JPS60160305A - Cam shaft stopping position inspecting device - Google Patents

Abstract

PURPOSE:To accurately measure a cam shaft stopping position without contact by providing means for judging whether the stopping position is normal or not by noncontact type cam shaft stopping position detecting means and data processing. CONSTITUTION:An expecting stop position index ring 2 having an expecting stopping position indicator 3 for indicating a reference position on the cam shaft of a cam shaft controller is provided, and a CCD image sensor 4 for detecting the expecting stopping position indicator 3 is provided. When a signal 12 rises after a start signal 14 is inputted, a counter 93 starts counting a pulse applied through a signal line 11. Latch circuits 91, 92 latch the starting and finishing counted values of the indicator 3. A circulating memory 90 inputs data of the latch circuits 91, 92 and a cam shaft controller. It decides whether the cam shaft stopping position is normal or not on the basis of the data.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a camshaft type control device for a railway vehicle, in particular when measuring the position where the camshaft has stopped, the camshaft is Measure the distance from the expected stop position display of the indicator ring built into the camshaft, convert it into an angle, use it as the measured value of the stop position, and compare it with the standard value to check whether the camshaft stop position is normal. The present invention relates to a device for obtaining the information.

[Technical backstory of the invention and its problems] Conventionally, as one method for measuring the camshaft stop position in a camshaft type control device for a railway vehicle, as shown in FIG. An index 10 is created which is converted into an angle from the diameter of the expected stop position index ring 2 incorporated in the index ring 2, and is pasted on the reference stop position index 1.When the index ring 2 is stopped at the end of each inspection, the index ring 2 is rotated in the direction of rotation. There is a method that visually measures the deviation angle from the expected stop position display 3 given at regular intervals. Another method is to attach a flexible element 6 of a magnetic index stick to a suitable location on the camshaft as shown in the figure. On the other hand, a pickup 7 that picks up pulses by rotating the camshaft
Install. Furthermore, the controller 8 has a function of outputting φ to the display 9 at the measurement start point, and displaying Cll1a× by multiplying the number of pulses divided by the pickup 7 after one rotation by a converted value. There are ways to measure angles using a combination of these.

However, in the former method, data must be entered manually using a keyboard in order to automate the measurement, and the measuring staff must be present at the device, and in the latter method, a magnetic index must be attached. There are problems such as being subject to the above restrictions.

[Purpose of the Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a non-contact and highly accurate mounting method without requiring the measurement personnel to be present and without being subject to the above restrictions. An object of the present invention is to provide a camshaft stop position inspection device capable of measuring a camshaft stop position.

[Embodiments of the invention] An embodiment of the present invention shown in the drawings will be described below.

FIG. 2 shows an example of the configuration of a camshaft stop position inspection device according to the present invention. In the figure, reference numeral 5 denotes a camera, which has a sensor cell image sensor (hereinafter referred to as COD image sensor) 4 that captures an image of an expected stop position indicator ring 2 built into the camshaft of the camshaft control device to be inspected. . On the other hand, 100 is a controller, which is installed in the camera 5.
A circular type that sends necessary control signals to the OD image sensor 4 via signal lines 11 and 12, processes the output signal from the sensor 4 sent via the signal line 13, and stores the data for a certain period of time. It has a memory 90. Further, a data bus DB and an address bus AB are provided so that the data stored in the cyclic memory 90 can be provided to an external computer.

In the controller 100, the flip-flop circuit 51
．． 52; 53, 54.55 (51 to 53 are R-8,
54 and 55 (J-K) are those whose output can be made unnecessary or changed depending on the input conditions. The latch circuits 91 and 92 have a function of holding the data before disconnection at the output when the output is disconnected from the input by a control input signal. In addition, line receivers 81.82.
83.84.85 has a switch-like function, and can make the input side and the output side conductive or high impedance by a control input signal.

On the other hand, signals from each sensor element of the COD image sensor 4 are picked up from the initial startup. When the signal line 14 is set to high level, the counter 2. Cancel reset.

Flip-flop circuit 54.5 for latch circuit control signal
5 has a variable input condition. Further, when the condition is satisfied as the COD image sensor decimation start signal is output from the frequency divider 97 at IC2 via the flip-flop circuit 52 from ICt, the counter 93 counts the pulses of the oscillator 95 and makes a cheerful sound. Data is output to the data bus DB and sent to latch circuits 91 and 92. Further, when a change occurs in the signal level of the sensor cell of the COD image sensor 4, the flip-flop circuit 54 or 55 changes the output accordingly according to the level "1" → "0" or O" → "1". , the output of latch circuit 91 or 92 is separated from the input, and the data before change is transferred to latch circuit 91 . Latch circuit 92 stores the data. Furthermore, counter 9
Step 3 is a step of clearing and stopping the counter 93 with a signal issued when enough pulses are counted to sweep all the sensor cells of the COD image sensor 4, and starting the counter 94 and loading the data into the circular memory 90. Move to.

Next, reference numeral 98 is a memory control circuit, which stops writing to the memory when - times of data has been fetched. Further, the output of the counter 94 is sent to the decoder 74.
75, the line receiver 81 or 83 is turned on and the latch circuit 91 is connected to the data bus DB.
Or 92 data appear. The address for inputting the data appearing on the data bus DB into the circular memory is supported from the line receiver 85. The write timing is received from the memory control circuit 98 and performed. When the -th data has been taken in, the output of the memory control circuit 98 disables writing to the circular memory 90, and the process moves on to the second and subsequent data measurements and storage. The second and subsequent data measurements and storage are performed by inputting a measurement start signal to the decoder 71 and sequentially loading the data into the circular memory 90 through the steps described above.

Further, reading data from the cyclic memory 90 can be performed by connecting the external address bus AB to the line receiver 86 and the data bus DB to the line receiver 82, respectively.
It can be read at any time by an external computer.

Next, the operation of such a device will be explained. In FIG. 2, a COD image sensor 4 having n sensor cells is connected to an expected stop position indicator ring 2 attached to a camshaft.
When the image of
The output signal of the sensor cell of the image sensor 4 is at a high level, and if the area other than the expected stop position display 3 is set to have a small light reflection coefficient, the output signal of the sensor cell of the COD image sensor 4 corresponding to it becomes a low level. The comparator is processed by the interface within the camera 5.

Now, a case will be described in which the COD image sensor 4 is used to measure the amount and direction of deviation between the expected stop position indicator 3 and the reference stop position index 1 when the camshaft control device stops according to the control order. First, when the controller 100 is powered on, the flip-flop circuits 51, 52, and 53 are reset. Also, the oscillator 95 starts operating and C
A signal for picking up the signal of the sensor cell element of the OD image sensor 4 is sent out through the signal line 11. On the other hand, the counter 93 is in a reset state and a disabled state and is not counted up. The frequency divider 97 obtains one pulse signal with a value n1 larger than the number n of sensor cells in terms of the number of pulses of the signal applied via the signal line 11, n
This is a signal that sweeps the area once, and is sent out via the signal line 12. In addition, the flip-flop circuit 54.5
5 has been reset.

In this state, when the signal 14 is applied to the 7 flip-flop circuit 51 as a starting operation, a pulse is output to the one-shot circuit 61, one of the conditions of IC1 is satisfied, and the flip-flop circuit 52 is inverted, thereby resetting the counter 93. Release the condition. Thereafter, when the signal 12 rises, the condition of IC2 is established, and the counter 93 is enabled and starts counting the pulses applied via the signal line 11. Also, since the signal line 13 picks up the sensor cell signal on the signal line 11, it rises at the beginning of the expected stop position display 3, and this signal inverts the 7-rip, 70-tub circuit 55 and connects it to the counter 93. The latch circuit 91 that is taking the pulse stops taking in the pulse and holds the value. Thereafter, the signal on the signal line 13 falls at the end of the image of the expected stop position display 3, so the flip-flop circuit 55 inverts the signal, stops the latch circuit 92 from receiving the signal, and holds its value. Then, the count of the counter 93 progresses, but the output level is inverted when the count is greater than the aforementioned number n and smaller than nt. Then, the output signal 1 of the counter 93
5 satisfies one condition of IC3 via the one-shot circuit 63, resets the flip-flop circuit 52, resets the counter 92, and prepares for the next measurement. on the other hand,
The output of the one-shot circuit 52 is the flip-flop circuit 5
3 is inverted, the memory control counter 94 is enabled, and the data of the latch circuits 91 and 92 and the data from the camshaft control device are processed by the decoder 72 and entered into the circular memory 90. Further, the input/output impedances of the line receivers 82 and 86 are at high impedance, and the input/output impedances of the line receiver 85 are at low impedance, so that the input/output is turned on and is in an internal signal processing mode.

Next, when the condition of the decoder 74 is satisfied, the line receiver 81
turns on, and the data of the 10- latch circuit 91 is taken into the cyclic memory 90. Then, when the condition of the decoder 75 is satisfied, the line receiver 83
turns on, and the data in the latch circuit 92 is similarly taken into the cyclic memory 90. Similarly, decoder 76
When the condition is satisfied, the line receiver 84 is turned on,
Import the data of the camshaft control device. In this way, the data acquisition for -times is completed.

Thereafter, the counter 94 continues counting, and the cyclic memory 90
The output 16 of the decoder 73 that satisfies the condition with an integer close to the value obtained by dividing all addresses of
One of the conditions of C4 is satisfied, and the flip-flop circuit 53
is reset to set the counter 94 to Disney.

Further, the signal 16 is passed through a one-shot circuit 65 to I
When one of the conditions of Cs is satisfied, the flip-flop circuits 54 and 55 controlling the latch circuits 91 and 92 are reset to prepare for the next measurement.

The next measurements will be started one after another under the other condition of IC1. That is, the read command signal is provided with a decoder 71 that creates a condition for a read command from the camshaft, and when the condition is satisfied and a command is issued, it passes through the one-shot circuit 52 to satisfy one of the conditions of the ICI and is sent to the flip-flop circuit 52. is reversed, and the second data measurement and transfer to memory proceed in the same order as described above.

From the third time onwards, data is transferred one after another to the circular memory 90 when the condition of the decoder 71 is satisfied until the activation signal 14 is switched to the stop side. Note that if the condition of the decoder 71 is linked with the output of failure detection of the camshaft control device, the rewriting of the memory will not proceed and the circular memory 90 will be rewritten later.
By referencing the input pulse value and the data of the camshaft control I device when issuing the read command with the content written via the decoder 72, it can be effectively used for data analysis.

Next, using the timing chart of FIG. 3, a description will be given of how the pulses captured by the above method are treated as measured values.

Now, the COD image sensor 4 is detecting the expected stop position indicator ring 2.
When taking an image as shown in FIG. 3, at the same time as counting pulses on the signal line 11 starts from the sweep start signal on the signal line 12, the sensor signal changes from the black level to the white level on the expected stop position indicator ring 2. The pulse count value P1 of the pulse corresponding to the cell number is held in the latch circuit 91 shown in FIG. Further, the pulse count value P2 of the pulse corresponding to the sensor cell number that changed from the white level to the black level is held in the latch circuit 92 of FIG. Then, when the center of the white level is aligned with the reference stop position index 1, the pulse count value corresponding to Pl is ps 1, and that corresponding to P2 is P8.
2, and ps-(PS1+PS2)/2.

Next, when the center of the white level is moved by a known angle α from the reference stop position finger l111, the values are pcl and PC2 corresponding to Ps and P2, and pc = (PCt+P(iz
)/2. From this, the number of pulses pc-Ps is the angle α
will be converted into the unit of pulse number.

13- Perform the above content as calibration for measurement, and pil the values corresponding to Ps and P2 during measurement.

If it is imported as Pl2, pm = (PI11
1+P12)/2, the direction and amount β degrees of positional deviation at this time are β=a − (Pi − Ps )/(Pc − Ps )
It is measured by converting it into an angle using the formula.

In the above, when the device is started with a condition signal for repeatedly reading data being input to the decoder 71 and condition reference data being input to the decoder 72, the data is sequentially stored in the circular memory 90 while the vehicle is running. When the cyclic memory 90 is completely filled with data, the previous data is erased and replaced with new data. Furthermore, by inputting a signal to the decoder 71 to stop memory writing in the event of a failure, writing and rewriting of data will be stopped at the time of failure. By connecting to the receiver 82, it is possible to read the data stored in the circular memory 90 regarding the expected stop 14-position of the camshaft and the condition reference data at that time.

As mentioned above, this device is broadly divided into a non-contact type camshaft stop position measuring means that functions locally, and a means for determining whether or not the stop position is normal by data processing. If the former method is installed on a camshaft control device, it becomes possible to record data during operation, and by reproducing and reading the data in the event of a failure, a great effect can be obtained in troubleshooting.

In addition, since the angle and direction in which the camshaft stop position deviates from the expected stop position index 1 are stored in memory, even if the vehicle equipped with the camshaft control device is running, the conditions at the time of failure By stopping data storage at this point, reading the lag data after returning to the warehouse has a great effect in terms of troubleshooting, and since computer processing can be performed, there is no need for measurement personnel to be present all the time. Furthermore, since the camshaft stop position is measured in a non-contact manner using the COD image sensor 4, there is no need to attach a magnetic index as in the past. You can also get

By adding a signal that can read the name of the expected stop position to the display 3 of the expected stop position index ring 2, and optically processing the signal so that it can be read, two types of information can be obtained with one COD image sensor. It is also conceivable that the quantity, direction and name can be measured.

[Effects of the Invention] As explained above, according to the present invention, it is possible to accurately measure the camshaft stop position in a non-contact manner without requiring a measuring person to be present at all times and without having to impose restrictions on installation. A possible camshaft stop position inspection device can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for explaining the conventional method, FIG. 2 is a block diagram for explaining an embodiment of the present invention, and FIG. 3 is a timing chart diagram for explaining the measurement principle of the embodiment. 1... Reference stop position index, 2... Expected stop position indicator ring, 3... Expected stop position times display, 4... COD image sensor, 5... Camera, 6... Magnetic index ,7
... Magnetic pointing pickup, 8... Magnetic pointing controller, 11-13... Signal line, 100... Controller. Applicant's agent Patent attorney Shikihiko Suzushi 17- Figure 1

Claims (1)

[Claims] A COD image sensor that detects expected stop position indications placed at regular intervals in the rotational direction of the camshaft on the outer periphery of an expected stop position indicator ring built into the camshaft of a camshaft type control device for railway vehicles, and this sensor. camshaft stop position measuring means for measuring the distance of the detected expected stop position display with respect to a reference stop position index and converting this into an angle to obtain a measured value of the stop position; It comprises a memory for processing and storing the data for a certain period of time, and means for comparing the measured value by the measuring means with the contents of the memory to determine whether or not the camshaft stop position is normal. A camshaft stop position inspection device characterized by: