TWI824435B - Industrial machines and fluid machinery - Google Patents

Abstract

The present invention provides an industrial machine that can communicate with external terminals. It can respond to external attacks without involving complicated authentication or procedures. Operators can reliably connect to the machine when using it, so that the operating status can be confirmed and operated. wait. The industrial machine includes: an electric unit 105; a mechanical unit 107 driven by the electric unit 105; a control unit 103 that controls the power supplied to the electric unit 105; and a communication unit 109 that sends radio waves and connects the control unit 103 and The external terminal 201 is connected by wireless communication. The control unit 103 stops communication with the external terminal 201 using the communication unit 201 when the number of connection requests transmitted from the external terminal 201 to the communication unit 201 exceeds a predetermined number of times within a predetermined time.

Description

Industrial machines and fluid machinery

The present invention relates to a device capable of communicating with an external terminal, and particularly to an industrial device such as an air compressor installed in a factory.

Air compressors, which are industrial machines, are widely used both inside and outside buildings such as factories and construction sites to provide compressed fluid to places where they are needed. Stopping the air supply and controlling the air pressure must be operated through the operating part on the compressor control device.

In addition, in order to obtain information such as the pressure in the air tank and the operation status, the control device of the compressor must be operated and displayed on the display unit.

In any case, it is necessary to ensure that there is an operator near the air compressor. When the operator using tools, etc. at the end is informed of the status of the air compressor or when operating, he must move to the location of the air compressor. Operate and confirm the location.

Therefore, as a measure to improve work efficiency or convenience, a function that can check the status and operate the air compressor from a distance is required.

Regarding an air compressor that remotely monitors and operates an air compressor, the technology described in Patent Document 1 is known.

Patent Document 1 describes "an air compressor having: a motor driven by the supply of electricity from a commercial power source; a compressed air generating section that generates compressed air by being driven by the motor; and a tank, It stores the compressed air generated by the compressed air generating part; the control substrate controls the driving of the motor; and the main body side communication part transmits the main body information to an external terminal; thus, there is no need to move to an air compressor. The location can check the status of the air compressor."

Patent Document 1 describes an air compressor capable of exchanging data with an external terminal using wireless communication, but the confidentiality of communication contents is not considered. In this regard, Patent Document 2 describes a system that has a function of resetting identification information used to connect to a machine when it receives a specific attack from an external third party.

[Prior technical literature] [Patent Document] [Patent Document 1]

Japanese Patent Application Publication No. 2015-145662

[Patent Document 2]

Japanese Patent Application Publication No. 2019-121994

Patent Document 1 does not describe the confidentiality of communication contents, but Patent Document 2 responds to attacks from the outside by changing passwords or issuing notifications.

However, in these countermeasures, for example, when a communication connection request is continuously made to a device capable of communicating, assuming that the connection between the device and the terminal is 1:1 or n:1, it is impossible to transmit messages to the device from multiple terminals at the same time. connection requirements.

Therefore, when attacked by a third party, it is impossible to connect to the machine from other communication terminals, making it difficult to operate the compressor, thereby affecting the operation of the compressor.

Therefore, the object of the present invention is to provide a machine that can communicate with an external terminal. It can respond to external attacks without involving complicated authentication or procedures. The operator can reliably connect to the machine when using it, so that the operating status can be confirmed. , operation, etc.

In order to achieve the above object, the present invention is configured as follows.

The machine is provided with: an electric unit; a mechanism unit driven by the electric unit; a control unit that controls power supplied to the electric unit; and a communication unit that sends radio waves and wirelessly communicates with an external terminal. And connection; when the connection request transmitted from the external terminal to the communication unit exceeds a predetermined number of times within a predetermined time, the control unit stops communication with the external terminal using the communication unit.

According to the present invention, it is possible to provide a machine capable of communicating with an external terminal, which can respond to external attacks without involving complicated authentication or procedures. The operator can reliably connect to the machine when using it, so that the operating status can be confirmed, operated, etc. .

1-1,1-4,2-1,2-4,3-1,3-4: Spacer valve

1-2: No. 1 machine pump device

1-3,2-3,3-3: Check valve

1-5: Motor part of unit No. 1

1-6: Unit 1 power conversion device

1-7: Unit 1 control board

1-8: Wireless interface of unit 1

2-2: No. 2 machine pump device

2-5: Motor part of unit 2

2-6: Unit 2 power conversion device

2-7: Unit 2 control board

2-8: Wireless interface of unit 2

3-2: No. 3 machine pump device

3-5: Motor part of unit 3

3-6: Unit 3 power conversion device

3-7: Unit 3 control board

3-8: Wireless interface of unit 3

10:Wind

11: Lift truck

12:Control Department

13: Steel rope

14: Operation terminal

15:Liang

16:Mobile device

17:Migration Control Department

18:Transfer beam

20:Wire rope

30: Lifting goods

100:Air compressor

101:Display part

103:Control Department

104:Memory department

105:Electric department

107: Institutional Department

108:Operation Department

109: Ministry of Communications

110:Control device

111: Operating device

111: Transverse motor

112:Roll up motor

113,120: LED indicating the pressure in the tank

114: Operation status display LED

115: Operation button when communication is restored

116: Operation switch

117: Pressure vessel

118: Pressure sensor

119:Rotation sensor

121: Abnormal display LED

122: Communication recovery switch

123: Operation mode display LED

131:hook

141:Transportation Operation Department

142:Ministry of Communications

161:Transition motor

201:External terminal

300:Pump system

1111:Horizontal wheel

1112: Transverse axis

1121: Roll up encoder

1122:Reel

1123:Scroll

Figure 1 is a block diagram of the air compressor in Embodiment 1.

Fig. 2 is a block diagram of the control unit of the air compressor in Embodiment 1.

FIG. 3 is a diagram illustrating the certification sequence of the air compressor in Embodiment 1.

FIG. 4 is a flow chart of the connection operation of the communication unit in Embodiment 1.

FIG. 5 is a diagram showing an example of an operating portion of the air compressor in Embodiment 1. FIG.

Figure 6 is a block diagram of the air compressor in Embodiment 2.

7 is a block diagram of the control unit of the air compressor in Embodiment 2.

FIG. 8 is a connection flow chart of the communication unit in Embodiment 2.

Fig. 9 is a diagram showing an arrangement example of the air compressor operating portion in Embodiment 2.

Fig. 10 is a block diagram showing the connection relationship of the pump system in Embodiment 3.

Fig. 11 is a schematic structural diagram of the hoist according to the fourth embodiment.

Fig. 12 is a diagram explaining another structure of the hoist.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Example]

(Example 1)

In this embodiment, as an example of the machine, an air compressor mainly used for industrial purposes and disposed in a user or owner's location (factory, etc.) is used for explanation.

Figure 1 is a block diagram of the air compressor in Embodiment 1. FIG. 2 is a block diagram of the control device 110 in the first embodiment.

This Embodiment 1 is an example of an air compressor having a communication function.

In Figures 1 and 2, the air compressor 100 includes: a mechanical part 107, which is composed of a groove or a compression mechanism that stores air inside and applies force to the fluid; and an electric part 105, which is composed of a compressor that drives the compression mechanism. It is composed of a motor or a cooling fan; and a control device 110 that controls the power supplied to the electric part 105 through electronic devices.

The control device 110 is an IC (Integrated Circuit) (for example, a microcomputer or an FPGA (field programmable gate array), etc.) or an electronic component (for example, a field programmable gate array) used to control the electric part 105 and the display part 101 , resistors or capacitors, oscillator circuits, etc.), power components (such as transistors or relays, etc.) are mounted on an electronic circuit board on a printed circuit board using methods such as soldering.

The control device 110 includes: a control part 103, which is composed of circuit components for controlling the electric part 105 and a microcomputer or software function in the IC; and a communication part 109, which is composed of a circuit component that controls the electric part 105 The circuit components of the antenna and the microcomputer or software function composition in the IC; the display part 101 as the circuit component; and the operation part 108.

The display part 101 is a display component (LED (Light Emitting Diode) or liquid crystal, etc.) that can express numerical values, etc., and is used to display the air pressure or temperature of the mechanism part 107 of the air compressor 100.

The control unit 103 that controls the electric unit 105 and the communication unit 109 that assumes the communication function have different ICs and are provided as their software functions. The control unit 103 and the communication unit 109 are connected by electrical wiring and signal wiring as shown in FIG. 1 , and can exchange signals with each other. Information required for communication is stored in the memory unit 104 . The information required for communication refers to the information of the external terminal 201 where the connection authentication is completed normally.

In Embodiment 1, the control unit 103 performs operation control based on instructions from the operation unit 108 that accepts instructions from the outside.

The communication unit 109 supplies power to the antenna to transmit radio waves (for example, radio waves in the 2.4 GHz band), and can communicate using a wireless line with an external terminal 201 (for example, a mobile terminal or a built-in computing device) equipped with a radio wave receiving device.

The air compressor 100 and the external terminal 201 can use any communication method (such as a wireless LAN (Local Area Network), etc.) to send and receive electronic data to each other or in one direction using wireless communication. That is, the communication unit 109 can be used for both transmission and reception of radio waves.

The communication unit 109 is an integrated circuit (eg, System On a Chip, etc.) containing electronic components such as a CPU (Central Processing Unit) or a memory.

The air compressor 100 operates using the power supply from the outside, and stops when the power supply from the outside is cut off. The supplied power energizes the control device 110 and is supplied to the electric unit 105 in accordance with the operation command from the control device 110 . The program of the IC installed in the control unit 103 and the communication unit 109 is recorded in each non-volatile memory and is read when power is turned on.

In this embodiment 1, a communication method is adopted that realizes remote monitoring and remote operation functions to improve communication security. That is, in the first embodiment, as an example of wireless communication, Bluetooth Low Energy (hereinafter referred to as BLE), one of the communication standards of Bluetooth (registered trademark), which is one of the proximity communication standards, is used. BLE has a structure to safely start cryptographic communication at the beginning of the connection (hereinafter referred to as pairing). BLE exists in multiple versions due to specification changes. Here, versions 4.1 and later (for example, version 4.2, etc.) are set as objects.

Communication using BLE is performed between the air compressor 100 and the external terminal 201. The communication unit 109 supplies power to the antenna and transmits radio waves transmitting its own individual signals and service contents as data to the outside. Call it advertising.

The external terminal 201 has an antenna suitable for receiving the radio waves sent by the communication unit 109 and software capable of interpreting the contents of the radio waves, and uses wireless transmission according to the received signal of the communication unit 109. According to the connection requirements of the BLE standard.

When receiving a connection request from the external terminal 201, the communication unit 109 transmits the settings of security conditions to be used during the connection. Notify each other of the settings of safety conditions.

As an authentication method, either a key (passkey) display method or a numerical comparison method is provided. The key display method is a method in which the device that initiates the connection generates a password and displays the password on the display unit 101 . Then, the operator inputs the password displayed on the display unit 101 into the other machine, and checks the password generated in the one machine with the password input into the other machine to authenticate the connection.

The numerical comparison method is as follows: Random numbers calculated by a specific function are generated in the two machines that start the connection, and the passwords generated based on the mutually exchanged random numbers are displayed on each machine. When the passwords are consistent with each other, it is allowed Requests authentication of the connected machine to connect to. Authentication to allow connection only requires that the displayed password matches, for example, the operator agrees to connect to the machine requesting the connection.

The communication unit 109 directly cuts off the connection when the security condition of the external terminal 201 is lower than the required level of the communication unit 109 .

When the security conditions of the communication unit 109 and the security conditions of the external terminal 201 are conditions for encryption using authentication, the communication unit 109 generates a password and transmits a password input request to the external terminal 201.

The communication unit 109 performs data processing to convert the generated password into data that can be received by the control unit 103 (for example, Modbus format, etc.), and transmits the password data to the control unit 103 in a wired manner.

The control unit 103 replies to the communication unit 109 that the encryption data has been completely received.

The operator of the external terminal 201 visually confirms the password displayed on the display unit 101, inputs the password into the external terminal 201, and transmits the password from the external terminal 201 to the communication unit 109.

The communication section 109 compares the received password with the generated password. When the passwords match, the communication unit 109 delivers a temporary password key used to encrypt the communication content after the connection to the external terminal 201 . When the passwords are different, the communication unit 109 directly cuts off the connection.

FIG. 3 is a diagram illustrating the certification procedure of the air compressor 100 in Embodiment 1.

In FIG. 3 , the authentication procedure between the external terminal 201 and the communication unit 109 is called pairing. The communication unit 109 can pair with a plurality of external terminals 201 within the range allowed by the design specifications of the communication unit 109 . The external terminal 201 and the communication unit 109 that are paired with each other are in a state of being able to connect and communicate with each other.

The connection state refers to a state in which the external terminal 201 and the communication unit 109 are exchanging data keys, etc., regardless of whether they are paired or not. Of course, after pairing, you can send and receive data of 100 yuan from the air compressor. The state of the material is also called the connection state.

In addition, the sending and receiving of various data in the connection state is regarded as communication. In the connected state (during pairing authentication or communication after pairing), the advertisement in FIG. 3 is stopped, so other external terminals cannot receive advertisements from the communication unit 109, resulting in a state where the connection cannot be made.

A plurality of paired external terminals 201 and the communication unit 109 can be connected simultaneously and communicate with each external terminal 201 sequentially. However, when the design specification of the communication unit 109 is a design that only allows connection with a single external terminal 201, it cannot be connected to the second and subsequent external terminals 201.

Here, with respect to one communication unit 109, there is only one device that can pair the external terminal 201 and the communication unit 109 a plurality of times and connect simultaneously.

Therefore, when an operator using the air compressor 100 performs an operation of checking the status of the air compressor 100 body or changing the pressure remotely from a place where tools are used, other operators cannot connect to the air compressor 100 .

Furthermore, as described above in the state in which the communication unit 109 is not connected to any external terminal 201 for pairing (a state in which advertisements can be sent), the external terminal 201 must make a connection request for advertisements. When a connection request is made, as shown in FIG. 3 , the communication unit 109 temporarily enters a connection waiting state and performs mutual exchange of security setting notifications and the like.

Since the advertisement is not transmitted in the connection waiting state, it is essentially impossible to exchange connection requests with the communication unit 109 except for the external terminal 201 that is currently requesting a connection.

In order for the communication unit 109 to send the advertisement, it is necessary to make the password inconsistency, the passage of a fixed time, and the power supply again.

Here, when a third party other than the user of the air compressor 100 continuously and repeatedly requests the communication unit 109 in the form of connection request, pairing failure, reconnection request, pairing failure, etc., it is considered legal use. Otherwise, the communication unit 109 and the external terminal 201 cannot be connected.

The reason for this is that even the paired external terminal 201 cannot connect to the communication unit 109 without publicity, and therefore the connection cannot be made as long as the third party's connection request continues.

FIG. 4 is a flowchart of the connection operation between the communication unit 109 and the external terminal 201.

In step S1 of FIG. 4 , the communication unit 109 and the external terminal 201 are not connected.

In step S2, the communication unit 109 transmits radio waves, and in step S3, it is determined whether there is a connection from the external terminal 201. If there is no connection request from the external terminal 201, the process returns to step S1. If there is a connection request from the external terminal 201, the process proceeds to step S4.

In step S4, the communication unit 109 generates a password and requests the external terminal 201 to input the password. In step S5, the control unit 103 displays the password generated by the communication unit 109 on the display unit 101.

Then, in step S6, the communication unit 109 waits for a connection request from the external terminal 201. Then, in step S7, the communication unit 109 determines whether the waiting time for the connection request from the external terminal 201 reaches N seconds, which is a fixed time, and returns to step S1 when it reaches N seconds. In step S7, when the waiting time for the connection request from the external terminal 201 has not reached N seconds, the process proceeds to step S8.

In step S8, the communication unit 109 determines whether the password is received (received) from the external terminal 201. If the password is not received, the process returns to step S6.

In step S8, when the communication unit 109 receives (receives) the password from the external terminal 201, the process proceeds to step S9 to authenticate the received password and determine whether the password is correct. If the password is correct, in step S10, the state of connection with the external terminal is set. Then, in step S11, it is determined whether to continue the encryption communication, and if so, the process returns to step S10.

In step S11, when the communication unit 109 determines that the encryption communication is not to be continued, the process returns to step S1.

In step S9, if the password received from the external terminal 201 is incorrect, the process proceeds to step S12. The control unit 103 determines whether the number of authentications of the password transmitted from the same external terminal 201 is correct. The predetermined number of times (eg, 5 times) is reached within a predetermined time (eg, 1 minute). If the N times are not reached, return to step S1.

In step S12, if the number of password authentication times exceeds N times in one minute, the process proceeds to step S13, and the control unit 103 stops supplying power to the communication unit 109. By stopping the supply of power to the communication unit 109, radio wave transmission by the communication unit 109 is stopped, and communication with the external terminal 201 using the communication unit 109 is stopped.

Then, in step S14, the control unit 103 determines whether there is a communication recovery request from the operation unit 108. If not, it proceeds to step S15, sets the connection unavailable state, and returns to step S14. In step S14, the control unit 103 returns to step S1 according to the communication recovery request input from the operation unit 108, proceeds to step S2, and resumes the transmission of radio waves from the communication unit 109.

According to the connection operation flowchart shown in FIG. 4, it is possible to provide the air compressor 100 provided with the following function: when the number of authentications is N times or more within a specified time, it is determined that the connection request is from a malicious third party, and communication is temporarily stopped. Actions of Department 109.

The structure of the air compressor 100 of Embodiment 1 includes the control unit 103 for operating the air compressor 100 on the control board, the display unit 101, and the communication unit 109 for transmitting and receiving radio waves for communicating with the external terminal 201. .

The communication unit 109 receives power supply from the control unit 103 and transmits radio waves, but the communication unit 109 is not involved in the basic operation of the air compressor 100 .

Therefore, a threshold is set in the control unit 103, and when there are pairing requests exceeding the threshold number within a fixed period of time, the control unit 103 makes a determination, stops the power supply from the control unit 103 to the communication unit 109, and stops the radio wave transmission of the communication unit 109.

For example, if connection requests are repeated five or more times within one minute or password authentication fails, the power supply to the communication unit 109 is stopped and the promotion is completely stopped.

Even if the power supply to the communication unit 109 is stopped, the operation of the air compressor 100 side will not be affected, and the operation and control of the electric unit 105 or the mechanical unit 107 will continue. When the power supply to the communication unit 109 is stopped, the function of transmitting and receiving data using the communication unit 109 is stopped, and normal compressor operation can be performed without any problem.

The method of restoring the power supply to the communication unit 109 is performed by operating the operation unit 108 attached to the control unit 103 . The reason is that the machine to which the present invention is applied is located within the premises of its user or owner, so anyone who can access the machine and directly operate it is considered a legal user or owner.

FIG. 5 is a diagram showing an example of the operating portion 108 of the air compressor 100. The operation unit 108 includes an in-tank pressure display LED 113, an operation status display LED 114, a communication recovery operation button 115, an operation switch 116, and the like.

For example, a dedicated button may be provided for the operation button 115 during normal recovery, or an operation on the operation unit 108 that is not performed during normal operation may be set as a recovery condition. By using the communication for recovery The instructions for the operation are separated from the instructions for the normal operation of the compressor, and communication can be restored within a range that does not affect the normal operation (for example, two or more other than turning on/off (ON/OFF) by pressing and holding at the same time). buttons, etc.). Alternatively, the air compressor 100 itself may be restarted. Even if an operator near the air compressor 100 continuously performs authentication errors, the operation can be restored by simply operating the operating unit 108, so the operation of determining whether an attack is an attack or an erroneous operation can be omitted.

In addition, the power supply to the communication unit 109 must be restored close to the air compressor 100. When restarting, the closest operator's external terminal 201 is connected, so connection requests from the outside cannot be made.

Through the above process, the air compressor 100 can be protected from the occupation of the communication line due to improper connection request from a third party without affecting the normal operation of the air compressor 100 .

Furthermore, the software may be configured so that when a connection request is received after the radio wave transmission of the communication unit 109 is restored, the radio wave intensity of the external terminal 201 that has cut off the power to the communication unit 109 due to the pairing request is lower than the required level. When the set threshold value is reached, the connection request is rejected, the pairing request is cut off without moving to password authentication, and the connection request is accepted only when the radio wave intensity exceeds the set threshold value. In this case, the external terminal 201 of the operator who has completed pairing near the air compressor 100 can reconnect even if he is far away. However, in order to perform pairing, he must move to the vicinity of the air compressor 100. Therefore, it is possible to prevent the operator from being connected remotely. Line possession resulting from pairing requirements.

It may be configured so that the communication unit 109 can be powered off by operating the operation unit 108 . For example, when an operator near the air compressor 100 wants to connect, but is unable to collect publicity due to an attack from the outside, the power supply to the communication unit 109 can be cut off once by operating the operating unit 108 and then again. Start, thereby giving priority to the connection to the closest operator, so it can be connected.

In addition to the above countermeasures, the communication unit 109 may also have a whitelist function that uses the paired external terminal 201 as a module, and stores the whitelist in the memory unit 104 when consecutive pairing requests occur one after another. In this case, the power supply to the communication unit 109 is stopped, and then a lock is implemented for a fixed period so as not to respond to requests from external terminals 201 other than those included in the white list. At this time, the lock may be unlocked by the terminal that has completed the connection, or the lock may be unlocked by operating the operating unit 108 of the control device 110 . That is, after the control unit 103 resumes radio wave transmission by the communication unit 109, regarding the connection request received from the external terminal 201, it may be configured to accept only the connection request from the specific external terminal 201 stored in the memory unit 104.

In addition, the control unit 103 may not completely block the communication radio wave of the communication unit 109, but may control the output of the generated communication radio wave to reduce the intensity of the radio wave of the communication unit 109 and stop the communication between the communication unit 109 and the external terminal 201.

Furthermore, when a connection request is transmitted from the external terminal 201, the communication unit 109 determines whether the password transmitted from the external terminal 201 is correct. If the password is correct, it may connect to the external terminal 201. If the password is incorrect, it may be configured such that , so that the connection with the external terminal 201 is not connected, the information of the external terminal 201 with a correct password is stored in the memory unit 104, and the control unit 103 restores After the radio wave is transmitted from the communication unit 109, the received connection request is only accepted from the external terminal with the correct password stored in the memory unit 104.

As described above, according to Embodiment 1 of the present invention, a machine that can communicate with an external terminal can be provided. It can respond to external attacks without involving complicated authentication or procedures, and the operator can reliably connect to the machine when using it. This allows you to check the operating status and perform operations.

(Example 2)

Next, Example 2 of the present invention will be described. In this embodiment, as an example of a machine, an air compressor used mainly for industrial purposes and installed in a user or owner's location (factory, etc.) is used for explanation.

FIG. 6 is a block diagram of the air compressor 100 in Embodiment 2 of the present invention. Figure 7 is a block diagram of the control device 110 and the operating device 111 of the air compressor 100 in the second embodiment.

8 is a flowchart of the connection operation between the communication unit 109 and the external terminal 201 in the second embodiment.

Compared with Embodiment 1, Embodiment 2 is configured such that the operation part 108 is formed of a different substrate from the control part 103, and the module having the communication part 109 also serves as a control microcomputer of the operation part 108.

The air compressor 100 mainly includes: a mechanical part 107, which is composed of a tank (pressure container 117) or a compression mechanism that accumulates air pressure inside; and an electric part 105, which is composed of a motor that drives the compression mechanism. or a cooling fan; a control device 110 that controls the power supplied to the electric part 105 through electronic devices; and an operating device 111 that displays the pressure or operating status, communicates with the external terminal 201, and the air compressor 100 The operation signal is transmitted to the control device 110.

Furthermore, the air compressor 100 has: a pressure sensor 118 that detects the pressure of the pressure container 117; and a rotation sensor 119 that detects the rotation number of the motor in the electric part 105.

The control device 110 and the operating device 111 are ICs (for example, microcomputers or FPGAs, etc.), electronic components (for example, resistors, capacitors, oscillation circuits, etc.), and power components (for example, transistors or relays, etc.) used to control the electric part 105 ) An electronic circuit board mounted on a printed circuit board using soldering or other methods.

The control device 110 and the operating device 111 are connected in a wired manner, and the control unit 103 operates the air compressor 100 in response to an operation request from the operating device 111 .

Embodiment 2 is different from Embodiment 1 in that the communication unit 109 also controls the operation of the operation unit 108. Therefore, if the power supply to the communication unit 109 is stopped and the radio wave transmission of the communication unit 109 is stopped as in the first embodiment, then In Embodiment 2, the operation part 108 cannot be controlled, so that the operation control of the air compressor 100 cannot be performed.

In the case of the configuration of the second embodiment, the power supply to the communication unit 109 is not stopped as in the first embodiment. Instead, the power supply to the communication unit 109 is stopped according to the instruction of the control unit 103 as shown in the flowchart of FIG. 8 The propaganda radio wave is sent, and the control unit 103 continues to control the power of the electric unit 105. Control to prevent improper connection requests.

Explain according to the process in Figure 8.

In step S20 of FIG. 8 , the communication unit 109 and the external terminal 201 are not connected. In step S21, the communication unit 109 transmits radio waves, and in step S22, it is determined whether there is a connection from the external terminal 201. If there is no connection request from the external terminal 201, the process returns to step S20. If there is a connection request from the external terminal 201, the process proceeds to step S23.

In step S23, the connection is waited for, the password is displayed by button operation, and it is determined whether the password is received from the external terminal 201. If the password is received, the process proceeds to step S24. In step S24, the communication unit 109 waits for a connection request from the external terminal 201.

Then, in step S25, the communication unit 109 determines whether the waiting time for the connection request from the external terminal 201 reaches N seconds, which is a fixed time, and returns to step S20 when it reaches N seconds. In step S25, when the waiting time for the connection request from the external terminal 201 has not reached N seconds, the process proceeds to step S26 to bring the external terminal 201 and the communication unit 109 into a connected state.

Then, in step S27, when encrypted communication is continued, the process returns to step S26. In step S27, when the encryption communication is not continued, the process returns to step S20.

In step S23, if the password is not received, the process proceeds to step S28, it is determined that the connection fails, and the process proceeds to step S29. Then, in step S29, it is determined whether the number of connection failures is It does not reach N times in 1 minute. If it does not reach N times, return to step S20.

In step S29, if the number of connection failures is N times in 1 minute, the process proceeds to step S30. According to the instruction of the control unit 103, the radio wave output of the communication unit 109 is stopped, and only the radio wave output of the advertisement is stopped. Then, in step S31, it is determined whether there is a communication recovery request from the operation unit 108 to the communication unit 109. If there is no communication recovery request, the process proceeds to step S32, where the connection with the external terminal 201 is unavailable, and the process returns to step S31.

In step S31, if there is a communication recovery request, return to step S20.

In the structure of the second embodiment, since the communication module of the operating part 108 does not stop the power supply, it has no influence on the operation of the air compressor 100 .

In order to restart the supply of radio waves, a physical button on the operation unit 108 shown in FIG. 9 may be allocated as a reconnection button and then operated. In FIG. 9 , the operating unit 108 includes an in-tank pressure display LED 120 , an abnormality display LED 121 , a communication recovery switch 122 , and an operation mode display LED 123 .

Alternatively, the problem can be dealt with by controlling the output of the generated communication wave without completely cutting off the communication wave of the communication unit 109 . In this case, for example, by suppressing the output of radio waves to only reach a range of 1 m around the air compressor 100, it can be set in a state where only operators near the air compressor 100 can connect.

In addition, similar to Embodiment 1, the software may be formed so that when the radio wave intensity of the external terminal 201 cuts off the power supply to the communication unit 109 due to a pairing request, the value is lower than the set threshold value. , the pairing request can be cut off without moving to password authentication.

In addition, as in Embodiment 1, the memory unit 104 may be provided, and the communication unit 109 may have a white list function that uses the paired external terminal 201 as a module, so that the white list is stored in the memory unit 104, and the communication unit 109 can be used for consecutive pairings. When a connection request occurs, the power supply to the communication unit 109 is stopped and then locked for a fixed period so as not to respond to requests from external terminals 201 other than those in the white list.

In Embodiment 2, the same effects as those in Embodiment 1 can also be obtained.

Furthermore, since the radio wave intensity is controlled as in Embodiment 2, the risk of line occupation is slightly higher than if the communication unit 109 is completely cut off. However, security can be enhanced more easily, especially in the structure of suppressing the radio wave output. The operator can easily reconnect by approaching the air compressor 100, so it can be used without complicated operations or instructions.

(Example 3)

Next, Example 3 of the present invention will be described.

In the above-mentioned Embodiments 1 and 2, the example in which the present invention is applied to the air compressor 100 has been described, but the present invention can also be applied to different machines. In Example 3, an example in which the present invention is applied to a pump that is a fluid machine similar to an air compressor will be described. In Example 3 The structure of the control device and the communication operation flow are the same as those in Embodiment 1 or Embodiment 2, so illustrations and detailed descriptions are omitted.

FIG. 10 is a block diagram showing the connection relationship of a pump system 300 including a plurality of pump devices according to Embodiment 3 of the present invention. A pump device includes a pump unit having a casing as a flow path and an impeller installed in the casing, a motor unit that rotates the impeller, and a power conversion unit that supplies power to the motor unit and a communication unit that performs wireless communication with the outside. power conversion device.

In FIG. 10 , symbols 1-1, 1-4, 2-1, 2-4, 3-1, and 3-4 represent spacer valves. The symbol 1-2 represents the pump device of No. 1 machine, the symbol 2-2 represents the pump device of No. 2 machine, and the symbol 3-2 represents the pump device of No. 3 machine. Symbols 1-3, 2-3, and 3-3 represent check valves. The symbol 1-5 indicates the motor part of the No. 1 unit, the symbol 2-5 indicates the motor part of the No. 2 unit, and the symbol 3-5 indicates the motor part of the No. 3 unit.

In addition, the symbol 1-6 represents the power conversion device of the No. 1 unit, the symbol 2-6 represents the power conversion device of the No. 2 unit, and the symbol 3-6 represents the power conversion device of the No. 3 unit. Symbols 1-7 represent the control circuit board of unit No. 1, symbols 2-7 represent the control circuit board of unit No. 2, and symbols 3-7 represent the control circuit board of unit No. 3. In addition, symbols 1-8 represent the wireless interface of unit No. 1, symbols 2-8 represent the wireless interface of unit No. 2, and symbols 3-8 represent the wireless interface of unit No. 3.

The power conversion device can be installed integrally with each pump and motor, or a plurality of power conversion devices can be integrated into one control panel and installed on a wall, etc. In this case, instead of each power conversion device, the communication unit may be provided as one communication unit in the control panel.

For example, if the data you want to set is sent from a mobile terminal (not shown) as an external terminal, (data item and data content), then the data is written into the memory part of the pump control data through the wireless interface (1-8, 2-8, 3-8) of the pump device 1-2, 2-2, 3-2 middle. In this case, in order to clarify the target of the data transmission, the identification numbers of the pump devices 1-2, 2-2, and 3-2 are sent together with the data. The wireless interface or memory unit is assembled into the control & I/F (1-8, 2-8, 3-8) of the pump device 1-2, 2-2, 3-2.

The mobile terminal described above is preferably provided with a display device.

Secondly, if an instruction to obtain the operation status is given from the mobile terminal, the pump operation data will be self-memorized through the wireless interface (1-8, 2-8, 3-8) of the pump device 1-2, 2-2, 3-2. Read the operation status data from the memory unit, and send the read data to the mobile terminal through the wireless interface (1-8, 2-8, 3-8).

In addition, when the pump is operated from the mobile terminal, the operation/stop command can be given and the frequency of operation (number of motor revolutions) can be set in the same manner as setting the data. Specify the data item related to the operating status of the pump device instead of the "run/stop "command"". When you want to make it run, set "run" to the data. When you want to stop it, set "run" to the data. You can also set "stop" for data.

As shown in Figure 10, when there are three or more pump devices 1-2, 2-2, and 3-2, the priority order can be set in advance for the pump devices 1-2, 2-2, and 3-2. The pump unit with the highest order is designated as the main pump unit. Alternatively, after the pump devices 1-2, 2-2, and 3-2 become in the operating state (after power is supplied), the priority order of the pump devices 1-2, 2-2, and 3-2 may be determined, and the priority order may be determined. The highest pump unit is designated as the main pump unit.

When the main pump device is set, it may also be configured such that only the communication unit of the main pump device communicates with the mobile terminal, other pump devices transmit operation information, etc. to the communication unit of the main pump device, and the main pump device transmits the information to the communication unit of the main pump device. After collection, it is sent to the mobile terminal.

In this way, the communication unit of each pump device 1-2, 2-2, 3-2 (or the communication unit of the main pump device) communicates with the mobile terminal, and when the line is occupied due to a connection request, it will communicate with the mobile terminal. Communication is cut off and operation as a pump device continues.

Of course, the pump system of the present invention can also be applied when the number of pump devices is one.

According to Embodiment 3, a pump system as a fluid machine that can communicate with an external terminal can be provided. It can respond to external attacks without involving complicated authentication or procedures, and the operator can reliably connect to the machine when using it, so that it can be performed Confirmation and operation of operating status, etc.

Furthermore, in Embodiment 3, software may be formed such that when the radio wave intensity of the external terminal 201 that cuts off the power supply to the communication unit 109 due to a pairing request is lower than a set threshold value, , the pairing request can be cut off without moving to password authentication.

Alternatively, the power supply to the communication unit 109 may be turned off by operating the operation unit 108 .

Alternatively, the communication unit 109 may have a whitelist function that uses the paired external terminal 201 as a module, and the whitelist may be stored in the memory unit 104, and when a continuous pairing request connection occurs, In this case, the power supply to the communication unit 109 is stopped, and then a lock is implemented for a fixed period so as not to respond to requests from external terminals 201 other than those in the white list.

Alternatively, the problem can be dealt with by not completely blocking the communication wave of the communication unit 109 but by controlling the output of the generated communication wave.

(Example 4)

Next, Example 4 of the present invention will be described.

The present invention can also be applied to machines other than the fluid machines illustrated in Embodiments 1 to 3. In this Embodiment 4, as an example of a machine, an example in which the present invention is applied to a hoist (also called a crane or hoist) installed in a factory will be described.

Embodiment 4 mainly relates to a hoist for transporting cargo that can be hoisted by a wire rope, and in particular, to a hoist that transports the trolley by tensioning the wire rope before lifting off the ground to reduce the vibration of the cargo when it is lifted off the ground. In addition, the present invention is also applicable to cranes that transport suspended cargo in the same manner.

The structure and communication operation flow of the control device in Embodiment 4 are the same as those in Embodiment 1 or 2, so illustration and detailed description are omitted.

FIG. 11 is a schematic structural diagram of the hoist 10 according to the fourth embodiment.

In FIG. 11 , the cargo 30 to be transported is suspended from the hook 131 by the wire rope 20 . hook 131 is suspended from the drum 1122 by the steel cable 13. Here, the hanging cargo 30 may also be directly suspended from the hook 131 without passing through the wire rope 20 .

The reel 1122 is connected to the take-up motor 112 and the take-up encoder 1121 via the reel 1123, and is arranged in the trolley 11. Thereby, by rotating the winding motor 112, the steel rope 13 is rolled up or down, and the hoisted cargo 30 can be transported in the z direction in FIG. 11 . This conveyance in the z direction is called rolling up.

The traverse wheel 1111 is connected to the traverse motor 111 via a traverse shaft 1112 and is arranged on the trolley 11 . In addition, the traverse wheel 1111 is configured to rotate on the beam 15 by the rotation of the traverse motor 111, thereby generating driving force. Thereby, by rotating the traverse motor 111, the trolley 11 and the crane 30 can be conveyed along the beam in the x direction in FIG. 11 . This conveyance in the x direction is called transverse movement.

The conveyance operation unit 141 is provided in the operation terminal 14, and the operator inputs a conveyance operation signal that is a command for traversing or rolling up, or both operations. The input transfer operation signal is sent to the control unit 12 via the communication unit 142 .

The control unit 12 generates a transportation command based on the input transportation operation signal or the transportation signal based on the initial vibration reduction function described below, and drives the traverse motor 111 or the winding motor 112, or both. With this, the hoisted cargo 30 moves horizontally and is rolled up.

Furthermore, the lifting cargo 30 and the wire rope 20 are objects to be transported and are not components of the hoist 10 . In addition, the fixture used for hanging the cargo 30 is not limited to the steel wire rope 20, and may also be without the steel wire rope 20.

In addition, the communication unit 142 provided in the operation terminal 14 may perform wired communication or wireless communication.

In addition to the communication unit 142 for control, the operation terminal 14 also includes another communication unit (not shown) for performing short-range wireless communication with the external terminal 201 . By forcibly separating the communication unit 142 from other communication units, when the line is occupied due to multiple pairing requests, the line can be cut off and the control of the hoist in the fourth embodiment can be continued.

Regarding the operation button for resuming the radio wave transmission of the communication unit of the external terminal 201, a specific operation can be performed using the transport operation unit 141, or a separate button (not shown) can be provided.

Next, another structure of the hoisting machine 10 will be described with reference to FIG. 12 .

As shown in FIG. 12 , the beam 15 is connected to the traveling beam 18 via the traveling device 16 . The moving device 16 rotates the moving motor 161 to move the beam 15 along the moving beam 18 in the y direction in FIG. 12 . Thereby, the trolley 11 connected to the beam 15 and the crane 30 (refer to FIG. 11 ) hung on the hook 131 are transported in the y direction in FIG. 12 . This transportation in the y direction is called migration.

The transport operation signal input to the transport operation unit 141 (see FIG. 11 ) provided in the operation terminal 14 has a shift command signal in addition to the horizontal row and roll-up command signals. Among the input transport operation signals, at least the movement command signal is transmitted to the movement control unit 17 via the communication unit 142 (see FIG. 11 ).

The transfer control unit 17 controls the transfer based on the transfer operation signal or the following initial vibration reduction function. A signal is sent to generate at least a transport command related to the movement, and the movement motor 161 is driven.

Thereby, the hanging cargo 30 (refer to FIG. 11) not only moves horizontally and is rolled up, but also moves.

Furthermore, in Embodiment 4, software may be formed such that when the radio wave intensity of the external terminal 201 that cuts off the power supply to the communication unit 109 due to a pairing request is lower than a set threshold value , the pairing request can be cut off without moving to password authentication.

Alternatively, the power supply to the communication unit 109 may be turned off by operating the operation unit 108 .

In addition, the communication unit 109 has a white list function that allows the external terminal 201 that has been paired to be used as a module. The white list is stored in the memory unit 104, and when continuous pairing requests occur continuously, the power supply to the communication unit 109 is stopped. , and then implement locking within a fixed period so as not to respond to requests from external terminals 201 other than those in the whitelist.

Alternatively, the problem can be dealt with by not completely blocking the communication wave of the communication unit 109 but by controlling the output of the generated communication wave.

According to Embodiment 4, it is possible to provide a hoist as a machine that can communicate with an external terminal. It can respond to external attacks without involving complicated authentication or procedures, and the operator can reliably connect to the machine when using it, so that the operating state can be performed. Confirmation, operation, etc.

In addition, here, it has been described that the control unit 12 generates transverse and rolling transport instructions, and the transfer control unit 17 generates a transfer transfer command, but the present invention is not limited to this configuration.

For example, the control unit 12 may also generate conveyance speed instructions for horizontal movement, movement, and roll-up, and at least instructions related to movement among the generated transportation instructions may be sent from the control unit 12 to the movement control unit 17 , and the movement control unit 17 is based on The received transport command drives the moving motor 161 .

In this case, the above-mentioned transport operation signal only needs to be transmitted to at least the control unit 12 and does not need to be transmitted to the transfer control unit 17 .

Furthermore, the present invention can also implement a communication control method for machines.

That is, the present invention is a communication control method for a machine including: an electric unit 105; a mechanism unit 107 driven by the electric unit 105; a control unit 103 that controls the power supplied to the electric unit 105; and a communication unit. 109, which sends radio waves to connect the control unit 103 and the external terminal 201 through wireless communication; and the communication control method of the device is to determine whether the connection request transmitted from the external terminal 201 to the communication unit 109 exceeds a specified number of times within a specified time. , when the predetermined number of times is exceeded, communication with the external terminal 201 using the communication unit 109 is stopped.

The embodiments have been described above. However, the present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-mentioned embodiments are described in detail to facilitate understanding of the present invention, and are not necessarily limited to having all the configurations described. In addition, part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and other components can also be added to the configuration of a certain embodiment. Structure of the embodiment. In addition, it is also possible to add, delete, or replace part of the components of each embodiment with other components.

100:Air compressor

101:Display part

103:Control Department

105:Electric department

107: Institutional Department

108:Operation Department

109: Ministry of Communications

110:Control device

201:External terminal

Claims (12)

An industrial machine is provided with: an electric unit; a mechanism unit driven by the electric unit; a control unit that controls the power supplied to the electric unit; and a communication unit that transmits radio waves and transmits the control unit Connected to an external terminal through wireless communication; the control unit stops communication with the external terminal using the communication unit when the connection request transmitted from the external terminal to the communication unit exceeds a predetermined number of times within a predetermined time; And when the radio wave transmission of the above-mentioned communication part stops, the above-mentioned control part continues the power control of the above-mentioned electric part. The industrial machine of claim 1, wherein when the connection request is transmitted from the external terminal, the communication unit determines whether the password transmitted from the external terminal is correct, and when the password is correct, connects to the external terminal, In the event that the above password is incorrect, the connection to the above external terminal will be in an unconnected state. The industrial device of claim 1, wherein when the connection request from the external terminal is transmitted from the same external terminal and exceeds a predetermined number of times within a predetermined time, the radio wave of the communication unit is stopped. to send. The industrial device of claim 1 further includes an operation unit that accepts instructions from the outside, and the control unit, after stopping the transmission of radio waves from the communication unit, resumes the communication from the above operation unit based on a communication recovery request input from the operation unit. Radio transmission of the Ministry of Communications. The industrial machine of Claim 4, wherein when the connection request is transmitted from the external terminal, the communication unit determines whether the password transmitted from the external terminal is correct, and when the password is correct, connects to the external terminal, When the above-mentioned password is incorrect, the connection with the above-mentioned external terminal is made unconnected, and the machine further has a memory unit that memorizes the information of the above-mentioned external terminal with the above-mentioned password being correct, and the above-mentioned control unit restores the information from the above-mentioned communication unit. After the radio wave is sent, the received connection request only accepts the connection request from the above-mentioned external terminal with the correct password stored in the above-mentioned memory unit. An industrial device according to claim 4, wherein after the radio wave transmission from the communication unit is restored, the received connection request is accepted only when the radio wave intensity exceeds a set threshold value. An industrial machine according to Claim 1, wherein after the radio wave transmission from the above-mentioned communication unit is restored, the received connection request is less than When the radio wave intensity of the threshold is set, the connection request will be rejected. An industrial device according to Claim 1, wherein the control unit reduces the radio wave intensity of the communication unit and stops communication with the external terminal. Such as the industrial machine of claim 1, wherein the above machine is configured for use at the location of the user or owner. A fluid machine is provided with: an electric part; a mechanism part that is driven by the electric part to apply force to the fluid; a control part that controls the power supplied to the electric part; and a communication part that sends radio waves and transmits them to the fluid. The control unit and the external terminal are connected by wireless communication; the control unit stops the transmission of the radio wave by the communication unit when the connection request transmitted from the external terminal to the communication unit exceeds a predetermined number of times within a predetermined time; And when the radio wave transmission of the above-mentioned communication part stops, the above-mentioned control part continues the power control of the above-mentioned electric part. The fluid machine of claim 10, wherein when the connection request from the external terminal is sent from the same external terminal and exceeds a predetermined number of times within a predetermined time, the radio wave of the communication unit is stopped. to send. The fluid machine of claim 10 further includes an operation unit that accepts instructions from the outside, and the control unit, after stopping the transmission of radio waves from the communication unit, resumes the communication unit from the communication unit based on a communication recovery request input from the operation unit. sent by radio waves.