Integrated rapid calibration device for formation and fractionation equipment

Abstract

An integrated rapid calibration device for formation and capacitance separation equipment includes a host computer connected to a switch via Ethernet; the switch signals connect a device to be calibrated and several independent working devices; the device to be calibrated is connected to a calibration unit via voltage and current lines and wireless signals, and the calibration unit comprises a calibration main processor, an FPGA coprocessor, a signal relay board, a multimeter, and a voltage and current connection board, and operates via an external power supply; the test port of the multimeter is electrically connected to the calibration port of the device to be calibrated. The calibration main processor includes a precision calibration circuit for adjusting measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring the accuracy of coaxial cable signals. The present invention significantly improves the precision calibration circuit and the coaxiality calibration circuit based on the invention with publication number 115166614A, improving the sensitivity of detecting probe contact status, the accuracy of precision calibration, and energy utilization efficiency.

Description

Technical Field

[0001] The invention belongs to the field of battery formation and capacity separation, and in particular relates to an integrated rapid correction device for formation and capacity separation equipment. Background Art

[0002] To ensure the operating accuracy of battery testing equipment such as formation and capacity grading equipment, precise calibration and metrology tools are required for regular calibration. Different calibration units are used to calibrate different components, including calibration units, line sequence tools, coaxiality detection tools, mold change tools, and negative pressure tools. Patent Publication No. 115166614A discloses a three-in-one rapid calibration device for formation and capacity grading equipment to overcome the time-consuming and labor-intensive recalibration and metrology processes associated with manual calibration. This device integrates a precision calibration circuit for adjusting measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring coaxial cable signal accuracy, enabling automatic calibration of the electrical channels of the equipment being calibrated. The original invention's precision calibration circuit uses multiple relays, which must be switched on and off during the calibration process. This requires a high current capacity for the circuit switching relays, resulting in a large calibration unit, high implementation complexity and cost, slow switching, and low efficiency. Furthermore, the lifespan of the high-power relays limits the need for regular replacement of the relay board. Furthermore, the original invention requires a separate power supply for constant-current discharge calibration. This increases the size of the power supply when the discharge current calibration requirement is high. The original invention's constant-current charging method doesn't allow for adjustable output voltage, significantly deviating from actual battery operation. Furthermore, the presence of a current shunt consumes energy, hindering energy conservation. The original invention's coaxiality detection circuit is insensitive to poor contact and cannot specifically identify the source of the problem when multiple probes exhibit poor contact. Summary of the Invention

[0003] In response to the above problems, the present invention proposes an integrated rapid correction device for formation and capacitance separation equipment, which improves the device power supply mode, precision calibration circuit and coaxiality calibration circuit.

[0004] The existing calibration mode circuit for the application of the integrated rapid correction device for formation and capacitance separation equipment includes a host computer, which is connected to a switch via Ethernet; the switch is provided with several device connection ports, and connects a device to be calibrated and several independent working devices via the data line signal of the device connection port; the device to be calibrated is connected to the calibration unit through the voltage and current lines and the wireless signal to calibrate the device; the calibration unit contains a calibration main processor, which receives the wireless signal of the device to be calibrated and is electrically connected to the control end of a multimeter via the Ethernet interface; the calibration main processor includes a precision calibration circuit for adjusting the measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring the accuracy of the coaxial cable signal. The test port of the multimeter is connected to the device to be calibrated via the voltage line and the current line;

[0005] The signal processing port of the calibration main processor of the present invention is connected to an FPGA coprocessor through a parallel bus, the IO signal output end of the FPGA coprocessor is connected to a signal relay board, the signal relay board is connected to a voltage and current connection board, and the voltage and current connection board is connected to the voltage line and current line of the device to be calibrated; the calibration unit is powered by an external power supply.

[0006] The calibration unit of the present invention applies the existing line sequence calibration circuit and improves the precision calibration circuit and the coaxiality calibration circuit. The existing line sequence calibration circuit includes two sets of line sequence detection circuits for connecting test channels; each set of the line sequence detection circuits corresponds to a set of test channels, namely the first test channel and the second test channel; the first test channel and the second test channel are each provided with four voltage connection ports, namely the first voltage positive terminal and the negative terminal, and the second voltage positive terminal and the negative terminal; each set of line sequence detection circuits includes two first resistors, one second resistor, one third resistor, two fourth resistors, a first comparator and a second comparator; the positive voltage input terminal of the first comparator is divided into two paths, one of which is connected in series with the first resistor to form a first voltage connection node, and the other is connected in series with the fourth resistor and then to ground; the negative voltage input terminal of the first comparator is divided into two paths, one of which is connected in series with the third resistor to form a second voltage connection node, and the other is connected in series with the fourth resistor and then to the excitation voltage output terminal of the first comparator; the positive voltage input terminal of the second comparator is divided into two paths, one of which is connected in series with the first resistor to form a third voltage connection node, and the other is connected in series with the fourth resistor and then to ground; the negative voltage input terminal of the second comparator is divided into two paths, one of which is connected in series with the second resistor to form a fourth voltage connection node, and the other is connected in series with the fourth resistor and then to the excitation voltage output terminal of the second comparator;

[0007] The connection nodes of the two groups of line sequence detection circuits are mixed, wherein:

[0008] In the first group of line sequence detection circuits: the first voltage wiring node is electrically connected to the first voltage positive terminal of the second test channel, the second voltage wiring node is electrically connected to the first voltage negative terminal of the first test channel; the third voltage wiring node is electrically connected to the second voltage positive terminal of the second test channel; and the fourth voltage wiring node is electrically connected to the second voltage negative terminal of the first test channel;

[0009] In the second group of line sequence detection circuits: the first voltage wiring node is electrically connected to the first voltage positive end of the first test channel, the second voltage wiring node is electrically connected to the first voltage negative end of the second test channel; the third voltage wiring node is electrically connected to the second voltage positive end of the first test channel; the fourth voltage wiring node is electrically connected to the second voltage negative end of the second test channel; the first voltage wiring node is electrically connected to the fourth voltage wiring node.

[0010] The improved precision calibration circuit of the present invention includes a first calibration channel and a second calibration channel connected to the device to be calibrated and equally dividing the number of cable channels of the device to be calibrated, and precision calibration can be completed by mutual charging and discharging of the channels; the first calibration channel and the second calibration channel are respectively provided with a plurality of negative current contacts, negative voltage contacts, positive voltage contacts and positive current contacts for contacting the probes of the device to be calibrated; the negative current contacts are directly connected to each other; the negative current contacts are connected to their corresponding positive current contacts in sequence through the negative relay, the load resistor and the positive relay; the positive current contacts are divided into two groups, one of which is directly connected to each other, and the other group is also directly connected to each other, and the two groups of positive current contacts are respectively connected in series to the same shunt through fuses; the negative voltage contacts and the positive voltage contacts are respectively connected to the load resistor through the corresponding negative relay and positive relay; the positive relay and the negative relay are both controlled by a signal relay board; the shunt and the load resistor are both connected to a multimeter to reflect the voltage and current;

[0011] When working, the precision calibration circuit can use three modes: constant current charging, constant current discharging, and constant voltage charging and discharging;

[0012] If the constant current charging mode is used, the electrical connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charge and discharge circuit to connect the first calibration channel and the second calibration channel; the second calibration channel serves as a load circuit for charging the first calibration channel, discharging to the first calibration channel, and setting the discharge current to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts constant current charging at the current to be calibrated. After stabilization, the multimeter reads the actual current value, completing one stage of charging current calibration;

[0013] If the constant current discharge mode is used, the current connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charge-discharge circuit to connect the first calibration channel and the second calibration channel. The second calibration channel is charged through the charge-discharge circuit, and the electric energy generated by the charging is used to discharge the first calibration channel. The charging current of the second calibration channel is set to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts to perform constant current discharge according to the current to be calibrated; after stabilization, the multimeter reads the actual current value, completing one stage of discharge current calibration;

[0014] If it is the constant voltage charge and discharge mode, all positive relays and negative relays are initially in the disconnected state; when calibrating the first calibration channel, the positive relay and its corresponding negative relay are closed, and form a constant voltage calibration loop with the load resistor. After the first calibration channel starts the constant voltage charge and discharge calibration, the voltage reading across the load resistor measured by the multimeter is read, completing one stage of voltage calibration.

[0015] More specifically, the improved coaxiality calibration circuit of the present invention includes a plurality of coaxiality detection circuits corresponding one-to-one to the probes of the device to be calibrated, the coaxiality detection circuit includes a test resistor and a tilt detection ring for checking the tilt of the current and voltage probes, the tilt detection ring is coaxially arranged at the detection probe, and includes an outer ring and an inner ring, the outer ring is coaxially sleeved on the outside of the inner ring, and a uniform annular gap is left between the inner ring and the outer ring; a spring that can be stretched up and down is provided under the outer ring, so that the outer ring is slightly higher than the inner ring in the initial state; the inner ring of the tilt detection ring is connected to the negative pole of the same driving power supply, and the inner ring is connected to the upper end of the inner ring. A detection probe contact point is provided on the surface for contacting and connecting with the detection probe; the outer rings of the tilt detection ring are respectively connected to a coaxial relay that can be turned on and off, and the coaxial relays are connected to the same test resistor; the test resistor is connected to the positive pole of the driving power supply, and the detection end of the wire is left as the positive pole detection point; if the current and voltage probes are offset and contact the outer ring first and then the inner ring, the outer ring can detect the excitation voltage; the coaxial relays are initially in the disconnected state. When detecting the contact state of a specific probe, the relay of the corresponding coaxiality detection circuit can be closed, and the voltage value of the positive pole monitoring point is collected to determine whether the probe is offset.

[0016] The calibration mode of the calibration fixture of the present invention is that the upper computer sends all calibration parameters (channel number, voltage, current, charge and discharge, gear parameters, delayed shutdown parameters, etc.) to the lower computer, which then sends the channel and selection instructions to the calibration fixture. After starting calibration measurement, the lower computer reads the multimeter's measurement value Vh (unit: V). The lower computer calculates the Ks, Bs, Kr, and Br values ​​based on the Vs, Vr, and Vh values ​​and directly records the calibration values. After the upper computer sends the parameters, it does not participate in the subsequent calibration measurement, but only displays data prompts.

[0017] The beneficial effects of the present invention are:

[0018] 1) The calibration unit of the present invention is directly connected to an external power supply through a voltage and current connection board, eliminating the design of an internal independent power supply, which facilitates miniaturization and large-scale application of the equipment.

[0019] 2) The precision calibration circuit of the present invention abandons the design of a power relay and directly divides the electrical channel of the device to be calibrated into two equal parts. The charging calibration of the precision calibration circuit of the original invention relies on short-circuit charging, and the output voltage is small and cannot be specified. The present invention completes the calibration through mutual charging and discharging between channels, so that the charging and discharging current is only limited by the current-carrying capacity of the cable, which greatly simplifies the charging and discharging circuit and reduces the size of the calibration unit.

[0020] 3) The constant current charging mode of the precision calibration circuit of the present invention absorbs energy by discharging the corresponding channel, thereby improving calibration energy recovery and avoiding energy waste, while at the same time being able to specify the level of the charging output voltage; the energy of the constant current discharge mode of the precision calibration circuit is provided by charging the corresponding channel, and there is no need to install an additional discharge power supply on the calibration unit.

[0021] 4) The precision calibration circuit of the present invention can realize multi-channel parallel calibration, and the calibration speed is greatly improved.

[0022] 5) The coaxiality calibration circuit includes an outer ring with a telescopic spring mounted on a coaxial inner ring, and independent relays corresponding to the detection probes. This improves the sensitivity of the detection probe offset and can quickly distinguish the specific location of the probe with poor contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a block diagram of an integrated rapid correction device for formation and volume separation equipment;

[0024] Figure 2 is a structural diagram of the precision calibration circuit of the present invention;

[0025] Figure 3 It is a structural diagram of an existing line sequence calibration circuit applied by the present invention;

[0026] Figure 4 is a structural diagram of a coaxiality calibration circuit of the present invention;

[0027] Figure 5 : is a top view of the coaxiality calibration circuit of the present invention DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] A three-in-one rapid calibration device for formation and volume separation equipment.

[0030] The existing calibration mode circuit for the application of the integrated rapid correction device for formation and capacitance separation equipment includes a host computer 1, which is connected to a switch 2 via Ethernet; the switch 2 is provided with several device connection ports, and connects a device to be calibrated 4 and several independent working devices 5 via the data line signal of the device connection port; the device to be calibrated 4 is connected to the calibration unit 3 for device calibration through the voltage and current lines and wireless signals; the calibration unit 3 contains a calibration main processor 31, which receives the wireless signal of the device to be calibrated and is electrically connected to the control end of a multimeter 35 via the Ethernet interface; the calibration main processor 31 includes a precision calibration circuit for adjusting the measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring the accuracy of the coaxial cable signal. The test port of the multimeter is connected to the device to be calibrated 4 via the voltage line and the current line;

[0031] The signal processing port of the calibration main processor 31 of the present invention is connected to an FPGA coprocessor 32 through a parallel bus, the IO signal output end of the FPGA coprocessor 32 is connected to a signal relay board 33, the signal relay board 33 is connected to a voltage and current connection board 36, and the voltage and current connection board 36 is connected to the voltage line and current line of the device to be calibrated; the calibration unit is powered by an external power supply.

[0032] The calibration unit of the present invention applies the existing line sequence calibration circuit and improves the precision calibration circuit and the coaxiality calibration circuit. The existing line sequence calibration circuit includes two groups of line sequence detection circuits for connecting test channels, namely the first group of line sequence detection circuit A and the second group of line sequence detection circuit B; each set of the line sequence detection circuit corresponds to a set of test channels 6, and the test channels are respectively the first test channel 6A and the second test channel 6B, and the first test channel 6A and the second test channel 6B are both provided with four voltage connection ports, namely the first voltage positive and negative terminals (VB+, VB-) and the second voltage positive and negative terminals (VI+, VI-); each group of line sequence detection circuits includes two first resistors R1, one second resistor R2, one third resistor R3, two fourth resistors R4, a first comparator 321 and a second comparator 322; the voltage input positive terminal of the first comparator 321 is divided into two paths, one of which is connected in series with the first resistor R1 to form a first voltage connection node a, and the other is connected in series with the fourth resistor R3. The negative voltage input terminal of the first comparator 321 is divided into two paths, one of which is connected in series with the third resistor R3 to form a second voltage connection node b, and the other is connected in series with the fourth resistor R4 to the excitation voltage output terminal of the first comparator 321, wherein the voltages output by the two groups of excitation voltage output terminals of the first comparators are VB1 and VB2; the positive voltage input terminal of the second comparator 322 is divided into two paths, one of which is connected in series with the first resistor R1 to form a third voltage connection node c, and the other is connected in series with the fourth resistor R4 to ground; the negative voltage input terminal of the second comparator 322 is divided into two paths, one of which is connected in series with the second resistor R2 to form a fourth voltage connection node d, and the other is connected in series with the fourth resistor R4 to the excitation voltage output terminal of the second comparator 322, wherein the voltages output by the two groups of excitation voltage output terminals of the second comparators are VI1 and VI2;

[0033] The connection nodes of the two groups of line sequence detection circuits are mixed, wherein:

[0034] In the first group of line sequence detection circuits: the first voltage wiring node is electrically connected to the first voltage positive terminal of the second test channel, the second voltage wiring node is electrically connected to the first voltage negative terminal of the first test channel; the third voltage wiring node is electrically connected to the second voltage positive terminal of the second test channel; and the fourth voltage wiring node is electrically connected to the second voltage negative terminal of the first test channel;

[0035] In the line sequence detection circuit of the second group: the first voltage wiring node is electrically connected to the first voltage positive end of the first test channel, the second voltage wiring node is electrically connected to the first voltage negative end of the second test channel; the third voltage wiring node is electrically connected to the second voltage positive end of the first test channel; the fourth voltage wiring node is electrically connected to the second voltage negative end of the second test channel; the first voltage wiring node is electrically connected to the fourth voltage wiring node. The line sequence detection is that the lower computer gives an excitation voltage to the line sequence calibration circuit, and gives an excitation voltage to the current line and the voltage line separately. The excitation voltage sampled by the lower computer is within a reasonable range, indicating that the line sequence of the current line or the voltage line is correct. The line sequence error types include (current line and voltage line are reversed, current lines are mixed, voltage lines are mixed, and current line and voltage line are not connected). If the line sequence is wrong, the excitation voltage sampled by the lower computer is not within the range.

[0036] The improved precision calibration circuit of the present invention includes a first calibration channel and a second calibration channel connected to the device to be calibrated and equally dividing the number of cable channels of the device to be calibrated, and the precision calibration can be completed by charging and discharging the channels with each other; the first calibration channel and the second calibration channel are respectively provided with a plurality of negative current contacts 311, negative voltage contacts 312, positive voltage contacts 314 and positive current contacts 315 for contacting the probes of the device to be calibrated; the negative current contacts 311 are directly connected to each other; the negative current contacts are sequentially connected through the negative relay 313, the load resistor 316 and the positive relay 319 The positive current contacts 315 are connected to their corresponding positive current contacts. The positive current contacts are divided into two groups, one of which is directly connected to each other, and the other is also directly connected to each other. The two groups of positive current contacts are connected in series to the same shunt 318 via a fuse 317. The negative voltage contact 314 and the positive voltage contact 315 are connected to a load resistor 316 via a corresponding negative relay 313 and a positive relay 319, respectively. The positive relay and the negative relay are both controlled by a signal relay board 33. The shunt 318 and the load resistor 316 are both connected to a multimeter to measure the voltage and current.

[0037] When working, the precision calibration circuit can use three modes: constant current charging, constant current discharging, and constant voltage charging and discharging;

[0038] In constant current charging mode, the electrical connection formed by the two sets of positive current contacts, I16+ and I1+, and their corresponding negative current contacts, I16- and I1-, is used as a charge and discharge circuit to connect the first calibration channel and the second calibration channel. The working steps include:

[0039] 1. The second calibration channel acts as a load circuit for charging the first calibration channel, discharging to the first calibration channel, and setting the discharge current to be greater than the maximum current generated during charging calibration of the first calibration channel;

[0040] 2. The first calibration channel starts constant current charging according to the current to be calibrated;

[0041] 3. After stabilization, use the multimeter to read the actual current value to complete one stage of charging current calibration;

[0042] In constant current discharge mode, the current connection formed between two sets of positive current contacts, I16+ and I1+, and their corresponding negative current contacts, I16- and I1-, is used as a charge-discharge circuit to connect the first calibration channel and the second calibration channel. The second calibration channel is charged through the charge-discharge circuit, and the energy generated by the charging is used to discharge the first calibration channel. The working steps include:

[0043] 1. The charging current of the second calibration channel is set to be greater than the maximum current generated during the charging calibration of the first calibration channel;

[0044] 2. The first calibration channel starts constant current discharge according to the current to be calibrated;

[0045] 3. After stabilization, use the multimeter to read the actual current value to complete one stage of discharge current calibration;

[0046] If the constant voltage charge and discharge mode is used, all positive and negative relays are initially disconnected. The working steps include:

[0047] 1. When calibrating the first calibration channel, the positive relay K1-2 and its corresponding negative relay K1-1 are closed, and together with the load resistor 316 form a constant voltage calibration loop;

[0048] 2. After starting constant voltage charge and discharge calibration on the first channel, read the voltage reading across the load resistor measured by the multimeter to complete one stage of voltage calibration.

[0049] The improved coaxiality calibration circuit of the present invention includes a plurality of coaxiality detection circuits corresponding one to one with the probes of the device to be calibrated, the coaxiality detection circuit includes a test resistor 335 and a tilt detection ring for checking the tilt of the current and voltage probes, the tilt detection ring is coaxially arranged at the detection probe 331, and includes an outer ring 332 and an inner ring 333, the outer ring 332 is coaxially sleeved on the outside of the inner ring 333, and a uniform annular gap is left between the inner ring 333 and the outer ring 332; a spring 337 that can be extended and retracted up and down is provided under the outer ring, so that the outer ring is slightly higher than the inner ring in the initial state; the inner ring of the tilt detection ring is connected to the negative pole of the same driving power supply 336, and is connected to the upper end of the inner ring. A detection probe contact point 334 is provided on the surface for contacting and connecting with the detection probe 331; the outer rings of the tilt detection ring are respectively connected to a coaxial relay 334 that can be turned on and off, and the coaxial relays are connected to the same test resistor 335; the test resistor is connected to the positive pole of the driving power supply 336, and the wire has a detection end as the positive detection point C; if the current and voltage probes are offset and contact the outer ring first and then the inner ring, the outer ring can detect the excitation voltage; the coaxial relays 334 are initially in the disconnected state. When detecting the contact state of a specific probe, the coaxial relay 334 corresponding to the coaxiality detection circuit can be turned off, and the voltage value of the positive monitoring point C is collected to determine whether the probe is offset.

[0050] The calibration mode of the calibration fixture of the present invention is that the upper computer sends all calibration parameters (channel number, voltage, current, charge and discharge, gear parameters, delayed shutdown parameters, etc.) to the lower computer, which then sends the channel and selection instructions to the calibration fixture. After starting calibration measurement, the lower computer reads the multimeter's measurement value Vh (unit: V). The lower computer calculates the Ks, Bs, Kr, and Br values ​​based on the Vs, Vr, and Vh values ​​and directly records the calibration values. After the upper computer sends the parameters, it does not participate in the subsequent calibration measurement, but only displays data prompts.

[0051]

[0052]

[0053] The beneficial effects of the present invention are:

[0054] 1) The calibration unit of the present invention is directly connected to an external power supply through a voltage and current connection board, eliminating the design of an internal independent power supply, which facilitates miniaturization and large-scale application of the equipment.

[0055] 2) The precision calibration circuit of the present invention abandons the design of a power relay and directly divides the electrical channel of the device to be calibrated into two equal parts. The charging calibration of the precision calibration circuit of the original invention relies on short-circuit charging, and the output voltage is small and cannot be specified. The present invention completes the calibration through mutual charging and discharging between channels, so that the charging and discharging current is only limited by the current-carrying capacity of the cable, which greatly simplifies the charging and discharging circuit and reduces the size of the calibration unit.

[0056] 3) The constant current charging mode of the precision calibration circuit of the present invention absorbs energy by discharging the corresponding channel, thereby improving calibration energy recovery and avoiding energy waste, while at the same time being able to specify the level of the charging output voltage; the energy of the constant current discharge mode of the precision calibration circuit is provided by charging the corresponding channel, and there is no need to install an additional discharge power supply on the calibration unit.

[0057] 4) The precision calibration circuit of the present invention can realize multi-channel parallel calibration, and the calibration speed is greatly improved.

[0058] 5) The coaxiality calibration circuit includes an outer ring with a telescopic spring mounted on a coaxial inner ring, and independent relays corresponding to the detection probes. This improves the sensitivity of the detection probe offset and can quickly distinguish the specific location of the probe with poor contact.

Claims

1. An integrated rapid calibration device for formation and capacitance separation equipment, wherein the existing calibration mode circuit used in the device comprises a host computer connected to a switch via Ethernet; the switch is provided with several device connection ports, and a device to be calibrated is connected to several independent working devices via data line signals of the device connection ports; the device to be calibrated is connected to a calibration unit having a calibration function via voltage and current lines and wireless signals; the calibration unit comprises a calibration main processor, which receives wireless signals from the device to be calibrated and is electrically connected to a control terminal of a multimeter via an Ethernet interface; the calibration main processor comprises an accuracy calibration circuit for adjusting measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring the accuracy of coaxial cable signals; the test port of the multimeter is connected to the device to be calibrated via voltage and current lines; and the device is characterized in that: The signal processing port of the calibration main processor is connected to an FPGA coprocessor via a parallel bus, the IO signal output end of the FPGA coprocessor is connected to a signal relay board, the signal relay board is connected to a voltage and current connection board, and the voltage and current connection board is connected to the voltage line and current line of the device to be calibrated; the calibration unit is powered by an external power supply; The precision calibration circuit includes a first calibration channel and a second calibration channel which are connected to the device to be calibrated and have equal number of cable channels of the device to be calibrated, and precision calibration can be completed by mutual charging and discharging of the channels; the first calibration channel and the second calibration channel are respectively provided with a plurality of negative current contacts, negative voltage contacts, positive voltage contacts and positive current contacts for contacting the probes of the device to be calibrated; the negative current contacts are directly connected to each other; the negative current contacts are connected to their corresponding positive current contacts in sequence through the negative relay, the load resistor and the positive relay; the positive current contacts are divided into two groups, one of which is directly connected to each other, and the other group is also directly connected to each other, and the two groups of positive current contacts are respectively connected in series to the same shunt through a fuse; the negative voltage contact and the positive voltage contact are respectively connected to the load resistor through the corresponding negative relay and the positive relay; the positive relay and the negative relay are both controlled by a signal relay board; the shunt and the load resistor are both connected to a multimeter to reflect the voltage and current; The precision calibration circuit can be used in three modes: constant current charging, constant current discharging, and constant voltage charging and discharging; If the constant current charging mode is used, the electrical connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charge and discharge circuit to connect the first calibration channel and the second calibration channel; the second calibration channel serves as a load circuit for charging the first calibration channel, discharging to the first calibration channel, and setting the discharge current to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts constant current charging at the current to be calibrated. After stabilization, the multimeter reads the actual current value, completing one stage of charging current calibration; If the constant current discharge mode is used, the electrical connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charge-discharge circuit to connect the first calibration channel and the second calibration channel. The second calibration channel is charged through the charge-discharge circuit, and the electrical energy generated by the charging is used to discharge the first calibration channel. The charging current of the second calibration channel is set to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts to perform constant current discharge according to the current to be calibrated; after stabilization, the multimeter reads the actual current value, completing one stage of discharge current calibration; If it is a constant voltage charge and discharge mode, all positive relays and negative relays are initially in the disconnected state; when calibrating the first calibration channel, the positive relay and its corresponding negative relay are closed, and form a constant voltage calibration loop with the load resistor. After the first calibration channel starts the constant voltage charge and discharge calibration, the voltage reading across the load resistor measured by the multimeter is read to complete one stage of voltage calibration.

2. The integrated rapid calibration device for formation and volume separation equipment according to claim 1, characterized in that: The coaxiality calibration circuit includes a plurality of coaxiality detection circuits corresponding to the probes of the device to be calibrated one by one, and the coaxiality detection circuit includes a test resistor and a tilt detection ring for checking the tilt of the current and voltage probes. The tilt detection ring is coaxially arranged at the detection probe, and includes an outer ring and an inner ring. The outer ring is coaxially sleeved outside the inner ring, and a uniform annular gap is left between the inner ring and the outer ring; a spring that can be stretched up and down is provided under the outer ring, so that the outer ring is higher than the inner ring in the initial state; the inner ring of the tilt detection ring is connected to the negative pole of the same driving power supply, and a detection The probe contact point is used to contact and connect with the detection probe; the outer rings of the tilt detection ring are respectively connected to a coaxial relay that can be turned on and off, and the coaxial relays are connected to the same test resistor; the test resistor is connected to the positive pole of the driving power supply, and the detection end of the wire is left as the positive pole detection point; if the current and voltage probes are offset and contact the outer ring first and then the inner ring, the outer ring can detect the excitation voltage; the coaxial relays are initially in the disconnected state. When detecting a specific probe contact state, the coaxial relay of the corresponding coaxiality detection circuit can be turned off, and the voltage value of the positive pole detection point is collected to determine whether the probe is offset.

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