JP2002300049A - Wireless unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless unit that can change a reference value (a reference value to discriminate whether abnormity exists depending on a high surface temperature of an isolator) to discriminate whether the wireless unit is faulty depending on the rise or fall of the ambient temperature of a place where the wireless unit is installed. SOLUTION: The wireless unit is provided with a temperature sensor to detect an ambient temperature in the wireless unit that is used for the reference value to be compared with the surface temperature of the isolator. The reference value is changed depending on the rise or fall of the temperature in a place where the wireless unit is installed, and a control section discriminates the fault when the surface temperature of the isolator exceeds the reference value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio device using a radio transmission system.

[0002]

2. Description of the Related Art Failure detection in a wireless device, which is one example of the related art, will be described with reference to FIG. The housing 1 that houses the wireless device includes a control unit 2, a transmission / reception unit 3, a power amplifier 4, an isolator 5, and a coaxial relay 6. The control unit 2 gives transmission information and modulation to the transmission / reception unit 3 and also monitors and outputs received voice. The power amplifier 4 amplifies the transmission output of the transmission / reception unit 3. The isolator 5 is mounted on the transmission side, passes only radio waves from one direction without loss, and removes reflected waves from the load side. The coaxial relay 6 is switched by the transmission information from the control unit 2. 7, a coaxial cable; and 8, an antenna. The temperature sensor 9 monitors the surface temperature of the isolator 5 and outputs an analog voltage for each temperature value.

The surface temperature of the isolator 5 is measured by a temperature sensor 9
When the analog voltage value output based on the temperature detected by the temperature sensor 9 exceeds the reference voltage value, it is determined to be abnormal and fault information is output.

A failure detection circuit inside the control unit 2 will be described with reference to FIG. Reference numeral 11 denotes an input terminal for inputting an analog voltage value of a temperature sensor for detecting a surface temperature of the isolator 5, and outputs an arbitrary voltage value according to the detected temperature value. This voltage value is compared with a reference voltage value input to the reference voltage input terminal 12. If the voltage value is larger than the reference voltage value, information on abnormal temperature is output to the output terminal 13.

[0005]

SUMMARY OF THE INVENTION In a conventional wireless device,
By comparing the reference value for determining whether or not a failure has occurred with the surface temperature of the isolator, the reference value cannot be changed even if the temperature of the place where the wireless device is installed fluctuates. Therefore, there is a disadvantage that it is difficult to set a reference value according to a change in temperature.

Therefore, according to the present invention, the reference value is changed in accordance with the temperature of the place where the wireless device is installed, and if the surface temperature of the isolator is higher than this reference value, it can be determined that a failure has occurred. The purpose is to.

[0007]

According to the present invention, in order to achieve the above object, a reference value to be compared with a surface temperature of an isolator is set to an ambient temperature in a radio device, and a temperature sensor for detecting the ambient temperature is provided. It was made. As a result, the reference value is changed according to the rise and fall of the temperature of the place where the wireless device is installed, and when the surface temperature of the isolator is higher than this reference value, it is possible to determine that a failure has occurred. . Further, the wireless device can be used without being restricted to a place where the wireless device is installed (for example, a tropical region or a cold region).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A radio apparatus according to an embodiment of the present invention will be described with reference to FIG. The housing 1 that houses the wireless device includes a control unit 2, a transmission / reception unit 3, a power amplifier 4, an isolator 5, and a coaxial relay 6. The control unit 2 gives transmission information and modulation to the transmission / reception unit 3 and also monitors and outputs received voice. The power amplifier 4 amplifies the transmission output of the transmission / reception unit 3. The isolator 5 is mounted on the transmitting side, passes only radio waves from one direction without loss, and removes reflected waves from the load side. The coaxial relay 6 is switched by the transmission information from the control unit 2. 7, a coaxial cable; and 8, an antenna. The temperature sensor 9 monitors the surface temperature of the isolator 5 and outputs an analog voltage for each temperature value. One temperature sensor 10 is a temperature sensor in the wireless device, and monitors the temperature inside the wireless device based on a change in the temperature of the outside air of the wireless device, and the analog output voltage value changes according to the ambient temperature.

Normally, when the outside air temperature is low, the air temperature inside the wireless device decreases, and the surface temperature of each device also decreases. The surface temperature of the isolator 5 is monitored by a temperature sensor 9. If the analog voltage value output according to the temperature detected by the temperature sensor 9 exceeds a reference voltage value corresponding to the temperature (ambient temperature) detected by the temperature sensor 10, it is determined that an abnormality has occurred and fault information is output. .

A failure detection circuit inside the control unit 2 will be described with reference to FIG. Reference numeral 11 denotes an input terminal to which an analog voltage of the temperature sensor 6 for detecting the surface temperature of the isolator 5 is inputted, and an arbitrary voltage value is inputted according to the detected temperature value. On the other hand, 14 is a temperature sensor 1 for detecting the temperature inside the apparatus.
This is an input terminal to which an analog voltage of 0 is input, and inputs a reference voltage value according to the temperature inside the device. The voltage value input from the analog voltage input terminal 11 is compared with a reference voltage value. If the voltage value input from the analog voltage input terminal 11 is larger than the reference voltage value, an abnormal temperature is output to the output terminal 13. Information is output.

[0011]

The conventional wireless device does not detect the ambient temperature, so the temperature change at the place where the wireless device is installed is ignored, and only the temperature rise of the device alone is monitored. Since the wireless device of the present invention also monitors the temperature inside the wireless device, it is possible to determine whether a failure has occurred regardless of a change in the temperature of the place where the wireless device is installed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a wireless device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a failure detection circuit inside a control unit in the wireless device according to one embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a wireless device which is an example of the related art.

FIG. 4 is a block diagram showing a configuration of a failure detection circuit inside a control unit in a wireless device as an example of the related art.

[Explanation of symbols]

1: Wireless device housing 2: Control unit 3: Transmitter / receiver unit 4: Power amplifier unit 5: Isolator 6: Coaxial relay 7: Coaxial cable 8: Antenna 9: Temperature sensor 10: Temperature sensor 11: Detect the surface temperature of the isolator Input terminal to which analog voltage of temperature sensor is input 12: Input terminal to which reference voltage value is input 13: Output terminal 14: Input terminal to which analog voltage of temperature sensor for detecting temperature in the device is input

Claims (1)

[Claims] 1. An antenna, an isolator for preventing reflection of a transmission signal, a first temperature sensor for detecting a surface temperature of the isolator, and connected to the first temperature sensor and connected to a subsequent stage of the isolator. A wireless device including a control unit, comprising: a second temperature sensor that detects an internal temperature of the device, wherein when a difference between a surface temperature of the isolator and the internal temperature of the device becomes equal to or greater than a predetermined value, the abnormality is determined to be abnormal. A wireless device configured to be determined by a control unit.