CN208537976U - Air compressor monitoring device in weather radar station - Google Patents

Abstract

The utility model discloses the air compressor monitoring devices in a kind of weather radar station, including voltage detecting system, condition detecting system, master controller, communication chip and attention display, the signal input part of voltage detecting system is electrically connected with the power end of air compressor, the signal output end of voltage detecting system is electrically connected with the end Spi of air compressor, the signal input part of condition detecting system is electrically connected with the pressure detecting port of air compressor and Humidity Detection port respectively, the signal output end of condition detecting system is electrically connected with the channel AD of master controller, the control signal output of master controller is electrically connected with attention display, the end UART1 of master controller is electrically connected with communication chip.The utility model accurately detects air compressor data using isolation comparator and AD acquisition mode, does not need to introduce external power supply, and increases air compressor energization, power-off monitoring, the RS485 mode of use and upper host communication.

Description

Air compressor monitoring device in weather radar station

Technical field

The utility model relates to the air compressors in data monitoring field more particularly to a kind of weather radar station to monitor dress It sets.

Background technique

In Weather radar system, waveguide is used to transmit uhf electromagnetic wave, can be with pole by its pulse signal Small loss is sent to destination.The size of waveguide bore is different because of the wavelength of transmitted signal.Waveguide is in circuit The characteristic of high-pass filter is presented: the signal of cutoff frequency or more being allowed to pass through, and cutoff frequency signal below is then prevented from Or decaying, waveguide directly affect the performance of radar.

It is most of at this stage all by air compressor come indirect monitoring waveguide internal environment situation.Air compressor shape The state monitoring handset monitoring moisture condition of air compressor, pressure state and it start and stop state, air is compressed Machine has carried out comprehensive real time monitoring, understands waveguide internal environment situation.It is most important to monitoring waveguide.

In current weather radar station to the voltage that the monitoring method of air compressor is external conveying 28v be connected to pressure and Humidity port carries out on off test, and the voltage detecting of pressure and humidity port both ends is carried out according to the state of current compressor.

Compressor can be damaged if maintenance personnel's misoperation using outside conveying 28v voltage schemes, increases compression The risk of damage of machine, expression mode is presented as illuminating and extinguishing for local led in detection scheme, and this mode is too simple, nothing Method tests the power on/off situation of air compressor itself and realizes the state of distal side monitoring air compressor, this detection scheme is complete The pressure and humidity detection port, other equipment for occupying test air compressor offer can not again couple parallel, if Other equipment connection, this detection device can not normally provide alarm condition.

Utility model content

The purpose of this utility model is that the air pressure provided in a kind of weather radar station to solve the above-mentioned problems Contracting machine monitoring device.

The utility model achieves the above object through the following technical schemes:

A kind of air compressor monitoring device in weather radar station, including it is voltage detecting system, condition detecting system, total Controller, communication chip and attention display, the electricity of the signal input part of the voltage detecting system and the air compressor Source electrical connection, the signal output end of the voltage detecting system are electrically connected with the end Spi of the air compressor, the state The signal input part of detection system is electrically connected with the pressure detecting port of the air compressor and Humidity Detection port respectively, institute The signal output end for stating condition detecting system is electrically connected with the channel AD of the master controller, the control signal of the master controller Output end is electrically connected with the attention display, and the end UART1 of the master controller is electrically connected with the communication chip.

Specifically, the voltage detecting system includes current transformer and electric power detection chip, and the current transformer is set It sets at the power end of the air compressor, the letter of the signal output end of the current transformer and the electric power detection chip Number input terminal, the signal output end of the electric power detection chip are electrically connected with the end Spi of the master controller.

Specifically, the condition detecting system includes four isolation comparators, and the signal of two isolation comparators is defeated Enter end be electrically connected with the pressure detecting port of the air compressor, two it is described be isolated comparator signal output ends with it is described The channel AD of master controller is electrically connected；

The Humidity Detection port of the signal input part and the air compressor of other two isolation comparator is electrically connected It connects, the signal output end of two isolation comparators is electrically connected with the channel AD of the master controller.

Preferably, model Stm8s208c8, the model tlc2531 of the isolation comparator of the master controller, The model RS485 bus chip of the communication chip, the attention display are double-colored optical diode.

The utility model has the beneficial effects that:

Air compressor monitoring device in the utility model weather radar station uses isolation comparator and AD acquisition mode, Air compressor data are accurately detected, do not need to introduce external power supply, and increases air compressor and is powered, powers off monitoring, The RS485 mode of use and upper host communication, increase network function, then the remote computer prison of air compressor may be implemented Control and monitoring mobile phone.

Detailed description of the invention

Fig. 1 is the structural block diagram of the air compressor monitoring device in weather radar station described in the utility model.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing:

As shown in Figure 1, the air compressor monitoring device in a kind of weather radar station of the utility model, including voltage detecting System, condition detecting system, master controller, communication chip and attention display, the signal input part and sky of voltage detecting system The power end of air compressor is electrically connected, and the signal output end of voltage detecting system is electrically connected with the end Spi of air compressor, state The signal input part of detection system is electrically connected with the pressure detecting port of air compressor and Humidity Detection port respectively, state inspection The signal output end of examining system is electrically connected with the channel AD of master controller, the control signal output and alarm indication of master controller Device electrical connection, the end UART1 of master controller is electrically connected with communication chip.

Voltage detecting system includes current transformer and electric power detection chip, and air compressor is arranged in current transformer At power end, the signal output end of current transformer and the signal input part of electric power detection chip, the signal of electric power detection chip Output end is electrically connected with the end Spi of master controller.

Condition detecting system includes four isolation comparators, the signal input part and air compressor of two isolation comparators Pressure detecting port electrical connection, two isolation comparators signal output ends be electrically connected with the channel AD of master controller, in addition The signal input part of two isolation comparators is electrically connected with the Humidity Detection port of air compressor, the letter of two isolation comparators Number output end is electrically connected with the channel AD of master controller.

The pressure and moisture signal of air compressor are acquired more resulting signal by AD by isolation comparator Then channel transfer analyzes the received data arrived to master controller, master controller, data are passed by RS485 bus chip It is defeated into server, mobile phone or computer open environmental monitoring app or environmental monitoring webpage by network and can check and work as The current state of preceding compressor realizes the purpose of networking.

The switch state that air compressor is detected by current transformer, can flexibly detect the on-off of compressor itself State.

Each component is further described below:

One, master controller

Master controller stm8s208c8 is 8 MCU, up to 128KB flash memory, integrated EEPROM, 10 ADC, timing Device, 2 UART, SPI, I²The low-power chip of C, CAN.Its maximum feature is as follows:

1, kernel:

Highest fcpu frequency, up to 24MHz, 0 memory access waited as fcpu≤16MHz；

2, clock, reset and power management:

1) 2.95V to 5.5V operating voltage, Width funtion power supply

2) flexible clock control, 4 master clock sources

3) the clock safe-guard system of clock supervision is had

3, communication interface:

1) high speed 1Mbit/s CAN 2.0B interface

2) UART-LIN holotype with synchronised clock output

3) the compatible LIN2.1 agreement of UART, master/slave mode and automatic re-synchronization

4) SPI interface up to 10Mbit/s

5) I2C interface up to 400Kbit/s

4, the port I/O:

1) the GPIO foot with the output of high-selenium corn electric current

2) very strong GPIO design, there is very strong ability to bear to reverse irrigated current

5, timer

Other than the basic timing function with other cpu, there are also advanced control timer functions for it:

1) generate output waveform (output is compared, PWM and single pulse mode)

2) the corresponding interruption with different event (capture, compares, and overflows, and brake triggers)

3) synchronous with TIM5/TIM6 or external signal (external clock, reset signal, triggering and enable signal)

Advanced control timer is widely suitable in various control applications, including those need justified mode PWM Application, which supports complementary output and Power MOSFET.

The effect of master controller Stm8s208c8 is as follows:

1) data that isolation comparator obtains carry out data acquisition process by A/D module inside Stm8s208c8, obtain institute Need data.

2) facility information of this handset of environmental monitoring host modifications is stored in inside stm8s208c8 in eeprom.

3) electric power detection chip carries out data acquisition process by Spi module inside Stm8s208c8, data needed for obtaining.

4) master controller Stm8s208c8 internal independence house dog, monitoring operation, guarantees that handset is constantly in monitoring work State.

5) master controller Stm8s208c8 concurrently acts as the transmitting-receiving control processing work for doing handset data.

Two, comparator is isolated

When detecting the humidity and pressure acquisition of air compressor, it would be desirable in view of not introducing external voltage protection air Also it to allow the voltage of air compressor not enter in the product of oneself while compressor, our own detection is protected to set It is standby.So we have selected tlc2531 self-powered that comparator is isolated.

Comparator main feature is isolated in tlc2531:

1, isolation barrier isolation is intersected using self-powered

2, isolation voltage is up to 3000V (root-mean-square value)

3,2.5V isolation reference source is included, maximum load current Iload is 5mA

4, there is linear power to cross zero output

5, double input end comparator is included

6, there is high input impedance comparator

Three, communication chip

The network system being made up of using Modbus standard agreement RS485 bus.Air compressor state handset Bus portion using the scheme of " light-coupled isolation+RS485 bus chip ", both protected other equipment handset or protected oneself Mode.The communication quality of whole network is not influenced simultaneously.

The characteristics of Modbus standard agreement:

1) standard, opening, user can freely, relievedly use Modbus agreement, do not need to pay license fee, not yet It can piracy of intellectual property rights.Currently, the producer for supporting Modbus is more than 400, support that the product of Modbus is more than 600 kinds.

2) Modbus can support a variety of electric interfaces, such as RS-232, RS-485, can also pass on a variety of media It send, such as twisted pair, optical fiber, wireless.

3) frame format of Modbus is simple, compact, easy-to-understand.User, which uses, to be easy, and manufacturer's exploitation is simple.

RS485 interface standard feature:

1) electrical characteristic of RS485: logic " 1 " with the voltage difference of line-to-line is+(2-6) V indicates；Logic " 0 " is with two lines Between voltage difference be-(2-6) V indicate.Interface signal level ratio RS-232-C is reduced, and is just hardly damaged the core of interface circuit Piece, and the level is compatible with Transistor-Transistor Logic level, can facilitate and TTL circuit connection.

2) the data maximum transmission rate of RS-485 is 10Mbps.

3) RS-485 interface is the combination using balance driver and differential receiver, and anti-common mode does ability enhancing, i.e., anti- Noise jamming is good.

4) the maximum transmission distance standard value of RS-485 interface is 4000 feet, and actually up to 3000 meters, RS-485 is connect Mouth is to allow to connect up to 128 transceivers in bus.There is multistation ability, such user can use single RS- 485 interfaces easily set up device network.

5) RS-485 interface has many advantages, such as good noise immunity, long transmission range and multistation ability.

The limitation that the technical solution of the utility model is not limited to the above specific embodiments, all skills according to the present utility model The technology deformation that art scheme is made, each falls within the protection scope of the utility model.

Claims (4)

1. the air compressor monitoring device in a kind of weather radar station, it is characterised in that: examined including voltage detecting system, state Examining system, master controller, communication chip and attention display, the signal input part of the voltage detecting system and the air pressure The power end of contracting machine is electrically connected, and the signal output end of the voltage detecting system is electrically connected with the end Spi of the air compressor, The signal input part of the condition detecting system respectively with the pressure detecting port of the air compressor and Humidity Detection port Electrical connection, the signal output end of the condition detecting system are electrically connected with the channel AD of the master controller, the master controller Control signal output be electrically connected with the attention display, the end UART1 of the master controller and communication chip electricity Connection.

2. the air compressor monitoring device in weather radar station according to claim 1, it is characterised in that: the voltage Detection system includes current transformer and electric power detection chip, and the power supply of the air compressor is arranged in the current transformer At end, the signal input part of the signal output end of the current transformer and the electric power detection chip, the electric power detection core The signal output end of piece is electrically connected with the end Spi of the master controller.

3. the air compressor monitoring device in weather radar station according to claim 1, it is characterised in that: the state Detection system includes four isolation comparators, the pressure of the signal input part and the air compressor of two isolation comparators Power detects port electrical connection, and the signal output end of two isolation comparators is electrically connected with the channel AD of the master controller；

The signal input part of other two isolation comparator is electrically connected with the Humidity Detection port of the air compressor, and two The signal output end of a isolation comparator is electrically connected with the channel AD of the master controller.

4. the air compressor monitoring device in weather radar station according to claim 3, it is characterised in that: the master control The model Stm8s208c8 of device processed, the model tlc2531 of the isolation comparator, the model of the communication chip RS485 bus chip, the attention display are double-colored optical diode.