CN112180173A - Measuring device - Google Patents
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- CN112180173A CN112180173A CN202011039262.0A CN202011039262A CN112180173A CN 112180173 A CN112180173 A CN 112180173A CN 202011039262 A CN202011039262 A CN 202011039262A CN 112180173 A CN112180173 A CN 112180173A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/14—Measuring resistance by measuring current or voltage obtained from a reference source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Abstract
A measuring device for measuring resistance or capacitance, comprising: the device comprises a main control module, a capacitance measuring module and a resistance measuring module; the main control module is respectively connected with the capacitance measuring module and the resistance measuring module and is configured to send a first control instruction to the capacitance measuring module and/or send a second control instruction to the resistance measuring module, receive a numerical signal sent by the capacitance measuring module and/or the resistance measuring module and process the numerical signal to obtain capacitance data and/or resistance data correspondingly; the capacitance measuring module is used for receiving the first control instruction, measuring capacitance data of one device to be measured in the multiple devices to be measured according to the first control instruction and sending a measured numerical value signal to the main control module; the resistance measurement module is configured to receive the second control instruction, measure resistance data of one device to be measured of the multiple devices to be measured according to the second control instruction, and send the measured numerical value signal to the main control module.
Description
Technical Field
The embodiment of the application relates to but not limited to the field of measurationing, especially relates to a measuring device.
Background
The resistance/capacitance is one of the important electrical characteristics of electronic materials and sensors, and has a very rich measurement requirement. In some technologies, devices for measuring resistance/capacitance are mainly classified into two types: one type is high-precision resistance/capacitance equipment, which is characterized by high measurement precision, high speed, real-time and continuous data recording, communication with terminals such as man-machine interaction equipment, and convenient data collection and display. The other type is a hand-held resistance/capacitance measuring device which is characterized in that the device is provided with a battery for power supply, can be carried about, has low price, and can rapidly represent the resistance/capacitance of an object to be measured.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The present disclosure provides a measuring device, which can measure the resistance/capacitance values of a plurality of devices to be measured at one time.
The measuring device provided by the present disclosure is used for measuring a resistor or a capacitor, and the measuring device includes: the device comprises a main control module, a capacitance measuring module and a resistance measuring module;
the main control module is respectively connected with the capacitance measuring module and the resistance measuring module and is configured to send a first control instruction to the capacitance measuring module and/or send a second control instruction to the resistance measuring module, receive a numerical signal sent by the capacitance measuring module and/or the resistance measuring module, and process the numerical signal to obtain capacitance data and/or resistance data correspondingly;
the capacitance measuring module is configured to receive the first control instruction, measure capacitance data of one device to be measured in the multiple devices to be measured according to the first control instruction, and send a measured numerical signal to the main control module;
the resistance measurement module is configured to receive the second control instruction, measure resistance data of one device to be measured of the multiple devices to be measured according to the second control instruction, and send the measured numerical signal to the main control module.
In an exemplary embodiment, the metrology apparatus further comprises: a Bluetooth module;
the main control module is also configured to send the resistance data and/or the capacitance data obtained by processing to the Bluetooth module;
and the Bluetooth module is arranged to receive the resistance data and/or the capacitance data and send the resistance data and/or the capacitance data to a corresponding terminal, so that the terminal can display the resistance data and/or the capacitance data in real time and store the resistance data and/or the capacitance data in the terminal.
In an exemplary embodiment, the main control module is further configured to send a command for controlling transmission speed to the bluetooth module;
the Bluetooth module is further configured to receive the control transmission speed instruction and transmit the resistance data and/or the capacitance data according to a speed corresponding to the control transmission speed instruction.
In an exemplary embodiment, the measurement apparatus further comprises a multi-channel resistor interface, a multi-channel capacitor interface;
the multi-channel resistor interface is arranged to be connected with a plurality of devices to be tested, and each resistor interface is connected with different devices to be tested;
the multi-channel capacitor interface is arranged to be connected with a plurality of devices to be tested, and each capacitor interface is connected with different devices to be tested respectively.
In an exemplary embodiment, the resistance measuring module includes a resistance measuring unit to be measured and a shift resistance measuring unit;
the resistance measuring unit to be measured comprises a first gate, a second gate, a first analog-to-digital converter (ADC) and a first voltage follower; the input end of the first gate and the input end of the second gate are connected with the multi-channel resistor interface, wherein the multi-channel resistor interface is correspondingly connected with the input end of the first gate and the input end of the second gate one by one; the output end of the first gate is connected with the input end of the first voltage follower, the output end of the first voltage follower is connected with the input end of the first ADC, and the output end of the first ADC is connected with the main control module as the output end of the resistance measuring unit to be measured; the output end of the second gate is connected with the output end of a third gate in the gear resistance measuring unit;
the gear resistance measuring unit comprises a plurality of gear resistances, a third gate, a fourth gate, a second analog-to-digital converter (ADC) and a second voltage follower; the input ends of the third gate and the fourth gate are correspondingly connected one by one; one side of each gear resistor is connected with a power supply, and the other side of each gear resistor is correspondingly connected with the input ends of the third gate and the fourth gate one by one; the output end of the fourth gate is connected with the input end of the second voltage follower, the output end of the second voltage follower is connected with the input end of the second ADC, and the output end of the second ADC is connected with the main control module as the output end of the gear resistance measuring unit.
In an exemplary embodiment, the main control module is further configured to send a second control instruction for indicating to-be-connected devices to be tested to the first gate and the second gate at the same time;
the first gating device and the second gating device connect the output end of the gating device with the appointed input end of the gating device according to the received second control instruction;
the master control module is also arranged to send a second control instruction for indicating the gear resistance to be connected to the third gate and the fourth gate at the same time;
and the third gate and the fourth gate connect the output end of the gate to the specified input end of the gate according to the received second control instruction, so that the shift resistor connected with the connected input end is connected with the resistor of the equipment to be tested in series.
In an exemplary embodiment, the main control module is further configured to perform conversion calculation on the received numerical signal sent by the second analog-to-digital converter ADC to obtain a voltage value; obtaining a current value passing through the gear resistor according to the voltage value and the resistance value of the gear resistor; calculating the received digital signal sent by the first analog-to-digital converter ADC to obtain a voltage value; and calculating the resistance value of the equipment to be tested according to the voltage value and the current value of the gear resistor.
In an exemplary embodiment, the measurement apparatus further comprises a single-pole double-throw switch, a single-channel resistor interface, a single-channel capacitor interface;
the single-channel resistor interface is connected with the first movable end of the single-pole double-throw switch and the resistance measuring module;
the single-channel capacitor interface is connected with the second movable end of the single-pole double-throw switch and the capacitor measuring module;
the fixed end of the single-pole double-throw switch is connected with the first test end of a single device to be tested, and the other test end of the single device to be tested is grounded.
In an exemplary embodiment, the capacitance measured by the capacitance measuring module ranges from 0 to 30 pF.
In an exemplary embodiment, the metrology apparatus further comprises: n indicator lamps, wherein N is an integer greater than 2;
the indicator light is arranged in the middle of the multi-channel resistor interface and the multi-channel capacitor interface and is respectively used for indicating the working state and the charging state of the measuring device.
The embodiment of the present disclosure discloses a measuring device, which is used for measuring a resistor or a capacitor, and includes: the device comprises a main control module, a capacitance measuring module and a resistance measuring module; the main control module is respectively connected with the capacitance measuring module and the resistance measuring module and is configured to send a first control instruction to the capacitance measuring module and/or send a second control instruction to the resistance measuring module, receive a numerical signal sent by the capacitance measuring module and/or the resistance measuring module, and process the numerical signal to obtain capacitance data and/or resistance data correspondingly; the capacitance measuring module is configured to receive the first control instruction, measure capacitance data of one device to be measured in the multiple devices to be measured according to the first control instruction, and send a measured numerical signal to the main control module; the resistance measurement module is configured to receive the second control instruction, measure resistance data of one device to be measured of the plurality of devices to be measured according to the second control instruction, and send the measured numerical signal to the main control module. By the scheme, the resistance/capacitance values of the devices to be tested can be measured simultaneously.
Other aspects will be apparent upon reading and understanding the attached drawings and detailed description.
Drawings
FIG. 1 is a schematic view of a measurement apparatus according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a resistance measurement module in some exemplary embodiments;
FIG. 3 is a schematic view of a metrology apparatus in some exemplary embodiments.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 1 is a schematic view of a measurement apparatus according to an embodiment of the present disclosure, as shown in fig. 1, including: a main control module 100, a capacitance measuring module 101 and a resistance measuring module 102;
the main control module 100 is connected to the capacitance measuring module and the resistance measuring module, and configured to send a first control instruction to the capacitance measuring module, and/or send a second control instruction to the resistance measuring module, receive a numerical signal sent by the capacitance measuring module and/or the resistance measuring module, and process the numerical signal to obtain capacitance data and/or resistance data;
the capacitance measuring module 101 is configured to receive the first control instruction, measure capacitance data of one device to be measured of the multiple devices to be measured according to the first control instruction, and send a measured numerical signal to the main control module;
the resistance measurement module 102 is configured to receive the second control instruction, measure resistance data of one device to be measured of the multiple devices to be measured according to the second control instruction, and send a measured numerical signal to the main control module.
In some exemplary embodiments, the main control module includes a single chip, such as a 51-chip, an STM32, and the like, and the chip may be used to control the capacitance measuring module 101 and the resistance measuring module 102 to perform related functions.
In some exemplary embodiments, the main control module 100 may input related control instructions through a human-machine interface or an interface; the main control module 100 may also be stored in a chip of the main control module according to a pre-programmed script file, and the main control module 100 executes a related control instruction according to the script file; the control instruction can be a first control instruction or a second control instruction which is sent according to a preset time interval; and determining to send the first control instruction or the second control instruction according to the script file.
In some exemplary embodiments, the metrology apparatus further comprises: a Bluetooth module; the main control module is also configured to send the resistance data and/or the capacitance data obtained by processing to the Bluetooth module; the Bluetooth module is arranged to receive the resistance data and/or the capacitance data and send the resistance data and/or the capacitance data to the corresponding terminal, so that the terminal can display the resistance data and/or the capacitance data in real time and store the resistance data and/or the capacitance data in the terminal.
In some exemplary embodiments, the master control module is further configured to send a control transmission speed command to the bluetooth module; the Bluetooth module is also configured to receive a transmission control speed command and transmit resistance data and/or capacitance data according to a speed corresponding to the transmission control speed command.
In some exemplary embodiments, the measurement apparatus further comprises a multi-channel resistive interface, a multi-channel capacitive interface; the multi-channel resistor interface is arranged to be connected with a plurality of devices to be tested, and each resistor interface is respectively connected with different devices to be tested; the multi-channel capacitor interface is arranged to be connected with a plurality of devices to be tested, and each capacitor interface is connected with different devices to be tested respectively. In this embodiment, the multi-channel resistor interface and the multi-channel capacitor interface may adopt slot interfaces such as FPC and dupont bus. After the connection of the multiple devices to be measured and the multi-channel resistor interface or the multi-channel capacitor interface is completed, the channels corresponding to the devices are sequentially gated, namely the resistance/capacitance values of the devices to be measured are sequentially measured, so that the multiple devices are measured after one-time connection.
In some exemplary embodiments, as shown in fig. 2, the resistance measurement module includes a resistance measurement unit to be tested and a shift resistance measurement unit; the resistance measuring unit to be measured comprises a first gate, a second gate, a first analog-to-digital converter (ADC) and a first voltage follower; the input end of the first gate and the input end of the second gate are connected with the multi-channel resistor interface, wherein the multi-channel resistor interface is correspondingly connected with the input end of the first gate and the input end of the second gate one by one; the output end of the first gate is connected with the input end of the first voltage follower, the output end of the first voltage follower is connected with the input end of the first ADC, and the output end of the first ADC is connected with the main control module as the output end of the resistance measuring unit to be measured; the output end of the second gate is connected with the output end of a third gate in the gear resistance measuring unit; the gear resistance measuring unit comprises a plurality of gear resistances, a third gate, a fourth gate, a second analog-to-digital converter (ADC) and a second voltage follower; the input ends of the third gate and the fourth gate are correspondingly connected one by one; one side of each gear resistor is connected with a power supply, and the other side of each gear resistor is correspondingly connected with the input ends of the third gate and the fourth gate one by one; the output end of the fourth gate is connected with the input end of the second voltage follower, the output end of the second voltage follower is connected with the input end of the second ADC, and the output end of the second ADC is connected with the main control module as the output end of the gear resistance measuring unit.
In some exemplary embodiments, the master control module is further configured to send a second control instruction for indicating a device to be tested to be connected to the first gate and the second gate at the same time; the first gating device and the second gating device connect the output end of the gating device with the appointed input end of the gating device according to the received second control instruction; the master control module is also arranged to send a second control instruction for indicating the gear resistance to be connected to the third gate and the fourth gate at the same time; and the third gate and the fourth gate connect the output end of the gate to the specified input end of the gate according to the received second control instruction, so that the shift resistor connected with the connected input end is connected with the resistor of the equipment to be tested in series. In this embodiment, the connected tap resistor is connected in series with the resistor of the device under test, and enters an operating state when the tap resistor measuring unit is connected to the negative terminal (GND) and the positive terminal (VDD) of the power supply.
In some exemplary embodiments, the main control module is further configured to perform conversion calculation on the received numerical signal sent by the second analog-to-digital converter ADC to obtain a voltage value; obtaining a current value passing through the gear resistor according to the voltage value and the resistance value of the gear resistor; calculating the received digital signal sent by the first analog-to-digital converter ADC to obtain a voltage value; and calculating the resistance value of the equipment to be tested according to the voltage value and the current value of the gear resistor.
In some exemplary embodiments, the measurement apparatus further comprises a single-pole double-throw switch, a single-channel resistor interface, a single-channel capacitor interface; therefore, the single-channel resistor interface is connected with the first movable end of the single-pole double-throw switch and the resistance measuring module; the single-channel capacitor interface is connected with the second movable end of the single-pole double-throw switch and the capacitance measuring module; the fixed end of the single-pole double-throw switch is connected with the first test end of a single device to be tested, and the other test end of the single device to be tested is grounded. The single-channel resistor interface and the single-channel capacitor interface comprise two terminals, and the interface can be any one of BNC, TNC, IPEX, UHF, FME, PAL or MCX.
In this embodiment, the single-channel resistor and the single-channel capacitor share the measurement interface, and the switching may also be realized by an electronic switch.
In some exemplary embodiments, when the single-channel capacitance interface is connected to the second moving terminal of the single-pole double-throw switch and the capacitance measurement module to form a single-channel capacitance measurement path, the capacitance measured by using the single-channel capacitance measurement path is in a range of 0 to 30 pF; wherein, the measurement precision is better within 0-20 pF. The core device of the capacitance measuring module can be an integrated capacitance measuring chip, the detectable capacitance range of the chip is less than 50nF, more preferably less than 500pF, the single-pole double-throw switch is connected with a single-channel capacitance interface to detect the capacitance less than 20pF, the measuring precision is better within 0-20 pF, and the capacitance measuring error in the measuring range can reach less than or equal to 2%.
In some exemplary embodiments, the metrology apparatus further comprises: n indicator lamps, wherein N is an integer greater than 2; the indicator light is arranged in the middle of the multi-channel resistor interface and the multi-channel capacitor interface and is respectively used for indicating the working state and the charging state of the measuring device. For example: the measuring device is provided with 2 indicator lights, wherein one indicator light is in a color A, such as white, and is turned on when the measuring device is powered on and turned off when the measuring device is powered off, and the working state of the measuring device can be indicated by adopting the indicator light. The other indicator light is a color variable indicator light, the indicator light is in color B/C, such as red/orange, when the measuring device is charged, and the indicator light is in color D, such as green, when the measuring device is charged. The indicator light is used for indicating the charging state of the measuring device. The indicator light is located on the same side as the multi-channel resistor/capacitor interface, and the indicator light is located between the two multi-channel resistor/capacitor interfaces.
The embodiment is based on the measuring equipment with multiple channels, and can measure the resistance/capacitance value of a single device to be measured, and can also measure the resistance/capacitance values of a plurality of devices to be measured simultaneously. The measuring device is not provided with a display screen, so that the measuring device is smaller in size, lighter in weight and more convenient to carry. And transmitting the measured resistance/capacitance data to the mobile terminal through Bluetooth transmission, and continuously displaying the resistance/capacitance data on a display screen of the mobile terminal in real time.
In some exemplary embodiments, as shown in fig. 2, a hardware architecture diagram of a resistance measurement module includes a resistance measurement unit to be tested and a shift resistance measurement unit;
the resistance measuring unit to be measured comprises a first gate, a second gate, a first analog-to-digital converter (ADC) and a first voltage follower;
the gear resistance measuring unit comprises a plurality of gear resistances, a third gate, a fourth gate, a second analog-to-digital converter (ADC) and a second voltage follower.
In a hardware architecture diagram of the resistance measurement module, an input end of a first gate and an input end of a second gate are connected with a multi-channel resistance interface, wherein the multi-channel resistance interface is correspondingly connected with the input end of the first gate and the input end of the second gate one by one; the output end of the first gate is connected with the input end of the first voltage follower, the output end of the first voltage follower is connected with the input end of the first ADC, and the output end of the first ADC is connected with the main control module as the output end of the resistance measuring unit to be measured; the output end of the second gate is connected with the output end of a third gate in the gear resistance measuring unit; the input ends of the third gate and the fourth gate are correspondingly connected one by one; one side of each gear resistor is connected with a power supply, and the other side of each gear resistor is correspondingly connected with the input ends of the third gate and the fourth gate one by one; the output end of the fourth gate is connected with the input end of the second voltage follower, the output end of the second voltage follower is connected with the input end of the second ADC, and the output end of the second ADC is connected with the main control module as the output end of the gear resistance measuring unit.
The core of the resistance measuring module is a voltage division method resistance measuring circuit module which can detect the resistance within the range of 0-2G omega, more preferably 0-200M omega, more preferably 2-20M omega, and the resistance measuring error within the range is less than or equal to 0.8%.
In some exemplary embodiments, an implementation process for measuring a plurality of devices under test by using the measurement apparatus in any of the above embodiments includes the following steps 1 to 11:
step 1, connecting a plurality of devices to be tested with a multi-channel resistor interface, wherein each resistor interface is respectively connected with different devices to be tested.
In this step, the multi-channel resistor interfaces are connected to the input terminal of the first gate in the measurement apparatus and the input terminal of the second gate in the measurement apparatus, the number of the multi-channel resistor interfaces may be 8, 16 or 32, and the number of the multi-channel resistor interfaces is set according to the requirement.
And 2, the main control module simultaneously sends a second control instruction for indicating the to-be-connected equipment to be tested to the first gating device and the second gating device.
And 3, the first gating device and the second gating device receive a second control instruction sent by the main control module, and the output end of the gating device is connected with the specified input end of the gating device according to the second control instruction.
In this step, the corresponding multi-channel resistor interface is gated according to the second control instruction, and the multi-channel resistor interfaces may be sequentially connected according to a preset time interval; for example: when the first gate and the second gate receive a second control command of 0000 at the same time, the first channel resistance interface is switched on, and when the second control command of 0001, the second channel resistance interface is switched on. As shown in fig. 2, the left first interface may be used as the first channel resistance interface or the right first interface may be used as the first channel resistance interface, which is not limited in particular.
And 4, the main control module simultaneously sends a second control instruction for indicating the gear resistance to be connected to the third gate and the fourth gate.
And 5, the third gating device and the fourth gating device receive the second control instruction, and the output end of the gating device is connected with the specified input end of the gating device according to the second control instruction, so that the gear resistor connected with the connected input end is connected with the resistor of the equipment to be tested in series.
Step 6, a first analog-to-digital converter ADC in the resistance module to be measured sends the measured digital signal to a main control module; and a second analog-to-digital converter (ADC) in the gear resistor module sends the measured digital signal to the main control module.
Step 7, the main control module carries out conversion calculation on the received numerical signals sent by the second analog-to-digital converter ADC to obtain voltage values; calculating the received digital signal sent by the first analog-to-digital converter ADC to obtain a voltage value;
step 8, obtaining the current value passing through the gear resistor according to the voltage value and the resistance value of the gear resistor; calculating the resistance value of the equipment to be tested according to the voltage value and the current value of the gear resistor and the ohm law;
and 9, the main control module sends the resistance data obtained by processing to the Bluetooth module.
And step 10, the Bluetooth module receives the resistance data and sends the resistance data to a corresponding terminal so that the terminal can display the resistance data in real time and store the resistance data in the terminal.
And step 11, turning to the step 2, sequentially and repeatedly executing the steps 2-10, and ending the process after the to-be-tested equipment of all channels is executed.
In the exemplary embodiment, the multi-pass resistance measurement method is a series resistance voltage division method, and the basic circuit thereof is as follows: the resistor to be measured and the gear resistor with known resistance are connected in series and connected to the positive end and the negative end of the power supply. The positive terminal of the power supply is a positive voltage, and the negative terminal is grounded. The current value of the series circuit can be calculated by measuring the voltage at the two ends of the gear resistor, so that the current value flowing through the resistor to be measured is obtained. The resistance value of the resistor of the equipment to be tested is calculated by measuring the voltage at two ends of the resistor of the equipment to be tested and combining the current value of the series circuit according to the ohm law.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (10)
1. A measuring device for measuring resistance or capacitance, the measuring device comprising: the device comprises a main control module, a capacitance measuring module and a resistance measuring module;
the main control module is respectively connected with the capacitance measuring module and the resistance measuring module, and is configured to send a first control instruction to the capacitance measuring module, and/or send a second control instruction to the resistance measuring module, receive a numerical signal sent by the capacitance measuring module and/or the resistance measuring module, and process the numerical signal to obtain capacitance data and/or resistance data correspondingly;
the capacitance measuring module is configured to receive the first control instruction, measure capacitance data of one device to be measured in the multiple devices to be measured according to the first control instruction, and send a measured numerical signal to the main control module;
the resistance measurement module is configured to receive the second control instruction, measure resistance data of one device to be measured of the multiple devices to be measured according to the second control instruction, and send the measured numerical signal to the main control module.
2. The metrology apparatus of claim 1, further comprising: a Bluetooth module;
the main control module is also configured to send the resistance data and/or the capacitance data obtained by processing to the Bluetooth module;
and the Bluetooth module is arranged to receive the resistance data and/or the capacitance data and send the resistance data and/or the capacitance data to a corresponding terminal, so that the terminal can display the resistance data and/or the capacitance data in real time and store the resistance data and/or the capacitance data in the terminal.
3. The apparatus of claim 2,
the main control module is also configured to send a transmission speed control instruction to the Bluetooth module;
the Bluetooth module is further configured to receive the control transmission speed instruction and transmit the resistance data and/or the capacitance data according to a speed corresponding to the control transmission speed instruction.
4. The measurement apparatus of claim 1, further comprising a multi-channel resistor interface, a multi-channel capacitor interface;
the multi-channel resistor interface is arranged to be connected with a plurality of devices to be tested, and each resistor interface is connected with different devices to be tested;
the multi-channel capacitor interface is arranged to be connected with a plurality of devices to be tested, and each capacitor interface is connected with different devices to be tested respectively.
5. The measuring apparatus of claim 4, wherein the resistance measuring module comprises a to-be-measured resistance measuring unit and a shift-level resistance measuring unit;
the resistance measuring unit to be measured comprises a first gate, a second gate, a first analog-to-digital converter (ADC) and a first voltage follower; the input end of the first gate and the input end of the second gate are connected with the multi-channel resistor interface, wherein the multi-channel resistor interface is correspondingly connected with the input end of the first gate and the input end of the second gate one by one; the output end of the first gate is connected with the input end of the first voltage follower, the output end of the first voltage follower is connected with the input end of the first ADC, and the output end of the first ADC is connected with the main control module as the output end of the resistance measuring unit to be measured; the output end of the second gate is connected with the output end of a third gate in the gear resistance measuring unit;
the gear resistance measuring unit comprises a plurality of gear resistances, a third gate, a fourth gate, a second analog-to-digital converter (ADC) and a second voltage follower; the input ends of the third gate and the fourth gate are correspondingly connected one by one; one side of each gear resistor is connected with a power supply, and the other side of each gear resistor is correspondingly connected with the input ends of the third gate and the fourth gate one by one; the output end of the fourth gate is connected with the input end of the second voltage follower, the output end of the second voltage follower is connected with the input end of the second ADC, and the output end of the second ADC is connected with the main control module as the output end of the gear resistance measuring unit.
6. The apparatus of claim 5,
the master control module is also arranged for sending a second control instruction for indicating to-be-connected equipment to be tested to the first gate and the second gate at the same time;
the first gating device and the second gating device connect the output end of the gating device with the appointed input end of the gating device according to the received second control instruction;
the master control module is also arranged to send a second control instruction for indicating the gear resistance to be connected to the third gate and the fourth gate at the same time;
and the third gate and the fourth gate connect the output end of the gate to the specified input end of the gate according to the received second control instruction, so that the shift resistor connected with the connected input end is connected with the resistor of the equipment to be tested in series.
7. The apparatus of claim 6,
the main control module is further configured to perform conversion calculation on the received numerical signal sent by the second analog-to-digital converter ADC to obtain a voltage value; obtaining a current value passing through the gear resistor according to the voltage value and the resistance value of the gear resistor; calculating the received digital signal sent by the first analog-to-digital converter ADC to obtain a voltage value; and calculating the resistance value of the equipment to be tested according to the voltage value and the current value of the gear resistor.
8. The measurement apparatus of claim 1, further comprising a single-pole double-throw switch, a single-channel resistor interface, a single-channel capacitor interface;
the single-channel resistor interface is connected with the first movable end of the single-pole double-throw switch and the resistance measuring module;
the single-channel capacitor interface is connected with the second movable end of the single-pole double-throw switch and the capacitor measuring module;
the fixed end of the single-pole double-throw switch is connected with the first test end of a single device to be tested, and the other test end of the single device to be tested is grounded.
9. The measurement apparatus of claim 8, wherein the capacitance measurement module measures a capacitance in a range of 0 to 30 pF.
10. The metrology apparatus of claim 7, further comprising: n indicator lamps, wherein N is an integer greater than 2;
the indicator light is arranged in the middle of the multi-channel resistor interface and the multi-channel capacitor interface and is respectively used for indicating the working state and the charging state of the measuring device.
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