JP5460398B2 - Detection device - Google Patents

Description

  The present invention relates to a detection device capable of outputting information on internal parameters to the outside.

  Conventionally, when a state of a detection target (dirt, deformation, etc.) or a change in capability of a detection device (dirt, deterioration with time, etc.) occurs, an operator adjusts internal parameters such as gain and offset to appropriate values. For example, if the detection signal gradually decreases due to the dirt on the detection device, the sensitivity of the detection device is adjusted to gradually increase. At this time, since the operator manually adjusts, it is possible to determine whether or not the adjusted sensitivity is appropriate. That is, when an excessive sensitivity setting is required, it can be recognized that dirt is heavily attached, and the necessity of removing dirt can be recognized.

  On the other hand, a detection device capable of remotely adjusting internal parameters such as gain and offset (so-called remote tuning) is known (see, for example, Patent Document 1). A detection device capable of remote tuning usually includes one signal input unit and one signal output unit. In addition, it is possible to switch between two operation states (operation modes): a detection state (detection mode) and an adjustment state (adjustment mode). In the detection mode, the detection device operates to output a detection signal corresponding to the detection target from the signal output unit. In the adjustment mode, the internal parameter setting is automatically adjusted based on an external signal input to the signal input unit.

JP 2009-60665 A

  In the conventional remote tuning, the remotely adjusted internal parameters cannot be recognized on the remote device side. That is, since the detection device has only one signal output unit for outputting the detection signal, there is a problem that the value of the internal parameter of the detection device cannot be output and cannot be confirmed from the outside. Therefore, there is a method of solving the problem by adding a signal line for transmitting the value of the internally adjusted remote parameter from the detection device to the remote device. However, this method has a drawback that the wiring increases. In addition, if the parameter signal output unit is provided, the number of signal output units becomes two, which increases the cost of the detection device. In addition, two signal input units are provided on the remote device that receives signals from the detection device. Therefore, there is a possibility that the conventional signal input unit cannot be handled by one remote device (that is, the detection device cannot be connected).

  The present invention has been made to solve the above-described problems, and has an object of enabling output of parameters set inside a detection apparatus to the outside without increasing the number of signal output units. To do.

Detection device according to claim 1 of the present invention, a signal input unit that receives input signals from a remote adjustment device, and a signal output section for outputting a signal to the remote adjustment device, detects the state of the detection target, the detection target A detection mode in which the detection signal corresponding to the state is corrected with an internal parameter and output from the signal output unit, an adjustment mode for adjusting an internal parameter that needs to be adjusted in accordance with a change in the state of the detection target or a change in the capability of the own device, Among the confirmation modes in which the internal parameter information is output from the signal output unit, a function switching unit that executes at least one mode in accordance with a signal received by the signal input unit is provided.

  According to a second aspect of the present invention, in accordance with a signal received by the signal input unit, one of the detection mode and the sequence of the adjustment mode and the confirmation mode is executed.

  According to a third aspect of the present invention, a detection mode is executed when there is no signal input at the signal input unit, and when there is a signal input at the signal input unit, either the adjustment mode or the confirmation mode is executed according to the signal. It is something to be made.

  According to a fourth aspect of the present invention, the detection mode is executed when there is no signal input at the signal input unit, and the sequence of the adjustment mode and the confirmation mode is executed when there is a signal input at the signal input unit. .

  According to a fifth aspect of the present invention, at least one of the detection mode, the adjustment mode, and the confirmation mode is executed in accordance with the length of the signal received by the signal input unit.

  According to the first to fifth aspects of the present invention, at least one of the detection mode, the adjustment mode, and the confirmation mode is executed according to the signal received by the signal input unit. Without increasing the number, it is possible to output the detection signal and information related to parameters set inside the detection device from one signal output unit to the outside.

It is a block diagram which shows the structure of the detection apparatus and remote apparatus which concern on Embodiment 1 of this invention. 4 is a correspondence table of input signals, modes, and output signals followed by the detection apparatus according to Embodiment 1. It is a correspondence table of the input signal, mode, and output signal which the detection apparatus concerning Embodiment 2 follows. It is a correspondence table of the input signal, mode, and output signal which the detection apparatus which concerns on Embodiment 3 follows. 10 is a correspondence table of input signals, modes, and output signals followed by the detection apparatus according to the fourth embodiment. 10 is a correspondence table of input signals, modes, and output signals followed by the detection apparatus according to the fifth embodiment.

Embodiment 1 FIG.
The detection apparatus 10 shown in FIG. 1 corrects a signal corresponding to a physical quantity indicating a change in a detection target with a signal input unit 11 that receives a signal input from the outside, a signal output unit 12 that outputs a signal to the outside, and an internal parameter. A detection unit 13 that performs internal parameter storage, a parameter adjustment unit 15 that adjusts the internal parameter, and at least one of a detection mode, a confirmation mode, and an adjustment mode. And a function switching unit 16.

  The remote adjustment device 20 communicates with the detection device 10 and outputs a signal designating at least one of the detection mode, the confirmation mode, and the adjustment mode to the signal input unit 11 of the detection device 10, and The signal output from the signal output unit 12 is received. The remote adjustment device 20 shown in FIG. 1 is an example and is not limited to this, and is a device that can output a signal designating at least one of a detection mode, a confirmation mode, and an adjustment mode. I just need it. For example, it is composed of a switch and a programmable logic controller. Further, in the illustrated example, both the signal input unit 11 and the signal output unit 12 are configured to communicate with the remote adjustment device 20, but the present invention is not limited to this, and the signal input unit 11 and the signal output unit 12 are respectively It may be configured to communicate with different devices.

  In the first embodiment, the input signal given from the remote adjustment device 20 to the signal input unit 11 takes three values of H (High) / M (Medium) / L (Low), each of which is “detection mode”, There is a one-to-one correspondence with either “adjustment mode” or “confirmation mode”. Here, according to the input signal and mode correspondence table shown in FIG. 2, the detection mode is the case where the input signal is H value, the adjustment mode is the case where the input signal is M value, and the confirmation mode is the case where the input signal is L value. Therefore, the function switching unit 16 switches to the detection mode when the signal input unit 11 receives the H value, switches to the adjustment mode when receiving the M value, and switches to the confirmation mode when receiving the L value.

  In the detection mode, the function switching unit 16 instructs the detection unit 13 to execute the detection operation. The detection unit 13 acquires a detection signal corresponding to a physical quantity indicating a change in the detection target, corrects it with the internal parameter stored in the parameter storage unit 14, and detects the detection value (detection signal) from the signal output unit 12 to the outside. Output as. When this detection device 10 is, for example, a photoelectric sensor, the light projected from the light projecting unit to the detection target is received by the light receiving unit, and the detection unit 13 corrects the amount of received light with internal parameters such as gain and offset to output a signal The detection value is output from the unit 12 to the outside.

  In the adjustment mode, the function switching unit 16 instructs the parameter adjustment unit 15 to execute the adjustment operation. The parameter adjustment unit 15 performs a predetermined process to adjust the internal parameter, and updates the internal parameter stored in the parameter storage unit 14 to a new value. As the predetermined process for adjusting the internal parameter, an appropriate process corresponding to the type of the detection apparatus 10 may be used, and thus detailed description thereof is omitted here.

  In the confirmation mode, the function switching unit 16 acquires an internal parameter stored in the parameter storage unit 14 and outputs the internal parameter from the signal output unit 12 to the outside. When there are a plurality of types of internal parameters, the types of internal parameters to be externally output may be fixedly set in the function switching unit 16 in advance. Alternatively, after switching the confirmation mode, the function switching unit 16 may output each internal parameter in order in a time division manner. For example, if there are two types of internal parameters, gain and offset, and the function switching unit 16 is set to time-division output, the function switching unit 16 outputs the gain for n seconds after switching the confirmation mode, and the next n seconds Causes an offset to be output.

  As described above, according to the first embodiment, the detection device 10 includes the signal input unit 11 that receives a signal input from the outside, the signal output unit 12 that outputs a signal to the outside, and the detection signal corresponding to the state of the detection target. Are detected with the internal parameters stored in the parameter storage unit 14 and converted into detection values to be output from the signal output unit 12, the adjustment mode for adjusting the internal parameters, and the internal parameters stored in the parameter storage unit 14 Among the confirmation modes output from the signal output unit 12, the function switching unit 16 is configured to execute a mode according to the signal received by the signal input unit 11. For this reason, it is possible to output detection values and internal parameters from one signal output unit 12 without increasing the number of signal output units 12.

Embodiment 2. FIG.
The detection device 10 according to the second embodiment has the same configuration as that of the detection device 10 shown in FIG. 1 and will be described below with reference to FIG. In the first embodiment, the detection mode, the adjustment mode, and the confirmation mode are individually operated. In the second embodiment, the adjustment mode and the confirmation mode are simultaneously operated in parallel. The input signal given to the signal input unit 11 from the remote adjustment device 20 takes a binary value of H / L, and each corresponds one-to-one to either “detection mode” or “adjustment mode / confirmation mode”. . Here, according to the correspondence table of the input signal and mode shown in FIG. 3, the case where the input signal is the H value is the detection mode, and the case where the input signal is the L value is the adjustment mode / confirmation mode sequence. Therefore, the function switching unit 16 switches to the detection mode when the signal input unit 11 receives the H value, and switches to the adjustment mode / confirmation mode when receiving the L value.

In the case of the detection mode, since the operation is the same as that of the first embodiment, description thereof is omitted.
In the case of the adjustment mode / confirmation mode, the function switching unit 16 first gives an instruction to the parameter adjustment unit 15 to execute the adjustment mode in the same manner as in the first embodiment, and then execute the confirmation mode to execute a new after adjustment. The internal parameters are output from the signal output unit 12 to the outside. The internal parameter output method may output preset types of internal parameters, or may output a plurality of types of internal parameters in order in a time-sharing manner, as in the first embodiment. .

  As described above, according to the second embodiment, the function switching unit 16 causes the detection mode and the adjustment mode / confirmation mode sequence to be executed in accordance with the signal received by the signal output unit 12. Configured. For this reason, it is possible to output detection values and internal parameters from one signal output unit 12 without increasing the number of signal output units 12 as in the first embodiment.

Embodiment 3 FIG.
The detection device 10 according to the third embodiment has the same configuration as that of the detection device 10 shown in FIG. 1 and will be described below with reference to FIG. The input signal given to the signal input unit 11 from the remote adjustment device 20 takes a binary value of H / L, and further uses two types of input signal time: short (for example, less than 1 second) / long (for example, 1 second or more). To switch between “detection mode”, “adjustment mode”, and “confirmation mode”. Here, according to the input signal and mode correspondence table shown in FIG. 4, the detection mode is when the input signal is H value, the adjustment mode is when the L value is less than 1 second, and the confirmation mode is when the L value is 1 second or more. And Therefore, the function switching unit 16 measures the time for each value of the input signal received by the signal input unit 11, switches to the detection mode when receiving the H value, and adjusts when the H value is reached in less than 1 second after receiving the L value. Switch to the mode, and switch to the confirmation mode when it starts to receive the L value and exceeds 1 second. Note that the mode switching may be controlled by combining input signals with more complicated values.

  Since the detection mode, the adjustment mode, and the confirmation mode are the same operations as those in the first embodiment, description thereof is omitted. However, in the adjustment mode, it takes a predetermined time to adjust the internal parameters. Therefore, the function switching unit 16 completes the adjustment of the internal parameters even if the input signal becomes the L value after the H value of less than 1 second. Wait until you switch to detection mode. In addition, the internal parameter output method may output preset types of internal parameters, or may output a plurality of types of internal parameters in order in a time-sharing manner, as in the first embodiment. .

  As described above, according to the third embodiment, the function switching unit 16 causes one of the detection mode, the adjustment mode, and the confirmation mode to be executed according to the signal received by the signal input unit 11 and its length. It was configured as follows. For this reason, it is possible to output detection values and internal parameters from one signal output unit 12 without increasing the number of signal output units 12 as in the first embodiment.

Embodiment 4 FIG.
The detection device 10 according to the fourth embodiment has the same configuration as that of the detection device 10 shown in FIG. 1 and will be described below with reference to FIG. The “detection mode” and the “adjustment mode / confirmation mode” are switched depending on the presence or absence of an input signal supplied from the remote adjustment device 20 to the signal input unit 11. Here, according to the input signal and mode correspondence table shown in FIG. 5, a case where there is no input signal is a detection mode, and a case where there is an input signal is a sequence of adjustment mode and confirmation mode. Accordingly, the function switching unit 16 operates the detection mode in a normal state when there is no input signal, and switches to the adjustment mode / confirmation mode sequence when the signal input unit 11 receives the input signal.

  Since both the detection mode and the adjustment / confirmation mode are the same as those in the second embodiment, description thereof is omitted. However, in the adjustment mode / confirmation mode, the function switching unit 16 switches to the detection mode after outputting the adjusted internal parameters to the signal output unit 12. In addition, the internal parameter output method may output preset types of internal parameters, or may output a plurality of types of internal parameters in order in a time-sharing manner, as in the first embodiment. .

  As described above, according to the fourth embodiment, the function switching unit 16 causes the signal input unit 11 to execute the detection mode when there is no signal input, and when the signal input unit 11 has a signal input, the function switching unit 16 switches to the adjustment mode according to the signal. The confirmation mode sequence is configured to be executed. For this reason, it is possible to output detection values and internal parameters from one signal output unit 12 without increasing the number of signal output units 12 as in the first embodiment.

Embodiment 5 FIG.
The detection device 10 according to the fifth embodiment has the same configuration as that of the detection device 10 shown in FIG. 1 and will be described below with reference to FIG. There are two input signals provided from the remote adjustment device 20 to the signal input unit 11, which are a switching signal to “adjustment mode” and a switching signal to “confirmation mode”. Here, the mode is switched to each mode according to the input signal / mode correspondence table shown in FIG. Therefore, the function switching unit 16 operates the detection mode in the normal time when there is no input signal of either of the two systems, and switches to the adjustment mode when the signal input unit 11 receives the switching signal to the adjustment mode of the system 1, and When the switching signal to the confirmation mode is received, the mode is switched to the confirmation mode.

  Since the detection mode, the adjustment mode, and the confirmation mode are the same operations as those in the first embodiment, description thereof is omitted. In addition, the internal parameter output method may output preset types of internal parameters, or may output a plurality of types of internal parameters in order in a time-sharing manner, as in the first embodiment. . Further, the adjustment mode switching signal may be used for selecting the type of internal parameter.

  As described above, according to the fifth embodiment, the function switching unit 16 causes the signal input unit 11 to execute the detection mode when there is no signal input, and when the signal input unit 11 has a signal input, the adjustment mode and One of the confirmation modes is configured to be executed. For this reason, it is possible to output detection values and internal parameters from one signal output unit 12 without increasing the number of signal output units 12 as in the first embodiment.

Although the first to fifth embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the configuration of the above-described embodiment, and does not depart from the gist of the present invention. It goes without saying that changes in the design of the range are included in the present invention.
For example, in each of the above-described embodiments, the confirmation mode is described as simply outputting the internal parameters. However, the output in the confirmation mode and the one adjusted in the adjustment mode are not necessarily the same. . As an example, when a photoelectric sensor that determines the presence or absence of a detection target depending on whether or not the amount of received light exceeds a threshold value is used as the detection device 10, the amount of received light when there is no object to be detected in the adjustment mode While obtaining in advance in the adjustment mode, the user is allowed to input a ratio indicating how much the threshold value should be set with respect to the obtained amount of received light. In addition, when the confirmation mode is called, a value obtained by multiplying the previously received light amount by the input ratio may be output as a threshold value.
That is, what is output in the confirmation mode is not limited to a simple internal parameter, but may be a value (internal parameter information) obtained by adding a predetermined calculation using the internal parameter.

DESCRIPTION OF SYMBOLS 10 Detection apparatus 11 Signal input part 12 Signal output part 13 Detection part 14 Parameter storage part 15 Parameter adjustment part 16 Function switching part 20 Remote adjustment apparatus

Claims (5)

A signal input unit for receiving a signal input from the remote adjustment device ;
A signal output unit for outputting a signal to the remote adjustment device ;
Detects the state of the detection target, the detection mode to output from the signal output unit a detection signal according to the state of the detection target is corrected with internal parameters, adjusted with the ability change of state change or the device itself the detection target internal parameter information of the confirmation mode output from the signal output unit, to perform at least one or more modes in accordance with a signal the signal input unit is received about the adjustment mode, and the internal parameters for adjusting the internal parameters required A detection device comprising a function switching unit.   The detection device according to claim 1, wherein the function switching unit causes the detection mode or the sequence of the adjustment mode and the confirmation mode to be executed in accordance with a signal received by the signal input unit.   The function switching unit is configured to execute a detection mode when no signal is input to the signal input unit, and to execute either the adjustment mode or the confirmation mode according to the signal when the signal input unit has a signal input. The detection device according to claim 1.   The function switching unit causes the detection mode to be executed when no signal is input to the signal input unit, and causes the adjustment mode and the confirmation mode to be executed when there is a signal input to the signal input unit. Detection device.   The function switching unit causes at least one of a detection mode, an adjustment mode, and a confirmation mode to be executed according to the length of the signal received by the signal input unit. The detection device according to claim 1.

Images