JPH07264460A - Device for diagnosing state of lens for television camera - Google Patents

Abstract

PURPOSE:To easily discriminate the timing of repair and adjustment by diagnosing non-defective, defective operating state and a degree of the defect of a moving section in the inside of a lens unit and displaying the diagnosed state. CONSTITUTION:A state diagnostic device section 11 is provided with a start signal generating section 31 generating a start signal used to command the start of diagnosis to part or all moving sections to be diagnosed by the operation of the operator, a diagnostic operation command section 33 sending a motor drive signal to a moving section based on the diagnosis start signal, a moving part operating state diagnostic section 35 receiving operating data from a sensor sensing the operating state of each moving section and diagnosing the operating state of each moving section based on the comparison between the operating data and reference data for diagnostic operation, and a diagnostic result display section 37 displaying defect, non-defect and a degree of the defect based on the diagnosis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera lens state diagnosing device for diagnosing the operating states of drive mechanisms and diaphragm mechanisms of various lenses for focus and zoom for television cameras, and displaying the results. For example, the present invention relates to a television camera lens state diagnosing device for an operator to inspect the operating states of various lenses of many television cameras in a television station or the like.

[0002]

2. Description of the Related Art In a television camera used in a television station or the like, a lens unit having various movable lenses such as focus and zoom and a movable mechanism such as an aperture mechanism is mounted on the front side of the camera.

Since the good or bad of the operating state of these movable parts immediately affects the image to be picked up, the operator inspects them so that the operating state of these movable parts is kept good.

However, since many television cameras are used in television stations and many moving parts are mounted on the lens unit of one television camera, the operator inspects these moving parts one by one. Is difficult.

In view of such circumstances, the applicant of the present application has developed and already disclosed a device for automatically diagnosing the operating state of each movable part of the lens unit (Japanese Patent Application No. 5-8964).
No. 0, Japanese Patent Application No. 5-109098, etc.).

This device performs a diagnostic operation on the movable part (for example, in the case of a zoom lens, the zoom lens is moved from the telephoto end to the wide end), and the speed, current value, etc. at each position therebetween are detected. Then, it is determined whether or not this detected value deviates from a predetermined reference value, and based on the result of this determination, a display to that effect is displayed.

By using this device, the labor of the operator for inspecting each movable part of the lens unit is greatly reduced, and the inspection time is also shortened. Also, especially in local TV stations, since an operator specializing in inspecting the lens unit is not always provided, general inspection staff often perform this inspection.In such a case, use the above device to inspect. It is possible to improve the reliability of.

[0008]

However, in a television camera lens, there are many cases in which it cannot be used even if the operating state of the movable portion in the lens unit is not completely satisfactory. For example, in a zoom lens, it is often not necessary to move the lens to the telephoto end or the wide-angle end depending on the shooting conditions, and the zoom range to be used varies depending on the cameraman's sensitivity.

Therefore, if the operating condition of the zoom lens is good in the zoom range used by the photographer in the shooting condition, the shooting is interrupted and repair is performed even if the zoom lens malfunctions outside the range. No need.

Further, even if the drive current value of the lens drive motor deviates from a predetermined reference value, there is a case in which there is no problem in use, and in this case also, it is not necessary to immediately perform repair.

The same applies to other movable parts in the lens unit such as the focus lens, the extender lens, and the diaphragm.

Therefore, when performing a state diagnosis for each movable part for a television camera, the operating state of
It is necessary to let the operator know not only the defect but also the extent of the defect.

The present invention has been made in view of such circumstances, and when diagnosing the operating state of a lens for a television camera, not only the operating state is good or bad, but in the case of being defective, the degree thereof is not good. It is an object of the present invention to provide a condition diagnosing device for a lens for a television camera, which allows an operator to easily know how much is, and the timing of repair or adjustment thereof can be easily diagnosed.

[0014]

According to the present invention, there is provided a television camera lens state diagnosing device for diagnosing an operating state of a movable part built in a lens unit of the television camera, wherein In response to a diagnosis start instruction signal for instructing the start of diagnosis of the movable part, the movable part is caused to perform a diagnostic operation, and based on the operation result, the good or bad operation state of the movable part and the degree of the defect are diagnosed. It is characterized in that it is configured so as to display the good or bad according to the diagnosis and the degree of the bad.

Further, the television camera lens state diagnosing device of the present invention is a television camera lens state diagnosing device for diagnosing an operation state of a movable part built in a lens unit of the television camera. A start signal generating section for generating a diagnostic start signal for instructing, and a diagnostic operation instruction section for instructing the movable section to perform a predetermined diagnostic operation according to the generated diagnostic start signal;
Based on the comparison between the operation data detected by the sensor that detects the operation of the movable part according to the instruction of the diagnostic operation instruction part and the reference data of the diagnostic operation, the operating state of the movable part is good or bad. And a movable part operation state diagnosis part for diagnosing the degree of the defect, and a diagnostic result display part for displaying the goodness, the defect and the degree of the defect by the diagnosis.

Further, it is possible to dispose the signal generator at a position of the lens unit that can be operated from the outside, and further dispose the diagnostic result display unit at a position of the lens unit that can be visually recognized from the outside. is there.

The term "from the outside" is meant to include the case where the window of the outer cover of the lens unit is passed through and the outer cover is removed.

Further, it is also possible to configure the diagnosis result display section with an LED showing whether the diagnosis result is good or bad and a plurality of LEDs showing the degree of the failure in a stepwise manner. is there.

[0019]

According to the television camera lens state diagnosing device of the present invention, not only the operating state of the movable part in the lens unit is good or bad, but also the degree of the defect is good. By diagnosing and displaying the diagnosis result, the operator can easily know not only the quality of the movable portion in the lens unit but also the degree of the failure by looking at this display.

That is, the operator can know the degree of the defect from this display, and whether or not the defect should be repaired depending on the photographing condition and the sensitivity of the photographer taking the photograph, It is possible to decide how long it should be done, whether repairs and adjustments should be performed at regular periodic inspections, and so on.

If the signal generating section is arranged at a position of the lens unit that can be operated from the outside, and the diagnosis result display section is arranged at a position of the lens unit that is visible from the outside, The operator can instruct the start of diagnosis of the operating state of each movable part at any timing at the position of the lens unit to be inspected, and can recognize the diagnosis result at this position.

Further, if the operator is made up of an LED that indicates whether the diagnosis result is good or bad and a plurality of LEDs that indicate the degree of failure when the diagnosis result is defective, the operator is The degree of the defect can be easily judged by the type or the number.

As a result of the diagnosis, the green LED is turned on if the result is good, the yellow LED is turned on if the bad condition is mild, and the red LED is turned on if the bad condition is severe. It is more preferable that the content of the diagnostic result can be identified by color display so that the diagnostic result can be easily seen.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

A lens unit equipped with a condition diagnosis device for a television camera lens according to an embodiment of the present invention is attached to a front portion of a camera body of the television camera, and the camera body is provided with a pan in a turning direction and a tilting direction. It is supported by a tiltable platform support.

Next, the lens unit 10 mounted on the camera body 100 will be described with reference to FIG. In FIG. 1, a state diagnosis device section 11 for diagnosing the operating state of each movable section in the lens unit 10 is a self-diagnosis interface board 21.
And the CPU board 23, and this CP
A zoom lens drive unit 12, a focus lens drive unit 13, an extender lens drive unit 14, an aperture (iris) drive unit 15, a correction lens drive unit 16, and a reference voltage detection unit for diagnosing the operating state of the U board 23. Each part of 17 and the current detection part 18 is electrically connected.

Each of the lens driving units 12, 13, 14, 16 and the diaphragm driving unit 15 includes an A / D conversion unit, an amplifier unit, a driving motor,
It has a potentiometer (or sensor) and a D / A converter, and each drives a motor according to a motor drive signal from the CPU of the CPU board 23, and a lens moved at a predetermined timing by this drive motor. The position of the diaphragm and the position (position and speed as necessary) are detected, and the detected data is sent to the CPU.

Further, the reference voltage detector 17 for detecting the reference voltage of the power source and the current detector 18 for detecting the output current from the power source have an A / D converter, and the detected reference voltage or output. The electric current is converted to a digital value and converted to C above.
It is sent to the PU.

The state diagnosis device section 11 is conceptually represented by a block diagram as shown in FIG. That is, the device section 11 is a start signal generation section for generating a diagnosis start signal for instructing the movable section to start diagnosis by designating a part or all of the movable section to be diagnosed by an operator's operation.
31, a diagnostic operation instruction section 33 that sends a motor drive signal to the designated movable section in response to the diagnosis start signal, and operation data from a sensor that detects the operating state of each movable section are input. Movable part operation state diagnosis part 35 for diagnosing the operation state of each movable part based on the comparison between the operation data and the reference data of the operation for diagnosis, and a diagnostic result display part for displaying the good or bad and the degree of the bad by this diagnosis. 37 and.

The start signal generating section 31 and the diagnosis result display section 37 are mounted on the self-diagnosis interface board 21 described above, and the diagnosis operation instruction section 33 and the movable section operation state diagnosis section 35 are the CPU described above. The software is configured by a program stored in the ROM of the board 23.

Further, when performing remote operation on the state diagnosis device section 11 from a remote position, as shown in FIG. 1, the operation unit (external controller; constituted by a personal computer) 41 is operated by an operator. In response to the diagnosis start signal sent to the CPU, a motor drive signal is sent from the diagnostic operation instructing section 33, and the diagnostic result from the movable section operating state diagnosing section 35 is sent to the operation unit 41. It is also possible to display the diagnosis result on the CRT 43 of the operation unit 41. In this case, the diagnosis results of the plurality of lens units 10 can be displayed on the CRT 43 at the same time or successively. This operation unit 41 and lens unit 10 are RS23
It is connected via a 2 C connector 45 and an RS232 C cable 47. Further, as shown in the broken line in FIG. 1, a part of the connection cable between the operation unit 41a and the lens unit 10 can be replaced with the modems 49a, b and the public telephone line 51. When the operation unit 41 is used in this way, the diagnostic movable part designation switch 31 and the diagnostic result display part 37 in FIG. 2 can be configured by the operation unit 41.

FIG. 3 is an external view showing an example of mounting the self-diagnosis interface board 21 of the state diagnosis device 11 on the lens unit 10. In addition, this FIG. 3 shows a lens unit.
It shows the state where the cover of 10 is removed.

In the mounting example of FIG. 3, the lens unit 10
The mother board 61 and the CPU board 23 are attached to the outer wall of the board by screwing in the vertical direction. The self-diagnosis interface board is attached to the connector 63 of the mother board 61.
21 connectors 65 are connected, and the connector 63 of the mother board 61 is electrically connected to a predetermined position of the lower CPU board 67.

In this way, the self-diagnosis interface board
21 is attachable to and detachable from the CPU board 23, so that the operator can use this board at the start of diagnosis.
21 can be attached to the lens unit 10 to be diagnosed and the diagnosis can be performed. In this case, the self-diagnosis interface board 21 need not be prepared for each lens unit 10.

Next, the main part of the above-mentioned self-diagnosis interface board 21 will be described with reference to FIG.

On this self-diagnosis interface board 21, a start button 73, a stop button 75, a select switch 77, a diagnostic level display section 79, a diagnostic item display section 81, a connector 65 for connecting to the connector board 61 described above, and the drawing. It is equipped with an LED driver or the like that is not installed.

The start button 73 is a switch for starting the diagnosis of the operating state of the movable part.
By pressing 73, the self-diagnosis start signal is sent to the CP
It is input to the CPU of the U board 23. When the CPU confirms that this signal has been input, it starts the processing of the self-diagnosis subroutine described later. On the other hand, the stop button 75 is a switch for stopping the diagnosis of the operating state of the movable part, and this button is pressed during the execution of the self-diagnosis subroutine.
When 75 is pressed, the CPU stops the processing of the self-diagnosis subroutine, exits this subroutine, and returns to the processing of the normal lens operation routine (main routine). Note that the start button 73 and the stop button 75 are colored green and the stop button 75 is colored red for easy distinction.

Next, the select switch 77 is a 4-bit, 16-contact switching DIP switch. When the switch 77 is set to each switch number, a designation signal corresponding to the switch number is sent to the CPU board 23. CPU
Then, the condition diagnosis device section 11 is set to have the following functions corresponding to the above.

Switch number 0 ............ Performs self-diagnosis of all movable parts and power supply 1 ............ Confirms voltage and current of reference power supply 2 ............ Switch operation Confirmation 3 ……………… Confirm the operation of the iris 4 ……………… Confirm the operation of the extender lens 5 ……………… Confirm the operation of the zoom lens 6 ……………… For the focus lens Check the operation 7 ……………… Check the operation of the correction lens 8 to F ………… Not used.

In this way, the movable part to be diagnosed changes according to the setting of the select switch 77, and the switch number is 0.
When the switch number is 1, all the movable parts and the power supply part are sequentially diagnosed.
Only one moving part or power supply part will be diagnosed.

Further, the diagnostic level display section 79 displays the quality of the operating state and the degree of the defective in color based on the diagnostic result of the CPU.
It consists of one yellow LED and three red LEDs. If the green LED is illuminated, the operating condition is normal, if the yellow LED is illuminated, it is usable but requires adjustment, and the red LED is illuminated. In some cases indicates that repair is required.

Regarding the yellow and red LEDs, the more LEDs are turned on, the more defective the operating state is.

The diagnostic item display section 81 is composed of two 7-segment LEDs. When the left digit has a number corresponding to the diagnostic item and the right digit has a diagnostic result indicating a defective condition, the diagnostic contents are displayed. The corresponding number is shown. The operator can recognize the diagnostic item and the details of the defect from the two-digit number displayed on the diagnostic item display section 81. The numbers corresponding to the above diagnostic items are defined in the same correspondence as the switch numbers of the select switch 77 corresponding to the above diagnostic items.
The numbers according to the contents of the above defects are 1 for the input signal generating circuit defect, 2 for the amplifier defect, 3 for the motor defect, and 4 for the mechanical part defect.
It is stipulated that For example, when 52 is displayed, it is recognized from the left digit 5 that the zoom lens portion is currently diagnosed, and from the right digit 2 that the amplifier section is defective.

When the diagnosis result is normal, 0 is displayed on the LED of the right digit.

Next, the lens unit 10 is attached to the CPU.
The main routine for operating the will be described with reference to the flowchart shown in FIG. As shown in FIG. 5, in this main routine, initial setting is first made (S1), and the basic operation of each movable part is processed based on an instruction from the camera side main body 100 (S2). During the processing of the basic operation, the focus lens, zoom lens, extender lens, etc. are moved to appropriate positions, the diaphragm correction operation associated with these lens movements, and the operation of sending the position data of these movable parts to the camera Etc. are included.

Next, the operation of the basic operation of the movable part (S2) is interrupted at every predetermined timing to determine whether or not the start button 73 of the self-diagnosis interface board 21 is pressed (S3) and An operation (S4) of determining whether or not a command signal for instructing self-diagnosis from the operation units 41 and 41a is input is performed.

If it is determined in step 3 (S3) that the start button 73 has been pressed, or if it is determined in step 4 (S4) that a command signal has been input, the self-diagnosis subroutine is executed (S5). ,
If not, the process returns to the process (S2) of the movable part basic operation.

Next, the self-diagnosis subroutine described above will be described with reference to FIG. This self-diagnosis sub-routine is a routine for judging the switch number set by the select switch 77 and diagnosing a predetermined movable part according to the judgment result.

That is, first, it is determined whether or not the select switch 77 of the self-diagnosis interface board 21 described above is set to 0 or 1 (S11). 0 is for instructing diagnosis of all movable parts and power supply parts.
Reference numeral 1 indicates the reference voltage of the power supply unit, and further, it instructs the diagnosis of the output current. Therefore, the above step 11 (S11)
If the result of the determination is YES, the reference voltage diagnosis subroutine is executed (S12). When the result of the determination in step 11 (S11) is NO, or when the execution of the reference voltage diagnosis subroutine is completed, the process proceeds to step 13 (S13). In this step 13 (S13), it is judged whether or not the select switch 77 is set to 0 or 2 (2 indicates switch-related diagnosis), and if the judgment result is YES, the switch-related After executing the diagnosis subroutine (S14), if NO, go directly to step 15 (S1
Go to 5).

Similarly, in step 15 (S15), it is determined whether or not the select switch 77 is set to 0 or 3 (3 indicates the diagnosis of the aperture (iris)). If the determination result is YES, the aperture diagnosis subroutine is executed (S16), and if NO, the process directly proceeds to step 17 (S17).

Next, in step 17 (S17), it is determined whether or not the select switch 77 is set to 0 or 4 (4 is an instruction to diagnose the extender lens), and the determination result is YES. If there is, the extender lens diagnosis subroutine is executed (S18), and if NO, the process directly proceeds to step 19 (S19).

Further, in step 19 (S19), it is determined whether the select switch 77 is set to 0 or 5 (5 indicates the diagnosis of the zoom lens), and the determination result is YES. For example, after executing the zoom lens diagnosis subroutine (S20), if NO, the process directly proceeds to step 21 (S21).

Next, in step 21 (S21), it is determined whether or not the select switch 77 is set to 0 or 6 (6 indicates the diagnosis of the focus lens), and the determination result is YES. If there is, the focus lens diagnosis subroutine is executed (S22), and if NO, the process directly proceeds to step 23 (S23).

Further, in step 23 (S23), it is judged whether or not the select switch 77 is set to 0 or 7 (7 is for instructing diagnosis of the correction lens), and if the judgment result is YES. For example, after executing the correction lens diagnosis subroutine (S24), if NO, the self-diagnosis subroutine is directly skipped and the process returns to the processing routine (S2) of the movable part basic operation of the main routine described above.

Therefore, when the switch number set by the select switch 77 is 0, the diagnosis for all of the above seven items is sequentially performed, and 1 to 7 are performed.
In this case, only one item corresponding to the set switch number will be diagnosed.

As described above, in the present embodiment, the selection switch 77 on the self-diagnosis interface board 21 is switched (or the operation unit 41, in order to select all the diagnosis items and further to select one desired diagnosis item). Signal input from 41a),
The operator can select and change the diagnostic item arbitrarily and easily.

Further, in addition to the diagnosis of all diagnostic items, only one desired diagnostic item can be diagnosed, and the operator can select only the individual diagnostic items according to the past failure frequency and the situation at that time. Since the diagnosis can be performed, it is possible to improve the efficiency of the state diagnosis of the movable part and the power supply part.

FIG. 7 is a flowchart showing the zoom lens diagnosis subroutine (S20) shown in the self-diagnosis subroutine of FIG.

In this zoom lens diagnosis subroutine, first, the current position information of the zoom lens is stored (S31), and this zoom lens is set to the TELE end and the WID.
It is moved to the center position which is the middle of the E end (S32).
In this way, by always setting the start position of the diagnosis to the center position, the stability of the diagnosis accuracy is ensured.

The position of the zoom lens is detected by the potentiometer described above while the zoom lens is moving and after the stop (S33), and it is determined whether the position is normal (S34). Position detection is performed, for example, at predetermined time intervals during the movement of the zoom lens described above and the movement of the zoom lens described later. Further, the above-mentioned determination and the determination to be described later are made by comparing the position data obtained by the potentiometer with the preset reference position data.

If the result of the determination in step S34 (S34) is normal, the process proceeds to the next step 35 (S35), and if it is defective, a predetermined flag is set and the process goes to the quality determination subroutine (S44).

In step 35 (S35), the zoom lens stopped at the center position is moved to the TELE end. At this time, the position is detected by the potentiometer described above during the movement of the zoom lens and after the stop (S36), and it is determined whether or not the position is normal (S37).

If the result of the determination in step 37 (S37) is normal, the process proceeds to the next step 38 (S38), and if it is defective, a predetermined flag is set and the process goes to the quality determination subroutine (S44).

Thereafter, the zoom lens is moved to the WIDE end (S38) and then to the TELE end again (S41), and during the movement and after the stop, the above-mentioned steps 33 and 36 (S33, S36). And step 3
Position detection (S39, S42) similar to 4, 37 (S34, S37)
And whether or not the position is normal (S40, S4
3) is performed, and if the result of this determination is normal, if it is defective, a predetermined flag is set and if it is defective, the flow proceeds to a quality determination subroutine (S44).

At each position of the zoom lens, the drive current value of the motor is also measured, and it is judged whether or not this current value is normal. If it is defective, a predetermined flag is set.

In the pass / fail judgment subroutine (S44), steps 34, 37, 40, 43 (S34, S37, S4) are executed.
0, S43), the flag set by the determination is detected, and based on the information based on the flag, it is determined whether the operating state of the zoom lens is normal or defective. If the zoom lens is defective, the degree of the defective state is determined. Judgment, and the diagnosis level display section of the self-diagnosis interface board 21 described above according to the judgment result
Turn on LED 79.

Further, the content of the defect is displayed in the right digit of the diagnostic item display portion 81 by the corresponding numeral.

After this, when the processing of the quality judgment subroutine (S44) is completed, the routine proceeds to step 45 (S45), where the zoom lens is at the position stored in step 31 (S31), that is, before entering this self-diagnosis subroutine. Is returned to the state of. As a result, after this, the self-diagnosis subroutine is skipped and the processing of the basic operation of the movable part of the main routine (S
When performing 2), it becomes easy to immediately shift to the processing.

FIG. 8 is a flow chart showing a part of the quality judgment subroutine shown in FIG.

In this quality judgment subroutine, in addition to the judgment and display of the contents of the defect, the judgment and display of the degree of defect described below are performed. That is, the above steps 34, 3
Based on various flags set by the judgment of 7, 40, 43 (S34, S37, S40, S43), each step 51, 53, 5
4, 57, 58, 59 (S51, S53, S54, S57, S58, S5
I am trying to judge 9).

That is, first, it is judged whether or not the zoom lens has moved (S51), and if NO, it means that there is a serious defect and a predetermined signal is issued to turn on the three red LEDs of the diagnostic level display section 79. It is sent to an LED driver (not shown) (S52). If YES, the process proceeds to step 53 (S53). Next, in step 53 (S53), it is determined whether or not the zoom lens has moved to a predetermined position. If the result of this determination is NO, then in step 54 (S54) it is determined whether or not there is a problem in use. It is determined (S54). If the result of the determination in step 54 (S54) is YES, it means that the failure is quite serious and a predetermined signal is sent to an LED driver (not shown) to turn on the two red LEDs of the diagnostic level display section 79 (S55). . On the other hand, if the result of the determination in step 54 (S54) is NO, it means that there is a slight defect and a predetermined signal is sent to an LED driver (not shown) to turn on one red LED of the diagnostic level display section 79 (S56). .

If the zoom lens has moved to the predetermined position and the result of the determination in step 53 (S53) is YES, then the process proceeds to step 57 (S57). This step 57 (S
In 57), it is determined whether or not the current value at each position during the movement of the lens and the stop position is higher than the reference value. If the result of the determination is YES, then the level of the current value is considerably high. Is determined (S58). If the result of the determination in step 58 (S58) is YES, a predetermined signal is sent to an LED driver (not shown) to turn on one red LED of the diagnostic level display section 79 (S56), and NO.
If so, the process proceeds to step 59 (S59).

In this step 59 (S59), it is judged whether or not the level of the current value is about an error. If the result of the judgment is NO, the yellow LED of the diagnostic level display section 79 is judged. Is sent to an LED driver (not shown) to turn on two LEDs (S60), and if YES, a predetermined signal is sent to an LED driver (not shown) to turn on one yellow LED of the diagnostic level indicator 79. (S
61).

Further, if the result of the determination in step 57 (S57) is NO, it means that the operating state of the zoom lens has been diagnosed as normal, and the green LED of the diagnostic level display section 79.
A predetermined signal is sent to an LED driver (not shown) to turn on (S62).

As described above, in the present embodiment, the color and the number of LEDs to be lit are changed according to the degree and content of the failure of the diagnosis result, so that the operator should immediately perform repair or adjustment, or It is possible to easily determine whether or not it should be carried out at regular periodic inspections.

When it is diagnosed that there is a serious defect content during the execution of the self-diagnosis subroutine, a message to that effect is displayed (for example, three red LEDs are turned on), and this self-diagnosis subroutine is executed. It is desirable to immediately stop the operation and wait for the repair by the operator.

Incidentally, in this self-diagnosis subroutine, the diagnosis subroutine (S12, S
Since 14, S16, S18, S22, S24) have substantially the same contents as this zoom lens diagnosis subroutine (S20), their description will be omitted.

The condition diagnosing device for a television camera lens according to the present invention is not limited to the above-mentioned embodiment, but can be modified into various other modes.

For example, in the above-described embodiment, the good, defective, and defective levels of the operating state are displayed by the color of the LEDs such as red, yellow, and green and the number of LEDs that are turned on. The mode of the diagnostic level display unit in the device is not limited to this, and the content of the diagnostic result may be displayed by the color or number of other LEDs, and, for example, the degree of failure is generally indicated by an audio device or the like. It is also possible to display with the FL meter etc. which are used on the front panel of, and to display with a number etc.

Note that the concept of display in the device of the present invention includes not only visual ones but also auditory ones. For example, the length of the buzzer sound, the number, etc. represent the above-mentioned goodness, failure, and degree of failure. However, in this case, the operator does not need to always look at the diagnostic result display unit.

In the above embodiment, the diagnostic items are selected by using the DIP type select switch 77, but various types of changeover switches can be used instead.

Further, in the above embodiment, the whole diagnostic item or one diagnostic item can be selected, but it is also possible to select a grouped predetermined diagnostic item. .

Further, the diagnostic items are not limited to those in the above-mentioned embodiment, and it is possible to diagnose the states of various other elements in the lens unit.

During the period in which the state of each part of the lens unit is being diagnosed, by interrupting the drive signal of the movable part from the camera body side, the fluctuation of the current value at the time of the diagnosis can be suppressed and the accuracy of the diagnosis can be improved. It is possible to ensure stability.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a condition diagnosis device for a television camera lens according to an embodiment of the present invention.

FIG. 2 is a block diagram conceptually showing the structure of a condition diagnostic device section shown in FIG.

FIG. 3 is an external view showing a state in which a condition diagnosis device section is attached to the lens unit shown in FIG.

FIG. 4 is a schematic diagram showing a main part of the self-diagnosis interface board shown in FIG.

5 is a flowchart for explaining the operation of the lens unit shown in FIG.

6 is a flowchart showing a self-diagnosis subroutine shown in FIG.

FIG. 7 is a flowchart showing a zoom lens diagnosis subroutine shown in FIG.

FIG. 8 is a flowchart showing a quality determination subroutine shown in FIG.

[Explanation of symbols]

 10 Lens unit 11 Condition diagnosis device section 12 Zoom lens drive section 13 Focus lens drive section 14 Extender lens drive section 15 Aperture (iris) drive section 16 Correction lens drive section 17 Reference voltage detection section 18 Current detection section 21 Self-diagnosis interface board 23 CPU board 31 Start signal generator 33 Diagnosis operation instruction section 35 Moving part operation status diagnosis section 37 Diagnostic result display section 41, 41a Operation unit 45, 63, 65 Connector 73 Start button 75 Stop button 77 Select switch 79 Diagnostic level display Part 81 Diagnostic item display

Claims (4)

[Claims] 1. A state diagnostic device for a television camera lens for diagnosing an operating state of a movable portion built in a lens unit of a television camera, wherein the movable portion is movable in response to a diagnosis start instruction signal for instructing the diagnosis of the movable portion. A diagnostic operation is performed on the parts, and based on the operation results, the good or bad of the operating state of the movable part and the degree of the bad are diagnosed, and the good or bad and the degree of the bad by the diagnosis are displayed. A condition diagnostic device for a lens for a television camera, which is configured. 2. A television camera lens state diagnostic device for diagnosing an operating state of a movable part built in a lens unit of a television camera, comprising: a start signal generator for generating a diagnostic start signal for instructing the start of the diagnosis. A diagnostic operation instruction section for instructing the movable section to perform a predetermined diagnostic operation in response to the generated diagnostic start signal; and the movable section according to the instruction of the diagnostic operation instruction section. Moving part operating state diagnosis section for diagnosing the operating state of the moving part, whether the operating state is good or not, and the degree of the failure based on a comparison between operation data detected by a sensor that detects the operation of And a diagnostic result display section for displaying a good result, a bad result, and a degree of the bad by the diagnosis. 3. The signal generating section is arranged at a position of the lens unit that can be operated from the outside, and the diagnostic result display section is arranged at a position of the lens unit that is visible from the outside. The condition diagnostic device for a lens for a television camera according to claim 1 or 2. 4. The diagnostic result display section is composed of an LED indicating whether the diagnostic result is good or bad, and a plurality of LEDs showing the degree of the step if the diagnostic result is bad. The condition diagnostic device for a lens for a television camera according to any one of claims 1 to 3, wherein: