JPH0432859Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention links an operating rod to the movement of system mechanism members to be monitored or the flow of a workpiece, and transmits a data signal corresponding to the movement of the operating rod using electromagnetic waves. The present invention relates to an operation monitoring wireless transmitter for monitoring the movement of mechanical members or the flow of workpieces using a central control device provided on the receiving side.

(Prior art) In industrial process control systems, building equipment control systems, etc., the movements of system mechanical components such as valves and the flow of workpieces are constantly monitored.
A centrally located control device provides optimal control. In conventional systems, a large number of distributed monitoring devices are connected by wire to a central control device, and data signals detected by each monitoring device are appropriately transmitted to the central control device.

(Problem that the invention aims to solve) However, in the case of the above-mentioned conventional system that connects monitoring equipment and central control equipment using wires, the larger the scale of the equipment, the longer the distance to run the wires becomes uneconomical. There is a problem with that. Also,
When moving or installing a new monitoring device due to changes in the system, wiring work to connect it to a central control device is required, which makes the work complicated.

Therefore, if data signals are wirelessly transmitted from the monitoring device to the central control device, there is no need for the wiring work described above, making it possible to configure the system economically and without making changes easily. obtain.

The purpose of the present invention was devised in view of the above-mentioned conventional circumstances, and the purpose of the present invention is to wirelessly transmit data signals corresponding to the movements of mechanical members, etc. to be monitored, and to and,
It is an object of the present invention to provide an operation monitoring radio transmitting device in which transmitting circuit parts can be easily replaced separately.

(Means for Solving the Problems) In order to achieve the above object, the operation monitoring wireless transmitting device of the present invention includes a mechanism section including an operating rod, and a mechanism section that wirelessly transmits a data signal according to the operation of the operating rod. an electric circuit section, the electric circuit section is separated into a data output circuit section that outputs a data signal in response to the operation of the operating rod, and a transmission circuit section that radiates electromagnetic waves in response to the data signal; This transmitting circuit part includes an antenna, a carrier wave oscillation circuit, a transmitting signal generating circuit that outputs a transmitting pulse train according to the device-specific channel code and the data signal, and a modulation circuit that modulates the carrier wave according to the transmitting pulse train. a circuit, the mechanism section and the data output circuit section are housed in a first housing, the transmitting circuit section is housed in a second housing that is grounded, and the first and second housings are housed. The circuits housed in each can be connected and separated via connectors.

(Function) Since the circuits housed in the first and second casings are configured to be connectable and separable via connectors, only one side can be easily replaced or repaired.
Then, the mechanism part failed due to mechanical life and the first
Even if the casing of the device is replaced, the channel code unique to the device will not be changed, and there is no need to make any changes to the receiving system.

In addition, since the second housing that houses the transmitter circuit is grounded, unnecessary radiation is suppressed, and even if multiple operation monitoring wireless transmitters of the present invention are installed close together, they may adversely affect each other and cause malfunctions. There's nothing to do.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is an exploded perspective view of an external appearance of an embodiment of the operation monitoring wireless transmitter of the present invention, FIG. 2 is a diagram illustrating an outline of a system in which the device of FIG. 1 is used, and FIG. 1 is a block circuit diagram of an electrical circuit incorporated into the apparatus of FIG. 1; FIG.

1 to 3, the operation monitoring wireless transmitter of the present invention includes a first housing 1, a mechanism section 3 including an operating rod 2, and a data signal that outputs a data signal in accordance with the operation of the operating rod 2. An output circuit portion 4 is housed. Further, a transmitting circuit portion 6 that emits electromagnetic waves in accordance with a data signal is housed in a second housing 5 that is separate from the first housing 1 . The first and second casings 1 and 5 are connected and separated by a connector 7, and the data output circuit section 4 and the transmission circuit section 6 are electrically connected through the electrodes of the connector 7 to form an electric circuit section. are formed or separated. Further, the second housing 5 is provided with a dome 9 that transmits electromagnetic waves radiated from the antenna 8 included in the transmitting circuit portion 6.

In this configuration, a large number of first casings 1 are distributed and fixed as appropriate so that the operating rods 2 are linked to the movement of the system mechanism members to be monitored or the flow of the workpiece.

Then, a second
The housing 5 is connected by the connector 7. Then,
From each operation monitoring wireless transmitter, the operating rod 2
A data signal corresponding to the operation of the system is transmitted wirelessly, and these electromagnetic waves are received by a receiving device 10 including an antenna 9, and the data signal is further given to a central control device 11 to control the movement of system mechanical members or the flow of workpieces, etc. will be monitored.

Here, the mechanism section 3, data output circuit section 4, and transmission circuit section 6 will be briefly explained. first,
The mechanism section 3 is configured such that the magnet 12 approaches or separates from the reed switch 13 in conjunction with the operation of the operating rod 2, and the reed switch 13 is turned ON/OFF in conjunction with the operation rod 2.

Next, the data output circuit section 4 includes a battery 14 that supplies power to the electric circuit section, a switch circuit 15 that outputs a data signal according to the ON/OFF state of the reed switch 13, and the battery 14.
The battery monitoring circuit 16 monitors the terminal voltage of the battery and outputs a battery signal whose signal is inverted when the voltage falls below a predetermined voltage. Note that the battery 14 is connected to the lid 1 provided on the first housing 1.
It can be easily replaced by removing 7.

The positive power supply line and the ground line of the battery 14 and the output signal lines of the switch circuit 15 and the battery monitoring circuit 16 are connected to the transmitting circuit section 6 via the connector 7.

Further, the transmitting circuit portion 6 includes a switch circuit 15
The data signal is applied to the timing pulse generation circuit 18 and the transmission signal generation circuit 19, and the battery signal of the battery monitoring circuit 16 is applied to the transmission signal generation circuit 19. The transmission signal generation circuit 19 to which the data signal and battery signal are applied generates a unique channel code for identifying each operation monitoring wireless transmitter, a data code corresponding to the data signal, and a battery voltage corresponding to the battery signal. A transmission pulse train is created in which the codes are serially arranged. Furthermore, this transmission pulse train is transmitted to the modulation circuit 20 using a timing pulse outputted from the timing pulse generation circuit 18 every time the data signal is inverted. Note that the transmitted transmission pulse string includes a data code obtained by inverting the data signal. The modulation circuit 20 controls the operation of the carrier wave oscillation circuit 21 according to the transmission pulse train.
The carrier wave modulated in this manner is radiated from the antenna 8 as an electromagnetic wave.

Therefore, if the mechanism section 3 breaks down due to wear of the operating rod 2 or the like, only the first housing 1 can be easily replaced. Furthermore, even if the first casing is replaced, the channel code unique to the device is not changed, so there is no need to make any changes to the receiving side system, and maintenance management is simple. Further, when changing or repairing the circuit included in the transmitting circuit portion 6, such as changing the unique channel code set by the transmitting signal generating circuit 19, the connector 7 easily connects the second housing to the first one. Since it can be connected and separated from the housing 1, the work can be done easily.

Further, the carrier wave in the operation monitoring wireless transmitter of the present invention is in a microwave band of, for example, 10 GHz, and radiation noise is likely to be a problem. Therefore, the antenna 8, the modulation circuit 20, and the carrier wave oscillation circuit 21
By housing the transmission signal generation circuit 19, which includes high frequency circuits such as the above, and a clock pulse generation circuit that sends out a transmission pulse train, in the second housing 5, the second housing 5 can be easily grounded as appropriate. Unnecessary radiation can be suppressed.

FIG. 4 is an exploded perspective view of another embodiment of the operation monitoring wireless transmitter of the present invention. In FIG. 4, the same or equivalent members as in FIG. 1 are given the same reference numerals, and redundant explanations will be omitted.

The differences in Figure 4 from Figure 1 are as follows:
A connector 7 is provided at the other end of the flexible cable 22, one end of which is connected to the first housing 1, so that the second housing 5 can be connected and separated, and a bracket 23 is used to appropriately arrange and fix the second housing 5. This is because it was established. When the first and second casings 1 and 5 are connected via the flexible cable 22, the second casing 5 can be connected independently regardless of the position and orientation of the first casing 1. can be placed in any position and orientation. Then, the second housing 5 can be placed so that the antenna 8 is directed toward the antenna 9 of the receiving device 10, and wireless transmission can be performed efficiently with less transmission power.

Note that the structure of the mechanism section 3 and the circuit configuration of the electric circuit section are not limited to the above embodiments, and can be modified in various ways.

(Effects of the invention) As explained above, according to the operation monitoring wireless transmitter of the invention, if the mechanical part breaks down due to wear of the operating rod, only the first casing can be easily replaced. . Furthermore, even if the first casing is replaced, the channel code unique to the device is not changed, so there is no need to make any changes to the receiving side system, and maintenance management is simple. In addition, the second casing in which the transmitting circuit part is housed is connected to the first casing by means of a connector.
Because it can be connected and separated from the housing, it is easy to change or repair the transmitting circuit. Furthermore, since the circuit that handles high frequencies is housed in the second casing that is grounded, unnecessary radiation is suppressed, and even if multiple operation monitoring wireless transmitters of this invention are installed close together, they may not have any negative effects on each other. This has the excellent effect of preventing malfunctions due to

[Brief description of the drawings]

FIG. 1 is an external perspective view of an embodiment of the operation monitoring wireless transmitter of the present invention, FIG. 2 is a diagram explaining an outline of a system in which the device of FIG. 1 is used, and FIG. , is a block circuit diagram of an electric circuit incorporated in the device of FIG. 1, and FIG. 4 is an external perspective view of another embodiment of the operation monitoring wireless transmitter of the present invention. DESCRIPTION OF SYMBOLS 1... First housing, 2... Operating rod, 3... Mechanism section, 4... Data output circuit portion, 5... Second housing, 6... Transmission circuit portion, 7... Connector, 8...
...Antenna, 19...Transmission signal generation circuit, 20...
...Modulation circuit, 21...Carrier wave oscillation circuit.

Claims (1)

[Scope of utility model registration request] It consists of a mechanism section including an operating rod, and an electric circuit section that wirelessly transmits a data signal according to the operation of the operating rod, and a data output section that outputs a data signal according to the operation of the operating rod. It is separated into a circuit part and a transmitting circuit part that emits electromagnetic waves according to the data signal, and this transmitting circuit part includes an antenna, a carrier wave oscillation circuit, a channel code unique to the device, and a transmitting circuit part that emits electromagnetic waves according to the data signal. A transmission signal generation circuit that outputs a transmission pulse train and a modulation circuit that modulates a carrier wave according to the transmission pulse train are included, the mechanical section and the data output circuit section are housed in a first housing, and the transmission circuit part is housed in a second casing that is grounded, and
An operation monitoring radio transmitting device characterized in that the circuits housed in the first and second housings can be connected and separated via connectors.