CN210347761U - Portable signal monitor - Google Patents
Portable signal monitor Download PDFInfo
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- CN210347761U CN210347761U CN201921048611.8U CN201921048611U CN210347761U CN 210347761 U CN210347761 U CN 210347761U CN 201921048611 U CN201921048611 U CN 201921048611U CN 210347761 U CN210347761 U CN 210347761U
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Abstract
The utility model discloses a portable signal monitor, which comprises a power supply module, a digital signal processing circuit, a direct current signal monitoring circuit connected with the input end of the digital signal processing circuit, an alternating current signal monitoring circuit, a wireless communication module connected with the output end of the digital signal processing circuit, and a man-machine interaction module; the direct current signal monitoring circuit comprises a direct current signal sampling circuit, a first filter circuit and a first ADC (analog-to-digital converter) conversion circuit which are sequentially connected; the alternating current signal monitoring circuit comprises an alternating current signal sampling circuit, a second ADC conversion circuit and a second filter circuit which are connected in sequence. The utility model provides an instrument of electric current signal in can make things convenient for on-line monitoring recording line, but online continuous operation to the electric current signal in the circuit is acquireed to non-invasive mode, and gets off information record such as time, the amplitude of electric current signal, makes things convenient for inquiry, analysis, and can in time send information for the maintainer.
Description
Technical Field
The utility model relates to a signal monitor especially relates to a portable signal monitor.
Background
At present, partial fault phenomena are found to have transient property in the electric power overhaul and daily maintenance work, and real-time monitoring is needed for troubleshooting, such as troubleshooting of suspected tripping faults of the circuit breaker (tripping of the circuit breaker under the conditions of no operation, no relay protection and no action of a safety automatic device); the change of the PT secondary loop low current signal needs to be regularly checked and maintained, so that the potential operation hazard of two-point grounding caused by misoperation is prevented; therefore, in the electric power maintenance and repair working process, an instrument is needed to conveniently monitor and record the current signal in the line on line and can timely send the signal condition to the maintainers.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a portable signal monitor is provided, can make things convenient for the electric current signal in the on-line monitoring recording line to can in time send the signal condition for the maintainer.
In order to solve the technical problem, the utility model discloses a technical scheme be: the portable signal monitor comprises a power supply module, a digital signal processing circuit, a direct current signal monitoring circuit, an alternating current signal monitoring circuit, a wireless communication module and a man-machine interaction module, wherein the direct current signal monitoring circuit is connected with the input end of the digital signal processing circuit;
the direct current signal monitoring circuit comprises a direct current signal sampling circuit, a first filter circuit and a first ADC (analog-to-digital converter) conversion circuit which are sequentially connected;
the alternating current signal monitoring circuit comprises an alternating current signal sampling circuit, a second ADC conversion circuit and a second filter circuit which are connected in sequence.
In a preferred embodiment of the present invention, the dc current signal sampling circuit includes an open hall current sensor, a sampling resistor R1, and the sampling resistor R1 is connected in parallel to the output end of the open hall current sensor.
In a preferred embodiment of the present invention, the ac current signal sampling circuit includes an open type current transformer, a diode D10, D11, a sampling resistor R20, R21, a filter resistor R30, R31, a capacitor C10, a diode C11, and a differential amplifier, wherein a positive input end and a negative input end of the differential amplifier are respectively connected to an output end of the open type current transformer through a filter resistor R30 and a filter resistor R31, the diode D10 is connected to the output end of the open type current transformer in a positive direction, the diode D11 is connected to the output end of the open type current transformer in a reverse direction, the sampling resistors R20 and R21 are connected in series, one end of the sampling resistor R20 and one end of the R21 are connected in parallel to the output end of the open type current transformer, the capacitors C10 and C11 are connected in series, one end of the capacitors C10 and the other end of the C11 are connected in parallel to the output end of the open.
In a preferred embodiment of the present invention, the second filter circuit employs a digital filter.
In a preferred embodiment of the present invention, the power module includes an external power supply unit and a built-in battery unit for supplying power to the whole monitor.
In a preferred embodiment of the present invention, the monitor further comprises a real-time clock circuit connected to the digital signal processing circuit, and a clock battery connected to the real-time clock circuit.
In a preferred embodiment of the present invention, the monitor further comprises a memory module connected to the digital signal processing circuit.
Further, the storage module comprises a built-in storage unit and an extended storage unit.
The utility model has the advantages that: the utility model provides an instrument of electric current signal in can make things convenient for on-line monitoring recording line, but online continuous operation to the current signal in the circuit is acquireed to non-invasive mode, and gets off information record such as time, the amplitude of current signal, makes things convenient for inquiry, analysis, and can in time send information for maintainer, and the maintainer of being convenient for in time accomplishes electric power maintenance work.
Drawings
Fig. 1 is a block diagram of a preferred embodiment of the portable signal monitor of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1, an embodiment of the present invention includes:
a portable signal monitor comprises a power supply module, a digital signal processing circuit, a direct current signal monitoring circuit, an alternating current signal monitoring circuit, a real-time clock circuit, a wireless communication module, a man-machine interaction module and a storage module, wherein the direct current signal monitoring circuit is connected with the input end of the digital signal processing circuit, the wireless communication module is connected with the output end of the digital signal processing circuit, and the man-machine interaction module is connected with the storage module.
The power module comprises an external power supply unit and a built-in battery unit, the external power supply unit is used for providing an external alternating current and direct current power supply for the whole monitor, the power supply is conveniently acquired on site, and the built-in battery unit adopts a high-capacity lithium battery and can work under the condition of no external power supply.
The direct current signal monitoring circuit is used for sampling direct current signals in a line and comprises a direct current signal sampling circuit, a first filter circuit and a first ADC conversion circuit which are sequentially connected. The direct current signal sampling circuit comprises an open type Hall current sensor and a sampling resistor R1, wherein the sampling resistor R1 is connected in parallel with the output end of the open type Hall current sensor. The open type Hall current sensor is adopted, so that the direct current signal in the line can be conveniently acquired in a non-invasive mode under the condition that the system is electrified.
The alternating current signal monitoring circuit is used for sampling alternating current signals in a line and comprises an alternating current signal sampling circuit, a second ADC conversion circuit and a second filter circuit which are sequentially connected.
The alternating current signal sampling circuit comprises an open type current transformer, diodes D10, D11, sampling resistors R20, R21, filter resistors R30, R31, capacitors C10, C11 and a differential amplifier, wherein a positive input end and a negative input end of the differential amplifier are respectively connected with an output end of the open type current transformer through the filter resistors R30 and R31, a diode D10 is connected with the output end of the open type current transformer in the positive direction, a diode D11 is connected with the output end of the open type current transformer in the reverse direction, the sampling resistors R20 and R21 are connected in series, one end of the sampling resistor R20 and one end of the R21 are connected in parallel with the output end of the open type current transformer, the capacitors C10 and C11 are connected in series, one end of the capacitor C10 and the other end of the C11 are connected in parallel with the output end of the open type current transformer, and the other ends of the capacitors. The diodes D10 and D11 form input protection of the open type current transformer, R20 and R21 are sampling resistors of output signals of the current transformer, and the resistors R30 and R31, the capacitors C10 and C11 form a filter circuit of an alternating current signal sampling circuit.
Further, the second filter circuit adopts a digital filter.
The acquired current signal enters an ADC (analog to digital converter) circuit after being conditioned by a sampling filter circuit, the ADC circuit converts an analog signal into a digital signal and outputs the digital signal to a digital processing circuit, and the digital processing circuit is responsible for the coordination work of the functions of signal processing and display, man-machine interaction, storage, wireless transmission and the like.
The real-time clock circuit is used for providing stable time reference information for the digital signal processing circuit, and preferably, the input end of the real-time clock circuit is connected with a clock battery and used for providing a standby power supply for the real-time clock circuit when the power supply module stops supplying power.
The wireless communication module utilizes wireless communication network to send the sudden change information of current signal to the maintainer, supplies the maintainer in time to discover the circuit problem, accomplishes the electric power maintenance operation of overhauing. In this embodiment, the wireless communication module is an existing commercially available product.
The line signal change record is stored in a built-in memory, so that the historical record can be conveniently viewed and analyzed. Further, the memory module comprises a built-in memory unit and an extended memory unit, wherein the built-in memory unit is used for recording a work log of the current signal, and the extended memory unit is used for recording a work waveform of the current signal.
In order to facilitate the maintainers to check the current information, the man-machine interaction module can adopt a touch screen and keys for displaying and checking the current information.
The utility model discloses get up by orderly combination of functional modules such as open type current sensor, open type current transformer, signal sampling filter circuit, ADC converting circuit, digital processing circuit, communication circuit, man-machine interaction circuit, memory circuit, power supply circuit, constitute an instrument that can make things convenient for the current signal in the on-line monitoring recording line. During the use, the circuit that monitors as required selects direct current signal monitoring circuit or alternating current signal monitoring circuit to monitor, obtains the sampling current through the current sensor of monitor or current transformer's jaw, adopts outside alternating current-direct current power supply or built-in battery power supply as required, the current value condition in the signal monitor alright demonstration circuit to but the log information of automatic recording signal change, and can send the sudden change information of signal for the maintainer through wireless communication module. The recorded information of time, amplitude and the like of the abrupt change signal can be conveniently checked through a touch screen or key operation.
This portable signal monitor can online continuous operation to the current signal in the circuit is acquireed to non-invasive mode to get off information record such as time, the amplitude of current signal, make things convenient for inquiry, analysis, and can in time send information for maintainer, the maintainer of being convenient for in time accomplishes electric power maintenance work.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A portable signal monitor is characterized by comprising a power supply module, a digital signal processing circuit, a direct current signal monitoring circuit, an alternating current signal monitoring circuit, a wireless communication module and a man-machine interaction module, wherein the direct current signal monitoring circuit is connected with the input end of the digital signal processing circuit;
the direct current signal monitoring circuit comprises a direct current signal sampling circuit, a first filter circuit and a first ADC (analog-to-digital converter) conversion circuit which are sequentially connected;
the alternating current signal monitoring circuit comprises an alternating current signal sampling circuit, a second ADC conversion circuit and a second filter circuit which are connected in sequence.
2. The portable signal monitor of claim 1, wherein the dc current signal sampling circuit comprises an open hall current sensor and a sampling resistor R1, and the sampling resistor R1 is connected in parallel to an output terminal of the open hall current sensor.
3. The portable signal monitor as claimed in claim 1, wherein the AC current signal sampling circuit comprises an open-type current transformer, diodes D10, D11, sampling resistors R20, R21, filter resistors R30, R31, capacitors C10, C11, the differential amplifier, the positive input end of differential amplifier, the negative input end is respectively through filter resistance R30, R31 and open type current transformer's output links to each other, diode D10 forward is connected at open type current transformer's output, diode D11 backward is connected at open type current transformer's output, sampling resistor R20, R21 are established ties, sampling resistor R20's one end, R21's one end is parallelly connected in open type current transformer's output, electric capacity C10, C11 are established ties, electric capacity C10's one end, C11's the other end is parallelly connected in open type current transformer's output, electric capacity C10's the other end, the one end of C11 is grounded.
4. The portable signal monitor of claim 1, wherein the second filter circuit employs a digital filter.
5. The portable signal monitor of claim 1, wherein the power module comprises an external power supply unit and an internal battery unit for supplying power to the entire monitor.
6. The portable signal monitor of any one of claims 1 to 5, further comprising a real time clock circuit coupled to the digital signal processing circuit, and a clock battery coupled to the real time clock circuit.
7. The portable signal monitor of any one of claims 1 to 5, further comprising a memory module coupled to the digital signal processing circuit.
8. The portable signal monitor of claim 7, wherein the memory module comprises a built-in memory unit, an extended memory unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921048611.8U CN210347761U (en) | 2019-07-05 | 2019-07-05 | Portable signal monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921048611.8U CN210347761U (en) | 2019-07-05 | 2019-07-05 | Portable signal monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210347761U true CN210347761U (en) | 2020-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921048611.8U Active CN210347761U (en) | 2019-07-05 | 2019-07-05 | Portable signal monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210347761U (en) |
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2019
- 2019-07-05 CN CN201921048611.8U patent/CN210347761U/en active Active
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