CN113490889A - Elapsed time display system, electric machine, and elapsed time calculation method for electric machine - Google Patents
Elapsed time display system, electric machine, and elapsed time calculation method for electric machine Download PDFInfo
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- CN113490889A CN113490889A CN202080016592.XA CN202080016592A CN113490889A CN 113490889 A CN113490889 A CN 113490889A CN 202080016592 A CN202080016592 A CN 202080016592A CN 113490889 A CN113490889 A CN 113490889A
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- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
- G04F8/02—Apparatus for measuring unknown time intervals by electromechanical means using an electromechanical oscillator
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/26—Setting the time according to the time information carried or implied by the radio signal the radio signal being a near-field communication signal
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
- G07C3/02—Registering or indicating working or idle time only
- G07C3/04—Registering or indicating working or idle time only using counting means or digital clocks
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- Measurement Of Unknown Time Intervals (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
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Abstract
The present invention includes an electric machine (10) and an external device (8) capable of short-range wireless communication therewith. The electric machine (10) includes a timer device (1), a volatile memory (11), and a nonvolatile memory (12). The timer device (1) has an oscillation circuit and counts the elapsed time from the start. The volatile memory (11) records data for calculating the total elapsed time. The total elapsed time (T0) is the time from the start time to the current time. The total elapsed time is calculated by either one of the electric machine (10) and the external device (8). The start time (WS) is the start time of power supply to the electric machine (10), and is written in the nonvolatile memory (12). The current time (WR) does not stop. That is, the current time is managed by the external device (8), and therefore, the stop is not performed regardless of the ON/OFF of the electric machine (10).
Description
Technical Field
The invention relates to an elapsed time display system, an electric machine, and an elapsed time calculation method thereof.
Background
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2009-282948
Disclosure of Invention
Problems to be solved by the invention
In many machine tools and industrial devices mainly used in factories, consumables such as filters and oils are used therein. These consumables gradually deteriorate in performance due to cumulative use time and the influence of heat, vibration, and the like. In particular, the aging deterioration due to the cumulative service time is a phenomenon in which deterioration progresses even when the machine is not in use, because of oxidation of consumables and contamination during operation. Therefore, the time counting function that can use the accumulated usage time of the machine itself for an alarm or the like is an important function for preventing a failure of the machine body due to deterioration of consumables.
As this timer function, patent document 1 describes that a display device and a control device are respectively provided with a timer device capable of comparing accumulated use time, and when one of the timer data is lost, the other timer data is backed up. However, since the timer device is electrically operated and stops when the power supply of the electric machine is OFF, the electric machine cannot record the elapsed time (the elapsed time that affects the deterioration of the consumable with time) including the accumulation of the stop time.
In addition, in order to measure the operation stop time, it is conceivable to supply power to the time measuring device using a battery of a system different from the main power supply, but there are problems in that the cost of components required for power supply and the cost of maintenance for monitoring the consumption of the battery itself increase. The reason for the cost increase is that 2 time counting devices are required to maintain the continuity of the accumulated use time.
For example, in the case of an electric machine of simple design based on the minimum necessary functions, if the cumulative time from the start of use is unknown, the replacement timing of the deteriorated component cannot be estimated over time. In this case, the customer cannot be advised of maintenance at an appropriate timing. However, since the timer device incorporated in the electric machine is turned OFF together with the electric machine when the electric machine is powered OFF, the accumulated time counted by the timer device does not coincide with the elapsed time.
Accordingly, an object of the present invention is to provide an elapsed time display system capable of counting and displaying a cumulative usage time including a stop period in which power supply is cut off.
Means for solving the problems
In order to solve the above problem, for example, the structure described in the claims is adopted. The present application includes a plurality of technical means for solving the above-described problems, and is directed to an elapsed time display system including an electric machine and an external device capable of performing short-range wireless communication with the electric machine, by way of example. Wherein, the electric machine includes: a timer device having an oscillation circuit and counting an elapsed time from a start; a volatile memory and a non-volatile memory that can be written to the starting moment of the power supply to the electric machine. In addition, either the electric machine or the external device calculates a total elapsed time, which is a time from the start time of writing in the nonvolatile memory to the current time of management by the external device.
Effects of the invention
According to the present invention, it is possible to provide an elapsed time display system capable of counting and displaying a cumulative usage time including a stop period in which power supply is cut off.
Drawings
Fig. 1 is a block diagram showing a schematic configuration of an elapsed time display system and an electric machine according to embodiment 1 of the present invention.
Fig. 2 is an explanatory diagram showing a data flow in the elapsed time display system and the control device in the electric machine according to embodiment 1 shown in fig. 1.
Fig. 3 is a block diagram showing a schematic configuration of an elapsed time display system and an electric machine according to embodiment 2 of the present invention.
Detailed Description
Hereinafter, an elapsed time display system and an electric machine according to an embodiment of the present invention will be described with reference to the drawings. In the embodiments, the same reference numerals are given to elements having the same effects, and overlapping descriptions are avoided.
Example 1
Fig. 1 is a block diagram showing a schematic configuration of an elapsed time display system 30 and an electric machine 10 according to embodiment 1 of the present invention. First, the electric machine 10 is composed of a mechanism unit 7 including a container for accumulating air and a compression mechanism, an electric unit 5 including a motor for driving the compression mechanism and a cooling fan, and a control device 9 for electronically controlling the supply of electric power to the electric unit 5. The electric machine 10 also has a short-range communication device 3. The elapsed time display system 30 can display the total elapsed time T0 of the electric machine 10 using the external device 8.
The controller 9 is mainly composed of a printed Circuit board on which at least 2 or more kinds of Circuit boards are mounted by means of soldering or the like, among an IC (Integrated Circuit) such as a microcomputer or an FPGA (Field Programmable Gate Array), an electronic component such as a resistor, a capacitor, or an oscillation Circuit, an electric component such as a transistor or a relay, an LED (Light Emitting Diode), or a display such as a liquid crystal.
The control device 9 is composed of a control unit 2, a timepiece 1, a short-range communication device 3, and an antenna 4 connected to the short-range communication device 3. The control unit 2, the timer device 1, and the short-range communication device 3, which occupy most of them, are each realized by only circuit components, only soft functions in an IC, or a mixture of both. For example, the clock and timer functions can be realized by a circuit configuration including the crystal oscillator X, the transistor Tr, the capacitor C, the resistor R, the coil L, the relay, and other electronic components, and can be replaced with an IC forming a microcomputer having a soft function based on a required program.
The near field communication device 3 can perform bidirectional communication with the external apparatus 8. The antenna 4 is involved in communication between both directions, and when a radio signal is transmitted to the outside of the electric machine 10, transmission power is supplied from the short-range communication device 3. In the electric machines 10 and 20 (fig. 1 and 3), the antenna 4 is preferably mounted outside the circuit board including the timepiece device 1 in terms of its characteristics.
As shown in fig. 1, the electric machine 10 can be configured such that the control unit 2, the timer device 1, and the short-range communication device 3 are control ICs of different components, and they are connected by electric wires. However, the present invention may be provided in a form of a program that encapsulates all of these functions in a single-package IC.
The electric unit 5 and the mechanism unit 7 have various sensors for acquiring information on the internal and external states of the electric machine 10. These sensors, for example, a heat sensor and a pressure sensor, are electrically connected to the circuit of the control device 9 and participate in the operation of the entire electric machine 10.
The control Unit 2 includes a CPU (Central Processing Unit) capable of performing electronic arithmetic Processing, a volatile Memory 11 (e.g., SDRAM (Synchronous Dynamic Random Access Memory)) for holding data during power-on, and a nonvolatile Memory 12 (e.g., flash Memory) for recording programs and data, and the components and soft functions of the control Unit 2 can be used for control Processing of the electric Unit 5, wireless communication Processing of the near-field communication device 3, input/output Processing of sensor signals, and the like as necessary.
That is, in the elapsed time display system 30 or the electric machine 10, in order to achieve the object of the invention, it is not necessary to add any additional component, and it is not necessary to improve the performance in particular, and it is only necessary to slightly change the program while using the conventional arithmetic processing function and the memory element provided in the control device 9 in combination.
The elapsed time calculation section 13 calculates the total elapsed time T0 using the data on time read in the volatile memory 11. That is, the elapsed time calculation unit 13 calculates the difference between the start time WS in the nonvolatile memory 12 and the current time WR received by the control unit 2 from the external device 8, thereby calculating the total elapsed time T0 (WR-WS). The elapsed time calculation unit 13 may be included in the control unit 2.
The antenna 4 can transmit radio signals of industrial scientific medical band (for example, radio signals of 2.4GHz band and 920MHz band) in response to a command from the control unit 2 or the short-range communication device 3, and can communicate with an external device 8 (for example, a portable terminal, a setting-type arithmetic device, or the like) provided with a radio signal receiving device via a wireless line.
The electric machine 10 and the external device 8 can transmit and receive information to and from each other or unidirectionally using wireless communication using an arbitrary communication method (for example, a wireless LAN (Local Area Network) or Bluetooth (registered trademark)). That is, the antenna 4 can be used as a transmission unit and a reception unit for radio signals.
The electric machine 10 is operated by supplying power from the outside, and is stopped when the power supply from the outside is cut off. The supplied power supplies power to the control device 9, and is supplied to the electric section 5 in accordance with an operation command from the control device 9. The program of the IC installed in the control device 9 is recorded in the nonvolatile memory 12 and read when power is applied. The control device 9 does not operate when the power is turned off, but data such as settings changed during operation and information written via wireless communication are recorded in the nonvolatile memory 12 before the stop, and can be held until the next start.
Here, the flow of execution of the elapsed time calculation method (the present method) will be described with reference to fig. 2. Fig. 2 is an explanatory diagram showing data flows in the control devices 9 and 19 in the elapsed time display systems 30 and 31 and the electric machines 10 and 20.
When the power of the electric machines 10 and 20 is turned on, the control unit 2 supplies power to the electric unit 5 to start driving the mechanism unit 7. The electric machines 10 and 20 are in a state of being energized. When the power source of the electric machine 10 or 20 is turned on, for example, steps S1 to S3 are performed.
In step S1, the control unit 2 acquires the current time WR from the external device 8 via wireless communication at the time of activation, and writes the acquired current time WR in the nonvolatile memory 12. The control unit 2 may write the first received current time WR as the start time WS in the nonvolatile memory 12, including this case as step S1. In addition, as shown in step S5, the control unit 2 may receive the current time WR from the external device 8 and periodically perform the current time WR while the current is being supplied.
In step S2, the timer device 1 having the oscillation circuit counts the elapsed time T, which is the time from 0 second, based on the signal of the oscillation circuit, and notifies the controller 2 of the elapsed time T in accordance with the count. The control unit 2 writes the operating time TW and the energization time TE into the volatile memory 11 every time the elapsed time T is received (updates the operating time TW or the energization time TE based on the received elapsed time T if the operating time TW or the energization time TE has already been stored in the volatile memory 11).
The energization time TE is a time during which the power supply to the control unit 2 is continued from the present power-on of the electric machines 10 and 20. The operation time is a time during which the electric unit 5 continues to operate since the power supply of the electric machines 10 and 20 is turned on this time. In other words, the energization time TE and the operation time TW are both times from the present power-on of the electric machines 10 and 20.
The timepiece 1 is a clock having an oscillation circuit, and may be a so-called quartz clock. When the power supply to the electric machines 10 and 20 is cut off, the timer device 1 stops and cannot count the elapsed time T.
Then, in step S3, the controller 2 that is being energized reads the total operating time TW0 and the total energization time TE0 from the nonvolatile memory 12 to the volatile memory 11. When the electric machines 10 and 20 are started up for initial power supply access (for example, power supply access after shipment of the electric machines 10 and 20), the total operating time TW0 and the total energization time TE0 may be initial values (for example, zero).
The "total energization time TE 0" is an integrated time during which the control unit 2 is continuously supplied with power. "total operation time TW 0" is a cumulative time during which the electric unit 5 continues to operate.
The power supply of the electric machines 10 and 20 is cut off, for example, when a power supply cut-off operation is performed. In the electric machines 10 and 20 that have received the power shutoff operation, the elapsed time calculation unit 13 performs the following processing in step S4 before the power is actually shut off (for example, immediately before the shut off).
The elapsed time calculation unit 13 adds the operating time TW in the volatile memory 11 to the total operating time TW0 read from the nonvolatile memory 12 to the volatile memory 11, and overwrites the added value (TW + TW0) with the total operating time TW0 written in the nonvolatile memory 12. Thereby, total operating time TW0 is updated.
The elapsed time calculation section 13 adds the energization time TE in the volatile memory 11 to the total energization time TE0 read from the nonvolatile memory 12 to the volatile memory 11, and overwrites the added value (TE + TE0) on the total energization time TE0 written in the nonvolatile memory 12. Thereby, the total operating time TE0 is updated.
After step S4 ends, the power supply to the electric machines 10 and 20 is cut off. In order to cope with an unexpected power cut such as a power failure, the elapsed time calculation unit 13 may periodically execute step S4. In addition to step S4, step S3 may be performed immediately before cutting.
As a result, in the power-off state, the current time WR, the total energization time TE0, the total operating time TW0, and the start time WS are recorded in the nonvolatile memory 12. The start time WS may be a date and time when the electric machines 10 and 20 are initially supplied with power after the electric machines 10 and 20 are shipped.
For example, the control unit 2 may write the first received current time WR as the start time WS in the nonvolatile memory 12. Instead of such a date and time, the start time WS may be changed to an arbitrary date and time, for example, the date and time at the time of the operation test before shipment of the electric machines 10 and 20.
Assume that the power supply of the electric machines 10, 20 is switched in again. The control unit 2 receives the current time WR from the external device 8. The elapsed time calculation unit 13 calculates a difference between the start time WS in the nonvolatile memory 12 and the current time WR received by the control unit 2 from the external device 8, thereby calculating a total elapsed time T0 (WR — WS).
As described above, the control unit 2 may receive the current time WR from the external device 8 and periodically perform the current time WR while the power is being supplied. The total stop time TS0 may also be calculated each time the current time WR is received.
The elapsed time calculation unit 13 may calculate a total stop time TS0 (TE 0 — TW0) which is the difference between the total energization time TE0 and the total operating time TW 0. Further, the elapsed time calculation unit 13 may calculate a total cut-off time TD0 (T0 — TE0) which is the difference between the total elapsed time T0 and the total energization time TE 0.
At least one of the total elapsed time T0, the total stop time TS0, the total shut-off time TD0, the total operating time TW0, and the total energization time TE0 can be calculated in the control device 9. In addition, as shown in step S5, the control part 2 may receive the current time WR from the external device 8 periodically or arbitrarily while being energized.
Further, the control unit 2 may calculate at least one of the total elapsed time T0, the total stop time TS0, and the total disconnection time TD0 by reading the total energization time TE0, the total operating time TW0, and the start time WS from the nonvolatile memory 12 and transmitting the read time to the external device 8 via the short-range communication device 3 (step S6) while the electric machines 10 and 20 are energized, or at the moment when the electric machines 10 and 20 are to be disconnected.
Accordingly, the remaining life of the consumable parts used in the electric machines 10 and 20 can be calculated according to both the aged deterioration life and the operating life including the time elapsed during the power-off. The information on the remaining life and the like thus calculated can be appropriately displayed on the electric machines 10 and 20 if the electric machines are provided with their own state display function (display and the like).
Alternatively, the external device 8 such as a smartphone or a tablet terminal is notified and the replacement timing of the consumable supplies is displayed, thereby being able to prompt appropriate maintenance.
More specifically, in a smartphone carried by a service person or the like related to the manufacturer of the electric machines 10 and 20, a dedicated application is started to introduce and display information such as the remaining life related to the electric machines 10 and 20, and the smartphone can be presented to the user or owner (administrator or the like) of the electric machines 10 and 20 and prompt appropriate maintenance.
As described above, the electric machines 10 and 20 can display the accumulated usage time (for example, the total elapsed time T0) including the power-off time (the total off time TD0) based on the current time information (the current time WR) acquired by the short-range communication device 3 and the time information T recorded in the interior of the machine.
Therefore, even when the power supply is cut off, the electric machines 10 and 20 can count and display the cumulative use time (for example, the total elapsed time T0) including the stop period by the external connection information terminal device (the external device 8) or the like without having to constantly provide a battery of a system different from the main power supply.
Example 2
Fig. 3 is a block diagram showing a schematic configuration of an elapsed time display system 31 and an electric machine 20 according to embodiment 2 of the present invention. The electric machine 20 of embodiment 2 shown in fig. 3 is the same as the electric machine 10 of embodiment 1 shown in fig. 1, except that the battery 6 is added to the control device 19, which will be described later.
The electric machine 20 shown in fig. 3 includes a mechanism unit 7, an electric unit 5, and a control device 19 for electronically controlling power supply to the electric unit 5. The control device 19 includes the battery 6 in addition to the configuration having substantially the same control function as the control device 9 shown in embodiment 1. The battery 6 is electrically connected so as to be able to maintain a fully charged state by continuously receiving trickle charge or the like from the power supply control circuit while the control device 19 receives power supply.
When the electric machine 20 is supplied with electric power from the outside, the control device 19 is driven based on the electric power supplied from the outside. On the other hand, when the electric power supplied to the electric machine 20 is cut off, the electric power for operating the electric section 5 is not supplied, but the control device 19 is driven by the battery 6.
The electric machine 20 having such a configuration can obtain all the time data described in embodiment 1 from the timer device 1. In addition to the function of generating the continuous time information described in embodiment 1, the electric machine 20 obtains the total elapsed time T0 from the timer device 1 at any time without any special arithmetic processing as long as the battery 6 is sufficiently charged. In addition, within the range of the performance specification of the built-in battery 6, various high-performance displays may be exhibited. Conversely, each time the battery 6 is discharged, the functions having the lower priority may be omitted in order of being excluded.
As described above, the time data of both the total elapsed time T0 obtained without arithmetic processing and the elapsed time T obtained by arithmetic processing by the timer device 1 described in embodiment 1 can be used in some cases as needed. The case division means a case divided into a case where the battery 6 is sufficiently charged and a case where it is insufficient.
The electric machine 20 stores time data including the total elapsed time T0 in the nonvolatile memory 12 so that the effect of generating continuous time information by the arithmetic processing in the timer device 1 similar to that of embodiment 1 can be obtained even when the battery 6 is insufficiently charged and the starting power of the control device 19 is not satisfied due to a decrease in voltage or the like.
Further, the total elapsed time T0, the total stop time TS0, the total cut-off time TD0, the total operating time TW0, and the total energization time TE0 may be selected from highly accurate information for each of the battery-dependent system and the independent system. The battery-dependent system refers to information obtained by directly reading a clock maintained by the battery 6 without arithmetic processing.
The battery independent system refers to information calculated based on data in the nonvolatile memory 12 and the current time WR. In the case where the two are different from each other, the data continuity can be ensured by comparing the two and using the one having a larger numerical value.
In the true/false determination for 2 pieces of information, the following possibility is considered as a reason for determining that a smaller numerical value is false than a larger numerical value. For example, in a battery-independent state, old information may disappear due to a failure of the nonvolatile memory 12. In this case, instead of the erasure information, the calculation process is performed using the new time information written in the nonvolatile memory 12, and the result is less than the real elapsed time T.
Conversely, there is a failure occurring in the switching function from the battery-dependent system to the non-dependent state. In addition to the failure, if the clock of the timer device 1 is stopped for some reason, the result of the arithmetic processing becomes a smaller value, and therefore the smaller one is determined to be false.
Further, as described above, the air compressors are exemplified in embodiments 1 and 2 as the electric machines 10 and 20 shown in fig. 1 and 3, respectively, but the present invention is not limited thereto. The mechanism 7 of the electric machines 10 and 20 may be a machine tool or a conveying machine. Further, the electric machines 10 and 20 are preferably rotary motors, but are not limited thereto, and linear motors may be used as the electric unit 5. The electric machines 10 and 20 may be configured as separate circuit boards that electrically connect the control devices 9 and 19 to a power conversion circuit (not shown).
The elapsed time display systems 30, 31 according to the embodiments of the present invention can be summarized as follows.
[1] The elapsed time display systems 30, 31 include the electric machines 10, 20 and the external device 8 that performs short-range wireless communication thereon. The electric machines 10 and 20 include a timer device 1, a volatile memory 11, and a nonvolatile memory 12. The timer device 1 has an oscillation circuit and counts elapsed time from the start. The volatile memory 11 records data for calculating the total elapsed time T0.
The total elapsed time T0 is the time from the start time WS of writing in the nonvolatile memory 12 to the current time WR. The total elapsed time T0 is calculated by any one of the electric machines 10, 20 and the external device 8. For example, the external device 8 such as a smartphone may start a dedicated application, and display various numerical values calculated using information appropriately collected from the electric machines 10 and 20. The start time WS is the start time WS at which power is supplied to the electric machines 10 and 20, and is written in the nonvolatile memory 12. The current time WR is managed by the external device 8, and therefore does not stop regardless of ON/OFF of the electric machines 10 and 20.
According to the elapsed time display systems 30 and 31, the current time WR managed by the external device 8 and not stopped is appropriately acquired by the short-range wireless communication with the external device 8, and the power supply start time WS and the current time WR written in the nonvolatile memory 12 are read into the volatile memory 11 and subjected to arithmetic processing. Therefore, the cumulative use time including the stop period in which the power supply is cut off can be measured and displayed. The counted cumulative use time can be appropriately displayed by the external device 8 for short-range wireless communication. As the external device 8, for example, a smartphone, a tablet terminal, or the like is preferable.
The electric machines 10 and 20 according to the embodiments of the present invention can be summarized as follows.
[2] The electric machines 10 and 20 include a mechanism unit 7, an electric unit 5 for driving the mechanism unit 7, and control devices 9 and 19 for controlling power supply to the electric unit 5. The control devices 9 and 19 include a timer device 1, a control unit 2, a volatile memory 11, a nonvolatile memory 12, a short-range communication device 3, an antenna 4, and an elapsed time calculation unit 13.
The timer device 1 has an oscillation circuit and counts an elapsed time T from the start. The control unit 2 controls the power supply and receives the elapsed time T counted by the timer device 1. The volatile memory 11 is used for calculation performed by the control unit 2.
The nonvolatile memory 12 is written with the start timing WS of power supply by the control section 2. The short-range communication apparatus 3 performs wireless communication with the external device 8. The antenna 4 is connected to the short-range communication device 3 and transmits and receives a radio signal for wireless communication.
The elapsed time calculation unit 13 calculates a total elapsed time T0, which is the time from the start time WS written in the nonvolatile memory 12 to the current time WR indicated by the information received by the short-range communication device 3 from the external apparatus 8.
The electric machines 10 and 20 are often set to a relatively low price, and are designed to be connected to a power supply only during use. In this case, when not in use, power is not supplied to the control devices 9 and 19, and the timer device 1 is stopped. Therefore, information cannot be maintained except for the storage content of the nonvolatile memory 12, and it is difficult to maintain the continuity of the time information.
Then, the electric machines 10 and 20 perform appropriate wireless communication with the external device 8 via the short-range communication device 3 and the antenna 4 at, for example, the timing of turning ON/OFF the power supply, and obtain information of the current time WR. The nonvolatile memory 12 stores information of the current time WR at the timing of turning ON/OFF the power.
The elapsed time calculation unit 13 reads the stored information into the volatile memory 11, and the timer device 1 adds the time information obtained by counting the elapsed time T from the start time to the time information, thereby maintaining the continuity of the time information. Therefore, the electric machines 10 and 20 can more reliably count and display the cumulative use time including the stop period during which the power supply is cut off.
Thus, even in a simple electric machine, if the conventional circuit attached thereto, for example, a single chip microcomputer or the like includes a CPU, a volatile memory 11, a nonvolatile memory 12, and a program, the present invention can be easily realized by using the same. Thus, the cost increase is less. The purpose of the present invention is to more reliably count and display the cumulative use time including a stop period in which power supply is cut off, without the need for a battery.
[3] During the period from the start of power supply to the time when power supply is cut OFF, that is, at the timing of power ON/OFF, the control unit 2 reads the total energization time TE0 and the total operating time TW0 written in the nonvolatile memory 12 into the volatile memory 11. The value of the energization time TE and the operating time TW in the volatile memory 11 is updated based on the elapsed time T counted by the timer device 1 by the addition and accumulation.
That is, the total operating time TW0 is a cumulative value of the operating time TW based on the elapsed time T counted by the timer device 1, and is written in the nonvolatile memory 12, and is overwritten with the recalculated value. Similarly, the total energization time TE0 is also an accumulated value of the energization time TE based on the elapsed time T counted by the timer device 1, and the recalculated value is overwritten into the nonvolatile memory 12.
The total energization time TE0 is calculated as a total value of the total energization time TE0 in the volatile memory 11 and the energization time TE in the volatile memory 11, and is written in the nonvolatile memory 12. Similarly, the total operating time TW0 is calculated as the total value of the total operating time TW0 in the volatile memory 11 and the operating time TW in the volatile memory 11, and written in the nonvolatile memory 12.
The elapsed time calculation unit 13 calculates at least one of the total stop time TS0 and the total cut time TD0 in addition to the total elapsed time T0. The total stop time TS0 is the difference between the total energization time TE0 and the total operating time TW 0. The total cut-off time TD0 is the difference between the total elapsed time T0 and the total energization time TE 0.
Thereby, in addition to the total elapsed time T0, at least one of the total stop time TS0 and the total cut-off time TD0 can be calculated and appropriately displayed.
[4] The electric machine 20 of [2] constituting the elapsed time display system 31 of [1] has a control device 19. The control device 19 may incorporate a battery 6 for driving the same in the control device 19. In this case, while the remaining charge amount of the battery 6 is maintained at the predetermined value or more, the elapsed time T from the start time WS continuously calculated by the timer device 1 can be displayed with priority.
In addition, if the remaining charge amount of the battery 6 becomes equal to or less than a predetermined value due to long-term non-use, aged deterioration, or the like, the elapsed time T from the start time WS calculated by the elapsed time calculation unit 13 based on the difference between the start time WS written in the nonvolatile memory 12 and the current time WR indicated by the information received by the near-field communication device 4 from the external device 8 can be preferentially displayed. That is, the management may be switched to the management independent of the accumulated usage time of the battery 6.
Therefore, according to the electric machine 20, it is possible to manage the cumulative use time of the battery 6 without depending on the high performance. In addition, the cumulative use time continuously maintained by the timer device 1 may be managed within the range of the performance specification of the battery 6 incorporated therein.
[5] The electric machines 10 and 20 can compare the elapsed time T continuously calculated by the timer device 1 with the elapsed time T calculated by the elapsed time calculation unit 13, and can preferentially display the larger one. Thus, the true and false judgment can ensure the continuity of the data. For example, if the clock of the timer device 1 stops, the result of the arithmetic processing becomes a smaller numerical value, and therefore the smaller one is determined to be false. When the two are different, the two are compared and the larger value is adopted, so that the correctness can be ensured.
[6] The electric machines 10 and 20 may be provided with the antenna 4 outside the circuit board including the timepiece device 1. Thus, it is advantageous that the degree of freedom of design is further increased in consideration of the transmission/reception performance of the antenna 4 and the size and shape of the circuit board.
[7] The electric part 5 of the electric machines 10 and 20 may be a rotary electric motor.
[8] The electric part 5 of the electric machines 10 and 20 is also preferably a linear motor.
[9] In the electric machines 10 and 20, the control devices 9 and 19 and the power conversion circuit are preferably configured as separate (independent) circuit boards that are electrically connected. Thus, it is advantageous that the control devices 9 and 19 dedicated to the purpose of the present invention and the power conversion circuits corresponding to the various types of mechanism units 7 can be designed as separate units electrically connected to each other, which are optimized.
[10] The mechanism 7 of the electric machines 10 and 20 is preferably any one of an air compressor, a machine tool, and a conveyor. These are often used for a long period of several decades, and time information for maintaining continuity with a simple structure is required for the cumulative use time for managing the maintenance cycle for replacing a worn component. It is advantageous in that the requirement can be satisfied.
The electric machines 10 and 20 according to the embodiments of the present invention can be summarized as follows.
[11] The elapsed time calculation method has the following flow shown in steps S1 to S6.
First, in step S1, the start time WS of power supply to the electromotive part 5 of the electric machines 10 and 20 including the timepiece device 1 having the oscillation circuit is written in the nonvolatile memories 12 of the electric machines 10 and 20.
Next, during the energization period in which power is supplied, the flow shown in the following steps S2 to S6 is executed. In step S2, the timer device 1 having the oscillation circuit counts the elapsed time T, which is the time from 0 second, based on the signal of the oscillation circuit, notifies the control unit 2 of the elapsed time T in accordance with the count, and calculates the energization time TE and the operating time TW.
In step S3, the controller 2 that is being energized reads the cumulative time TW0 and TE0 from the nonvolatile memory 12 to the volatile memory 11.
In step S4, before the power supply is turned off, the elapsed time calculation section 13 adds the energization time TE and the operating time TW of the volatile memory 11 to the total energization time TE0 and the total operating time TW0 read from the nonvolatile memory 12 to the volatile memory 11, respectively, and overwrites the results to the nonvolatile memory 12. In step S5, information of the current time WR is received from the external apparatus by the short-range wireless communication.
Finally, in step S6, any one of the electric machines 10, 20 and the external device 8 calculates the total elapsed time T0. In addition to the total elapsed time T0, at least one of a total stop time, which is the difference between the total energization time TE0 and the total operating time TW0, and a total cut-off time TD0, which is the difference between the total elapsed time T0 and the total energization time TE0, is calculated.
As described above, the total elapsed time T0 is the time from the start time WS until the current time WR. The start time WS is written in the nonvolatile memory 12. The current time WR is managed by the external device 8. According to this elapsed time calculation method, the same operational effects as those of the electric machines 10 and 20 described in [3] above can be obtained.
[12] In the method of calculating the elapsed time of the electric machine 20, after the steps S1 to S3 are executed, when the remaining charge level of the battery 6 incorporated for driving the control device 19 becomes equal to or less than the predetermined value after the power supply is stopped, the electric machine 20 may execute the steps S2 to S6 without depending on the battery 6.
In step S1, even if the battery 6 is sound, the initial use time of the electric machine 20, that is, the initial start time WS, is written into the nonvolatile memory 12 of the electric machine 20, for example, in order to prevent the battery 6 from being damaged. In step S2, the timer device 1 calculates the energization time TE and the operating time TW without depending on the battery 6.
Steps S2 to S6 are also executed independently of the battery 6. Then, in step S6, at least the total elapsed time T0 is calculated. According to this elapsed time calculation method, the same operational effects as those of the electric machine 20 described in [4] above can be obtained.
Description of the reference numerals
1 a timing device, 2 a control unit, 3 a near field communication device, 4 an antenna, 5 an electric unit, 6 a battery, 7 a mechanism unit, 8 an external device, 9 and 19 a control device, 10 and 20 an electric machine (for example, an air compressor), 11 a volatile memory, 12 a nonvolatile memory, 30 and 31 an elapsed time display system, and WS start time.
Claims (12)
1. An elapsed time display system, comprising:
an electric machine; and
an external device capable of short-range wireless communication with the electric machine,
the electric machine includes:
a timer device for counting the time elapsed from the start, the timer device having an oscillation circuit;
a volatile memory; and
a non-volatile memory capable of being written to at the start of the supply of power to the electric machine,
either one of the electric machine and the external device calculates a time from the start time written in the nonvolatile memory to a current time managed by the external device as a total elapsed time.
2. An electric machine including a mechanism unit, an electric unit for driving the mechanism unit, and a control device for controlling power supply to the electric unit, characterized in that:
the control device includes:
a timer device for counting the time elapsed from the start, the timer device having an oscillation circuit;
a control unit that controls the power supply and receives an elapsed time counted by the timer;
a volatile memory for the calculation performed by the control unit;
a nonvolatile memory into which a start timing of the power supply can be written by the control unit;
a short-range communication means for performing wireless communication with an external device;
an antenna connected to the near field communication device; and
and an elapsed time calculation unit that calculates, as a total elapsed time, a time from the start time written in the nonvolatile memory to a current time indicated by information received by the near field communication apparatus from the external device.
3. The electrical machine of claim 2, wherein:
the control unit, during a period from the start of the power supply to the time when the power supply is cut off,
reading, from the volatile memory, a total energization time written in the nonvolatile memory, which is an accumulated value of energization time based on elapsed time counted by the timer means, and a total operating time written in the nonvolatile memory, which is an accumulated value of operating time based on elapsed time counted by the timer means,
updating the power-on time and the operating time in the volatile memory based on an elapsed time counted by the timer means,
calculating a total value of the total power-on time in the volatile memory and the power-on time in the volatile memory, writing the total value as the total power-on time in the nonvolatile memory,
calculating a total value of the total operating time in the volatile memory and the operating time in the volatile memory, and writing the total value as the total operating time in the nonvolatile memory,
the elapsed time calculation unit calculates at least one of a total stop time, which is a difference between the total energization time and the total operation time, and a total shut-off time, which is a difference between the total elapsed time and the total energization time, in addition to the total elapsed time.
4. An electrical machine according to claim 2 or 3, wherein:
a battery for driving the control device is built in the control device,
the elapsed time from the start time continuously calculated by the timer means can be preferentially displayed while the remaining charge level of the battery is maintained at a predetermined value or more,
when the remaining charge level of the battery is equal to or less than a predetermined value, the elapsed time calculation unit may preferentially display the elapsed time from the start time calculated by the start time calculation unit based on a difference between the start time written in the nonvolatile memory and a current time indicated by information received by the near field communication device from the external apparatus.
5. The electrical machine of claim 3, wherein:
the elapsed time continuously calculated by the timer device and the elapsed time calculated by the elapsed time calculation unit can be compared with each other, and a larger one can be preferentially displayed.
6. An electrical machine according to claim 2 or 3, wherein:
the antenna is provided outside a circuit board including the timing device.
7. An electrical machine according to claim 2 or 3, wherein:
the electric part of the electric machine is a rotary electric motor.
8. An electrical machine according to claim 2 or 3, wherein:
the electric part of the electric machine is a linear motor.
9. An electrical machine according to claim 2 or 3, wherein:
in the electric machine, the control device and the power conversion circuit are configured as different circuit boards that are electrically connected.
10. An electrical machine according to claim 2 or 3, wherein:
the mechanism portion of the electric machine is any one of an air compressor, a machine tool, and a conveying machine.
11. An elapsed time calculation method, comprising:
writing a start time of power supply to an electric part of an electric machine into a non-volatile memory of the electric machine, wherein the electric machine includes a timer device having an oscillation circuit;
during the period of power-on during which the power supply is performed,
a step in which a timer device having an oscillation circuit counts an elapsed time that is a time from 0 second based on a signal of the oscillation circuit, notifies a control unit of the elapsed time in accordance with the count, and calculates an energization time and an operation time;
reading, by a control unit during power-on, an accumulated time from the nonvolatile memory to a volatile memory;
a step of overwriting the write data into the nonvolatile memory by adding a power-on time and an operating time of the volatile memory to a total power-on time and a total operating time read from the nonvolatile memory to the volatile memory, respectively, which are executed by an elapsed time calculation unit before the power is turned off;
receiving information of a current time from an external device by short-range wireless communication;
either of the electromechanical and the external device,
calculating a total elapsed time which is a time from the start time written in the nonvolatile memory to a current time managed by the external device, and
and calculating at least one of a total stop time, which is a difference between the total energization time and the total operation time, and a total shut-off time, which is a difference between the total elapsed time and the total energization time, in addition to the total elapsed time.
12. The elapsed time calculation method according to claim 11, characterized in that:
after the steps from writing the start time WS of the power supply to the electric part of the electric machine into the non-volatile memory of the electric machine to reading the accumulated time from the non-volatile memory to a volatile memory by the control means during the power-on are performed,
when the remaining charge of a battery incorporated for driving the control device after the power supply is stopped is equal to or less than a predetermined value,
the timer means performs steps from the step of calculating the energization time and the operation time to the step of calculating at least the total elapsed time.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019136502A JP7312636B2 (en) | 2019-07-24 | 2019-07-24 | Elapsed time display system, electric machine, and method for calculating elapsed time |
| JP2019-136502 | 2019-07-24 | ||
| PCT/JP2020/023533 WO2021014830A1 (en) | 2019-07-24 | 2020-06-16 | Elapsed time display system, electric machine, and elapsed time calculation method therefor |
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| CN113490889A true CN113490889A (en) | 2021-10-08 |
| CN113490889B CN113490889B (en) | 2022-08-30 |
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| CN202080016592.XA Active CN113490889B (en) | 2019-07-24 | 2020-06-16 | Elapsed time display system, electric machine, and elapsed time calculation method for electric machine |
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| JP (1) | JP7312636B2 (en) |
| CN (1) | CN113490889B (en) |
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| CN102483623A (en) * | 2009-10-30 | 2012-05-30 | 欧姆龙株式会社 | Equipment state detection apparatus, equipment state detection method, and computer-readable recording medium |
| JP2018157647A (en) * | 2017-03-16 | 2018-10-04 | 日本電気株式会社 | Information processing apparatus, control device for power storage apparatus, electric power system, control method, and program |
| CN109426869A (en) * | 2017-08-29 | 2019-03-05 | 斗山英维高株式会社 | The consumables maintenance schedule information adjustment server and method of engineering machinery |
| CN110031217A (en) * | 2017-11-09 | 2019-07-19 | 住友重机械工业株式会社 | Life prediction system for deceleration device |
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| JPH04157507A (en) * | 1990-10-22 | 1992-05-29 | Mitsubishi Heavy Ind Ltd | Maintenance supporting device |
| JPH06320395A (en) * | 1992-10-26 | 1994-11-22 | Toyoda Mach Works Ltd | Inspection timing indicating device |
| JP2002149901A (en) * | 2000-11-08 | 2002-05-24 | Toshiba Corp | Stop time summing up system of equipment and stop time summing up method of equipment |
| EP3343689B1 (en) * | 2015-08-26 | 2024-02-14 | Nissan Motor Co., Ltd. | Deterioration degree estimation device and deterioration degree estimation method |
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- 2020-06-16 WO PCT/JP2020/023533 patent/WO2021014830A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102483623A (en) * | 2009-10-30 | 2012-05-30 | 欧姆龙株式会社 | Equipment state detection apparatus, equipment state detection method, and computer-readable recording medium |
| JP2018157647A (en) * | 2017-03-16 | 2018-10-04 | 日本電気株式会社 | Information processing apparatus, control device for power storage apparatus, electric power system, control method, and program |
| CN109426869A (en) * | 2017-08-29 | 2019-03-05 | 斗山英维高株式会社 | The consumables maintenance schedule information adjustment server and method of engineering machinery |
| CN110031217A (en) * | 2017-11-09 | 2019-07-19 | 住友重机械工业株式会社 | Life prediction system for deceleration device |
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| Publication number | Publication date |
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| JP2021022017A (en) | 2021-02-18 |
| CN113490889B (en) | 2022-08-30 |
| WO2021014830A1 (en) | 2021-01-28 |
| JP7312636B2 (en) | 2023-07-21 |
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