CN205961082U

CN205961082U - A button on -off control device for calorimeter

Info

Publication number: CN205961082U
Application number: CN201620803873.0U
Authority: CN
Inventors: 张慧娟; 蒋罗庚
Original assignee: Hunan Weiming Energy Technology Co Ltd
Current assignee: Hunan Weiming Energy Technology Co Ltd
Priority date: 2016-07-28
Filing date: 2016-07-28
Publication date: 2017-02-15
Anticipated expiration: 2026-07-28

Abstract

The utility model provides a button on -off control device for calorimeter, includes controller, power module, touch -sensitive button, response monitoring input circuit, touch -sensitive chip and read -write circuit, the touch -sensitive button connect the touch -sensitive chip through response monitoring input circuit to signal input to touch -sensitive chip with the touch -sensitive button, the controller still is connected with the touch -sensitive chip through read -write circuit for data message to the touch -sensitive button carries out read operation or write operation. The utility model discloses based on capacitanc touch -sensitive principle, the low -cost capacitanc touch -sensitive button of self -control has reduced the cost that installs, adopt the touch -sensitive chip and messenger's ability control circuit of low -cost low -power consumption, realized controlling means's in good time start -up and in good time dormancy, reduced controlling means's consumption, adopt reliable and stable circuit and chip, improved controlling means's reliability and life -span.

Description

Key switch controller for calorimeter

Technical field

This utility model is specifically related to a kind of key switch controller for calorimeter.

Background technology

Development with national economy technology and the raising of people's living standard, heating system has also progressively come into thousand ten thousand Family, substantially increases the residence comfort of the people.

Calorimeter, as important ingredient in heating system, carries the critical function of metering heat, therefore it can By property and its important.At present in calorimeter industry, the calorimeter with display screen all carries keypress function, for display screen display content Switching.But great majority still adopt mechanical key, also have a seldom part to adopt magnetic key.Traditional mechanical formula push button longevity Short, waterproof moisture-proof effect is poor；Although and magnetic key adopts hermetically sealed design, improve waterproof and dampproof performance, due to big How to be isolated using glass, not only relatively costly, sensitivity is not high, and power consumption is larger, and the calorimeter of this carrying magnetic button Fragile, poor reliability, and be unfavorable for transporting.

Utility model content

The purpose of this utility model is to provide a kind of low-power consumption, long-life key switch for calorimeter to control dress Put.

This key switch controller for calorimeter that this utility model provides, including controller and power supply mould Block, also includes touch sensible button, induction monitoring input circuit, touch sensible chip and read/write circuit；Described touch sensible Button connects touch sensible chip by induction monitoring input circuit, thus by the signal input of touch sensible button to touch sense Answer chip；Controller is connected with touch sensible chip also by read/write circuit, for entering to the data message of touch sensible button Row read operation or write operation.

The described key switch controller for calorimeter also includes enabling control circuit；Controller is controlled by enable Circuit processed connects touch sensible chip, and transmits enable signal to touch sensible chip, thus enabling touch sensible chip.

Described controller is PLC, single-chip microcomputer, DSP or FPGA.

Described power module is battery.

Model SX9500 of described touch sensible chip.

Described touch sensible button is capacitance touch induced key.

Described capacitance touch induced key is arranged on pcb board, and solid including pcb board is covered copper pad and surround real The heart covers copper pad and the solid second copper-clad region covered copper pad insulation and be connected to ground；Described solid cover copper pad and Form parasitic capacitance between two lying copper region domains, solid cover the positive pole that copper pad is parasitic capacitance, second copper-clad region is parasitic electricity The negative pole holding；Solid cover copper pad and change and solid cover parasitic capacitance between copper pad and second copper-clad region by touching Size, by detecting described parasitic capacitance thus realizing the function of capacitance touch induced key.

The connection of described capacitance touch induced key, induction monitoring input circuit and touch sensible chip, specially Induction monitoring input circuit is resistance, and the positive pole of capacitance touch induced key passes through described resistance with touch sensible chip even Connect.

Described enable control circuit includes switching tube, the first filter circuit and the second filter circuit；The activity of switching tube The one end at end connects the power pins of controller, and the other end is drawn by the power supply that the first filter capacitor connects touch sensible chip Foot；The control end of switching tube connects the I/O pin of controller, is grounded also by the second filter circuit simultaneously.

Connection between described touch sensible chip, read/write circuit and controller, specially read/write circuit are on three tunnels Pull-up resistor；Touch sensible chip is output as 3 road rs 232 serial interface signals, is connected with positive source by respective pull-up resistor respectively, 3 simultaneously described road rs 232 serial interface signals are connected with the serial ports pin of controller.

This key switch controller for calorimeter that this utility model provides, with capacitance touch principle of induction Based on, the capacitance touch induced key of self-control low cost, reduce the cost of device；Touch using low cost low-power consumption Induction chip and enable control circuit, it is achieved that the in good time startup of control device and in good time dormancy, reduce the work(of control device Consumption；Using reliable and stable circuit and chip, improve reliability and the life-span of control device.

Brief description

Fig. 1 is functional block diagram of the present utility model.

Fig. 2 is the schematic diagram of capacitance touch induced key of the present utility model.

Fig. 3 is the circuit connection diagram of induction monitoring input circuit of the present utility model.

Fig. 4 is the circuit connection diagram enabling control circuit of the present utility model.

Fig. 5 is the circuit connection diagram of read/write circuit of the present utility model.

Specific embodiment

It is illustrated in figure 1 functional block diagram of the present utility model：This pressing for calorimeter that this utility model provides Key switch control device, including controller, power module, touch sensible button, induction monitoring input circuit, touch sensible core Piece, read/write circuit and enable control circuit；Described touch sensible button connects touch sensible by induction monitoring input circuit Chip, thus by the signal input of touch sensible button to touch sensible chip；Controller is felt with touching also by read/write circuit Chip is answered to connect, for carrying out read operation or write operation to the data message of touch sensible button；Controller is controlled by enable Circuit connects touch sensible chip, and transmits enable signal to touch sensible chip, thus enabling touch sensible chip.

Controller can adopt PLC, single-chip microcomputer, DSP or FPGA；Power module preferentially adopts battery；Touch sensible chip Model SX9500.

It is illustrated in figure 2 the schematic diagram of capacitance touch induced key of the present utility model：Described capacitance touch sense Answer key layout on pcb board, solid including pcb board is covered copper pad 1 and surround and solid cover copper pad and solid cover copper pad Insulation and the second copper-clad region 2 being connected to ground；Described solid covering forms parasitic electricity between copper pad and second copper-clad region Hold, solid cover copper pad be parasitic capacitance positive pole（In figure indicates V+）, second copper-clad region is the negative pole of parasitic capacitance（In figure Indicate V-）；Solid cover copper pad and change and solid cover parasitic capacitance between copper pad and second copper-clad region by touching Size, by detecting described parasitic capacitance thus realizing the function of capacitance touch induced key.

It is illustrated in figure 3 the circuit connection diagram of induction monitoring input circuit of the present utility model：Induction monitoring inputs Circuit is resistance（In figure indicates R45）, the positive pole of capacitance touch induced key passes through described resistance and touch sensible chip connects Connect；The negative pole of capacitance touch induced key is connected with the ground pin of touch sensible chip.

It is illustrated in figure 4 the circuit connection diagram enabling control circuit of the present utility model：Enable control circuit to include Switching tube（In figure indicates V14）, the first filter circuit（In figure indicates C57 and C124）With the second filter circuit（In figure indicates R76 And C125）；One end of the movable end of switching tube connects the power pins of controller（In figure indicates VCC）, the other end pass through first Filter capacitor connects the power pins of touch sensible chip（In figure indicates VDD）；The control end of switching tube（In figure indicates EN_ KEY）Connect the I/O pin of controller, be grounded also by the second filter circuit simultaneously.When needing to enable touch sensible chip, Controller controls enable signal to be changed into low level, now switching tube conducting, and touch sensible chip works on power；When do not need touch During induction chip work, controller controls enable signal to be changed into high level, and now switching tube is closed, touch sensible chip power-down, Do not work, with reducing energy consumption.

It is illustrated in figure 5 the circuit connection diagram of read/write circuit of the present utility model：Read/write circuit is three tunnel pull-up electricity Resistance（In figure indicates R73, R74 and R75）；Touch sensible chip is output as 3 road rs 232 serial interface signals, passes through respective pull-up electricity respectively Resistance and positive source（In figure indicates VDD）Connect, 3 simultaneously described road rs 232 serial interface signals are connected with the serial ports pin of controller.

Claims

1. a kind of key switch controller for calorimeter, including controller and power module it is characterised in that also including Touch sensible button, induction monitoring input circuit, touch sensible chip and read/write circuit；Described touch sensible button passes through sense Input circuit should be monitored and connect touch sensible chip, thus by the signal input of touch sensible button to touch sensible chip；Control Device processed is connected with touch sensible chip also by read/write circuit, for the data message of touch sensible button is carried out read operation or Write operation.

2. the key switch controller for calorimeter according to claim 1 is it is characterised in that also include enabling control Circuit processed；Controller passes through to enable control circuit and connects touch sensible chip, and transmits enable signal to touch sensible chip, from And enable touch sensible chip.

3. the key switch controller for calorimeter according to claim 1 is it is characterised in that described controller For PLC, single-chip microcomputer, DSP or FPGA.

4. the key switch controller for calorimeter according to claim 1 is it is characterised in that described power supply mould Block is battery.

5. the key switch controller for calorimeter according to claim 1 is it is characterised in that described touch sense Answer model SX9500 of chip.

6. the key switch controller for calorimeter according to one of claim 1 ~ 5 is it is characterised in that described Touch sensible button is capacitance touch induced key.

7. the key switch controller for calorimeter according to claim 6 is it is characterised in that described condenser type On pcb board, the solid copper pad that covers including pcb board is covered with solid touch sensible key layout with the solid copper pad that covers of encirclement The second copper-clad region that copper pad insulate and is connected to ground；Described solid cover to be formed between copper pad and second copper-clad region post Raw electric capacity, solid cover the positive pole that copper pad is parasitic capacitance, second copper-clad region is the negative pole of parasitic capacitance；Solid by touching Cover copper pad and change the solid size covering the parasitic capacitance between copper pad and second copper-clad region, by detecting described parasitism Electric capacity is thus realize the function of capacitance touch induced key.

8. the key switch controller for calorimeter according to claim 7 is it is characterised in that described condenser type The connection of touch sensible button, induction monitoring input circuit and touch sensible chip, specially induction monitoring input circuit are electricity Resistance, the positive pole of capacitance touch induced key is connected with touch sensible chip by described resistance.

9. the key switch controller for calorimeter according to claim 2 is it is characterised in that described enable control Circuit processed includes switching tube, the first filter circuit and the second filter circuit；One end of the movable end of switching tube connects controller Power pins, the other end passes through the power pins that the first filter capacitor connects touch sensible chip；The control end of switching tube connects The I/O pin of controller, is grounded also by the second filter circuit simultaneously.

10. the key switch controller for calorimeter according to claim 9 is it is characterised in that described touch sense Answer the connection between chip, read/write circuit and controller, specially read/write circuit is three road pull-up resistors；Touch sensible chip It is output as 3 road rs 232 serial interface signals, be connected with positive source by respective pull-up resistor respectively, simultaneously described 3 road rs 232 serial interface signals It is connected with the serial ports pin of controller.