CN214174873U - Device for generating high-precision analog signal - Google Patents
Device for generating high-precision analog signal Download PDFInfo
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- CN214174873U CN214174873U CN202120259048.XU CN202120259048U CN214174873U CN 214174873 U CN214174873 U CN 214174873U CN 202120259048 U CN202120259048 U CN 202120259048U CN 214174873 U CN214174873 U CN 214174873U
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Abstract
The utility model relates to the technical field of analog signals, and discloses a device for generating high-precision analog signals, which comprises a power module, wherein the power module respectively provides power for a main control module, an AD conversion module, a self-checking module, a high-precision resistance module and a communication module; the communication module is connected with the main control module and is used as a data conversion transmission channel of the upper computer and the high-precision analog signal device; the main control module is connected with the high-precision resistance module, and the high-precision resistance module generates a voltage with specified precision to output; the high-precision resistance module is connected with the AD conversion module, and the AD conversion module is used for converting the voltage output by the high-precision resistance module into a digital signal; the self-checking circuit is respectively connected with the high-precision resistance module and the AD conversion circuit, and the self-checking module is used for carrying out multi-point voltage detection on the high-precision resistance circuit connected with the specified voltage; the utility model has the characteristics of output signal precision is high, and the PC is controllable.
Description
Technical Field
The utility model relates to an analog signal technical field specifically is a produce high accuracy analog signal device.
Background
With the improvement of the intelligent degree, various analog signal sources are required to realize continuous and infinite change in the control process, and the analog signal source is a requirement for intelligent control; and sending the message through an upper computer interface, sending the message to high-precision analog signal generator equipment through a communication interface, receiving and analyzing the message by the equipment, controlling a circuit according to the message requirement, and generating a corresponding analog signal to output.
The high-precision analog signal equipment outputs a high-precision resistance value signal, and the precision of the output signal is adjusted according to the high-precision resistance step and precision by injecting corresponding voltage into two ends of the high-precision resistance value.
The existing analog signal output equipment has the following defects: the output assignment is low, the introduced error factors are many, the output ripple is large, and the output precision is limited; the defects can not meet the requirements of wide assignment range and high precision requirement, and the output signal parameters and an upper computer system can not realize remote control.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to solve the defects of the prior art, the utility model provides a method for generating high-precision analog signals, which effectively solves the defects of the prior analog signal such as output precision and assignment problem, and simultaneously adds the functions of back mining and calibration on software and hardware, so that the input and output form a closed loop system, and the precision problem of output is improved to the maximum extent by combining the software and the hardware; the problems that the analog output function board card is universal, free combination cannot be carried out, output of various signals cannot be met, and remote control cannot be achieved are solved.
The utility model provides a produce high accuracy analog signal device, the technical scheme of its solution is: the utility model provides a device for generating high-precision analog signals, which is characterized by comprising a main control module, an AD conversion module, a self-checking module, a high-precision resistance module, a power supply module and a communication module;
the high-precision analog signal device and the upper computer are communicated with each other in a message form;
the upper computer is used for sending a signal control command, storing the acquired data, recording a running track and adaptively adjusting output gain;
the self-checking module also comprises a multi-channel analog switch;
the power supply module respectively supplies power to the main control module, the AD conversion module, the self-checking module, the high-precision resistance module and the communication module; the communication module is connected with the main control module and is used as a data conversion transmission channel of the upper computer and the high-precision analog signal device; the main control module is connected with the high-precision resistance module, and the high-precision resistance module generates a voltage with specified precision to output; the high-precision resistance module is connected with the AD conversion module and used for converting the voltage output by the high-precision resistance module into a digital signal; after the self-checking module is respectively connected with the high-precision resistance module and the AD conversion circuit, the self-checking module carries out multi-point voltage detection on the high-precision resistance circuit connected with the specified voltage; the main control circuit is connected with the self-checking module to narrow the fault detection range.
Preferably, the high-precision resistance module comprises a resistor R1-R (n +1), a protective tube F1, a relay Q1-Q (n +3) and a diode D1, wherein one end of the resistor R1 is grounded, the other end of the resistor R1 is connected with a resistor R2, a resistor R1 is connected with the 1 st pin and the 4 th pin of the relay Q-1 in parallel, the 2 nd pin of Q-1 is connected with a power supply, the 3 rd pin of Q-1 is connected with a control end JDQ1, the resistor R2 is connected with the 1 st pin and the 4 th pin of the relay Q-2 in parallel, the 2 nd pin of Q-2 is connected with the power supply, the 3 rd pin of Q-2 is connected with a control end JDQ2, the other end of the resistor R2 is connected with a resistor R3, the R3 is connected with the 1 st pin and the 4 th pin of the relay Q-3 in parallel, the 2 nd pin of Q-3 is connected with the power supply, the 3 rd pin of Q3, the other end of Q3 is connected, the 2 nd pin of Q-4 is connected with power supply, the 3 rd pin of Q-4 is connected with control end JDQ4, the other end of R4 is connected with resistor R5, R5 is connected with the 1 st pin and 4 th pin of relay Q-5 in parallel, the 2 nd pin of Q-5 is connected with power supply, the 3 rd pin of Q-5 is connected with control end JDQ5, the other end of R5 is connected with R6 and detection point CHECK _ AD1, CHECK _ AD1 is connected with multi-channel analog switch, resistor R6 is connected with the 1 st pin and 4 th pin of Q-6 in parallel, the 2 nd pin of Q-6 is connected with power supply, the 3 rd pin of Q-6 is connected with control end JDQ6, R15 is connected with the 1 st pin and 4 th pin of relay Q-15 in parallel, the 2 nd pin of Q-15 is connected with power supply, the 3 rd pin of Q-15 is connected with control end JDQ15, R15 is connected with the other end of R16 and detection point CHEK _ AD2, CHECK _ 2 is connected with multi-channel ECK _ AD switch and R16 and parallel connection with relay Q-1 and R-4 pin, the 2 nd pin of Q-16 is connected with a power supply, the 3 rd pin of Q-16 is connected with a control terminal JDQ16, the other end of R16 is connected with R17, CHECK _ AD3 and the multi-channel analog switch, R26 is connected with the 1 st pin and the 4 th pin of the relay Q-26 in parallel, the 2 nd pin of Q-26 is connected with the power supply, the 3 rd pin of Q-26 is connected with a control terminal JDQ26, the other end of R26 is connected with R27, R27 is connected with the 1 st pin and the 4 th pin of the relay Q-27 in parallel, the 2 nd pin of Q-27 is connected with the power supply, the 3 rd pin of Q-27 is connected with a control terminal JDQ27, the other end of R27 is connected with R28, R28 is connected with the 1 st pin and the 4 th pin of the relay Q-28 in parallel, the 2 nd pin of Q-28 is connected with the power supply, the 3 rd pin of Q-28 is connected with a control terminal JDQ28 9, the other end of R2 is connected with the other end of R8 and the detection point CHK _ AD4, the multi-channel ECK _ AD4 is connected with the on-off and the relay Q-1, the relay Q-1 and the relay Q-26 in parallel, the 2 nd pin of Q-29 is connected with power supply, the 3 rd pin of Q-28 is connected with control end JDQ29, the other end of R29 is connected with Rn and detection point CHECK _ ADm, CHECK _ ADm and multi-channel analog switch, Rn is connected with 1 st pin and 4 th pin of relay Q-n IN parallel, the 2 nd pin of Q-n is connected with power supply, the 3 rd pin of Q-n is connected with control end JDQn, Rn is connected with R (n +1), R (n +1) is connected with 1 st pin and 4 th pin of relay Q- (n +1) IN parallel, the 2 nd pin of Q- (n +1) is connected with power supply, the 3 rd pin of Q- (n +1) is connected with control end JDQ (n +1), the other end of fuse F1, the other end of F1 is connected with the 1 st pin of Q- (n +2) and the 1 st pin of Q- (n +3), the 4 th pin of Q- (n +2) is connected with power supply, the 2 nd pin of VR 2 is connected with power supply, the 3 rd pin of Q- (n +2) connects control end JDQ (n +2), the 2 nd pin of Q- (n +3) connects the power, the 3 rd pin of Q- (n +3) connects control end JDQ (n +3), the 4 th pin of Q- (n +3) connects diode D1 negative terminal, the positive terminal VCC _ IN of D1, high accuracy analog signal output end is got IN the intermediate position of high accuracy resistance module resistance circuit.
Compared with the prior art, the utility model discloses possess following beneficial effect:
1. the utility model has the advantages of high output signal precision, less clutter and good stability;
2. the utility model can change the maximum output voltage of the high-precision analog signal output end only by changing the voltage of the high-precision power supply, and has wide threshold range;
3. through the control of an upper computer, the high-precision analog signal output end can output a high-precision analog signal with almost any waveform;
4. the high-precision resistance module controlled by the relay is adopted, so that the precision of the circuit is hardly influenced after the relay is electrically shocked and conducted;
5. the utility model can adopt a plurality of devices to work together under the control of the upper computer, and the connection mode is either series connection or parallel connection, which can provide signals of different voltages;
6. the utility model discloses a high accuracy resistance module can the split combination, and the convenience is used in the applied scene of difference.
Drawings
FIG. 1 is a connection diagram of the present invention;
FIG. 2 is a general structure diagram of the present invention;
FIG. 3 is an equivalent diagram of the high-precision resistor module of the present invention;
fig. 4 is the circuit diagram of the high-precision resistor module of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 3 to 4. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The invention relates to high-precision analog signal output, which is characterized by timely real-time performance, convenient operation and wide selectivity; the upper computer in the system is used for sending a signal control command and recording the running track of the system; the target signal path generates signals of corresponding types according to the signal type information;
the plug connector needs to be connected with an external device;
and the case is used for placing a plurality of signal devices and is connected with an external structural part.
The signal instruction is a message protocol for communication between the upper computer and the signal equipment, and the message comprises signal target information of ID information of a signal target, a signal receiving type to be generated and a signal output type.
The upper computer is a PC, and a human-computer interaction interface is designed on the PC and used for user operation and checking query data records; the upper computer is used for generating a program control quantity instruction, and the program control quantity instruction comprises a signal type, a matching coefficient, a reference signal and the like; the program control quantity instruction comprises signal target information, signal type information and data information needing to be uploaded.
The operator selects parameter configuration for the man-machine interface, the message forms data packet down-transmission signal generating equipment, and the microprocessor in the equipment board card receives the message, analyzes the message according to a communication protocol and executes corresponding operation according to the message.
The specific process comprises the following steps: operating keys corresponding to a human-computer interface, sending a message by an upper computer through a communication port, receiving a data packet message sent by the upper computer by equipment, starting to judge an ID by a board card main control microprocessor, returning error information to the upper computer by a lower computer if the ID is wrong, carrying out corresponding processing by a PC (personal computer) according to the received information, sending the message again, reading message information required by the upper computer from a circuit by the lower computer when the ID is correct, uploading the message information to the PC, processing the message by a signal processing board card in signal equipment according to a communication protocol, analyzing the message by the microprocessor, making corresponding response output, finally finishing analog signal output, and finishing the processing.
The signal path comprises a main control module, an AD conversion module, a self-checking module, a high-precision resistance module, a power supply module and a communication module; the power module is a high-precision power supply.
The working principle is that the high-precision analog signal generating device can perform self-checking after being started, the main control module closes 5V voltage to supply power to the high-precision resistor module, each relay is closed and disconnected through the main control module, the collected voltage of each detection point is simultaneously transmitted to the multi-channel analog switch circuit, the collected voltage is transmitted to the AD conversion circuit to be converted one by one, the voltage reaches the main control module to be processed, the voltage between the detection points is judged to be compared with a normal value, the obtained data is finally uploaded to an upper computer, and when the detection circuit is normal, the circuit starts to work.
The high-precision analog signal generating device firstly performs a self-checking step after being electrified and started, and provides a fixed 5V voltage for the high-precision resistor module, when the high-precision resistor module is normal, the voltage acquired by the self-checking points in the circuit is fixed, so that the main control module can roughly judge which relays are abnormal in positions only by judging whether the voltages of the respective detection and acquisition points are normal, and the relays can be accurately judged if the self-checking points are dense.
The position and number of collection points of the high-precision resistor module can be changed, and are not limited to only a few embodiments.
The upper computer sends data to the high-precision analog signal generating device through the communication module, the communication module in the high-precision analog signal generating device converts the data signals into signals which can be identified by the main control module, the main control module drives the corresponding relays to be closed through an algorithm after processing the information, so that the equivalent resistance R1 and the equivalent resistance R2 in the high-precision resistance module in the graph 3 are in proportion, a high-precision voltage value required by the upper computer is output at the output end of the high-precision analog signal, the high-precision voltage generated by the high-precision resistance circuit is sent to the main control module again through the AD conversion circuit for comparison processing, if the voltage values are consistent, a command of resetting the upper computer is waited, if the voltage values have errors, the main control module controls the corresponding relays to readjust the output voltage values until the voltage values are consistent with the set voltage values.
The output threshold range of the high-precision analog signal output end can be changed by replacing power modules with different voltages.
As can be seen from fig. 3, the high-precision analog signal output terminal is located at the middle position of the high-precision resistor module resistor circuit, and if the number of the resistors is odd, the high-precision analog signal output terminal may be connected to one end of the middle resistor of the high-precision resistor module resistor circuit, and any one of the two ends is feasible.
The host computer passes through the net twine connection, and the host computer can be adjusted with the distance that produces high accuracy analog signal device, possesses remote communication's characteristics, can know simultaneously that the host computer can control a plurality of devices that produce high accuracy analog signal through flaring circuit to constitute the analog signal of the high accuracy of more kinds of different voltages.
In this embodiment, the AD conversion module employs an ADs1115 chip; the communication module adopts a sn65hvd230 chip 230, which is a CAN chip; a CD4051 chip is adopted by a multi-channel analog switch in the self-checking module; the main control module adopts STM32F103 series chips.
In the second embodiment, based on the first embodiment, the input signal 1 is a control signal bus JDQn, and 32 paths of relay control signals are provided to control the pull-in function of the JDQ1-JDQ32 relays; the input signal 2 is a power supply signal VCC _ IN end, is provided with a 5V direct current voltage signal, loads voltage on a resistor, and tests whether a relay on a channel fails; the input signal 3 is an assigned adjustable power supply, VR + IN, is the maximum assignment of the output analog signal, and the maximum assignment range of the output analog signal is changed by changing the voltage of the power supply; VRGND is the negative end of analog signal, it connects resistance R1, the 1 st pin, 4 th pin and R1 of Q-1 are connected in parallel, the 2 nd pin of Q-1 connects VDD50, the 3 rd pin of Q-1 connects control end JDQ1, the other end of R1 connects resistance R2, R2 and the 1 st, 4 th pin of relay Q-2 in parallel, the 2 nd pin of Q-2 connects power VDD50, the 3 rd pin of Q-2 connects control end JDQ2, the other end of R2 connects resistance R3, R3 and relay Q-3 in parallel, the 2 nd pin of Q-3 connects power VDD50, the 3 rd pin of Q-3 connects control end JDQ3, the other end of R3 connects resistance R4, R4 and relay Q-4 in parallel, the 2 nd pin of Q-4 connects power 50, the 3 rd pin of Q-4 connects control end JDQ4, the other end of R4 connects resistance R4 and R599 of relay Q-3 in parallel, the other end of the 3 rd pin of Q-5 is connected with the control end JDQ5, the other end of R5 is connected with the R6 and the detection point CHECK _ AD1, CHECK _ AD1 is connected with the first channel pin of the multi-channel analog switch, R6 is connected with Q-6 in parallel, the 2 nd pin of Q-6 is connected with the power supply VDD50, the 3 rd pin of Q-6 is connected with the control end JDQ6, R15 is connected with the relay Q-15 in parallel, the 2 nd pin of Q-15 is connected with the power supply VDD50, the 3 rd pin of Q-15 is connected with the control end JDQ15, the other end of R15 is connected with the R16 and the detection point CHECK _ AD2, CHECK _ AD2 is connected with the second channel pin of the multi-channel analog switch, R16 is connected with the relay Q-16 in parallel, the 2 nd pin of Q-16 is connected with the power supply VDD50, the 3 rd pin of Q-16 is connected with the control end Q16, the other end of R16 is connected with the other end of R17, the other end JDQ26 is connected with the parallel connection with the control end Q-26, the Q-26 is connected with the control end VDD-9 and Q-26, the other end of R26 is connected with R27, R27 is connected with a relay Q-27 IN parallel, the 2 nd pin of Q-27 is connected with a power supply VDD50, the 3 rd pin of Q-27 is connected with a control end JDQ27, the other end of R27 is connected with R28, R28 is connected with the relay Q-28 IN parallel, the 2 nd pin of Q-28 is connected with a power supply VDD50, the 3 rd pin of Q-28 is connected with a control end JDQ28, the other end of R28 is connected with R29 and a detection point CHECK _ AD4, R29 is connected with the relay Q-29 IN parallel, the 2 nd pin of Q-29 is connected with a power supply 50, the 3 rd pin of Q-28 is connected with a control end JDQ29, the other end of R9 is connected with R30, R30 is connected with the relay Q-30 IN parallel, the 2 nd pin of Q-30 is connected with a power supply VDD50, the 3 rd pin of Q30, the 3 rd pin of Q-30 is connected with a control end JDQ30, the other end of R30 is connected with one end of a fuse F1, the other end of F58 is connected with the Q1 st pin VR 1 st pin of Q31, Q-32 is connected with the Q-32 + VDD 31, Q-32, VDD-32, the 3 rd pin of the Q-31 is connected with the control terminal JDQ31, the 2 nd pin of the Q-32 is connected with the power supply VDD50, the 3 rd pin of the Q-32 is connected with the negative terminal of the diode D1, and the positive terminal of the diode D1 is connected with VCC _ IN.
In the embodiment, the resistance value of the first resistor R1 of the high-precision resistor module is 1 Ω, the resistance value of the 30 th resistor R30 is 100M Ω, and the resistance values from the resistor R1 to the resistor R30 are in an increasing relationship, and it is observed that increasing is not uniform, and more like increasing by exponential type, but this does not indicate that the resistors of the high-precision resistor module must be arranged after changing values, and the high-precision resistor module aims to realize a set high-precision analog value in cooperation with an upper computer, so the resistance values can be arbitrarily matched, but it must be stated that the matching of the resistors must meet the requirements of the high-precision resistor module and output the high-precision analog value required by the upper computer; also, the number of resistors is 30 in the present embodiment, but for the present invention, the number of resistors in the high-precision resistor module is not fixed, and is related to the output voltage step according to the adjustable range of the output voltage.
The high-precision resistor is generally a metal film resistor and can be other types of high-precision resistors; the precision of the high-precision power supply is less than 50mV, and a power supply with higher precision can be selected.
The connection mode of the high-precision resistance module and the main control module is combined into a DA conversion circuit, and the high-precision analog signal output end of the high-precision resistance module outputs analog voltage by controlling the actuation and the disconnection of the relay through high and low digital levels.
The utility model discloses when specifically using, open and produce high accuracy analog signal device, wait for several seconds time, let device self-checking accomplish, the self-checking is accomplished the back, the host computer just can send the message to the device through software, begin to carry out after the device is received and is handled, output high accuracy analog signal, the high accuracy analog signal that wherein produces can be fed back to the host computer, the adjustment is examined the new order of back device wait for the host computer.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (2)
1. A device for generating high-precision analog signals is characterized by comprising a main control module, an AD conversion module, a self-checking module, a high-precision resistance module, a power supply module and a communication module;
the high-precision analog signal device and the upper computer are communicated with each other in a message form;
the self-checking module also comprises a multi-channel analog switch;
the power supply module respectively supplies power to the main control module, the AD conversion module, the self-checking module, the high-precision resistance module and the communication module; the communication module is connected with the main control module and is used as a data conversion transmission channel of the upper computer and the high-precision analog signal device; the main control module is connected with the high-precision resistance module, and the high-precision resistance module generates a voltage with specified precision to output; the high-precision resistance module is connected with the AD conversion module and used for converting the voltage output by the high-precision resistance module into a digital signal; after the self-checking module is respectively connected with the high-precision resistance module and the AD conversion circuit, the self-checking module carries out multi-point voltage detection on the high-precision resistance circuit connected with the specified voltage; the main control circuit is connected with the self-checking module to narrow the fault detection range.
2. The apparatus of claim 1, wherein the high precision resistor module resistor R1-R (n +1), the fuse F1, the relays Q1-Q (n +3), and the diode D1, the resistor R1 has one end connected to ground and the other end connected to the resistor R2, the resistor R1 is connected to the 1 st pin and the 4 th pin of the relay Q-1 in parallel, the 2 nd pin of Q-1 is connected to the power supply, the 3 rd pin of Q-1 is connected to the control terminal JDQ1, the resistor R2 is connected to the 1 st pin and the 4 th pin of the relay Q-2 in parallel, the 2 nd pin of Q-2 is connected to the power supply, the 3 rd pin of Q-2 is connected to the control terminal JDQ2, the other end of the resistor R2 is connected to the resistors R3, R3 is connected to the 1 st pin and the 4 th pins of the relays Q-3 in parallel, the 2 nd pin of Q-3 is connected to the power supply, the 3 rd pin of Q-3 is connected to the control terminal JDQ3, the other end of R3 is connected with resistor R4, R4 and relay Q-4, the 1 st pin and 4 th pin are connected in parallel, the 2 nd pin of Q-4 is connected with the power supply, the 3 rd pin of Q-4 is connected with control end JDQ4, the other end of R4 is connected with resistor R5, R5 and relay Q-5, the 1 st pin and 4 th pin are connected in parallel, the 2 nd pin of Q-5 is connected with the power supply, the 3 rd pin of Q-5 is connected with control end JDQ5, the other end of R5 is connected with R6 and detection point CHECK _ AD1, CHECK _ 1 is connected with multi-channel analog switch, resistor R6 and Q-6, the 1 st pin and 4 pin are connected in parallel, the 2 nd pin of Q-6 is connected with the power supply, the 2 nd pin of Q-6 is connected with control end JDQ6, R15 and the 1 st pin and 4 th pin of relay Q-15 are connected in parallel, the 2 nd pin of Q-15 is connected with the power supply, the detection point JDQ15, R356, R16 and the other end of relay Q-15 is connected with analog switch and CHAD 2, and the other end of the multi-7, CHECK analog switch, the resistor R16 is connected with the 1 st pin and the 4 th pin of the relay Q-16 in parallel, the 2 nd pin of the Q-16 is connected with a power supply, the 3 rd pin of the Q-16 is connected with the control end JDQ16, the other end of the R16 is connected with the R17, the CHECK _ AD3 is connected with the multi-channel analog switch, the R26 is connected with the 1 st pin and the 4 th pin of the relay Q-26 in parallel, the 2 nd pin of the Q-26 is connected with the power supply, the 3 rd pin of the Q-26 is connected with the control end JDQ26, the other end of the R26 is connected with the R27, the R27 is connected with the 1 st pin and the 4 th pin of the relay Q-27 in parallel, the 2 nd pin of the Q-27 is connected with the power supply, the 3 rd pin of the Q-27 is connected with the control end JDQ27, the other end of the R27 is connected with the R28, the 1 st pin and the 4 th pin of the relay Q-28 in parallel, the 2 nd pin of the Q-28 is connected with the power supply, the 3 rd pin, the control end of the relay Q-28 is connected with the multi-JDQ 29, the multi-4, the multi-channel analog switch, the detection point is connected with the CHECAD switch 68692, the multi-AD switch and the multi-AD switch, r29 is connected with the 1 st pin and 4 th pin of the relay Q-29 IN parallel, the 2 nd pin of the Q-29 is connected with the power supply, the 3 rd pin of the Q-28 is connected with the control end JDQ29, the other end of R29 is connected with Rn and the detection point CHECK _ ADm, CHECK _ ADm and the multi-channel analog switch, the Rn is connected with the 1 st pin and 4 th pin of the relay Q-n IN parallel, the 2 nd pin of the Q-n is connected with the power supply, the 3 rd pin of the Q-n is connected with the control end JDQn, the Rn is connected with R (n +1), R (n +1) is connected with the 1 st pin and 4 th pin of the relay Q- (n +1) IN parallel, the 2 nd pin of the Q- (n +1) is connected with the power supply, the 3 rd pin of the Q- (n +1) is connected with the control end JDQ (n +1), the other end of the fuse F1, the other end of the F1 is connected with the 1 st pin of the Q- (n +2) and the 1 st pin of the Q- (n +3) and the IN (VR 2) is connected with the VR 2 st pin of the Q- (n +3), the 2 nd pin of Q- (n +2) connects the power, the 3 rd pin of Q- (n +2) connects control end JDQ (n +2), the 2 nd pin of Q- (n +3) connects the power, the 3 rd pin of Q- (n +3) connects control end JDQ (n +3), the 4 th pin of Q- (n +3) connects diode D1 negative terminal, the positive terminal VCC _ IN of D1, high accuracy analog signal output end is got IN the intermediate position of high accuracy resistance module resistance circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120259048.XU CN214174873U (en) | 2021-01-29 | 2021-01-29 | Device for generating high-precision analog signal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120259048.XU CN214174873U (en) | 2021-01-29 | 2021-01-29 | Device for generating high-precision analog signal |
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| CN214174873U true CN214174873U (en) | 2021-09-10 |
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