CN204256049U - A kind of NEW TYPE OF COMPOSITE function earth resistance tester - Google Patents

Abstract

The utility model discloses a novel composite function grounding resistance tester, which comprises a shell, a probe, a function control button, a knob, an LCD display screen and a functional circuit module placed inside the shell, and is characterized in that: the described function The circuit module includes a ground resistance test part, a GPS part and a clock part, wherein the ground resistance test part includes a DC/AC conversion function module, an AC amplification function module, a filter function module, An analog acquisition module and a reference value sampling module; the GPS part includes a GPS location positioning module and a GPS power management module; the clock part includes a clock module and a clock backup battery power supply module. The utility model skillfully integrates GPS function, clock function and grounding resistance tester together, plus large-capacity data storage function, has the characteristics of high intelligence, high precision, high cost performance, convenient and fast use.

Description

A new compound function grounding resistance tester

technical field

The utility model relates to the technical field of electronic measurement, in particular to a novel composite function grounding resistance tester.

Background technique

Existing ground resistance testers do not have GPS (location positioning) and clock (time recording) functions; and departments such as electric power, quality inspection and construction engineering often need long-term (different time points) detection and tracking of grounding in the same place or area Changes in resistance, which require cumbersome manual recording and are likely to cause human error.

Utility model content

In order to solve the above problems, the utility model discloses a new composite function grounding resistance tester, which integrates grounding resistance testing, clock recording and GPS functions, and records in detail the change of grounding resistance at a certain place at different times. It is convenient to monitor and record the grounding resistance value at the same location.

The technical scheme that the utility model adopts for realizing the above object is:

A new composite function grounding resistance tester, comprising a housing, a probe, a function control button, a knob, an LCD display and a functional circuit module placed inside the housing, characterized in that: the functional circuit module includes a grounding resistance The test part, the GPS part and the clock part, wherein the ground resistance test part includes a DC/AC conversion function module connected between the power supply and the microprocessor, an AC amplification function module, a filter function module, an analog acquisition module and a reference Value sampling module; the GPS part includes a GPS location positioning module and a GPS power management module; the clock part includes a clock module and a clock backup battery power supply module; the functional circuit module also includes an air humidity test part.

Further, the ground resistance testing part includes a ground resistance Re test module, an auxiliary ground resistance Rh test module, a probe ground resistance Rs test module, and a ground voltage and frequency test module.

Further, the filter function module includes a software and hardware analog filter function module and a digital filter function module.

Further, the functional circuit module also includes a data storage functional module, a maximum/minimum value functional module, a gear switching functional module, a comparison functional module, a backlight functional module and an average value processing functional module.

Further, the functional circuit module also includes a USB communication module.

Further, the function control buttons include 2-wire buttons, 3-wire buttons and 4-wire buttons, respectively corresponding to 2-wire test mode, 3-wire test mode and 4-wire test mode when testing grounding resistance.

The above functional modules are corresponding functional integration modules, such as DC/AC conversion function module, AC amplification function module, filter function module, analog acquisition module and reference value sampling module, GPS module, GPS Power management module, clock module and clock backup battery power supply module, etc.

The utility model has the advantages that: the utility model often needs long-term (at different time points) detection and tracking of the change of the grounding resistance in the same place or area for departments such as electric power, quality inspection and construction engineering, by testing the grounding resistance and recording the clock The (time record) function and GPS (location positioning) function are integrated into one body, which can record the grounding resistance change of a certain place at different times in detail, and display it in the form of a chart through the LCD, so that you can intuitively see that a certain place is The change of grounding resistance at different times provides convenience for long-term monitoring and recording of the grounding resistance value at the same place, so that a more comprehensive and accurate conclusion can be drawn, which provides important reference and reference for grounding construction and testing in the same area determination.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Description of drawings

FIG. 1 is a schematic diagram of the module structure of this embodiment.

Detailed ways

Embodiment, referring to Fig. 1, the novel composite function grounding resistance tester provided by this embodiment includes a housing, a probe, a function control button, a knob, an LCD display screen and a functional circuit module placed inside the housing, the described The functional circuit module includes a ground resistance test part, a GPS part and a clock part, wherein the ground resistance test part includes a DC/AC conversion function module, an AC amplification function module, and a filter function module sequentially connected between the power supply and the microprocessor . An analog acquisition module and a reference value sampling module; the GPS part includes a GPS location positioning module and a GPS power management module; the clock part includes a clock module and a clock backup battery power supply module. The GPS location positioning module of the GPS part is used for location positioning and records the latitude and longitude of the measurement location, and the clock module of the clock part is used for clock recording, such as: 17:30 on January 8, 2015. The functional circuit module also includes an air humidity testing part, the air humidity testing part includes an air humidity testing module, which is used to detect the air humidity at the place where the new composite function grounding resistance tester is located, and is used to compare the relationship between the air humidity and the grounding resistance.

The ground resistance test part includes a ground resistance Re test module, an auxiliary ground resistance Rh test module, a probe ground resistance Rs test module, and a ground voltage and frequency test module, respectively detecting the ground resistance Re, the auxiliary ground resistance Rh, and the probe ground Resistor Rs and ground voltage and frequency.

The filter function module includes a software and hardware analog filter function module and a digital filter function module. Signal quality can be improved by analog filtering and digital filtering to reduce the workload and difficulty of subsequent data processing.

The functional circuit module also includes a data storage function module, a maximum/minimum value function module, a gear position switching function module, a comparison function module, a backlight function module and an average value processing function module, respectively corresponding SAVE (data storage) Function control button, MAX/MIN (maximum/minimum value) function control button, RANGE (switch automatic and manual gear) function control button, COMP (comparison) function control button, LIGHT (backlight) function control button, AVERAGE (average value processing) function control button.

The functional circuit module also includes a USB communication module, which is used for data transmission by connecting a computer or the like to the USB communication module through a data line.

The function control buttons include 2-wire buttons, 3-wire buttons and 4-wire buttons, respectively corresponding to 2-wire test mode, 3-wire test mode and 4-wire test mode when testing grounding resistance. Users can use 2-wire test mode, 3-wire test mode or 4-wire test mode to improve measurement accuracy according to needs.

The above functional modules are corresponding functional integration modules, such as DC/AC conversion function module, AC amplification function module, filter function module, analog acquisition module and reference value sampling module, GPS module, GPS Power management module, clock module and clock backup battery power supply module, etc.

The new composite function grounding resistance tester of this embodiment, the test signal frequency is 94Hz and 128Hz; Test signal voltage: 45V alternating current; Short-circuit current: about 80mA; Grounding resistance Re is 0.05Ω～1999Ω, and measurement accuracy is ±(3%+5 ); the auxiliary grounding resistance Rh is 0-50kΩ, and the measurement accuracy is ±8%; the auxiliary grounding resistance Rs is 0-50kΩ, and the measurement accuracy is ±8%.

This embodiment often needs long-term (different point in time) detection and tracking at the same place or area grounding resistance change situation for departments such as electric power, quality inspection and construction engineering, by combining grounding resistance test, clock record (time record) function and GPS (Location positioning) function is integrated, it can record in detail the change of grounding resistance of a certain place at different times, and display it in the form of a chart through LCD, and can intuitively see the change of grounding resistance of a certain place at different times , which provides convenience for long-term monitoring and recording of the grounding resistance value at the same place, so that a more comprehensive and accurate conclusion can be drawn, and an important reference and judgment can be provided for the grounding construction and detection in the same area.

The utility model is not limited to the above-mentioned embodiments, and other new composite function grounding resistance testers obtained by using the same or similar devices as the above-mentioned embodiments of the utility model are within the scope of protection of the utility model.

Claims (6)

1. A novel composite function grounding resistance tester, comprising a housing, a probe, a function control button, a knob, an LCD display and a functional circuit module placed inside the housing, characterized in that: the functional circuit module includes Ground resistance test part, GPS part and clock part, wherein said ground resistance test part includes DC/AC conversion function module, AC amplification function module, filter function module, analog acquisition module connected in sequence between power supply and microprocessor and a reference value sampling module; the GPS part includes a GPS location positioning module and a GPS power management module; the clock part includes a clock module and a clock backup battery power supply module; the functional circuit module also includes an air humidity test part. 2. novel composite function earth resistance tester according to claim 1, is characterized in that: described earth resistance test part comprises earth resistance Re test module, auxiliary earth resistance Rh test module, probe earth resistance Rs test module and Ground voltage and frequency test module. 3. The new composite function grounding resistance tester according to claim 1, characterized in that: said filter function module includes a software and hardware analog filter function module and a digital filter function module. 4. The novel composite function grounding resistance tester according to claim 1, characterized in that: said functional circuit module also includes a data storage function module, a maximum/minimum value function module, a gear switching function module, a comparison function module, A backlight function module and an average value processing function module. 5. The novel composite function grounding resistance tester according to claim 1, characterized in that: the functional circuit module also includes a USB communication module. 6. The novel composite function grounding resistance tester according to claim 1, characterized in that: the function control buttons include 2-wire buttons, 3-wire buttons and 4-wire buttons, which respectively correspond to the 2-wire test mode when testing the grounding resistance , 3-wire test mode and 4-wire test mode.