CN200959090Y

CN200959090Y - Programmable temperature and speed sensing controller

Info

Publication number: CN200959090Y
Application number: CN 200620035686
Authority: CN
Inventors: 袁维蓉; 王鹏
Original assignee: Sichuan Dongfeng Electric Machinery Works Co Ltd
Current assignee: Sichuan Dongfeng Electric Machinery Works Co Ltd
Priority date: 2006-09-25
Filing date: 2006-09-25
Publication date: 2007-10-10
Anticipated expiration: 2016-09-25

Abstract

The utility model discloses a programmable temperature and speed detecting controlling device, which comprises an programmable controller, a touch screen, one or a plurality of temperature sensors, a speed detecting fluted disc, a proximity switch, a communication module and a temperature detecting module. The programmable controller is separately connected with the touch screen and an upper computer through RS 232 cables and the communication module; the temperature sensor and the proximity switch are separately connected with the input unit of the programmable controller. The utility model has the advantage of being able to provide concentrated continuous procedure parameter monitoring over relatively physically concentrated multiple to be detected points in a main workshop; not only saves costs, but also comes in a high reliability with clear warning reason and position, facilitating a direct convenient operation.

Description

The programmable temperature and speed measuring control device

Technical field

The utility model relates to a kind of genset temperature and rotating speed measure and control device, particularly relates to a kind of genset programmable temperature and speed measuring control device.

Background technology

Genset is a kind of power equipment of a large amount of heatings, parts such as stator coil, thrust bearing, guide bearing can produce a large amount of heat energy, as detect and control the temperature rise of each critical piece of genset untimelyly, this not only can cause the unit fault, burn out genset, even also can cause disaster accident, power plant's property and personnel's life security are constituted significant threat.Simultaneously; behind the set grid-connection; in some small grids; the generator speed potentially unstable; when generator speed (is judged to " low speed " fault less than setting value during 46.5HZ～49.5HZ); after system's removal of load and protection tripping operation, the hydraulic turbine has little time to cut out water valve, and generator frequency (rotating speed) surpasses setting value and (is judged to " overrunning " fault during 55.0HZ～75.0HZ).No matter be low speed or overrun, all unfavorable to generator, therefore at present Detection ﹠ Controling systems such as generating unit speed, temperature, pressure, position, electric weight have all been set up in each power house, but existing system too disperses, cost is higher, information indicating and parameter are provided with not enough intuitive and convenient.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of programmable temperature and speed measuring control device is provided, this device adopts the procedure parameter continuous monitoring of concentrating to the measuring point that some physical locations in the main building are concentrated relatively, quantity is many, not only can save cost, and reliability is very high, the operation intuitive and convenient.

Goal of the invention of the present utility model is achieved through the following technical solutions: the programmable temperature and speed measuring control device, this device is by Programmable Logic Controller, touch-screen, one or more temperature sensors, speed measuring fluted disc, near switch, communication module and temperature measurement module are formed, Programmable Logic Controller is connected and swap data by the RS-232 cable with touch-screen, Programmable Logic Controller is connected with host computer by communication module, temperature sensor output is connected to the input block of Programmable Logic Controller through temperature measurement module, speed measuring fluted disc is installed on the generator shaft and with main shaft and rotates, be positioned at the speed measuring fluted disc next door near switch, deliver to the input block of Programmable Logic Controller near the pulse signal of switch output, the CPU (central processing unit) of Programmable Logic Controller is according to the digit pulse calculating generator group rotating speed of input, frequency, rotating speed number percent, and result of calculation is sent to screen displaying by the RS-232 cable.

Described temperature measurement module comprises that an A/D converter, one are used for whether the detected temperatures sensor opens circuit and the opening circuit and short-circuit detecting circuit of short circuit, A/D converter, opening circuit all is connected with temperature sensor with short-circuit detecting circuit, opens circuit to be connected with the input of A/D converter with the output of short-circuit detecting circuit.

Temperature sensor is a thermo-sensitive resistor.

Near switch is that the NPN type is near switch.

The data of Programmable Logic Controller and touch-screen exchange comprise alarm temperature, shutdown temperature, rotating speed, frequency, rotating speed number percent and open circuit and detect instruction, short-circuit detecting instruction.

When the measuring point temperature surpassed alarm temperature, Programmable Logic Controller sent alerting signal in the viewing area of touch-screen, and sends alerting signal by its output unit to host computer, takes cooling measure by host computer.

When the measuring point temperature surpassed shutdown temperature, Programmable Logic Controller sent stopping signal in the viewing area of touch-screen, and sends stopping signal by its output unit to host computer, takes the shutdown measure by host computer.

After Programmable Logic Controller detection genset was in lower-speed state, its output unit output low speed guard signal was to host computer.

After Programmable Logic Controller detection genset was in the state of overrunning, its output unit output overspeed protection signal was to host computer.

Advantage of the present utility model is: can adopt the procedure parameter continuous monitoring of concentrating to the measuring point that some physical locations in the main building are concentrated relatively, quantity is many, it is very high not only can to save cost, reliability, and the warning reason alert locations is cheer and bright, the operation intuitive and convenient.

Description of drawings

Fig. 1 the utility model composition frame chart

Fig. 2 thermometric process flow diagram

Fig. 3 process flow diagram that tests the speed

Embodiment

Further describe the technical solution of the utility model below in conjunction with accompanying drawing: as Fig. 1, the programmable temperature and speed measuring control device, by Programmable Logic Controller, touch-screen, one or more temperature sensors, speed measuring fluted disc, near switch, communication module and temperature measurement module are formed, Programmable Logic Controller is connected and swap data by the RS-232 cable with touch-screen, Programmable Logic Controller is connected with host computer by communication module, temperature sensor output is connected to the input block of Programmable Logic Controller through temperature measurement module, speed measuring fluted disc is installed on the generator shaft and with main shaft and rotates, be positioned at the speed measuring fluted disc next door near switch, deliver to the input block of Programmable Logic Controller near the pulse signal of switch output, the CPU (central processing unit) of Programmable Logic Controller is according to the digit pulse calculating generator group rotating speed of input, frequency, rotating speed number percent, and result of calculation is sent to screen displaying by the RS-232 cable.

Temperature sensor is a thermo-sensitive resistor.

Near switch is that the NPN type is near switch.

Fig. 2 is a thermometric process flow diagram of the present utility model.Among the figure; the CPU (central processing unit) operation of Programmable Logic Controller is stored in the watchdog routine in the storer; the temperature of each point for measuring temperature of circulatory monitoring; and with the alarm temperature that sets in advance relatively; if the Current Temperatures of certain point for measuring temperature is higher than its default alarm temperature; Programmable Logic Controller is sent to this temperature value on the touch-screen on the one hand and shows; the alarm relay action; by its output unit alerting signal is sent to host computer on the other hand; by host computer unit is implemented cooling control; next compare with shutdown temperature; if the Current Temperatures of certain point for measuring temperature is higher than its default shutdown temperature; Programmable Logic Controller is sent to this temperature value on the one hand and shows the shutdown message on the touch-screen; shut down the actuating of relay; also stopping signal is sent to host computer on the other hand, unit is implemented to shut down control, so all points for measuring temperature of circulatory monitoring by host computer by its output unit.

As Fig. 3, after Programmable Logic Controller detection genset was in lower-speed state, its output unit output low speed guard signal was to host computer; After perhaps Programmable Logic Controller detection genset was in the state of overrunning, its output unit output overspeed protection signal was taked corresponding measure to host computer by host computer.

Claims

1, the programmable temperature and speed measuring control device, it is characterized in that it is by Programmable Logic Controller, touch-screen, one or more temperature sensors, speed measuring fluted disc, near switch, communication module and temperature measurement module are formed, Programmable Logic Controller is connected by the RS-232 cable with touch-screen, Programmable Logic Controller is connected with outside host computer by communication module, temperature sensor is connected with the input block of Programmable Logic Controller through temperature measurement module, speed measuring fluted disc is installed on the generator shaft and with main shaft and rotates, be positioned at the speed measuring fluted disc next door near switch, deliver to the input block of Programmable Logic Controller near the pulse signal of switch output, the CPU (central processing unit) of Programmable Logic Controller is according to the digit pulse calculating generator group rotating speed of input, frequency, rotating speed number percent.

2, programmable temperature and speed measuring control device according to claim 1, it is characterized in that: described temperature measurement module comprises that an A/D converter, one are used for whether the detected temperatures sensor opens circuit and the opening circuit and short-circuit detecting circuit of short circuit, A/D converter, opening circuit all is connected with temperature sensor with short-circuit detecting circuit, opens circuit to be connected with the input of A/D converter with the output of short-circuit detecting circuit.

3, programmable temperature and speed measuring control device according to claim 1 is characterized in that: temperature sensor is a thermo-sensitive resistor.

4, programmable temperature and speed measuring control device according to claim 1 is characterized in that: near switch is that the NPN type is near switch.