CN216670119U - Novel low resistance test device - Google Patents
Novel low resistance test device Download PDFInfo
- Publication number
- CN216670119U CN216670119U CN202123298844.3U CN202123298844U CN216670119U CN 216670119 U CN216670119 U CN 216670119U CN 202123298844 U CN202123298844 U CN 202123298844U CN 216670119 U CN216670119 U CN 216670119U
- Authority
- CN
- China
- Prior art keywords
- resistor
- resistance
- control unit
- novel low
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model relates to the field of resistance testing, in particular to a novel low-resistance testing device, which comprises a shell, the shell is provided with a working panel, the working panel is provided with a display screen, a wiring terminal and a resistance adjusting button, the main control unit, the protection circuit, the test switch, the power supply module, the relay module and the variable resistor are arranged in the shell, the variable resistor of the utility model adjusts the size of the resistor through the resistor adjusting button, after the resistance data is tested, the variable resistance is properly adjusted and then the resistance is further tested, thereby obtaining a plurality of groups of data, comparing the plurality of groups of data to detect whether errors exist, recording a plurality of types of resistance parameter data in the data analysis device of the main control unit, when the resistor is tested, the resistor parameter is compared with the resistor parameter in the data analysis device, and whether an error exists or not is detected, so that the test accuracy is improved.
Description
Technical Field
The utility model relates to the field of resistance testing, in particular to a novel low-resistance testing device.
Background
In the prior art, a commercially available resistance tester or multimeter is generally used when resistance measurement is involved. However, when measuring the resistance of the initiating explosive device, the test current must be strictly limited to a small range of values (below 5 mA) for safety reasons. When the test current is very small, the voltage generated at the two ends of the tested resistor is very small, so that the directional interference potentials such as thermoelectric potential generated between dissimilar metals, primary battery potential and the like can seriously affect the test result, obviously, the common test equipment can not solve the problems, so that special test devices are provided, for example, a low-resistance measuring instrument is disclosed in a patent document with the publication number of CN101706534A, a microcontroller is used as a control core, the direction of the test current and the gain of an amplifier are changed by adopting a bidirectional precise direct current constant current source and a bidirectional program control gain amplifier, the voltage values of the tested resistor under the test currents in different directions are obtained, and the directional interference potentials can be eliminated by calculating the average voltage values generated by the positive test current and the negative test current.
Generally, in order to strictly ensure that the initiating explosive devices and the control paths thereof are normal, each initiating explosive device has a large number of resistance test items during quality inspection, and the method has the following defects:
(1) the testing mode is manual point-to-point testing, the testing efficiency is low, and the labor cost is high;
(2) the test item is the loop resistance of the selected initiating explosive device loop, the lead wire corresponding to the test item needs to be ensured to be correctly contacted with a meter pen of a tester during testing, and when the number of the lead wires is one, error testing and missing testing are easy to occur in manual measurement.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides a novel low-resistance testing device which is safe to use and accurate in testing.
(II) technical scheme
In order to achieve the purpose, the utility model provides the following technical scheme: a novel low resistance testing device comprises a shell, a working panel is arranged on the shell, a display screen, a wiring terminal and a resistance adjusting button are arranged on the working panel, the shell is internally provided with a main control unit, a protection circuit, a test switch, a power supply module, a relay module and a variable resistor, the protection circuit comprises a signal conditioning circuit, an analog-to-digital conversion circuit and a power-off protection circuit, the main control unit comprises a current detector, a voltage detector, a data existence device and a data analysis device, the main control unit is electrically connected with the display screen, the variable resistor and the power supply module, the variable resistor is connected with the control unit through the protection circuit, the wiring terminal is connected with the variable resistor through the relay module, the test switch is connected with the relay module, and the test switch is connected with the power supply module through the relay module.
In order to ensure the insulation effect of the shell, the utility model has the improvement that the shell is made of acrylic materials.
In order to improve the operation safety, the utility model improves that a storage groove is arranged on the shell, and an insulating glove is arranged in the storage groove.
In order to improve the detection accuracy, the utility model has the improvement that the signal conditioning circuit comprises a filter circuit and a differential amplification circuit; the filter circuit mainly comprises capacitors C50, C51 and C52 and resistors R108 and R109, and the differential amplifier circuit mainly comprises a differential instrument amplifier U19 and a high-precision resistor R110.
In order to improve the dustproof effect, the dustproof device is improved in that the shell is provided with a protective cover, and the protective cover is connected with the shell through a hinged shaft.
In order to facilitate monitoring of the electric quantity of the power supply module, the utility model is improved in that a battery electric quantity detector is mounted on the power supply module, a charging end is arranged on the power supply module, a charging port is arranged on the shell, the charging port is connected with the charging end, and the battery electric quantity detector is connected with the main control unit.
(III) advantageous effects
Compared with the prior art, the utility model provides a novel low-resistance testing device, which has the following beneficial effects:
the variable resistor of the utility model adjusts the size of the resistor through the resistor adjusting button, after the resistor data is tested, the variable resistor is properly adjusted and then the resistor is further tested, thus a plurality of groups of data are obtained, then the plurality of groups of data are compared to detect whether errors exist, a plurality of types of resistor parameter data are recorded in the data analysis device of the main control unit, the resistor is compared with the resistor parameters in the data analysis device when the resistor is tested, whether errors exist is detected, the voltage is filtered and differentially amplified through the signal conditioning circuit, the analog-to-digital conversion circuit collects related voltage signals and sends the voltage signals to the main control unit for calculation, the resistance values of the tested item under the test current in different directions are obtained, and the test result of the test item is obtained through averaging, thus the test accuracy is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the present invention;
in the figure: 1. a housing; 2. a working panel; 3. a display screen; 4. a wiring terminal; 5. a resistance adjusting knob; 6. hinging a shaft; 7. a protective cover; 8. a charging port; 9. a storage tank; 10. a test switch;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention is a novel low resistance testing device, including a housing 1, a working panel 2 is disposed on the housing 1, a display screen 3, a connecting terminal 4 and a resistance adjusting button 5 are disposed on the working panel 2, a main control unit, a protection circuit, a testing switch 10, a power module, a relay module and a variable resistor are disposed in the housing 1, the protection circuit includes a signal conditioning circuit, an analog-to-digital conversion circuit and a power-off protection circuit, the main control unit includes a current detector, a voltage detector, a data storage device and a data analysis device, the main control unit is electrically connected to the display screen 3, the variable resistor and the power module, the variable resistor is connected to the control unit through the protection circuit, the connecting terminal 4 is connected to the variable resistor through the relay module, the testing switch 10 is connected to the relay module, the test switch 10 is connected with the power supply module through the relay module.
In this embodiment, the housing 1 is made of acrylic material, so as to ensure the insulation effect of the housing 1 and prevent the occurrence of electric leakage.
In this embodiment, be equipped with storing groove 9 on casing 1, be equipped with insulating gloves in the storing groove 9, when the operation, wear insulating gloves at first, prevent electric leakage or produce static, guarantee the security of using.
In this embodiment, the signal conditioning circuit includes a filter circuit and a differential amplifier circuit; the filter circuit mainly comprises capacitors C50, C51 and C52 and resistors R108 and R109, and the differential amplification circuit mainly comprises a differential instrument amplifier U19 and a high-precision resistor R110, so that the precision of resistance testing is improved.
In this embodiment, the protection casing 7 is connected with the casing 1 through the articulated shaft 6, carries the dustproof effect, gets into the dust when preventing to deposit, causes the device unable to use.
In this embodiment, install battery level detector on the power module, the last charging end that is equipped with of power module, be equipped with charging mouth 8 on the casing 1, charging mouth 8 is connected with the charging end, battery level detector is connected with the main control unit, implements the electric quantity that detects power module, avoids the device can't use.
To sum up, when the novel low resistance testing device is used, a wire connected with a low resistance is in butt joint with a wiring terminal 4 and then is connected with a variable resistor through a relay module, the variable resistor is connected into a main control unit through a protection circuit, the relay protection module plays the functions of automatic adjustment, safety protection and switching circuit in the circuit, when the circuit leaks electricity or the voltage is insufficient, the circuit is closed in time to prevent accidents, the variable resistor adjusts the size of the resistor through a resistor adjusting button 5, after resistance data are tested, the variable resistor is further tested after being properly adjusted, so that a plurality of groups of data are obtained, whether errors exist in the plurality of groups of data are detected through comparison, a plurality of types of resistance parameter data are recorded in a data analysis device of the main control unit, and the resistance parameters in the data analysis device are compared when the resistor is tested, whether errors exist is detected, the voltage is filtered and differentially amplified through the signal conditioning circuit, the analog-to-digital conversion circuit collects related voltage signals and sends the voltage signals to the main control unit for calculation, resistance values of a tested item under test currents in different directions are obtained, a test result of the tested item is obtained through averaging, the test accuracy is improved, the main control power supply and the display screen 3 are powered on and started through the power supply module, electric quantity transmitted by a tested resistor is not occupied when the working state is guaranteed, the test accuracy is guaranteed, the power supply module and the relay motor module are controlled to be in an on or off state through the test switch 10, the data device is used for recording data of each test, a database is added, data comparison is carried out, the test accuracy is improved, the data storage device adopts an SD card, and data replacement or data arrangement is convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A novel low resistance testing device is characterized by comprising a shell (1), wherein a working panel (2) is arranged on the shell (1), a display screen (3), a wiring terminal (4) and a resistance adjusting button (5) are arranged on the working panel (2), a main control unit, a protection circuit, a testing switch (10), a power supply module, a relay module and a variable resistor are arranged in the shell (1), the protection circuit comprises a signal conditioning circuit, an analog-to-digital conversion circuit and a power-off protection circuit, the main control unit comprises a current detector, a voltage detector, a data storage device and a data analysis device, the main control unit is electrically connected with the display screen (3), the variable resistor and the power supply module, the variable resistor is connected with the control unit through the protection circuit, the wiring terminal (4) is connected with the variable resistor through the relay module, the testing switch (10) is connected with the relay module, and the testing switch (10) is connected with the power supply module through the relay module.
2. The novel low resistance testing device of claim 1, wherein the housing (1) is constructed of acrylic material.
3. A novel low resistance testing device according to claim 1, characterized in that a storage groove (9) is provided on the housing (1), and an insulating glove is provided in the storage groove (9).
4. The novel low resistance testing device of claim 1, wherein the signal conditioning circuit comprises a filter circuit and a differential amplifier circuit; the filter circuit mainly comprises capacitors C50, C51 and C52 and resistors R108 and R109, and the differential amplifier circuit mainly comprises a differential instrument amplifier U19 and a high-precision resistor R110.
5. A novel low resistance testing device according to claim 1, characterized in that a protective cover (7) is provided on the housing (1), said protective cover (7) being connected to the housing (1) by means of a hinge shaft (6).
6. The novel low resistance testing device according to claim 1, wherein a battery level detector is installed on the power module, a charging port is provided on the power module, a charging port (8) is provided on the housing (1), the charging port (8) is connected to the charging port, and the battery level detector is connected to the main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123298844.3U CN216670119U (en) | 2021-12-24 | 2021-12-24 | Novel low resistance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123298844.3U CN216670119U (en) | 2021-12-24 | 2021-12-24 | Novel low resistance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216670119U true CN216670119U (en) | 2022-06-03 |
Family
ID=81798845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123298844.3U Active CN216670119U (en) | 2021-12-24 | 2021-12-24 | Novel low resistance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216670119U (en) |
-
2021
- 2021-12-24 CN CN202123298844.3U patent/CN216670119U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10725110B2 (en) | Current detection system, method and device | |
| CN107247195B (en) | Handheld phase checking instrument applied to intelligent substation and phase checking method | |
| CN111505562B (en) | Test system for metering performance self-monitoring capability of electric energy meter | |
| CN216670119U (en) | Novel low resistance test device | |
| CN204256049U (en) | A kind of NEW TYPE OF COMPOSITE function earth resistance tester | |
| CN110954785A (en) | On-site protection prefabricated cable calibration device and method | |
| CN105891584A (en) | High-accuracy wide-measurement-range interchangeable and correctable clamp ammeter | |
| CN103018569B (en) | A kind of wire rod impedance instrument and method of testing | |
| CN215728720U (en) | Vehicle-mounted equipment test fixture | |
| CN103076484B (en) | electrical test system and method | |
| CN210123964U (en) | Junction box and photovoltaic panel assembly with same | |
| CN110895976A (en) | Dynamic card detection device and method | |
| CN117452249B (en) | Test equipment for detecting abnormal resistance | |
| CN206002633U (en) | A kind of portable engine electrical system automatic tester | |
| CN217605972U (en) | Impedance measuring device | |
| CN212433383U (en) | Ground resistance detection and calibration device of insulation monitoring device | |
| CN218158141U (en) | Energy storage system common mode interference detection device and system | |
| CN220855063U (en) | Electric performance detection tool and system for semiconductor gas sensor | |
| CN214585664U (en) | Comprehensive detection equipment capable of detecting current, voltage and resistance | |
| CN220568241U (en) | DC magneto-electric system galvanometer calibrating device | |
| CN215895777U (en) | Resistance measuring instrument with current-limiting protection | |
| CN220543028U (en) | Power supply internal resistance parameter measuring circuit and power supply internal resistance measuring instrument | |
| CN207007719U (en) | Portable arsenic analyzer | |
| CN211505717U (en) | Detection device for key components of high-low voltage cabinet of direct-current electric locomotive | |
| CN210861571U (en) | Wind speed and wind volume measuring device and efficient air port with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |