JPH0184194U

JPH0184194U -

Info

Publication number: JPH0184194U
Application number: JP1987177227U
Authority: JP
Priority date: 1987-11-19
Filing date: 1987-11-19
Publication date: 1989-06-05

Description

[Brief explanation of drawings]

第１図は温度信号と湿度信号とで搬送波を変調
する状態を示すグラフ、第２図は変調された信号
を周波数―電圧変換回路で復調して、電圧値が異
なる温度信号と湿度信号とを得る状態を示すグラ
フ、第３図および第４図は送信手段と、受信手段
とを示すブロツク線図、第５図は他の実施例を示
す送信手段のブロツク線図、第６図は温度信号と
湿度信号とで搬送波がＡＭ変調された周波数スペ
クトルを示すグラフである。１……送信手段、２……受信手段、３……切換
回路、４……変調回路、５……周波数―電圧変換
回路、６……電圧選別回路、７……温度センサー
、８……湿度センサー、９……検出回路、１０…
…基準電源、１１……タイマー、１２……スイツ
チ素子、１３……電力増幅回路、１４……高周波
回路、１５……表示回路、１６……基準電源、１
７……ダイオード。 Figure 1 is a graph showing the state in which a carrier wave is modulated by a temperature signal and a humidity signal, and Figure 2 is a graph showing how the modulated signal is demodulated by a frequency-voltage conversion circuit to convert the temperature signal and humidity signal with different voltage values. Figures 3 and 4 are block diagrams showing the transmitting means and receiving means, Figure 5 is a block diagram of the transmitting means showing another embodiment, and Figure 6 is the temperature signal. 12 is a graph showing a frequency spectrum in which a carrier wave is AM-modulated with a humidity signal and a humidity signal. DESCRIPTION OF SYMBOLS 1... Transmission means, 2... Receiving means, 3... Switching circuit, 4... Modulation circuit, 5... Frequency-voltage conversion circuit, 6... Voltage selection circuit, 7... Temperature sensor, 8... Humidity Sensor, 9...Detection circuit, 10...
... Reference power supply, 11 ... Timer, 12 ... Switch element, 13 ... Power amplifier circuit, 14 ... High frequency circuit, 15 ... Display circuit, 16 ... Reference power supply, 1
7...Diode.

Claims

[Scope of utility model registration request]

In a wireless transmission device comprising a transmitting means 1 for transmitting radio waves obtained by modulating a carrier wave with a temperature signal and a humidity signal, and a receiving means 2 for receiving the radio waves and demodulating the temperature signal and the humidity signal, the transmitting means 1 includes a switching circuit 3 that switches between a temperature signal and a humidity signal at a constant cycle, and a modulation circuit 4 that modulates a carrier wave to different frequencies with the temperature signal and humidity signal;
The receiving means 2 has a frequency-voltage conversion circuit 5,
The transmitting means 1 is equipped with a voltage selection circuit 6 that sorts the signal demodulated by the frequency-voltage conversion circuit 5 by voltage to distinguish between a temperature signal and a humidity signal, and the transmitting means 1 is configured to separate temperature and humidity signals using different carrier frequencies. transmitted by radio waves,
The receiving means 2 receives this radio wave, demodulates it in the frequency-voltage conversion circuit 5, and then demodulates it in the voltage selection circuit 6.
A wireless temperature and humidity transmission device configured to detect transmitted temperature and humidity by distinguishing a temperature signal and a humidity signal by voltage value.