JPH0828921B2 - Electric vehicle monitoring device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle having various control devices in an electric vehicle equipped with a protection means and a monitoring device. The present invention relates to an electric vehicle monitoring device capable of performing the function check. In vehicles such as electric vehicles, various control devices for drive systems and ATCs for operation systems are provided.
Various important electric devices such as (automatic train control) device are provided, and it is necessary that these always function normally. Therefore, in order to guarantee this, a monitoring device (hereinafter, referred to as a monitor device) has been mounted on a vehicle so that these devices can be constantly monitored and an abnormality can be quickly dealt with. This monitor device uses the above-mentioned various devices as monitored devices, takes in an input signal and an output signal from the monitored devices, and checks the functions of the monitored devices based on the correspondences between them, and normalizes them. Whether or not it is maintained is constantly determined, and the result is recorded or displayed. An example thereof will be described with reference to FIG. 5. In FIG. 5, 10a to 10c are input signal lines, 11a to 11c are output signal lines, 21 is a monitored device,
Reference numeral 31 is a monitor device, 32 is a monitor display device, and 333 is a monitor operation device. The monitored device 21 includes input signal lines 10a-10a.
Necessary operations such as logical judgment and calculation are performed based on the input signal supplied via c, and the result is output signal line 1
It is sent out as an output signal by 1a to 11c. If the monitored device 21 is a chopper device for driving control of a vehicle, what is supplied via the input signal lines 10a to 10c is a command signal from a driver's cab, a current of a motor main circuit, A detection signal from a sensor that represents a voltage, which is sent via the output signal lines 11a to 11c, is a signal for controlling the voltage and current for driving the motor. The monitor device 31 includes a microcomputer (microcomputer) or the like, and takes in the necessary input signal and output signal from each of the input signal lines 10a to 10c and the output signal lines 11a to 11c, and their corresponding relationship and input. The relationship between the output signal and the change in the signal is checked in advance for the data given as the case where the function of the monitored device 21 is normal, and the monitored device 21 is checked accordingly. Judge the monitoring result,
It is recorded or displayed on the monitor display 32. At this time, a monitor operation unit 33 is provided as needed, and the contents of the monitor operation and the like are selected and obtained by this. When a train is trained and includes a plurality of electric cars, a monitor device 31 is provided in each electric car as shown in FIG. The monitor 32 and the monitor operator 33 are configured to be installed on the driver's cab. In the example of FIG. 6, there is a plurality of monitored devices in one vehicle, which are 21A and 21B, respectively. According to such a monitor device, it is checked whether or not the function is normally maintained in a state where various monitored devices are actually used, and it is known even while the vehicle is in operation. Therefore, high reliability can be obtained. [0008] By the way, in many cases, various devices to be monitored by such a monitor device have various protection functions themselves. Therefore, it is desirable that the monitor of such a device is subjected to a function check including the above-mentioned protection function. However, such a protective function is naturally activated while the original function of the device itself is normal and the input signal to the device is normal. There is no such thing. Therefore, in the above conventional monitor device,
Unless abnormalities actually occur while the vehicle is operating, it is impossible to monitor whether the functions of the monitored device are normal, including its protection function. However, there is a drawback in that almost none of the parts can be checked, and the monitor as to whether or not the protection function is normal is insufficient and lacks reliability. The object of the present invention is to monitor not only the original function of the monitored device itself in the electric vehicle but also all the functions including the protection function, except the above-mentioned drawbacks of the prior art. It is an object of the present invention to provide a monitor device capable of always grasping all the functions of a monitored device accurately and maintaining a sufficient reliability to operate a vehicle. To achieve this object, the present invention inputs a predetermined simulated signal in place of or in addition to the original input signal to the monitored device, and inputs the simulated signal. Prompts the activation of the specified function of the monitored device,
The behavior of the monitored device at this time is detected from the state of the output signal so that the predetermined function can be checked. The simulated signal functions to cause the monitored device to generate a situation as if an abnormality had occurred. Therefore, as a result, it is possible to optionally check whether or not the protective function is in a state in which it can normally operate, if necessary. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric vehicle monitor device according to the present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 shows an embodiment of the present invention, in which 12a to 12c are simulated signal lines, 14 is a switching signal line, 41 is a simulated signal generating section, 42 is an arithmetic section, 43 is an input section, and 44 is a switch. Others are the same as the conventional example of FIG. The simulated signal generation unit 41 is controlled by the calculation unit 42, and may not appear in the input signal lines 10a to 10c in a normal vehicle operation state, but may appear only when an abnormality occurs, and
As a result, it functions to generate a simulation signal that prompts the activation of a function that requires a check, such as a protection function of the monitored device 21. The arithmetic unit 42 includes a microcomputer and the like, and serves to perform various arithmetic processes and control operations required for the monitor device 31. The input unit 43 functions to capture the signals appearing at the input terminal and the output terminal of the monitored device 21. The switch 44 operates according to the switching signal supplied from the arithmetic unit 42 via the signal line 14, and the input terminal of the monitored device 21 is changed from the input signal lines 10a to 10c to the simulated signal line 12.
It functions to switch to a to 12c. Next, the operation of this embodiment will be described. In a normal vehicle operation state, the contacts of the switch 44 are switched to the input signal lines 10a to 10c side, whereby the monitor device 31 inputs the input signal and the output signal of the monitored device 21 via the input unit 43. Is taken in, and the arithmetic processing is performed by the arithmetic unit 42 to check whether the correspondence between the input signal and the output signal matches the correspondence given in advance as the normal case of the monitored device 21. It is determined whether the function of the monitored device 21 is normal, and the result is displayed on the monitor display 32, recorded, or printed out to monitor. Therefore,
At this time, the same operation as in the case of the conventional example described in FIG. 5 is performed. On the other hand, when a predetermined state is reached, for example, when the vehicle is stopped or in a detained state, and the monitored device 21 does not require the original operation, the arithmetic unit is operated. A switch 42 generates a switching signal to switch the contacts of the switch 44 to the simulated signal lines 12a to 12c, and then operates the simulated signal generator 41 to input a predetermined simulated signal to the monitored device 21. Supply. In parallel with this, the output signal of the behavior of the monitored device 21 at this time matches the data given in advance as the normal response operation result of the monitored device 21 to the simulated signal at this time. The result is displayed on the monitor display unit 32 and recorded or printed out for monitoring. Therefore, at this time, the simulated signal generated by the simulated signal generator 41 is different from the input signal appearing on the input signal lines 10a to 10c in the normal state, and the protection function of the monitored device 21 and others, The signal is not activated in a normal operating state, and is in a signal form necessary for activating an indispensable function in the event of an abnormality, and the monitored device 21 corresponds to each of the simulated signals.
If the state of the output signal when the device responds in a normal state is stored in the calculation unit 42 in advance, all the functions of the monitored device 21 can be monitored. At this time, the switching from the monitor operation by the input signal to the monitor operation by the simulated signal must be performed when the monitored device 21 is in the idle state as described above, but this determination is made by the vehicle. It may be performed by a driver or the like to issue an instruction from the monitor operation device 33, or the monitor device 31 may be configured to automatically perform the operation of the monitored device 21 and the state of the vehicle. Good. Therefore, according to the embodiment shown in FIG. 1, not only the monitor of the original function of the monitored device 21 but also various protection functions, fail-safe functions and backup functions which are not activated in the normal vehicle operation state are carried out. As described above, it is possible to enable monitoring of all the functions of the device as necessary, and to give the vehicle high reliability. By the way, in the above embodiment, the output terminal of the monitored device 21 is directly connected to the output signal lines 11a to 11c. Therefore, at the time of monitoring by the simulated signal, the simulated signal is inputted, Signals that do not appear in the normal operating state are output signal lines 11a-1.
In some cases, the output of the monitored device 21 may adversely affect other external devices to which the output of the monitored device 21 is supplied. Therefore, an embodiment of the present invention suitable for such a case is shown in FIG. In this embodiment, as is apparent from FIG. 2, output signal lines 11a to 1 from the monitored device 21 are output.
1c is also provided with a switching device 45, which is controlled by the arithmetic unit 42 via the signal line 15 to switch the switching device 44 to the input signal lines 10a to 10a.
When switching from 10c to the simulated signal lines 12a to 12c, the switch 45 is also operated to open its normally closed contact. Others are the same as in the embodiment of FIG. . Therefore, according to this embodiment, since the output signal lines 11a to 11c are disconnected from the output terminal of the monitored device 21 during monitoring by the simulated signal, what kind of signal appears at this output terminal. Even if it does, there is no possibility that the external device will be adversely affected. Next, all of the above embodiments are low level signal devices including a microcomputer, etc., in which the signal levels of the input signal lines 10a to 10c and the output signal lines 11a to 11c for the monitored device 21 are relatively low. The system in which an input signal and an output signal can be directly captured by a monitor device 31 has been described. However, there are various kinds of monitored devices 21, and among them, there are devices that handle high voltage and large current input and output signals, such as a main circuit device of a vehicle driving motor. In such a case, the input signal and the output signal of the monitored device 21 are directly input as in the above embodiment.
Incorporation into the monitor device 31 is practically impossible. FIG. 3 shows an embodiment of the present invention suitable for such a case. In this embodiment, as is clear from FIG. 3, the monitored device 21 receives the input of the main control unit 22 from the main control unit 22 composed of an electronic circuit and the relatively high level signals of the input signal lines 10a to 10c. A conversion unit 46 that converts the signal to a relatively low level, and a conversion unit 47 that converts the relatively low level output signal of the main control unit 22 to a relatively high level signal of the output signal lines 11a to 11c. In this case, all the connections from the monitor device 31 are corresponding to these converters 46 and 47 and the main controller 22.
Between the other steps, and the other points are the same as in the embodiment of FIG. Therefore, according to this embodiment, even if the signal levels of the input signal lines 10a to 10c and the output signal lines 11a to 11c are considerably high, the monitor device 31 receives the input signal directly from the monitored equipment 21 regardless of the signal levels. The output signal can be captured, and the simulated signal can be directly supplied, so that the configuration can be simplified. According to the embodiment of FIG. 3, the monitoring target of the monitor device 31 is limited to the main control unit 22 in the monitored device 21, but in view of the complexity of the function, etc. However, it can be considered that the portion that actually needs the monitor is almost only the main control unit 22, and therefore, even in this embodiment, there is almost no fear that the monitor effect is diminished. Next, FIG. 4 shows still another embodiment of the present invention, which can be said to be a modification of the embodiment of FIG. 2, and instead of providing the switch 45 of FIG. Equipment 2
The switch 51 is provided in the external device 50 using the output signal of No. 1, and if there is a possibility that these devices 50 are adversely affected during monitoring by the simulated signal, the switch 51 should be opened. It is the one. Further, in this embodiment, an adder 48 is used in place of the switch 44 in the embodiment of FIGS. 1 and 2, and a simulated signal is input by this, which is for the following reason. by. That is, in many of the devices to be the monitored device 21, the original functions thereof are in a suspended state when the input signal lines 10a to 10c are in a non-signal state, and therefore, at this time, a simulated signal is transmitted. Even if the signal is directly applied to the input signal lines 10a to 10c, there is no possibility of causing a problem. Therefore, the simulated signal is simply added without using the switch. Although the present invention has been described in the above embodiments in comparison with the conventional example shown in FIG. 5, it is needless to say that the present invention can be applied to the train set shown in FIG. As described above, according to the present invention,
In addition to the monitor while the electric vehicle is operating normally, it is also possible to monitor the functions that do not activate under normal conditions, such as protection functions, so the on-board device status is always ensured, except for the drawbacks of the conventional technology. It is possible to easily provide an electric vehicle monitor device capable of grasping the above and providing high reliability to the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a monitoring device according to the present invention. FIG. 2 is a block diagram showing another embodiment of the present invention. FIG. 3 is a block diagram showing another embodiment of the present invention. FIG. 4 is a block diagram showing another embodiment of the present invention. FIG. 5 is a block diagram showing a conventional example of a monitoring device. FIG. 6 is a block diagram showing another conventional example. [Explanation of Codes] 10a to 10c Input signal lines 11a to 11c Output signal lines 12a to 12c Simulated signal line 21 Monitored device 22 Main control unit 31 Monitor device 32 Monitor display device 33 Monitor operation device 34 Transmission path 41 Simulated signal generation unit 42 arithmetic unit 43 input unit 44, 45 switching unit 46, 47 conversion unit 48 adder

Claims (1)

[Claims] 1. Monitoring device for monitoring the input signal and the output signal of the control device, which is provided with protection means for operating various control devices in the electric vehicle when detecting an abnormality in the control device itself or an input signal to them In a monitoring device for an electric vehicle comprising: a monitoring device, a simulation signal generating means for generating a simulation signal for activating the protection function by the protection means, and the output signal of the control device is taken in to check the protection function. And a function check means for carrying out the above, and an input side switching means for switching the input signal line of the control device and an output side switching means for switching the output signal line are provided, and the simulated signal is switched by switching the input side switching means. It is input to the control device, and the output of the control device is disconnected from the output signal line by the output side switching means. Electrical vehicles monitoring apparatus characterized by being configured to perform a check by means.