TWI384725B - Electric actuator - Google Patents

Description

Electric actuator

The present invention relates to an electric actuator in which an electric motor for driving a valve is disposed in a casing.

Conventionally, electric actuators have been used for opening and closing of rotary valves or direct acting valves used in air conditioning equipment, mechanical equipment, and the like. In such an electric actuator, various electrical components and mechanical components such as an electric motor and a speed reduction mechanism are usually disposed in one casing, and the output shaft is protruded from a casing in which the various electrical components and mechanical components are disposed. In addition, a conduit is provided in the casing for introducing a wire connected to an external power source and a signal line for outputting a valve opening signal.

Further, such an electric actuator is attached to a valve provided with a valve body and integrated to serve as an electric control valve. At this time, the output shaft of the electric actuator and the valve shaft of the valve body (the shaft for fixing the valve body shaft) are coupled via a joint. In addition, the casing of the electric actuator is bolted to the valve.

In addition, when the electric actuator is integrated with the valve and is an electric control valve, it is conceivable to provide a waterproof structure that prevents rainwater or the like from penetrating into the casing. For example, a waterproof structure is adopted in which an electric actuator is mounted above a valve, considering that rainwater or the like falls from above the casing, that is, it is considered to receive rainwater from the top surface of the casing, and on the top surface of the casing No opening is provided (for example, refer to Patent Document 1).

Patent Document 1: Japanese Unexamined Patent Publication No. 2-25785

Patent Document 2: Japanese Laid-Open Patent Publication No. 2000-337551

Patent Document 3: Japanese Patent Laid-Open No. Hei 10-61809

Patent Document 4: Japanese Laid-Open Patent Publication No. Hei 8-285131

Patent Document 5: Japanese Patent Laid-Open No. Hei 5-172571

Patent Document 6: Japanese Laid-Open Patent Publication No. 2003-287421

Patent Document 7: Japanese Laid-Open Patent Publication No. Hei 8-334327

Patent Document 8: Japanese Laid-Open Patent Publication No. 2000-97695

Patent Document 9: Japanese Patent Laid-Open No. Hei 7-35548

However, in the field where the above-described electric regulating valve is provided, the electric actuator sometimes has to be mounted below the valve due to the limitation of the piping height and space in which the electric regulating valve is mounted. In this case, the bottom surface of the casing faces upward, and the rainwater is received by the bottom surface of the casing facing upward. Therefore, the rainwater penetrates into the casing through the gap between the output shaft and the casing or the gap between the conduit and the electric wire, thereby making the inside The parts are degraded.

In addition, even in the field where the electric regulating valve is installed in a normal state, the bolt of the fixed casing is loosened by vibration due to the vibration (the vibration from the outside and the vibration of the fluid flowing through the valve) greatly affects the electric actuation. The installation posture of the device changes from the initial state. When this state is ignored, it is easy to cause bending stress, deformation, or damage of the output shaft and the valve shaft of the electric actuator.

Conventionally, the mounting posture of the electric actuator or the like has not been particularly noticed, and when the electric actuator is malfunctioning, when the maintenance person who goes to the site confirms, it is known that the cause of the malfunction is an abnormal installation of the electric actuator.

Further, in Patent Document 2, a humidity sensor is provided in the casing to detect the infiltration of water into the casing. At this time, if water penetrates into the casing, the temperature inside the casing rises, and the inside of the casing becomes a state of high temperature and humidity. The state of the high temperature and humidity was detected by the humidity sensor, and it was judged that water infiltrated into the casing. However, in this method, although it is possible to detect the case where rainwater is infiltrated into the casing, it is impossible to know that the rainwater may infiltrate beforehand. Further, it is impossible to detect that rainwater has infiltrated into the casing until the inside of the casing becomes hot and humid. In addition, no countermeasure against damage caused by the change in the mounting posture of the electric actuator was taken.

In addition to the patent document 2, there is an electric drive device that measures the water in the casing (see, for example, Patent Documents 3 and 4). However, these electric drive devices take measures against dew condensation generated inside the casing. The device cannot handle the rainwater from the outside. Further, similarly to the cited document 2, countermeasures against damage caused by changes in the mounting posture of the electric actuator have not been taken.

The present invention has been made to solve the above problems, and an object of the invention is to provide an electric actuator capable of knowing in advance that damage may occur due to infiltration of rainwater or a change in a mounting posture, and countermeasures are taken in advance.

In order to achieve the above object, the present invention provides an electric actuator in which an electric motor for driving a valve is disposed in a casing, and is provided with: a tilt angle sensor disposed in the casing for measuring electric actuation The tilt angle of the device; the transmitting means transmits the information on the mounting posture of the electric actuator obtained based on the tilt angle measured by the tilt angle sensor to the external device.

According to the invention, the tilt angle of the electric actuator is measured by the tilt angle sensor provided in the casing, and the mounting posture related information of the electric actuator obtained based on the tilt angle is transmitted to the external device. For example, in the present invention, the tilt angle measured by the tilt angle sensor is transmitted to the external device as the mounting posture related information of the electric actuator. At this time, the maintenance person can know the installation posture of the electric actuator based on the transmitted inclination angle, and if the installation posture of the electric actuator is reversed, it can be judged that rainwater may infiltrate, and if the installation posture of the electric actuator is relatively high, Large changes can be judged as possible deformation or breakage of the output shaft and the valve shaft.

In the present invention, the information on the mounting posture of the electric actuator obtained from the tilt angle measured by the tilt angle sensor is not limited to the tilt angle measured by the tilt angle sensor. For example, a normal installation posture storage means may be provided to store the normal installation posture related information of the electric drive as a normal installation posture; the current installation posture creation means, based on the inclination angle measured by the inclination angle sensor, the electric actuator At present, the installation posture related information is used as the current installation posture; and the installation posture determination means compares the normal installation posture with the current installation posture to determine the normal/abnormality of the current installation posture of the electric actuator; and determines the installation posture determination means. As a result, the installation posture related information as the electric actuator is transmitted to the external device.

In addition, an initial installation posture storage means may be provided, and the initial installation posture related information of the electric actuator is stored as an initial installation posture; the current installation posture creation means is electrically actuated according to the inclination angle measured by the inclination angle sensor. The current installation posture related information of the device is used as the current installation posture; and the installation posture determination means compares the initial installation posture with the current installation posture to determine the normal/abnormality of the current installation posture of the electric actuator; The result of the determination is transmitted to the external device as information on the mounting posture of the electric actuator.

In addition, a normal installation posture storage means may be provided, and the normal installation posture related information of the electric actuator is stored as a normal installation posture; the current installation posture creation means is electrically actuated according to the inclination angle measured by the inclination angle sensor. The current installation posture related information of the device is used as the current installation posture; and the installation posture offset calculation means calculates the offset of the installation posture of the electric actuator according to the difference between the normal installation posture and the current installation posture; The shift amount calculation means calculates the offset amount and transmits it to the external device as the mounting posture related information of the electric actuator.

In addition, an initial installation posture storage means may be provided, and the initial installation posture related information of the electric actuator is stored as an initial installation posture; the current installation posture creation means is electrically actuated according to the inclination angle measured by the inclination angle sensor. The current installation posture related information of the device is used as the current installation posture; and the installation posture offset calculation means calculates the offset of the installation posture of the electric actuator according to the difference between the initial installation posture and the current installation posture; The shift amount calculation means calculates the offset amount and transmits it to the external device as the mounting posture related information of the electric actuator.

In addition, a normal installation posture storage means may be provided, and the normal installation posture related information of the electric actuator is stored as a normal installation posture; the current installation posture creation means is electrically actuated according to the inclination angle measured by the inclination angle sensor. The current installation posture related information of the device is used as the current installation posture; the installation posture offset calculation means calculates the offset of the installation posture of the electric actuator according to the difference between the normal installation posture and the current installation posture; the normal range threshold storage means And storing a threshold value of a normal range of the mounting posture shift amount of the electric actuator as a normal range threshold value; and mounting posture determining means for shifting the mounting posture calculated by the mounting posture shift amount calculating means to a normal range The threshold is compared to determine the normal/abnormality of the current mounting posture of the electric actuator, and the result of the determination of the mounting posture determining means is transmitted to the external device as the mounting posture related information of the electric actuator.

In addition, an initial installation posture storage means may be provided, and the initial installation posture related information of the electric actuator is stored as an initial installation posture; the current installation posture creation means is electrically actuated according to the inclination angle measured by the inclination angle sensor. The current installation posture related information of the device is used as the current installation posture; the installation posture offset calculation means calculates the offset of the installation posture of the electric actuator according to the difference between the initial installation posture and the current installation posture; the normal range threshold storage means And storing the threshold of the normal range of the mounting posture shift amount of the electric actuator as the normal range threshold; and the mounting posture determining means, the offset of the mounting posture calculated by the mounting posture offset calculating means and the normal range The threshold is compared to determine the normal/abnormality of the current mounting posture of the electric actuator, and the result of the determination of the mounting posture determining means is transmitted to the external device as the mounting posture related information of the electric actuator.

According to the present invention, the tilt angle of the electric actuator is measured by the tilt angle sensor provided in the casing, and the mounting posture related information of the electric actuator obtained based on the tilt angle is transmitted to the external device, According to the information on the mounting posture of the electric actuator to be transmitted, it is known in advance that damage may occur due to the infiltration of rainwater or the change in the mounting posture, and countermeasures may be taken in advance.

Hereinafter, the present invention will be described in detail based on the drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the main part of an embodiment of an electric actuator according to the present invention. In the figure, a 100-type electric actuator according to the present invention is attached to a valve 200 provided with a valve body, and is integrated as an electric control valve. In addition, information is received and transmitted between the external controller 300 and the external controller 300.

The electric actuator 100 includes a control circuit 1, a nonvolatile memory 2, an A/D converter 3, a communication line 4, a multiplexer 5, a setting input circuit 6, an electric motor 7, and a motor drive circuit 8. The feedback circuit 9, the speed reduction mechanism 10, and the tilt angle sensor 11 are disposed in the casing 12. The casing 12 is bolted to the valve 200.

In the electric actuator 100, the tilt angle sensor 11 measures the tilt angle θx in the X-axis direction of the electric actuator 100, the tilt angle θy in the Y-axis direction, and the tilt angle θz in the Z-axis direction, and This is supplied to the control circuit 1 as the inclination angle θ (θx, θy, θz). In addition, since the tilt angle sensor is known (for example, refer to Patent Documents 5 to 9), the description thereof is omitted here.

The control circuit 1 includes a central processing unit (CPU), and performs a processing operation in accordance with a program stored in the nonvolatile memory 2. In the nonvolatile memory 2, in addition to the opening degree control program of the valve body opening degree of the control valve 200, a normal/abnormality determination program of the mounting posture of the electric actuator which is a program specific to the present embodiment is stored.

Further, in the nonvolatile memory 2, the threshold value α1 used in the normal/abnormal determination in the processing operation of the control circuit (CPU) 1 performed in the normal/abnormal determination program according to the above-described mounting posture is stored. (α1x, α1y, α1z) and α2 (α2x, α2y, α2z). The threshold values α1 and α2 will be described later in detail.

Further, in the nonvolatile memory 2, the normal mounting posture and the initial mounting posture of the electric actuator 100 with respect to the valve 200 are stored.

In this embodiment, as the normal mounting posture of the electric actuator 100 with respect to the valve 200, the nonvolatile memory 2 stores a posture in which the electric actuator 100 is mounted above the valve 200, that is, in design. The mounting posture (θxnc) in the X-axis direction, the mounting posture (θync) in the Y-axis direction, and the mounting posture (θznc) in the Z-axis direction are set.

In addition, as the initial mounting posture of the electric actuator 100 with respect to the valve 200, the non-volatile memory 2 stores an installation posture in the actual X-axis direction before the electric actuator 100 is mounted on the valve 200 to start the operation ( Θxst), the mounting posture in the Y-axis direction (θyst), and the mounting posture in the Z-axis direction (θzst).

(control of valve opening)

The control circuit (CPU) 1 controls the opening degree of the valve body in the valve 200 in accordance with the opening degree control program stored in the nonvolatile memory 2 as a general process. The opening control of the valve body is performed in the following manner.

The setting value (set opening degree) of the valve opening degree from the external controller 300 is supplied to the control circuit (CPU) 1 in accordance with the path of the setting input circuit 6 → the multiplexer 5 → the A/D converter 3, and according to The path of the tool 5 → A/D converter 3 supplies the measured value (solid opening degree) of the valve opening degree from the feedback circuit 9 to the control circuit (CPU) 1.

The control circuit (CPU) 1 compares the set opening degree from the A/D converter 3 with the actual opening degree, and transmits a drive command to the motor drive circuit 8 so that the set opening degree coincides with the actual opening degree. Thereby, the electric motor 7 is driven, and the driving force of the electric motor 7 is transmitted to the valve shaft of the valve 200 via the speed reduction mechanism 10, and the opening degree of the valve body fixed to the valve shaft is adjusted.

(self-diagnosis)

The control circuit (CPU) 1 performs self-diagnosis (step S102) when the power is turned on (FIG. 2: step S101), and determines whether the processing function of the electric actuator 100 is normal/abnormal (step S103). Here, if the result of the self-diagnosis is "abnormal" (NO in step S103), the system is stopped (step S104), and the result of the self-diagnosis is transmitted to the external controller 300 via the communication line 4 (step S105).

(Normal / abnormal judgment of the mounting posture of the electric actuator)

If the result of the self-diagnosis is normal (YES in step S103), the control circuit (CPU) 1 reads the inclination angles θ (θx, θy, θz) from the tilt angle sensor 11 as the current state of the electric actuator 100. The installation posture (step S106).

Then, the difference (absolute value) between the inclination angle θx and the normal attachment posture (θxnc) in the X-axis direction is obtained as the deviation amount δ1x, and the difference between the inclination angle θy and the normal attachment posture (θync) in the Y-axis direction is obtained (absolutely Value) As the offset amount δ1y, the difference (absolute value) between the inclination angle θz and the normal attachment posture (θznc) in the Z-axis direction is obtained as the offset amount δ1z (step S107).

Then, the offset δ1x is compared with the threshold α1x, the offset δ1y is compared with the threshold α1y, and the offset δ1z is compared with the threshold α1z. If only one of the offsets δ1x, δ1y, δ1z exceeds the threshold α1x, α1y , α1z, the flag F1 is also established, and is set to F1 = 1 (step S108). In other words, the offset amount δ1 of the mounting posture of the electric actuator 100 from the normal mounting posture is compared with the threshold α1 of the normal range defined by the offset amount, and if the offset amount δ1 exceeds the threshold α1 of the normal range, It is judged to be abnormal, and the flag F1 is set to "1".

Then, the control unit (CPU) 1 obtains the difference (absolute value) between the inclination angle θx and the initial attachment posture (θxst) in the X-axis direction as the deviation amount δ2x, and obtains the initial installation posture of the inclination angle θy and the Y-axis direction. The difference (absolute value) of (θyst) is obtained as the offset amount δ2y, and the difference (absolute value) between the inclination angle θz and the initial mounting posture (θzst) in the Z-axis direction is obtained as the offset amount δ2z (step S109).

Further, the offset δ2x is compared with the threshold α2x, the offset δ2y is compared with the threshold α2y, and the offset δ2z is compared with the threshold α2z, and if only one of the offsets δ2x, δ2y, δ2z exceeds the thresholds α2x, α2y And α2z, the flag F2 is also established, and F2=1 is set (step S110). In other words, the offset amount δ2 of the mounting posture of the electric actuator 100 from the initial mounting posture is compared with the threshold α2 of the normal range defined by the offset amount, and if the offset amount δ2 exceeds the threshold α2 of the normal range, It is judged to be abnormal, and the flag F2 is set to "1".

In this way, the control circuit (CPU) 1 obtains the inclination angles θ (θx, θy, θz), the offsets δ1 (δ1x, δ1y, δ1z), the offsets δ2 (δ2x, δ2y, δ2z), and the flag F1. After F2, the information is transmitted to the external controller 300 via the communication circuit 4 (step S111).

Further, the control circuit (CPU) 1 confirms the flags F1 and F2, and if only one of the flags F1 and F2 is "1" (YES in step S112), the system is stopped (step S114). If none of the flags F1 and F2 is "1" (NO in step S112), the inclination angles θ (θx, θy, θz) acquired in step S106 are stored in the nonvolatile memory 2 (step S113). And returns to step S106.

The external controller 300 receives the inclination angles θ (θx, θy, θz) from the electric actuator 100, the offsets δ1 (δ1x, δ1y, δ1z), the offsets δ2 (δ2x, δ2y, δ2z), the flag F1, F2, and display the information on the display. According to the information displayed on the display, the maintenance personnel can know the current installation posture of the electric actuator 100, the offset of the current installation posture from the normal installation posture, the offset of the current installation posture from the initial installation posture, and the current installation posture. Normal/abnormal relative to the normal installation posture, normal/abnormal relative to the initial installation posture with respect to the current installation posture.

For example, in the case where the electric actuator 100 is mounted opposite to the normal mounting posture, the flag F1 is "1". According to the state of the flag F1, the maintenance person can know in advance that the rainwater may infiltrate into the electric actuator 100, and take countermeasures in advance.

In addition, when the bolt of the fixed casing 12 is loosened by vibration, and the mounting posture of the electric actuator 100 changes from the initial state, and exceeds the normal range, the flag F2 is "1". According to the state of the flag F2, the maintenance person can know in advance that there is a possibility that the output shaft of the electric actuator 100 and the valve shaft of the valve 200 are subjected to bending stress to be deformed or damaged, and countermeasures are taken in advance.

As described above, according to the present embodiment, it is possible to avoid the stop due to the sudden failure of the actuator, thereby improving the usability of the system. Further, in the present embodiment, since the history of the inclination angle θ is stored in the nonvolatile memory 2 (FIG. 2: Step S113), it is possible to perform valuable failure analysis by studying the history of the inclination angle θ.

Further, in this embodiment, the tilt angles θ (θx, θy, θz), the shift amounts δ1 (δ1x, δ1y, δ1z), and the shift amount δ2 (δ2x,) are transmitted from the electric actuator 100 to the external controller 300. Δ2y, δ2z), flags F1, F2, however, all such information may not be transmitted.

For example, only the inclination angles θ (θx, θy, θz) can be transmitted. At this time, the maintenance person can know the installation posture of the electric actuator 100 based on the transmitted inclination angles θ (θx, θy, θz), and if the installation posture of the electric actuator 100 is reversed, it can be determined that the rainwater may infiltrate. When the mounting posture of the electric actuator 100 is largely changed, it may be determined that the output shaft and the valve shaft may be deformed or broken.

Alternatively, only the offset δ1 (δ1x, δ1y, δ1z) may be transmitted. At this time, the maintenance personnel can know the offset of the current mounting posture of the electric actuator 100 from the normal mounting posture according to the transmitted offset amount δ1 (δ1x, δ1y, δ1z), and thus can be applied to the electric actuator 100. The installation posture is judged by an abnormal range in which rainwater may infiltrate or in a normal range.

Alternatively, only the offset δ2 (δ2x, δ2y, δ2z) may be transmitted. At this time, the maintenance personnel can know the offset (variation amount) of the current mounting posture of the electric actuator 100 from the initial mounting posture according to the transmitted offset amount δ2 (δ2x, δ2y, δ2z), and thus can be electrically actuated. The mounting posture of the device 100 is determined by an abnormal range in which the output shaft and the valve shaft are likely to be deformed or broken, and is also in a normal range.

3 is a functional block diagram showing a main part of the control circuit 1 and the nonvolatile memory 2 of the electric actuator 100. The control circuit 1 includes a current mounting posture creating unit 1A, a mounting posture shift amount calculating unit 1B, and a mounting posture abnormality determining unit 1C. The nonvolatile memory 2 includes a normal mounting posture storage unit 2A, an initial mounting posture storage unit 2B, and a mounting posture shift amount normal range threshold value storage unit 2C.

In the non-volatile memory 2, the normal mounting posture (θxnc) of the electric actuator 100 in the X-axis direction, the normal mounting posture (θync) in the Y-axis direction, and the Z-axis direction are stored in the normal mounting posture storage unit 2A. Normal installation posture (θznc). The initial mounting posture storage unit 2B stores an initial mounting posture (θxst) in the X-axis direction, an initial mounting posture (θyst) in the Y-axis direction, and an initial mounting posture (θzst) in the Z-axis direction of the electric actuator 100. In the mounting posture shift amount normal range threshold value storage unit 2C, the threshold value α1 of the normal range in which the mounting posture of the electric actuator 100 is shifted from the normal mounting posture and the normal range of the offset from the initial mounting posture are stored. The threshold α2.

In the control circuit 1, the posture preparation portion 1A is currently mounted, and the inclination angles θ (θx, θy, θz) from the inclination angle sensor 11 are taken as the current installation posture of the electric actuator 100. The mounting posture shift amount calculating unit 1B obtains the current mounting posture θ (θx, θy, θz) from the current mounting posture creating unit 1A and the normal mounting posture θnc (θxnc, θync, θznc) in the normal mounting posture storage unit 2A. The difference (absolute value) is obtained as the offset δ1 (δ1x, δ1y, δ1z), and the current mounting posture θ (θx, θy, θz) from the current mounting posture creating unit 1A and the initial state in the initial mounting posture storage unit 2B are obtained. The difference (absolute value) between the mounting postures θst (θxst, θyst, θzst) is taken as the offset δ2 (δ2x, δ2y, δ2z).

The mounting posture abnormality determining unit 1C performs the offset amounts δ1 (δ1x, δ1y, δ1z) obtained by the mounting posture shift amount calculating unit 1B and the threshold value α1 of the normal range in the mounting posture shift amount normal range threshold value storage unit 2C. In comparison, when the shift amount δ1 (δ1x, δ1y, δ1z) exceeds the threshold value α1 of the normal range, it is determined that the mounting posture is abnormal. In addition, the offset amount δ2 (δ2x, δ2y, δ2z) obtained by the mounting posture shift amount calculating unit 1B is compared with the threshold value α2 of the normal range in the mounting posture shift amount normal range threshold value storage unit 2C, and is shifted. When the amount δ2 (δ2x, δ2y, δ2z) exceeds the threshold α2 of the normal range, it is determined that the mounting posture is abnormal.

The current mounting posture (θx, θy, θz) of the electric actuator 100 which is created by the current mounting posture creating unit 1A, and the shift amount δ1 (δ1x, δ1y) calculated by the mounting posture shift amount calculating unit 1B. Δ1z), δ2 (δ2x, δ2y, δ2z) and the determination result of the mounting posture determined by the mounting posture abnormality determining unit 1C are transmitted to the external controller 300 via the communication line 4. The current mounting posture creating unit 1A, the mounting posture shift amount calculating unit 1B, and the mounting posture abnormality determining unit 1C are realized as processing functions of the CPU of the control circuit 1.

Further, in the functional block diagram shown in FIG. 3, in the current mounting posture creating portion 1A, the X-axis direction, the Y-axis direction, and the Z-axis direction are synthesized based on the inclination angles θx, θy, and θz from the tilt angle sensor 11. The inclination angle of the composite is used as the current installation posture of the electric actuator 100, and the offset amount of the installation posture is obtained as the difference between the normal installation posture and the initial installation posture stored corresponding thereto, thereby The normal/abnormal determination of the mounting posture can be performed based on the deviation and the threshold of the normal range.

1. . . Control circuit

2. . . Non-volatile memory

3. . . A/D converter

4. . . Communication line

5. . . Multiplexer

6. . . Setting input circuit

7. . . electric motor

8. . . Motor drive circuit

9. . . Feedback circuit

10. . . Speed reduction mechanism

11. . . Tilt angle sensor

12. . . cabinet

100. . . Electric actuator

200. . . valve

300. . . External controller

1A. . . Current installation posture

1B. . . Mounting posture offset calculation unit

1C. . . Mounting posture abnormality determining unit

2A. . . Normal installation posture storage unit

2B. . . Initial installation posture storage unit

2C. . . Mounting posture offset normal range threshold storage unit

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the main part of an embodiment of an electric actuator according to the present invention.

Fig. 2 is a flow chart for explaining the processing operation of the normal/abnormality determination program in accordance with the mounting posture of the electric actuator.

Fig. 3 is a functional block diagram of a main part of a control circuit and a nonvolatile memory in the electric actuator.

1. . . Control circuit (CPU)

2. . . Non-volatile memory

3. . . A/D converter

4. . . Communication line

5. . . Multiplexer

6. . . Setting input circuit

7. . . electric motor

8. . . Motor drive circuit

9. . . Feedback circuit

10. . . Speed reduction mechanism

11. . . Tilt angle sensor

100. . . Electric actuator

200. . . valve

300. . . External controller

Claims (8)

An electric actuator, wherein an electric motor for driving a valve is disposed in a casing, and is characterized in that: a tilt angle sensor is disposed in the casing for measuring a tilt angle of the electric actuator And a means for transmitting the information about the mounting posture of the electric actuator obtained based on the tilt angle measured by the tilt angle sensor to the external device. The electric actuator according to claim 1, wherein the signal transmitting means transmits the tilt angle measured by the tilt angle sensor to the external device as the mounting posture related information of the electric actuator. An electric actuator according to claim 1, comprising: a normal mounting posture storing means for storing information relating to a normal mounting posture of the electric actuator as a normal mounting posture; and currently installing a posture forming means according to the tilting The inclination angle measured by the angle sensor, the current installation posture related information of the electric actuator is made into the current installation posture; and the installation posture determination means compares the normal installation posture with the current installation posture to determine the The current mounting posture of the electric actuator is normal/abnormal; and the transmitting means transmits the result of the mounting posture determining means to the external device as the mounting posture related information of the electric actuator. An electric actuator according to claim 1, comprising: an initial mounting posture storage means for storing an initial mounting posture related information of the electric actuator as an initial mounting posture; and a current mounting posture forming means according to the tilt angle a tilt angle measured by the sensor, the current mounting posture related information of the electric actuator is used as a current mounting posture; and an installation posture determining means, the initial mounting posture is compared with the current mounting posture to determine the electric The normal/abnormal state of the current mounting posture of the actuator; the transmitting means transmits the result of the determination of the mounting posture determining means to the external device as the mounting posture related information of the electric actuator. An electric actuator according to claim 1, comprising: a normal mounting posture storing means for storing the normal mounting posture related information of the electric actuator as a normal mounting posture; and the current mounting posture creating means, according to the tilt angle The tilt angle measured by the sensor, the current installation posture related information of the electric actuator is made into the current installation posture; and the installation posture offset calculation means is calculated according to the difference between the normal installation posture and the current installation posture. The amount of shift of the mounting posture of the electric actuator; the transmitting means transmits the offset amount calculated by the mounting posture shift amount calculating means to the external device as the mounting posture related information of the electric actuator. An electric actuator according to claim 1, further comprising: an initial mounting posture storage means for storing an initial mounting posture related information of the electric actuator as an initial mounting posture; and a current mounting posture creating means according to the tilting The tilt angle measured by the angle sensor, the current installation posture related information of the electric actuator is used as the current installation posture; and the installation posture offset calculation means is based on the difference between the initial installation posture and the current installation posture. Calculating an offset amount of the mounting posture of the electric actuator, and the transmitting means transmits the offset amount calculated by the mounting posture shift amount calculating means to the external device as the mounting posture related information of the electric actuator . An electric actuator according to claim 1, comprising: a normal mounting posture storing means for storing the normal mounting posture related information of the electric actuator as a normal mounting posture; and the current mounting posture creating means, according to the tilt angle a tilt angle measured by the sensor, the current installation posture related information of the electric actuator is made into a current installation posture; and the installation posture offset calculation means calculates the difference according to the difference between the normal installation posture and the current installation posture The offset amount of the mounting posture of the electric actuator; the normal range threshold storing means storing the threshold value of the normal range of the mounting posture shift amount of the electric actuator as the normal range threshold; and the mounting posture determining means to install the The offset amount of the mounting posture calculated by the posture shift amount calculating means is compared with the normal range threshold value to determine the normal/abnormality of the current mounting posture of the electric actuator; the sending means, the mounting posture determining means The result of the determination is transmitted to the external device as the installation posture related information of the electric actuator. An electric actuator according to claim 1, comprising: an initial mounting posture storage means for storing an initial mounting posture related information of the electric actuator as an initial mounting posture; and a current mounting posture forming means according to the tilt angle The tilt angle measured by the sensor is used to determine the current installation posture of the electric actuator as the current installation posture; the installation posture offset calculation means calculates the difference between the initial installation posture and the current installation posture. The amount of shift of the mounting posture of the electric actuator; the normal range threshold storing means storing the threshold value of the normal range of the mounting posture shift amount of the electric actuator as a normal range threshold; and mounting posture determining means, The offset of the mounting posture calculated by the mounting posture offset calculating means is compared with the normal range threshold to determine the normal/abnormality of the current mounting posture of the electric actuator; the sending means, the mounting posture determining means The result of the determination is transmitted to the external device as the installation posture related information of the electric actuator.