JP5644528B2 - Charging apparatus and radiation image detection system - Google Patents

Description

  The present invention relates to a charging device and a radiation image detection system.

  A so-called direct type radiographic imaging device that generates electric charges by a detection element in accordance with the dose of irradiated radiation such as X-rays and converts it into an electrical signal, or other radiation such as visible light with a scintillator or the like. Various types of so-called indirect radiographic imaging devices have been developed that convert charges into electromagnetic signals after they have been converted into electromagnetic waves of a wavelength, and then generated by photoelectric conversion elements such as photodiodes in accordance with the energy of the converted and irradiated electromagnetic waves. Yes. In the present invention, the detection element in the direct type radiographic imaging apparatus and the photoelectric conversion element in the indirect type radiographic imaging apparatus are collectively referred to as a radiation detection element.

This type of radiographic imaging device is known as an FPD (Flat Panel Detector), and has been conventionally formed integrally with a support base (or a bucky device). 2. Description of the Related Art A cassette-type radiographic image capturing apparatus that has a built-in power storage unit and is configured to be portable and can be driven without a cable has been developed (for example, see Patent Document 1).
When the radiographic imaging apparatus is configured to be portable, it is possible to perform imaging with a high degree of freedom including portable imaging on a patient's bedside or the like. In addition, unlike a stationary device, it can be easily carried, so when there are multiple radiographing rooms, one radiographic imaging device can be moved to a different radiographing room depending on the application. Is also possible.

In such a portable radiographic imaging device, it is necessary to charge the power storage unit. Therefore, in order to stably charge the power storage unit, it is provided with an accommodating portion formed with a groove portion having a length capable of accommodating the maximum width cassette, and is stable with all cassettes having different sizes. A cassette housing device (see, for example, Patent Document 2) that can be electrically connected to perform charging or output of a radiographic image, an inclined surface facing one of the side surfaces of the accommodated cassette, and a housing Opposite the other side of the cassette, and has a groove formed with a bottom surface that is inclined so that the cassette moves in the direction of the inclined surface when the cassette is received, and is stably electrically connected to the cassette. Thus, a cassette housing device (see, for example, Patent Document 3) capable of charging or outputting a radiographic image has been proposed.
Also, if the remaining power of the battery (battery) is insufficient, it will become unusable. To avoid this, there are multiple battery packs that can be removed in the charger / exchanger. An X-ray imaging apparatus (see, for example, Patent Document 4) that can select a battery pack to be replaced based on the charging status of the battery pack managed in (1) has also been proposed.

By the way, from the viewpoint of preventing overcharging, etc., it is desirable that charging of the power storage unit be performed by constant voltage charging that can easily perform charging up to a target voltage (for example, the rated voltage of the power storage unit). However, constant voltage charging has a problem that it takes too much time to charge, so in recent years, constant current charging is performed until the detection voltage of the battery reaches the target voltage, and switching to constant voltage charging is reached when the target voltage is reached. The method is adopted.
In such a charging method, it is necessary to more accurately detect and monitor the voltage of the power storage unit. In this case, if voltage detection means can be provided in the immediate vicinity of the power storage unit, “(detection voltage) ≈ (actual power storage unit voltage)” is obtained, and the voltage of the power storage unit can be detected more accurately. Is possible.

JP 2009-237074 A JP 2009-237293 A JP 2009-258677 A JP 2006-43191 A

However, the cassette-type radiographic imaging device is required to be thin and small. To achieve this, a space for installing the charging circuit including the voltage detecting means must be secured inside the radiographic imaging device. It becomes difficult.
On the other hand, if a charging circuit including a voltage detection means is provided on the external charging device side that sets the cassette type radiographic imaging device at the time of charging, and the voltage of the power storage unit is detected from the outside of the radiographic imaging device, the cassette type The radiation image capturing apparatus can be made thinner and smaller. However, when the voltage detection means is provided outside the radiation image capturing apparatus, the distance from the power storage unit to the voltage detection means becomes longer. Therefore, the influence of the path resistance in the wiring or the like from the power storage unit to the voltage detection means is generated, and “(detection voltage) = (actual power storage unit voltage) + (charging current) × (path resistance)” is obtained. Since a voltage higher than the voltage of the power storage unit is detected, the constant current charging is switched to the constant voltage charging before the voltage of the power storage unit actually reaches the target voltage. Therefore, since the power storage unit starts constant voltage charging at a voltage lower than planned, constant voltage charging is performed over a long period of time, which may increase the time required for charging.

In addition, the cassette type radiographic imaging device has a built-in type of power storage unit, specifically, the number of built-in power storage units, full charge capacity, charging characteristics, and voltage detection depending on the model. The route resistance to the means is different.
That is, the radiographic imaging device includes, for example, a radiographic imaging device including a light-weight type power storage unit including only one power storage unit, or a high-capacity type power storage unit in which a plurality of power storage units are connected in parallel. There is a radiographic imaging device. Further, there are cases where the power storage units provided are different, that is, the full charge capacity, the charging characteristics, and the like of the power storage units are different. Further, the path resistance from the power storage unit to the voltage detection means may be different due to the difference in the wiring length from the power storage unit to the connector (connector for connecting to the charging device).
Therefore, if charging is performed with a constant charging sequence regardless of the model of the radiographic imaging apparatus, the time required for charging may increase, or charging may not be performed until full charging.

  The present invention has been made in view of the above points, and enables efficient and accurate electronic devices such as radiographic imaging apparatuses regardless of the type of power storage unit incorporated therein, while making it possible to reduce the size of electronic devices. It is an object of the present invention to provide a charging device capable of charging and a radiation image detection system including the charging device.

In order to solve the above problems, the charging device of the present invention is:
In the charging device that charges the power storage unit from the outside of the housing through a connector provided between the electronic devices incorporating the power storage unit that supplies power to each functional unit inside the housing,
A power supply unit for supplying power for charging the power storage unit;
A voltage detection unit for detecting a voltage of the power storage unit;
A current detector for detecting a charging current flowing through the power storage unit;
A charge control unit that performs constant current charging until the voltage of the power storage unit detected by the voltage detection unit reaches a target voltage, and switches to constant voltage charging when the voltage of the power storage unit reaches the target voltage;
As the charging information related to the charging of the power storage unit, the electronic device incorporating the power storage unit or acquisition means for acquiring charging information corresponding to the type of the power storage unit,
The charging information includes information on a maximum applicable voltage in consideration of a path resistance from the power storage unit to the voltage detection unit and information on a full charge capacity of the power storage unit ,
Based on the full charge capacity included in the charging information acquired by the acquiring means, comprising a calculating means for calculating a voltage increase rate of the power storage unit in the constant current charging,
The charge controller is
Based on the charging information acquired by the acquisition means, specify the maximum applicable voltage, set as the target voltage ,
A current voltage increase rate is calculated based on the detected voltage of the voltage detection unit, and a difference between the calculated current voltage increase rate and the voltage increase rate calculated by the calculating means is outside a predetermined allowable range. In this case, charging of the power storage unit is stopped .
The charging device of the present invention is
In the charging device that charges the power storage unit from the outside of the housing through a connector provided between the electronic devices incorporating the power storage unit that supplies power to each functional unit inside the housing,
A power supply unit for supplying power for charging the power storage unit;
A voltage detection unit for detecting a voltage of the power storage unit;
A current detector for detecting a charging current flowing through the power storage unit;
A charge control unit that performs constant current charging until the voltage of the power storage unit detected by the voltage detection unit reaches a target voltage, and switches to constant voltage charging when the voltage of the power storage unit reaches the target voltage;
As the charging information related to the charging of the power storage unit, the electronic device incorporating the power storage unit or acquisition means for acquiring charging information corresponding to the type of the power storage unit,
The charging information includes information on a maximum applicable voltage in consideration of a path resistance from the power storage unit to the voltage detection unit,
The charging control unit specifies the maximum applicable voltage based on the charging information acquired by the acquiring unit, sets the target voltage as the target voltage,
The electronic device is a radiographic imaging device that performs radiographic imaging,
History information storage means for storing history information including a history of the charge amount of the power storage unit incorporated in the radiographic image capturing device, and a history of the number of images taken by the radiographic image capturing device,
The number of images that can be captured by the radiographic image capturing device includes the history information of the radiographic image capturing device stored in the history information storage unit, and the current charge amount of the power storage unit built in the radiographic image capturing device. And an estimation means for estimating based on
A shootable number output means for outputting the shootable number of sheets estimated by the estimation means;
It is characterized by providing.

In addition, the radiation image detection system of the present invention,
A radiographic imaging device that houses a power storage unit that supplies power to each functional unit inside the housing, and the radiographic imaging device from the outside of the housing to the power storage unit through a connector provided between the radiographic imaging device. In a radiation image detection system comprising: a charging device that performs charging;
The charging device is a charging device according to the present invention.

  According to the charging device and the radiographic image detection system of the system as in the present invention, the maximum applicable voltage considering the path resistance from the power storage unit to the voltage detection unit can be set as the target voltage. It is possible to reduce the influence due to the detection error due to the path resistance with the voltage detection unit. As a result, the transition from constant current charging to constant voltage charging at a voltage lower than planned is avoided, and the time required for charging can be shortened.

In addition, this makes it possible to provide a voltage detection unit on the charging device side without providing a voltage detection unit on the electronic device side such as a radiographic imaging device. It is possible to reduce the thickness.
Furthermore, by not providing a voltage detection unit on the electronic device side such as a radiographic imaging device, a connector, terminal, etc. for transmitting a detection voltage signal from the electronic device such as a radiographic imaging device to the charging device side becomes unnecessary. It is possible to further reduce the size and thickness of electronic equipment such as a radiographic imaging apparatus.

  In addition, since the maximum applicable voltage can be specified based on charging information corresponding to an electronic device such as a radiographic imaging apparatus connected to the charging apparatus via a connector provided between the radiographic imaging radiography Charging can be performed with a charging sequence corresponding to the model of an electronic device such as a device. Therefore, it becomes possible to charge efficiently and accurately regardless of the type of power storage unit incorporated in an electronic apparatus such as a radiographic apparatus.

It is the schematic which shows the system configuration | structure of the radiographic image detection system which concerns on this embodiment. It is a perspective view which shows the external appearance of the radiographic imaging apparatus shown in FIG. FIG. 2 is an equivalent circuit diagram illustrating configurations of a sensor panel unit, a reading unit, and the like of the radiographic image capturing apparatus illustrated in FIG. 1. It is the block diagram which illustrated only the structure relevant to the charge in the cradle and radiographic imaging apparatus shown in FIG. FIG. 5A is a diagram showing temporal changes in the detected voltage (solid line) and the actual battery voltage (broken line) in the conventional charge control, and FIG. 5B is a time chart of the charging current in the conventional charge control. It is a diagram which shows a change. FIG. 6A is a diagram showing temporal changes in the detected voltage (solid line) and the actual voltage of the battery (broken line) in the charging control of this embodiment, and FIG. 6B is the charging in the charging control of this embodiment. It is a diagram which shows the time change of an electric current. It is a block diagram which shows the system configuration | structure of a radiographic imaging system. It is a flowchart which shows an example of the flow of the charge control in this embodiment. FIG. 9A is a diagram showing temporal changes in the detected voltage (solid line) and the actual voltage of the battery (broken line) when the charging current is changed a plurality of times at the start of constant current charging, and FIG. FIG. 9C is an enlarged diagram of the time variation of the detection voltage at the start of constant current charging, and FIG. 9C is a diagram showing the time variation of the charging current when the charging current is changed a plurality of times at the start of constant current charging. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, embodiments to which the present invention is applicable are not limited to this, and the present invention is not limited to the illustrated examples.
In the present embodiment, a radiographic imaging apparatus is illustrated as an electronic device, and a cradle for charging the radiographic imaging apparatus is illustrated as a charging apparatus.

[Radiation image detection system]
FIG. 1 is a diagram showing a schematic configuration of a radiographic image detection system 1 in the present embodiment, and FIG. 2 is a perspective view of a radiographic image capturing apparatus 2 in the present embodiment.
As shown in FIG. 1, in the present embodiment, the radiological image detection system 1 includes a radiographic image capturing device 2 that incorporates a battery 28 as a power storage unit, and a cradle 4 on which the radiographic image capturing device 2 is placed. Configured.

[Radiation imaging equipment]
In this embodiment, the radiographic image capturing apparatus 2 is a portable cassette type FPD in which a so-called flat panel detector (hereinafter referred to as “FPD”) is configured in a cassette type, and is used for radiographic image capturing. Image data (hereinafter simply referred to as “image data”) is acquired.
In the following, a so-called indirect radiation image capturing apparatus that includes a scintillator or the like and converts the emitted radiation into electromagnetic waves of other wavelengths such as visible light to obtain an electrical signal will be described as the radiation image capturing apparatus 2. However, the present invention can also be applied to a so-called direct type radiographic imaging apparatus that directly detects radiation with a radiation detection element without using a scintillator or the like.

As shown in FIG. 2, the radiographic image capturing apparatus 2 includes a housing 21 that protects the inside. The housing 21 has at least a surface X on which radiation is received (hereinafter referred to as “radiation incidence surface X”) formed of a material such as a carbon plate or plastic that transmits radiation.
FIG. 2 shows a case where the casing 21 is formed of a front member 21a and a back member 21b. However, the shape and configuration are not particularly limited. It is also possible to form a cylindrical so-called monocoque shape or the like.

  As shown in FIG. 2, in the present embodiment, a power switch 22, an indicator 25, an apparatus-side connector portion 26, and the like are disposed on the side surface portion of the radiation image capturing apparatus 2.

The power switch 22 is used to switch on / off the power of the radiographic imaging apparatus 2, and by operating the power switch 22, each functional unit of the radiographic imaging apparatus 2 by a battery 28 (see FIG. 1) described later. A signal instructing the start and stop of the power supply is output to a main body control unit 30 (see FIG. 1) described later.
When the radiographic imaging device 2 is not used for imaging, the power consumption of the battery 28 can be suppressed by turning off the power (that is, stopping the power supply to each functional unit by the battery 28).

  The indicator 25 is composed of, for example, an LED or the like, and displays the remaining amount of charge of the battery 28 and various operation statuses.

The radiographic image capturing apparatus 2 is provided with a battery 28 that supplies power to each functional unit of the radiographic image capturing apparatus 2.
The battery 28 is arbitrary as long as it is a chargeable power storage unit. For example, the battery 28 may be a lithium ion secondary battery, a lithium ion capacitor (LIC), or an electric double layer capacitor. Also good.

  In addition, a lid member 70 that is opened and closed for replacement of the battery 28 built in the housing 21 is provided on a side surface portion of the radiographic image capturing apparatus 2. An antenna device 71 for the radiographic imaging device 2 to transmit and receive information to and from an external device via a wireless access point 113 (see FIG. 7 described later) is embedded in the side surface portion of the lid member 70. ing.

The device-side connector portion 26 (shown simply as “connector portion” in FIG. 1) is configured to be electrically connectable to the cradle 4 and is detachable from each other.
The apparatus-side connector section 26 is provided at a position corresponding to the cradle output connector section 42 (see FIG. 4 described later) when the radiographic image capturing apparatus 2 is placed on the cradle 4.

As shown in FIG. 2, the barcode reading unit 49 (described later) is a position on the radiation incident surface X that does not interfere with radiographic imaging and the radiographic imaging device 2 is placed on the cradle 4. A barcode seal 2a on which a barcode carrying identification information for identifying the radiographic imaging device 2 is printed is attached at a position corresponding to FIG.
Here, the position on the radiation incident surface X that does not interfere with radiographic imaging is, for example, a detection region in the sensor panel unit 24 (see FIG. 3 described later) (that is, a plurality of radiations arranged in a two-dimensional manner). This is a position corresponding to a region outside the entire region where the detection element 23 is provided.

  The position where the barcode seal 2a is affixed is a position on the surface of the housing 21 that does not interfere with radiographic imaging, and when the radiographic imaging apparatus 2 is placed on the cradle 4, the barcode is read. Any position corresponding to the portion 49 may be used. For example, it may be a side surface portion of the radiation imaging apparatus 2 or may be a surface opposite to the radiation incident surface X.

As shown in FIG. 1, a power supply circuit 29 is provided between the battery 28 and each functional unit. The power supply circuit 29 is a functional unit that appropriately converts and adjusts the voltage value and the like so that the power supplied from the battery 28 is suitable for each functional unit that is the supply destination.
The “functional units” referred to here are modules and devices that perform various functions in radiographic imaging and require power supply in the radiographic image capturing apparatus 2, and include the main body control unit 30, storage The unit 31, the scanning drive circuit 32, the signal readout circuit 33, the signal processing unit 34, the communication unit 35, the A / D conversion unit 40, and the like correspond to this.

A scintillator layer (not shown) that absorbs radiation incident from the radiation incident surface X and converts it into light having a wavelength including visible light is formed inside the radiation incident surface X (see FIG. 2) of the housing 21. Yes. As this scintillator layer, for example, a layer formed by using a phosphor in which a luminescent center substance is activated in a host body such as CsI: Tl, Gd ₂ O ₂ S: Tb, or ZnS: Ag can be used.

A plurality of radiation detection elements 23 (see FIG. 3 to be described later) for converting light output from the scintillator layer into electric signals are two-dimensionally formed on the surface of the scintillator layer opposite to the surface on the radiation incident surface X side. A plurality of sensor panel sections 24 are provided as detection means.
In the present embodiment, a photodiode is used as the radiation detection element 23. However, for example, a phototransistor or the like can also be used.

  In the present embodiment, a reading unit 45 (FIG. 3 to be described later) is a reading unit that reads the output value of each radiation detection element 23 of the sensor panel unit 24 by the main body control unit 30, the scanning drive circuit 32, the signal reading circuit 33, and the like. Reference) is configured.

The configuration of the sensor panel unit 24 and the reading unit 45 will be further described with reference to the equivalent circuit diagram of FIG.
As shown in FIG. 3, one electrode of each radiation detection element 23 of the sensor panel unit 24 is connected to the source electrode of a TFT 46 which is a signal reading switch element.
A bias line Lb is connected to the other electrode of each radiation detection element 23. The bias line Lb is connected to a bias power source 36, and is configured such that a bias voltage (reverse bias voltage in the present embodiment) is applied from the bias power source 36 to each radiation detection element 23.

  The gate electrode of each TFT 46 is connected to a scanning line Ll extending from the scanning drive circuit 32. The gate electrode of the TFT 46 is connected to the ON voltage (read voltage) from the TFT power source (not shown) via this scanning line Ll. An OFF voltage is applied.

  The drain electrode of each TFT 46 is connected to the signal line Lr. Each signal line Lr is connected to an amplifier circuit 37 in the signal readout circuit 33, and an output line of each amplifier circuit 37 is connected to an analog multiplexer 39 via a sample hold circuit 38. The signal readout circuit 33 is connected to an A / D converter 40 as processing means for converting the signal into a digital signal. The analog image signal sent from the analog multiplexer 39 is an A / D converter. 40 is converted into a digital image signal. The signal readout circuit 33 is connected to the main body control unit 30 via the A / D conversion unit 40, and a digital image signal is output to the main body control unit 30. A storage unit 31 is connected to the main body control unit 30, and the main body control unit 30 is configured to store the digital image signal output from the A / D conversion unit 40 in the storage unit 31 as image data. ing.

  The main body control unit 30 is, for example, a computer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown), and comprehensively controls the entire radiographic imaging apparatus 2.

The ROM stores a live-action image data generation process, an offset correction value generation process, a program for performing various processes in the radiation image capturing apparatus 2, various control programs, parameters, and the like.
The main body control unit 30 is configured such that a predetermined program stored in the ROM is read out and developed in a work area of the RAM, and the CPU executes various processes according to the program.

  The signal processing unit 34 is a functional unit that performs predetermined signal processing on the image data, thereby converting the image data into data in a format suitable for transfer to an external device.

  The storage unit 31 is configured by, for example, an HDD (Hard Disk Drive) or a flash memory. The storage unit 31 stores actual image data generated by the reading unit 45 (see FIG. 3), that is, image data based on radiation transmitted through the subject, dark image data, that is, an image acquired without irradiation. Data etc. are stored.

The storage unit 31 may be a built-in memory or a removable memory such as a memory card.
Further, the storage capacity is not particularly limited, but it is preferable to have a storage capacity capable of storing a plurality of pieces of image data. By providing such a storage unit 31 in the radiographic image capturing apparatus 2, it is possible to continuously irradiate a subject with radiation, and to record and store image data each time. It becomes possible to perform video shooting.

The communication unit 35 is connected to the antenna device 71 and transmits / receives various information to / from an external device such as the console 101 under the control of the main body control unit 30.
In the present embodiment, the communication unit 35 communicates with an external device such as the console 101 in a wireless manner via a wireless access point 113 (see FIG. 7 described later).
Specifically, for example, the communication unit 35 transmits image data based on an image signal read by the reading unit 45 and converted from an analog signal to a digital signal by the A / D conversion unit 40 to an external device such as the console 101. Or receiving imaging order information or the like from an external device such as the console 101.

[Cradle]
In the present embodiment, the cradle 4 is a charging device for a capacitor configured to be able to supply power to the radiographic image capturing apparatus 2 from the outside by mounting the radiographic image capturing apparatus 2.
FIG. 4 is a block diagram illustrating only a configuration related to charging in the cradle 4 and the radiation image capturing apparatus 2.

  As shown in FIG. 4, the cradle 4 includes an AC / DC constant voltage power supply unit 41 connected to an outlet 8 connected to an external power supply (not shown), and an AC / DC constant voltage power supply unit 41 during charging. The cradle output connector unit 42 as a connector for applying a charging voltage to the battery 28 of the radiographic image capturing device 2, and the radiographic image capturing device from the AC / DC constant voltage power source unit 41 through the wirings L 1 and L 2 of the cradle output connector unit 42. 2, a voltage detector 43 that detects the voltage at both ends (between both electrodes) of the battery 28, a current detector 44 that detects a current flowing through the wiring L 1 when the battery 28 of the radiographic imaging apparatus 2 is charged, and an AC / DC constant Charge control unit 48 that controls voltage power supply unit 41 to selectively execute constant current charging and constant voltage charging, and is attached to radiographic imaging apparatus 2 Composed bar from the code seal 2a and the bar code reader 49 for reading a bar code, a storage unit 47 for storing information relating to the radiographic image capturing apparatus 2, equipped with.

The cradle output connector portion 42 is provided at a position that matches the device-side connector portion 26 of the radiographic imaging device 2 when the radiographic imaging device 2 is inserted and set in the slot 4a formed in the cradle 4. In addition, two terminals 42a and 42b of a positive electrode and a negative electrode which are elastically supported so as to be press-contactable to the device-side connector portion 26 are provided.
Terminals 26a and 26b connected to the positive electrode and the negative electrode of the battery 28 are provided in the device-side connector portion 26 of the radiographic image capturing device 2, and the radiographic image capturing device 2 is set by being inserted into the slot 4a. The positive terminals and the negative terminals are in press contact with each other to form a state where electricity can be passed.

The AC / DC constant voltage power supply unit 41 includes an AC / DC converter that is connected to an outlet 8 that is an external AC power supply and outputs a constant DC voltage power supply, and a PWM output circuit that includes a switching element. .
The switching element of the PWM output circuit constituting the AC / DC constant voltage power supply unit 41 is turned on / off by the charge control unit 48, and the duty ratio is arbitrarily controlled, so that the constant current charging for the battery 28 is performed. It is possible to execute constant voltage charging.

The current detection unit 44 outputs a detection signal corresponding to the charging current to the charge control unit 48 by a load provided on the wiring L1.
The voltage detection unit 43 detects the voltage between the wiring L 1 and the wiring L 2 to detect the voltage of the battery 28 and outputs the detection signal to the charging control unit 48. The voltage detection unit 43 detects the voltage in the state affected by the voltage drop (detection voltage error) due to the wiring from the voltage detection unit 43 to the battery 28 and the resistances of the connectors 42 and 26. And output to the charging control unit 48.

  The bar code reading unit 49 is an identification information reading unit such as a bar code reader that optically reads the bar code and outputs it to the charging control unit 48, and inserts the radiation image capturing apparatus 2 into the slot 4 a formed in the cradle 4. When set in such a manner, it is provided at a position that coincides with the barcode seal 2a attached to the radiographic imaging device 2.

  Note that the method for acquiring the identification information of the radiographic imaging device 2 from the radiographic imaging device 2 placed on the cradle 4 (that is, inserted into the slot 4a formed in the cradle 4) is not necessarily a bar. The radiographic imaging device 2 may be one that carries the identification information, and the cradle 4 acquires the identification information from the radiographic imaging device 2 placed on the cradle 4. Any configuration may be used as long as it includes identification information acquisition means. For example, the identification information of the radiographic image capturing device 2 is provided on the external shape of the radiographic image capturing device 2, specifically the size of the casing 21, the position / number of unevenness provided on the casing 21, and the casing 21. If the position / number of the reflecting plate or the like is associated in advance, it is possible to read the outer shape of the radiographic image capturing device 2 and acquire the identification information of the radiographic image capturing device 2. Further, for example, it is possible to communicate with the radiographic imaging apparatus 2 via the cradle output connector unit 42 and the apparatus-side connector unit 26 to acquire identification information of the radiographic imaging apparatus 2.

The storage unit 47 serves as a charging information storage unit, in the charging information storage area of the storage unit 47, identification information for identifying the radiographic image capturing device 2, and the battery 28 built in the radiographic image capturing device 2. The charging information related to charging is stored in association with each other.
Here, the charging information includes, for example, the rated voltage V1 of the battery 28, the path resistance RL from the battery 28 to the voltage detection unit 43, the charging current Is for constant current charging, the charging end value Ie for constant voltage charging, The information includes the full charge capacity Cf, the overdischarge voltage threshold value of the battery 28, and the like. Each value included in the charging information is, for example, a value measured when the radiographic image capturing apparatus 2 is shipped from the factory.

  The storage unit 47 also serves as history information storage means in the history information storage area of the storage unit 47 for identifying information for identifying the radiographic image capturing apparatus 2 and a battery built in the radiographic image capturing apparatus 2. The history information including the history of the amount of charge of 28 and the history of the number of images taken by the radiation image capturing apparatus 2 are stored in association with each other.

Here, the charging control by the charging control unit 48 will be described with reference to FIGS. 5 and 6.
FIG. 5 is a diagram showing changes in voltage and charging current of the battery 28 when a conventional charging method is applied, and FIG. 6 is a diagram showing changes in voltage and charging current of the battery 28 in the present embodiment. It is.

FIG. 5A shows temporal changes in the detected voltage (solid line) in the conventional charge control and the actual voltage (broken line) of the battery 28, and FIG. 5B shows the charging current time in the conventional charge control. Changes.
In the example of FIG. 5, when charging the battery 28, first, constant current charging is performed so as to maintain a predetermined charging current Is (for example, 10 A), and the rated voltage V <b> 1 ( Alternatively, the voltage may be less than the rated voltage and close to the voltage.For example, when 4.0 V) is set as the target voltage and the voltage of the battery 28 reaches the target voltage (rated voltage V1), the target voltage is set. Switch to constant voltage charging to maintain (rated voltage V1). Then, the charging is terminated when the charging current becomes equal to or less than a predetermined charging end value Ie.

However, in the case of this example, when the voltage detection unit 43 in the cradle 4 outside the radiographic imaging apparatus 2 performs voltage detection of the battery 28 as in the radiographic image detection system 1 of the present embodiment, the battery Since the distance between the voltage 28 and the voltage detection unit 43 is large, the path resistance RL is affected, and the battery 28 is switched to constant voltage charging before the actual voltage of the battery 28 reaches the target voltage (rated voltage V1). Will end up. As a result, there arises a problem that the time required for constant voltage charging increases.
Therefore, in the present embodiment, instead of the rated voltage V1 of the battery 28, the maximum applicable voltage V2 in consideration of the influence of the path resistance RL from the battery 28 to the voltage detection unit 43 is set as the target voltage. .

Further, the radiographic imaging apparatus 2 has a built-in type of battery 28, specifically, the number of built-in batteries 28, a full charge capacity Cf, a charge characteristic, and a voltage detection unit according to the model and the like. The route resistance RL up to 43 is different. For this reason, the radiographic imaging apparatus 2 determines the charging information (specifically, the rated voltage V1 of the battery 28, the path resistance RL from the battery 28 to the voltage detector 43, the charging current for constant current charging) according to the model and the like. Is, charging end value Ie of constant voltage charging, full charge capacity Cf of battery 28, overdischarge voltage threshold of battery 28, etc.) are different.
Therefore, in the present embodiment, prior to charging the battery 28, the rated voltage V1, the path resistance RL, the charging current Is, the charging end value Ie, the full charge capacity Cf, the overdischarge are stored from the charging information storage area of the storage unit 47. It is assumed that charging information including a voltage threshold value is acquired.

  In addition, when the battery 28 is comprised by the some battery, let the full charge capacity | capacitance Cf be the full charge capacity in the whole some battery which comprises the battery 28. FIG. In this case, instead of the full charge capacity Cf, or in addition to the full charge capacity Cf, information that can calculate the full charge capacity of the entire plurality of batteries constituting the battery 28 (specifically, for example, each battery Information on the full charge capacity of each battery and how to connect each battery) is stored in the charge information storage area of the storage unit 47, and the full charge capacity Cf, that is, the plurality of batteries constituting the battery 28 is determined from the information. It can also be configured to calculate the full charge capacity.

  When the battery 28 is composed of a plurality of batteries, the rated voltage V <b> 1 is a rated voltage across the plurality of batteries constituting the battery 28. In this case, instead of the rated voltage V1 or in addition to the rated voltage V1, information that can calculate the rated voltage for all of the batteries constituting the battery 28 (specifically, for example, the rated voltage of each battery) And information on how to connect each battery, etc.) are stored in the charging information storage area of the storage unit 47, and the rated voltage V1, that is, the rated voltage of all the batteries constituting the battery 28, is calculated from the information. It is also possible to configure as described above.

Further, instead of the path resistance RL or in addition to the path resistance RL, information capable of calculating the path resistance RL is stored in the charging information storage area of the storage unit 47, and the path resistance RL is calculated from the information. It is also possible to configure as described above.
Here, the information that can calculate the path resistance RL is, for example, the path resistance from the battery 28 to the device-side connector unit 26, the path resistance from the cradle output connector unit 42 to the voltage detection unit 43, the device-side connector unit 26, For example, the resistance of the cradle output connector portion 42. In this case, of the information that can calculate the path resistance RL, information on the cradle 4 side (for example, the path resistance from the cradle output connector section 42 to the voltage detection section 43, the resistance of the cradle output connector section 42, etc.) is stored in the storage section 47. In the charge information storage area of the storage unit 47, information on the radiographic imaging device 2 side (for example, path resistance from the battery 28 to the device-side connector unit 26 and resistance of the device-side connector unit 26) Etc.) can also be stored.

  FIG. 6A shows temporal changes in the detection voltage (solid line) and the actual voltage of the battery 28 (broken line) in the charging control of this embodiment, and FIG. 6B shows the charging control in this embodiment. The time change of the charging current is shown.

First, when the barcode reading unit 49 reads a barcode from the barcode seal 2a affixed to the radiographic image capturing apparatus 2 and outputs the barcode to the charging control unit 48, the charging control unit 48 selects the radiation from the barcode. The identification information of the image capturing device 2 is acquired, and the charging information corresponding to the acquired identification information is acquired from the charging information storage area of the storage unit 47.
That is, the barcode reading unit 49 and the charge control unit 48 form an acquisition unit of the present invention.

Next, the charging control unit 48 specifies the maximum applicable voltage V2 based on the acquired charging information, and sets the specified maximum applicable voltage V2 as a target voltage.
Specifically, for example, the charging control unit 48 calculates the maximum applicable voltage V2 (V2 = V1 + RL × Is) using the rated voltage V1, the path resistance RL, and the charging current Is included in the acquired charging information. The calculated maximum applicable voltage V2 is set as the target voltage. In this case, the rated voltage V1, the path resistance RL, and the charging current Is take into account the path resistance RL from the battery 28 to the voltage detection unit 43 included in the charging information stored in the charging information storage area of the storage unit 47. This is information on the maximum applicable voltage V2.

  The charging information stored in the charging information storage area of the storage unit 47 may include the maximum applicable voltage V2. In this case, the maximum applicable voltage V2 can be set as the target voltage without calculating the maximum applicable voltage V2.

  Next, the charging control unit 48 starts charging the battery 28, and first, the charging current detected by the current detection unit 44 maintains the charging current Is (10A as an example) included in the acquired charging information. The AC / DC constant voltage power supply unit 41 is controlled to start constant current charging. The constant current control is continuously executed until the voltage detected by the voltage detector 43 reaches the target voltage (maximum applicable voltage V2). As a result, the constant current control can be performed until the actual voltage of the battery 28 reaches the rated voltage V1 of the battery 28.

  Next, when the detected voltage of the battery 28 reaches the target voltage (maximum applicable voltage V2), constant voltage charging is executed. Then, when the gradually decreasing charging current becomes equal to or less than the charging end value Ie included in the acquired charging information, the charging is ended. In the constant voltage charging, the charging current decreases, so that the influence of the path resistance RL is gradually reduced. Finally, there is almost no difference between the detected voltage and the actual voltage of the battery 28.

At this time, in the present embodiment, the charging control unit 48 measures the charging time required from the charging start time to the charging end time of the battery 28, and the charging start time (or the charging end time) The date and time etc. may be added and stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic imaging device 2 incorporating the battery 28.
Here, the charging end time is the time when the current detected by the current detection unit 44 becomes equal to or lower than the charging end value Ie in the constant voltage charging, or before the switching from the constant current charging to the constant voltage charging or the constant voltage charging. If the radiation imaging apparatus 2 is pulled out from the cradle 4 before the current detected by the current detection unit 44 becomes equal to or lower than the charging end value Ie, it is the time when it is pulled out.

In the present embodiment, the charge control unit 48 detects the voltage change ΔV1 between the two current values before and immediately after the start of energization at the start of constant current charging of the battery 28 by the voltage detection unit 43, The voltage change ΔV1 is added with the date and time of detection (or may be the start time of constant current charging), and stored in association with the identification information of the radiation imaging apparatus 2 incorporating the battery 28. The history information storage area of the unit 47 is configured to be stored.
The charging current rises from 0 to Is and the detection voltage rises from 0 to ΔV1 before and after the start of energization at the start of constant current charging. If the time for causing these changes is sufficiently short, the actual voltage of the battery 28 hardly rises. Therefore, it is considered that the voltage change ΔV1 is caused by the path resistance RL from the battery 28 to the voltage detection unit 43.

  Then, the charge control unit 48 calculates the voltage change ΔV0 (ΔV0 = Is × RL) in the initial state (that is, at the time of factory shipment) using the path resistance RL and the charging current Is included in the acquired charging information, When the calculated voltage change ΔV0 in the initial state is compared with the current voltage change ΔV1 detected and stored, and the difference between them is outside a predetermined voltage change allowable range, the battery 28 is changed due to a change with time. And a path from the battery 28 to the voltage detection unit 43 is determined to have deteriorated, and a deterioration error is output.

  In the present embodiment, the charging control unit 48 calculates the voltage increase rate of the battery 28 in constant current charging based on the voltage detected by the voltage detection unit 43, that is, the voltage increase per unit time, and the voltage increase rate. Is added to the date and time of the calculation time (or may be the start time of constant current charging), and the history of the storage unit 47 is associated with the identification information of the radiographic imaging device 2 incorporating the battery 28. Store in the information storage area.

Then, the charge control unit 48 uses the full charge capacity Cf and the charge current Is included in the acquired charge information to use the voltage increase rate V / T (V / T = Is / Cf, V / T = Is / Cf is derived from Q = Cf × V and Q = Is × T), and the calculated voltage increase rate V / T in the initial state is calculated. If the difference between the two is outside the predetermined voltage increase rate allowable range, deterioration of the battery 28, a short circuit inside the battery 28, etc. have occurred due to changes over time. And charging of the battery 28 is stopped and a charging error is output.
Here, the voltage increase rate V / T is a voltage increase rate in constant current charging, that is, a voltage increase per unit time in constant current charging, and is shown in the diagrams shown in FIGS. 5 (A) and 6 (A). Of these, the slope of the straight line in constant current charging is shown.

In other words, the charging control unit 48 calculates the voltage increase rate of the battery 28 in constant current charging (voltage increase rate V / T in the initial state) based on the full charge capacity Cf included in the acquired charging information. Function as.
In addition, when the difference between the calculated current voltage increase rate and the calculated voltage increase rate V / T in the initial state is outside a predetermined allowable range, the charging control unit 48 outputs a charging error. Functions as output means.

Here, an error message is displayed on a display unit (not shown) provided in the cradle 4, or an error notification signal is transmitted from the cradle 4 to an external device such as the console 101 to the display unit (not shown) provided in the external device. A deterioration error or a charging error is output by displaying an error message or the like.
When an error notification signal is transmitted from the cradle 4 to an external device such as the console 101, the error notification signal is transmitted in a wired or wireless manner by connecting the cradle 4 and an external device such as the console 101 by wired or wireless connection. It is also possible to configure such that the error notification signal is transmitted via the radiographic imaging apparatus 2 connected to an external apparatus such as the console 101.

  In the present embodiment, the current voltage increase rate of the battery 28 in constant current charging is calculated and stored based on the voltage detected by the voltage detection unit 43, but the present invention is not limited to this. For example, the current constant current charge required time of the battery 28 may be calculated and stored based on the voltage detected by the voltage detection unit 43. In this case, using the full charge capacity Cf and the charge current Is included in the acquired charge information, the constant current charge required time T1 (T1 = (Is / Cf) × ((maximum) at the time of factory shipment). Applicable voltage V2)-(remaining charge of battery 28))) is calculated, and the calculated constant current charge required time T1 in the initial state and the current constant current charge required time calculated and stored are calculated. In comparison, when the difference between the two is outside the predetermined constant current charge required time allowable range, it is determined that the battery 28 is deteriorated or the battery 28 is short-circuited due to the change with time, and the battery 28 is charged. And a charging error is output.

  Further, in the present embodiment, the charge control unit 48 determines the amount of charge of the battery 28 when the radiographic imaging device 2 is placed on the cradle 4 and the amount of charge of the battery 28 when the charge ends. The history information storage area of the storage unit 47 is configured to store the charge amount history of the battery 28 built in the radiation image capturing apparatus 2.

  Specifically, the charging control unit 48 is based on the voltage detected by the voltage detection unit 43 when the radiographic imaging device 2 is mounted on the cradle 4, and the amount of charge of the battery 28 when it is mounted. That is, the remaining amount of charge of the battery 28 at the start of charging is calculated, and the date and time of the calculated remaining amount (or the time when the radiographic imaging device 2 is placed on the cradle 4) may be used. And the like are added and stored in the history information storage area of the storage unit 47 in association with the identification information of the radiation imaging apparatus 2 incorporating the battery 28.

  In addition, the charge control unit 48 calculates the charge amount of the battery 28 at the end of charging based on the voltage detected by the voltage detection unit 43 at the end of charge, and calculates the charge amount at the calculation time (or the end of charge time). The date / time etc.) may be added and stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic imaging apparatus 2 incorporating the battery 28. Here, the charging end time is the time when the current detected by the current detection unit 44 becomes equal to or lower than the charging end value Ie in the constant voltage charging, or before the switching from the constant current charging to the constant voltage charging or the constant voltage charging. If the radiation imaging apparatus 2 is pulled out from the cradle 4 before the current detected by the current detection unit 44 becomes equal to or lower than the charging end value Ie, it is the time when it is pulled out.

  Further, in the present embodiment, the charging control unit 48 acquires the number of images taken since the end of the previous charging from the radiation image capturing device 2 inserted in the cradle 4, and as a history of the number of images captured by the radiation image capturing device 2, The history information storage area of the storage unit 47 is configured to be stored.

  Specifically, the main body control unit 30 of the radiographic image capturing apparatus 2 is configured to store the number of captured images from the end of the previous charging in the storage unit 31 or the like, and the charging control unit 48 of the cradle 4 includes: Via the cradle output connector section 42 and the apparatus-side connector section 26, the number of captured images stored in the storage unit 31 of the radiographic image capturing apparatus 2 can be acquired. Then, the charging control unit 48 adds the date and time of the time when the acquired number of images is acquired (or may be the previous charging end time) to the acquired number of images to be acquired. The information is stored in the history information storage area of the storage unit 47 in association with the identification information.

The storage unit 31 or the like of the radiographic image capturing apparatus 2 only needs to store information that allows determination of the number of captured images from the end of the previous charge. For example, as in the present embodiment, the information from the end of the previous charge is stored. The number of shots itself may be stored, or the shooting date and time and the number of shots taken at that time may be stored in association with each other.
In the present embodiment, the radiographic image capturing apparatus 2 placed on the cradle 4 is configured to acquire the number of radiographed images from the previous charging end of the radiographic image capturing apparatus 2, but the present invention is not limited thereto. For example, when the cradle 4 and an external device such as the console 101 are connected by wire or wirelessly, imaging from the external device such as the console 101 since the end of the previous charging of the radiographic imaging device 2 is performed. The number of images (in this case as well, any information that can determine the number of images taken since the end of the previous charging may be used) may be acquired.

Further, in the present embodiment, the charge control unit 48 is associated with the identification information of the radiographic imaging device 2 placed on the cradle 4 and stored in the history information storage area of the storage unit 47 in the previous charge. Using the amount of charge of the battery 28 at the time of termination, the remaining amount of charge of the battery 28 of this time, and the number of shots taken since the end of the previous charge, the amount of charge used per shot S (S = (((previous (The amount of charge of the battery 28 at the end of charging) − (the remaining charge of the battery 28 at this time)) / (the number of images taken since the end of the previous charge)) And is stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic image capturing apparatus 2.
Specifically, for example, the charge amount at the end of the previous charge is 100% (full charge), the remaining charge of the battery 28 is 0% (empty), and the number of shots since the end of the previous charge is When the number is 50, the charge amount S used for shooting one image is calculated as “2% of the full charge amount”.

In the present embodiment, the charging control unit 48 captures a single image stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic image capturing apparatus 2 placed on the cradle 4. The radiation image placed on the cradle 4 based on the average value of the per-use charge amount S and the current charge amount of the battery 28 detected based on the voltage detected by the voltage detection unit 43 at the present time The imaging device 2 is configured to estimate and output the current number of images that can be captured.
Specifically, for example, when the average value of the used charge amount S per one shot is “2% of the full charge amount” and the current charge amount of the battery 28 is “70% of the full charge amount”, It is estimated that the current number of images that can be taken is 35.

Here, the display unit (not shown) provided in the cradle 4 displays the current number of images that can be shot, or the cradle 4 sends a shootable number notification signal to an external device such as the console 101 to display the external device. The number of images that can be photographed at the current time is output by, for example, displaying the number of images that can be photographed at the current time in a section (not shown).
When transmitting the shootable number notification signal from the cradle 4 to an external device such as the console 101, the cradle 4 and the external device such as the console 101 are connected by wire or wirelessly, and the shootable number notification signal is wired or wirelessly connected. It is also possible to transmit the number of images that can be captured via the radiographic image capturing device 2 connected to an external device such as the console 101 or the like. .

That is, the charging control unit 48 sets the number of images that can be captured by the radiation image capturing apparatus 2 to the history information of the radiation image capturing apparatus 2 stored in the history information storage area of the storage unit 47 and the radiation image capturing apparatus 2. It functions as an estimation means that estimates based on the current charge amount of the built-in battery 28.
Further, the charge control unit 48 functions as a shootable number output unit that outputs the estimated number of shootable images.

  Note that, in the present embodiment, the used charge amount S per one shot stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic image capturing apparatus 2 placed on the cradle 4. The radiographic image capturing apparatus 2 is configured to estimate and output the number of images that can be captured at the current time based on the average value of the radiographic image, but the present invention is not limited to this. For example, the radiographic image capturing apparatus 2 is mounted on the cradle 4. The maximum amount of charge used (or the amount of charge used per one image) of the amount of charge S used per image stored in the history information storage area of the storage unit 47 in association with the identification information of the radiation image capturing device 2 Based on the average of the plurality of used charge amounts S when the used charge amounts S are arranged in descending order). Output It is also possible to configure such that each shot is stored in the history information storage area of the storage unit 47 in association with the identification information of the radiation image capturing apparatus 2 placed on the cradle 4. Based on the minimum used charge amount of the used charge amount S (or an average value of a plurality of lower used charge amounts S in the case where the used charge amount S per one image is arranged in descending order). The radiation image capturing apparatus 2 can be configured to estimate and output the number of images that can be captured at the present time, or can be configured to estimate and output both of them. .

  In addition, for example, the latest of the used charge amounts S per one shot stored in the history information storage area of the storage unit 47 in association with the identification information of the radiation image capturing apparatus 2 placed on the cradle 4. On the basis of the used charge amount S, it is also possible to estimate and output the current number of radiographable devices 2 that can be captured.

Moreover, in this embodiment, the charge control part 48 is the overdischarge of the battery 28 by which the detection voltage by the voltage detection part 43 at the time of the radiographic imaging apparatus 2 being mounted in the cradle 4 is contained in the acquired charging information. When the voltage is below the threshold voltage, it is determined that the battery 28 is in an overdischarged state, the date and time at the time of determination is given to the determination result (overdischarge determination result), and the identification information of the radiographic image capturing apparatus 2 is added. It is configured to be associated and stored in the history information storage area of the storage unit 47.
And the charge control part 48 is based on the overdischarge determination result memorize | stored in the log | history information storage area of the memory | storage part 47 about the battery 28 built in the radiographic imaging device 2 mounted in the cradle 4. It is determined whether or not the battery 28 has been repeatedly determined a predetermined number of times (for example, 5 times) if it is in an overdischarged state. If it is determined that the battery 28 has been repeatedly determined a predetermined number of times in the overdischarged state, While stopping, it is configured to output an overdischarge error such as a maintenance error.

That is, the charge control unit 48 functions as a determination unit that determines the overdischarge state of the battery 28.
In addition, when the number of times that the charging control unit 48 determines that the overdischarge state has reached a predetermined number, it functions as an overdischarge error output means for outputting an overdischarge error.

Here, an error message is displayed on a display unit (not shown) provided in the cradle 4, or an error notification signal is transmitted from the cradle 4 to an external device such as the console 101 to the display unit (not shown) provided in the external device. An overdischarge error is output, for example, by displaying an error message.
When an error notification signal is transmitted from the cradle 4 to an external device such as the console 101, the error notification signal is transmitted in a wired or wireless manner by connecting the cradle 4 and an external device such as the console 101 by wired or wireless connection. It is also possible to configure such that the error notification signal is transmitted via the radiographic imaging apparatus 2 connected to an external apparatus such as the console 101.

[Radiation imaging system]
The radiographic image detection system 1 is arranged and used in a radiographic image capturing system 100 as shown in FIG. 7, for example.
The radiographic imaging system 100 includes, for example, a radiographic image detection system 1 and a console 101 that can communicate with the radiographic imaging apparatus 2 that constitutes the radiographic image detection system 1.

As shown in FIG. 7, the radiographic imaging device 2 is provided in an imaging room R1 that performs imaging of a subject (an imaging target site of the patient M) that is a part of the patient M by irradiating radiation, for example. The console 101 is provided corresponding to the photographing room R1.
In the present embodiment, a case where one radiographing room R1 is provided in the radiographic imaging system 100 and three radiographic imaging apparatuses 2 are arranged in the radiographic room R1 will be described as an example. The number of imaging rooms R1 and the number of radiographic image capturing apparatuses 2 provided in each imaging room R1 are not limited to the illustrated example.
Further, when there are a plurality of shooting rooms R1, the console 101 may not be provided corresponding to each shooting room R1, and one console 101 may be associated with the plurality of shooting rooms R1. Good.

  In the radiographing room R1, there is a bucky device 110 having a cassette holding unit 111 that can load and hold the radiographic image radiographing device 2, and radiation such as an X-ray tube that irradiates a subject (an imaging target site of the patient M). A radiation generation device 112 including a source (not shown) is provided. The cassette holding unit 111 is for loading the radiographic image capturing apparatus 2 at the time of photographing.

FIG. 7 illustrates the case where a bucky device 110a for standing position photography and a bucky device 110b for standing position photography are respectively provided in the photography room R1. The number and type of the bucky devices 110 provided in the are not particularly limited.
Further, in the present embodiment, a configuration in which one radiation generation device 112 is provided corresponding to each Bucky device 110 is illustrated, but for example, one radiation generation device 112 is provided in the imaging room R1. One radiation generating device 112 corresponds to a plurality of the bucky devices 110, and it is also possible to use the device by appropriately moving the position or changing the radiation irradiation direction.

  In addition, a radio access point (base station) 113 or the like that relays communication between the radiographic imaging device 2 and an external device such as the console 101 is provided in the radiographing room R1.

In the present embodiment, a front room R2 is provided adjacent to the photographing room R1.
In this anterior chamber R2, an operator such as a radiologist or doctor controls the tube voltage, tube current, irradiation field stop, etc. of the radiation generator 112 that irradiates the subject with radiation, and operates the bucky device 110, etc. An operation device 114 that is operated when performing the operation is arranged.

The operation device 114 is configured to transmit a control signal for controlling the radiation irradiation conditions of the radiation generator 112 from the console 101.
The radiation irradiation conditions of the radiation generator 112 include, for example, the exposure start / end timing, the value of the radiation tube current, the value of the radiation tube voltage, the filter type, and the like. This radiation irradiation condition is transmitted to the operation device 114. It is set according to the control signal from the console 101.

  An exposure instruction signal for instructing radiation exposure is transmitted from the operation device 114 to the radiation generation apparatus 112, and the radiation generation apparatus 112 delivers predetermined radiation for a predetermined time according to the exposure instruction signal. The irradiation is performed at a predetermined timing.

The console 101 is a computer including a control unit, a storage unit, an input unit, a display unit, a communication unit (all of which are not shown) and the like configured by a CPU or the like.
The console 101 performs various types of image processing on the image data sent from the radiation image capturing apparatus 2 and displays an image based on the image data on the display unit.
In this embodiment, the console 101 is connected to devices such as the HIS / RIS 121, the PACS server 122, and the imager 123 via the network N.

  In the present embodiment, the cradle 4 constitutes a part of the radiographic image capturing system 100, but the illustration thereof is omitted in FIG.

[Charge control by cradle]
Next, an example of charge control by the charge control unit 48 of the cradle 4 will be described with reference to the flowchart of FIG.

First, the charging control unit 48 acquires charging information corresponding to the radiographic imaging device 2 placed on the cradle 4 (step S1).
Specifically, for example, when the bar code reading unit 49 reads the bar code from the bar code sticker 2a attached to the radiographic image capturing apparatus 2 and outputs the bar code to the charge control unit 48, the charging control unit 48 reads the bar code. The identification information of the radiographic imaging device 2 is acquired from the code, and charging information corresponding to the acquired identification information is acquired from the charging information storage area of the storage unit 47.

Next, the charging control unit 48 specifies the maximum applicable voltage V2 based on the acquired charging information, and sets the specified maximum applicable voltage V2 as a target voltage (step S2).
Specifically, for example, the charging control unit 48 calculates the maximum applicable voltage V2 (V2 = V1 + RL × Is) using the rated voltage V1, the path resistance RL, and the charging current Is included in the acquired charging information. The calculated maximum applicable voltage V2 is set as the target voltage.

  Thus, in the present embodiment, the maximum applicable voltage V2 in consideration of the path resistance RL from the battery 28 to the voltage detection unit 43 can be set as the target voltage, so the battery 28, the voltage detection unit 43, It is possible to reduce the influence of the detection error due to the path resistance RL between the battery 28 and the voltage actually applied to the battery 28 at the time of constant current charging closer to the rated voltage V1 of the battery 28. As a result, when shifting from constant current charging to constant voltage charging, the battery 28 can be pulled up to a state as close as possible to the rated voltage V1, and redundancy of constant voltage charging can be avoided and charging can be completed quickly. It becomes possible.

In addition, even if the path resistance RL from the battery 28 to the voltage detection unit 43 increases, the influence can be suppressed. Therefore, the voltage detection unit 43 can be provided outside the radiographic imaging device 2, and the radiographic image can be provided. The imaging device 2 can be reduced in size and thickness.
Furthermore, since it is not necessary to provide a voltage detection unit on the radiographic imaging device 2 side, a connector, a terminal, and the like for transmitting the detection voltage signal from the radiographic imaging device 2 to the charging device side (cradle 4 side) are unnecessary. Further reduction in size and thickness can be achieved, and the heat generation of the radiographic image capturing apparatus 2 during charging is suppressed, so that the function of the radiographic image capturing apparatus 2 becomes unstable or the radiographic image capturing apparatus 2 is It is possible to avoid shortening the lifetime of the component parts.

  In the present embodiment, since the maximum applicable voltage V2 can be specified based on the charging information corresponding to the radiographic imaging device 2 placed on the cradle 4, it is placed on the cradle 4. Charging can be performed with a charging sequence corresponding to the model of the radiation image capturing apparatus 2 and the like.

The radiographic image capturing apparatus 2 has a built-in battery 28 type, specifically, the number of built-in batteries 28, a full charge capacity Cf, a charging characteristic, and the like according to the model of the radiographic image capturing apparatus 2 and the like. The path resistance RL and the like are different up to the voltage detector 43. Therefore, if charging is performed with a constant charging sequence regardless of the type of the radiographic imaging apparatus 2, there may be a problem that the time required for charging increases or charging cannot be performed until full charging. .
On the other hand, as in the present embodiment, charging is performed with a charging sequence corresponding to the model of the radiation image capturing apparatus 2, so that the problem can be avoided and charging can be completed quickly and accurately. .

Next, the charge control unit 48 stores the remaining charge amount of the battery 28 built in the radiographic image capturing apparatus 2 placed on the cradle 4 in the history information storage area of the storage unit 47 (step S3).
Specifically, the charging control unit 48 is built in the radiographic image capturing apparatus 2 based on the voltage detected by the voltage detection unit 43 when the radiographic image capturing apparatus 2 is placed on the cradle 4, for example. The remaining amount of charge of the battery 28 at the start of charging is calculated, the date and time of the calculation point is added to the remaining amount of charge, and the history information in the storage unit 47 is associated with the identification information of the radiation image capturing apparatus 2. Store in the storage area.

Next, the charging control unit 48 stores the number of shots taken from the previous end of charging in the radiation image capturing apparatus 2 placed on the cradle 4 in the history information storage area of the storage unit 47 (step S4).
Specifically, the charge control unit 48 is stored in the storage unit 31 of the radiographic imaging device 2 placed on the cradle 4 via the cradle output connector unit 42 and the device-side connector unit 26, for example. The number of images taken since the end of the previous charging is acquired, the date and time of acquisition is added to the number of images taken, and stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic image capturing device 2 Let

Next, the charge control unit 48 determines whether or not the battery 28 built in the radiographic imaging device 2 placed on the cradle 4 is in an overdischarged state (step S5).
Specifically, the charge control unit 48 detects, for example, an overdischarge of the battery 28 included in the voltage detected by the voltage detection unit 43 when the radiographic imaging device 2 is placed on the cradle 4 and the acquired charging information. The voltage threshold is compared to determine whether the detected voltage is below the overdischarge voltage threshold.

If it is determined in step S5 that the battery is not in an overdischarged state (step S5; No), the charging control unit 48 proceeds to the process of step S8.
Specifically, for example, when the charge control unit 48 determines that the detected voltage does not fall below the overdischarge voltage threshold, the battery 28 built in the radiographic imaging device 2 placed on the cradle 4 is It determines with it not being an overdischarge state, and transfers to the process of step S8.

On the other hand, when it is determined in step S5 that the battery is in an overdischarged state (step S5; Yes), the charging control unit 48 detects excessive battery 28 built in the radiographic imaging device 2 placed on the cradle 4. It is determined whether or not it is repeatedly determined that the battery is in a discharged state (step S6).
Specifically, for example, when the charge control unit 48 determines that the detected voltage is lower than the overdischarge voltage threshold, the battery 28 built in the radiographic imaging device 2 placed on the cradle 4 is overcharged. It is determined that the battery is in the discharge state, the date and time at the time of determination is given to the determination result (overdischarge determination result), and the history information storage area of the storage unit 47 is associated with the identification information of the radiographic imaging device 2 Remember me. The charging control unit 48 is based on the overdischarge determination result stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic imaging device 2 placed on the cradle 4, for example. Then, it is determined whether or not the battery 28 built in the radiographic image capturing apparatus 2 has been repeatedly determined a predetermined number of times (for example, 5 times) as being overdischarged.

If it is determined in step S6 that the overdischarge state has been repeatedly determined (step S6; Yes), the charging control unit 48 stops charging the battery 28, displays an overdischarge error, and outputs it. (Step S7), the process is terminated.
Specifically, for example, when the charge control unit 48 determines that the overdischarge state has been repeatedly determined a predetermined number of times, the battery built in the radiographic imaging device 2 placed on the cradle 4 is incorporated. 28 is stopped and an overdischarge error such as a maintenance error is output.

  Thus, in the present embodiment, the overdischarge state of the battery 28 is determined, and an overdischarge error is output when the number of times determined to be the overdischarge state reaches a predetermined number. Therefore, an overdischarge error can be notified to an operator such as a radiologist or a doctor, and a request for maintenance can be made accurately.

The radiographic image capturing apparatus 2 operates, for example, when the voltage of the battery 28 is 2.2 V or more and 4.0 V or less, and enters the sleep state when the voltage is less than 2.2 V, and when the voltage is 2.1 V or less. The operation is configured to stop completely. While the operation is completely stopped, the voltage of the battery 28 is maintained at 1.9 V or more and 2.1 V or less. However, when the battery 28 is left for a long time, the battery is overdischarged below 1.9 V. there is a possibility. In actual use, 1.9V to 2.1V can be classified as normal, 1.5V to less than 1.9V can be recharged and used.
The overdischarge state of the battery 28 may reduce the performance of the battery 28 to shorten the lifespan thereof, or may cause a malfunction of the radiographic imaging apparatus 2 including the battery 28. When the discharge state occurs repeatedly, it is preferable to maintain or replace the battery 28.
Further, since there is a possibility that an overdischarge state has occurred due to a failure of the battery 28, it is preferable to maintain or replace the battery 28 even in such a case.

By the way, the radiographic imaging apparatus 2 cannot recognize whether or not the battery 28 built in the radiographic imaging apparatus 2 is in an overdischarged state. In addition, when the battery 28 is in an overdischarged state, the radiographic imaging device 2 cannot recognize whether the battery 28 is in a normal state, a cautionary state, or a failure state.
Therefore, as in the present embodiment, the overdischarge state of the battery 28 built in the radiographic imaging device 2 placed on the cradle 4 is determined by the cradle 4, and the overdischarge state is determined. By configuring the system to output an overdischarge error when the number of times reaches a predetermined number, it is possible to notify the operator such as a radiologist or a doctor of the overdischarge error and accurately perform maintenance requests. It becomes.

On the other hand, when it is determined in step S6 that the overdischarge state has not been repeatedly determined (step S6; No), the charge control unit 48 starts outputting (displaying, etc.) the current number of shootable images. (Step S8).
Specifically, the charging control unit 48 is associated with the identification information of the radiographic imaging device 2 placed on the cradle 4 and stored in the history information storage area of the storage unit 47, for example. Using the charge amount of the battery 28 at the time of termination, the remaining charge amount of the battery 28 of this time, and the number of shots taken since the end of the previous charge, the used charge amount S (S = (((previous (The amount of charge of the battery 28 at the end of charging) − (the remaining amount of charge of the battery 28)) / (the number of images taken since the end of the previous charge)), and the calculated date and time are added, The history information storage area of the storage unit 47 is stored in association with the identification information of the radiation image capturing apparatus 2. Then, the charging control unit 48 uses, for example, one shot taken in association with the identification information of the radiographic imaging device 2 placed on the cradle 4 and stored in the history information storage area of the storage unit 47. Based on the average value of the charge amount S and the current charge amount of the battery 28 detected based on the voltage detected by the voltage detection unit 43, the current number of radiographable devices 2 that can be imaged. The process of estimating and outputting is started.
As a result, while the battery 28 is being charged, the number of images that can be taken at the present time is estimated and output at every predetermined timing, so that charging of the battery 28 is started and the charging proceeds and the amount of charge of the battery 28 increases. As a result, the number of images that can be shot at the time of output increases.

  As described above, in the present embodiment, history information including the history of the charge amount of the battery 28 built in the radiation image capturing apparatus 2 and the history of the number of images captured by the radiation image capturing apparatus 2, Since the number of images that can be captured by the radiation image capturing apparatus 2 can be estimated and output based on the current charge amount, an appropriate number of images that can be captured can be notified to an operator such as a radiologist or a doctor. It becomes possible. Thereby, an operator such as a radiologist or a doctor can use the notified number of images that can be taken as an indication of use.

For example, since the charge amount used only for imaging is constant regardless of the usage environment of the radiographic image capturing apparatus 2, the charge amount history of the battery 28 built in the radiographic image capturing apparatus 2 or the radiographic image capturing apparatus It is possible to estimate the number of images that can be photographed at the present time based only on the current charge amount of the battery 28 without considering the history of the number of photographed images by 2.
However, the radiographic image capturing apparatus 2 has different stand-by time that is not used for photographing, photographing intervals, and the like depending on the use environment. For this reason, if the number of shootable images is estimated based only on the current charge amount of the battery 28, an appropriate number of shootable images may not be estimated. Specifically, for example, when the radiographic image capturing apparatus 2 is left unused for a long time after completion of charging and consumes power during that period, it consumes power during that period, and thus more than the estimated number of possible images. The actual number of possible shots may be reduced.
On the other hand, as in the present embodiment, not only the current charge amount of the battery 28 but also the history of the charge amount of the battery 28 built in the radiographic image capturing device 2 and the number of images taken by the radiographic image capturing device 2 In consideration of this history, it is possible to estimate an appropriate number of images that can be taken according to the use environment of the radiographic imaging device 2 by estimating the number of available images.

  In addition, when the current charge amount of the battery 28 is simply displayed and output, there is a problem that it is unclear how many pictures can be taken, but the number of pictures that can be taken is displayed as in the present embodiment. This problem can be avoided by outputting the output.

  Further, in the present embodiment, while the battery 28 is being charged, the current number of images that can be taken is estimated and output at every predetermined timing, so that an operator such as a radiologist or doctor can be charged. It is possible to notify in real time the number of images that can be photographed at present. Therefore, for example, even when the charging of the battery 28 has not reached full charge, when the charging of the battery 28 proceeds and the number of images that can be captured by the radiation image capturing apparatus 2 reaches the number desired by the operator, radiation image capturing is performed. Since the apparatus 2 can be pulled out from the cradle 4 and used for photographing, etc., efficient charging according to the preference of the operator is possible.

Note that, as described above, for example, the charge used per radiographing stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic imaging device 2 placed on the cradle 4 Based on the maximum used charge amount S of the amount S (or an average value of a plurality of upper used charge amounts S when the used charge amounts S per one image are arranged in descending order). The radiographic imaging apparatus 2 can be configured to estimate and output the current number of radiographable images, and is associated with the identification information of the radiographic imaging apparatus 2 placed on the cradle 4. In the case where the minimum used charge amount S (or the used charge amount S per single shot is arranged in descending order) among the used charge amounts S per single shot stored in the history information storage area of the storage unit 47 Subordinate The number of used charge amounts S may be an average value), and the radiographic image capturing apparatus 2 may be configured to estimate and output the current number of radiographable images, Alternatively, both of these can be estimated and output.
In this case, the minimum number of images that can be captured and / or the maximum number of images that can be captured can be estimated and output. Therefore, even if the usage environment of the radiation image capturing apparatus 2 is uneven, an appropriate number of images that can be captured is estimated and output. It becomes possible to do.

Further, as described above, for example, the charge used per one image capturing stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic image capturing apparatus 2 placed on the cradle 4 Based on the latest used charge amount S among the amounts S, it is also possible to estimate and output the current number of radiographable devices 2 that can be imaged.
In this case, since the number of shootable images can be estimated and output based on the latest information, an appropriate number of shootable images can be determined even if the capacity of the battery 28 is reduced due to a change with time of the battery 28 or the like. It is possible to estimate and output.

  In the present embodiment, while the battery 28 is being charged, the current number of shootable images is estimated and output at every predetermined timing. However, the present invention is not limited to this. It is also possible to estimate and output the number of images that can be shot at the current time (at the end of charging) only.

Next, the charging control unit 48 starts charging the battery 28 built in the radiographic imaging device 2 placed on the cradle 4, detects the current voltage change ΔV1 (step S9), and detects it. It is determined whether or not the current voltage change ΔV1 is outside the allowable range (step S10).
Specifically, for example, the charge control unit 48 detects the voltage change ΔV1 between two current values before and immediately after the start of energization at the start of constant current charging of the battery 28 by the voltage detection unit 43, The date and time at the time of detection is added to the voltage change ΔV1 and stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic imaging device 2 placed on the cradle 4. Then, for example, the charge control unit 48 calculates the voltage change ΔV0 (ΔV0 = Is × RL) in the initial state (that is, at the time of factory shipment) using the path resistance RL and the charging current Is included in the acquired charging information. Then, the calculated voltage change ΔV0 in the initial state is compared with the current voltage change ΔV1 detected and stored, and it is determined whether or not the difference between them is outside a predetermined voltage change allowable range. .

If it is determined in step S10 that the current voltage change ΔV1 is not outside the allowable range (step S10; No), the charging control unit 48 proceeds to the process of step S12.
Specifically, for example, the charge control unit 48 compares the calculated voltage change ΔV0 in the initial state with the current voltage change ΔV1 detected and stored, and the difference between the two is a predetermined voltage change. When it is determined that it is not outside the allowable range, the process proceeds to step S12.

On the other hand, when it is determined in step S10 that the current voltage change ΔV1 is outside the allowable range (step S10; Yes), the charging control unit 48 displays and outputs a deterioration error (step S11).
Specifically, for example, the charge control unit 48 compares the calculated voltage change ΔV0 in the initial state with the current voltage change ΔV1 detected and stored, and the difference between the two is a predetermined voltage change. When it is determined that it is outside the allowable range, it is determined that deterioration has occurred in the battery 28 or a path from the battery 28 to the voltage detection unit 43 due to a change with time, and a deterioration error is output.

  Thus, in the present embodiment, the voltage change ΔV0 in the initial state is calculated based on the charging current Is and the path resistance RL included in the acquired charging information, and the current voltage change ΔV1 and the calculated initial state When the difference from the voltage change ΔV0 is outside the allowable voltage change range, the deterioration error can be detected and the deterioration error can be output.

Here, when the charging information including the charging current Is and the path resistance RL cannot be acquired, the deterioration error cannot be detected.
On the other hand, as in this embodiment, the charging information including the charging current Is and the path resistance RL is acquired prior to the charging of the battery 28, the deterioration error is detected, and the deterioration error is output as appropriate. To ensure the safety of charging accurately by notifying the operator such as a radiologist or doctor of the deterioration in the battery 28 and the path from the battery 28 to the voltage detection unit 43 as the battery 28 etc. changes over time. This makes it possible to accurately notify the replacement timing of the battery 28 and the like.
In the present embodiment, when a deterioration error is detected, only the deterioration error is output. However, the present invention is not limited to this. For example, when a deterioration error is detected, the battery 28 is charged. It can also be configured to stop.

Next, the charging control unit 48 calculates the current voltage increase rate (step S12), and determines whether or not the calculated current voltage increase rate is outside the allowable range (step S13).
Specifically, for example, the charge control unit 48 calculates the voltage increase rate of the battery 28 in constant current charging based on the voltage detected by the voltage detection unit 43, and adds the date and time of the calculation time to the voltage increase rate. Then, the information is stored in the history information storage area of the storage unit 47 in association with the identification information of the radiographic imaging device 2 placed on the cradle 4. Then, for example, the charge control unit 48 uses the full charge capacity Cf and the charge current Is included in the acquired charge information to use the voltage increase rate V / T (V / T = V / T = in the initial state). Is / Cf) is calculated, the calculated voltage increase rate V / T in the initial state is compared with the current voltage increase rate calculated and stored, and the difference between the two is determined to be a predetermined voltage increase rate allowable. Determine whether it is out of range.

If it is determined in step S13 that the current voltage increase rate is not outside the allowable range (step S13; No), the charging control unit 48 proceeds to the process of step S15.
Specifically, for example, the charge control unit 48 compares the calculated voltage increase rate V / T in the initial state with the current voltage increase rate calculated and stored, and the difference between the two is determined in advance. If it is determined that the voltage rise rate is not outside the allowable range, the process proceeds to step S15.

On the other hand, when it is determined in step S13 that the current voltage increase rate is outside the allowable range (step S13; Yes), the charging control unit 48 is built in the radiographic imaging apparatus 2 placed on the cradle 4. The charging of the battery 28 is stopped, and a charging error is displayed and output (step S14).
Specifically, for example, the charge control unit 48 compares the calculated voltage increase rate V / T in the initial state with the current voltage increase rate calculated and stored, and the difference between the two is determined in advance. When it is determined that the voltage rise rate is outside the allowable range, the deterioration of the battery 28 built in the radiographic imaging device 2 placed on the cradle 4 or a short circuit inside the battery 28 occurs due to the change over time. It is determined that the battery 28 is charged, and charging of the battery 28 is stopped and a charging error is output.

Thus, in the present embodiment, the voltage increase rate V / T in the initial state of the battery 28 in constant current charging is calculated based on the full charge capacity Cf included in the acquired charging information, and the current voltage increase rate is calculated. When the difference between the calculated voltage increase rate V / T in the initial state is outside the allowable voltage increase rate range, a charging error is detected, and charging of the battery 28 is stopped and a charging error is output. be able to.
Specifically, the capacity of the battery 28 is reduced due to deterioration of the battery 28, and the current voltage increase rate becomes too higher than the voltage increase rate V / T in the initial state, and the difference between the two (= (Current voltage increase rate) − (Voltage increase rate in the initial state)) exceeds the upper limit of the allowable range of voltage increase, or the apparent capacity of the battery 28 due to a short circuit inside the battery 28 or the like. And the current voltage increase rate becomes too lower than the voltage increase rate V / T in the initial state, and the difference between them (= (current voltage increase rate) − (voltage increase rate in the initial state) )) Falls below the lower limit of the allowable voltage increase rate range, it is possible to detect a charging error, stop charging the battery 28 and output a charging error.

Here, when charging information including the full charge capacity Cf and the like cannot be acquired, a charging error cannot be detected.
On the other hand, as in this embodiment, by acquiring the charging information including the full charge capacity Cf and the like prior to charging the battery 28, detecting the charging error, and appropriately stopping the charging of the battery 28, It becomes possible to ensure the safety of charging. In addition, a charging error is detected and a charging error is output as appropriate to notify a radiological engineer, doctor, or other operator of the deterioration of the battery 28 or the short-circuit inside the battery 28 due to changes over time of the battery 28 or the like. Thus, it is possible to accurately ensure the safety of charging, and to accurately notify the replacement timing of the battery 28 and the like.

Next, the charging control unit 48 stops charging the battery 28 in step S14, or the current detected by the current detecting unit 44 becomes equal to or lower than the charging end value Ie in constant voltage charging, and the charging ends. When the charging of the battery 28 built in the radiographic imaging device 2 placed on the cradle 4 is completed, the charging time is stored in the history information storage area of the storage unit 47 (step S15).
Specifically, for example, the charging control unit 48 measures the charging time required from the charging start time to the charging end time of the battery 28, adds the date and time of the charging start time to the charging time, and the cradle 4 Are stored in the history information storage area of the storage unit 47 in association with the identification information of the radiation image capturing apparatus 2 placed on the storage unit 47.

Here, it is also possible to configure to detect the charging error based on the charging time required from the charging start time to the charging end time of the battery 28.
Specifically, for example, when the charging time required from the charging start time to the charging end time of the battery 28 is too long or too short than the scheduled charging time and is outside the predetermined charging time allowable range. It is also possible to configure to output a charging error.
As a result, it is possible to notify the operator such as a radiologist or a doctor of a decrease in the capacity of the battery 28 or a short circuit inside the battery 28 due to a change with time of the battery 28 or the like. This makes it possible to accurately notify the replacement timing of the battery 28 and the like.

  The radiation from the cradle 4 is stopped before the charging of the battery 28 is stopped in step S14 or before the current detected by the current detection unit 44 becomes equal to or lower than the charging end value Ie in the constant voltage charging or before switching from the constant current charging to the constant voltage charging. When the image capturing apparatus 2 is pulled out, the battery 28 is not fully charged, and an accurate charging time, that is, a charging time required when the battery 28 is fully charged cannot be acquired. Therefore, in this case, it is also possible to configure so that the detection of the charging error based on the charging time required from the charging start time to the charging end time of the battery 28 is not performed.

Next, the charging control unit 48 stores the amount of charge of the battery 28 at the end of charging in the history information storage area of the storage unit 47 (step S16), and ends this process.
Specifically, the charge control unit 48 calculates the amount of charge of the battery 28 at the end of charging based on the voltage detected by the voltage detection unit 43 at the end of charge, for example, and calculates the amount of charge at the end of charge. Are added to the history information storage area of the storage unit 47 in association with the identification information of the radiographic image capturing apparatus 2 placed on the cradle 4.

Here, it is also possible to configure to detect a charging error based on the amount of charge of the battery 28 at the end of charging.
Specifically, for example, when the charge amount of the battery 28 at the end of charging is too much or too little than the full charge capacity Cf and is outside a predetermined full charge allowable range, a charge error is indicated. It can also be configured to output.
As a result, it is possible to notify the operator such as a radiologist or a doctor of a decrease in the capacity of the battery 28 or a short circuit inside the battery 28 due to a change with time of the battery 28 or the like. This makes it possible to accurately notify the replacement timing of the battery 28 and the like.

  The radiation from the cradle 4 is stopped before the charging of the battery 28 is stopped in step S14 or before the current detected by the current detection unit 44 becomes equal to or lower than the charging end value Ie in the constant voltage charging or before switching from the constant current charging to the constant voltage charging. When the image capturing device 2 is pulled out, the battery 28 is not fully charged. In this case, the charging error is not detected based on the charge amount of the battery 28 at the end of charging. It is also possible to configure.

  Further, the current voltage change ΔV1 stored in the history information storage area of the storage unit 47, the current voltage increase rate V / T, the charging time required from the charging start time to the charging end time of the battery 28, and the charging end time It is also possible to estimate and output the replacement time of the battery 28 based on at least one of the charge amount of the battery 28 in FIG.

  According to the cradle 4 and the radiation image detection system 1 as the charging device according to the present embodiment described above, the cradle 4 is used until the voltage of the battery 28 as the power storage body detected by the voltage detection unit 43 reaches the target voltage. It is configured to perform constant current charging and to switch to constant voltage charging when the voltage of the battery 28 reaches a target voltage. And the cradle 4 acquires the charging information corresponding to the radiographic imaging device 2 as an electronic device incorporating the battery 28 as charging information related to the charging of the battery 28, and can be applied at the maximum based on the acquired charging information. The voltage V2 is specified and set as a target voltage. Note that the charging information includes information on the maximum applicable voltage V2 in consideration of the path resistance RL from the battery 28 to the voltage detection unit 43.

  That is, since the maximum applicable voltage V2 in consideration of the path resistance RL from the battery 28 to the voltage detection unit 43 can be set as the target voltage, detection by the path resistance RL between the battery 28 and the voltage detection unit 43. It is possible to reduce the influence of errors. As a result, the transition from constant current charging to constant voltage charging at a voltage lower than planned is avoided, and the time required for charging can be shortened.

In addition, even if the path resistance RL from the battery 28 to the voltage detection unit 43 is increased, the influence can be suppressed. Therefore, the voltage detection is not performed on the cradle 4 side without providing the voltage detection unit on the radiation imaging apparatus 2 side. Since the portion 43 can be provided, the radiographic imaging apparatus 2 can be reduced in size and thickness.
Furthermore, by not providing the voltage detection unit on the side of the radiographic image capturing device 2, a connector, a terminal and the like for transmitting the detection voltage signal from the radiographic image capturing device 2 to the cradle 4 side become unnecessary. It becomes possible to further reduce the size and thickness.

  In addition, since the maximum applicable voltage V2 can be specified based on the charging information corresponding to the radiographic imaging device 2 placed on the cradle 4, the radiographic imaging device 2 placed on the cradle 4 can be identified. Charging can be performed with a charging sequence according to the model. Therefore, since charging can be performed efficiently and accurately regardless of the type of the battery 28 built in the radiographic imaging device 2 placed on the cradle 4, it is possible to complete charging quickly and accurately. It becomes.

  Moreover, according to the cradle 4 and the radiographic image detection system 1 as the charging device according to the present embodiment described above, the cradle 4 includes identification information for identifying the radiographic image capturing device 2 and the radiographic image capturing device 2. The storage unit 47 is provided as a charging information storage unit that stores charging information related to charging of the battery 28 built in the battery 28 in association with each other. And the identification information for identifying the said radiographic imaging device 2 is acquirable from the radiographic imaging device 2, The cradle 4 acquires identification information from the radiographic imaging device 2, The acquired identification information The charging information corresponding to is acquired from the storage unit 47.

  Therefore, it is possible to accurately acquire the charging information corresponding to the radiographic imaging device 2 placed on the cradle 4.

  Further, according to the cradle 4 and the radiation image detection system 1 as the charging device according to the present embodiment described above, the charging information includes information on the full charge capacity Cf of the battery 28. Based on the full charge capacity Cf included in the acquired charging information, the voltage increase rate V / T in the initial state of the battery 28 in constant current charging is calculated, and the current voltage is calculated based on the detection voltage of the voltage detector 43. When the difference between the calculated current voltage increase rate and the calculated voltage increase rate V / T in the initial state is outside the predetermined voltage increase rate allowable range, the battery 28 is charged. Is configured to stop.

  Therefore, the charging information including the full charge capacity Cf and the like is acquired, the charging error is detected, and the charging of the battery 28 can be stopped as appropriate, so that the charging safety can be ensured.

  In addition, according to the cradle 4 and the radiation image detection system 1 as the charging device according to the present embodiment described above, the cradle 4 includes the calculated current voltage increase rate and the calculated initial voltage increase rate V /. When the difference from T falls outside the predetermined voltage increase rate allowable range, a charging error is output.

  Therefore, it is possible to acquire charging information including the full charge capacity Cf, detect a charging error, and output a charging error as appropriate, so that an operator such as a radiologist or doctor can change the battery 28 and the like over time. As a result, it is possible to notify the deterioration of the battery 28, the short circuit inside the battery 28, and the like, and it is possible to accurately ensure the safety of charging and to accurately notify the replacement timing of the battery 28 and the like. Become.

  Further, according to the cradle 4 and the radiological image detection system 1 as the charging device according to the present embodiment described above, the cradle 4 includes the charge amount history of the battery 28 built in the radiographic image capturing device 2, A storage unit 47 is provided as history information storage means for storing history information including the history of the number of shots taken by the radiation image capturing apparatus 2. Then, the cradle 4 determines the number of images that can be taken by the radiographic imaging device 2, the history information of the radiographic imaging device 2 stored in the storage unit 47, and the battery 28 built in the radiographic imaging device 2. The estimation is based on the current charge amount, and the estimated number of shootable images is output.

  Therefore, not only the current charging amount of the battery 28 but also the charging amount history of the battery 28 built in the radiographic image capturing device 2 and the history of the number of images taken by the radiographic image capturing device 2 can be taken into consideration. Since the number of images can be estimated, it is possible to estimate an appropriate number of images that can be captured according to the use environment of the radiation image capturing apparatus 2.

  Further, according to the cradle 4 and the radiation image detection system 1 as the charging device according to the present embodiment described above, the cradle 4 determines the overdischarge state of the battery 28 and the number of times determined to be the overdischarge state. Is configured to output an overdischarge error when the predetermined number of times is reached.

  Therefore, the cradle 4 determines the overdischarge state of the battery 28 built in the radiographic imaging apparatus 2 and outputs an overdischarge error when the number of times determined to be the overdischarge state reaches a predetermined number. Therefore, it is possible to notify an operator such as a radiologist or doctor of an overdischarge error and make a request for maintenance or the like.

  Needless to say, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.

In the above-described embodiment, the change between the two values of the charge current at the start of constant current charging (change in which the charge current rises from 0 to Is) is executed only once, but the present invention is not limited to this. For example, as shown in FIG. 9B, the change in the charging current between two values may be repeated a plurality of times. In the example of FIG. 9B, the charging current is raised, lowered, and raised three times in total.
Then, as shown in FIGS. 9A and 9C, all the voltage changes ΔV11, ΔV12, ΔV13 corresponding to the state changes of the respective charging currents are detected, and the average value thereof is also set as the voltage change ΔV1. Good.

  Moreover, in the said embodiment, the identification information for identifying the said radiographic imaging apparatus 2 is acquired from the radiographic imaging apparatus 2 mounted in the cradle 4, and the charging information corresponding to the acquired identification information is memory | storage part The charging information corresponding to the radiographic image capturing apparatus 2 is acquired by acquiring the charging information from the charging information storage area 47, but the present invention is not limited to this. For example, the charging information storage area of the storage unit 47 In addition, identification information for identifying the type of the battery 28 built in the radiographic imaging apparatus 2 and charging information related to charging of the battery 28 built in the radiographic imaging apparatus 2 are stored in association with each other. In addition, the type of the battery 28 built in the radiographic imaging device 2 is identified from the radiographic imaging device 2 placed on the cradle 4. By acquiring the identification information for performing the acquisition, and acquiring the charging information corresponding to the acquired identification information from the charging information storage area of the storage unit 47, it corresponds to the type of the battery 28 built in the radiographic imaging apparatus 2. It can also be configured to acquire charging information.

  Further, identification information for identifying the radiographic imaging device 2 and the type of the battery 28 built in the radiographic imaging device 2 are identified from the radiographic imaging device 2 placed on the cradle 4. It is also possible to configure to acquire charging information related to charging of the battery 28 built in the radiation image capturing apparatus 2 instead of the identification information for the purpose. In this case, even if charging information is not stored in the storage unit 47, charging information corresponding to the radiation image capturing apparatus 2 can be acquired.

Further, the charging information and the history information may be stored in the storage unit 31 of the radiographic imaging apparatus 2 or the like instead of the storage unit 47 or in addition to the storage unit 47. In this case, the charging control unit 48 of the cradle 4 communicates with the radiographic imaging device 2 via, for example, the cradle output connector unit 42 and the device-side connector unit 26, and communicates with the storage unit 31 and the like of the radiographic imaging device 2. It is also possible to configure to acquire stored charging information and history information.
In addition, the charging information and the history information may be stored in an external device such as the console 101. In this case, the charging control unit 48 of the cradle 4 can be configured to communicate with an external device such as the console 101 to acquire charging information and history information stored in the external device. .

  Moreover, in the said embodiment, although the radiographic imaging device 2 was illustrated as an electronic device and the cradle 4 was illustrated as a charging device, it is not limited to this, An electronic device is an apparatus which can be charged with a charging device. If it is, if it is an apparatus which can charge an electronic device, it is arbitrary.

1 Radiation image detection system 2 Radiation imaging equipment (electronic equipment)
4 Cradle (charging device)
21 Housing 26 Device side connector (connector)
28 Battery (power storage unit)
30 Main body control unit (function unit)
31 Storage unit (function unit)
32 Scanning drive circuit (functional part)
33 Signal readout circuit (functional part)
34 Signal processing part (functional part)
35 Communication Department (Function Department)
40 A / D converter (functional part)
41 AC / DC constant voltage power supply (power supply)
42 Cradle output connector (connector)
43 Voltage detection unit 44 Current detection unit 47 Storage unit (charging information storage unit, history information storage unit)
48 charge control unit (acquisition means, calculation means, charge error output means, estimation means, shootable number output means, determination means, overdischarge error output means)
49 Barcode reading unit (acquisition means)
Cf Fully charged capacity RL Path resistance V2 Maximum applicable voltage

Claims (5)

In the charging device that charges the power storage unit from the outside of the housing through a connector provided between the electronic devices incorporating the power storage unit that supplies power to each functional unit inside the housing,
A power supply unit for supplying power for charging the power storage unit;
A voltage detection unit for detecting a voltage of the power storage unit;
A current detector for detecting a charging current flowing through the power storage unit;
A charge control unit that performs constant current charging until the voltage of the power storage unit detected by the voltage detection unit reaches a target voltage, and switches to constant voltage charging when the voltage of the power storage unit reaches the target voltage;
As the charging information related to the charging of the power storage unit, the electronic device incorporating the power storage unit or acquisition means for acquiring charging information corresponding to the type of the power storage unit,
The charging information includes information on a maximum applicable voltage in consideration of a path resistance from the power storage unit to the voltage detection unit and information on a full charge capacity of the power storage unit ,
Based on the full charge capacity included in the charging information acquired by the acquiring means, comprising a calculating means for calculating a voltage increase rate of the power storage unit in the constant current charging,
The charge controller is
Based on the charging information acquired by the acquisition means, specify the maximum applicable voltage, set as the target voltage ,
A current voltage increase rate is calculated based on the detected voltage of the voltage detection unit, and a difference between the calculated current voltage increase rate and the voltage increase rate calculated by the calculating means is outside a predetermined allowable range. In such a case, the charging device stops charging of the power storage unit. Charging error output means for outputting a charging error when a difference between the current voltage increase rate calculated by the charge control unit and the voltage increase rate calculated by the calculation means is outside the predetermined allowable range; charging device according to claim 1, characterized in that it comprises. In the charging device that charges the power storage unit from the outside of the housing through a connector provided between the electronic devices incorporating the power storage unit that supplies power to each functional unit inside the housing,
A power supply unit for supplying power for charging the power storage unit;
A voltage detection unit for detecting a voltage of the power storage unit;
A current detector for detecting a charging current flowing through the power storage unit;
A charge control unit that performs constant current charging until the voltage of the power storage unit detected by the voltage detection unit reaches a target voltage, and switches to constant voltage charging when the voltage of the power storage unit reaches the target voltage;
As the charging information related to the charging of the power storage unit, the electronic device incorporating the power storage unit or acquisition means for acquiring charging information corresponding to the type of the power storage unit,
The charging information includes information on a maximum applicable voltage in consideration of a path resistance from the power storage unit to the voltage detection unit,
The charging control unit specifies the maximum applicable voltage based on the charging information acquired by the acquiring unit, sets the target voltage as the target voltage,
The electronic device is a radiographic imaging device that performs radiographic imaging,
History information storage means for storing history information including a history of the charge amount of the power storage unit incorporated in the radiographic image capturing device, and a history of the number of images taken by the radiographic image capturing device,
The number of images that can be captured by the radiographic image capturing device includes the history information of the radiographic image capturing device stored in the history information storage unit, and the current charge amount of the power storage unit built in the radiographic image capturing device. And an estimation means for estimating based on
A shootable number output means for outputting the shootable number of sheets estimated by the estimation means;
Charging device you comprising: a. Determining means for determining an overdischarge state of the electric storage body;
Overdischarge error output means for outputting an overdischarge error when the number of times determined to be an overdischarge state by the determination means reaches a predetermined number of times;
Charging device according to claim 1, wherein any one of claims 3 to be provided with. A radiographic imaging device that houses a power storage unit that supplies power to each functional unit inside the housing, and the radiographic imaging device from the outside of the housing to the power storage unit through a connector provided between the radiographic imaging device. In a radiation image detection system comprising: a charging device that performs charging;
The charging device, the radiation image detecting system that is characterized in that claim 1 is a charging device according to any one of claims 4.

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