JPH062248U - Waveform observation device - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a waveform observation device that can perform advanced observation functions regardless of location. [Configuration] In a waveform observation device that attenuates analog input signals, performs analog / digital conversion, stores and controls the digital data in the waveform memory, processes the data, and displays the waveform, inputs the operation signal from the slave unit. A CPU system for controlling setting changes of the master unit by operating the slave unit, a master unit provided with a master unit and a power supply circuit for supplying power to the slave unit, a signal input section and setting means dedicated to the slave unit, and a main body A circuit that receives the setting signal from the master unit and transmits the signal of the slave unit, an indicator that displays based on the signal from the display processing circuit in the master unit, and the slave unit that is based on the power supply from the master unit. A slave unit provided with a power source stabilization circuit for supplying power to the unit and a master unit and a slave unit can transmit and receive control signals and the like via a cable, and can be used for observation in both the master unit and the slave unit. Characterized by being operable That the waveform observing apparatus

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waveform observing device such as a digital oscilloscope, and more particularly to a waveform observing device having an observation target input section separated from a main body.

[0002]

[Prior art]

 When measuring an electric signal using a waveform observation device such as a digital oscilloscope, when the place where the device body that is the instrument for the observation can be installed does not match the part where the measurement target is installed There is. In other words, in some cases, it may be necessary to make measurements on the ground or at a place far away from a stable place where the main unit can be installed. Also, even if it can be installed, it is often difficult to operate the main body and observe the waveform while applying the probe because the place to connect the probe is small. Conventionally, portable oscilloscopes have been used in such cases, but generally due to downsizing, the level of bandwidth, sampling speed, record length, math function, etc. is low, and in such places as described above. Can not be advanced measurement.

[0003]

[Problems to be solved by the device]

 Therefore, there is a problem that the measurement may not be advanced depending on the location of the measurement target. An object of the present invention is to solve this problem and to realize a waveform observing device capable of performing the same observation as the function of the main body even in a place where the main body cannot be installed.

[0004]

[Means for Solving the Problems]

 The present invention is a waveform observation apparatus that attenuates an analog input signal, performs analog / digital conversion, stores and controls the digital data in the waveform memory, processes the data, and displays the waveform. A display processing circuit for outputting a display signal to the machine, a display for displaying a display signal from the display processing circuit 5 including a signal processed from the slave, and a slave for inputting an operation signal from the slave. CPU system for controlling the setting change of the master unit by the operation of the master unit, the master unit provided with the power supply circuit for supplying power to the master unit and the slave unit, and the input connection switching circuit for switching the input connection to DC, AD, GND An attenuator circuit for switching the signal from the input connection switching circuit to 1/1, 1/10, 1/100, etc., and a buffer circuit for converting a high impedance signal from the attenuator circuit to a low impedance signal. Pump, a man-machine interface switch in the slave unit, an operation input / output unit including LEDs, a circuit for converting the signal from the operation input / output unit to a digital serial signal transmitted to the master unit, and the master unit Operation signal transmission / reception consisting of a circuit for receiving a lighting signal of an LED or the like sent from the device and sending it to the operation input / output section, and a circuit for receiving a setting signal from the main body and giving a switching signal to the input connection switching circuit and the attenuation circuit It has a circuit, a display device that displays based on signals from the display processing circuit in the main unit, and a power supply stabilization circuit that supplies the power required by the child device based on the power supply from the parent device. It is possible to send and receive control signals and the like between the slave unit and the master unit and the slave unit via a cable, and both the master unit and the slave unit can be operated for observation. It is a waveform observation device.

[0005]

[Action]

 By installing a slave unit that has an input unit, a display unit (output unit), and an operation unit that are separated from the main unit and connected by a cable to the waveform observation device, advanced observation is possible regardless of the location.

[0006]

【Example】

 FIG. 1 shows the basic configuration of the present invention. In the figure, reference numeral 1 denotes an input signal processing unit which processes input of an analog input signal. A variable gain amplifier 2 attenuates the signal from the input signal processing unit 1. 3 is a digitizing circuit, which is a circuit composed of a circuit for analog / digital converting the signal from the variable gain amplifier 2 and a waveform memory for storing the digitized signal. A data processing circuit 4 controls the storage of digital data in the waveform memory and controls other operations. Reference numeral 5 denotes a display processing circuit, which is a circuit for performing data processing for converting the input data from the data processing circuit 4 into data for waveform display. A display 6 displays the signal from the display processing circuit 5. Reference numeral 7 is a CPU system, which has a system for inputting operation signals from the slave unit and controlling the setting change of the master unit by operating the slave unit. Reference numeral 7'denotes a man-machine operation display section for displaying a man-machine operation panel or the like on the master unit. Reference numeral 8 denotes a power supply circuit that supplies power to the master unit and the slave unit. The above is the configuration of the parent device. On the other hand, the slave unit has the following configuration. An input connection switching circuit 9 switches the input connection to DC, AD, and GND. An attenuator circuit 10 switches the signal from the input connection switching circuit 9 to 1/1, 1/10, 1/100 or the like. A buffer amplifier 11 converts a high impedance signal from the attenuation circuit 10 into a low impedance signal. Reference numeral 12 denotes a display, which displays based on the output signal from the display processing circuit 5 in the master unit. An operation input unit 13 is composed of a switch, an LED, etc., which is a man-machine interface in the slave unit. Reference numeral 14 denotes an operation signal transmission / reception circuit which outputs a signal having the content operated by the operation input / output unit 13 to the input connection switching circuit 9 and the attenuator 10 in the slave unit, and the input connection switching circuit 9 and the attenuator 10 respectively. It is composed of a circuit for converting the output of the above into a digital serial signal or the like transmitted to the master unit, a circuit for receiving the lighting signal of the LED or the like sent from the master unit, and sending it to the operation input unit 13. Reference numeral 15 is a power supply stabilizing circuit, which includes a filter and a power supply stabilizing circuit. More specifically, ± 12V is supplied from the power supply circuit 8 of the parent device, and operations of outputting ± 12V and ± 5V to the child device are performed.

The operation in such a configuration will be described. In this case, description of ordinary input terminals and input circuits will be omitted, and connection between the master unit and the slave unit will be described. Each terminal in FIGS. 1 and 2 will be described. In FIG. 1, P1 is an observed signal input terminal, P2 is a terminal for displaying a slave unit, P3 is an operation signal input terminal, and P4 is a power source output terminal for the slave unit. In FIG. 2, C1 is an observed signal input / output terminal, C2 is an observed signal output terminal, C3 is a display signal input terminal, C4 is an operation signal input / output terminal, and C5 power source input terminal. These connection relationships are C3-P2, C4-P3, C5-P4 when C2 and P1 are connected (hereinafter referred to as C2-P1). In this case, it is assumed that the observed signal input terminal P1 of the parent device is in a state where the input impedance is 50Ω or a terminator of 50Ω is added.

A case in which observation is performed by an operation from a slave unit with such a connection will be described. At this time, the master unit sets the panel setting to the slave unit priority state. Specifically, this means that the CPU system 7 enables the signal from the operation signal input terminal P3. At this time, the input signal processing unit 1 of the master unit is set to a constant input mode, for example, DC input and 1/1 damping ratio. When the observed signal is input to the observed signal input / output terminal C1 in the slave, a waveform display corresponding to the setting is displayed on the display 12 of the slave. For the observations on this slave, the settings are made by operating the switches on the slave. The settings that can be changed are the time axis, data processing mode, and display mode. Although FIG. 1 shows the configuration of only one channel, it can actually be used as a configuration of a plurality of channels.

In the digital oscilloscope and the like, the circuits after the AD conversion unit occupy a large volume, power consumption, and cost. Therefore, it is difficult to reduce the size while maintaining high functionality. In the present invention, only the slave unit is displayed on the LCD, etc., and complicated data processing is performed by the master unit, and the priority of the setting between the master unit and the slave unit can be set. The handset was downsized with it. Therefore, it becomes possible to easily bring the slave unit to a place away from the master unit, especially in a narrow place or an unstable place, and after the AD converter, the advanced functions of the master unit (eg sampling rate, trigger, Data processing, large-capacity waveform memory, display processing function, hard copy function, etc.) can be utilized, resulting in a marked improvement in the observation function compared to observation using a conventional portable measuring instrument. In concrete terms, even if the cable length is about 2 meters, it is conceivable that it will be convenient for work where the cable is sufficiently narrow. In addition, since the slave unit can be easily installed near the probe tip even in normal cases, it is possible to observe without keeping an eye on the observation target, and work can be performed efficiently.

As an application of the embodiment of the present invention, the master unit is provided with a dedicated signal input terminal and circuit from the slave unit, the slave unit is provided with a self-contained power supply such as a battery, The transmission and reception of the display signal and the operation signal between the slave units may be performed by a wireless system.

[0011]

[Effect of device]

 As described in detail above, according to the present invention, it is possible to realize a waveform observation apparatus capable of performing advanced observation regardless of location.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a basic configuration diagram of the present invention.

FIG. 3 is a specific external view of an embodiment of the present invention.

[Explanation of symbols]

 1 Input signal processing unit (attenuator) 2 Variable gain amplifier 3 Digitizing circuit 4 Data processing circuit 5 Display processing circuit 6 Display 7 CPU system 7'Man-machine operation display unit 8 Power supply circuit 9 Input connection switching circuit 10 Attenuator 11 Buffer Amplifier 12 Display 13 Operation input / output section 14 Operation signal transmission / reception circuit 15 Power supply stabilization circuit

Claims (1)

[Scope of utility model registration request] 1. Attenuating an analog input signal,
In a waveform observation device that performs digital conversion, stores and controls the digital data in a waveform memory, and performs data processing to display a waveform, a display processing circuit that outputs a display signal and a display signal to a slave unit, which will be described later, and a slave unit. A display unit for displaying a display signal from the display processing circuit 5 including a signal processed by the slave unit, a CPU system for inputting an operation signal from the slave unit and controlling the setting change of the master unit by operating the slave unit, The master unit provided with a power supply circuit for supplying power to the slave unit and the slave unit, an input connection switching circuit for switching the input connection to DC input, AC input, and ground input, and a signal from the input connection switching circuit
Operation consisting of an attenuation circuit for switching to 1, 1/10, 1/100, etc., a buffer amplifier for converting a high-impedance signal from the attenuation circuit to a low impedance, a switch that is a man-machine interface in a slave unit, an LED, etc. An input / output unit, a circuit for converting a signal from the operation input / output unit into a digital serial signal transmitted to the master unit, and a lighting signal of an LED or the like sent from the master unit to receive the operation input / output unit. An operation signal transmitting / receiving circuit including a circuit for sending out and a setting signal from the main body for giving a switching signal to the input connection switching circuit and the attenuation circuit, and a display device for displaying based on a signal from a display processing circuit in the main body And a slave unit provided with a power supply stabilization circuit for supplying the power required by the slave unit based on the power supply from the master unit, Machine and the slave machine via a cable, can transmit and receive control signals, a waveform observing apparatus, characterized manipulate the able for observation in both the master unit and the slave unit.