pulse is not transmitted to the start / stop button terminal 16 in the stop switch 11. This is for the purpose of delaying, and this has the function of always detecting an accurate start point of one cycle regardless of whether light is received.

The above monitoring device has a function to judge the middle of the cycle or the start time, and even if this monitoring device is set during the operation of the cycle, the start of the next new cycle can be accurately detected and the indicator lamp It has a function to count the lighting time, and once one cycle is completed,
It will not count the next new cycle unless the monitor is reset.

Next, FIG. 4 shows an external structure example of the monitor device having the above internal configuration. 4A is a plan view, FIG. 4B is a front view seen from the light receiving side, and FIG. 4C is a rear view seen from the stopwatch side.

Reference numeral 13 is an adapter for mounting on a display lamp, and a photo sensor (photo amplifier) 15 is mounted on the front surface thereof. The adapter 13 is attached to the case 14,
The circuits described above are built in the case 14.
A reset button 10 and a power switch 12 are mounted on the case 14 so that they can be operated externally, and a stopwatch 11 is provided on the back side of the case 14 with its counting display 11 'exposed. 16 is the start / stop button, 17
Is a mode switch button, 18 is a reset button, and 19 is a printed board.

At the time of use, the adapter 13 is attached toward the indicator lamp. Then, since the photo sensor 15 automatically faces the display lamp, the lighting or extinguishing state of the display lamp is detected, the lighting time of the display lamp is measured by the operation described above, and the display 11 'of the stopwatch 11 displays. Will be done.

In this way, according to this monitor device, the cycle time measurement results are collected from the set equipment when needed,
You can look it up. Also, one person can measure in parallel (when measuring the cycle time of equipment such as a line) in parallel. Further, there is an advantage that an operation error by a person does not occur.

〔The invention's effect〕

As described above, according to the configuration of the present invention, it is possible to easily monitor the operating state of the equipment from the outside without requiring any special wiring work, and in the outside of the power supply wiring equipment or near the center of the factory. In addition to the location, it is possible to monitor the operating state even outdoors in the daytime with a lot of light, or in the vicinity of a robot or the like for welding work.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing details of each block, FIG. 3 is a waveform diagram showing signal waveforms of respective parts of FIG. 2, and FIG. 4 (a) is The monitor device is a plan view, (b) is a front view, and (c) is a rear view. 1 ... Photoamplifier circuit, 2 ... Pulse generation circuit, 3 ...
... Gate circuit, 4 ... Counter circuit, 5 ... Reset circuit, 6 ... Voltage level conversion circuit, 7 ... Power supply circuit, 10 ...
… Reset button, 11 …… Stopwatch, 12 …… Power switch, 13 …… Adapter, 14 …… Case, 15 …… Photosensor.

Claims (2)

[Claims] 1. An adapter which can be used even in existing equipment and which can be attached to a display lamp for displaying the operating state of equipment used even in new equipment, and is attached to the equipment via the adapter. A photoelectric conversion light receiving element arranged to receive the light of the display lamp and a counter for counting either one of the lighting and extinguishing times of the display lamp by an electric signal from the light receiving element and the output of the counter. In an operating state monitoring device for equipment, comprising an indicator for receiving and displaying, the adapter has a cylindrical shape, one end side of which covers the light receiving element, and the other end side thereof covers a light emitting portion of the display lamp. An operating state monitor device for equipment, characterized in that the adapter, the light receiving element, the counter, and the display unit are integrated in a single case. 2. An operating state monitoring device for equipment according to claim 1, wherein a portable DC power supply device which does not require wiring connection to the outside is further housed and integrated in the case.