JPS6186667A - Apparatus for diagnosis of circuit containing change-over apparatus - Google Patents

Abstract

PURPOSE:To enable the certain diagnosis of a change-over apparatus and the state of the circuit connected to said apparatus by directly monitoring the output of the change-over apparatus, by providing a diagnostic circuit for inputting the outputs of a plurality of bias applying circuits and the change-over apparatus to diagnose the circuit state. CONSTITUTION:Floating signals VinA-VinN are respectively inputted to bias applying circuits 31,...3N and the output signals VA, VA'...VN, VN' thereof are guided to a change- over apparatus 1 for performing change-over and selection operations on the basis of the change-over signal S of a contact change-over apparatus 5. Next, the signal changed over and selected by the apparatus 1 is inputted to a diagnostic circuit 4 to diagnose the state of the apparatus 1 and that of the circuit connected to the apparatus 1. The diagnostic result is inputted to a confirmation circuit 41 where a bias value is discriminated, and the state of the apparatus 1 and that of the circuit connected to the apparatus 1 are outputted to a display apparatus 43 through a confirmation on the basis of the result discriminated by the confirmation circuit 41. By this method, the output of the change-over apparatus 1 is directly monitored and the certain diagnosis of the state of the change-over apparatus 1 and that of the circuit connected to said apparatus 1 can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a diagnostic device for a circuit including a V) conversion device, and in particular, to detect biases of different values for errors in a plurality of input floating signals. Diagnosis of a circuit including a switching device, in which a signal to which this bias is applied is outputted via a switching device, and the output of the switching device is monitored to diagnose the state of the switching device and the circuit including the switching device. Regarding equipment.

<Prior Art> As a device that handles a plurality of floating signals that are this type of input, there is, for example, a detector mounted on a flying object. This detector receives retro-reflected waves from multiple detection signals emitted onto the sea, floats each of the received reflected waves, and sequentially inputs them to a switching device.The switching device sequentially switches the floating signals. It detects a target object (for example, a ship). When the target hull is detected (when the floating signal reaches the predetermined Shintan value), the switching device is fixed in that position and the status of the target hull is tracked and investigated. Figure 2 shows the conventional technology surrounding the switching device in such a device (conventional switching l!!!
This will be explained using a block diagram of a diagnostic device for a circuit including the device.

In Fig. 2, J3 is shown, 1 is a switching device which switches multiple contacts α, β, . ! ! There is a °C monitor circuit r that monitors the monitor voltage VTh using a contact α, which is one of the multiple contacts of the device 1.

Now, the input side of the contacts β...ω of the switching device 1 is connected to the contact point [1-ω].
multiple signals (here, voltage signals)
VlnA-VtnN is connected, and the switching signal S is connected to the switching device 11. : Assume that it is input. At this time, the contact α of the switching device 1 is configured to repeatedly turn off 1% (on and Δ according to MgS), and the contacts β, ... ω of the switching device 1 are configured to repeatedly turn on and Δ according to the switching signal S. For example, if the configuration is such that the switches are sequentially switched from one to the other by a mechanism or the like, an on/off signal of the monitor voltage Vm corresponding to the switching 1@S is input to the monitor circuit 2, and the contacts β, . . .・On the output side of ω, there is a voltage V which is the selected signal. ut is obtained.

With this configuration, the operation of the switching device 1 can be checked by the monitor circuit 2, and the selected output from the switching device 1 is 1 g.
It is possible to indirectly know what is happening.

<Problems to be solved by optical devices> By the way, a diagnostic device for a circuit that includes a switching device with such a configuration is to Since the operation is checked indirectly, it is not possible to accurately determine whether the contact to which the signal is connected is actually normal (i.e., if the contact has become defective due to sparks, etc., and is constantly in contact). Even if a situation occurs, it cannot be detected). Furthermore, it is difficult to accurately check the state of the entire circuit including the signals connected to the switching device 1 (in the case of FIG. 2, it is only determined). There is a problem.

Means for Solving the Problems> (Objective of the Invention) The present invention has been made in view of the above problems, and includes:
With a simple configuration, the output of the switching device can be directly monitored, and the switching device and this switch 19! Diagnosis of circuits including switching devices that can reliably diagnose the status of circuits connected to devices! 7i device.

(Structure and operation) In order to achieve the above-mentioned object, a circuit diagnostic device including a switching device of the present invention is configured as follows.

The small number of signals g that have been set are respectively input to a plurality of bias application circuits, and a bias value of a certain value is applied thereto. When this bias is applied, the L-1-T Ing Shinyumi are switched respectively! Input in position A, switch/select, and output. The output of this switching device is also sent to the L diagnostic circuit>
9. The diagnostic circuit diagnoses the state of the ζ switching device and the circuits connected to this switching device every 5.4 days at this input (1; daytime).

In addition, among the configurations of the mouth, 1h has [multiple bias application circuits I]
are configured to set different bias amounts at the midpoints of the floating signals in order to apply bias to the input floating signals. Also, "diagnostic circuit"
The device is configured to identify the amount of bias applied to the bias application circuit r, and use the results of this identification to recognize and diagnose the state of the switching device and the circuits connected to this switching device.

<Embodiment> Hereinafter, the present invention will be described in detail using a block diagram showing a diagnostic device for a circuit including a switching device of the present invention shown in FIG. 1, which is a specific embodiment. In FIG. 1, important parts as in FIG. 2 are given the same reference numerals, and the explanation thereof will be omitted.

In FIG. 1, 31. ...3N is a plurality of floating signals (voltage signals) Vin A-Vt n N
are a plurality of bias application circuits each having an input.

These plurality of bias application circuits 31. ...3N is a potential EA-EN (however, EA A series circuit of resistors R connected with 70-tings (: bow V, nA・
The configuration is connected to both ends of ~v1nN. These plurality of bias application circuits 31. ...3N output signal (Va, VA)* = (VN, VN>ti&,
A switching signal S from a contact switching device 5 leads to a switching device 1 that performs switching and selection operations. Reference numeral 4 denotes a diagnostic circuit which inputs the output signal operated/selected by the switching device 1 and diagnoses the state of the switching device 1 and the circuits connected to the switching device 1. This diagnostic circuit 4 receives the input output bias value [A-
- Recognizes the state of the switching device 1 and the circuits connected to this switching device 1 based on the identification circuit 41 (consisting of, for example, a Kajin circuit) that identifies [N] and the results identified by this identification circuit 41 Comparison voltage 2EA-,...2EN- (However, (
EA>EA'),...(EN>EN-), and EA'>...>[EN'') are connected to the comparators Q+,...On and the output circuit 42a. a recognition circuit 42 configured to be executed with a hardware configuration of;
and a display device 43 that displays the output of this recognition circuit 42.

・'Operation of the example> The operation shown in FIG. 1 will be explained in more detail below.

A plurality of bias application circuits 31. ...3N is a bias li to the input 70-biting signal V+nA-VtnN.
Q EA ”-EN is applied and output as an output signal. In the bias application circuit 31, VA = (Vt n A /2) + EAVA =
-(VinA/2>+EA...-(1)N m
In the bias application circuit 3N of ['', VN-InN/2
>+EN VN --(Vin N/2) To E
It becomes N-(2). Furthermore, this (1), (
Equation 2) is considered as an instantaneous value of voltage, and can be applied to direct current and alternating current.

By the way, when dealing with the effective value of alternating current, it is sufficient to define 10 as in-phase and - as anti-phase. If the output signal switched and selected by the switching device 1 is the output of the bias application circuit 31, the output signal gV is output to the outside. ut is Vo ut =V
t-Vi=VinA-(3). =
On the other hand, the value of 11V in the identification circuit 41 is Vi +Vt
−2Ei −(4). This value is twice the bias ffi E 1. The 1=bias value (2Ei) identified by this identification circuit 41 is led to a recognition circuit 42 and applied to each comparator Ql.

...Qn, each comparison voltage 2EEA-, ...2E
N - and as a result from the comparator Q1 the switching device 1
A recognition output indicating that the contact α has been selected is output to the display 43 via the output circuit 42a.

Application Examples> The present invention is not limited to the block diagram shown in FIG. Application examples are shown below.

(2): In the configuration shown in FIG. 1, when an abnormal situation occurs, the display on the display device 43 disappears entirely. In order to avoid this, (i): the display device 43 or the output circuit 42a is provided with a function that displays an abnormality when all input signals are lost, and (li): the contact switching device 5 is provided with a display section. , Check the contact part of the replacement neck 1 if there is a malfunction on this display (in this case,
Since the display of the contact switching device 5 and the display device 43 can be compared at all times, the normality or abnormality of the contacts of the switching device 1 and the lines connected to these contacts can be checked at all times. , an abnormality detection circuit (the diagram is omitted, for example, a circuit means configured to detect that no signal is output from the comparator Q+,... 3, the switching device 1 is sequentially switched without emergency operation of the contact switching device 5 as shown by the broken line, and the comparator Q+, based on the switching result, is
It is conceivable to monitor the output signal from Qn, detect the part where there is no output (No. (It is also possible to discover failures by switching over them.)

Which method to use may be determined depending on the performance of the device, etc.

(2): In the diagnostic circuit 4, the display device 43 (and 6) may be built into the recognition circuit 42.

■: In the diagnostic circuit 4, the identification circuit 41 is not limited to an addition circuit, but may be configured with an adder/subtractor (in this way, for example, the bias voltage EA itself can be taken out as an output), etc. , essentially the bias application circuit 31. ...Bias applied at 3N ff) [EA
, . . . EN is identified by the identification circuit 41, and based on the result of this identification, the recognition circuit 42 may recognize the 01 operation state of the switching device 1.

■: In the diagnostic circuit 4, the recognition circuit 42 is configured with hardware, but it is possible to configure the IM with software using CI) U.
You can also let it happen. If the software (γ4) is configured, the configuration will be such that when an abnormality occurs and no abnormality is found in the contacts of the switching device 1 after checking the contacts, the circuit etc. connected to the switching device 1 will be checked. It can also be easily realized.

φ): Before connecting the diagnostic circuit 4 on the output signal line, connect the operational Q circuit 7 with the gain and time constant indicated by the two-dot chain line. It becomes possible to perform a diagnosis using the system diagnostic circuit 4. ,l! :
l, in this case only the gain of the performance is the output of the discrimination circuit 41 (
It affects the primary relationship of the bias vessel (゛, identification circuit 4
1 (Yo, we need to build a circuit to remove this.

φ)2 The present invention is not limited to use in detectors etc. carried on aircraft, but can be used in any suitable manner as long as it has a configuration in which the floating input 1Δ of the same type is disconnected and output via a tIA device. can be used.

■: Although the floating signal is a voltage signal r - the effect of the invention is that there is no functional difference even if a current signal is used. A plurality of bias application circuits that apply bias to each of the input signals, a switching device that inputs each of the bias application circuits and outputs them by switching/selecting with switching No. 18, and a switching device and switching device that inputs the output of the switching device. A diagnostic device for a circuit including a switching device of the present invention comprises a diagnostic circuit for diagnosing the state of a circuit connected to the device. The key to achieving this is to directly check the state of the situation, so if an emergency situation occurs, you will be able to discover it right away and take countermeasures.

■: Figure 1 (7) M initial output (VA, VA)
, -(VN.

When VN) is configured as (q), the monitor voltage is, in principle, only direct current, so the monitor circuit can be easily configured and the device can be manufactured at low cost.

(2): If the entire circuit configuration does not include, for example, the paralysis circuit 1 having a time constant, the input signal does not depend on direct current or alternating current, so the setup and manufacture are easy.

(2): Since the device is configured differentially, the circuit only needs to be configured to operate at 1/2 of the maximum input signal, and noise generated by the power supply etc. is not output to the outside.

There is an effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a diagnostic device for a circuit including a one-color switching device of the present invention, and FIG. 2 is a block diagram of a diagnostic device for a circuit including a conventional switching bag “j”. 1...Switching Device, 2... Monitor circuit, 31...
3N... multiple bias application circuits, 4... diagnostic circuit.

Claims (1)

[Claims] In a circuit diagnostic device including a switching device configured to output a plurality of floating signals via the switching device,
a plurality of bias application circuits into which the plurality of signals are respectively input, apply bias amounts of different values to the input signals and output them to the switching device; and bias amounts selected and output by the switching device are applied. input the signal that was
A diagnostic device for a circuit including a switching device, comprising a diagnostic circuit that recognizes the bias amount and diagnoses the switching device and the state of a circuit connected to the switching device.