JP2017139689A - Imaging device and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device which allows for switching of the control mode of an interchangeable lens and the camera body, so that the suppliable power of a power supply is not exceeded, even when an arbitrary interchangeable lens is attached to the camera body.SOLUTION: An imaging device includes a camera body 200 to which an interchangeable lens 100 can be attached, and an imaging device to which power can be supplied from multiple power supplies of different suppliable power. The camera body 200 determines the power supply supplying power to the imaging device. Furthermore, the camera body 200 acquires power consumption information of the camera body, and power consumption information of the interchangeable lens 100. Based on the suppliable power of the power supply, the power consumption information of the camera body, and the power consumption information of the interchangeable lens 100 thus determined, the camera body 200 determines the control mode of the interchangeable lens 100 and camera body 200.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an imaging apparatus and a control method thereof.

  The PoE method is known as a power supply method. PoE is an abbreviation for Power Over Ethernet (registered trademark). The PoE method is a method in which a power is superimposed on a LAN (Local Area Network) cable, and an external power supply is not required. Therefore, the PoE method is widely used in a wide range of devices including a network camera. However, in the PoE method, the maximum power (rated) that can be supplied is smaller than that of the AC power supply. Therefore, in an imaging apparatus having a function with large power, such as a pan / tilt motor or infrared illumination, the power consumption may exceed the maximum power in the PoE method. Patent Document 1 discloses an imaging apparatus that reduces the pan / tilt speed and the intensity of infrared illumination when the PoE method is used as a power source.

Japanese Patent No. 4776975

  When the imaging apparatus disclosed in Patent Document 1 is applied to an interchangeable lens type surveillance camera, it is difficult to control the power consumption so as not to exceed the maximum power in the PoE system. This is because there are various functions of the interchangeable lens, and the power consumption during the operation of each function varies depending on the interchangeable lens. For example, an interchangeable lens with infrared illumination and an interchangeable lens without infrared illumination have different power consumption by the amount of infrared illumination. In addition, when the interchangeable lens attached to the camera body is a telephoto lens, the power applied to the infrared illumination must be increased so that the infrared illumination can reach far. Therefore, even with an interchangeable lens equipped with infrared illumination, power consumption varies depending on whether it is a telephoto lens, a standard lens, or a wide-angle lens.

  However, in the interchangeable lens type surveillance camera, since the user selects which lens is to be attached, the power information of the interchangeable lens cannot be acquired in advance from the camera body. If all the functions of the interchangeable lens are normally operated, power exceeding the rating of the power supply is consumed, which may cause a shutdown or reboot of the power supply device and stop photographing. In addition, when the power supply device is connected to other surveillance cameras and a plurality of surveillance cameras form a network, the other surveillance cameras may also be affected, such as stopping shooting. There is sex.

  An object of the present invention is to provide an imaging apparatus that enables switching between control modes of an interchangeable lens and a camera body so that power that can be supplied from a power source does not exceed the power that can be supplied even when any interchangeable lens is attached to the camera body. And

  An imaging apparatus according to an embodiment of the present invention is an imaging apparatus capable of supplying power from a plurality of power supplies having different power supplies, and includes a lens device and a camera body to which the lens device can be attached. The camera body acquires power supply determining means for determining a power supply that supplies power to the imaging apparatus, first acquisition means for acquiring power consumption information of the camera body, and power consumption information of the lens apparatus The lens based on the second acquisition means, the determined suppliable power of the power source, the acquired power consumption information of the camera body, and the acquired power consumption information of the lens device. And a control mode determining means for determining a control mode of the camera body.

  According to the imaging apparatus of the present invention, even when an arbitrary interchangeable lens is attached to the camera body, the control mode of the interchangeable lens and the camera body can be switched so as not to exceed the power supplyable power.

It is a figure which shows the structural example of the imaging device of this embodiment. It is an example of the power consumption information of a camera main body. It is an example of the power consumption information of an interchangeable lens. It is a figure explaining the operation | movement process of CPU with which a camera main body is provided. It is a figure which shows an example of the control mode information corresponding to the interchangeable lens A. 6 is a diagram showing control mode information corresponding to an interchangeable lens B. FIG. It is a figure explaining the operation | movement process of CPU with which a camera main body is provided. It is a figure explaining the operation | movement process of CPU with which a camera main body is provided. 6 is a diagram illustrating an example of operation processing of the imaging apparatus in control mode 3. FIG.

Example 1
FIG. 1 is a diagram illustrating a configuration example of an imaging apparatus according to the present embodiment.
The imaging apparatus shown in FIG. 1 includes an interchangeable lens 100 and a camera body 200 to which the interchangeable lens 100 can be attached. The imaging device can supply power from a plurality of power supplies having different power supplies. The camera body 200 can communicate with an external storage medium 300 and a client PC (Personal Computer) 301 included in an external device (not shown) via a network. The client PC 301 is connected to a display 302 as display means.

  The interchangeable lens 100 is a lens device that includes a CPU (Central Processing Unit) 101, a storage element 102, and an infrared illumination 103. The CPU 101 controls the entire interchangeable lens 100. The storage element 102 is a storage unit that stores in advance the model number information of the interchangeable lens 100. The function of the interchangeable lens 100 includes at least an illumination function for irradiating a subject (in this example, an infrared irradiation function). The infrared illumination 103 is an irradiation unit that irradiates a subject with light (in this example, infrared light). The infrared illumination 103 is, for example, an LED (Light Emitting Diode), and the illuminance is controlled by the CPU 101.

  The camera body 200 includes a CPU 201, a storage element 202, a power supply type determination circuit 204, and a pan / tilt motor 203. The CPU 201 controls the entire camera body 200. The CPU 201 and the CPU 101 included in the interchangeable lens 100 can access each other. That is, the CPU 201 can request and acquire the model number information stored in the storage element 102 included in the interchangeable lens 100 from the CPU 101 included in the interchangeable lens 100. The storage element 202 is a storage unit that stores power consumption information of one or more functions of the camera body 200 in advance. The functions of the camera body 200 include at least one of a pan / tilt function and a function for driving a lens (for example, an autofocus function).

FIG. 2 is a diagram illustrating an example of power consumption information stored in the storage element of the camera body.
In the example illustrated in FIG. 2, the storage element 202 includes power consumption information 3W related to the pan / tilt function and power consumption information obtained by removing the power consumption necessary for the pan / tilt function from the maximum power consumption of the camera body 200, that is, The minimum power consumption information 5W necessary for imaging is stored in advance. The pan / tilt function is, for example, a function that realizes a pan / tilt operation of shaking the camera body 200 left and right and up and down.

  Returning to the description of FIG. The power supply type determination circuit 204 functions as a power supply determination unit that determines (determines) a power supply that supplies power to the imaging apparatus. In this example, the power supply type determination circuit 204 determines whether the power supply that supplies power to the camera body 200 is an AC (Alternating Current) power supply or PoE. The AC power supply is a first power supply that supplies power that is equal to or greater than the total of the maximum power consumption of the interchangeable lens 100 and the camera body 200. PoE is a second power supply that supplies power smaller than the total of the maximum power consumption of the interchangeable lens 100 and the camera body 200. In general, it is possible to determine the power supplied to the camera body 200 based on whether or not zero cross is detected. In this example, the pan / tilt motor 203 is a stepping motor and is driven by the CPU 201. The external storage medium 300 provided in the external device stores power consumption information of the interchangeable lens 100 that can be attached to the camera body 200 in advance for each interchangeable lens.

FIG. 3 is a diagram illustrating an example of power consumption information of the interchangeable lens stored in the external storage medium.
It is assumed that two types of interchangeable lenses A and B can be attached to the camera body 200. In this example, the external storage medium 300 stores power consumption information related to the infrared illumination function and power consumption information related to the autofocus function as power consumption information corresponding to each of the interchangeable lenses A and B. Yes.

FIG. 4 is a flowchart illustrating an example of operation processing of the CPU provided in the camera body.
When the power is turned on, the CPU 201 provided in the camera body 200 determines whether the power supplied to the camera body 200 is AC power or PoE based on the output signal from the power type determination circuit 204. Determination is made (step S500). In this example, it is assumed that the power supplied to the camera body 200 is determined to be PoE.

  Next, the CPU 201 functions as a first acquisition unit that accesses the storage element 202 and acquires power consumption information of the camera body 200 (step S501). For example, assuming that the power consumption information shown in FIG. 2 is stored in the storage element 202, the CPU 201 uses the power consumption information (3W) for the pan / tilt function, and the power consumption information (5W) necessary for imaging at the minimum. To get. Subsequently, the CPU 201 accesses the CPU 101 included in the interchangeable lens 100 to request and acquire model number information of the interchangeable lens 100 stored in the storage element 102 (step S502). In this example, it is assumed that model number information indicating that the interchangeable lens 100 is the interchangeable lens A can be acquired.

  Next, the CPU 201 transmits the model number information obtained in step S502 to an external device via the network, thereby requesting acquisition of power consumption information of the interchangeable lens corresponding to the model number information. The CPU 201 functions as a second acquisition unit that acquires power consumption information from the external device (step S503). The process of step S503 will be specifically described. In response to the acquisition request from the CPU 201, the external device acquires power consumption information corresponding to the interchangeable lens A among the power consumption information illustrated in FIG. 3 stored in the external storage medium 300. In this example, the external device acquires power consumption information (10 W) related to the infrared illumination function and power consumption information (5 W) related to the autofocus function. The external device transmits the acquired power consumption information to the camera body 200.

  Next, the CPU 201 functions as a control mode determination unit that determines the control mode of the interchangeable lens 100 and the camera body 200 based on the power source determined in step 500 and the power consumption information obtained in steps S501 and S503. (Step S504).

  Below, the specific example of the process of step S504 is demonstrated. The CPU 201 prevents the sum of the power consumption indicated by the power consumption information obtained in step S501 and the power consumption indicated by the power consumption information obtained in step S503 from exceeding the suppliable power corresponding to the determined power supply type. Determine the control mode.

  Power consumption information (3W) related to the pan / tilt function, power consumption information (5W) necessary for imaging, power consumption information (10W) related to the infrared illumination function obtained in step 503, and autofocus function The sum of the power consumption information (5 W) related to is 23 W. In step 500, it is determined that the power supply type is PoE. PoE has a fixed power supply rating, and the value specified in IEEE 802.3af is 13 W. Therefore, if all functions are operated simultaneously, the maximum PoE supply power (rated) ) Exceeding 13W. Therefore, the CPU 201 selects a control mode that can be realized within 13 W. For this reason, in the storage element 202 provided in the camera body 200, as shown in FIGS. The control mode information is correspondence information among the control mode, the operation related to the function of the camera body 200, the operation related to the function of the interchangeable lens 100, and the maximum power consumption of the imaging apparatus.

FIG. 5 is a diagram illustrating an example of control mode information corresponding to the interchangeable lens A.
The control mode selection process when the interchangeable lens A is attached to the camera body 200 will be described below.

  The control mode 1 is a control mode in which all functions are normal functions and can be operated simultaneously. In this embodiment, when all the functions are the normal functions and are operated simultaneously, 23 W is consumed, which exceeds 13 W, which is the maximum power (rated) that can be supplied by PoE. Therefore, this control mode is not selected. When the power source type determination result is an AC power source, the CPU 201 selects the control mode 1 in which all functions are normally operated. This is because, in the case of an AC power supply, it is generally possible to supply power much larger than the maximum power of the imaging device.

  Control mode 2 is a control mode in which only the infrared illumination function is always stopped, the other functions are normal functions, and simultaneous operation is possible. Control mode 2 requires power consumption of 5 W required for imaging, power consumption of 3 W required for the pan / tilt function, and power consumption of 5 W required for the autofocus function, so that the power consumption is 13 W in total. This power consumption does not exceed 13 W, which is the maximum power (rated) that can be supplied by PoE. Therefore, the control mode 2 is a selectable control mode. The control mode 3 is a control mode for exclusively controlling the pan / tilt function and the infrared illumination function.

FIG. 9 is a flowchart illustrating an example of operation processing of the imaging apparatus in the control mode 3 illustrated in FIG.
When the pan / tilt operation starts, first, the CPU 201 turns off the infrared illumination 103 (step S800). Subsequently, the CPU 201 drives the pan / tilt motor 203 (step 801). When the driving of the pan / tilt motor 203 is completed, the CPU 201 turns on the infrared illumination 103 again (step S802). According to the control mode 3, since the infrared illumination 103 and the pan / tilt motor 203 are exclusively driven, the maximum power consumption can be reduced as compared with the control mode 1. Control mode 3 does not require monitoring during panning and tilting operations (moving in the shooting direction), and is suitable for a user who wants to use the illuminance of infrared illumination to the maximum and monitor a distant subject.

  In control mode 3, power consumption 5W required for imaging, power consumption 3W required for the pan / tilt function, power consumption 10W required for the infrared illumination function, and power consumption 5W required for the autofocus function are required. However, since the pan / tilt function and the infrared illumination function are exclusively controlled, the power consumption is 20 W at the maximum. Since this power consumption exceeds the rated value of 13 W, the control mode 3 cannot be selected.

  The control mode 4 is a control mode that is used by limiting the infrared illumination function. For example, assuming that a maximum power consumption of 10 W is involved in normal operation, the function (illuminance of infrared illumination) is limited to 50%, and the power consumption is limited to a maximum of 5 W. The control mode 4 is suitable for a user who can monitor a target subject without using the illuminance of infrared illumination to the maximum.

  In the control mode 4, the power consumption 5W required for imaging, the power consumption 3W required for the pan / tilt function, the power consumption 5W required for the infrared illumination function (50% of the maximum 10W), and the power consumption required for the autofocus function Since 5 W is required, the power consumption is 18 W. Since this power consumption exceeds the rated value of 13 W, the control mode 4 cannot be selected.

  Control mode 5 is a control mode in which the infrared illumination function and the autofocus function are always stopped. In the control mode 5, since power consumption 5W required for imaging and power consumption 3W required for the pan / tilt function are required, the power consumption is 8W. Since this power consumption does not exceed the rating of 13 W, the control mode 2 can be selected. Therefore, the control mode that does not exceed the PoE rating of 13 W is the control mode 2 or the control mode 5. The control mode 5 has no functional advantage over the control mode 2. Therefore, the CPU 201 selects the control mode 2.

  That is, the CPU 201 refers to the control mode information corresponding to the interchangeable lens 100 attached to the camera body 200 among the control mode information stored in the storage element 202. Then, the CPU 201 determines the control mode corresponding to the maximum power consumption that does not exceed the power supplyable power as the control mode of the interchangeable lens 100 and the camera body 200.

FIG. 6 is a diagram illustrating control mode information corresponding to the interchangeable lens B.
The detailed method for calculating the power consumption is the same as that when the interchangeable lens A is attached to the camera body 200, and thus the description thereof is omitted.

  The control mode that does not exceed the PoE rating of 13 W is the control mode 2, the control mode 3, the control mode 4, or the control mode 5. The control mode 5 is excluded from the options because it has no functional advantage over the control modes 2 to 4.

  The control mode that can be selected is the control mode 2, the control mode 3, or the control mode 4. Which one to select may be selected based on the priority order determined in advance by the camera body 200. For example, when the priority order is determined as control mode 1> control mode 2> control mode 3> control mode 4> control mode 5, the CPU 201 selects the control mode 2. Note that the CPU 201 may display a UI indicating selectable control modes on the display 302 so that the user selects the control mode, and determines the control mode according to the user's selection.

  In the present embodiment, the description has been given by taking five control modes as an example. However, as a matter of course, the present invention is not limited to the described control modes. For example, it is preferable to provide an appropriate control mode according to the use form or function of the surveillance camera device that can be assumed, such as providing a control mode in which the pan / tilt function is stopped or driven at a reduced speed.

(Example 2)
In the first embodiment, the camera body 200 acquires power consumption information of the interchangeable lens from the external storage medium 300 via the network. In the second embodiment, the power consumption information of the interchangeable lens is stored in advance in the storage element 102 provided in the interchangeable lens 100, and the camera body 200 acquires the power consumption information of the interchangeable lens from the interchangeable lens 100.

FIG. 7 is a flowchart for explaining an operation process of the CPU provided in the camera body in the second embodiment.
Description will be made centering on differences from FIG. Step S600 and step S601 are the same as step S500 and step S501 of FIG.

  In step S <b> 602, the CPU 201 requests power consumption information of the interchangeable lens 100 from the CPU 101 included in the interchangeable lens 100. The CPU 101 acquires the power consumption information of the interchangeable lens 100 stored in the storage element 102 and transmits the power consumption information to the CPU 201 together with the model number information of the interchangeable lens 100. According to the process of step S602, the process of accessing the external storage medium 300 via the network as performed in step S503 of FIG. 4 is not necessary.

Step S604 is the same as step S504 in FIG. After the CPU 201 determines the control mode in step S604, the process ends.
According to the second embodiment, since it is not necessary to access the external storage medium 300 via a network, it is possible to shorten the time required to determine an operable control mode.

(Example 3)
In the third embodiment, it is assumed that an interchangeable lens outside the range assumed by the camera body 200 is attached and the camera body 200 cannot obtain the model number information of the interchangeable lens 100.

  If the model number information is not obtained, it is impossible to determine which interchangeable lens is mounted, and thus the power consumption information of the interchangeable lens 100 cannot be obtained. Therefore, the CPU 201 cannot determine whether or not the maximum power (rated) that can be supplied by PoE exceeds 13 W.

FIG. 8 is a flowchart for explaining an operation process of the CPU provided in the camera body in the third embodiment.
Below, it demonstrates centering on step S703, step S704, and step S705. Steps S700 to S702 are the same as steps S500 to S502 in FIG. However, it is assumed that the model number information is not obtained in step S702.

  In step S703, the CPU 201 determines whether the power source is an AC power source or a PoE based on the power source type determined in step S700. If the power source is an AC power source, the CPU 201 determines that sufficient power can be supplied. Therefore, in this case, even if the model number information of the interchangeable lens cannot be obtained, the process proceeds to step 705, and the control mode is determined without the user's consent. Specifically, the CPU 201 determines the control mode 1 in which all functions are operated.

  If the power source is PoE, the process proceeds to step S704. In step 704, the CPU 201 notifies the UI displayed on the display 302 that power consumption information could not be obtained. For example, when the CPU 201 starts the normal operation (indicating the operation in the control mode 1), the operation of the power supply device is affected depending on the power consumption of the interchangeable lens. A message stating that it is possible. "

  After the user acknowledges the notification content, the CPU 201 determines the control mode of the interchangeable lens 100 (step 705). Specifically, the CPU 201 determines the control mode 1 in which all functions are operated.

  According to the third embodiment, even when power is supplied by PoE and the power consumption information of the interchangeable lens 100 cannot be obtained, shooting is stopped due to the shutdown or reboot of the power supply device without the user's consent. Can be avoided. As mentioned above, although the preferable Example of this invention was described, this invention is not limited to these Examples, A various deformation | transformation and change are possible within the range of the summary.

(Other examples)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

100 Interchangeable lens 200 Camera body

Claims (11)

An imaging apparatus capable of supplying power from a plurality of power supplies having different power supplies,
A lens device and a camera body to which the lens device can be attached;
The camera body is
Power supply determining means for determining a power supply that supplies power to the imaging device;
First acquisition means for acquiring power consumption information of the camera body;
Second acquisition means for acquiring power consumption information of the lens device;
Based on the determined suppliable power of the power source, the acquired power consumption information of the camera body, and the acquired power consumption information of the lens apparatus, the control mode of the lens apparatus and the camera body An imaging apparatus comprising: control mode determining means for determining The control mode determining means is configured to determine the function of each of the lens device and the camera body when the total power consumption of the lens device and the power consumption of the camera body exceeds the power that can be supplied from the determined power source. The imaging mode according to claim 1, wherein a control mode in which maximum power consumption of the imaging device according to an operation does not exceed the power that can be supplied by the power source is determined as a control mode of the lens device and the camera body. apparatus. The first acquisition means includes
Obtain model number information of the lens device from the lens device,
The power consumption information of the lens device is acquired by making an acquisition request of the power consumption information of the lens device corresponding to the model number information to an external device via a network. The imaging device according to claim 2. The first acquisition means includes
A first power source that supplies power that is greater than or equal to a maximum power consumption of the lens device and the camera body when the model number information of the lens device cannot be acquired from the lens device; or the lens Determining which of the second power supplies supplies less than the sum of the maximum power consumption of the device and the camera body;
When the determined power source is the first power source, a control mode for operating all functions of the lens device and the camera body is determined as a control mode for the lens device and the camera body. The imaging apparatus according to claim 3. When the first acquisition unit cannot acquire the model number information of the lens device from the lens device, and the determined power source is the second power source, the power consumption information of the lens device is obtained. The imaging apparatus according to claim 4, further comprising notification means for notifying that the information cannot be obtained. The imaging apparatus according to claim 4 or 5, wherein the first power source is an AC power source, and the second power source is PoE. The functions of the camera body include at least one of a pan / tilt function and a lens driving function,
The imaging device according to any one of claims 1 to 6, wherein the function of the lens device includes at least an illumination function for irradiating a subject. The camera body stores in advance, as control mode information for each lens device, correspondence information between the control mode, the operation related to the function of the camera body, the operation related to the function of the lens device, and the maximum power consumption of the imaging device. Storage means for
The control mode determination unit is configured to control the control mode information stored in the storage unit when the total power consumption of the lens device and the power consumption of the camera body exceeds the determined power supply power. The control mode information corresponding to the lens device attached to the camera body is referred to, and the control mode corresponding to the maximum power consumption not exceeding the suppliable power of the power source is controlled by the lens device and the camera body. The imaging apparatus according to claim 7, wherein the imaging apparatus is determined as a mode. The control mode information stored in the storage means includes a control mode for stopping any of the pan / tilt function, the illumination function, and the function of driving the lens. Imaging device. The imaging according to claim 8 or 9, wherein the control mode information stored in the storage unit includes a control mode for operating the pan / tilt function and the illumination function exclusively. apparatus. A control method of an imaging apparatus comprising a lens device and a camera body to which the lens device can be attached, and capable of supplying power from a plurality of power sources having different power supplies,
The camera body determining a power source supplying power to the imaging device;
The camera body acquiring power consumption information of the camera body;
The camera body acquiring power consumption information of the lens device;
Based on the determined suppliable power of the power source, the acquired power consumption information of the camera body, and the acquired power consumption information of the lens apparatus, the control mode of the lens apparatus and the camera body And a step of determining the control method.

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