JP5789650B2 - Measurement system having power control function and power control method in the system - Google Patents

Description

  The present invention relates to a measurement system having a power supply control function for measuring characteristics of various communication devices and various devices that constitute a communication network such as IP / SDH, and a power supply control method in the system.

  Measuring and understanding the performance of various communication devices incorporated in communication networks such as the Internet such as the IP / SDH and the data transmission quality of digital data transmitted and received between communication devices is a new communication. This is an important item that is indispensable when developing equipment and constructing new communication networks. It is also an indispensable item for maintenance and management of operating communication devices and communication networks.

  The physical interface and communication protocol for this communication device and digital data differ depending on the measurement items for such communication device and digital data and the specifications of the communication device and digital data.

  However, it is necessary to incorporate physical interfaces and communication protocols for each measurement object into the measurement device. However, incorporating all measurement target physical interfaces and communication protocols into the measurement device complicates the entire measurement device and reduces the device price. There is a rising problem.

  Therefore, in order to solve such a problem, a physical interface conforming to the specification or standard of a measurement target such as a communication device or digital data that is connected to or input to itself as in Patent Document 1 below. There is disclosed a measurement information setting device for a measurement system that is equipped with a plurality of detachable measurement modules equipped with a communication protocol and measures the characteristics of various communication devices incorporated in various communication networks such as the Internet.

JP 2003-78583 A

  By the way, in a measuring apparatus in which a plurality of measuring modules such as the apparatus of Patent Document 1 are connected to a control module, a power supply module that can be switched instantaneously without using a commercial power supply and a battery is provided. In this configuration, power is constantly supplied to the control module and the measurement module.

  Therefore, for the purpose of protecting various hardware components mounted on the measurement module, when the control module is operating normally, the temperature near the hardware components mounted on the control module exceeds the guaranteed temperature. At this point, the power supply signal to the measurement module is switched from ON to OFF to stop the power supply from the power supply module.

  However, some trouble in the control module (for example, runaway of CPU (Central Processing Unit) installed in the control module, initialization of logic set in the FPGA (Field Programmable Gate Array) installed in the control module, and measurement When the activated software is not activated), the power supply control by the power supply signal may not be performed normally. Therefore, if the power supply signal to the measurement module remains in the ON state, various failures (for example, hardware components) caused by abnormal heat generation of the hardware components mounted by continuing the power supply from the power supply module Physical destruction, device start-up failure, unstable operation, loss of measurement data, etc.).

  Moreover, since the apparatus of patent document 1 may be used at the site where there are a plurality of measurement sites or the site where the measurement target is installed outdoors, for example, when performing optical fiber laying work or maintenance work, It is often portable as a specification of the device so that the user can freely carry it.

  Therefore, when working in an environment where the temperature inside the device rises more rapidly than normal use due to room temperature in the facility to be measured or under hot weather, even if a malfunction of the control module occurs, the device There is a need to develop devices that can be protected.

  Therefore, the present invention has been made in view of the above problems, and a measurement system having a power control function for protecting hardware in the apparatus when power supply becomes uncontrollable due to a malfunction of the control module, and An object of the present invention is to provide a power supply control method in the system.

In order to achieve the above-described object, the measurement system according to claim 1 includes a measurement voltage conversion unit 21 that converts the power supply from the power supply module 30 into a predetermined power supply voltage, and performs measurement on the measurement target. Module 20;
A control module 10 that outputs a supply control signal for controlling power supply from the voltage converter for measurement via a supply control line 1c wired to the measurement module;
In the measurement system 1 comprising
When the measurement module determines that the temperature value detected when a malfunction occurs in the control module near the hardware component to be mounted is an abnormal temperature exceeding the guaranteed temperature of the hardware component, the measurement voltage conversion unit An abnormal temperature power-off means 26 for forcibly turning off the power supply is provided.

The measurement system according to claim 2 is the measurement system according to claim 1, wherein a plurality of the measurement modules 20 are connected in parallel to the control module 20 via the supply control line 1c.
When the abnormal temperature power-off means 26 of any one of the plurality of measurement modules determines that the temperature value is an abnormal temperature, the abnormal temperature is mounted on the measurement module that has determined that the temperature value is an abnormal temperature. The power cut-off means performs a process of forcibly turning off the power supply to the voltage conversion units for measurement 21 of all the measurement modules connected via the supply control line.

The measurement system according to claim 3 is the measurement system according to claim 1 or 2, wherein the power cut-off means 26 at the abnormal temperature is
An abnormal temperature detector 23 for outputting a temperature value based on the temperature detected in the vicinity of the hardware mounted on the measurement module;
Comparing the temperature value detected by the abnormal temperature detection unit with a preset abnormal temperature determination threshold, and determining that the temperature value exceeds the abnormal temperature determination threshold, the voltage conversion unit for measurement A power-off processing unit 24 that forcibly cuts off the power supply from 21;
It has a capacitor 22a for storing the charge supplied from the measurement voltage conversion unit before the power is turned off, and the temperature stored in the capacitor is stored in the capacitor after the power is turned off. Module power storage unit 22 to be supplied to
It is provided with.

  According to a fourth aspect of the present invention, in the measurement system according to the third aspect, the power-off processing unit 24 determines that the temperature value detected by the abnormal temperature detection unit 23 is lower than the abnormal temperature determination threshold. Then, the power-off process for the voltage converter for measurement 21 is stopped, and the power supply state before the power-off process is restored.

The power supply control method according to claim 5 includes a measurement voltage conversion unit 21 that converts the power supply from the power supply module 30 into a power supply voltage necessary for driving, and is to be measured by supplying power from the measurement voltage conversion unit. A measurement module 20 for measuring
A control module 10 that outputs a supply control signal for controlling power supply from the voltage converter for measurement via a supply control line 1c wired to the measurement module;
A power supply control method in the measurement system 1 comprising:
Detecting the temperature in the vicinity of the hardware components mounted on the measurement module when a malfunction occurs in the control module, and outputting a temperature value based on the detected temperature;
When it is determined that the temperature value output from the temperature detection unit for abnormal temperature is an abnormal temperature exceeding the guaranteed temperature of the hardware component, the power-off processing unit 24 mounted on the measurement module performs the measurement. Forcibly turning off the power supply from the voltage conversion unit 21;
It is characterized by including.

The power supply control method according to claim 6 includes a measurement voltage conversion unit 21 that converts the power supply from the power supply module 30 into a power supply voltage necessary for driving, and is supplied with power from the measurement voltage conversion unit. A plurality of measurement modules 20 for measuring
A plurality of measurement modules connected in parallel via a supply control line 1c, and a control module 10 for outputting a supply control signal for controlling power supply from the power supply module 30 through the supply control line;
A power supply control method in the measurement system 1 comprising:
Detecting a temperature in the vicinity of a hardware component mounted on any of the plurality of measurement modules when the malfunction of the control module occurs, and outputting a temperature value based on the detected temperature; ,
When it is determined that the temperature value output from the temperature detection unit for abnormal temperature is an abnormal temperature exceeding the guaranteed temperature of the hardware component, the temperature value is mounted on the measurement module determined to be abnormal temperature A step of forcibly turning off the power supply to the measurement voltage converters of all the measurement modules connected through the supply control line,
It is characterized by including.

The power control method according to claim 7 is the power control method according to claim 5 or 6, wherein the power supplied from the measurement voltage conversion unit 21 is supplied to the measurement module 20 before the power is turned off. Storing in the capacitor 22a of the power storage unit 22,
After the power is cut off, supplying the charge stored in the capacitor to the abnormal temperature detecting unit 23 and the power-off processing unit 24, and continuing the power-off,
Is further included.

  The power supply control method according to claim 8 is the power supply control method according to any one of claims 5 to 7, wherein the temperature value detected by the power-off processing unit 24 with the abnormal temperature detection unit 23 is The method includes a step of stopping the power-off process for the measurement voltage conversion unit 21 to return to the power supply state before the power-off process when it is determined that the threshold value for abnormal temperature determination is lower.

  According to the present invention, even if a malfunction occurs in the control module that controls the power supply from the measurement voltage converter to the measurement module and the power supply cannot be controlled, the measurement module itself detects an abnormal temperature. Since the power supply from the voltage converter for measurement is forcibly cut off, there are various things such as physical destruction caused by abnormal heat generation due to power supply, device startup failure, unstable operation, loss of measurement data, etc. Can be prevented in advance.

  In addition, even when the power supply is forcibly turned off, power is supplied from the module power storage unit to the temperature detection unit for abnormal temperature and the power-off processing unit. The power-off is continued until the voltage accompanying the discharge of the electric charge falls below the operating limit of the abnormal temperature detection unit and the power-off processing unit, or the temperature value detected by the abnormal temperature detection unit falls below the abnormal temperature determination threshold. be able to.

  Further, even when a plurality of measurement modules are connected in parallel to the control module via supply control lines, if an abnormal temperature is detected in any of the plurality of measurement modules, the abnormal temperature is set. A plurality of measurement modules are connected in order to forcibly perform power-off processing for the voltage conversion units for measurement of all the measurement modules to which the power-off processing unit of the detected measurement module is connected via the supply control line Various failures caused by abnormal heat generation that may occur when a malfunction occurs in the control module can be prevented in advance.

  In addition, when the power-off processing unit determines that the temperature value detected by the abnormal temperature detection unit is below the abnormal temperature determination threshold, the power-off processing for the measurement voltage conversion unit 21 is stopped and before the power-off processing. In the event of an emergency, various faults based on the power supply can be prevented in advance, and when the detected temperature value falls below the abnormal temperature determination threshold, it automatically returns to the state before the power-off process. can do.

It is a functional block diagram which shows the system configuration | structure of the measurement system which has a power supply control function which concerns on this invention. It is a conceptual diagram which shows the example of a connection of each module in the same apparatus, and a system configuration example.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited by this embodiment, and all other forms, examples, operation techniques, etc. that can be implemented by those skilled in the art based on this form are included in the scope of the present invention. .

  The present invention provides an object to be measured (transmission device or optical device) during laying work or maintenance / inspection of existing communication equipment when constructing a communication network (whether wired or wireless) such as the Internet, various LANs, or IP / SDH, for example. In a measurement system 1 that performs measurements on components such as fibers and the network itself), a measurement module 1 is connected to the control module 10 when the control module 10 that performs overall control of the system fails to control power supply. When an abnormal temperature rise is detected in the module 20, the power supply from the power supply module 30 is forcibly turned off in the measurement voltage conversion unit 21 to protect the hardware components mounted on the measurement module, and thus measure. The purpose is to protect other modules around the module.

[System configuration]
First, the configuration of the measurement system 1 according to the present invention will be described.
As shown in FIG. 1, the measurement system 1 of the present example is schematically configured to include a control module 10, measurement modules 20 (two in the illustrated example), and a power supply module 30. In the measurement system 1, the control module 10 and the measurement module 20 are connected via a data bus 1 a in order to communicate measurement data related to measurement according to the measurement target. Further, a power supply line 1 b for constantly supplying power to the control module 10 and the measurement module 20 is wired from the power supply module 30.

  Further, the measurement system 1 of this example controls the power supply supplied from the power supply module 30 to the measurement voltage converter 21 described later when the measurement contents or the system drive program is abnormal, and the power supply is appropriately turned on. In order to perform the / OFF control, the measurement modules 20 are connected in parallel to the control module 10 via the supply control line 1c which is a common control line for power supply control.

  In the following description, as an example of a system configuration, a device in which each module as shown in FIG. 2 is connected in a stack manner with a bus connector or various dedicated lines and stored in one casing (a plurality of such modules are stacked). Examples of devices connected to the equation include network measurement devices, spectrum analyzers, OTDRs (Optical Time Domain Reflectometers), power meters, error detectors, etc.), but are not limited to this. A system configuration in which modules are connected as described above may be used as a separate configuration.

  Further, in this example, in order to perform a plurality of measurements on a plurality of objects to be measured at the same time, a plurality of measurement modules 20 (two in the illustrated example) having a function capable of performing a measurement according to the objects to be measured. ) Is connected to the control module 10, but the number of measurement modules 20 may be one or more.

<About the control module>
The control module 10 is modularized by including a control voltage conversion unit 11, a control unit 12, a guaranteed temperature temperature detection unit 13, an operation display unit 14, and an input unit 15.

  The control voltage conversion unit 11 is composed of a transformer circuit such as a DC / DC converter, and is necessary for driving each part of the control module 10 with the power that is always supplied from the power supply module 30 via the power supply line 1b. The power supply voltage is converted, and the power supply to each part in the module is controlled in accordance with a supply control signal (supply ON signal, supply OFF signal) from the control unit 12.

  The control unit 12 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an MPU (Micro-Processing Unit) having these functions, an FPGA (Field Programmable Gate Array), and the like. This is a configuration in which hardware parts are arbitrarily combined.

  The control unit 12 is based on various control programs such as a measurement processing program and a drive processing program that are set in advance according to the measurement target, signals output from each unit constituting the system, measurement data from the measurement module 20, and the like. It performs drive control of the entire system and execution / analysis processing of a measurement processing program according to the content of measurement performed on the measurement target.

  Further, the control unit 12 outputs a supply control signal for supplying power to the measurement module 20 connected via the supply control line 1c at a necessary timing.

  Further, the control unit 12 sets the temperature value detected by the guaranteed temperature detection unit 13 for each hardware component mounted on the control module 10 as a function for protecting hardware components due to temperature rise. In addition, there is provided supply stop processing means 12a for stopping power supply when the guaranteed temperature (about 80 ° C.) and the guaranteed temperature of the entire system are exceeded.

  The supply stop processing means 12a includes a guaranteed temperature discrimination threshold that is a first threshold set by using the guaranteed temperature of each hardware component mounted on the control module 10 as a threshold, and the temperature detected by the guaranteed temperature temperature detection unit 13. When the detected temperature value exceeds the guaranteed temperature discrimination threshold, the measurement voltage conversion unit 21 of the measurement module 20 connected via the control voltage conversion unit 11 and the supply control line 1c is compared. A supply OFF signal is output. Thereby, the power supply to the control module 10 and the measurement module 20 is stopped.

  The guaranteed temperature detection unit 13 is composed of a temperature sensor such as a thermistor or a temperature sensor IC (Integrated Circuit), for example, and detects the temperature in the vicinity of hardware components (particularly in the vicinity of the control unit 12) mounted on the control module 10. The temperature value based on the detected temperature is output to the control unit 12.

  As is well known, the operation display unit 14 is a touch panel that combines a touch pad provided with a transparent planar pressure sensor such as a resistive film type or a capacitance type on the display surface of a display device such as an LCD (Liquid Crystal Display). When the user presses the software key displayed on the display device with a pointing device such as a finger or a pen tablet, the planar pressing sensor outputs an operation signal indicating the pressing position (pressing coordinate) to the control unit 12 doing. The operation display unit 14 also displays measurement data and various display contents during system operation.

  The input unit 15 is an operation key physically provided as a hardware key, and specifically includes a power key, a start key, a clear key for canceling the operation content, and a numeric keypad for inputting instructions related to numbers. The input unit 15 outputs an operation signal corresponding to a key operation performed by the user to the control unit 12.

  The operation keys constituting the input unit 15 may be linked with software keys displayed on the operation display unit 14 or may be configured as a function different from the software keys.

<About measurement module>
The measurement module 20 includes a measurement voltage conversion unit 21, a module power storage unit 22, an abnormal temperature detection unit 23, a power-off processing unit 24, and a measurement unit 25, and is modularized. One or more are connected accordingly.

  In addition, each unit (module power storage unit 22, abnormal temperature temperature detection unit 23, and power-off processing unit 24) surrounded by an alternate long and short dash line in FIG. 1 includes all modules including its own module at the time of abnormal temperature detection. It functions as power-off means 26 at the time of abnormal temperature for forcibly turning off the power supply of the measurement module 20.

  The voltage conversion unit for measurement 21 is composed of a transformer circuit such as a DC / DC converter, and is necessary for driving each part of the measurement module 20 with power that is always supplied from the power supply module 30 via the power supply line 1b. The power supply voltage is converted, and the power supply to each part in the module is controlled in accordance with a supply control signal (supply ON signal, supply OFF signal) from the control module 10.

  In addition, when the supply ON signal is converted into the supply OFF signal by the power-off processing of the power-off processing unit 24, the measurement voltage conversion unit 21 forcibly stops the power supply to each unit in the measurement module 20. That is, after the power-off process, the power supply from the power supply module 30 is continued to the measurement voltage conversion unit 21, but the supply of the power supply voltage from the measurement voltage conversion unit 21 to each part of the measurement module 20 is stopped. Will be.

  The module power storage unit 22 includes a backflow prevention diode 22a and a capacitor 22b. The module power storage unit 22 is supplied with power from the power supply module 30 via the measurement voltage conversion unit 21, and the electric charge associated with the power supply is stored in the capacitor 22b via the backflow prevention diode 22a.

  The reason why the capacitor 22b is used as the power storage means of the module power storage unit 22 is that primary batteries (for example, lithium batteries) and secondary batteries (for example, lithium ion storage batteries) are legally regulated, Compared to secondary batteries, the energy density is low, but it is maintenance-free and has a long life, and is effective for short-time power outages and peak leveling. It is preferable to use it.

  In addition, the capacitor 22b has a fixed time (even in the usage environment) from when the temperature value in the vicinity of the hardware component detected by the abnormal temperature detection unit 23 is determined to be abnormal temperature to below an abnormal temperature determination threshold described later. However, it is preferable to select a capacitor having a capacitance that can be expected to continue the power supply.

Here, the flow of power supply of the module power storage unit 22 will be described. As shown in FIG. 1, when the power ON control is performed from the control module 10, the power is supplied from the power module 30 through the measurement voltage conversion unit 21. The electric charge associated with the power supplied is stored in the capacitor 22b via the backflow prevention diode 22a and supplied to the temperature detector 23 for abnormal temperature and the power-off processor 24 (solid line arrow in the figure).
On the other hand, during the power-off processing by the power-off processing unit 24, the power supply from the power supply module 30 is cut off via the measurement voltage conversion unit 21, and the charge stored in the capacitor 22b is detected as the abnormal temperature detection unit 23. And supplied to the power-off processing unit 24 (dotted line arrow in the figure).

  As described above, in the present system, when the control module 10 is functioning normally, power supply is controlled according to the supply control signal from the control module 10, and when the control module 10 has some malfunction and does not function normally. When the abnormal temperature is detected, the power-off processing unit 24 cuts off the power supply from the power supply module 30 via the measurement voltage conversion unit 21 and supplies the electric charge stored in the capacitor 22b to supply the abnormal temperature temperature. The detection unit 23 and the power-off processing unit 24 are driven.

  Thus, after the power supply from the measurement voltage conversion unit 21 is stopped, the electric charge stored in the capacitor 22b is supplied to the temperature detection unit 23 for abnormal temperature and the power-off processing unit 24, so that the vicinity of the hardware component The power-off processing unit 24 can continue the power-off state for a certain time until the temperature value falls below an abnormal temperature determination threshold described later. In addition, when the power-off state is forcibly continued for a certain period of time, the circuit of the abnormal temperature detecting unit 23 and the power-off processing unit 24 is turned off, and the power supply is oscillated. It also leads to the effect of preventing the oscillation operation.

  The abnormal temperature detection unit 23 is constituted by a temperature sensor such as a thermistor or a temperature sensor IC (Integrated Circuit), for example, detects a temperature in the vicinity of the hardware component mounted on the measurement module 20, and based on the detected temperature. The temperature value is output to the power-off processing unit 24.

  The power-off processing unit 24 is set to discriminate between the temperature value detected by the temperature detection unit 23 for abnormal temperature and the abnormal temperature (for example, 90 to 100 ° C.) exceeding the guaranteed temperature of the hardware components to be mounted. When the detected temperature value exceeds the abnormal temperature discrimination threshold, the module or the supply control line 1c is turned on as a power-off process. The supply ON signal output to all the measurement modules 20 connected via the switch is switched to the supply OFF signal, and the power supply from the measurement voltage converter 21 is forcibly cut off.

  In detail, in this embodiment, the power cut-off processing unit 24 is provided with an open drain or open collector buffer, and the power supply ON / OFF control in the measurement voltage converting unit 21 is controlled by the supply control signal. In this mode, the voltage levels are distinguished by high and low (H signal: supply ON signal, L signal: supply OFF signal).

  Therefore, when the power cut-off process is performed, the power cut-off processing unit 24 forcibly pulls in a predetermined voltage via the supply control line 1c to lower the voltage level of the supply control signal. The supply ON signal output in this way is forcibly converted into a supply OFF signal, thereby turning off the power.

  Further, since the temperature stored in the capacitor 22b is supplied to the abnormal temperature detector 23 and the power-off processing unit 24 after the power-off process, the voltage accompanying the discharge of the charge stored in the capacitor 22b is used for the abnormal temperature. The power-off state is continued until the temperature limit detected by the temperature detector 23 and the power-off processing unit 24 falls below the operating limit of the temperature detector 23 and the power-off processing unit 24 or the temperature value detected by the abnormal-temperature temperature detector 23 falls below the abnormal temperature discrimination threshold.

  It should be noted that before the temperature value detected by the abnormal temperature detection unit 23 falls below the abnormal temperature determination threshold, the electric charge stored in the capacitor 22b becomes the operation limit of the abnormal temperature detection unit 23 and the power-off processing unit 24. When the voltage is lower than, the power supply from the measurement voltage conversion unit 21 is temporarily supplied and stored in the capacitor 22b, and the voltage associated with the discharge of the charge stored in the capacitor 22b becomes the abnormal temperature detection unit 23 and It is supplied to the power-off processing unit 24 and returns to the power-off state again. At this time, even if the power supply from the voltage converter for measurement 21 is temporarily supplied and stored in the capacitor 22b, the capacitor 22b can be charged in a short time. It can be returned to the state.

  When the power-off processing unit 24 determines that the temperature value detected by the abnormal temperature temperature detection unit 23 after the power-off processing is below the abnormal temperature determination threshold, the power-off processing to the measurement voltage conversion unit 21 is performed. Power supply return control for stopping the power supply and returning it to the state before the power-off process (that is, the ON / OFF state of the supply control signal output from the control module 20 before the power-off process). By performing the measurement on the measurement voltage converters 21 of all the measurement modules 20 connected via the power supply, it is possible to self-return to the power supply state before the power-off process.

  The measurement unit 25 has a configuration capable of performing measurement processing according to the measurement target. The measurement unit 25 receives power supply from the power supply module 30 via the measurement voltage conversion unit 21 and is controlled by control from the control unit 12. Measure the measurement object. Therefore, the measurement desired by the user can be performed by combining the measurement module 20 including the measurement unit 25 according to the use environment and the test target.

<About power supply module>
The power supply module 30 includes a battery unit 31 formed of a known storage battery, and an AC / DC power supply unit 32 that converts an alternating current (AC) power source (for example, an effective value of 100 V) from a commercial power source into a predetermined direct current (DC) power source. And a power source switching unit 33 that switches power supply from the battery unit 31 and the AC / DC power source unit 32 according to the supply state to prevent instantaneous interruption.

  The power supply module 30 drives the system by the power supply from the commercial power supply when the power supply from the commercial power supply is possible under the control of the control module 10, and the battery unit 31 when the commercial power supply cannot be used outdoors or the like. Then, the power supply switching unit 33 is switched so as to drive the system by supplying power.

  In addition, the power supply module 30 stores power in the battery unit 31 when power is supplied from a commercial power source, and is stable by switching the power supply source to the battery unit 31 without a momentary interruption when the voltage of the AC power supply is reduced or during a power failure. Power supply is realized.

[About processing operations]
Next, a series of processing operations related to power control by the measurement system 1 will be described. Here, when the control module 10 is normally driven, processing operation when the power supply received from the power supply module 30 is stopped by controlling the measurement voltage conversion unit 21 and some trouble has occurred in the control module 10. A processing operation when the power supply received from the power supply module 30 is stopped by controlling the measurement voltage conversion unit 21 will be described.

<About power stop control during normal operation>
When the control module 10 is operating normally, the temperature detection unit 13 for the guaranteed temperature provided in the control module 10 detects the temperature in the vicinity of the hardware components mounted on the control module 10, and the detected temperature value and The set guarantee temperature discrimination threshold is compared.

  As a result of the comparison, if it is determined that the detected temperature value exceeds the guaranteed temperature discrimination threshold, a supply OFF signal is output to the connected measurement module 20 to control the measurement voltage converter 21 and stop the power supply.

<About power supply stop control when trouble occurs>
When any trouble occurs in the control module 10, the temperature detection unit 23 for abnormal temperature provided in the measurement module 20 detects the temperature in the vicinity of the hardware components mounted on the measurement module 20, and sets the detected temperature value and the preset value. The abnormal temperature discrimination threshold is compared.

  As a result of the comparison, when it is determined that the detected temperature value exceeds the abnormal temperature determination threshold, the power-off processing unit 24 forcibly pulls in a predetermined voltage via the supply control line 1c, and lowers the voltage level of the supply control signal. Then, the supply ON signal is switched to the supply OFF signal to stop the power supply from the measurement voltage converter 21 and forcibly power off all the measurement modules 20 connected via the own module and the supply control line 1c. To do.

  In addition, after the power-off process, the electric charge stored in the capacitor 22b of the module power storage unit 22 is supplied to the abnormal temperature detection unit 23 and the power-off processing unit 24. For this reason, the voltage accompanying the discharge of the electric charge stored in the capacitor 22b falls below the operation limit of the abnormal temperature temperature detection unit 23 and the power-off processing unit 24, or the temperature value detected by the abnormal temperature detection unit 23 is abnormal. Until the temperature determination threshold is exceeded, the power supply stop state is maintained for all the measurement modules 20 connected via the measurement voltage converter 21 and the supply control line 1c that have been subjected to the power-off processing by the power-off processing unit 24. Is done.

  Further, when the power-off processing unit 24 determines that the temperature value detected by the abnormal temperature temperature detection unit 23 after the power-off process is below the abnormal temperature determination threshold, the power-off processing to the measurement voltage conversion unit 21 is performed. The power supply return control for stopping the power supply and returning to the state before the power-off process is performed for the measurement voltage converters 21 of all the measurement modules 20 connected via the own module or the supply control line 1c. As a result, when the temperature value detected by the abnormal temperature detection unit 23 falls below the abnormal temperature determination threshold, the power supply state before the power-off process is self-returned.

  In addition, before the temperature value detected by the abnormal temperature detection unit 23 falls below the abnormal temperature determination threshold, the electric charge stored in the capacitor 22b becomes the operation limit of the abnormal temperature detection unit 23 and the power-off processing unit 24. When the voltage is lower than, the power supply from the measurement voltage conversion unit 21 is temporarily supplied and stored in the capacitor 22b, and the voltage associated with the discharge of the charge stored in the capacitor 22b becomes the abnormal temperature detection unit 23 and The power is supplied to the power-off processing unit 24 to return to the power-off state again.

  As described above, the measurement system 1 described above outputs a supply control signal to the measurement voltage converter 21 of each measurement module 20 via the supply control line 1c when the control module 10 is normally driven. Then, power supply ON / OFF control is performed. When it is determined that the temperature value detected by the abnormal temperature detection unit 23 of the measurement module 20 has exceeded the abnormal temperature determination threshold when some trouble occurs in the control module 10, the own module and The supply ON signal output to the measurement voltage converters 21 of all the measurement modules 20 connected via the supply control line 1c is switched to the supply OFF signal to forcibly turn off the power.

  Thereby, even if some trouble occurs in the control module 10 and the power control for the measurement module 20 becomes uncontrollable, the supply control is forcibly performed when the temperature value detected by the measurement module 20 is determined to be an abnormal temperature. Since all the measurement modules 20 can be powered off via the line 1c, physical destruction caused by abnormal heat generation due to unnecessary power supply, device start-up failure, unstable operation, loss of measurement data, etc. Can prevent various failures.

  Even when the power-off processing unit 24 is forcibly turned off, the power stored in the module power storage unit 22 is supplied to the abnormal temperature detection unit 23 and the power-off processing unit 24. The temperature value detected by the abnormal temperature detector 23 whether the voltage associated with the discharge of the electric charge stored in the capacitor 22b remains below the operation limit of the abnormal temperature detector 23 and the power cutoff processor 24 even after the disconnection process. Can be continued until the temperature falls below the abnormal temperature discrimination threshold.

  Further, when the power-off processing unit 24 determines that the temperature value detected by the abnormal temperature temperature detection unit 23 after the power-off process is below the abnormal temperature determination threshold, the power-off processing to the measurement voltage conversion unit 21 is performed. Is performed on the voltage conversion units 21 for measurement of all the measurement modules 20 connected via its own module or the supply control line 1c. When the temperature value detected by the abnormal temperature detection unit 23 falls below the abnormal temperature determination threshold, the power supply state before the power-off process can be self-returned.

  In addition, since the capacitor 22b can be charged in a short time, the charge stored in the capacitor 22b is detected before the temperature value detected by the abnormal temperature detection unit 23 falls below the abnormal temperature determination threshold. When the operation limit of the unit 23 and the power-off processing unit 24 is below, the power supply from the measurement voltage conversion unit 21 is temporarily supplied to store in the capacitor 22b, and the charge stored in the capacitor 22b is discharged. Since the accompanying voltage can be supplied to the temperature detector 23 for abnormal temperature and the power-off processing unit 24, the power-off state can be resumed by returning to the power-off state from the state before the power-off processing in a short time. .

  By the way, in the above-described embodiment, the configuration example in which the control module 10, the measurement module 20, and the power supply module 30 are accommodated in one casing has been described. Therefore, the guaranteed temperature detection unit 13 is mounted in the control module 10. Although described, it is not limited to this. For example, when each module is divided into separate housings to constitute the present system, the temperature detection unit 13 for guaranteed temperature is also mounted on the measurement module 20, and the vicinity of the hardware components constituting the measurement module 20 (especially measurement) If the temperature in the vicinity of the unit 25 is detected and the temperature value is output to the control module 10, the power supply control based on the guaranteed temperature can be performed on the measurement module 20 having a separate configuration.

  Further, in the above-described embodiment, when an abnormal temperature is detected in the measurement module 20, the module and the supply control line that have detected the abnormal temperature by forcibly pulling a predetermined voltage through the supply control line 1c as a power-off process. Although the description has been given of the configuration in which the supply ON signal output to all the measurement modules 20 connected via 1c is converted into the supply OFF signal and the power supply from the measurement voltage converter 21 is forcibly turned off. It is not limited to this. For example, when the power-off processing unit 24 determines that the temperature value detected by the abnormal temperature detection unit 23 has exceeded the abnormal temperature determination threshold, all the measurements connected via its own module and the supply control line 1c. A power-off control signal (corresponding to a supply OFF signal output from the control module 10), which is a control signal for stopping power supply to the measurement voltage converter 21 of the module 20, is output to forcibly supply power It can also be set as the structure which cuts off a power supply automatically.

DESCRIPTION OF SYMBOLS 1 ... Measurement system (1a ... Data bus, 1b ... Power supply line, 1c ... Supply control line)
DESCRIPTION OF SYMBOLS 10 ... Control module 11 ... Voltage converter for control 12 ... Control part (12a ... Supply stop process means)
DESCRIPTION OF SYMBOLS 13 ... Guaranteed temperature detection part 14 ... Operation display part 15 ... Input part 20 ... Measurement module 21 ... Voltage converter for measurement 22 ... Power storage part for modules (22a ... Backflow prevention diode, 22b ... Capacitor)
DESCRIPTION OF SYMBOLS 23 ... Abnormal temperature detection part 24 ... Power-off process part 25 ... Measurement part 26 ... Power-off means at abnormal temperature 30 ... Power supply module 31 ... Battery part 32 ... AC / DC power supply part 33 ... Power supply switching part

Claims (8)

A measurement module (20) having a measurement voltage converter (21) for converting power from the power supply module (30) into a predetermined power supply voltage, and performing measurement on the measurement target;
A control module (10) for outputting a supply control signal for controlling power supply from the voltage converter for measurement via a supply control line (1c) wired to the measurement module;
In a measurement system (1) comprising
When the measurement module determines that the temperature value detected when a malfunction occurs in the control module near the hardware component to be mounted is an abnormal temperature exceeding the guaranteed temperature of the hardware component, the measurement voltage conversion unit A measuring system comprising power-off means (26) at an abnormal temperature for forcibly turning off power supply. A plurality of the measurement modules (20) are connected in parallel to the control module (20) via the supply control line (1c),
When the abnormal temperature power-off means (26) of any one of the plurality of measurement modules determines that the temperature value is an abnormal temperature, the abnormality mounted on the measurement module that has determined that the temperature value is an abnormal temperature. The power-off means at the time of temperature performs a process of forcibly turning off the power supply to the measurement voltage converters (21) of all the measurement modules connected via the supply control line. The measurement system according to claim 1. The abnormal temperature power cut-off means (26)
An abnormal temperature detector (23) for outputting a temperature value based on the temperature detected in the vicinity of the hardware mounted on the measurement module;
Comparing the temperature value detected by the abnormal temperature detection unit with a preset abnormal temperature determination threshold, and determining that the temperature value exceeds the abnormal temperature determination threshold, the voltage conversion unit for measurement A power-off processing unit (24) for forcibly turning off the power supply from (21);
It has a capacitor (22a) for storing the charge supplied from the measurement voltage converter before the power is turned off. After the power is turned off, the charge stored in the capacitor is stored in the abnormal temperature detector and the power supply. A module power storage unit (22) to be supplied to the processing unit;
The measurement system according to claim 1, further comprising: When the power-off processing unit (24) determines that the temperature value detected by the abnormal temperature temperature detection unit (23) is lower than the abnormal temperature determination threshold, the measurement voltage conversion unit (21) The measurement system according to claim 3, wherein the power-off process is stopped and the power supply state before the power-off process is restored. A measurement module having a measurement voltage conversion unit (21) for converting the power supply from the power supply module (30) into a power supply voltage necessary for driving, and performing measurement on the measurement object by supplying power from the measurement voltage conversion unit (20) and
A control module (10) for outputting a supply control signal for controlling power supply from the voltage converter for measurement via a supply control line (1c) wired to the measurement module;
A power supply control method in a measurement system (1) comprising:
Detecting the temperature in the vicinity of the hardware component mounted on the measurement module when the malfunction of the control module occurs, and outputting a temperature value based on the detected temperature;
When it is determined that the temperature value output from the temperature detector for abnormal temperature is an abnormal temperature exceeding the guaranteed temperature of the hardware component, a power-off processing unit (24) mounted on the measurement module Forcibly turning off the power supply from the voltage converter for measurement (21);
A power supply control method comprising: A plurality of measurement voltage converters (21) for converting the power source from the power supply module (30) into a power source voltage required for driving, and performing measurement on the measurement object by supplying power from the measurement voltage converter unit; A measurement module (20);
A plurality of the measurement modules are connected in parallel via a supply control line (1c), and a control module (10) for outputting a supply control signal for controlling power supply from the power supply module (30) via the supply control line When,
A power supply control method in a measurement system (1) comprising:
When a malfunction occurs in the control module, the temperature in the vicinity of the hardware component mounted on any of the plurality of measurement modules is detected by the abnormal temperature detector (23), and a temperature value based on the detected temperature is output. Steps,
When it is determined that the temperature value output from the temperature detection unit for abnormal temperature is an abnormal temperature exceeding the guaranteed temperature of the hardware component, the temperature value is mounted on the measurement module determined to be abnormal temperature A step of forcibly turning off the power supply to the measurement voltage converters of all the measurement modules connected through the supply control line;
A power supply control method comprising: Storing the electric charge supplied from the measurement voltage conversion unit (21) in the capacitor (22a) of the module power storage unit (22) included in the measurement module (20) before power-off;
After the power is turned off, supplying the electric charge stored in the capacitor to the abnormal temperature detecting unit (23) and the power-off processing unit (24), and continuing the power-off,
The power supply control method according to claim 5, further comprising: Further, when it is determined that the temperature value detected by the power-off processing unit (24) by the abnormal temperature temperature detection unit (23) is lower than the abnormal temperature determination threshold, the measurement voltage conversion unit (21 The power supply control method according to any one of claims 5 to 7, further comprising a step of stopping the power-off process for the power supply to a power supply state before the power-off process.

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