CN212255471U - Data transmission circuit for visual monitoring machine room - Google Patents
Data transmission circuit for visual monitoring machine room Download PDFInfo
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- CN212255471U CN212255471U CN202020732129.2U CN202020732129U CN212255471U CN 212255471 U CN212255471 U CN 212255471U CN 202020732129 U CN202020732129 U CN 202020732129U CN 212255471 U CN212255471 U CN 212255471U
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Abstract
The utility model discloses a data transmission circuit for visual control computer lab, include: the system comprises a voltage signal conditioning circuit, a current signal conditioning circuit, an A/D conversion circuit, a single chip microcomputer U1 and a wireless communication circuit, wherein the input ends of the voltage signal conditioning circuit and the current signal conditioning circuit respectively receive signals collected by a voltage sensor and a current sensor arranged on equipment in a machine room of a dispatching center, the output ends of the voltage signal conditioning circuit and the current signal conditioning circuit are respectively connected with the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected with the input end of the single chip microcomputer U1, and the output end of the single chip microcomputer U1 is connected with a background control center through the wireless communication circuit; the utility model discloses signal after voltage signal conditioning circuit, current signal conditioning circuit handle can realize the reliable transmission of equipment voltage, electric current in the computer lab, and response speed is fast, stability is good.
Description
Technical Field
The utility model discloses data transmission's technical field, concretely relates to data transmission circuit for visual control computer lab.
Background
The control data center is an infrastructure of a power grid data center and is a core brain for guaranteeing safe and stable operation of a power grid, and in recent years, along with large-scale construction of the power grid, corresponding automation systems and data grid models are increasingly large, and system nodes, equipment and manufacturers are increasing. The interactions and connections between the various devices and applications form a complex network of criss-cross relationships. The equipment applications in each area of the power grid dispatching data center are closely connected, and when any equipment fails, the service application interacting with the equipment possibly has cascading failure, so that the normal operation of a service system is influenced, and the system can be seriously paralyzed.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the deficiencies in the prior art, the technical problem who solves is: the data transmission circuit can condition voltage and current signals of each device, reduce signal interference and is used for visually monitoring a machine room.
In order to solve the technical problem, the utility model discloses a technical scheme be: a data transmission circuit for visually monitoring a machine room, comprising: the intelligent dispatching control system comprises a voltage signal conditioning circuit, a current signal conditioning circuit, an A/D conversion circuit, a single chip microcomputer U1 and a wireless communication circuit, wherein the input ends of the voltage signal conditioning circuit and the current signal conditioning circuit respectively receive signals collected by a voltage sensor and a current sensor arranged on equipment in a machine room of a dispatching center, the output ends of the voltage signal conditioning circuit and the current signal conditioning circuit are respectively connected with the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected with the input end of the single chip microcomputer U1, and the output end of the single chip microcomputer U1 is connected with a background control center through the wireless communication circuit.
Preferably, the voltage signal conditioning circuit comprises a linear optical coupling chip U2 and an amplifier P1, a VDD1 terminal of the linear optical coupling chip U2 is serially connected with a capacitor C1 and then grounded, a connection line between a VDD1 terminal of the linear optical coupling chip U2 and a capacitor C1 is connected with a 5V power supply terminal, an IN + terminal of the linear optical coupling chip U2 is respectively connected with one end of a sliding rheostat RP1 and one end of a capacitor C2, the other terminal of a capacitor C2 is respectively connected with one terminal of a resistor R2, an IN-terminal of the linear optical coupling chip U2, a GND1 terminal of the linear optical coupling chip U2 and a ground terminal, the other terminal of a resistor R2 is respectively connected with the other terminal of the sliding rheostat RP1, a sliding terminal of the sliding rheostat RP1 and one terminal of a resistor R1, the other terminal of the resistor R1 is connected with a voltage sensor arranged on a device IN the dispatching center machine room, a connection line between the VDD terminal 1 of the linear optical coupling chip U1 and the capacitor C365 is connected with a connection line of the capacitor C36, the VOUT-end of the linear optocoupler chip U2 is connected in series with a resistor R4 and then is connected with the non-inverting input end of an amplifier P1, a connecting line between the resistor R4 and the non-inverting input end of the amplifier P1 is connected in series with a resistor R7 and then is connected with the output end of the amplifier P1 and the sliding end of a sliding rheostat RP2 respectively, a capacitor C4 is connected in parallel with the two ends of a resistor R7, the output end of the amplifier P1 is connected in series with the sliding rheostat RP2 and then is connected with the Vx end of a singlechip U1, the VOUT + end of the linear optocoupler chip U2 is connected in series with a resistor R5 and then is connected with the inverting input end of the amplifier P1, and a connecting line between.
Preferably, the current signal conditioning circuit includes an amplifier P2, a non-inverting input terminal of the amplifier P2 is connected to one end of a resistor R9 and one end of a capacitor C5, the other end of the capacitor C5 is connected to one end of a resistor R8 and then grounded, the other end of the resistor R8 is connected to the other end of a resistor R9, a connection line between the resistor R8 and the resistor R9 is connected to a current sensor arranged in a device in the dispatching center machine room, an inverting input terminal of the amplifier P2 is connected to the output terminal of the amplifier P2 after being sequentially connected to the resistor R10 and the capacitor C6 in series, the resistor R11 is connected to both ends of the inverting input terminal and the output terminal of the amplifier P2 in parallel, the output terminal of the amplifier P1 is connected to the Vx terminal of the single chip U1, a connection line between the output terminal of the amplifier P1 and the Vx terminal of the single chip U1 is connected to the negative electrode of a zener.
Preferably, the a/D conversion circuit includes an a/D conversion chip U3, a low voltage reference chip U4 and a slide rheostat RP3, the Q3 end of the a/D conversion chip U3 is connected to the P1.0 end of the single chip microcomputer U2, the Q2 end of the a/D conversion chip U3 is connected to the P1.1 end of the single chip microcomputer U2, the Q3 end of the a/D conversion chip U3 is connected to the P1.2 end of the single chip microcomputer U3, the Q3 end of the a/D conversion chip U3 is connected to the P1.3 end of the single chip microcomputer U3, the DS3 end of the a/D conversion chip U3 is connected to the P1.4 end of the single chip microcomputer U3, the DS3 end of the a/D conversion chip U3 is connected to the P1.5 end of the single chip microcomputer U3, the DS3 end of the a/D conversion chip U3 is connected to the P1.6 end of the single chip microcomputer U3, the end of the single chip U3 is connected to the post-D conversion chip U3, the post-D conversion chip U3 end of the single chip microcomputer U3 is connected to the P1.3 end of the single chip microcomputer U3, and the post-D conversion, the VDD end of the A/D conversion chip U3 is connected with one end of a capacitor C7 and a power supply end of +5V respectively, the other end of the capacitor C7 is connected with the VSS end of the A/D conversion chip U3 and one end of the capacitor C8 respectively, the other end of the capacitor C8 is connected with the power supply end of-5V, the VR end of the A/D conversion chip U3 is connected with the sliding end of a sliding rheostat RP3, one end of the sliding rheostat RP3 is connected with the V0 end of a low-voltage reference chip U4, and the GND end of the A/D conversion chip U3 is connected with the GND end of the low-voltage reference chip U4.
Preferably, the wireless communication circuit includes a wireless communication chip U5, a PWR _ UP terminal of the wireless communication chip U5 is connected to a P2.4 terminal of a single chip U2, a PXEN terminal of the wireless communication chip U5 is connected to a P2.3 terminal of a single chip U2, a CS terminal of the wireless communication chip U5 is connected to a P2.2 terminal of a single chip U2, a DIN terminal of the wireless communication chip U5 is connected to a P2.1 terminal of a single chip U2, a DOUT terminal of the wireless communication chip U5 is connected to a P2.0 terminal of the single chip U5, an XC 5 terminal of the wireless communication chip U5 is connected in series to a capacitor C5 and then grounded, a resistor R5 is connected in parallel to an XC 5 terminal of the wireless communication chip U5 and a VCO resistor R5 is connected to a VCO 5 terminal of the wireless communication chip U5 and a VCO 72 terminal PF communication chip U5 is connected to a wireless communication terminal of the wireless communication chip U5 and a VCO 3 One end of a capacitor C18, one end of a capacitor C17, and a VSS4 end of the wireless communication chip U5 are connected, the other end of the capacitor C18 is connected in series with a resistor R13 and then is connected to the other end of a capacitor C17 and a FILT1 end of the wireless communication chip U5, an ANT2 end of the wireless communication chip U5 is connected to one end of a capacitor C14, one end of a capacitor C15, one end of an inductor L15, and one end of an inductor L15, the other end of the capacitor C15 is grounded, the other end of the capacitor C15 is connected to the ANT 15 end of the wireless communication chip U15, one end of the capacitor C15, the other end of the inductor L15, and one end of the inductor L15, the other end of the capacitor C15 is grounded, the other end of the inductor L15 is connected in series with the capacitor C15 and then is grounded, and a connection line between the capacitor C15 is connected to the antenna.
Preferably, the model of the single chip microcomputer U1 is AT89C 51.
Preferably, the model of the linear optical coupling chip U2 is HCPL-7840, and the models of the amplifier P1 and the amplifier P1 are AD 8607.
Preferably, the amplifier P2 is model LM 358.
Preferably, the model of the A/D conversion chip U3 is MC14433, and the model of the low-voltage reference chip U4 is MC 1403.
Preferably, the model of the wireless communication chip U5 is NRF 401.
Compared with the prior art, the utility model following beneficial effect has:
the utility model discloses the voltage sensor who sets up on the equipment in the dispatch center computer lab, the signal that current sensor gathered transmits to voltage signal conditioning circuit respectively, current signal conditioning circuit, voltage signal conditioning circuit, current signal conditioning circuit is respectively to voltage signal, send to singlechip U1 through AD converting circuit after the current signal processing, singlechip U1 through wireless communication circuit with signal transmission after handling to backstage control center, be convenient for the monitoring and the investigation of follow-up equipment state, through voltage signal conditioning circuit, the signal after the current signal conditioning circuit handles, can realize the equipment voltage in the computer lab, the reliable transmission of electric current, response speed is fast, good stability.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a circuit diagram of the present invention;
FIG. 2 is a schematic circuit diagram of the medium voltage signal conditioning circuit of the present invention;
fig. 3 is a schematic circuit diagram of the medium current signal conditioning circuit of the present invention;
FIG. 4 is a schematic circuit diagram of the A/D converter circuit and the wireless communication circuit of the present invention;
in the figure: the circuit comprises a voltage signal conditioning circuit 1, a current signal conditioning circuit 2, an A/D conversion circuit 3 and a wireless communication circuit 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, a data transmission circuit for visually monitoring a machine room includes: the intelligent dispatching control system comprises a voltage signal conditioning circuit 1, a current signal conditioning circuit 2, an A/D conversion circuit 3, a single chip microcomputer U1 and a wireless communication circuit 4, wherein the input ends of the voltage signal conditioning circuit 1 and the current signal conditioning circuit 2 respectively receive signals collected by a voltage sensor and a current sensor arranged on equipment in a dispatching center machine room, the output ends of the voltage signal conditioning circuit 1 and the current signal conditioning circuit 2 are respectively connected with the input end of the A/D conversion circuit 3, the output end of the A/D conversion circuit 3 is connected with the input end of the single chip microcomputer U1, and the output end of the single chip microcomputer U1 is connected with a background control center through the wireless communication circuit 4.
The utility model discloses the voltage sensor who sets up on the equipment in the dispatch center computer lab, the signal that current sensor gathered transmits to voltage signal conditioning circuit 1 respectively, current signal conditioning circuit 2, voltage signal conditioning circuit 1, current signal conditioning circuit 2 is respectively to voltage signal, send to singlechip U1 through AD converting circuit 3 after the current signal processing, singlechip U1 passes through signal transmission after wireless communication circuit 4 will be handled to backstage control center, be convenient for follow-up equipment state's monitoring and investigation, through voltage signal conditioning circuit 1, the signal after current signal conditioning circuit 2 handles, can realize the equipment voltage in the computer lab, the reliable transmission of electric current, response speed is fast, good stability.
Further, as shown IN fig. 2, the voltage signal conditioning circuit 1 includes a linear optical coupler chip U2 and an amplifier P1, the model of the linear optical coupler chip U2 is HCPL-7840, the model of the amplifier P1 is AD8607, the VDD1 end of the linear optical coupler chip U2 is serially connected with a capacitor C1 and then grounded, a connection line between the VDD1 end of the linear optical coupler chip U2 and the capacitor C1 is connected with a 5V power supply terminal, the IN + end of the linear optical coupler chip U2 is respectively connected with one end of a sliding rheostat RP1 and one end of a capacitor C2, the other end of the capacitor C2 is respectively connected with one end of a resistor R2, the IN-end of the linear optical coupler chip U2, the GND1 end of the linear optical coupler chip U2 and a ground terminal, the other end of a resistor R2 is respectively connected with the other end of a sliding rheostat RP1, a sliding end of a sliding rheostat RP1 and one end of a resistor R1, and the other end of a resistor R1 is connected with, the VDD2 end of the linear optocoupler chip U2 is connected with a capacitor C3 in series and then grounded, a connecting line between the VDD2 end of the linear optocoupler chip U2 and the capacitor C3 is connected with a 5V power supply end, the VOUT-end of the linear optocoupler chip U2 is connected with a resistor R4 in series and then connected with the non-inverting input end of an amplifier P1, a connecting line between a resistor R4 and the non-inverting input end of an amplifier P1 is connected with a resistor R7 in series and then connected with the output end of an amplifier P1 and the sliding end of a sliding rheostat RP2 respectively, the capacitor C4 is connected with two ends of a resistor R7 in parallel, the output end of the amplifier P1 is connected with a Vx end of a singlechip U1 in series and then connected with a sliding rheostat RP2, the VOUT + end of the linear optocoupler chip U2 is connected with the serial resistor R5 and then connected with the inverting input end; specifically, the amplifier P1 with the model number of AD8607 has the advantages of stable performance, high reliability, long service life, small volume, light weight and low power consumption, and improves the input signal level to better match the range of the a/D conversion circuit 3, thereby improving the measurement accuracy and sensitivity; the linear optocoupler chip U2 with the model of HCPL-7840 has an amplification function of an internal input circuit, is input with high impedance, can not transmit a voltage signal really, outputs a signal serving as a differential input signal of a post-stage operational amplifier P1, has about 1000-time voltage amplification factor, is matched with an amplifier P1 for use, can amplify a weak voltage signal acquired by a voltage sensor,
further, as shown in fig. 3, the current signal conditioning circuit 2 includes an amplifier P2, the amplifier P2 is model LM358, the non-inverting input end of the amplifier P2 is connected with one end of a resistor R9 and one end of a capacitor C5 respectively, the other end of the capacitor C5 is connected with one end of a resistor R8 and then grounded, the other end of the resistor R8 is connected with the other end of a resistor R9, a connecting line between the resistor R8 and the resistor R9 is connected with a current sensor arranged on equipment in a dispatching center machine room, the inverting input end of the amplifier P2 is sequentially connected with a resistor R10 and a capacitor C6 in series and then connected with the output end of the amplifier P2, a resistor R11 is connected with the inverting input end of the amplifier P2 and the two ends of the output end in parallel, the output end of the amplifier P1 is connected with the Vx end of the singlechip U1, a connecting line between the output end of the amplifier P1 and the Vx end of the singlechip U1 is connected with the negative electrode of a; specifically, the amplifier P2 with the model LM358 has a dual operational amplifier with high gain and internal frequency compensation, and the current signal conditioning circuit 2 adopts an in-phase amplifier circuit, and has the characteristics of high input impedance, low output impedance and strong high-frequency interference resistance, and can effectively process signals acquired by a current sensor arranged on equipment in a dispatching center machine room.
Further, as shown in fig. 4, the a/D conversion circuit 3 includes an a/D conversion chip U3, a low voltage reference chip U4, and a slide rheostat RP3, the a/D conversion chip U3 is MC14433, the low voltage reference chip U4 is MC1403, the single chip U1 is AT89C51, the Q3 of the a/D conversion chip U3 is connected to the P1.0 of the single chip U2, the Q2 of the a/D conversion chip U3 is connected to the P1.1 of the single chip U2, the Q1 of the a/D conversion chip U3 is connected to the P1.2 of the single chip U2, the Q2 of the a/D conversion chip U2 is connected to the P1.3 of the U2, the DS2 of the a/D conversion chip U2 is connected to the P1.4 of the single chip U2, the DS2 of the a/D conversion chip U2 is connected to the P1.3 of the single chip U2, and the DS2 of the single chip U2 is connected to the P1.6 of the single chip U2, the DS4 end of the A/D conversion chip U3 is connected with the P1.7 end of the singlechip U2, the EOC end of the A/D conversion chip U3 is connected with the DU end of the A/D conversion chip U3 and then is connected with the P3.2 end of the singlechip U2, the VDD end of the A/D conversion chip U3 is respectively connected with one end of a capacitor C7 and a power supply end of +5V, the other end of the capacitor C7 is respectively connected with the VSS end of the A/D conversion chip U3, one end of a capacitor C8 is connected, the other end of the capacitor C8 is connected with a power supply end of-5V, a VR end of an A/D conversion chip U3 is connected with a sliding end of a sliding rheostat RP3, one end of the sliding rheostat RP3 is connected with a V0 end of a low-voltage reference chip U4, a GND end of the A/D conversion chip U3 is connected with a GND end of the low-voltage reference chip U4, an A/D conversion chip U1 with the model of MC14433 is adopted, and the anti-interference performance is high, and the automatic polarity conversion function is achieved; the output voltage of a low-voltage reference chip with the model of MC1403 is 2.475V-2.525V, the minimum input voltage is 4.5V (4.5-15V) 3mV, the load regulation rate is 0-10 mA, and the low-voltage reference chip has the characteristics of small temperature coefficient, small noise, large input voltage range and good stability, and when the input voltage is changed from + 4.5V to +15V, the variation of the output voltage value is less than 3 mV;
further, the wireless communication circuit 4 includes a wireless communication chip U5, the wireless communication chip U5 is NRF401, the PWR _ UP terminal of the wireless communication chip U5 is connected to the P2.4 terminal of the single chip microcomputer U2, the PXEN terminal of the wireless communication chip U5 is connected to the P2.3 terminal of the single chip microcomputer U2, the CS terminal of the wireless communication chip U5 is connected to the P2.2 terminal of the single chip microcomputer U5, the DIN terminal of the wireless communication chip U5 is connected to the P2.1 terminal of the single chip microcomputer U5, the DOUT terminal of the wireless communication chip U5 is connected to the P2.0 terminal of the single chip microcomputer U5, the XC 5 terminal of the wireless communication chip U5 is connected in series to the C5 terminal of the single chip microcomputer U5 and then grounded, the XC 5 terminal of the wireless communication chip U5 is connected in series to the C5 terminal of the wireless communication chip U5 and then connected to the ground terminal of the VCO chip U5, the XC 5 terminal of the wireless communication chip U5, the VCO chip R5 is connected in series to the XC 5 terminal of the VCO 5, the VCO chip PF terminal of the wireless communication chip U5, and the wireless communication chip U5, the VCO chip U5, One end of a capacitor C18, one end of a capacitor C17, and a VSS4 end of a wireless communication chip U5 are connected, the other end of a capacitor C18 is connected in series with a resistor R13 and then is connected with the other end of a capacitor C17 and a FILT1 end of a wireless communication chip U5, an ANT2 end of the wireless communication chip U5 is connected with one end of a capacitor C14, one end of a capacitor C15, one end of an inductor L15, and one end of an inductor L15, the other end of the capacitor C15 is grounded, the other end of the capacitor C15 is connected in series with the ANT 15 end of the wireless communication chip U15, one end of the capacitor C15, the other end of the inductor L15, and one end of the inductor L15, the other end of the capacitor C15 is grounded, the other end of the inductor L15 is connected in series with the capacitor C15 and then is grounded, and a connecting line between the capacitor C15 is connected with an antenna; the wireless communication chip U5 is connected with a background control center, voltage and current signals collected by the voltage signal conditioning circuit 1 and the current signal conditioning circuit 2 are received by the singlechip U1 and are sent to the wireless communication chip U3, and a worker observes the voltage and current conditions of each device in the device room by using the background control center; the wireless communication circuit 4 is an existing module, and the specific wireless transmission process thereof is not described herein.
The utility model relates to a data transmission circuit for visual control computer lab, voltage signal conditioning circuit 1, current signal conditioning circuit 2 handle through the signal that gathers voltage sensor, current sensor, send to singlechip U1 through AD converting circuit 3, and singlechip U1 sends the signal after handling to backstage control center through wireless communication circuit 4, has that the interference killing feature is strong, the characteristics of high reliability.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A data transmission circuit for visually monitoring a machine room is characterized in that: the method comprises the following steps: the intelligent dispatching control system comprises a voltage signal conditioning circuit, a current signal conditioning circuit, an A/D conversion circuit, a single chip microcomputer U1 and a wireless communication circuit, wherein the input ends of the voltage signal conditioning circuit and the current signal conditioning circuit respectively receive signals collected by a voltage sensor and a current sensor arranged on equipment in a machine room of a dispatching center, the output ends of the voltage signal conditioning circuit and the current signal conditioning circuit are respectively connected with the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected with the input end of the single chip microcomputer U1, and the output end of the single chip microcomputer U1 is connected with a background control center through the wireless communication circuit.
2. The data transmission circuit for visually monitoring the machine room according to claim 1, wherein: the voltage signal conditioning circuit comprises a linear optical coupling chip U2 and an amplifier P1, wherein a VDD1 end of the linear optical coupling chip U2 is connected with a capacitor C1 IN series and then grounded, a connecting line between a VDD1 end of the linear optical coupling chip U2 and the capacitor C1 is connected with a 5V power supply end, an IN + end of the linear optical coupling chip U2 is respectively connected with one end of a sliding rheostat RP1 and one end of a capacitor C2, the other end of a capacitor C2 is respectively connected with one end of a resistor R2, an IN-end of the linear optical coupling chip U2, a GND1 end of the linear optical coupling chip U2 and a ground end, the other end of a resistor R2 is respectively connected with the other end of a sliding rheostat RP1, a sliding end of the sliding rheostat 36RP 72 and one end of a resistor R1, the other end of the resistor R1 is connected with a voltage sensor arranged on equipment IN a dispatching center machine room, a 1 end of the linear optical coupling chip U1 is connected with a connecting line between the capacitor C1 and then grounded, the VOUT-end of the linear optocoupler chip U2 is connected in series with a resistor R4 and then is connected with the non-inverting input end of an amplifier P1, a connecting line between the resistor R4 and the non-inverting input end of the amplifier P1 is connected in series with a resistor R7 and then is connected with the output end of the amplifier P1 and the sliding end of a sliding rheostat RP2 respectively, a capacitor C4 is connected in parallel with the two ends of a resistor R7, the output end of the amplifier P1 is connected in series with the sliding rheostat RP2 and then is connected with the Vx end of a singlechip U1, the VOUT + end of the linear optocoupler chip U2 is connected in series with a resistor R5 and then is connected with the inverting input end of the amplifier P1, and a connecting line between.
3. The data transmission circuit for visually monitoring the machine room according to claim 1, wherein: the current signal conditioning circuit comprises an amplifier P2, the non-inverting input end of the amplifier P2 is connected with one end of a resistor R9 and one end of a capacitor C5 respectively, the other end of the capacitor C5 is connected with one end of a resistor R8 and then grounded, the other end of the resistor R8 is connected with the other end of a resistor R9, a connecting line between the resistor R8 and the resistor R9 is connected with a current sensor arranged on equipment in a dispatching center machine room, the inverting input end of the amplifier P2 is connected with the resistor R10 and the capacitor C6 in series in sequence and then connected with the output end of the amplifier P2, the resistor R11 is connected with the inverting input end and the two ends of the output end of the amplifier P2 in parallel, the output end of the amplifier P1 is connected with the Vx end of the singlechip U1, a connecting line between the output end of the amplifier P1 and the Vx end of the singlechip U5 is connected with the negative electrode of.
4. The data transmission circuit for visually monitoring the machine room according to claim 1, wherein: the A/D conversion circuit comprises an A/D conversion chip U3, a low-voltage reference chip U4 and a slide rheostat RP3, wherein the end Q3 of the A/D conversion chip U3 is connected with the end P1.0 of the singlechip U2, the end Q2 of the A/D conversion chip U3 is connected with the end P1.1 of the singlechip U2, the end Q3 of the A/D conversion chip U3 is connected with the end P1.2 of the singlechip U3, the end Q3 of the A/D conversion chip U3 is connected with the end P1.3 of the singlechip U3, the end DS3 of the A/D conversion chip U3 is connected with the end P1.4 of the singlechip U3, the end DS3 of the A/D conversion chip U3 is connected with the end P1.5 of the U3, the end DS3 of the A/D conversion chip U3 is connected with the end P1.6 of the singlechip U3, the end DS3 of the A/D conversion chip U3 is connected with the end P1.5 of the singlechip U3, and the end DU 72 of the end A/D conversion chip 72 is connected with the end P3 of the end of the singlechip U3, and the end DU 72 of the end A/D conversion chip 72, the VDD end of the A/D conversion chip U3 is connected with one end of a capacitor C7 and a power supply end of +5V respectively, the other end of the capacitor C7 is connected with the VSS end of the A/D conversion chip U3 and one end of the capacitor C8 respectively, the other end of the capacitor C8 is connected with the power supply end of-5V, the VR end of the A/D conversion chip U3 is connected with the sliding end of a sliding rheostat RP3, one end of the sliding rheostat RP3 is connected with the V0 end of a low-voltage reference chip U4, and the GND end of the A/D conversion chip U3 is connected with the GND end of the low-voltage reference chip U4.
5. The data transmission circuit for visually monitoring the machine room according to claim 1, wherein: the wireless communication circuit comprises a wireless communication chip U5, a PWR _ UP end of the wireless communication chip U5 is connected with a P2.4 end of a singlechip U2, a PXEN end of the wireless communication chip U5 is connected with a P2.3 end of a singlechip U2, a CS end of the wireless communication chip U5 is connected with a P2.2 end of a singlechip U2, a DIN end of the wireless communication chip U2 is connected with a P2.1 end of the singlechip U2, a DOUT end of the wireless communication chip U2 is connected with a P2.0 end of the singlechip U2, an XC2 end of the wireless communication chip U2 is connected with a capacitor C2 in series and then grounded, an XC2 end of the wireless communication chip U2 is connected with the capacitor C2 in series and then grounded, a resistor R2 is connected between the XC2 end of the wireless communication chip U2 and an XC2 end of the VCO2, a crystal oscillator X2 is connected with two ends of the VCO2, an L2 end of the wireless communication chip U2 is connected with a wireless communication chip PF end of the VCO2, and a wireless communication chip PF end of the VCO2 are connected with a wireless, One end of a capacitor C17 is connected to a VSS4 end of the wireless communication chip U5, the other end of the capacitor C18 is connected to a resistor R13 in series and then connected to the other end of the capacitor C17 and a FILT1 end of the wireless communication chip U5, an ANT2 end of the wireless communication chip U5 is connected to one end of a capacitor C14, one end of a capacitor C15, one end of an inductor L3 and one end of an inductor L1 respectively, the other end of the capacitor C14 is grounded, the other end of the capacitor C15 is connected to an ANT 15 end of the wireless communication chip U15, one end of a capacitor C15, the other end of the inductor L15 and one end of the inductor L15 are grounded, the other end of the inductor L15 is connected to ground after being connected to the capacitor C15 in series, and a connection line between the capacitor C15 and the antenna is connected to the antenna.
6. The data transmission circuit for visually monitoring the machine room according to claim 1, wherein: the model of the single chip microcomputer U1 is AT89C 51.
7. The data transmission circuit for visually monitoring the machine room according to claim 2, wherein: the model of the linear optical coupling chip U2 is HCPL-7840, and the models of the amplifier P1 and the amplifier P1 are AD 8607.
8. The data transmission circuit for visually monitoring the machine room according to claim 3, wherein: the amplifier P2 is LM 358.
9. The data transmission circuit for visually monitoring the machine room according to claim 4, wherein: the model of the A/D conversion chip U3 is MC14433, and the model of the low-voltage reference chip U4 is MC 1403.
10. The data transmission circuit for visually monitoring the machine room according to claim 5, wherein: the model of the wireless communication chip U5 is NRF 401.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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