CN116719266B - Control apparatus - Google Patents
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- CN116719266B CN116719266B CN202310999066.5A CN202310999066A CN116719266B CN 116719266 B CN116719266 B CN 116719266B CN 202310999066 A CN202310999066 A CN 202310999066A CN 116719266 B CN116719266 B CN 116719266B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
Embodiments of the present disclosure relate to a control apparatus. The apparatus includes: a signal conversion module configured to convert a first input signal received for characterizing the detection information with respect to a first signal domain into a second input signal with respect to a second signal domain, and output a signal type signal corresponding to the first input signal; the analog-to-digital conversion module is electrically connected with the signal conversion module and is configured to convert a second input signal from the signal conversion module into a digital input signal; and the control module is respectively and electrically connected with the signal conversion module and the analog-to-digital conversion module, and is configured to generate a display control instruction according to the signal type signal and the digital input signal so as to display detection information corresponding to the first input signal. The scheme of the embodiment of the disclosure can enable the control equipment to be adapted to input signals of a plurality of different signal domains, and is particularly used for mixed signal input and output.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of automatic control, and more particularly to a control apparatus.
Background
Controllers are widely used in the field of automatic control, which is commonly used to collect signals from industrial sites and to control related equipment. For the signal collected by the controller, a voltage signal, for example, -5 to 5v (volts), is usually used to correspond to a predetermined signal range. That is, the controller can normally recognize and process signals conforming to a predetermined signal range. In the course of field applications of industrial systems, if a signal is to be received that does not meet a predetermined signal range, the adaptation of the signal by the current controller presents difficulties, such as requiring redesign of the controller.
Disclosure of Invention
In view of the above, the present disclosure provides a control device capable of adapting the control device to input signals of a plurality of different signal domains, in particular for mixed signal input and output.
According to one aspect of the present disclosure, a control apparatus is provided. The apparatus includes: a signal conversion module configured to convert a first input signal received for characterizing the detection information with respect to a first signal domain into a second input signal with respect to a second signal domain, and output a signal type signal corresponding to the first input signal; the analog-to-digital conversion module is electrically connected with the signal conversion module and is configured to convert a second input signal from the signal conversion module into a digital input signal; and the control module is respectively and electrically connected with the signal conversion module and the analog-to-digital conversion module, and is configured to generate a display control instruction according to the signal type signal and the digital input signal so as to display detection information corresponding to the first input signal.
In some embodiments, the signal conversion module further comprises: a signal type generating unit including: the first pull-up resistor is electrically connected with the power supply end, the other end of the first pull-up resistor is electrically connected with one end of the configuration switch, and the other end of the first pull-up resistor is configured to output a signal type signal; the other end of the configuration switch is electrically connected with one end of the first pull-down resistor; and the other end of the first pull-down resistor is grounded.
In some embodiments, the number of the signal conversion modules is a plurality, the control module includes a single-bit signal type input end, and the control module is further configured to sequentially scan the signal type output ends corresponding to the plurality of signal conversion modules through the single-bit signal type input end so as to sequentially obtain the signal type signals corresponding to the plurality of signal conversion modules.
In some embodiments, the apparatus further comprises: the input ends of the multi-path gating device are respectively and electrically connected with the signal type signals of the signal conversion modules, and the output end of the multi-path gating device is electrically connected with the signal type input end of one bit; and the control module is further configured to enable the plurality of input ends of the multi-path gating device to be sequentially and respectively communicated with the output ends of the multi-path gating device according to a preset sequence so as to sequentially acquire the signal type signals of the plurality of signal conversion modules.
In some embodiments, the first input signal for characterizing the detection information about the first signal domain comprises a first current signal for characterizing the detection information about the first current domain; the signal conversion module includes: a current conversion module configured to convert a first current signal for a first current domain for characterizing the detection information into a second current signal for a second current domain; the analog-to-digital conversion module includes: a current-voltage conversion unit configured to convert the second current signal into a first voltage signal; and an analog-to-digital conversion unit configured to convert the first voltage signal into a digital input signal.
In some embodiments, the control module is further configured to determine a sampling frequency of the analog-to-digital conversion unit from the signal type signal.
In some embodiments, the current signal output of the current conversion module comprises: the current signal output positive end and the current signal output negative end; the current-voltage conversion unit includes: one end of the first resistor is electrically connected with the current signal output positive end of the signal conversion module, and the other end of the first resistor is electrically connected with the drain electrode of the first MOS tube; the grid electrode of the first MOS tube is electrically connected with one end of the second resistor, and the source electrode of the first MOS tube is electrically connected with one end of the third resistor; the other end of the second resistor is electrically connected with one end of the sixth resistor and the cathode of the first diode; the other end of the sixth resistor is electrically connected with the power supply end; the positive electrode of the first diode is grounded; the other end of the third resistor is electrically connected with one end of the fourth resistor and one end of the seventh resistor; the other end of the fourth resistor is electrically connected with one end of the first capacitor and one end of the fifth resistor; the other end of the seventh resistor is grounded; a fifth resistor, the other end of which is electrically connected with one end of the second capacitor, and the other end of which is configured to output a first voltage signal; the other end of the first capacitor is grounded; the other end of the second capacitor is grounded; and the anode of the second diode is grounded, and the cathode of the second diode is electrically connected with the negative end of the current signal output.
In some embodiments, the apparatus further comprises an output module comprising: the digital-to-analog conversion unit is configured to convert the digital output signal output by the control module into an output voltage signal; and a voltage-current conversion unit configured to convert the output voltage signal into an output current signal with respect to the second current domain.
In some embodiments, the digital-to-analog conversion unit is configured to output a PWM signal; the voltage-current conversion unit includes: an eighth resistor, one end of which is configured to receive the PWM signal output by the digital-to-analog conversion unit, and the other end of which is electrically connected with one end of the ninth resistor and one end of the third capacitor; the other end of the ninth resistor is electrically connected with one end of the fourth capacitor and the positive input end of the first operational amplifier; the other end of the third capacitor is grounded; the other end of the fourth capacitor is grounded; the negative input end of the first operational amplifier is electrically connected with one end of the eleventh resistor, and the output end of the first operational amplifier is electrically connected with one end of the tenth resistor; one end of the fifth capacitor is electrically connected with one end of the eleventh resistor, and the other end of the fifth capacitor is electrically connected with one end of the tenth resistor; the other end of the tenth resistor is electrically connected with the grid electrode of the second MOS tube; the other end of the eleventh resistor is electrically connected with the source electrode of the second MOS tube and one end of the twelfth resistor; a twelfth resistor, the other end of which is grounded; the drain electrode of the second MOS tube is electrically connected with one end of the thirteenth resistor and is configured to output an output current signal related to the second current domain; and a thirteenth resistor, the other end of the thirteenth resistor is electrically connected with the power supply terminal.
In some embodiments, the digital-to-analog conversion unit is configured to output a PWM signal; the voltage-current conversion unit includes: a fourteenth resistor, one end of which is configured to receive the PWM signal output by the digital-to-analog conversion unit, and the other end of which is electrically connected with one end of the fifteenth resistor and one end of the sixth capacitor; a fifteenth resistor, the other end of which is electrically connected with one end of the seventh capacitor and the positive input end of the second operational amplifier; the other end of the sixth capacitor is grounded; the other end of the seventh capacitor is grounded; the negative input end of the second operational amplifier is electrically connected with the source electrode of the fourth MOS tube, and the output end of the second operational amplifier is electrically connected with one end of the sixteenth resistor; a sixteenth resistor, the other end of which is electrically connected with the grid electrode of the third MOS tube; the drain electrode of the third MOS tube is electrically connected with one end of the seventeenth resistor and one end of the nineteenth resistor, and the source electrode of the third MOS tube is electrically connected with the anode of the third diode; a third diode, the cathode of which is electrically connected with one end of the twenty-third resistor, the drain electrode of the second MOS tube is configured to output an output current signal related to the second current domain; the other end of the twenty-third resistor is grounded; a seventeenth resistor, the other end of which is electrically connected with the power supply end; a nineteenth resistor, the other end of which is electrically connected with the positive input end of the third operational amplifier; the negative input end of the third operational amplifier is electrically connected with one end of the eighteenth resistor, and the output end of the third operational amplifier is electrically connected with one end of the twenty-first resistor; the other end of the eighteenth resistor is electrically connected with the drain electrode of the fourth MOS tube and one end of the twentieth resistor; the twentieth resistor is electrically connected with the power supply end at the other end; the twenty-first resistor, the other end of the twenty-first resistor is connected with the grid electrode of the fourth MOS tube; the source electrode of the fourth MOS tube is electrically connected with one end of the twenty-second resistor; and the other end of the twenty-second resistor is grounded.
In some embodiments, the device further comprises a first circuit board and a second circuit board which are matched with each other, the signal conversion module is arranged on the first circuit board, and the analog-to-digital conversion module and the control module are arranged on the second circuit board; the first circuit board is also provided with a plurality of second pull-up resistors, one ends of the second pull-up resistors are respectively and electrically connected with the power supply end, and the other ends of the second pull-up resistors are respectively configured as module identification output ends; the second circuit board is also provided with a plurality of matching parts which are respectively matched with the plurality of module identification output ends, and the plurality of matching parts are insulation parts and/or grounding parts; and the control module is further configured to obtain the module identifier output by the module identifier output end so as to determine the signal conversion module.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.
Drawings
The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements.
Fig. 1 shows a block schematic diagram of a control device of an embodiment of the present disclosure.
Fig. 2 shows a block schematic diagram of a control device of an embodiment of the present disclosure.
Fig. 3 is a schematic diagram showing the structure of a first current-voltage conversion unit of the embodiment of the present disclosure.
Fig. 4 shows a schematic diagram of correspondence between detection information and signal type signals according to an embodiment of the present disclosure.
Fig. 5 shows a schematic structural diagram of a first current-voltage conversion unit of an embodiment of the present disclosure.
Fig. 6 shows a schematic structural diagram of a voltage-current conversion unit of an embodiment of the present disclosure.
Fig. 7 shows a schematic configuration diagram of a voltage-current conversion unit of an embodiment of the present disclosure.
Fig. 8 shows a schematic diagram of a first circuit board and a second circuit board of an implementation of the present disclosure.
Fig. 9 shows a block schematic diagram of a control device of an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.
As described above, the controller has difficulty in adapting signals that do not meet a predetermined signal range. To solve the signal access problem of a plurality of different signal ranges, the following schemes are generally adopted. First, for example, with a general purpose Programmable Logic Controller (PLC), signals of different signal ranges are sampled with different types of IO (input output) modules, one typically having multiple channels, e.g., 8 channels or 16 channels. For general-purpose programmable logic controllers, they are generally able to adapt to signals of a variety of general-purpose signal ranges, but for signals of a very general-purpose signal range, redevelopment is required. It will be appreciated that this approach is wasteful for applications where the point requirements are small. Second, for example, an integrated controller may be employed on the basis of the first scheme. The integrated controller is provided with IO interfaces which can adapt to signals in various common signal ranges, has moderate points, and is suitable for small-scale control occasions. However, the signal range that the integrated controller can adapt to is also limited and fixed, and if it is necessary to adapt to signals of other signal ranges, it is also necessary to re-develop. Third, for example, a general IO technique is employed. For example, in the scheme described in "an IO control system" (CN 106200749 a), each channel of the IO control system may be configured as DI/DO/AI/AO/PI, and the adaptation of signals in a plurality of different signal ranges can be achieved by configuration as long as the required number of points is known. However, the signals of the different signal ranges supported (i.e. adapted) by this scheme are also common signals. If the very common signals need to be supported, the signals need to be re-developed, so that reliability is reduced, and cost is increased.
To at least partially address one or more of the above problems, as well as other potential problems, example embodiments of the present disclosure propose a control device. The signal conversion module converts a first input signal related to a first signal domain into a second input signal related to a second signal domain and outputs a signal type signal corresponding to the first input signal; the control module is configured to determine, according to the signal type signal and the digital input signal, detection information (for example, an actual physical quantity corresponding to the detection information) and a numerical value (for example, a numerical value corresponding to the actual physical quantity) corresponding to the detection information, which are characterized by the received digital input signal, and the control module generates a display control instruction, and may be used to display the detection information. The solution thus enables the control device to be adapted to input signals of a plurality of different signal domains, in particular for mixed signal input and output.
Fig. 1 shows a block schematic diagram of a control device 100 of an embodiment of the present disclosure. The control device 100 includes a signal conversion module 102, an analog-to-digital conversion module 104, and a control module 106. The signal conversion module 102 is configured to convert a first input signal received for characterizing the detection information with respect to a first signal domain into a second input signal with respect to a second signal domain, and to output a signal type signal corresponding to the first input signal. The analog-to-digital conversion module 104 is electrically connected to the signal conversion module 102, the analog-to-digital conversion module 104 being configured to convert a second input signal from the signal conversion module 102 to a digital input signal. The control module 106 is electrically connected to the signal conversion module 102 and the analog-to-digital conversion module 104, respectively, and the control module 106 is configured to generate a display control instruction according to the signal type signal and the digital input signal, so as to display the detection information corresponding to the first input signal.
In some embodiments, the first input signal for characterizing the detection information in relation to the first signal domain comprises a first current signal for characterizing the detection information in relation to the first current domain. The signal conversion module includes a current conversion module configured to convert a first current signal for a first current domain used to characterize the detection information into a second current signal for a second current domain. The analog-to-digital conversion module comprises a current-voltage conversion unit and an analog-to-digital conversion unit. The current-voltage conversion unit is configured to convert the second current signal into a first voltage signal; the analog-to-digital conversion unit is configured to convert the first voltage signal into a digital input signal.
In some embodiments, the first input signal for characterizing the detection information in relation to the first signal domain comprises a voltage signal for characterizing the detection information in relation to the first voltage domain. The signal conversion module may also be a voltage conversion module configured to convert a voltage signal relating to a first voltage domain for characterizing the detection information into a voltage signal relating to a second voltage domain.
In some embodiments, the signal conversion module further comprises a signal type generation unit. The signal type generating unit comprises a first pull-up resistor, a configuration switch and a first pull-down resistor. One end of the first pull-up resistor is electrically connected with the power supply end, the other end of the first pull-up resistor is electrically connected with one end of the configuration switch, and the other end of the first pull-up resistor is configured to output a signal type signal; the other end of the configuration switch is electrically connected with one end of the first pull-down resistor; the other end of the first pull-down resistor is grounded.
It should be noted that the control apparatus 100 may be applied to an industrial system, for example. The signal conversion module 102 is for example in communication with the detection unit 20 for receiving a first input signal from the detection unit 20 for characterizing the detection information in relation to the first signal domain. Wherein the detection unit 20 is used for detection to obtain detection information.
The control module 106 may be implemented based on an FPGA (Field Programmable Gate Array ), or may be implemented based on an MCU (Micro Controller Unit, micro control unit), a CPU (Central Processing Unit ), an MPU (Micro Processing Unit, microprocessor), a GPU (Graphics Processing Units, graphics processor), or the like.
Fig. 2 shows a block schematic diagram of a control device 200 of an embodiment of the present disclosure. The number of the signal conversion modules is multiple, and each of the multiple signal conversion modules corresponds to one detection unit. The detection information detected by the respective detection units may be different. Each detection unit may have a different first signal domain. Each signal conversion module respectively converts a first input signal of a corresponding first signal domain into a second input signal related to a second signal domain.
The first detection unit 212 is, for example, a detection unit for detecting thermal resistance temperature information in an industrial system among a plurality of detection units. The second detection unit 214 is, for example, a detection unit for detecting current information in an industrial system. The nth detection unit 216 is, for example, a detection unit for detecting voltage information in an industrial system. The plurality of detection units further include, for example, a detection unit for detecting thermocouple temperature information in an industrial system, a detection unit for detecting switching value information in an industrial system, and the like.
For example, the first detection unit 212 is a detection unit for detecting thermal resistance temperature information in an industrial system. The first detection unit 212 transmits the detected detection information (e.g., thermal resistance temperature information) to the control device 100 in the form of a first input signal with respect to the first signal domain. The signal output by the first detection unit 212 may be a first current signal representing the detection information with respect to the first current domain. For example, the first current domain is, for example, 20-60 mA (milliamp), and the first current domain is used for representing a temperature range of-20-250 ℃ (degrees Celsius). For example, the first detection unit 212 outputs a first current signal of 20mA, which characterizes that the temperature information of the thermal resistor detected by the first detection unit 212 is-20 ℃; the first detection unit 212 outputs a first current signal of 40mA, which characterizes the thermal resistance temperature information detected by the first detection unit 212 as 115 ℃.
The plurality of signal conversion modules includes a first current conversion module 112, a second current conversion module 114, an nth current conversion module 116, and the like.
Taking the first current conversion module 112 as an example, it converts the first current signal (for example, a 40mA signal for representing the thermal resistance temperature information of 115 ℃) output by the first detection unit 212 into a second current signal about the second current domain. The second current region is, for example, 4-20 mA. The second current domain corresponds to a temperature range of-20-250 ℃ corresponding to the temperature information of the thermal resistor, which is represented by the first current domain corresponding to the detection information of the first detection unit 212. The first current conversion module 112 converts a 40mA (first current signal) signal with respect to the first current domain into a 12mA (second current signal) signal with respect to the second current domain.
The analog-to-digital conversion module 104 includes, for example, a current-to-voltage conversion unit and an analog-to-digital conversion unit 140. Wherein the current-voltage conversion unit is configured to convert the second current signal into the first voltage signal. The analog-to-digital conversion unit 140 is configured to convert the first voltage signal into a digital input signal. Assume that the digital input signal generated by the analog-to-digital conversion unit 140 for the X-th channel is "ABCD" (16-bit signal).
The current-voltage converting units include, for example, a first current-voltage converting unit 142, a second current-voltage converting unit 144, an nth current-voltage converting unit 146, and the like.
Fig. 5 shows a schematic structural diagram of a first current-voltage conversion unit 142 of an embodiment of the present disclosure. Taking the first current-voltage conversion unit 142 as an example, it converts a 12mA (second current signal) signal of the second current domain into a corresponding first voltage signal. Fig. 3 shows a schematic structural diagram of a first current-voltage conversion unit 142 of the embodiment of the present disclosure. The current signal output end of the current conversion module comprises: the current signal outputs positive terminal IN1 and the current signal outputs negative terminal GNDA. The first current-voltage conversion unit 142 includes: the first resistor R1, the first MOS transistor M1, the second resistor R2, the sixth resistor R6, the first diode D1, the third resistor R3, the fourth resistor R4, the seventh resistor R7, the fifth resistor R5, the first capacitor C1, the second capacitor C2 and the second diode D2. One end of the first resistor R1 is electrically connected with a current signal output positive end IN1 of the signal conversion module, and the other end of the first resistor R1 is electrically connected with a drain electrode of the first MOS tube M1; the grid electrode of the first MOS tube M1 is electrically connected with one end of the second resistor R2, and the source electrode of the first MOS tube M1 is electrically connected with one end of the third resistor R3; the other end of the second resistor R2 is electrically connected with one end of the sixth resistor R6 and the cathode of the first diode D1; the other end of the sixth resistor R6 is electrically connected with the power supply end; the positive electrode of the first diode D1 is Grounded (GND); the other end of the third resistor R3 is electrically connected with one end of the fourth resistor R4 and one end of the seventh resistor R7; the other end of the fourth resistor R4 is electrically connected with one end of the first capacitor C1 and one end of the fifth resistor R5; the other end of the seventh resistor R7 is grounded; the other end of the fifth resistor R5 is electrically connected to one end of the second capacitor C2, and the other end of the fifth resistor R5 is configured to output the first voltage signal AIN1; the other end of the first capacitor C1 is grounded; the other end of the second capacitor C2 is grounded; the positive electrode of the second diode D2 is grounded, and the negative electrode of the second diode D2 is electrically connected with the negative end GNDA of the current signal output.
It should be noted that the first current-voltage conversion unit 142 receives the second current signal from the first current conversion module 112. In some embodiments, the second current signal corresponds to a second current domain of, for example, 4-20mA. In the first current-voltage conversion unit 142, the seventh resistor R7 is a sampling resistor, and the seventh resistor R7 may be a resistor with high accuracy and high temperature stability. The third resistor R3 and the first resistor R1 are current limiting resistors, and the fourth resistor R4, the fifth resistor R5, the first capacitor C1 and the second capacitor C2 form a second-order filter network. D1 is a reverse connection preventing diode, which can prevent signal wiring errors or external reverse interference from entering. The second diode D2 is a zener diode. The first diode D1, the first MOS tube M1, the third resistor R3 and the seventh resistor R7 form a current limiting network, and when large current or large voltage is injected, the current flowing through the current limiting network can be effectively limited. It should be noted that, the opening voltage Vgs of the first MOS transistor M1 is 2 to 4v, the voltage of the second diode D2 is VD, and the limiting current il= (VD-Vgs)/(r7+r3). In some embodiments, the voltage VD of the second diode D2 is 8.2V, the seventh resistance R7 is 100 Ω (ohms), and the third resistance R3 is 51 Ω. At this time, the limiting current IL is about 27.8mA to 41mA.
The analog-to-digital conversion unit 140 is configured to convert the first voltage signal into a digital input signal. It should be noted that the analog-to-digital conversion unit 140 is a multi-channel analog-to-digital conversion unit. For example, the channels of the first detection unit 212, the first current conversion module 112, and the first current-voltage conversion unit 142 are the first channels, the channels of the second detection unit 214, the second current conversion module 114, and the second current-voltage conversion unit 144 are the second channels, and the channels of the nth detection unit 216, the nth current conversion module 116, and the nth current-voltage conversion unit 146 are the nth channels. The control module 106 may control the analog-to-digital conversion unit 140 to sample the signals of the plurality of channels, respectively. The control module 106 may also configure the sampling frequency at which the analog-to-digital conversion unit 140 samples for each channel.
Fig. 3 shows a schematic configuration diagram of a signal type generating unit 300 of an embodiment of the present disclosure. The signal type generating unit 300 includes a first pull-up resistor RU1, a configuration switch K1, and a first pull-down resistor RD1. One end of the first pull-up resistor RU1 is electrically connected to the power source terminal, the other end of the first pull-up resistor RU1 is electrically connected to one end of the configuration switch K1, and the other end of the first pull-up resistor RU1 is configured to output a signal type signal. The other end of the configuration switch K1 is electrically connected with one end of the first pull-down resistor RD 1; the other end of the first pull-down resistor RD1 is grounded.
It should be noted that one signal type generating unit 300 may generate one-bit signal type signals. When the configuration switch K1 is configured to be turned on, the signal type generating unit 300 outputs a signal type signal of a low level; when the configuration switch K1 is configured to be turned off, the signal type generating unit 300 outputs a signal type signal of a high level. The signal conversion module may include a plurality of signal type generating units 300 to generate multi-bit signal type signals. For example, in the case where the signal type signal is three bits, three signal type generating units 300 are arranged in the signal conversion module, and the signal type signals output by the three signal type generating units 300 are "A1, A2, A3".
It should be noted that, after determining the detection information detected by the detection unit corresponding to the signal conversion module, the signal type generating unit may configure a signal type signal for the signal conversion module. The signal type signal configured to be formed corresponds to the detection information detected by the detection unit corresponding to the signal conversion module. Fig. 4 shows a schematic diagram of correspondence between detection information and signal type signals according to an embodiment of the present disclosure. For example, the signal type signal of the first current conversion module 112 is configured as a three-bit signal "010", and the signal type signal of the second current conversion module 114 is configured as a three-bit signal "000".
In some embodiments, the number of the signal conversion modules is a plurality, the control module includes a single-bit signal type input end, and the control module is further configured to sequentially scan the signal type output ends corresponding to the plurality of signal conversion modules through the single-bit signal type input end so as to sequentially obtain the signal type signals corresponding to the plurality of signal conversion modules.
For example, the control device 200 further includes a plurality of strobe devices, wherein a plurality of input terminals of the plurality of strobe devices are electrically connected to the signal type signals of the plurality of signal conversion modules, respectively, and an output terminal of the plurality of strobe devices is electrically connected to the signal type input terminal of one bit. The control module 106 is further configured to cause the plurality of inputs of the multi-way gating device to sequentially and respectively communicate with the outputs of the multi-way gating device in a predetermined order to sequentially acquire the signal type signals of the plurality of signal conversion modules. In particular, one pin of the control module 106 is configured as the one-bit signal type input. Each bit of the signal type signals of the plurality of signal conversion modules is electrically connected with the input end of the multi-path gating device respectively. Taking the control device 200 as an example, the number of signal conversion devices is n, and the signal type signal corresponding to each signal conversion device is 3 bits, and then the multiplexing device has 3*n input terminals. It should be appreciated that the multiplexing means may be a multiplexing analog switch or a multiplexer. It should be noted that, by acquiring the signal type signal by the scanning manner, the number of pins required to be occupied can be significantly saved.
It should be appreciated that the control module 106 has a plurality of type signal pins that are electrically connected to the signal type signals of the plurality of signal conversion modules, respectively, to obtain the signal type signals of the plurality of signal conversion modules.
The correspondence between the signal type signal and the corresponding detection information is formed by pre-arrangement. The control module 106 obtains a signal type signal corresponding to the signal conversion module, and can determine a signal type (i.e. a detection information type) transmitted through the signal conversion module according to the signal type signal, and the control module 106 can determine a value of an actual physical quantity corresponding to the received digital input signal according to the signal type signal. It should be understood that the correspondence of the numerical values of the actual physical quantities to which the digital input signals correspond is also formed by pre-configuration. For example, based on the received signal type signal being "010" and the received digital input signal being "ABCD", the control module 106 determines that the received digital input signal via the X-th channel characterizes "thermal resistance temperature information is 115 ℃". Accordingly, the control module 106 generates a display control instruction according to the signal type signal and the digital input signal, so as to display the detection information corresponding to the first input signal. For example, the display device displays "thermal resistance temperature" according to the display control instruction generated by the control module 106: 115 deg.c.
In some embodiments, the control module 106 is further configured to determine the sampling frequency of the analog-to-digital conversion unit from the signal type signal. For example, if the control module 106 determines that the detected signal corresponding to the signal type signal represents the temperature signal, and the cycle period corresponding to the temperature signal is long (for example, in seconds), the control module 106 determines that the sampling frequency of the analog-to-digital conversion unit matches the cycle period corresponding to the temperature signal. The control module 106 determines that the detection signal corresponding to the signal type signal represents the current-voltage analog signal, and the cycle period corresponding to the current-voltage analog signal is, for example, in the order of tens of milliseconds, and then the control module 106 determines that the sampling frequency of the analog-to-digital conversion unit matches with the cycle period corresponding to the current-voltage analog signal. The control module 106 determines that the detection signal corresponding to the signal type signal represents the switching value signal, and the cycle period corresponding to the switching value signal is, for example, in millisecond level, and then the control module 106 determines that the sampling frequency of the analog-to-digital conversion unit is matched with the cycle period corresponding to the switching value signal.
It should be noted that the control device 200 further includes an output module (not shown in the figure), and the output module is disposed on an output channel of the control device.
Fig. 9 shows a block schematic diagram of a control device 900 of an embodiment of the present disclosure. The control device 900 further comprises an output module 220. The output module 220 includes: digital-to-analog conversion unit and voltage-to-current conversion unit. The digital-to-analog conversion unit is configured to convert a digital output signal output by the control module into an output voltage signal. The voltage-to-current conversion unit is configured to convert the output voltage signal into an output current signal for the second current domain. The digital-to-analog conversion units include, for example, a first digital-to-analog conversion unit 222, a second digital-to-analog conversion unit 224, an mth digital-to-analog conversion unit 226, and the like. The voltage-current conversion units include, for example, a first voltage-current conversion unit 232, a second voltage-current conversion unit 234, an mth voltage-current conversion unit 236, and the like. The voltage-current conversion unit may be implemented by using the voltage-current conversion unit 600 shown in fig. 6, or by using the voltage-current conversion unit 700 shown in fig. 7.
For convenience of explanation, the right side terminal of the first detecting unit 212 in the drawing is referred to as a "first end", and the left side terminal of the first detecting unit 212 in the drawing is referred to as a "second end". It should be noted that, when the first end of the first detecting unit 212 is used as an input end to receive the first current signal related to the first current domain, the second end of the first detecting unit 212 is used as an output end to output the second current signal related to the second current domain. When the second end of the first detection unit 212 is used as the input end to receive the second current signal related to the second current domain, the first end of the first detection unit 212 is used as the output end to output the first current signal related to the first current domain. The second current conversion module 114, the nth current conversion module 116, etc. are similar to the first current conversion module 112, and will not be described again here.
Note that, in the control apparatus 900, the first detection unit 212, the second detection unit 214, the nth detection unit 216, and the like may be at least one of a sensor unit and an instrument unit. In some embodiments, the plurality of detection units may unidirectional transmit signals with the corresponding signal conversion modules, respectively. In some embodiments, the plurality of detection units may respectively bidirectionally transmit signals with the corresponding signal conversion modules. For example, in some embodiments, the first detection unit 212 transmits a first current signal regarding the first current domain to the first current conversion module 112. For another example, in some embodiments, the first detection unit 212 receives a first current signal from the first current conversion module 112 regarding the first current domain. For another example, in some embodiments, the first detection unit 212 transmits the first current signal regarding the first current domain to the first current conversion module 112 for some times, and the first detection unit 212 receives the first current signal regarding the first current domain from the first current conversion module 112 for other times. The second current conversion module 114, the nth current conversion module 116, etc. are similar to the first current conversion module 112, and will not be described again here.
The control device 900 further includes switching units, for example, a first switching unit 902, a second switching unit 904, and a third switching unit 906. The switching unit includes three terminals, namely a first terminal P1, a second terminal P2 and a third terminal P3. By setting a key in the switching unit, the first terminal P1 and the second terminal P2 can be turned on, or the first terminal P1 and the third terminal P3 can be turned on. The first terminal P1 of the first switching unit 902 is electrically connected to the second end of the first current conversion module 112, the second terminal P2 of the first switching unit 902 is electrically connected to the input end of the first current-voltage conversion unit 142, and the third terminal P2 of the first switching unit 902 is electrically connected to the output end of the first voltage-current conversion unit 232. The first terminal P1 of the second switching unit 904 is electrically connected to the second end of the second current conversion module 114, the second terminal P2 of the second switching unit 904 is electrically connected to the input end of the second current-to-voltage conversion unit 144, and the third terminal P2 of the second switching unit 904 is electrically connected to the output end of the second voltage-to-current conversion unit 234. The first terminal P1 of the nth switching unit 906 is electrically connected to the second terminal of the nth current converting module 116, the second terminal P2 of the nth switching unit 906 is electrically connected to the input terminal of the nth current-voltage converting unit 146, and the third terminal P2 of the nth switching unit 902 is electrically connected to the output terminal of the nth voltage-current converting unit 236.
The first detection unit 212 is assumed to be a sensor unit for acquiring detection information and transmitting a signal to the control device 900. The first current conversion module 112, which matches the first current signal for the first current domain acquired by the first detection unit 212 for characterizing the detection information, may be connected to the control device 900 and the first switching unit 902 may be configured such that the first terminal P1 is connected to the second terminal P2. At this time, the channels formed by the first detection unit 212, the first current conversion module 112, the first switching unit 902, the first current-voltage conversion unit 142, and the like may be referred to as "input channels".
The nth detection unit 216 is assumed to be a meter unit for receiving a signal from the control apparatus 900 and displaying detection information. The nth current conversion module 116, which matches the first current signal for the first current domain acquired by the nth detection unit 216 for characterizing the detection information, may be connected to the control device 900 and the nth switching unit 906 may be configured to switch on the first terminal P1 and the third terminal P3. At this time, the channels formed by the nth detection unit 216, the nth current conversion module 116, the nth switching unit 906, the nth current-voltage conversion unit 146, and the like may be referred to as "output channels".
In the scheme, mixed signal input and output can be flexibly realized as long as the adaptive signal conversion unit is accessed to the corresponding channel and the switching unit is reasonably configured.
Fig. 6 shows a schematic structural diagram of a voltage-current conversion unit 600 of an embodiment of the present disclosure. In some embodiments, the digital-to-analog conversion unit is configured to output the PWM signal PWMIN. The voltage-current conversion unit 600 includes: eighth resistor R8, ninth resistor R9, third capacitor C3, fourth capacitor C4, first operational amplifier AMP1, fifth capacitor C5, tenth resistor R10, eleventh resistor R11, twelfth resistor R12, second MOS transistor M2, thirteenth resistor R13. One end of the eighth resistor R8 is configured to receive the PWM signal PWMIN output by the digital-to-analog conversion unit, and the other end of the eighth resistor R8 is electrically connected to one end of the ninth resistor R9 and one end of the third capacitor C3; the other end of the ninth resistor R9 is electrically connected to one end of the fourth capacitor C4 and the positive input end of the first operational amplifier AMP 1; the other end of the third capacitor C3 is grounded; the other end of the fourth capacitor C4 is grounded; the negative input end of the first operational amplifier AMP1 is electrically connected with one end of the eleventh resistor R11, and the output end of the first operational amplifier AMP1 is electrically connected with one end of the tenth resistor R10; one end of the fifth capacitor C5 is electrically connected with one end of the eleventh resistor R11, and the other end of the fifth capacitor C5 is electrically connected with one end of the tenth resistor R10; the other end of the tenth resistor R10 is electrically connected with the grid electrode of the second MOS tube M2; the other end of the eleventh resistor R11 is electrically connected with the source electrode of the second MOS tube M2 and one end of the twelfth resistor R12; the other end of the twelfth resistor R12 is grounded; the drain electrode of the second MOS tube M2 is electrically connected with one end of the thirteenth resistor R13, and the drain electrode of the second MOS tube M2 is configured to output an output current signal SO2 related to the second current domain; the other end of the thirteenth resistor R13 is electrically connected to the power supply terminal VCC.
It should be noted that, the eighth resistor R8, the ninth resistor R9, the third capacitor C3, and the fourth capacitor C4 form a second-order RC filter network. R12 is a feedback resistor. The output current i=apwm×du/R12 of the voltage-current conversion unit. Where APWM characterizes the amplitude of the PWM signal and Du characterizes the duty cycle of the PWM signal. The voltage on the R12 resistor can be used for feeding back the magnitude of the output current.
Fig. 7 shows a schematic configuration diagram of a voltage-current conversion unit 700 of an embodiment of the present disclosure. In some embodiments, the digital-to-analog conversion unit is configured to output the PWM signal PWMIN. The voltage-current conversion unit 700 includes: fourteenth resistor R14, fifteenth resistor R15, sixth capacitor C6, seventh capacitor C7, second operational amplifier AMP2, sixteenth resistor R16, third MOS transistor M3, third diode D3, twenty-third resistor R23, seventeenth resistor R17, nineteenth resistor R19, third operational amplifier AMP3, eighteenth resistor R18, twentieth resistor R20, twenty-first resistor R21, fourth MOS transistor M4, twenty-second resistor R22.
One end of the fourteenth resistor R14 is configured to receive the PWM signal PWMIN output by the digital-to-analog conversion unit, and the other end of the fourteenth resistor R14 is electrically connected to one end of the fifteenth resistor R15 and one end of the sixth capacitor C6; the other end of the fifteenth resistor R15 is electrically connected to one end of the seventh capacitor C7 and the positive input terminal of the second operational amplifier AMP 2; the other end of the sixth capacitor C6 is grounded; the other end of the seventh capacitor C7 is grounded; the negative input end of the second operational amplifier AMP2 is electrically connected with the source electrode of the fourth MOS tube M4, and the output end of the second operational amplifier AMP2 is electrically connected with one end of a sixteenth resistor R16; the other end of the sixteenth resistor R16 is electrically connected with the grid electrode of the third MOS tube M3; the drain electrode of the third MOS tube M3 is electrically connected with one end of a seventeenth resistor R17 and one end of a nineteenth resistor R19, and the source electrode of the third MOS tube M3 is electrically connected with the anode of a third diode D3; the cathode of the third diode D3 is electrically connected to one end of the twenty-third resistor R23 and configured to output an output current signal SO2 regarding the second current domain; the other end of the twenty-third resistor R23 is grounded; the other end of the seventeenth resistor R17 is electrically connected with the power supply end; the other end of the nineteenth resistor R19 is electrically connected to the positive input terminal of the third operational amplifier AMP 3; the negative input end of the third operational amplifier AMP3 is electrically connected with one end of an eighteenth resistor R18, and the output end of the third operational amplifier AMP3 is electrically connected with one end of a twenty-first resistor R21; the other end of the eighteenth resistor R18 is electrically connected with the drain electrode of the fourth MOS tube M4 and one end of the twentieth resistor R20; the other end of the twentieth resistor R20 is electrically connected with the power supply end; the other end of the twenty-first resistor R21 is electrically connected with the grid electrode of the fourth MOS tube M4; the source electrode of the fourth MOS tube M4 is electrically connected with one end of a twenty-second resistor R22; the other end of the twenty-second resistor R22 is grounded.
Note that, in the voltage-current conversion unit 700, r20=r22, and the seventeenth resistor R17 employs a resistor with high accuracy and high temperature stability. The output current i=apwm×du/R17 of the voltage-current conversion unit 600. Wherein the feedback voltage FB can be used for diagnosis of whether the output current is normal or not. In some embodiments, the control module is further configured to obtain a feedback voltage FB with respect to one end of the twenty-second resistor R22, so as to determine whether the output current signal with respect to the second current domain output by the voltage-current conversion unit is normal according to the feedback voltage. Note that, in normal cases, the feedback voltage fb=apwm×du. When the output current of the voltage-current conversion unit is smaller than the preset current threshold value, the currents flowing through the twentieth resistor R20 and the twenty-second resistor R22 are all smaller in the same proportion, so that the feedback voltage FB is smaller in the same proportion, and the change of the output current I can be judged through the change of the feedback voltage FB.
Fig. 8 shows a schematic diagram of a first circuit board 802 and a second circuit board 804 of an implementation of the present disclosure. The control device 200 further includes a first circuit board 802 and a second circuit board 804 that cooperate with each other. The signal conversion module is disposed on the first circuit board 802, and the analog-to-digital conversion module and the control module are disposed on the second circuit board. The first circuit board 802 is further provided with a plurality of second pull-up resistors RU2, one ends of the second pull-up resistors RU2 are respectively and electrically connected with the power supply end, and the other ends of the second pull-up resistors RU2 are respectively configured as module identification output ends; the second circuit board 804 is further provided with a plurality of mating portions that are respectively mated with the plurality of module identifier output terminals, where the plurality of mating portions are an insulating portion 806 and/or a grounding portion 808. The control module 106 is further configured to obtain the module identification output by the module identification output to determine the signal conversion module.
It should be noted that, after the first circuit board 802 and the second circuit board 804 are mated (e.g., plugged), the plurality of second pull-up resistors RU2 on the first circuit board 802 are respectively mated with the plurality of mating portions on the second circuit board 804. The plurality of mating portions may be the insulating portion 806 and/or the grounding portion 808, and may specifically be determined according to a channel number corresponding to the corresponding signal conversion module. The ground 808 is provided with a pull-down resistor RD2 connected to ground. The insulating portion 806 is insulated from the Ground (GND). It should be understood that when the mated mating portion is a ground portion, the corresponding bit of the module identification output outputs a low level signal; when the matched matching part is an insulating part, the corresponding bit of the module identification output end outputs a high-level signal. For example, for the second channel, three mating portions on the second circuit board 804 that are respectively mated with three second pull-up resistors are respectively "ground portion", "insulating portion". When the first circuit board 802 is matched with the second circuit board 804, the module identifiers "B1, B2, B3" output by the module identifier output end are "001", and the control module 106 can determine that the first circuit board 802 is plugged into the second channel according to the "001". It should be noted that, the second circuit board 804 is provided with a plurality of sets of matching portions, and in the plurality of sets of matching portions, a combination form of an insulating portion and/or a grounding portion provided in each set of matching portion is different, and the combination form is matched with the corresponding channel. The first circuit board 802 side does not need to be modified, and the channel number (i.e. the module identifier corresponding to the signal conversion module on the first circuit board 802 at this time) of the first circuit board 802 can be identified by the control module 106 only by plugging the first circuit board 802 with the matching portion corresponding to any one channel.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
The above is only an alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control apparatus, characterized by comprising:
a signal conversion module configured to convert a first input signal received for characterizing detection information with respect to a first signal domain into a second input signal with respect to a second signal domain, and to output a signal type signal corresponding to the first input signal, the signal type signal corresponding to the detection information;
The analog-to-digital conversion module is electrically connected with the signal conversion module and is configured to convert a second input signal from the signal conversion module into a digital input signal; and
the control module is respectively and electrically connected with the signal conversion module and the analog-to-digital conversion module, and is configured to generate a display control instruction according to the signal type signal and the digital input signal so as to be used for displaying detection information corresponding to the first input signal, and the signal conversion module further comprises: a signal type generating unit including:
the first pull-up resistor is electrically connected with the power supply end, the other end of the first pull-up resistor is electrically connected with one end of the configuration switch, and the other end of the first pull-up resistor is configured to output a signal type signal;
the other end of the configuration switch is electrically connected with one end of the first pull-down resistor; and
the other end of the first pull-down resistor is grounded.
2. The apparatus of claim 1, wherein the number of signal conversion modules is plural, the control module includes a one-bit signal type input, and the control module is further configured to sequentially scan signal type outputs corresponding to the plurality of signal conversion modules via the one-bit signal type input to sequentially obtain signal type signals corresponding to the plurality of signal conversion modules.
3. The apparatus as claimed in claim 2, further comprising:
the input ends of the multi-path gating device are respectively and electrically connected with the signal type signals of the signal conversion modules, and the output end of the multi-path gating device is electrically connected with the signal type input end of one bit; and
the control module is further configured to sequentially and respectively connect the plurality of input terminals of the multi-path gating device to the output terminals of the multi-path gating device in a predetermined order so as to sequentially acquire the signal type signals of the plurality of signal conversion modules.
4. The device of claim 1, wherein the first input signal for characterizing the detection information for the first signal domain comprises a first current signal for characterizing the detection information for the first current domain;
the signal conversion module includes: a current conversion module configured to convert a first current signal for a first current domain for characterizing the detection information into a second current signal for a second current domain; and
the analog-to-digital conversion module includes:
a current-voltage conversion unit configured to convert the second current signal into a first voltage signal; and
And an analog-to-digital conversion unit configured to convert the first voltage signal into a digital input signal.
5. The device of claim 4, wherein the control module is further configured to determine the sampling frequency of the analog-to-digital conversion unit based on the signal type signal.
6. The apparatus of claim 4, wherein the current signal output of the current conversion module comprises: the current signal output positive end and the current signal output negative end; and
the current-voltage conversion unit includes:
one end of the first resistor is electrically connected with the current signal output positive end of the signal conversion module, and the other end of the first resistor is electrically connected with the drain electrode of the first MOS tube;
the grid electrode of the first MOS tube is electrically connected with one end of the second resistor, and the source electrode of the first MOS tube is electrically connected with one end of the third resistor;
the other end of the second resistor is electrically connected with one end of the sixth resistor and the cathode of the first diode;
the other end of the sixth resistor is electrically connected with the power supply end;
the positive electrode of the first diode is grounded;
the other end of the third resistor is electrically connected with one end of the fourth resistor and one end of the seventh resistor;
The other end of the fourth resistor is electrically connected with one end of the first capacitor and one end of the fifth resistor;
the other end of the seventh resistor is grounded;
a fifth resistor, the other end of which is electrically connected with one end of the second capacitor, and the other end of which is configured to output a first voltage signal;
the other end of the first capacitor is grounded;
the other end of the second capacitor is grounded; and
and the anode of the second diode is grounded, and the cathode of the second diode is electrically connected with the negative end of the current signal output.
7. The apparatus of claim 4, further comprising an output module comprising:
the digital-to-analog conversion unit is configured to convert the digital output signal output by the control module into an output voltage signal; and
and a voltage-current conversion unit configured to convert the output voltage signal into an output current signal with respect to the second current domain.
8. The apparatus of claim 7, wherein the digital-to-analog conversion unit is configured to output a PWM signal;
the voltage-current conversion unit includes:
an eighth resistor, one end of which is configured to receive the PWM signal output by the digital-to-analog conversion unit, and the other end of which is electrically connected with one end of the ninth resistor and one end of the third capacitor;
The other end of the ninth resistor is electrically connected with one end of the fourth capacitor and the positive input end of the first operational amplifier;
the other end of the third capacitor is grounded;
the other end of the fourth capacitor is grounded;
the negative input end of the first operational amplifier is electrically connected with one end of the eleventh resistor, and the output end of the first operational amplifier is electrically connected with one end of the tenth resistor;
one end of the fifth capacitor is electrically connected with one end of the eleventh resistor, and the other end of the fifth capacitor is electrically connected with one end of the tenth resistor;
the other end of the tenth resistor is electrically connected with the grid electrode of the second MOS tube;
the other end of the eleventh resistor is electrically connected with the source electrode of the second MOS tube and one end of the twelfth resistor;
a twelfth resistor, the other end of which is grounded;
the drain electrode of the second MOS tube is electrically connected with one end of the thirteenth resistor and is configured to output an output current signal related to the second current domain; and
and the other end of the thirteenth resistor is electrically connected with the power supply end.
9. The apparatus of claim 7, wherein the digital-to-analog conversion unit is configured to output a PWM signal;
The voltage-current conversion unit includes:
a fourteenth resistor, one end of which is configured to receive the PWM signal output by the digital-to-analog conversion unit, and the other end of which is electrically connected with one end of the fifteenth resistor and one end of the sixth capacitor;
a fifteenth resistor, the other end of which is electrically connected with one end of the seventh capacitor and the positive input end of the second operational amplifier;
the other end of the sixth capacitor is grounded;
the other end of the seventh capacitor is grounded;
the negative input end of the second operational amplifier is electrically connected with the source electrode of the fourth MOS tube, and the output end of the second operational amplifier is electrically connected with one end of the sixteenth resistor;
a sixteenth resistor, the other end of which is electrically connected with the grid electrode of the third MOS tube;
the drain electrode of the third MOS tube is electrically connected with one end of the seventeenth resistor and one end of the nineteenth resistor, and the source electrode of the third MOS tube is electrically connected with the anode of the third diode;
a third diode, the cathode of which is electrically connected with one end of the twenty-third resistor, the drain electrode of the second MOS tube is configured to output an output current signal related to the second current domain;
The other end of the twenty-third resistor is grounded;
a seventeenth resistor, the other end of which is electrically connected with the power supply end;
a nineteenth resistor, the other end of which is electrically connected with the positive input end of the third operational amplifier;
the negative input end of the third operational amplifier is electrically connected with one end of the eighteenth resistor, and the output end of the third operational amplifier is electrically connected with one end of the twenty-first resistor;
the other end of the eighteenth resistor is electrically connected with the drain electrode of the fourth MOS tube and one end of the twentieth resistor;
the twentieth resistor is electrically connected with the power supply end at the other end;
the twenty-first resistor, the other end of the twenty-first resistor is connected with the grid electrode of the fourth MOS tube;
the source electrode of the fourth MOS tube is electrically connected with one end of the twenty-second resistor;
and the other end of the twenty-second resistor is grounded.
10. The apparatus of claim 1, further comprising a first circuit board and a second circuit board mated with each other, the signal conversion module being disposed on the first circuit board, the analog-to-digital conversion module and the control module being disposed on the second circuit board;
The first circuit board is also provided with a plurality of second pull-up resistors, one ends of the second pull-up resistors are respectively and electrically connected with the power supply end, and the other ends of the second pull-up resistors are respectively configured as module identification output ends;
the second circuit board is also provided with a plurality of matching parts which are respectively matched with the plurality of module identification output ends, and the plurality of matching parts are insulation parts and/or grounding parts; and
the control module is further configured to obtain the module identification output by the module identification output to determine the signal conversion module.
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| CN217037165U (en) * | 2021-12-30 | 2022-07-22 | 商丘德凯信息科技有限公司 | Intelligent information transmission system |
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| WO2016118674A1 (en) * | 2015-01-22 | 2016-07-28 | La Grou John Howard | Multi-path, series-switched, passively-summed digital-to-analog converter |
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| CN116719266A (en) | 2023-09-08 |
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Denomination of invention: control equipment Granted publication date: 20231103 Pledgee: Ningbo Tongshang Bank Co.,Ltd. Hangzhou Branch Pledgor: ZHEJIANG GUOLI XIN'AN TECHNOLOGY Co.,Ltd. Registration number: Y2024330000980 |