Output device

Abstract

Provided are a processing device and an output device, the processing device being built into the output device which uses a DA converter to output a predetermined voltage value serving as a reference.　A processing device 100 is built into an output device 1 which uses a DA converter 16 to output a predetermined voltage value serving as a reference, the processing device 100 comprising: an input voltage acquisition unit 101 which acquires a positive reference voltage value and a negative reference voltage value output, as internal reference voltage values, from an internal power supply 11 in the output device 1; an output voltage acquisition unit which acquires a positive output voltage value and a negative output voltage value output from the DA converter 16; and an adjustment unit 103 which adjusts a set value of the DA converter 16 and adjusts the acquired positive output voltage value and negative output voltage value toward the acquired positive reference voltage value and negative reference voltage value.

Description

Processing device and output device

[0001] The present invention relates to a processing device and an output device.

[0002] Japan is a world leader in the challenges of a declining birthrate, aging population, and population decline, and issues related to maintaining public services such as medical infrastructure are becoming increasingly apparent. These issues require solutions using advanced sensors. For example, in recent years, social issues such as disease testing and non-destructive testing have required sensors with precision in the microvolt range rather than the millivolt range, and there is a demand for highly accurate measurement of signals several orders of magnitude smaller. As an example of a device capable of measuring with such precision, a measurement circuit for measuring power supply noise generated within a semiconductor device has been proposed (see Patent Document 1).

[0003] JP 2015-135284 A

[0004] In a device that requires high accuracy, such as that described in Patent Document 1, changes in performance and electrical characteristics occur due to aging and usage conditions. Such changes can lead to measurement errors or malfunctions, so it is necessary to ensure the reliability of the device as appropriate.

[0005] On the other hand, to ensure the reliability of higher-precision equipment, it is necessary to calibrate the target equipment against the primary standard and adjust for deviations. It is also preferable to improve accuracy by adjusting for errors specific to the target equipment.

[0006] The present invention has been made in view of the above points, and has as its object to provide a processing device and an output device that are capable of improving accuracy by adjusting errors inherent in the device.

[0007] The present invention relates to a processing device incorporated into an output device that outputs a predetermined reference voltage value using a DA converter, and includes: an input voltage acquisition unit that acquires a positive reference voltage value and a negative reference voltage value that are output as internal reference voltage values ​​from an internal power supply in the output device; an output voltage acquisition unit that acquires a positive output voltage value and a negative output voltage value that are output from the DA converter; and an adjustment unit that adjusts the setting value of the DA converter, adjusting the positive output voltage value and the negative output voltage value toward the acquired positive reference voltage value and the negative reference voltage value.

[0008] In addition, it is preferable that the processing device further includes a notification unit that notifies the outside of the adjustment result adjusted by the adjustment unit, the input voltage acquisition unit acquires a positive target voltage value and a negative target voltage value that are output from the target device to be adjusted and are assumed to be the same voltage value as the internal reference voltage value, and the adjustment unit adjusts the positive output voltage value and the negative output voltage value toward the acquired positive target voltage value and negative target voltage value.

[0009] The processing device may further include a conversion unit that converts the adjustment result into a measurement value of a target voltage value output from the target device, and the notification unit may notify the converted measurement value.

[0010] The processing device may further include a conversion unit that converts the adjustment result into a calibration value for calibrating the target voltage value output from the target device, and the notification unit may notify the converted calibration value.

[0011] The processing device may further include a temperature acquisition unit that acquires the temperature of the surrounding atmosphere, and the adjustment unit may adjust the setting value of the DA converter based on the positive reference voltage value, the negative reference voltage value, and the acquired temperature.

[0012] In addition, the input voltage acquisition unit may acquire a reference calibration voltage value for calibrating the internal reference voltage value provided from outside the output device, and the adjustment unit may adjust the positive output voltage value and the negative output voltage value toward the reference calibration voltage value by adjusting the setting value of the DA converter.

[0013] The adjustment section may change the adjustment result based on a voltage value that is set in advance as the output value of the DA converter.

[0014] The present invention also relates to an output device comprising: a processing device as described above; the internal power supply; an inverting circuit that inverts the positive and negative polarities of the internal power supply; an input terminal used to input a voltage value from the outside; an output terminal used to output a voltage value to the outside; and a DA converter that outputs a predetermined voltage value to the output terminal, the DA converter being adjustable by an adjustment value determined based on adjustment by the adjustment unit.

[0015] The present invention also relates to a program that causes a computer to function as a processing device incorporated in an output device that uses a DA converter to output a predetermined reference voltage value, the program causing the computer to function as an input voltage acquisition unit that acquires a positive reference voltage value and a negative reference voltage value that are output as internal reference voltage values ​​from an internal power supply in the output device, an output voltage acquisition unit that acquires a positive output voltage value and a negative output voltage value that are output from the DA converter, and an adjustment unit that adjusts the setting value of the DA converter to adjust the positive output voltage value and the negative output voltage value toward the acquired positive reference voltage value and the negative reference voltage value.

[0016] The present invention can provide a processing device and an output device that can improve accuracy by adjusting for errors inherent in the device.

[0017] Fig. 1 is a schematic diagram showing connections of an output device according to an embodiment of the present invention. Fig. 2 is a block diagram showing the configuration of an output device according to a first embodiment. Fig. 3 is a block diagram showing the configuration of an output device according to a second embodiment of the present invention. Fig. 4 is a schematic diagram showing connections of output devices according to a third embodiment of the present invention. Fig. 5 is a block diagram showing the configuration of an output device according to the third embodiment.

[0018] An output device 1 and a processing device 100 according to each embodiment of the present invention will be described below with reference to FIGS. 1 to 5. First, an overview of the output device 1 will be described. In the following embodiments, "calibration" refers to identifying a deviation (error) in the value of a signal output by a device relative to a reference value. Furthermore, "adjustment" refers to removing the deviation identified by "calibration" and adjusting the output signal of a device (e.g., the target device 200 described below) to the reference value. Furthermore, "toward" includes the concepts of adjusting and approaching a target voltage value, bringing a value closer to the same value, and matching values. In the following embodiments, "voltage value" may refer to either an analog voltage or a digital voltage value (voltage data).

[0019] The output device 1 is a device that can measure highly accurate values ​​by being calibrated and adjusted using a primary standard or a secondary standard that has traceability to the primary standard. The output device 1 can measure highly accurate voltages, for example, by having the measurable voltage adjusted by the primary standard.

[0020] Furthermore, the output device 1 can provide a signal for adjusting a device (for example, the target device 200 in the following embodiment) to the target device 200 by outputting a signal serving as a reference for adjustment to the outside. The output device 1 can provide a voltage for adjusting the target device 200 by outputting, for example, a signal of a reference voltage of 1 mV DC.

[0021] In particular, the output device 1 according to the following embodiment aims to further improve accuracy by identifying errors caused by factors specific to the device and adjusting the internal circuitry. Specifically, the output device 1 aims to further improve accuracy by suppressing the influence of thermoelectric power generated in the internal circuitry by using positive and negative voltage values. A processing device 100 is incorporated into the output device 1, which outputs a predetermined reference voltage value using a DA converter 16. In the following embodiments, the configurations of the output device 1 and the processing device 100 that realize these will be described.

[0022] [First Embodiment] Next, an output device 1 and a processing device 100 according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. The output device 1 according to this embodiment outputs a voltage value to be adjusted to a target device 200 that is the adjustment target, using an internal power supply 11 provided inside the output device 1. The output device 1 includes a processing device 100, the internal power supply 11, an input terminal 12, an inverting circuit 13, an output terminal 14, an AD converter 15, and a DA converter 16.

[0023] The processing device 100 is, for example, a processor such as a CPU. The configuration of the processing device 100 will be described later.

[0024] The internal power supply 11 is a power supply that outputs a predetermined voltage value, and is, for example, a reference voltage IC or the like that has a small change over time and a small temperature coefficient.

[0025] The inverting circuit 13 is a circuit that inverts the voltage value output from the internal power supply 11. The inverting circuit 13 is connected to a switching circuit 20 that can switch between the output of the internal power supply 11 and the output of the inverting circuit 13, for example, as shown in FIG.

[0026] The input terminal 12 is a terminal used to input a voltage value from the outside, and is used as a connection terminal to an external device, for example.

[0027] The output terminal 14 is a terminal used to output a voltage value to an external device, for example.

[0028] The AD converter 15 converts the input voltage value into a digital value and outputs the digital value. The AD converter 15 performs AD conversion on, for example, an input value from a connection terminal or an output value from a DA converter 16 (described later).

[0029] The DA converter 16 outputs a predetermined voltage value to the output terminal 14. The DA converter 16 outputs, for example, a predetermined voltage value to the output terminal 14. The DA converter 16 outputs the predetermined voltage value based on, for example, a set value output from the processing device 100 described below.

[0030] Next, a description will be given of the processing device 100. The processing device 100 includes an input voltage acquisition unit 101, an output voltage acquisition unit 102, an adjustment unit 103, a conversion unit 104, and a notification unit 105, as shown in FIG.

[0031] The input voltage acquisition unit 101 is realized, for example, by the operation of a CPU. The input voltage acquisition unit 101 acquires a positive reference voltage value and a negative reference voltage value output as internal reference voltage values ​​from the internal power supply 11 in the output device 1, and also acquires a positive target voltage value and a negative target voltage value output from the adjustment target device 200, which are assumed to have the same voltage values ​​as the internal reference voltage values. The input voltage acquisition unit 101 acquires, for example, voltage values ​​converted by the AD converter 15. The input voltage acquisition unit 101 acquires, for example, a positive reference voltage value output directly from the internal power supply 11 and a negative reference voltage value output from the inverter circuit 13. The input voltage acquisition unit 101 also acquires, for example, the positive target voltage value and the negative target voltage value from the adjustment target device connected to the input terminal 12.

[0032] The output voltage acquiring unit 102 is realized, for example, by the operation of a CPU. The output voltage acquiring unit 102 acquires the positive output voltage value and the negative output voltage value output from the DA converter 16. For example, the output voltage acquiring unit 102 acquires the output of the DA converter 16 connected to the output terminal 14 via the AD converter 15.

[0033] The adjustment unit 103 is realized, for example, by the operation of a CPU. The adjustment unit 103 adjusts the setting value of the DA converter 16 to adjust the positive and negative output voltage values ​​toward the acquired positive and negative reference voltage values, and also adjusts the positive and negative output voltage values ​​toward the acquired positive and negative target voltage values. The adjustment unit 103 adjusts the positive and negative output voltage values ​​toward the positive and negative reference voltage values, for example, by adjusting the DAC value of the DA converter 16. Here, the adjustment unit 103 adjusts (matches) the output value (voltage value) of the DA converter 16, which is the value converted by the AD converter 15, to the value converted by the AD converter 15 from the output value (voltage value) of the internal power supply 11. This makes it possible to cancel the characteristics of the AD converter 15, which are prone to change due to ambient temperature or changes over time, during adjustment. That is, the accuracy of adjustment can be improved compared to when the digital value converted by the AD converter 15 (for example, the digital value of the voltage value of the internal power supply 11) is used as is for adjusting the DA converter 16. By this adjustment, the adjustment unit 103 can match the voltage value output from the DA converter 16 to the reference voltage value.

[0034] Furthermore, the adjustment unit 103 adjusts the positive and negative output voltage values ​​toward the positive and negative target voltage values, for example, by adjusting the DAC value of the DA converter 16. Here, the adjustment unit 103 adjusts (matches) the output value (voltage value) of the DA converter 16 converted by the AD converter 15 to the value obtained by converting the output value (voltage value) of the target device 200 by the AD converter 15. This allows the characteristics of the AD converter 15, whose AD conversion characteristics are prone to change due to ambient temperature or aging, to be canceled during adjustment. In other words, the adjustment accuracy can be improved compared to when the digital value converted by the AD converter 15 (e.g., the digital value of the voltage value of the target device 200) is used directly to adjust the DA converter 16. Through this adjustment, the adjustment unit 103 can obtain the deviation of the target voltage value from the reference voltage value as the adjustment result.

[0035] The conversion unit 104 is realized, for example, by the operation of a CPU. The conversion unit 104 converts the adjustment result into a measurement value of the target voltage value output from the target device. For example, the conversion unit 104 uses the adjustment result to calculate the following: Measurement value = voltage value of internal power supply × (positive target voltage value - negative target voltage value) / (positive reference voltage value - negative reference voltage value). As a result, the conversion unit 104 calculates the voltage value (target voltage value) currently output from the target device 200 relative to the accurate reference voltage value. In other words, the conversion unit 104 calculates the voltage value output from the target device 200 using the reference voltage value as a reference. The voltage value of the internal power supply 11 is, for example, the "voltage value of the internal power supply" obtained in advance by connecting to the reference calibration equipment 300 (see FIG. 5).

[0036] Furthermore, the conversion unit 104 converts the adjustment result into a calibration value for the target voltage value output from the target device. For example, using the adjustment result, the conversion unit 104 calculates the following: Calibration value = predetermined voltage value × voltage value of internal power supply / ((positive reference voltage value - negative reference voltage value) / 2). This allows the conversion unit 104 to calculate a voltage value (e.g., the positive output voltage value of a DA converter; i.e., the voltage value that should be set in the target device 200 to output an accurate positive target voltage value) to calibrate the current voltage value (target voltage value) output from the target device 200 with respect to the accurate reference voltage value. Note that by using (positive reference voltage value - negative reference voltage value) in the calculation, the thermoelectromotive force of the internal power supply and the thermal resistance of the wiring can be offset. Also, by calculating (positive target voltage value - negative target voltage value), the thermal resistance of the wiring connected to the target device 200 can be offset.

[0037] The notification unit 105 is realized, for example, by the operation of a CPU. The notification unit 105 notifies the outside of the adjustment result obtained by adjusting the acquired positive output voltage value and the negative output voltage value toward the acquired positive reference voltage value and the negative reference voltage value. The notification unit 105 notifies, for example, the measurement value or the calibration value converted by the conversion unit 104 as the adjustment result. The notification unit 105 outputs, for example, the measurement value or the calibration value to a display device such as a display.

[0038] Next, a description will be given of the operations of the output device 1 and the processing device 100. First, the target device 200 is connected to the input terminal 12.

[0039] Next, the AD converter 15 AD-converts the positive reference voltage value and the negative reference voltage value output from the internal power supply 11. Next, the input voltage acquisition unit 101 acquires the AD-converted positive reference voltage value and the negative reference voltage value. Next, the output voltage acquisition unit 102 acquires the positive output voltage value and the negative output voltage value output from the DA converter 16 via the AD converter 15. Next, the adjustment unit 103 adjusts the DA converter 16 to adjust the positive output voltage value and the negative output voltage value toward the positive reference voltage value and the negative reference voltage value. In this way, the adjustment unit 103 brings the positive output voltage value and the negative output voltage value output from the DA converter 16 closer to the positive reference voltage value and the negative reference voltage value.

[0040] Next, the AD converter 15 AD-converts the positive target voltage value and the negative target voltage value output from the target device 200. Next, the input voltage acquisition unit 101 acquires the AD-converted positive target voltage value and the negative target voltage value. Next, the output voltage acquisition unit 102 acquires the positive output voltage value and the negative output voltage value output from the DA converter 16 via the AD converter 15. Next, the adjustment unit 103 adjusts the DA converter 16 to adjust the positive output voltage value and the negative output voltage value toward the positive target voltage value and the negative target voltage value. As a result, the adjustment unit 103 obtains the deviation of the positive output voltage value and the negative output voltage value from the positive reference voltage value and the negative reference voltage value as the adjustment result.

[0041] Next, the conversion unit 104 calculates, from the adjustment result, a calibration value or a measurement value of the target voltage value output from the target device 200. Next, the notification unit 105 outputs the calculated calibration value or measurement value.

[0042] Next, the program of this embodiment will be described. Each component included in the processing device 100 can be realized by hardware, software, or a combination of these. Here, "realized by software" means that the component is realized by a computer reading and executing the program.

[0043] The program can be stored and supplied to a computer using various types of non-transitory computer-readable media. Non-transitory computer-readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-RWs, and semiconductor memories (e.g., mask ROMs, programmable ROMs (PROMs), erasable PROMs (EPROMs), flash ROMs, and random access memories (RAMs)). The display program may also be supplied to a computer by various types of transitory computer-readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The transitory computer-readable media can supply the program to a computer via a wired communication path such as an electric wire or optical fiber, or via a wireless communication path.

[0044] The data transmitter 1 and the processing device 100 according to the first embodiment described above have the following advantages: (1) The processing device 100 is incorporated in the data transmitter 1, which outputs a predetermined reference voltage value using the DA converter 16, and includes an input voltage acquisition unit 101 that acquires a positive reference voltage value and a negative reference voltage value output as internal reference voltage values ​​from the internal power supply 11 in the data transmitter 1, and acquires a positive target voltage value and a negative target voltage value that are assumed to be the same as the internal reference voltage value and are output from the target device 200 to be adjusted, an output voltage acquisition unit 102 that acquires a positive output voltage value and a negative output voltage value output from the DA converter 16, an adjustment unit 103 that adjusts the setting value of the DA converter 16 to adjust the acquired positive output voltage value and the negative output voltage value toward the acquired positive reference voltage value and the negative reference voltage value, and adjusts the positive output voltage value and the negative output voltage value toward the acquired positive target voltage value and the negative target voltage value, and a notification unit 105 that notifies an external device of the adjustment result. By adjusting the positive and negative voltage values, the influence of thermoelectric power on the target voltage value and the reference voltage value can be suppressed, thereby adjusting for the inherent error of the device and improving accuracy.

[0045] (2) The processing device 100 includes the internal power supply 11, an inverting circuit 13 that inverts the positive and negative polarities of the internal power supply 11, an input terminal 12 used to input a voltage value from an external source, an output terminal 14 used to output a voltage value to an external source, and a DA converter 16 that outputs a predetermined voltage value to the output terminal 14, the DA converter 16 being capable of adjusting the DAC value based on adjustment by an adjustment unit 103. Generally, the AD conversion characteristics of the AD converter 15 are susceptible to change due to ambient temperature and aging. Therefore, if the conversion result itself is used as the operating standard, errors are likely to occur in the resulting output voltage and measured read voltage. In contrast, in the processing device 100, the adjustment unit 103 simply compares the two voltages, so the performance of the comparator is maintained even if the AD conversion characteristics change. This allows the output device 1 to adjust for device-specific errors and improve accuracy.

[0046] (3) The processing device 100 further includes a conversion unit 104 that converts the adjustment result into a measurement value of the target voltage value output from the target device 200, and the notification unit 105 notifies the converted measurement value. The processing device 100 also includes a conversion unit 104 that converts the adjustment result into a calibration value for calibrating the target voltage value output from the target device 200, and the notification unit 105 notifies the converted calibration value. This makes it possible to easily check the measurement value and the calibration value.

[0047] Second Embodiment Next, an output device 1 and a processing device 100 according to a second embodiment of the present invention will be described with reference to FIG. 3. In describing the second embodiment, the same components as those in the previous embodiment will be denoted by the same reference numerals, and their description will be omitted or simplified. The output device 1 and the processing device 100 according to the second embodiment differ from the first embodiment in that the output value of the output device 1 itself is adjusted using its own internal power supply 11.

[0048] The data output device 1 and the processing device 100 according to the second embodiment differ from the first embodiment in that they further include a temperature acquisition unit 106. The data output device 1 and the processing device 100 according to the second embodiment differ from the first embodiment in that the adjustment unit 103 adjusts the setting value of the DA converter 16 based on the positive reference voltage value, the negative reference voltage value, and the acquired temperature.

[0049] The temperature acquisition unit 106 is realized by, for example, the operation of the CPU. The temperature acquisition unit 106 acquires the temperature of the DA converter 16.

[0050] The adjustment unit 103 adjusts the setting value of the DA converter 16 so that the positive reference voltage value and the negative reference voltage value move toward the positive output voltage value and the negative output voltage value. The adjustment unit 103 also adjusts the setting value of the DA converter 16 using the acquired temperature. The adjustment unit 103 adjusts the setting value of the DA converter 16 so that, for example, the following equation is satisfied: Positive output voltage value = Predetermined voltage value / Positive reference voltage value × (Positive reference voltage value - Negative reference voltage value) / 2 + Temperature correction term. The temperature correction term is configured as a function with temperature as a variable. For example, it may be implemented as a linear expression with temperature as a variable.

[0051] Next, the operation of the output device 1 and the processing device 100 will be described. First, the DA converter 16 performs DA conversion on the positive and negative reference voltages of the internal power supply 11. Next, the temperature acquisition unit 106 acquires the temperature. Next, the adjustment unit 103 adjusts the setting value of the DA converter 16 so as to adjust from the positive and negative reference voltages toward positive and negative output voltages. Next, the output voltage acquisition unit 102 acquires the positive and negative output voltages. Next, the adjustment unit 103 calculates a temperature correction term based on the temperature change and adjusts the setting value of the DA converter 16.

[0052] The output device 1 and processing device 100 according to the second embodiment described above have the following advantages: (3) The processing device 100 further includes a temperature acquisition unit 106 that acquires the temperature of the DA converter 16, and the adjustment unit 103 adjusts the setting value of the DA converter 16 based on the positive reference voltage value, the negative reference voltage value, and the acquired temperature. The DA converter 16 has a less complex configuration than the AD converter 15 and is therefore less susceptible to temperature changes and changes over time. However, if even slight changes in characteristics due to temperature changes cannot be ignored, it is possible to further improve accuracy by understanding the effects of the temperature changes in advance, measuring the actual ambient temperature, and correcting for the changes in characteristics due to temperature changes.

[0053] [Third Embodiment] Next, an output device 1 and a processing device 100 according to a third embodiment of the present invention will be described with reference to Figures 4 and 5. In describing the third embodiment, the same components as those in the previous embodiments will be denoted by the same reference numerals, and their description will be omitted or simplified. The output device 1 and the processing device 100 according to the third embodiment differ from the first and second embodiments in that initial settings are performed in advance to account for individual differences in the internal power supply 11 of each output device 1.

[0054] The data output device 1 and processing device 100 according to the third embodiment differ from the first and second embodiments in that the input voltage acquisition unit 101 acquires a reference calibration voltage value for calibrating the internal reference voltage value. The data output device 1 and processing device 100 according to the third embodiment also differ from the first and second embodiments in that the adjustment unit 103 adjusts the setting value of the DA converter 16 to adjust the positive output voltage value and the negative output voltage value toward the reference calibration voltage value.

[0055] Next, the operation of the output device 1 and the processing device 100 will be described. First, the input terminal 12 is connected to the output of the reference calibration equipment 300, which outputs a reference calibration voltage value. Next, the AD converter 15 performs AD conversion of the reference calibration voltage. Next, the adjustment unit 103 adjusts the setting value of the DA converter 16 so as to adjust the positive output voltage value and the negative output voltage value toward the positive reference calibration voltage and the negative reference calibration voltage of the reference calibration voltage. Next, the output voltage acquisition unit 102 acquires the positive output voltage value and the negative output voltage value.

[0056] Next, the AD converter 15 AD converts the positive and negative reference voltage values. The adjustment unit 103 adjusts the setting values ​​of the DA converter 16 for the positive and negative reference voltage values ​​so that they correspond to the adjusted positive and negative output voltage values. Based on the setting values ​​of the two DA converters 16 obtained by the matching operation, the absolute value of the internal reference voltage value can be accurately determined. Once the reference voltage value is determined, it can be used thereafter to output a highly accurate voltage or measure the voltage of a target device with high accuracy.

[0057] The data output device 1 and processing device 100 according to the third embodiment have the following advantages: (4) The input voltage acquisition unit 101 acquires a reference calibration voltage value for calibrating the internal reference voltage value, and the adjustment unit 103 adjusts the setting value of the DA converter 16 to adjust the positive output voltage value and the negative output voltage value toward the reference calibration voltage value. This makes it possible to set the setting value of the DA converter 16 in advance to match the voltage value of the internal power supply 11, which has large "individual differences between devices" or "individual variations," thereby improving the accuracy of the data output device 1.

[0058] Although preferred embodiments of the output device and processing device of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate. For example, in the above-described embodiments, the output device 1 is provided with the output terminal 14 and the input terminal 12, but the present invention is not limited to this. The output device 1 does not necessarily have to be provided with the output terminal 14 and the input terminal 12.

[0059] In the above embodiment, the processing device 100 may include a log storage unit that stores a log of adjustments. This makes it possible to use the adjustment history of the processing device 100 in analyzing the output device 1.

[0060] In each of the above embodiments, the processing device 100 may be configured to transmit a log of temperatures inside and outside the data output device 1 and a log of adjustments to an external server (not shown). A mechanism may also be adopted in which the external server performs statistical analysis of this information obtained from multiple data output devices 1. This allows the external server to discover data output devices 1 in which an abnormality has occurred and to perform wireless calibration and adjustment without a physical electrical connection to a primary standard or the like.

[0061] For example, the output device may include the above-mentioned processing device, an internal power supply, an inverting circuit that inverts the positive and negative polarities of the internal power supply, a communication unit that inputs a voltage value from the outside using wireless communication and outputs the voltage value to the outside, and a DA converter that outputs a predetermined voltage value to the output terminal, the DA converter being adjustable by an adjustment value determined based on the adjustment by the adjustment unit.

[0062] In the above embodiment, the voltage value is described as DC, but it may be AC. For example, the adjustment of the DA converter by the adjustment unit may be periodically changed over time, so that the DA converter outputs an AC voltage value.

[0063] In the above embodiment, the notification unit 105 notifies the external device of the measurement value or the calibration value, but this is not limitative. The notification unit 105 may be configured to notify the external device of both the measurement value and the calibration value.

[0064] Furthermore, in the above embodiment, the adjustment unit 103 may change the adjustment result based on a voltage value that is set in advance as the output value of the DA converter 16. The adjustment unit 103 may change the adjustment result based on, for example, a magnification of a predetermined voltage value to be output from the output terminal 14 relative to a reference voltage value. The adjustment unit 103 may, for example, receive an input of a magnification from outside and change the adjustment result based on the received magnification.

[0065] In the above embodiment, the conversion unit 104 may operate as a part of the adjustment unit 103. Furthermore, the adjustment unit 103 may adjust the DA converter 16 using the value converted by the conversion unit 104 during adjustment.

[0066] Furthermore, in the above embodiment, the processing device 100 acquires the positive and negative target voltage values ​​from the target device 200. However, this is not limiting. For example, the processing device 100 may output the DAC value (adjusted value) of the DA converter 16 toward the positive and negative internal reference voltage values ​​acquired from the internal power supply 11, without acquiring the positive and negative target voltage values ​​from the target device 200. That is, the processing device 100 may adjust the DA converter 16 so as to output voltage values ​​that approximate the reference voltage values ​​of the internal power supply 11. In this case, the adjustment unit 103 adjusts the setting value of the DA converter 16, adjusting the positive and negative output voltage values ​​toward the acquired positive and negative reference voltage values. This allows control to output highly accurate voltage values ​​without acquiring the positive and negative target voltage values ​​from the target device 200.

[0067] REFERENCE SIGNS LIST 1 Output device 11 Internal power supply 16 DA converter 100 Processing device 101 Input voltage acquisition unit 102 Output voltage acquisition unit 103 Adjustment unit 104 Conversion unit 105 Notification unit 106 Temperature acquisition unit

Claims

1. An output device that uses a DA converter to output a predetermined reference voltage value, Processing device and Internal power supply and An inverting circuit that reverses the polarity of the internal power supply, An input terminal used for inputting voltage values ​​from an external source, An output terminal used to output a voltage value to an external source, DA converter and, Equipped with, The aforementioned processing apparatus is An input voltage acquisition unit that acquires a positive reference voltage value and a negative reference voltage value output as an internal reference voltage value from the internal power supply, An output voltage acquisition unit that acquires the positive output voltage value and the negative output voltage value output from the DA converter, An adjustment unit for adjusting the setting value of the DA converter, comprising an adjustment unit for adjusting the positive output voltage value and the negative output voltage value toward the acquired positive reference voltage value and the negative reference voltage value, The DA converter is a DA converter that outputs a predetermined voltage value to the output terminal, and is adjustable by an adjustment value determined based on the adjustment by the adjustment unit. Output device.

2. The processing apparatus further comprises a notification unit that notifies the external party of the adjustment result adjusted by the adjustment unit, The input voltage acquisition unit acquires a positive target voltage value and a negative target voltage value that are assumed to be the same voltage value as the internal reference voltage value output from the device to be adjusted. The output device according to claim 1, wherein the adjustment unit adjusts the positive output voltage value and the negative output voltage value toward the acquired positive target voltage value and the negative target voltage value.

3. The processing apparatus further comprises a conversion unit that converts the adjustment result into a measured value of the target voltage output from the device under test, The output device according to claim 2, wherein the notification unit notifies the converted measurement value as an adjustment result.

4. The processing apparatus further comprises a conversion unit that converts the adjustment result into a calibration value for calibrating the target voltage value output from the device under test, The output device according to claim 2, wherein the notification unit notifies the converted calibration value as an adjustment result.

5. The apparatus further comprises a temperature acquisition unit that acquires the temperature of the surrounding atmosphere, The output device according to any one of claims 1 to 4, wherein the adjustment unit adjusts the setting value of the DA converter based on the positive reference voltage value, the negative reference voltage value, and the acquired temperature.

6. The input voltage acquisition unit acquires a reference calibration voltage value for calibrating the internal reference voltage value supplied from outside the output device, The output device according to any one of claims 1 to 5, wherein the adjustment unit adjusts the positive output voltage value and the negative output voltage value toward the reference calibration voltage value by adjusting the setting value of the DA converter.

7. The output device according to any one of claims 1 to 6, wherein the adjustment unit modifies the adjustment result based on a voltage value that is set in advance as the output value of the DA converter.